Home > Adaptive shape gripper DHEF by Festo picks up anything

Adaptive shape gripper DHEF by Festo picks up anything

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article image Festo’s DHEF adaptive shape gripper

The adaptive shape gripper DHEF from Festo is designed to pick up, gather and set back down objects of different shapes without the need for manual adjustment. Similar to how a chameleon's tongue grips insects, the DHEF adaptive shape gripper uses a silicone cap to precisely adapt to a wide range of geometries. The elastic silicone cap can fold itself over and grip objects of virtually any shape, creating a firm, form-fitting hold. When combined with a pneumatic drive, the adaptive shape gripper requires minimal energy for a secure grip.

Formless, round, sensitive

Conventional mechanical grippers available on the market can only grip specific components; however, the adaptive shape gripper stands apart for its extreme flexibility. It can even manage components with freely formed shapes and round geometries. The absence of sharp edges makes it ideal for gripping sensitive objects such as air nozzles or trim strips. In principle, the gripper can pick up several parts in one movement, for example, nuts from a bowl.

This means that the bionic gripper can be used to handle small parts in classic machine building, in the electronic or automotive industry, in supply units for packaging installations, for human-robot interaction during assembly tasks or for prosthetic extensions in medical technology.

Practical product characteristics

The gripper has an elastic silicone membrane that is flexible and pliable. Once it is supplied with compressed air and the standardised robot interface with integrated air connections has been added, it is ready to be used as a practical automation component. The standard sensor slot for position sensing and the bayonet lock for easy replacement of the cap are additional useful features.

Inspired by Nature

The unique combination of force and form fitting of the chameleon's tongue can be observed when it is on the hunt for insects. Once the chameleon has its prey in its sights, its tongue shoots out like a rubber band. Just before the tip of the tongue reaches the insect, it retracts in the middle whilst the edges continue to move forwards. This allows the tongue to adapt to the shape and size of the prey and firmly enclose it. The prey sticks to the tongue and is pulled in as though caught on a fishing line. The Festo Bionic Learning Network with researchers from the University of Oslo used these observations when developing a prototype named ‘FlexShapeGripper’.

For more information, please visit www.festo.com/dhef.

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