Combined voltage control power source of wire cutting machine tool

The utility model discloses a combined voltage control power source of a wire cutting machine tool. The combined voltage control power source of the wire cutting machine tool comprises an upper computer, a central processor, a logic control module, a hand control box, a shaft drive and a relay, wherein the upper computer is connected with the logic control module through the central processor, the logic control module is connected with the shaft drive, the relay and the hand control box to realize mutual data interaction, and machining waveforms are output to an electrode according to settings; the machining waveforms include breakdown high voltage, work voltage and negative voltage, the breakdown high voltage is used for realizing effective breakdown rapidly after machining begins, the work voltage is used for providing main energy to cut workpieces after breakdown, and the negative voltage is used for eliminating an ionization phenomenon in the machining process. The combined voltage control power source of the wire cutting machine tool is high in discharging efficiency, short in machining time, and capable of effectively reducing wool loss, prolonging the service life of wood wool, eliminating the ionization phenomenon in the machining process, effectively improving smoothness, and reducing the phenomena of arc discharge, short-circuit and the like.