局所電界重畳による放電加工の放電位置制御

概要

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This paper proposes a method to control the discharge location in the electrical discharge machining. The method is based on the fact that when a high-voltage is applied with a sufficiently short rise time at a certain point on the tool electrode the gap voltage close to the point is transiently greater than that of another location because a finite time is necessary for the potential to be transmitted through electrically conductive materials due to inductance. This principle was applied to the wire electrical discharge machining (WEDM) and the discharge location was controlled by superimposing a high-voltage on either the upper or lower feeding brush. Experimentally it was verified that the discharge location can be controlled using this method and that the material removal rate can be increased by dispersing the discharge location on purpose.
1999-10-05