Method and apparatus for machining a workpiece in a travelling w

Details Method and apparatus for machining a workpiece in a travelling w Method and apparatus for machining a workpiece in a travelling w

1983-04-19

1986-07-01

Albritton, Clarence L.

Electric heating

Metal heating

Cutting or disintegrating

2041297, 219 69V, 219 69M, 219 69C, B23H 102, B23H 704

Patent

active

045981906

ABSTRACT:
A travelling wire EDM apparatus wherein a workpiece is cut by electrical discharges by a travelling wire electrode, relative motion of the workpiece and the wire electrode being controlled by a numerical control unit which, in addition, controls transverse oscillations of the electrode wire relative to the workpiece along the cutting path. The energy of the electrical discharges is varied as a function of the amplitude of the transverse oscillations of the electrode wire relative to the workpiece such as to obtain maximum electrical discharge energy when the amplitude of vibration of the electrode wire is at a minimum and minimum energy when the amplitude of vibration of the electrode wire is at a maximum. The invention permits to achieve a good surface finish on the machined surface of the workpiece corresponding to the peak of the transverse electrode wire oscillation displacement being reached simultaneously with minimum electrical discharge energy, and thus achieves rough cutting and finish cutting of the workpiece in a single pass.

REFERENCES:
patent: 3832510 (1974-08-01), Pfau et al.
patent: 3832511 (1974-08-01), Bell, Jr. et al.
patent: 3849624 (1974-11-01), Dulebohn et al.
patent: 4081652 (1978-03-01), Janicke et al.
patent: 4292491 (1981-09-01), Tanaka et al.
patent: 4320280 (1982-03-01), Inoue
patent: 4324970 (1982-04-01), Nanasawa et al.
patent: 4358655 (1982-11-01), Inoue

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