Basic study on pulse generator for micro-EDM

ORIGINAL ARTICLE

Abstract

An RC pulse generator can easily generate a pulse on-time as short as a several dozen nanoseconds in micro-electro-discharge machining (micro-EDM), but its discharge frequency is low due to the time needed to charge the capacitor in micro-EDM, which has a strong negative effect on the pulse generator’s working efficiency. Therefore, a new transistor-type isopulse generator has been developed for micro-EDM in this research. Evaluation of the machining characteristics proved that the transistor-type isopulse generator is suitable for micro-EDM. The experimental results reveal that the transistor-type pulse train generator is unsuitable for micro-EDM due to its low removal rate: 80-ns and 30-ns pulse on-times of discharge current can be obtained by using the transistor-type isopulse generator developed in this research, and the removal rate of this generator is two or three times higher than that of the traditional RC pulse generator.

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References

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Copyright information

© Springer-Verlag London Limited 2006

Authors and Affiliations

  • Fuzhu Han
    • 1
  • Li Chen
    • 2
  • Dingwen Yu
    • 1
  • Xiaoguang Zhou
    • 2
  1. 1.State Key Laboratory of Tribology, Department of Precision Instruments & MechanologyTsinghua UniversityBeijingPeople’s Republic of China
  2. 2.Department of AutomationBeijing University of Posts & TelecommunicationBeijingPeople’s Republic of China

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