Wire-cut electric discharge machining.

摘要

During machining of a work 20, the feed of the wire electrode 30 and the discharge for the machining are stopped and the wire electrode 30 is moved in a direction X perpen- dicularto the machining path until it gets into contact with the wall of the work 20. The size δ of the spark gap is detected from the position where the wire electrode 30 makes contact with the work 20. A desired offset value is calculated from the detected size δ of the spark gap and the preknown wire diameter d. The machining path is corrected so thatthe center of the wire electrode 30 may lie at a position offset by the desired offset value relative to a profile desired to obtain.