Automatic broken wire repairing method for wire electric dischar

Details Automatic broken wire repairing method for wire electric dischar Automatic broken wire repairing method for wire electric dischar

1991-09-27

1994-08-16

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 6914, B23H 710

Patent

active

053389123

ABSTRACT:
A broken wire electrode 3 of a wire electrode electric discharge machining device is automatically repaired at the wire breaking position. After the used portion is cut away, the wire electrode 3 is fed toward the work 1. Upon detection of contact of the wire electrode 3 with the work 1, the feeding of the wire electrode 3 is stopped. A predetermined amount of deflection is obtained when the feeding of the wire electrode 3 is stopped. The wire electrode 3 is then moved horizontally relative to the work 1 within a predetermined range, until the end of the wire electrode 3 eventually falls into the machined groove 14 and the wire electrode 3 comes out of contact with the work 1. Thereafter the feeding of the wire electrode 3 is resumed to span the wire electrode 3 across the feeding-side wire guide unit 4 and the receiving-side wire guide unit 5. The attitude of the wire electrode 3 within the machined groove 14 is constrained downward by the water jet 7 sucked into the machining liquid nozzle 27 via the suction pump 30.

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patent: 4465915 (1984-08-01), Corcelle
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patent: 5045662 (1991-09-01), Yamada
patent: 5055649 (1991-10-01), Iwasaki et al.
patent: 5077457 (1991-12-01), Onaka et al.
patent: 5138126 (1992-08-01), Naka et al.

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