• Schunk Intec India Private Limited

Gripping Modules, Long-Stroke

Schunk’s CGH long-stroke Gripper is a milestone in handling: for the first time the company, a competence leader for clamping technology and gripping systems, succeeded in standardising a light-weight gripper with CFC housings. The versatile module convinces in terms of energy-efficiency and economic efficiency. It helps to increase dynamics of existing systems, or enables the use of smaller robots. The CGH light-weight gripper is the result of modern simulation methods, intensive test series, and economic manufacturing processes. The long-stroke gripper benefits from the specific material characteristics of CFC: Its E-value is four times higher, and its tensile force is twice as high as of aluminium. The gripper weight has been reduced about 40%. In order to take complete advantage of the composite fibre technology, and to ensure high stability of the gripper, the Schunk development engineers have manufactured the gripper housing according to the specific stress requirements, and used the RTM process. The result is a light and rigid gripper, which has a correspondingly torsional stiffness. At a weight of 11.7 kg, the CGH disposes of a gripping force of 2,500 N, and a variable stroke per gripper finger of up to 160 mm. The gripper can dynamically handle work pieces up to 12.8. The decoupled re-circulating ball carriages ensure that the acting moments will be optimally distributed onto the whole rolling elements. This way an enormous efficiency is achieved: About 90% of the used energy arrives at the finger. Via quantity and distance of the guide carriages, the module can be exactly adjusted to the individual load. For particularly high gripping forces, or very long fingers, the distance between the carriages is increased. Therefore it is possible to use even fingers with a length of more than 1,000 mm, and approximately the same clamping forces will act along the whole finger length. For further increase of the gripper’s efficiency, the stroke can be scaled at damped end positions. The positions “open“ and “closed“ are adjusted according to the requirements, and the complete cylinder does not have to be aerated and de-aerated at every cycle. This minimises cycle times, and also reduces compressed air consumption. The scope-free belt-drive and the synchronized fingers ensure that the gripper is also working precisely in case of varying strokes, where small and big components can be alternately handled. Various robots can be directly adapted via an ISO flange. The company also offers Small Parts Gripper, EGP, Collision Protection Device, Fast Reacting, Clamping Tools/Holding Systems, Clamping Device, Proximity Switch, 2-IN-1, etc.