Electric heating – Metal heating – Cutting or disintegrating
Patent
1980-02-05
1982-04-13
Shaw, C. C.
Electric heating
Metal heating
Cutting or disintegrating
219 69G, B23P 102
Patent
active
043249698
ABSTRACT:
An electrical discharge machining (EDM) system comprising: a mechanical unit constituting an EDM machine tool, a power-supply unit for providing a succession of machining pulses controlledly to an EDM gap formed between a tool electrode and a workpiece in the mechanical unit, a machining-fluid supply unit for delivering a machining fluid controlledly to the EDM gap, an electrical control unit disposed remote from the EDM gap for controlling at least one of the mechanical unit, the power-supply unit and the machining-fluid supply unit, and a gap monitoring electrical unit disposed in the vicinity of the EDM gap in the mechanical unit for providing an electrical signal representing a gap discharge condition, the gap monitoring unit having at its output an electro-optical transducer, the control circuit unit having at its input an opto-electrical transducer, the electro-optical transducer and the opto-electrical transducer being interconnected by an optical transmission line.
REFERENCES:
patent: 3843864 (1974-10-01), Wohlabaugh
patent: 3878397 (1975-04-01), Robb et al.
patent: 3987271 (1976-10-01), Bell, Jr. et al.
patent: 4161650 (1979-07-01), Caouette et al.
Inoue-Japax Research Incorporated
Ross Karl F.
Shaw C. C.
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