| 摘要 |
A wire electric discharge machining method of machining the workpiece with different thickness into a required shape with first cut and second cut. The method includes the steps of (a) detecting a position of the wire electrode relative to the workpiece, (b) detecting change in thickness of the workpiece during first cut, (c) storing the position of wire electrode as a thickness change position (Q1) when change in thickness of the workpiece from a first thickness (t1) to a second thickness (t2) is detected, (d) forming a zone (alpha) around the thickness change position, (e) comparing the position of wire electrode to the zone during second cut, and (f) changing at least one machining condition during times when it is determined that the wire electrode is positioned in the zone.
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