Patent ID: 9452482
Filing Date: 2016-09-27
CPC Classification: B23H

Claim Text:
1. An electrical discharge machine in which a workpiece is arranged while a wire electrode is moved from an upper support part to a lower support part and the workpiece is chipped away by an electric discharge generated between the wire electrode and the workpiece, the electrical discharge machine comprising: the lower support part provided to a tilt shaft rotatable and extending horizontally; and the upper support part provided to a forward/backward shaft extending parallel to the tilt shaft from a support column provided vertically to the tilt shaft and movable forward and backward in the extending direction, wherein the lower support part includes a lower guide roller that rotates in a tilting plane in which the tilt shaft, the support column, and the forward/backward shaft lie, the upper support part includes an upper guide roller that rotates in the tilting plane in which the tilt shaft, the support column, and the forward/backward shaft lie, the wire electrode is suspended around the upper guide roller and the lower guide roller, and the upper support part includes a swing lever that tilts parallel to the rotation plane of the upper guide roller and is pivotally attached to a rotation shaft of the upper guide roller, a nozzle that supplies liquid of a dielectric to the wire electrode and is provided to one end of the swing lever, and a rod of a cylinder that is pivotally supported to the forward/backward shaft and is pivotally attached to another end of the swinq lever.