Patent ID: 6291789
Filing Date: 2001-09-18
Classification: B23H

Abstract:
A wire electrical discharge machine comprising:a wire electrode for causing electrical discharge to take place between the wire electrode and a workpiece;a first roller and a second roller for feeding said wire electrode while nipping the wire electrode;a wire conveying means for inserting said wire electrode into a portion between said first roller and said second roller by causing a fluid to flow to opposing portions of said first roller and said second roller; anda wire collector immediately following said first roller and said second roller,wherein said wire conveying means includes a guide member for guiding said wire electrode by allowing said wire electrode to be inserted in a hollow portion of a main body thereof, a nozzle member engaging on an outer peripheral surface of said guide member to be slidably movable thereon, and fluid driving means for moving a tip of said nozzle member to a vicinity of said opposing portions by the hydraulic pressure of the fluid, and for moving the tip of said nozzle member away from said opposing portions when the influx of the fluid substantially stops.