WIRE ELECTRIC DISCHARGE MACHINING METHOD

摘要

A wire electric discharge machining method capable of carrying out a machining in a first step and a cutting in a second step using one machining program comprising the steps of setting and inputting programs for machining routes for cutting respective male molds (A1 to A3), an accumulation alpha and a reverse amount beta , stopping an electric discharge machining so as to leave the accumulation alpha in a first machining and storing a position where the machining is stopped, and carrying out in a second step an automatic wire connection at a wire connecting position that is way back along a machining groove by the reverse amount beta from the machining stop position in the first step and cutting the respective male molds (A) by effecting electric discharge machining from the wire connecting position. A wire electric discharge machine comprises an annealing/fusing device that anneals and fuses the wire by heating the wire with a current supplied to the wire, whereby linearity is provided to a wire by annealing and a semi-spherical configuration is provided to a wire leading end by fusion, thereby making it possible for a wire to easily be introduced into the machining groove at the wire connecting position.