| 摘要 |
PROBLEM TO BE SOLVED: To reduce vibration of a wire electrode, to improve the linearity of machined surface of a workpiece, and to restrain the generation of streak in a step part which suddenly changes in thickness of the workpiece. SOLUTION: The wire electric discharge machining is performed by repeating the cycle including: a state between the workpiece and a wire electrode detecting step of detecting the state by applying search voltage from a search pulse output part 19 to a space between the workpiece and the wire electrode; a discharge machining step of applying machining pulse voltage from a main pulse output part 21 to the space after discharge in the space is detected by a detecting part 23; and a discharge pause step of pausing the voltage application to the space during a predetermined pause time after the discharge machining step. In this discharge machining step, machining pulse voltage is applied as a plurality of discrete pulses to the space. COPYRIGHT: (C)2008,JPO&INPIT
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