Seibu Electric Machinery Co., Ltd.

Masatoshi Kawano

Takashi Mitsuyasu

Keisuke Tasaki

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. The process includes 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, a step goes ahead to one of next procedures, and after the wire electrode has come into no contact with the welded spot, a step goes ahead to generate an alarm and the wire electrical discharge is ceased.

Process for identifying existence of partially welded spots and retention of cut-out part in wire-cut electrical discharge machining

In a method of welding a cut-out part with a workpiece at a preselected area in a thickness direction of the workpiece in a wire electrical discharge machining to retain temporarily or tentatively the part on the workpiece, a wire electrodetilted in posture cuts the workpieceto form a slant cutting surfaceat a spark discharge location in a desired contourin the workpiece. The wire electrodeafter kept in an upright posture executes the welding process on the workpiecealong the slant cutting surface. A plurality of the welded spots is formed over a preselected length at preselected areas in the thickness direction of the workpiece. Even if the cut-out partweighs more or the spark discharge is executed on the workpieceoverlapped one on the other, the welding spotis formed in the thickness direction of the workpieceadequately depending on the working situation to tentatively retain the cut-out parton the workpiece

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Fukuoka-ken, Japan

Masatoshi Kawano