The power-supply unit which possesses the power circuit for process of type which is multiple of switching arrangement

摘要

PROBLEM TO BE SOLVED: To provide a switching device of an electric discharge machining power supply circuit, lowering the contact resistance to reduce the generation of heat, enhancing the peak of a discharge current, effectively applying and disposing a cooling mechanism to the switching device, and efficiently functioning even in the case of application to high-load.;SOLUTION: A cylindrical box body is parted at the central area in the axial direction, and connected by a combination of conductors to form a cylinder chamber on both sides. Both cylinder chambers are provided with a piston with a piston rod, respectively opposite to both sides of the combination, and the respective opposite surfaces of the piston and the combination are provided with a tapered projection and a tapered hole which are pressurized to fit each other and turn on and separated from each other to turn off by the forward and backward movement of the piston. The outer peripheral side of the combination and the rear end of each piston rod are provided with terminals of electric lead connection.;COPYRIGHT: (C)2006,JPO&NCIPI