Patent ID: 6389942
Filing Date: 2002-05-21
Classification: B21F,B23D,B23H,Y10S,Y10T

Abstract:
A wire cutting device for use in a wire cut electric discharge machine for cutting spent wire electrode used to generate an electric discharge, said device comprising:a drive gear having an axis of rotation and peripheral teeth extending in the direction of the axis of rotation; a follower gear meshed with the drive gear whereby a rotational force is transmitted to the follower gear by the drive gear, said follower gear having an axis of rotation and a peripheral teeth extending in the direction of the axis of rotation; the axis of rotation being shiftable relative to the axis of rotation of the drive gear; a bias means for pressing the follower gear against the drive gear; a wire take-up positioned to take-up spent wire electrode and feed the spent wire electrode between the drive gear and the follower gear; and a drive means for driving the gear such that the peripheral speed of the drive gear is higher than the speed at which the spent wire electrode is fed from the wire take-up.