Title:
AUTOMATIC WIRE THREADER FOR WIRE ELECTRICAL DISCHARGE MACHINING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/174518
Kind Code:
A1
Abstract:
An automatic wire threader (1000) for a wire electrical discharge machining apparatus is provided with a wire recovery portion (500) that ejects a wire electrode (20) that has passed through a region where a workpiece (21) is subjected to electrical discharge machining such that the wire electrode is ejected between a pair of wire recovery rollers (501), a drive portion (400) for moving the pair of wire recovery rollers (501) so as to open and close, a wire feed motor (4) that drives a wire feed roller (3), a suction portion (100) that draws in the wire electrode by suction together with a fluid from the wire ejection side of the wire recovery portion (500), and a control unit (300) that performs control at the start of automatic wire threading such that feeding of the wire electrode (20) is started while the wire electrode (20) is drawn by the suction operation of the suction portion (100) after the opening movement for opening the pair of wire recovery rollers (501) is carried out and performs control when the leading edge of the wire electrode (20) arrives at the suction portion (100) such that the closing movement for closing the pair of wire recovery rollers (501) is carried out .
Inventors:
YAGI TSUBASA (JP)
NAKAJIMA YOJI (JP)
NAKAJIMA YOJI (JP)
Application Number:
PCT/JP2019/006988
Publication Date:
September 03, 2020
Filing Date:
February 25, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
B23H7/10
Foreign References:
| JP2006224215A | 2006-08-31 | |||
| JPH0259221A | 1990-02-28 | |||
| JPH052830U | 1993-01-19 |
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
Download PDF: