TW-EDM Method and apparatus with excess fluid stripping gas jet

Details TW-EDM Method and apparatus with excess fluid stripping gas jet TW-EDM Method and apparatus with excess fluid stripping gas jet

1983-06-13

1985-04-23

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69D, 219 69M, B23P 108

Patent

active

045131929

ABSTRACT:
A TW-EDM method and apparatus wherein a continuous electrode wire is axially transported from a supply side to a takeup side to travel through an electrically conductive workpiece while a relative displacement is effected between the traveling wire and the workpiece such that the wire is advanced in the workpiece along a prescribed cutting path transverse to the traveling axis of the wire as electroerosive material removal proceeds by the action of electrical discharges across a machining gap flooded with a weakly conductive aqueous machining fluid and maintained between the advancing wire and the workpiece, thereby progressively cutting the workpiece along the cutting path and developing a groove of cutting behind the advancing electrode wire. The rate of advance of the electrode wire for a given machining current is increased by stripping a portion of the flooding fluid which is present in the cutting groove in a region immediately behind the advancing electrode wire. The position of the gas nozzle is angularly controlled so as to maintain the gas jet directed at the said region despite changes in the course of the cutting path.

REFERENCES:
patent: 2526423 (1950-10-01), Rudorff
patent: 3936653 (1976-02-01), Bals
patent: 4317019 (1982-02-01), Itoh

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