Method of making partially welded spots in wire-cut electrical discharge machining

Abstract

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