WIRE ELECTRIC DISCHARGE PROCESSING MACHINE WITH RUST PREVENTING FUNCTION

摘要

An electric discharge processing machine applies a voltage to a processing subject and a corrosion preventing electrode so as to prevent the corrosion of the processing subject. A reference current value which is proportional to the surface area of the processing subject is set so that a current density is maintained constantly, and a voltage of a corrosion preventing power supply is controlled so that a corrosion preventing current falls within a predetermined range.

主权项

1. An electric discharge processing machine with a corrosion preventing power supply unit in which a processing subject and a tool electrode are made to face each other through a processing liquid, a voltage is applied to the processing subject and the tool electrode so as to process the processing subject, and a voltage is applied to the processing subject and a corrosion preventing electrode provided inside the processing liquid, the electric discharge processing machine further comprising:
a corrosion preventing power supply voltage value changing unit that changes the application voltage of the corrosion preventing power supply unit so that the density of the current flowing to the processing subject is constantly maintained.