Basic study on pulse generator for micro-EDM |
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Authors: | Fuzhu Han Li Chen Dingwen Yu Xiaoguang Zhou |
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Affiliation: | (1) State Key Laboratory of Tribology, Department of Precision Instruments & Mechanology, Tsinghua University, Beijing, 100084, People’s Republic of China;(2) Department of Automation, Beijing University of Posts & Telecommunication, Beijing, 100084, People’s Republic of China |
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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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Keywords: | |
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