Direct Observation of Multiple Discharge Phenomena in EDM using Transparent Electrodes

抄録

 In this paper, multiple discharge phenomena in electrical discharge machining were observed directly through a transparent electrode using a high speed video camera. Multiple discharges occurred with a probability of about 2% in a steady state of normal sinking EDM. The probability was high when the gap width between electrodes was narrowed by the servo feed control and where debris particles were densely-distributed. Moreover, we investigated the change in gap voltage and discharge current waveforms and relative distance between the locations of consecutive discharges, when multiple discharges occurred.