PURPOSE: To high efficiently perform electro-chemical electric discharge machining, by duplicating an electric discharge machining pulse-state power source to an electro-chemical machining power source.
CONSTITUTION: An electro-chemical machining power source 12 and electric discharge machining power source 13 are applied between an electrode 1 and work 2 to simultaneously perform both electro-chemical machining and electric discharge machining while flowing electrolytic machining fluid 3. The electro- chemical machining power source 12 generates a flat output waveform, while the electric discharge machining power source 13 generates an output waveform having pulse width from about 0.1μs to several ms. As a result from these duplication, actually applied output between the electrode 1 and the work 2 is a constant voltage electro-chemical machining power source as viewed from electro- chemical machining, and a large current increases a machining amount as compared with a single-phase full-wave power source, while high voltage is applied as viewed from electric discharge machining, and an electric discharge is easily caused, further an arc discharge is cut off because of a pulse-state discharge waveform, thus a continuous arc discharge phenomenon can be avoided.
ORIMOTO SAHEI
UCHIDA MASAHIRO
IIZUKA NOBUYUKI
