Patent Number: 6,294,748

Title: Wire electrical discharge machine

Abstract: A wire electrical discharge machine having an upper wire guide and a lower wire guide through which a wire electrode is passed and which have therein channels for the working fluid to flow therethrough, including: ajet nozzle which is engaged with and fixed to an outer peripheral surface of a distal end portion of the upper wire guide, and is adapted to guide the wire electrode to a hole in the lower wire guide through use of the fluid; a working fluid nozzle for covering the jet nozzle and having a through hole in a central portion thereof and a collar portion in a periphery thereof; a retaining plate for fixing an outer peripheral portion of the working fluid nozzle including the collar portion, and the retaining plate having a channel for supplying and discharging the fluid; and a sealed space portion which is disposed between the collar portion of the working fluid nozzle and the retaining plate and expands and contracts due to the fluid which flows in or out through the channel.

Inventors: Moro; Toshio (Tokyo, JP), Satou; Seiji (Tokyo, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha

International Classification: B23H 7/10 (20060101); B23H 7/08 (20060101); B23H 001/00 (); B23H 007/10 ()

Expiration Date: 09/25/2018