SCHUNK - Workholding Solutions, Automation Components, Toolholding Components, Gripping Systems, Linear Systems http://www.gb.schunk.com/RSS/news/EN/overview/index.rss en Wed, 01 Jul 2009 14:27:45 GMT Thu, 09 Sep 2010 14:54:32 GMT http://217.5.167.5/schunk_files/website_images/schunk_logo_top_navi_v2.gif SCHUNK - Workholding Solutions, Automation Components, Toolholding Components, Gripping Systems, Linear Systems http://www.gb.schunk.com/RSS/news/EN/overview/index.rss http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?14096 Mon, 30 Aug 2010 01:00:00 GMT <![CDATA[Magnetic Lifting Technology Program for Lifting Magnets has been enlarged]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=14096&country=INT&lngCode=EN&lngCode2=EN
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SCHUNK, the competence leader in clamping technology and gripping systems is well-known for the MAGNOS magnetic clamping solutions. Just in time for the AMB show, SCHUNK presents their enlarged program for permanent lifting magnets, which can be manually and electrically actuated, and for the first time ever, pneumatically. By offering this option, SCHUNK transfers the proven magnetic technology onto pneumatically actuated manipulators, balancers and automated solutions. Since the modules are easily actuated with compressed air, costs for commissioning are drastically reduced.
Competent pneumatic module benefits from the existing compressed air control
Compressed air is the most important energy source for balancers and manipulators, and this is why SCHUNK pneumatically actuates their lifting magnets. For actuation purposes, the magnetic module is actuated with compressed air for awhile. The compact MAGNOS modules are suitable for handling of round and flat components made of ferro-magnetic materials. Even robots can be equipped with the lifting module quickly and easily. The permanent magnets ensure safe clamping, even if the compressed air system is damaged.

Electro-module for very fast clamping
For the use of crane facilities and in the field of robotics, SCHUNK also offers electrically actuated permanent lifting magnets. They can be quickly actuated with a current pulse, which assures short cycle times. For time-critical applications, the combination of low weight, short cycle times and high clamping forces make the lifting technology powerful. In case of a power outage the components are kept safely clamped and fixed at the electro-permanent lifting magnet.

Manual solutions with high clamping performance
The simplest version of permanent lifting magnets from SCHUNK is manually actuated. The compact MAGNOS modules are notably robust and reliable. They are suitable for various fields of application. Even at a low weight, they have a high lifting and clamping performance. The same applies for workpieces with rough surfaces. Since the outside surfaces of the housing are not magnetic, they do not attract chips or dusts.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?14139 Tue, 24 Aug 2010 02:00:00 GMT <![CDATA[Extremely multi-functional force/torque sensor]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=14139&country=INT&lngCode=EN&lngCode2=EN
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SCHUNK'S 6-axis force/torque sensor, FTNet, is a real all-rounder: With its high-speed data output, four possible communication protocols, remote monitoring via LAN and configuration via web interface, it is currently the most multi-functional force/torque sensor for industrial automation. A total of 14 sizes cover load ranges between 12 N and 40,000 N.
FTNet has Ethernet, Ethernet/IP, DeviceNet and CAN Bus interfaces and thus provides unique interface compatibility for numerous applications. It can be used for product tests, robot assemblies or machining tasks such as grinding and polishing, as well as for robotic surgery, rehabilitation and neurological applications and in many other areas. It can even be used for the automation of sophisticated assembly, machining and finish tasks, that could previously only be dealt with by hand or using complex assembly machines.
The sensor measures the force and the torque in all six degrees of freedom. The signals are output via high-speed outputs and Ethernet with up to 7000 Hz or CAN. FTNet therefore also enables the implementation of highly dynamic control concepts. For remote monitoring, the sensor can simply be connected to the LAN. The system settings can be configured, displayed and adjusted via a web interface. In addition, a demo software provides a graphical view of the six-axis measurements in real-time. To ensure reliable operation, the FTNet has a cable breakage detection unit, an overload protection device and temperature compensation. The system consists of a sensor, shielded and robot-compatible Devicenet cables and a net box with Ethernet and DeviceNet/Can Bus interface.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?14196 Tue, 17 Aug 2010 02:00:00 GMT <![CDATA[Very efficient lightweight axis made of carbon fiber]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=14196&country=INT&lngCode=EN&lngCode2=EN
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Components made of carbon fiber are making many advances in racing and automotive engineering. With the CFK-axis system CLD, SCHUNK is now showcasing for the first time, a standardized linear axis made of carbon fiber. It is the lightest directly driven linear axis on the market. Compared with aluminum profiles, the weight of the profile reduces by 58 per cent. For multi-axis handling systems, where complete Z- or Y axis are moved, the lightweight design ensures efficiency and helps the axes to accelerate, saving a lot of energy in the process.
The innovative linear module from SCHUNK offers many advantages. The carbon composite makes the axes extremely light, yet stable. Due to the higher E-module, they dispose of a higher bending and torsional stiffness than aluminum profiles. The high dampening reduces vibrations and results in a higher dynamical stiffness. If the material heats up during operation, it stays dimensionnally stable. These are the best pre-conditions for micron-precise use of inspection and handling applications. The efficient light-weight axes give an edge to the users in respect to cycle times, and precision.
Linear direct drive is a precise pace-maker
The standardized CFK-axes from SCHUNK belong to the CLD serie. They owe its high dynamic and repeat accuracy to a servo-electric linear direct drive. They also assure their pole position, especially for high-speed applications in assembly automation. The driving force is transferred from scope-free precise driving elements without mechanic transmission elements directly onto the slide. Since the motor, measuring system and linear guidance are integrated into the axis profile or slide, they are extremely compact and have low space requirements. For achieving a maximum repeat accuracy, sliding rails made of steel are attached onto the CFK-profile and are then precision ground.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?14191 Mon, 16 Aug 2010 15:00:00 GMT <![CDATA[Controlling grippers with an iPad]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=14191&country=INT&lngCode=EN&lngCode2=EN
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With WSG 50, SCHUNK, the competence leader in clamping technology and gripping systems is now able to offer a sensitive gripper for the first time that can be controlled via Ethernet TCP/IP in addition to Profibus DP and that also has an integrated Web server for configuration and diagnostics. That makes programming, putting it into operation, remote maintenance and its provision with updates with an Apple iPad for example, extremely simple. The two communication protocols and the integrated control and regulation electronics ensure maximum flexibility when integrated into higher-order systems. The gripper of the innovative family-owned company is equipped with an internal MicroSD card for saving programs and documents.
One of the most sensitive grippers on the market
With its electronics integrated in the claw jaws, the WSG 50 gripper is able to measure the forces that occur during gripping by means of sensors. This feature makes it the ideal tool for handling sensitive samples in laboratories, pharmaceutical plants, research facilities and for measuring and testing applications. It can be used to safely and reliably handle products to be gripped that deviate significantly in terms of their sensitivity. The gripper fingers used are automatically identified and the corresponding parameters are selected. The WSG 50 gripper has a stroke of 110 mm and a variable gripping force between 1 and 120 N. Its gripping speed is 850 mm/s.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?14204 Mon, 16 Aug 2010 07:00:00 GMT <![CDATA[Up to 120 Picks per Minute]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=14204&country=INT&lngCode=EN&lngCode2=EN
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The pneumatically driven PPU-P unit from SCHUNK makes rapid Pick & Place possible. With up to 120 cycles per minute, it is the fastest pneumatic Pick & Place Unit on the market. Thanks to the control unit, the gripper can be placed directly over the individual target position, and is actuated through the standard control interface.
The horizontal and vertical motion overlap
 
In contrast to conventional pneumatic Pick & Place Units, the horizontal and vertical motion of the robust PPU-P unit overlap, and are positively driven via a curved roller, which reduces cycle times by one-third. At a 145 mm horizontal stroke, 45 mm (20 mm linear) vertical stroke and up to 1 kg moving mass, the unit achieves a cycle time of 0.63 s including 2 x 50 ms gripping time. Therefore the unit is suitable for various handling and assembly tasks in the field of electronic industry, medical technology and other industries, were small components are assembled.
 
In order to balance build-up tolerances, the horizontal stroke can be adjusted by up to 12 mm per side. Moreover, both end positions can be adjusted by 15 mm, independent from each other, and differences in height between the mounting and depositing position can be balanced without an intermediate stop.
The valve box makes the pneumatic unit more efficient
 
Combined with an intelligent valve box, which is optional, efficiency of the PPU-P increases even more. The valve box minimizes the consumption of compressed air, in turn boost energy consumption, and pulsing. The optimum circuit of both drive cylinders is already pre-adjusted. Up to four additional valves directly control the pneumatic actuators, for example, a gripper and a rotary actuator. By one single air feed, all the valves are comfortably and economically supplied with air. The motion of the arm system and of the actuators can be controlled at the same time, because the necessary software is already integrated into the system. For carrying out a complete cycle, the unit needs a command from a higher ranking control unit. Everything else is done automatically, making it easy to plug & play. Due to its hole pattern, the PPU-P smoothly fits into the modular system for modular assembly automation, and numerous gripping modules and rotary actuators can be easly combined.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?14202 Mon, 16 Aug 2010 02:00:00 GMT <![CDATA[Modular Long Stroke Gripper: The new Power Generation]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=14202&country=INT&lngCode=EN&lngCode2=EN
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With the PHL, SCHUNK launches a new generation of long stroke grippers. The PHL from SCHUNK alternatively disposes of a multi-tooth guidance or a profiled rail guidance, which increases the degree of efficiency of the module. More importantly, the modular design of the PHL offers 90 standardized versions from the beginning! Thus over-sizing is avoided, the consumption of compressed air and energy is minimized, and the required space for applications is reduced. With the PHL, SCHUNK makes efficient gripping of large strokes possible.
With jaw duides and a powerful multi-tooth guidance, the PHL is particularly suitable for rough environments. The gripper is equipped with roller bearings and profiled rail guidance, achieving a 25 percent higher degree of efficiency. The guiding carriage of the gripper fingers have ball bearings, which minimizes friction and evenly distributes the force. Since the jaw guide is sealed and permanently lubricated, the bearing capacity of the gripper increases and reduces wear. Users benefit from reliability, precision, and long service life of the components.
Compact powerhouses reduce costs
 
The new gripper generation from SCHUNK surpasses the efficiency of conventional long-stroke gripper with slots or round guidance. For many applications, smaller and cost-efficient sizes can now be used, and due to the low consumption of compressed air, are working more efficiently. Longer fingers can also be used with almost the same gripping force. With its large stroke, the PHL is suitable for handling large components, and also for batch production, where various workpiece sizes are running through one single production line. Components with large undercuts can be clamped safely, too.
The modular concept allows an enormous variant diversity
 
No matter if the gripper is equipped with a multi-tooth guidance or a profiled rail guidance, five sizes with piston diameters between 25 and 63 mm are available. The design engineer can choose among three strokes per size, covering the whole range of strokes between 30 and 160 mm. Moreover, a spring-actuated gripping force maintenance for ID or OD gripping is available, making 90 standardized versions. The largest size of the PHL disposes of a gripping force of 3500 N and a maximum admissible finger length of 600 mm. Every size is available as a special version with viton seals or for high temperatures of up to 130 °C (266° F). Gripper positions can be monitored by inductive proximity switches or magnetic switches.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?14179 Thu, 12 Aug 2010 13:00:00 GMT <![CDATA[SCHUNK twitters]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=14179&country=INT&lngCode=EN&lngCode2=EN
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SCHUNK is now on Twitter! Followers will receive the latest trends in clamping technology and automation right to their phone! Tweets from this innovative, family-owned company will assure that users always receive the latest news from the competence leader in clamping technology and gripping systems. Those who want to be up to date should visit http://twitter.com/schunk_hq and register as a follower.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?14089 Mon, 09 Aug 2010 16:00:00 GMT <![CDATA[VERO-S: Quick-Change Pallet System of the next Generation]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=14089&country=INT&lngCode=EN&lngCode2=EN
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At the AMB Show in Stuttgart Germany, SCHUNK will showcase the quick-change pallet system for the next generation. The new set-up time killer is called VERO-S and will replace the SCHUNK UNILOCK module. The VERO-S is fully compatible to the previous system and offers an enormous package of performance advancements at the same price. Among the many benefits, the pull-in force of the new module amounts to 40,000 N. The customer also receives as standard a VERO-S module, where all the functional components are made of hardened stainless steel and thus is corrosion-resistant.
"SCHUNK is setting standards in precision and machine tool accessories with the completely new product line of quick-change pallet systems", said Markus Kleiner, Managing Director of the SCHUNK production facility in Mengen, Germany, where the clamping technology is manufactured. "There is no other manufacturer than SCHUNK, who offers such a vast standardized modular system for highly efficient workpiece clamping." With VERO-S set-up times can be reduced by 90%. This is how the competence leader in clamping technology and systems is paving the way to more precision, efficiency, process reliability and set up reduction in metal cutting.

Patented fast and clamping stroke
Thanks to the patented dual stroke actuation, the VERO-S has a pull-down force of up to 9,000 N. With the integrated turbo function, the pull-down force can increase to 40,000 N. The rigidity of the whole clamping solution profits from this higher force. "With the VERO-S, considerably higher cutting parameters are possible. Even extremely high shear forces can be absorbed reliably", said Kleiner. Locking of the new quick-change pallet system is done mechanically via a spring package. It is self-locking and clamps form-fit. Holding forces of up to 75,000 N are achieved. For opening the module, a pneumatic pressure of 6 bars is sufficient.
Just one size of clamping pin fits for all modules from size 90 to 176
VERO-S clamps workpieces, pallets, clamping stations and tombstones with one or more clamping pins. The radial aligned clamping slides of the quick-change pallet system pulls in the clamping pin and locks it. Fixing or exact positioning is done via a short taper. This assures a repeat accuracy of less than 0.005 mm. No matter if the new or the old system is concerned, all the SCHUNK clamping pins fit for all due to the uniform size of all quick-change pallet systems. Workpieces can be transfered from machine to machine accurately and seamlessly on the fly.
Maintenance-free and completely tight
In order to increase the modules life, process reliability, and to reduce maintenance, all the functional components of the VERO-S, such as base body, clamping pin and clamping slide are made of hardened stainless steel. Moreover, the maintenance-free module is completely sealed and protected against the penetration of chips, dust and coolant. Integrated into the standard module from SCHUNK is an air purge connection, and also the position of the clamping slide can be monitored via the air purge monitoring system. Each module can also be automatically loaded. Since the module is equipped with bottom and lateral air connections, it is completely flexible in its mounting method. Optionally, the VERO-S can be equipped with special sealing elements and can be actuated with non-lubrified air, too. "Particularly users, who decide for a quick-change pallet system for the first time, should attach utmost importance to the sustainability of a module", said Kleiner. "With its standard fully equipped version, the compatibility and standard full-range modular system for workpiece clamping, VERO-S has the best qualification."
Besuchen Sie SCHUNK vom 28.09. bis 02.10.2010 auf der AMB in Stuttgart: Halle 1 / Stand G12

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?14050 Sun, 01 Aug 2010 02:00:00 GMT <![CDATA[Efficient toolholders for automated tool grinding]]> http://www.schunk.com/schunk/schunk_websites/news/subject_of_the_month.html?article_id=14050&country=INT&lngCode=EN&lngCode2=EN
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Universalspannfutter: Die Profiliga zum Werkzeugschärfen

Wer beim automatisierten Werkzeugschärfen möglichst flexibel sein will und zugleich auf eine hohe Präzision angewiesen ist, sollte den Einsatz von Universalspannfuttern in Erwägung ziehen. Ein einziges Futter deckt dabei ohne zusätzliche Spannzangen, Zwischenbüchsen oder Verlängerungen ein breites Spektrum an Schaftdurchmessern ab. Jüngstes Beispiel für ein solches Profi-Schärffutter ist das hochgenauen Prismenspannfutter PRISMO von SCHUNK. Es spannt sämtliche Schaftdurchmesser zwischen 5 und 20 Millimeter hochpräzise und sicher. Bei einer Ausspannlänge von 2,5 x D und einem Werkzeugdurchmesser von 20 mm gewährleistet das Schärffutter eine Spannwiederholgenauigkeit < 0,005 mm. Dabei verhindert es zugleich Taumelschlag. Mit seinem variablen Spanndurchmesser, einer dreifachen Prismenführung sowie ineinander verzahnte Spannbacken bietet die flexibel einsetzbare Aufnahme ideale Voraussetzungen für die automatisierte Fertigung kleiner Losgrößen.
Bei PRISMO wird jede der fünf hartstoffbeschichteten Spannbacken von einem erodierten Doppelprisma geführt. Ein drittes Prisma ist unmittelbar auf die Spannfläche erodiert, die direkt am Werkzeugschaft anliegt. So passt sich das Spannmittel exakt an den jeweiligen Werkzeugdurchmesser an - ein deutlicher Unterschied zu bisher am Markt erhältlichen Lösungen, bei denen die Spannfläche einfach nur rund geschliffen ist. Selbst Einlippenbohrer und Werkzeuge mit Drall können in dem Schärffutter von SCHUNK präzise bearbeitet werden. Aufgrund der diamantähnlichen Hartstoffbeschichtung halten die Spannbacken selbst extremen Beanspruchungen durch Hartmetallwerkzeuge auf Dauer stand.
The constructive set-up, the basic bushing as well as the robust design contribute to an extremely high rigidity of the toolholder. Moreover, the stable guidances ensure that the grinding wheels will not swing up. In order to avoid dirt and to maintain permanently the high precision, the mounting is washed with cleaned oil during the grinding operation. Independent from the tool diameter, the X-axis of the grinding toolholder stays unchanged. Every chuck jaw remains in the same axial position. Time-consuming additional programming and the risk of a crash due to an unconsidered off-set of the X-axis, is no longer to worry. For connecting the prism toolholder to the grinding machine, SCHUNK offers a matching flange for the interfaces of the most important manufacturers of tool-grinding machines, which aligns and adjusts the toolholder quickly and easily.
For tool grinding the toolholder plays an essential role because microns will decide the quality of the manufactured tool edges. In view of small batch sizes and various tools, a multi-purpose toolholder is needed. The holder would have to be precise for exact cutting edge geometries and surfaces, slim to avoid interference between the grinding wheel, powerful for very short clamping depths, and have a high material removal rate as well. Flexibility is also required for covering many different shaft diameters. All of these requirements are persuading companies to use automated grinding machines in order to reduce their current costs. A comparison between popular toolholders will demonstrate the differences of the individual systems and will show which solution pays off in the end.
Precision, flexibility and cost-effectiveness, are three factors, which are decisive for production grinding of standard and special tools as well as for re-sharpening shank toolholders. All of them are significantly influenced by the toolholder, especially where automated machining solutions are concerned.

Collet chucks: Favorable in price but not that precise

Most favorable in price are the universal collet chucks, which are automatically actuated. For automatic loading, each tool is inserted in a collet chuck and is placed into the machine rack. Due to their design, the mountings dispose of a relatively imprecise run-out and repeat accuracy, which worsens over the course of time. During the grinding operation it often causes imbalance and makes it impossible to get precise grinding results. Collet chucks are also used for simple sharpening applications. If they are used for demanding applications though, they soon reach their limits due to the lack of precision. Dust particles can also affect the mountings extremely, they can stick and the whole process can be disturbed. Inferior quality, machine breakdowns, and a higher cleaning effort can be the consequence, which are risks that can no longer be tolerated.
Hydraulic expansion toolholders: precise and effective

Users who want to be on the safe side, use precision mountings for tool sharpening. Although they are more expensive, they offer a permanently high run-out accuracy and are much more user-friendly. Therefore the power-actuated hydraulic expansion toolholders have proven themselves for automated grinding operations, since they have no dirt-prone openings or gaps and are maintenance-friendly. Their high run-out and repeat accuracy directly improve the geometry of the tool’s cutting edges. Users benefit from an even material removal and a high process reliability. The hydraulic system dampens the mountings during grinding against vibrations and thus provides excellent surface qualities. The high grinding results also increase the tool life by about 75%.
In the same way as collet chuck mountings, the tools are manually inserted into the intermediate sleeves of the hydraulic expansion toolholders, placed into racks and then the machine automatically exchanges it on the hydraulic expansion toolholder which is located on the machine spindle. SCHUNK also equips their mountings with a 25° chamfer at the chuck nose, which reduces the interfering contours by 40%.
The high quality of the hydraulic expansion toolholders does increase their price. The price of the mountings and intermediate sleeves also differentiate from the collet chuck mountings and the collet chucks.
Supplying independent from a system

SCHUNK offers an extremely broad spectrum of precise toolholder systems for tool-sharpening. With more than 1,800 employees, a nationwide network of area sales managers in Germany, 23 international subsidiaries, distributing partners in more than 50 countries as well as a world-wide operating service, SCHUNK promises that the user will be advised objectively and independent from any system and will receive the optimum solution for his clamping task.
The "slimming agent" for tool sharpening

A combination of precision mountings and precision extensions are also widely-used. Instead of inserting them into collet chucks or hydraulic expansion bushings, the tools are stored in toolholder extensions and are clamped in hydraulic expansion toolholders for sharpening purposes. Thereby the hydraulic expansion toolholder aligns the extension with the tool and dampens occurring vibrations. The extension also assures less interfering contours.
If TENDO hydraulic expansion toolholders and TRIBOS extensions are combined, the achievable run-out accuracy of normal tool lengths amounts to 0.003 to 0.006 mm, measured at the sharp cutting edge. This excellent run-out accuracy helps to achieve very precise tool geometries.
For tool clamping, the polygonal clamping technology uses a polygon-shaped cross section. For tool change, the toolholder is located in a clamping device and then actuated with a predefined force, which deforms the clamping bore within the permanently elastic range, and the tool shank can be then inserted into the circular bore. As soon as the force is released, the clamping bore re-establishes the initial state and the tool is clamped safely. This clamping operation can be repeated thousands of times, without causing symptoms of fatigue, or loss of the high run-out and repeat accuracy. The extensions are dirt-resistant sealing out even smallest dust particles. Due to the sealed design, they are absolutely maintenance-free. For automatic loading of the grinding machine, polygonal extensions are available, even with a gripper collar.
The heat shrinking extensions can be used in a similar way. They are heated in a heat shrinking unit and the bore slightly expands. Then the tool shank can be inserted and the extension is cooled down again. Thereby the mounting shrinks to its original size and clamps the tool safely. However, in case of the heat shrinking mountings two risks can occur, that users burn at the mounting, and in the course of time, the mountings lose its primarily high repeat accuracy. Moreover, the heat shrinking units are more expensive than a hydraulic expansion device for polygonal clamping toolholders.
]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13885 Thu, 01 Jul 2010 02:00:00 GMT <![CDATA[Pick & Place Solutions in Comparison]]> http://www.schunk.com/schunk/schunk_websites/news/subject_of_the_month.html?article_id=13885&country=INT&lngCode=EN&lngCode2=EN
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These examples show that every Pick & Place solution has its strengths and weaknesses. While modular designed solutions cover all imaginable requirements, compact Pick & Place Units mostly score at high speed applications. It is the very important to work out an optimum combination from the given application data.
SCHUNK, the competence leader for clamping technology and gripping systems offers a vast module program for every thinkable Pick & Place application. A neutral analysis proves that the operator will receive a customized and time-effective solution. For a rough evaluation, data on strokes, masses and required cycle times are needed. The SCHUNK experts will then quickly work out the details for an optimum solution. Moreover, SCHUNK works out solutions with different drives, 3-axis system or planar gantries for sophisticated tasks. The comprehensive modular program proves that from the gripper, to the rotary module, to the linear axis, all components are individually adjusted to each other.

While pneumatic solutions normally do not offer more than two intermediate positions, solutions with electric drives offer more freedom to the operator. Conventional modular set-up Pick & Place solutions mostly work in Z-direction with a spindle drive, and in Y-direction with a belt drive, which is comparably lower in price and achieves respectable speeds of 8 m/s. Conventional electrically driven Pick & Place solutions achieve constantly high forces and allow payloads of up to 800 kg, and large stokes of up to eight meters. Although both values never play an important role in the classic assembly automation, it shows the broad spectrum for possible applications. Due to the self-locking effect of the spindle drive, this kind of conventional solutions can be also used without an additional safety device for safety-relevant applications.
For automated assembly of small components, conventinal solution can be applied to some extent, since the spindle and belt drive are not that rigid, and repeat accuracies of less than 0,1 mm can be assured for such solutions. Due to the comprehensive mechanics, wear parts must be regularly exchanged, which causes additional maintenance costs. When assembling small components, the conventional electrically driven solutions reach their limits, even when needing low strokes. In both cases it is better to change over to axes with linear direct drives.

In order to assemble components fast and precisely, operators can choose between many different Pick & Place solutions. The performance features of the systems vary from each other. To find the best solution, the advantages and disadvantages of each system should be compared.
In the past, rotating cam shafts were the exclusive means of actuation for Pick & Place units. In fact, mechanic solutions with ground cam disks are still in use, which carry out defined motions in a defined cycle time. In modern manufacturing concepts though, they are replaced by pneumatic or electrically driven solutions, which offer more freedom to the operator. Because of the increasing variety of options, miniaturization, and the growing cost pressure, precise, fast and process reliable solutions are now in great demand.
The low-maintenance linear direct drives are more precise and faster. There is only one interface between the motor and the slide. Modular designed solutions with linear direct drives offer maximum precision, flexibility, speed and comfort. They provide reliable repeat accuracies of less than 0.01 mm. However, the purchase price of the solutions are higher than of pneumatic or conventional electrical solutions, and are even more expensive when larger axes are needed.
In addition to the build-up of the directly driven linear modules, the stroke and driving forces can be individually defined and controlled. This flexibility particularly pays off if components have to be changed often. In case of insertion processes, the individual forces can be measured by a control system. With linear direct drive, strokes of up to 3.800 mm are possible. When using high speed applications, this is a disadvantage, since the motor of the vertical axis is also moving in the same direction and at high speeds increases the danger of a cable break. Due to the motor, a relatively high mass has to be moved, which in turn reduces efficiency.
Engineers are now becoming more aware of the advantages of mechatronic solutions. Their high flexibility and dynamics, and the low operating costs are very attractive. However, compared with a pneumatic system, the price of an electrically driven solution is still 2 - 3 times higher. If the same components are to be repeatedly assembled, and mechatronic knowledge is not available, a pneumatic solutions is still the best choice.
For easy Pick & Place applications, the combination of two pneumatically driven linear modules is ideal. By combining the corresponding sizes, design models and built-up systems, and by adjusting the end positions, such solutions can be individually adjusted for every application. In the area of assembly automation, current strokes of 200 mm in horizontal and 100 mm in vertical direction can be achieved at a cycle time of 1.2 seconds. In case of modular set-up pneumatic solutions, strokes of up to 1500 mm can be achieved.

As for the pneumatic solutions, in the field of linear directly driven Pick & Place Units there is a very compact solution available now, which combines the most essential advantages. The fastest Pick & Place Unit, PPU-E from SCHUNK comes on the market, which does not require a moving motor cable, since the motor of the vertical axis is also fixed. With rapid cycle times and an excellent repeat accuracy of less than 0.01 mm, it is setting standards in assembly of small components. The cycle time amounts to just 0.58 seconds, which includes switching and gripping times at a vertial stroke of 40 mm, a horizontal stroke of 120 mm and a moving mass of 2 kilograms.
All the feed lines for power supply, control, sensor system and pneumatics of the compact unit are plugged in at the rearward stationary connection. Cable breaks and plant disturbances are excluded. The freely programmable unit is designed for a 100 mm vertical stroke, a 270 mm horizontal stroke and a moving mass of 3 kilograms. It carries out high speed assembly tasks with high precision, and due to the force control, it is also suitable for insertion processes, pressing in and force measuring. For using all the numerous options, the operators should have knowledge in handling mechatronic solutions and can be trained if necessary.

In the meantime, pneumatic solutions for high speed precise applications are now available, which achieve up to 120 picks per minute. This compact pace-maker has repeat accuracies of up to 0.01 mm. In contrast to conventional pneumatic solutions, the horizontal and vertical motions overlap and are positively driven by a curved roller. They can be actuated faster compared to conventional pneumatic Pick & Place solutions, reducing cycle times by 50 %.
Such a solution is ideal for operators, who do not have mechatronic knowledge, but wish to achieve high cycle times. These units are comparabily low-priced and can be set-up quickly. Strokes can be adjusted via end positions. In order to increase energy efficiency, an optional valve box minimizes the compressed air consumption which increases energy supply and cycle times. The maintenance requirements of the pneumatic units is low, with the shock absorbers having to be exchanged every four to five million cycles.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13902 Wed, 16 Jun 2010 02:00:00 GMT <![CDATA[Henrik A. Schunk new Chairman of EUnited Robotics]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13902&country=INT&lngCode=EN&lngCode2=EN
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Henrik A. Schunk, Managing Partner of SCHUNK in Lauffen (Germany), was elected as the new Chairman of EUnited Robotics for the period of three years. Henrik A. Schunk is the successor of Stefan Müller, former CEO of KUKA Roboter in Augsburg (Germany), who was one of the founding members and Chairman of the European Robotics Association for the past six years. During the EUnited Robotics members’ assembly the new Chairman thanked Mr. Müller for his outstanding contributions to EUnited Robotics and European robotics in general and wished him all the best for his retirement.
Anders Nylander, CEO of ABB AB Robotics in Västeras (Sweden) and Maurizio Filoni, CEO of COMAU Robotics in Grugliasco (Italy) were elected Vice Chairmen.
The new EUnited Robotics board will continue to speak up for the robotics industry in Europe. Building on good contacts to the European Commission, universities and research institutes EUnited Robotics will further support industrially relevant research projects and technology transfer. EUnited Robotics is a core partner in the euRobotics Coordination Action and responsible for the management of the Secretariat of EUROP (European Robotics Technology Platform) - both ambitious initiatives of the European Commission within the Seventh Framework Programme (FP7) aiming at improving cooperation between industry and academia in robotics. "It’s good and necessary that all robotics organisations and platforms in Europe join forces in order to achieve common goals and maximum efficiency", said Henrik A. Schunk. Another focus for the EUnited Robotics activities will lie on strengthening public relations for a better acceptance and awareness of robotics in society and in everyone’s perception.
Another focus for the EUnited Robotics activities will lie on strengthening public relations for a better acceptance and awareness of robotics in society and in everyone’s perception.

EUnited Robotics, European Robotics Association, was founded in 2004 by major European robot manufacturers.
EUnited Robotics serves as a platform for manufacturers, component suppliers, and system integrators of robotics in Europe, creating a network of industry leaders. EUnited Robotics is the robotics industries’ voice in Europe representing the robot suppliers’ view on industry issues and R&D policies. The association is also a cooperation platform among all robotics stakeholders - from research institutes to national associations and customers.
Members: ABB (Sweden), COMAU (Italy), Güdel (Switzerland), ISRA Vision (Germany), KUKA Roboter (Germany), Reis Robotics (Germany), SCHUNK (Germany), Spinea (Slovakia) and SUMITOMO (Germany)
Cooperation partners: DLR German Aerospace Centre (Germany), Fraunhofer IPA (Germany) and Technische Universität München (Germany).
]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13872 Thu, 10 Jun 2010 01:00:00 GMT <![CDATA[Innovative Extensions are setting the Benchmark in Quality, Ergonomics, Set-up time and Cost]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13872&country=INT&lngCode=EN&lngCode2=EN
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Operators, who have to precisely machine the deepest angle in the fields of tool and mold making, can breathe a sigh of relief! At the EMO show in Milan, Italy, SCHUNK GmbH, the specialist in toolholding, workholding and automation presented a long, slim hydraulic tool extension which works without any peripheral equipment and independent of the type of spindle interface. The extension converts almost any precision toolholder into a highly flexible specialist for tight machine rooms. The precise run-out accuracy, the excellent vibration dampening and even an internal coolant supply assure excellent workpiece machining results and long tool life.
The highly precise, fine-balanced TENDO tool extension is based on SCHUNK hydraulic expansion technology and the tools can be changed quickly and easily with a T-handle Allen wrench. The actuation screw is located radially on the side making tool changes easy and if necessary they can be done directly in the machine. Our standard 12 mm and 20 mm diameter intermediate sleeves can be used to reduce to smaller clamping diameters

The high torque of the extension assures a safe hold of the tools during boring, reaming, and finishing. Instead of using expensive tools with a special design, one single TENDO extension is sufficient which can be equipped with various standard tools, depending on the application. With a high degree of flexibility, radial clamping actuation, internal coolant supply, and high torque, the innovative extension is setting benchmarks in quality at the workpiece, ergonomics, set-up time, and reduced costs.
The standard version of extensions consists of two different sizes with shank diameters of 32 or 20 mm. The TENDO SVL extensions are available in clamping diameter 20 or 12 mm, with an overall length of 150 mm. Additional length 200 mm for 32 mm shank diameter is available on request.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13864 Wed, 09 Jun 2010 12:00:00 GMT <![CDATA[Heinz-Dieter Schunk receives the 2010 Engelberger Robotics award for Leadership in Robotics]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13864&country=INT&lngCode=EN&lngCode2=EN
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During the 41 International Symposium of Robotics 2010, Heinz-Dieter Schunk, CEO of SCHUNK, in Lauffen, Germany, received the Engelberger Robotics Award. The Engelberger Award is considered to be the most prestigious award in the robotics field. It honors individuals, who have provided outstanding contributions in the areas of technology development, application, education, and leadership. The award is named after Joseph F. Engelberger, the founder of industrial robotics and father of the modern robot industry.

The prize has been awarded since 1977 by the Robotic Industries Association (RIA) trade organization in North Amercia. Leading robot manufacturers, suppliers and system integrators, operators, research groups, and consulting agencies make up the 250 members of the RIA.

Pioneer in Gripping Technology
 
Heinz-Dieter Schunk is a pioneer in the field of gripping technology. He recognized early on, that gripping would play a leading role in automation, and thus for robotics, too. He was one of the first engineers to develop standardized gripping modules. Today, SCHUNK is considered to be the worldwide competence leader in clamping technology and gripping systems. The SCHUNK program has more than 10,000 standard components. Among the many benefits, operators profit from the worldwide largest gripper program, the largest mechatronic gripper spectrum and from the 30-year functional warranty on multi-tooth guided gripping modules, which is second to none.
SCHUNK has kept its claim for leadership until today. As a pioneer in modular robotics, the company offers a vast modular system, from which various robot structurs for industry and research can be individually configurated. The modular lightweight arm, but also the multi-functional gripping hand SDH-2 have the highest compact performance; combined, highly flexible systems with 14 or more axes can be quickly configured.
SCHUNK Expert Days is the leading symposium for applied service robotics and has ties with over 100 universities, research institutions and highly specialized industrial companies. With this program, SCHUNK promotes the development of modular robotics and paves the way for completely new fields of applications.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13859 Wed, 09 Jun 2010 02:00:00 GMT <![CDATA[SCHUNK’s MPG-plus received the MM Award]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13859&country=INT&lngCode=EN&lngCode2=EN
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The all-rounder
 
In order to create the process- and plant design more flexible for design engineers, the module can be screwed through, fastened laterally, or from the bottom. Besides the inductive monitoring, the MPG-plus can be monitored via integrated and programmable magnetic switches. No big disturbing contours arise, because the sensor only detects two positions, "open" and "closed". In order to increase process reliability, additional switching points can be programmed. Therefore even at very low strokes a safe position monitoring and detection of various workpiece sizes is possible.

With the MPG-plus Miniature Parallel Gripper, SCHUNK brings about new solutions for the handling of small components. Compared with similar modules which require the same input, the new SCHUNK gripper for small components achieves a considerably higher output, clearing the way for smaller and more efficient systems. At the Automatica show 2010, this power gripper received the MM Award in the category "gripping technology" of the renowned magazine MM MaschinenMarkt.
The combination of an oval piston drive and roller bearings assure an enormous degree of efficiency for this compact powerhouse, and makes it to the most efficient miniature parallel gripper on the market. Due to the high force and moment loads, units of the same size can be equipped with longer gripper fingers and higher gripping forces are achieved. Alternatively, design engineers and operators can work with a smaller size at an identical power requirement. If the gripper should be equipped with micro valves, the actuation time can increase by up to 100 per cent. This booster in productivity saves valuable compressed air, and annoying assembly work.

Up to 25 % higher gripping forces
 
Compared with the previous MPG, the gripping force of sizes 40 increased from 110 amounts to 140 N, which is an increase by 25 per cent. The maximum admissible finger length is now 60 mm, instead of 40 mm. In other words, instead of size 50, size 40 will be enough for future applications.
 
By increasing the number of the cross roller guidances, the force is distributed more evenly, making the average basic load rating increase by 30 percent. This causes the bearing capacity of the complete guidance to improve, wear-out is reduced, which boosts the life of the gripper. For achieving a much higher precision, the roller guidances are individually adjusted. This makes them very stable and able to run smoothly

Light-weight design reduces the gripper weight
 
The MPG-plus was designed to be light-weight. Therefore, surplus material of the gripper housing was reduced. Moreover, inner components are made from special high-tensile aluminum now, and the weight of all gripper sizes was reduced on average by about 10 percent. In turn dynamics of the higher-ranking units can be increased.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13855 Tue, 08 Jun 2010 02:00:00 GMT <![CDATA[SCHUNK TV presents Show Highlights]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13855&country=INT&lngCode=EN&lngCode2=EN
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As of June 11, 2010, SCHUNK TV will send live reports twice a day from the AUTOMATICA show in Munich. By means of informative clips the latest automation highlights of the expert leader for clamping technology and gripping systems will be presented. The reports will start with a clip on the trend-setting SPB module of the new Powerball series from SCHUNK.
SCHUNK TV will provide comprehensive information and brilliant pictures in HD quality. As of June 12, 2010, a tour of the show booth will give you an idea of all the innovations. This is ideal for anyone, who missed the opportunity to visit the show in Munich personally, or who wants to see all the AUTOMATICA highlights from SCHUNK in a short summary.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13649 Tue, 01 Jun 2010 01:00:00 GMT <![CDATA[Energy efficient gripping]]> http://www.schunk.com/schunk/schunk_websites/news/subject_of_the_month.html?article_id=13649&country=INT&lngCode=EN&lngCode2=EN
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Mechatronics is one of the most effective modules for achieving highest energy efficiency. The module’s use of energy can be adjusted to the individual power requirement. This lowers non-productive losses. The total energy balance of electric automation components tend to a better degree of efficiency even in case of pneumatic solutions. Moreover, electric power supply networks work with fewer losses than pneumatic ones. The modules have an excellent energy supply and less energy gets lost within the network.
In the best of case scenario, energy-efficient automation modules should reduce energy consumption of the handling system and increase cycle times and output. It helps conserve the environment and saves money if you focus both measures.
High compact performance thanks to multi-tooth guidance and oval pistons

Efficiency, the optimum ratio between cost and benefit, has always been a central concern in automation. Machine builders who invest in high power components, usually achieve a much higher output.
Take a multi-tooth guidance gripper, for example, where the forces and moments are distributed onto several bearing surfaces, and the guidances may have a higher payload. Longer gripper fingers can be used for the same gripper size without overloading the module. Moreover, the contact pressure at the bearing surface is reduced and in turn reduces wear to a minimum. This assures a minimum guidance play for the life ofgripper.
But the highly efficient roller guide goes one step further: its effectiveness is higher than ball bearing guidances or sliding guides. The more rolls, the better the force is distributed, and thus the load capacity of the whole guidance increases, wear reduces and the service lifetime of the whole gripper improves. The rollers are particularly stable, smooth running, and efficient, if they are individually adjusted. In this case, compact performance and precision go hand in hand with each other.
Similar standards apply for the drives: the multi-toot guidance and also the oval piston drive allow high forces in small installation spaces. With an oval piston, installation space of the gripper housing is used more efficiently, the piston surface increases and energy of the compressed air is converted more efficiently into gripping force. Therefore the same gripper size achieves higher gripping forces. In the best cases, a multi-tooth guidance, roller guide and an oval piston drive are combined with each other.

Lightweight design achieved by FEM and CFK

Lightweight design is also an issue that offers a great efficiency potential. In the past, enormous safety margins had to be calculated, today, modern technologies such as the FEM method help to develop much lighter modules without impeding the bearing capacity or stability.
Lightweight design achieved by carbon composites (CFK) are even more effective. CFK is about 40 % lighter than aluminum, and is more rigid. It disposes of a tensile strength which doesn’t change, even if it is heated. Modern, automated operations help lower costs for a CFK module and helps achieve constantly high production quality. From the economic point of view, CFK is gaining importance. In the case of linear axes, CFK supporting structures allow weight reductions by about 55 %. Modern long-stroke grippers with a CFK supporting structure weigh 10 kg and dispose of a gripping force of up 4,000 N, and a variable stroke of up to 600 mm.

Outlook

Energy-efficient handling solutions are very economic and pay off in many respects: they lower energy consumption, increase cycle time, assure an efficient use of exisiting units, and reduce the power requirements of new ones. There are numerous possibilities to develop solutions, which are particularly resource-saving and economic too. Many of the SCHUNK modules are already available in standard version. They save time, increase process reliability, and conserve environment.
Valves safe energy and cycle times

Operators who are using pneumatic modules, can achieve enormous results by integrating micro valves. They assure high cycle times and noticeably minimize air consumption. In assembly technology, short cycle times and an average weight between one and three kilograms, micro valves play off their potentials. In general, the smaller the actuator, the more efficient is the use of micro valves. The cycle time is accelerated by up to 100 % and valuable compressed air is saved.
Because the valves can be directly located to the actuator, they reduce the air consumption. For every cycle, only the piston area of the actuator has to be filled with compressed air, and not the complete air line. At a three meter long feed line, which is four millimeter in diameter, about ten times more air is used than when using a directly connected miniature gripper.
Instead of long disturbing lines, compact valves carry out the pneumatic and electric supply of the valves, actuators and sensors. Using one common compressed air and electric line, any number of actuators can be supplied quickly and efficiently. For existing units, micro valves lower operating costs and the investment of an efficient complete compressed air system. Cycle times decrease as well because the compressed air acts directly on them.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13712 Tue, 25 May 2010 11:00:00 GMT <![CDATA[SCHUNK strengthens distribution in China]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13712&country=INT&lngCode=EN&lngCode2=EN
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More than ever before, China is the main focus of German machine builders. Within the next few years, SCHUNK would like to increase growth in the People’s Republic, and in preparation for this desired growth, SCHUNK has realigned their activities of distribution.
True to the SCHUNK philosophy of "Better for us" means "Better for you", we have now combined both of our key business areas. Previously, the locations at Hangzhou and Shanghai were divided into separate business units. Toolholding, Workholding and Automation have now been merged into the newly founded SCHUNK Intec Precision Machinery Trading (Shanghai) Co., Ltd.
This will benefit our Customer’s because the full range of Schunk products will be available from one supplier source & from one address!
The new company is based in Shanghai, where our representative office has been located since 2004. We have chosen Shanghai because many of the SCHUNK relevant industries are located there. Shanghai is considered the major commercial centre with links to the rest of China.
]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13686 Mon, 17 May 2010 02:00:00 GMT <![CDATA[Hydraulic Expansion Toolholders - Most powerful than ever]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13686&country=INT&lngCode=EN&lngCode2=EN
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With the TENDO E compact SCHUNK starts a new era in tool clamping. For the first time ever hydraulic expansion toolholders are available, which transfer torques of up to 900 Nm (at a 20 mm clamping diameter) safely and are absolutely adequate for volume cutting. With its excellent vibration damping and a very precise true-running accuracy of less than 0.003 mm at 2,5 x D, the precision mounting prevents the spindle but also the cutting edge from damage. The attractive priced hydraulic expansion toolholder convinces for finishing, drilling and reaming and therefore deserves the designation "all-rounder". For a fast tool change an Allen key is enough.
Users, who applied Weldon- or heat shrinking mountings in the past for cost reasons, can breathe a sigh of relief: For roughing operations tool costs of up to 40 % can be saved if a TENDO-E compact is used. Just some hand grips are enough for a rapid tool change with an Allen key, and in no time everything is safely clamped again. Particularly for small and medium-sized companies, the powerful hydraulic expansion toolholder is an excellent alternative.

Experienced operators are enthusiastic
Before market introduction of the precision toolholder SCHUNK asked operators to test them. The result was clear: No metal cutting expert would have dared to belief that an hydraulic expansion toolholder can ever achieve such high holding forces. Even if grooves are rough machined from the full material, this "powerhouse" assures a safe and precise hold of the tools. Due to the vibration damping, machining operation is extremely quiet.
Since it is the full intention to offer the toolholder just for the most important diameters, SCHUNK expects a high demand and therefore plans to produce large quantities, it was possible to reduce the manufacturing costs noticeable. SCHUNK passes on these cost advantages to their customers: The price of the TENDO E compact is situated between mechanical tool mountings and established hydraulic expansion toolholders. Therefore it is worthwhile for the user of Weldon- or heat shrinking toolholders to change to the more precise TENDO toolholder.
Mountings are available for the current interfaces HSK-A63, SK40 and BT40 at a clamping diameter of 20 mm. Further versions are already in preparation. Via intermediate sleeves the complete clamping range can be covered.

]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13558 Sat, 01 May 2010 01:00:00 GMT <![CDATA[Factor of Success Engineering - With virtual simulations to the optimum clamping solution]]> http://www.schunk.com/schunk/schunk_websites/news/subject_of_the_month.html?article_id=13558&country=INT&lngCode=EN&lngCode2=EN
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Sequence of simulation
In order to simulate the workpiece behaviour in the clamping unit and during the machining process, some data is required:
  1. 3D-solids of the workpiece, e.g. CAD data as a STEP file
  2. Details of the material
  3. Metal cutting parameter and maximum machining speeds
  4. Sketch of set-up with clamping and supporting points
  5. Specifications on holding forces/ jaw clamping forces
  6. Geometry of the chuck jaws, e. g. smooth, claw jaws, diamond serration
  7. Machine data, particularly specifications of the clamping cylinder and spindle arrangement

      8. This data is entered in the CAD program and a three dimensional model is created for the clamping application. Then the FEM programs the material and the contact surfaces of the set-up are defined and a first grid of individual elements with start and end notes are put over the solution. In subsequent loading steps, the individual edge conditions are defined. In a first loading step it can be simulated how the workpiece will behave, if a defined clamping force is transfered to certain points. In a second step it can be examined for example how the payload will change, if the component is turned in a lathe chuck. Finally in a third step the behavior during machining is simulated.
      After a first rough calculation, the grid can be reworked at extremely critical areas which improves the statement quality of the simulation. A three dimensional view or animation points out for each individual loading step, which radial or axial deformation occurs. This makes the three dimensional deformations above the so-called yield point relevant, since they do not achieve their initial shapes again. The simulation can also show, if with a certain clamping solution a defined run-out accuracy will be achieved.
      With the FEM method effects, caused by various set-ups, machining parameters, and various points of force transmission at the workpiece, can be simulated. Even clamping solutions can be simulated, where the clamping pin of a quick-change pallet system is directly screw connected with the workpiece. Here the FEM method provides statements on stability of the pin and the screw, and also on permanent deformations at the workpiece.
      With virtual simulations to the optimum clamping solution
      How does a component deform during the clamping process and machining? Which clamping solution assures that the workpiece has the exact dimensions? How can an existing clamping device be ideally used? Virtual simulations are giving valuable answers to these and simular questions. By means of the Finite Elements Method (FEM) deformations and component payloads can be calculated, which allows a comparison of the individual clamping options and how to optimize them. In turn, process and investment reliability are increased, development times shorten, the selection of the suitable clamping device is easier and costs are lowered.
      Simulation avoids expensive trouble shooting
      In the past, many components were made with the wrong dimensions because design engineers worked with extreme safety margins. Today safety itself is not a sufficient criterion for a good design. In order to survive on the global competitive market, developers and design engineers face constant challanges. They have to cut down time on project planning, manufacturing and be prepared to reduce energy consumption of their projects. On the other hand, precision, robustness and longevity of components and complete systems have to be increased, while future maintenance works have to be decreased. Because of this, simulations provide invaluable results! During the design phase, long before the first prototypes are built, simulations on a computer can determine, how the components will behave during maching, if accuracies can be assured after machining, and if due to the high clamping forces, structural changes at the workpiece might occur, which may weaken the material.

      Example: Clamping solution for drive laterns
      An example shows the possibilities of the FEM method. ALLWEILER AG is European-wide market and technology leader for pumps in the shipbuilding, power generation and special industry applications. By means of simulations the company tests the set-up of drive laterns made of cast iron GG25: They test if a component from the drive section of the pumps, which has been manufactured in three operations until now, can be machined in just two operations. In this case, the radial clamping behavior is tested in a 6-jaw compensation chuck.
      The first simulation shows that the untrue-running at the fitting Ø 218 f7 (tolerance 0.048 mm) after clamping, winding up and machining amounts to 0.054 mm and consequently is beyond the tolerated range. In a second simulation speed is increased, and the cutting data is adjusted, making the operation successful. By way of a pure variation of the machining parameter, ALLWEILER AG can machine the drive laterns with an existing standard clamping unit - an enormous cost savings, which could not have been achieveable without a detailed FEM analysis.
      Since the FEM method is always a theoretical calculation, it is advisable to carry out a practical test after the simulation. In most cases, the actual results hardly deviate from the calculated results. In case of hardened components or cast parts with casting skin, the internal stress of the material can sometimes cause major differences.

      SCHUNK offers simulations by call off
      SCHUNK disposes of an internal network of experts, who coordinate the modern computer-assisted development technologies (CAE) cross-project, using effective methods of calculation, prepare results and make them re-usable. This efficient instrument is used for toolholding, workholding, and automation.
      Since many operators do not have their own resources to carry out such a simulation, SCHUNK offers the know-how of theoretic basics and software with the competence in handling of the system and the knowledge of how to implement ideas. Operators can profit from this in many ways. They already know of possible weak points in advance, and on the basis of this simulation they can create precise engineering specifications and requirements or define well-directed clamping equipment and the type of set-up. This makes unnecessary investments or over-dimensioned systems a thing of the past. The simulation makes an important contribution to a higher efficiency for developing and manufacturing new products.

      Simulations pay off in particular where large and complex workpieces are concerned
      Precise machining of large, thin-walled or particularly complex components is often a challenge. Certain limits of clamping forces should not be exceeded, so that the workpiece will not deform or be damaged. On the other hand though, clamping must be sure enough that cutting forces can be absorbed. With the FEM method it becomes clear how the workpiece will behave during the clamping process and machining. The simulation is the basis for developing the optimum combination of clamping units, jaw design, clamping height, clamping force and speed. It supplies knowledge on fracture mechanics, rigidity, lifetime and vibration behavior of the components. Particularly in case of complex geometries and high precision requirements, as for bearings, gear wheels, turbo housings, cylinder heads or brake rings an early simulation offer enormous advantages.

      ]]> http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13441 Thu, 01 Apr 2010 02:00:00 GMT <![CDATA[Magnetic Clamping Technology - efficient at a variety of tasks]]> http://www.schunk.com/schunk/schunk_websites/news/subject_of_the_month.html?article_id=13441&country=INT&lngCode=EN&lngCode2=EN
      Complete News:
      Flat and jig milling:
      Parallel pole technology is the state-of-the-art
      The use of magnetic clamping technology is widespread for surface grinding. Small and large workpieces can be clamped in seconds. Even at jig milling machines, electro permanent magnets do not induce heat into the workpiece. This way, operators can precisely maintain the tightest tolerances.
      Turning and circular grinding:
      Deformation-free clamping of huge rings
      For turning and grinding of ring-shaped components, radial pole magnetic clamping technology is used. Thus large workpieces are clamped reliably and deformation-free on grinding machines and lathes - a decisive advantage over face plates and jaw boxes. Up to a diameter of 4,000 mm the radial pole magnets can be made from one piece to provide stability for every clamping operation. In case of large plate diameters however, a segment design is recommended, in order to facilitate transportation of the magnetic chucks.

      Magnetism is one of the most fascinating and influential force of our universe. Engineers and technicians use this same force in order to clamp workpieces, or to reliably lift components. Magnetic clamping technology is well-established in various areas, such as grinding, milling, turning, mobile lifting units in production, and for huge crane constructions. Most engineers now know that magnetic clamping solutions reduce set-up times by about 80 percent, that workpieces are clamped without any deformation, and even coils can be reliably transported.
      The principle function of the permanent or electro-permanent magnetic clamping technology is easy. In the "unclamped condition" the magnetic field flows within the module and has no influence to the outside. Through a short-term electric impulse, a lever mechanism or a pneumatic signal, the magnetic field is diverted to the outside and the magnetic clamping module is actuated. This process is absolutely reliable and doesn’t require a power supply or compressed air to maintain the magnetic field.
      Two conditions are require for the mechanism to function: The workpiece must be ferro-magnetic and cover equal amounts of north and south pole. In order to achieve an optimum clamping force, the area of flux should be as big as possible. The bigger or the more poles that cover the workpiece, the greater the magnetic holding force.

      Hybrid chucks combine radial pole technology and centering chucks
      The advantage of radial pole magnets is the variable power level adjustment, by which the workpieces can be easily aligned before the electro permanent magnet provides maximum hold. Due to the surface clamping, the workpieces stay within its shape and can be machined from three sides. Magnets provide excellent vibration dampening characteristics. Hybrid chucks are even more efficient, because the centering technology of conventional 3 or 6-jaw centering chucks is combined with the surface clamping technology of a radial magnet. With these chucks the workpieces are automatically centered from inside or outside and are clamped within seconds. In case of applications on grinding machines or lathes with pneumatic or hydraulic actuation, the hybrid chucks reduce the set-up times by about 80 percent and thus significantly increases productivity. Depending on the application, SCHUNK offers both radial pole magnets with automatic demagnetization, or with very high magnetic forces.

      Lifting loads:
      Fast and reliable
      Lifting magnets are used for applications in the field of intra-logistics. While very powerful, they can gently grip the component . For transportation of sensitive or thin-walled workpieces, lifting magnets are the ideal solution. Another field of application is handling of tubes, cylindrical components, large metal or cable rollers, otherwise called "coils". While conventional lifting equipment can cause mechanical damages at the surface or deform the shape of the workpieces, these types of damages can be avoided, if lifting magnets are used.

      On the one hand lifting magnets are available as a compact unit, which are actuated mechanically by a lever mechanism, or pneumatically actuated. On the other hand crane constructions for large tubes or steel plates are normally actuated with electro-permanent magnets and remote control.
      Milling:
      Five sides machined with just one set-up
      The square or parallel pole plates of the electro- permanent magnets offer decisive advantages: The magnetic set-up allows machining of the workpiece from five sides without having to re-clamp a second or third time. This is an enormous advantage especially if large workpieces have to be machined. Neither adjustment of the clamping elements nor several set-ups of the workpieces during the machining process are necessary. The ferro-magnetic workpiece is positioned, the controller is actuated and in a fraction of a second the permanent electro magnet provides reliable clamping - even if the current supply is disconnected. Side by side comparisons have shown that between 30 and 50 percent of the set-up time can be saved. Since the machine down-times considerably decreases, the capital investment of a magnetic solution normally amortizes in a short period of time.
      Moreover, large and small workpieces can be reliably clamped with the same magnetic plate. In order to compensate differences in height, the square or parallel poles can be individually adjusted to the workpiece contour. For parts with uneven surface the magnetic clamping technology is the ideal solution: the field density is strong enough to compensate rough surfaces.
      Handling components:
      Magnetic clamping technology for robots
      A magnet gripper for robots shows how versatile magnetic clamping solutions can be used: Adjusted to a robot arm the light-weighted magnetic gripper provides a reliable hold in small working areas. Electro permanent magnets can be actuated within seconds.
      Comprehensive expertise for standard and special solutions
      As an industry leader for toolholding, workholding and gripping systems, SCHUNK offers a broad portfolio of standardized magnets for every imaginable application, while they have also developed sophisticated special solutions based on magnetic clamping technology. The comprehensive experience of SCHUNK pays off in all modern fields of clamping technologies. This networked knowledge is the basis for innovative and striking solutions.

      Especially gentle
      Magnetic clamping solutions are gentle with fragile or easily deformed workpieces because a magnet does not induce any external forces. A magnet simply makes the workpiece appear heavier. Therefore thin-walled workpieces are not deformed and can be made flat and true. When large surfaces of the workpieces are milled, a plane-parallel configuration of up to 0.02 mm can be achieved utilizing self shimming pole extenders. The first surface is rough machined, then the workpiece is turned, rough machined, unclamped and then reclamped for finish machining.
      Magnetic surface clamping minimizes vibrations and prevents the cutting edge from damage. Particularly if high-quality tools are used, the magnetic clamping technology can reduce tool costs.
      ]]>             http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13512 Wed, 17 Mar 2010 11:00:00 GMT <![CDATA[Flexible precision toolholder for tool grinding The precise prism toolholder type PRISMO clamps every shank diameter between 5 and 20 millimeters]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13512&country=INT&lngCode=EN&lngCode2=EN
      Complete News:
      Without any doubt, the PRISMO tool grinding toolholder from SCHUNK is one of the highlights of this year’s GrindTec show. With its variable clamping diameter, a threefold prism guidance, and intermeshed chuck jaws, the all-purpose mounting achieves high repeat accuracies of less than 0.005 mm and avoids tube unbalance almost completely. These are ideal pre-conditions for automated manufacturing of small batch sizes.
      A threefold prism clamping provides the basis that the toolholder can clamp shaft diameters from 5 to 20 mm precisely. Each of the five chuck jaws is guided by an eroded double prism. A third prism is eroded on the clamping face, which directly contacts the tool shank. Thus the toolholder always adjusts itself to the individual tool diameters. This is an important difference towards conventional solutions, where the clamping face is just circular ground. Even deep hole drillers and tools with a twist, can be machined precisely with the PRISMO.
      During the clamping operation, the five hard material coated chuck jaws intermesh. The build-up, the basic sleeve and the robust design provide a high stiffness to the toolholder. Moreover, the stable guidances reduce a "swing-out" of the grinding wheels. At an overhang length of 2,5 x D and a tool diameter of 20 mm, the PRISMO provides a repeat accuracy of less than 0,005 mm. In order to avoid pollution and to offer a permanently high precision, the PRISMO is rinsed during the grinding operation with clean oil.
      No matter which tool diameter is to be machined, the X-axis of the grinding toolholder remains unchanged. All the chuck jaws persist on the identical axial position. Time-consuming additional programming and the danger of a crash due to incorrect axis offsets, are now in the past.

      ]]>             http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13468 Mon, 01 Mar 2010 08:00:00 GMT <![CDATA[Third SCHUNK Expert Days Service Robotics World-wide network of experts advances service robotics]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13468&country=INT&lngCode=EN&lngCode2=EN
      Complete News:
      On February 24 and 25, 2010, professionals from all over the world met at the third Expert Days on Service Robotics at SCHUNK in Lauffen, Germany, the technology leader in gripping and workholding. This world-wide symposium is considered to be the leading communication platform for applied service robotics. This is due to top-class attendees, which SCHUNK invites every year for this event, and the high dynamics involved by the topic itself. From a small group of thoughtleaders in robotics, an interdisciplinary global network developed, which is preparing the future for robots as a flexible aid in industrial and domestic environments .
      This year, attendees from 22 international companies, research institutes and universities focused on the issues safety, standardization and European initiatives. Moreover, current research studies on "gripping", "mobile manipulation" and "modular robotics" were presented. An accompagnying exhibition showcased current projects, such as the service robot "FRIEND." This is from the research project "AMaRob", which will help disabled humans live independently. The mobile robot platform Scitos, which can freely move and interact with humans.

      Communication platform with well-known experts
      Among the attendees were the Italian specialist on service robotics, Prof. Bruno Siciliano of the University of Napels and Prof. Antonio Bicchi of the University of Pisa. Eric Berger of the United States service robotics company Willow Garage and Prof. Markus Schwarz of the University of Heidelberg, who uses service robotics in the orthopedic and traumasurgery also attended the conference. The symposium was moderated by Prof. Dr. Henrik I. Christensen, "KUKA Chair of Robotics" at the Georgia Institute of Technology in Atlanta, as well as Martin Hägele, the Head of the Department robot systems at the Frauenhofer Institute for Manufacturing Engineering and Automation (IPA) in Germany.
      One observation from the forum was that service robotics are now entering the state of practical applications. This has become more noticeable by the increasing numbers of companies, who have discovered service robotics as a future fieldstudy. The intensive exchange of experience between the participants was obvious, but the lectures given all had top ranking. It is quite evident that all the participants pursue the same goal: They want to develop and market need-oriented applications in service robotics.

      Global network
      In the meantime, some international networks developed from the Expert Days, which exchange knowledge and experiences, and commonly initiate future-orientated projects. From this SCHUNK offers a unique platform. As a pioneer in modular robotics, SCHUNK, the competence leader accompanied the development of service robotics right from the beginning. With its industrial proven mechatronic modules and sophisticated multi-joint grippers, SCHUNK offers a unique molduar system for various applications in service robotics. For example, the LWA 3, is currently the modular light-weight arm with the highest power density on the global market. In almost 100 co-operations with universities, research institutes and highly specialized companies, SCHUNK also advances the development of this future technology.
      For further information on the Expert Days, as well as the individual lectures of the third symposium for applied service robotics, please visit our website expertdays.schunk.com. The fourth Expert Days Service Robotics is planned for February 23 - 24 2011.

      ]]>             http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13372 Mon, 25 Jan 2010 07:00:00 GMT <![CDATA[SCHUNK Laser Technology Laser Welding for a Wide Range of Parts]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13372&country=INT&lngCode=EN&lngCode2=EN
      Complete News:
      SCHUNK presented its highly flexible laser welding machine for the partially automated deposition welding and repair welding of challenging materials and complex component geometries for the first time at Euromold in Frankfurt. The precision machine allows both small components and components weighing several tons to be machined quickly and conveniently. An intelligent teaching and programming function means that even free-form surfaces for which no geometric data exists can be detected quickly. The machine sets new standards in the efficient laser machining of single pieces as well as in small and medium-scale production.
      Detecting free-form surfaces and complicated contours
      The machine's unique teaching and programming function makes it extremely quick to set up and program. A user-friendly look-ahead controller and integrated teaching function for lines, curves, circles and splines significantly reduce the programming time. Even complex parts, parts with surface damage or worn parts are quickly detected in three dimensions without the need for time-consuming external programming. In spline mode, the taught points can be joined together to form a curve, as if they were joined by an elastic band. This shortens the teaching process and ensures that the path is extremely smooth.

      High-precision axes guarantee maximum accuracy
      Thanks to SCHUNK's high-precision linear and rotary axes, the machine is extremely precise and achieves a high degree of repeat accuracy. Adaptive closed-loop control guarantees that the lamp-pumped laser operates precisely and reliably. The laser parameters can be adapted to the specific characteristics of challenging materials using scalable pulse shaping. Particularly when machining cast-iron parts, steel with a high carbon content, and superalloys, users benefit from the overlong 100 ms laser pulse, which significantly improves the weldability of these materials.

      ]]>             http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13369 Mon, 18 Jan 2010 09:00:00 GMT <![CDATA[SCHUNK Expert Days - Service Robotics 2010 Expert forum for the future of service robotics]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13369&country=INT&lngCode=EN&lngCode2=EN
      Complete News:
      The first two Expert Days in 2008 and 2009 were a great success for all the participants. Now SCHUNK, the specialist in toolholding, workholding and automation in Lauffen, Germany, has organized the third Expert Days for service robotics on February 24 and 25, 2010. Experts from all over the world will assemble at this summit. In numerous lectures, which are held in English, the participiants will recieve information on present research projects, trends, and chances for service robotics.
      The lectures of international referees particularly focus on current topics of service robotics: safety, standardization, and European initiatives. Moreover, current research projects in the fileld of gripping, mobile manipulation, and modular robotics will be presented. The forum should be a contribution to identify marketable applications of service robotics.

      Beside an intensive exchange of experience, the Expert Days are an ideal platform for generating international networks all around the globe and to jointly tackle projects for the future. As in years before, two moderators will present the event: Professor Dr. Henrik I. Christensen, holder of the KUKA Chair of Robotics at the Georgia Institute of Technology in Atlanta, as well as Martin Hägele, Head of Department of Robotic Systems at the Fraunhofer Institute for Manufacturing Engineering und Automation (IPA) in Stuttgart. For further information as well as for registration please complete the form online under

      ]]>             http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?11143 Mon, 07 Dec 2009 08:30:00 GMT <![CDATA[ROTA NCK-S plus: Precise and secure holding - day after day]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=11143&country=INT&lngCode=EN&lngCode2=EN
      Complete News:
      The extremely flat precision wedge hook power chuck ROTA NCK-S plus from SCHUNK is an attractively priced clamping solution for stationary applications. High clamping forces and high precision make the chuck an ideal clamping equipment for daily use.
      ROTA NCK-S plus has an integrated hydraulic cylinder, a one-piece hardened chuck body, long jaw guidances and long and precise piston guides. Due to integrated piston lubrication and wear-resistant components, the robust and versatile chuck is also very easy to service.

      For the sizes 165 and 210, the ROTA NCK-S can additionally be equipped with an interface of the SCHUNK UNILOCK quick change pallet system. The ROTA NCK-S plus is available starting immediately in sizes 165, 210, 250 and 315 with two base jaw guidances.

      ]]>             http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13273 Tue, 24 Nov 2009 08:00:00 GMT <![CDATA[Hydraulic expansion Technology in XXXL: Precision devices for large workpieces]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13273&country=INT&lngCode=EN&lngCode2=EN
      Complete News:
      The customized hydraulic expansion toolholders from SCHUNK are an effective way to minimize set-up times and additional costs while still achieving maximum precision. For this purpose, the extremely large hydraulic expansion toolholders and arbors are often adjusted to the users’ special requirements. This ensures that high precision and process reliability can be maintained in the long run. The latest example is an arbor for components with a bore-diameter of 500 mm.
      Stators for large electric motors, gearbox parts for wind power plants, large components for power plants, or the petroleum industry - all of these are clamped quickly and precisely with the micron-precision special solutions from SCHUNK. The experts in toolholding and workholding accompany special orders from the first enquiry to engineering design, through assembly and follow through with subsequent maintenance.

      High precise clamping even of heavyweights
      That even large components can be clamped safely and precisely, proves the present hydraulic expansion arbor in XXXL-size from SCHUNK. The diameter of this arbor amounts to more than 500 millimeters. Instead of clamping claws or large lathe chucks, the arbor assures that the large and heavy workpieces, weighing more than a ton, are precisely held within seconds. It clamps deformation-free and gently with an excellent repeat accuracy of < 0.01 mm - a value which cannot be achieved at this workpiece dimension with other clamping devices. Locating pins additionally assure exact alignment. Mounted on a rotary table, the heavy duty arbor from SCHUNK allows machining with one single set-up.
      Manifold field of applications: Milling, turning, controlling, grinding
      The fields of application for special solutions are very manifold and the spectrum comprises quick-change chucks for machining large gears, applications on lathes, or grinding machines up to sophisticated inspection devices. They are designed specifically for the individual workpieces, machines, and requirements. This makes the willingness possible to find solutions for all the requirements: O.D.- or I.D. clamping, manual or automatic actuation - almost anything is possible.
      ]]>             http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13236 Thu, 19 Nov 2009 09:00:00 GMT <![CDATA[SCHUNK establishes an international subsidiary in Japan]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13236&country=INT&lngCode=EN&lngCode2=EN
      Complete News:
      In January 2009 the Japanese specialist in automation, Takano Bearing Co. Ltd., located in Tokyo, changed its legal name to SCHUNK Intec K.K. The new location in Japan is the 23rd SCHUNK subsidiary worldwide.
      Twenty-five experienced employees work in the "Land of the rising Sun" for SCHUNK. With comprehensive competence in development, engineering design, CAD-system, mechanics, electro technology and control systems, the Japanese team offers well-founded advice, but also numerous types of services.
      With SCHUNK Intec K.K. in Tokyo, the family business from Baden-Württemberg, Germany, reinforces its presence in a country that has a worldwide reputation in the industries of machine building, automotive and robotics. With this step, SCHUNK opens its direct market access to a strong economy and strengthens its activities as well as service possibilities in Asia.
      At the iREX show in November 2009, the new subsidiary will present itself for the first time officially under the name of SCHUNK.


      ]]>             http://www.gb.schunk.com/RSS/news/EN/overview/index.rss?13209 Mon, 09 Nov 2009 10:25:00 GMT <![CDATA[Subsidies and SCHUNK equipment for path-breaking research in robotics]]> http://www.schunk.com/schunk/schunk_websites/news/news_detail.html?article_id=13209&country=INT&lngCode=EN&lngCode2=EN
      Complete News:
      Modern robot applications offer an enormous potential for the economy and society. For this reason the European Union decided, to subsidize the transfer of know-how between research institutions and industry and thus to strengthen it. As a leading expert in automation, SCHUNK already participated in setting up the EU project ECHORD (European Clearing House for Open Robotics Development). Subsidized project groups also receive innovative automation components from SCHUNK at very affordable prices.

      ECHORD is an EU-funded project in the field of robotics, which should strengthen the European-wide cooperation between science and industry. The volume of financial subsidies amounts to a total of 24 million Euros. By the end of 2012, there will be altogether three invitations for proposals, for which European industrial enterprises and research groups may participate and the entry process is relatively easy.
      Ideally one to three partners should participate at an individual project and the maximum volume amounts to 300,000 Euro. Up to one third of the subsidy amount can be spent for hardware from the so-called ECHORD fund. With its long lasting research experiences in the main sectors of priority of the funded project, SCHUNK supports the project groups with know-how, but also with hardware. Those who want to profit from ECHORD, may participate at the first invitation of tender beginning December 1, 2009.

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