Patent ID: 9050672
Filing Date: 2015-06-09
Classification: B23H,B28D

Abstract:
1. A wire discharge-machining apparatus comprising: a wire electrode set as cutting wires provided in parallel with a distance therebetween and facing a workpiece; a machining power source that generates a machining voltage; and a plurality of feeder units that are electrically connected to the cutting wires respectively of the wire electrode and supply the machining voltage between the cutting wires and the workpiece respectively, wherein the plurality of feeder units are arranged at both sides of the workpiece, the both sides including a first side and a second side, at least one feeder unit on the first side and at least one feeder unit on the second side are connected to respective power feeder lines from the machining power source, in the cutting wires, the feeder units are arranged such that a direction of a current passed to at least a part of the cutting wires becomes a direction different from a direction of a current passed to other cutting wires, and the feeder units are provided on the first side and the second side for each of the cutting wires, and the machining voltage from the machining power source is connected to only one of the feeder units on either side of each of the cutting wires to thereby supply the machining voltage between the cutting wires and the workpiece.