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The Detection and Control of Discharge-state in Ultrasonic Vibration Electrical Discharge Milling

Zhu Tao,Zhang Jianhua,Chang Weijie,Wang Tao(Shandong University,Jinan 250061,China)  
The state detection has significant effect on the machining stability,efficiency and accuracy of ultrasonic vibration electrical discharge milling.One of the gap voltage detection circuits was used to obtain the real-time waveform of the voltage between workpiece and tool electrode.The pulse voltage values from the voltage waveform were compared with three threshold voltages set by the computer,then open pulse,spark pulse,non-normal pulse could be identified.The effective method can be used to establish an on-line control system.
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