A wire-cut, electric-discharge machining power source which is provided with a first low-current discharge circuit and a second high-current discharge circuit. The first low-current discharge circuit makes a wire electrode positive and a workpiece negative, and the second high-current discharge circuit makes the wire electrode negative and the work positive. After triggering a discharge by the first low-current discharge circuit, a main discharge for machining is produced by the second high-current discharge circuit.

Wire cut electric discharge machining power source

A power source for wire-cut electric discharge machines which is designed to increase the cutting speed and improve the surface roughness of a workpiece. A capacitor for supplying a discharge energy across a wire electrode and the workpiece is always by a DC power supply and the charged voltage across the capacitor is applied across the machining gap via a switching element. The switching element is turned ON when the voltage across the capacitor reaches a predetermined level, and turned OFF when the voltage becomes substantially zero, permitting rapid charging of the capacitor and the generation of a uniform discharge energy.

Power source for wire-cut electric discharge machines

A method and a device for machining a work-piece by means of spark erosion are described, in which a breakdown is produced in a discharge space formed by the work-piece and a tool electrode which are connected to a supply source. It is shown that the current density in the discharge space may be maintained substantially constant by switching a stabilized voltage source across the discharge space at the instant of breakdown.

Adriaan Abraham Van Der Veeke

Papers

Spark erosion constant current density method of machining a work piece by means of