At first glance, the Bionic Handling Assistant looks like a pliable gripper arm with a structure and overall function modelled on an elephant’s trunk. Our researchers also use the system as a development platform that combines a wide variety of technologies and components.
The Bionic Handling Assistant offers free-moving and pliable operation. It is even safe where there is direct contact between the machine and humans. In the event of a collision, the pneumatic bellows structure gives way immediately and therefore does not have to be carefully shielded from humans like conventional robots. The assistance system was awarded the German Future Prize for this achievement in 2010.
The gripper of the Bionic Handling Assistant consists of three adaptive fingers with an operating principle that also originates from the animal world. Like the fish fin, the structure with Fin Ray Effect® does not bend away under lateral pressure – instead, it curves around the pressure point. This means that the fingers close gently around the material being gripped and enable fragile and differently shaped items to be handled without being damaged.
The Bionic Handling Assistant is thus providing new approaches to the question of how humans and technology can interact easily, efficiently and, above all, safely in the factory of tomorrow.
Both the gripper and the bellows structure of the gripper arm are made of polyamide using the selective laser sintering process (SLS). The generative production method allows engineers to design individual movable system parts that are difficult to achieve with conventional technologies.
At the beginning, the material is in powder form and is applied to a construction platform in thin layers during the production process. Each layer is fused to the underlying layer with a laser and only cured where the program requires it. In cavities, the powder does not harden and can therefore be removed later. This enables individual 3D printing of complex products and designs.