Patent ID: 9707638
Date: 2017-07-18
CPC Classifications: B23H

Claim:
1. A wire electric-discharge machining device comprising: a cutting wire part including a plurality of cutting wires that are arranged parallel to each other so as to face a workpiece by winding a wire electrode around a plurality of guide rollers; a drive unit that controls a relative distance between the workpiece and the cutting wire part; a pulse-voltage generation unit that applies a pulse voltage between the workpiece and the cutting wires; and an angle measurement unit that measures an inclination angle of an end face of the workpiece with respect to a plane perpendicular to a driving direction of the drive unit, wherein the cutting wire part is arranged so as to be parallel to the plane perpendicular to the driving direction of the drive unit, and the pulse-voltage generation unit selects a cutting wire from the plurality of cutting wires to which the pulse voltage is applied on a basis of the measured inclination angle.