Patent ID: 6815630
Filing Date: 2004-11-09
Classification: B23H

Abstract:
A wire electric discharge machine in which a traveling direction of a wire electrode is changed by a lower roller arranged at a lower portion of a workpiece, the wire electrode is held and pulled by a capstan roller and pinch roller, electric power for machining is supplied between the wire electrode and the workpiece while the wire electrode is traveling so that the workpiece is machined by electric discharge energy, and the wire electric discharge machine is provided with a wire cutter for cutting a used wire electrode used in the process of electric discharge machining,the wire electric discharge machine characterized in that: the capstan roller and the pinch roller are arranged so that direction changing angle &thgr; of the wire electrode, by which the traveling direction of the wire electrode is changed by the capstan roller and the pinch roller, can be 0Â°