A new silicon microgripper actuated by SMA wires was designed and manufactured. The structure is equivalent to a four bar linkage, but, to realize the movements, instead of an hinge or a compliant hinge, it uses the compliance of the beams. The microgripper jaw has a parallel movement and it is activated by a SMA wire having a diameter of 37 μm. The wires are arranged in such a way to obtain an amplification of the movement and to give origin only to the gripping force, on the articulated beams, without generating other load components like compression, avoiding instability for the same beams. The closure stroke is ranging from 200 μm to 500 μm. Overall dimensions are 7.8 mm × 21 mm × 1 mm. The structural design was made using extensively Finite Element Modeling. The silicon used is 100 monocristalline type. The gripper was manufactured using microcutting copper vapour laser technology.

Silicon Microgripper driven by Shape Memory Alloy Actuators

BEOMONTE ZOBEL, Pierluigi;DURANTE, FRANCESCO
2004-01-01

Abstract

A new silicon microgripper actuated by SMA wires was designed and manufactured. The structure is equivalent to a four bar linkage, but, to realize the movements, instead of an hinge or a compliant hinge, it uses the compliance of the beams. The microgripper jaw has a parallel movement and it is activated by a SMA wire having a diameter of 37 μm. The wires are arranged in such a way to obtain an amplification of the movement and to give origin only to the gripping force, on the articulated beams, without generating other load components like compression, avoiding instability for the same beams. The closure stroke is ranging from 200 μm to 500 μm. Overall dimensions are 7.8 mm × 21 mm × 1 mm. The structural design was made using extensively Finite Element Modeling. The silicon used is 100 monocristalline type. The gripper was manufactured using microcutting copper vapour laser technology.
978-0-87170-834-2
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/35266
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