Method and apparatus for wire feeding in a wire-cut electroerosi

Details Method and apparatus for wire feeding in a wire-cut electroerosi Method and apparatus for wire feeding in a wire-cut electroerosi

1993-07-29

1994-08-23

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

140112, 219 6917, B23H 710

Patent

active

053409582

ABSTRACT:
A wire feeding device for a wire-out electroerosion apparatus comprising a movable table (21) on which one of two clamps (35,45) for clamping a wire in use (2a) and a new wire (2b) from a spare bobbin, respectively, is provided. When the bobbin on which the wire in use is almost empty, one of the clamps (35) is moved into position opposite the other clamp (45) to thereby present a sheared end of the wire in use and a leading end of the new wire into abutting relationship. A welding circuit (80) joins the abutted wire ends whereby the joined wire may be smoothly fed past the various wire guides and into the machining slit formed in the workpiece, whereby continuous machining operations may be performed.

REFERENCES:
patent: 3891819 (1975-06-01), Ullmann et al.
patent: 3949790 (1976-04-01), Rass et al.
patent: 4379959 (1983-04-01), Inoue
patent: 4645894 (1987-02-01), Bonga
patent: 5237145 (1983-08-01), Magara et al.

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