EDM at Low Open-Circuit Voltage

K. Egashira, K. Mizutani
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引用次数: 41

Abstract

The possibility of EDM at open-circuit voltages of lower than 30V has been examined using an RC circuit, because low voltages are preferable in terms of machining accuracy; however, machining at such voltages had not been attempted before. EDM of holes in copper is carried out with tungsten electrodes of 15μm or 7μm diameter to investigate the machining rate. At open-circuit voltages of 5V or higher, the average electrode feed speed, which is defined as the feed per machining time, is higher than 5μm/min under certain electrical conditions. Although the machining rate is very low, machining is possible even at an open-circuit voltage of 2V. These voltages are much lower than those usually used for EDM. A tungsten rod of 1μm diameter can be fabricated at an open-circuit voltage of 20V by wire electrodischarge grinding (WEDG), indicating the possibility of future applications of EDM to submicron machining and nanomachining.
低开路电压下的电火花加工
在低于30V的开路电压下进行电火花加工的可能性已经使用RC电路进行了测试,因为在加工精度方面,低电压是优选的;然而,在这样的电压下加工以前没有尝试过。采用直径分别为15μm和7μm的钨电极对铜孔进行电火花加工,考察加工速率。在开路电压为5V或更高时,在一定的电气条件下,电极的平均进给速度(定义为每个加工时间的进给速度)高于5μm/min。虽然加工速率很低,但即使在2V的开路电压下也可以进行加工。这些电压比通常用于电火花加工的电压低得多。在20V开路电压下,利用电火花加工技术可以加工出直径为1μm的钨棒,这表明电火花加工技术在亚微米加工和纳米加工中的应用前景广阔。
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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