Effect of Bubble Coalescence on Material Removal Rate in Electrical Discharge Machining Process

Shinya Hayakawa, S. Yamada, F. Itoigawa, Takashi Nakamura, T. Kitamura, M. Yamanaka
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引用次数: 3

Abstract

This paper investigates the ease of bubble coalescence of the machining liquid and the medium at the discharge ignition location in electrical discharge machining (EDM) process in order to discuss the effect of the properties of the machining liquid on the material removal rate. Bubble coalescence, which is one of the properties of a machining liquid, was observed using a video camera, and the medium at the discharge ignition location, i.e., whether a discharge occurs in EDM oil or in bubbles, was determined using a characteristic of the waveform of the discharge current. It is found for a continuous EDM process that a high proportion of discharges occur near the boundaries of previously existing bubbles, whereas few discharges occur in the interior of bubbles. It is also found that reducing the bubble coalescence will improve the material removal rate.
电火花加工中气泡聚结对材料去除率的影响
研究了电火花加工过程中放电点处加工液与介质的气泡聚结性,探讨了加工液性质对材料去除率的影响。利用摄像机观察了加工液的特性之一气泡聚结现象,并利用放电电流波形的特性确定了放电点处的介质,即放电是发生在电火花加工油中还是发生在气泡中。在连续电火花加工过程中,高比例的放电发生在先前存在的气泡边界附近,而很少的放电发生在气泡内部。减少气泡聚结可以提高材料的去除率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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