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| Characteristics of Micro EDM Discharge State and Its Identification Method |
| LIU Xiaomeng, BAI Jicheng |
| (School of Mechanical and Electrical Technology, Harbin Institute of Technology, Harbin 150001, China) |
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Abstract Accurate identification of micro-EDM discharge state is an important guarantee for high-precision and
high-efficiency machining. However, the micro-EDM pulse energy is small, the discharge frequency is high, the process is
random, which seriously affect the identification accuracy of discharge state. In order to solve this problem, the characteristics
of micro EDM discharge state are studied, and the reasons of each discharge state are analyzed. At the same time, the
discharge state is identified according to the difference in the discharge state characteristics. By setting the inter-electrode
voltage threshold, the inter-electrode current threshold and the spectral threshold, the accurate and effective identification of
the no-load state, the spark discharge state, the stable arc state and the pulse interval is realized, thus providing the basis for
efficient servo control.
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2017, 
