The wire traction microgripper design and experiments for stereo light microscope

Article type: Research Article

Authors: Wang, Yuezong^a | Ma, Guodong^{a; *} | Zhang, Chenchen^a

Affiliations: [a] College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing, China

Correspondence: [*] Corresponding author: Guodong Ma, College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China. Tel.: +86 010 6739 2072; E-mail: mgdlove@163.com

Abstract: An electromagnetic-driven microgripper is designed for the automatic process of gripping micro-coil wire under the guidance of Stereo Light Microscope (SLM) visual system. The diameter of the wire is about 50–70 μm. Stress analyze with the ANSYS simulation software helps to obtain stress and safety factor contours of the upper and lower clamp arm when the microgripper grips wires. Simulation results show the correctness and reliability of the design. The microgripper clamping force is up to 0.9 N by theoretical calculation. Test results show that this gripper achieves a displacement of 1.1 mm. Functional test for the wire traction microgripper has been done under the guidance of SLM visual system. The wire traction microgripper is placed in three-dimensional platform, and the three-dimensional platform moves microgripper in the SLM object space close to the clamped object. Positioning accuracy error is determined by repeated positioning precision experiments on three-dimensional platform by the laser displacement sensor. Automatic process of gripping the micro-coil wire is observed and recorded in the SLM visual system to verify performance of the microgripper structure design.

Keywords: Electromagnetic-driven, microgripper, ANSYS simulation, stress analysis

DOI: 10.3233/JAE-140056

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 47, no. 2, pp. 389-397, 2015