2020/05/18
ID: 2923

The automated chameleon tongue

The adaptive shape gripper DHEF by Festo can pick up anything

Gripping workpieces just as a chameleon's tongue grips insects – that is the operating principle of the adaptive shape gripper DHEF from Festo. This unusual gripper can pick up, gather and set back down again objects of many different shapes without the need for manual adjustment.

The silicone cap of the adaptive shape gripper DHEF can fold itself over and grip objects of virtually any shape. This creates a firm, form-fitting hold. The elastic silicone enables the gripper to precisely adapt to a wide range of geometries. When combined with a pneumatic drive, the adaptive shape gripper requires little energy for a secure grip.

 

Formless, round, sensitive

Unlike the mechanical grippers currently available on the market that can only grip specific components, the adaptive shape gripper is extremely flexible. 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 as well as the bayonet lock for easy replacement of the cap are additional useful features.

 

Nature as a model

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 with the name "FlexShapeGripper".

À propos de Festo :

Festo est un acteur mondial et une entreprise familiale indépendante dont le siège est à Esslingen am Neckar, en Allemagne. La société fournit des technologies d'automatisation électrique et pneumatique à 300 000 clients de plus de 35 industries manufacturières et de process. Les produits et services sont disponibles dans 176 pays. Avec environ 21 000 employés dans plus de 250 succursales de 61 pays à travers le monde, Festo a réalisé un chiffre d'affaires de 3,07 milliards d'euros en 2019. Chaque année, environ 8% de ce chiffre d'affaires est investi dans la R&D.

Dans cette entreprise tournée vers l’apprentissage, 1,5% du chiffre d'affaires est investi dans la formation initiale et continue. De plus, les services de formation ne sont pas uniquement fournis au personnel Festo : le département Didactic propose également des programmes de formation de base et de perfectionnement dans le domaine de la technologie d'automatisation pour les clients, les étudiants et les stagiaires.

© Festo SE & Co. KG
Pince adaptative DHEF 1
Pince adaptative DHEF : comme la langue d'un caméléon, elle saisit de manière fiable les objets irréguliers, ronds et sensibles. La pince Festo a remporté le prix iF Design Award et le Red Dot Design Award de renommée internationale pour ce...
© Festo SE & Co. KG
Stefanie Seiler and Nenja Rieskamp
Stefanie Seiler (Product Management, on the left) und Nenja Rieskamp (Product Development).

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