Wire electrical discharge machining apparatus

Details Wire electrical discharge machining apparatus Wire electrical discharge machining apparatus

1989-10-06

1990-10-23

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

B23H 710

Patent

active

049654284

ABSTRACT:
A mechanism for preventing the loosening of a wire electrode of an EDM apparatus which is wound around a bobbin. The mechanism is provided with a loosening preventive device 5 including a presser plate 8 for pressing the outer periphery of the wire electrode against the bobbin by a spring pressure. The loosening preventive device presses the wire before electrical discharge and is separated from the bobbin when the electrical discharge is started. When the wire is broken or the wire feeding is stopped, the wire breaking or the feeding stop is detected and the presser plate is immediately pressed against the outer periphery of the wire so as to prevent the returning wire from bulging or backlashing out of the bobbin.

REFERENCES:
patent: 4689462 (1987-08-01), Goto

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