Rapid Production of a Thin Electrode by a Single Discharge Machining (1st Report)

Hideki TAKEZAWA; Naotake MOHRI; Katsushi FURUTANI

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Rapid Production of a Thin Electrode by a Single Discharge Machining (1st Report)

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Recently, electrical discharge machining (EDM) has been applied to micro processing. A thin electrode less than 0.1mm in diameter has been used for the micro EDM. In conventional micro EDM, minute energy is supplied to the gap region for micro removal machining. In this study, we carried out some experiments on single discharge machining with thin electrode. The value of discharge current was selected up to 50A as the machining condition. The electrode wear length was measured for several pulse durations. As a result, we found out the electrode became thinner than original diameters at the edge portion under pulse duration of several hundred #mu#s in a single discharge. A needle of 35#mu#m in diameter and 300#mu#m length can be made instantaneously from a tungsten wire of 0.125mm in diameter. Using a thin electrode, micro drilling could be performed on the machine. The rapid thin electrode production mechanisms are discussed taking into consideration of electromagnetic force, electrostatic force and plasma jets flow.

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《精密工学会誌》 |2001年第8期|1299-1303|共5页
作者
Hideki TAKEZAWA; Naotake MOHRI; Katsushi FURUTANI;
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中图分类机械制造工艺;仪器、仪表;
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a single discharge machining; a thin electrode; electrode wear length; micro drilling;

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Rapid Production of a Thin Electrode by a Single Discharge Machining (1st Report)

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