PROCESS FOR IDENTIFYING EXISTENCE OF PARTIALLY WELDED SPOTS AND RETENTION OF CUT-OUT PART IN WIRE-CUT ELECTRICAL DISCHARGE MACHINING

摘要

A process for identifying existence of a welded spot on a cut-out part and retention of the cut-out part on a workpiece in a wire electrode is disclosed which makes it possible to go ahead process steps while identifying automatically the retention of the cut-out part on a workpiece, ensuring unmanned work of the wire electrode discharge processor with saving the personnel and labor. The process comprises a rough cutting step to cut out the part from the workpiece, a welding step to partially weld the part with the workpiece, and an inspection step to detect whether the wire electrode comes into contact with a welded spot while moving the wire electrode along the cutting path of kerf in the workpiece. After the wire electrode has come into contact with the welded spot whereby the retention of the part on the workpiece has been identified, a step goes ahead to one of next procedures. On the other, after the wire electrode has come into no contact with the welded spot whereby no retention of the part on the workpiece has been identified, a step goes ahead to generate an alarm and the wire electrical discharge is ceased.