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Development and Application of a Precision Micro EDM System

[+] Author Affiliations
Gang Li, Rui Guo

Harbin Institute of Technology, Harbin, China

Wansheng Zhao

Shanghai Jiao Tong University, Shanghai, China

Paper No. MNC2007-21088, pp. 1205-1210; 6 pages
doi:10.1115/MNC2007-21088
From:
  • 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems
  • First International Conference on Integration and Commercialization of Micro and Nanosystems, Parts A and B
  • Sanya, Hainan, China, January 10–13, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4265-7 | eISBN: 0-7918-3794-7
  • Copyright © 2007 by ASME

abstract

This paper presents the development of a micro-EDM system which is aimed to improve micro machining capability. The system consists of high precision X-Y-Z stages with quick response, a high precision granite machine body, a pulse power generator, a CCD microscopic computer vision system, etc. The X-Y-Z stages are driven by ultrasonic linear motors with a resolution as high as 0.05 μm. The granite machine body can reduce stray capacitance and absorb vibrations. RC pulse power generator can supply discharging energy as small as 10−9 J. Micro electrode can be measured with a resolution of 1.6 μm by the microscopic computer vision system online. In order to machine precision 3D microstructures, a special CAM software package based on the commercial CAD/CAM software Unigraphics (UG) is developed to generate tool path and NC codes and compensate the electrode wear. Experiments carried out on this machining system show that micro shafts with a minimum diameter of 6 μm and micro holes of 10 μm in diameter can be obtained stably. With the aid of the self-developed CAM software packages, complicated 3D microstructures are machined on this micro-EDM machining system.

Copyright © 2007 by ASME

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