Electric heating – Metal heating – Cutting or disintegrating
Patent
1982-08-10
1984-10-23
Paschall, M. H.
Electric heating
Metal heating
Cutting or disintegrating
219 69M, 219 69D, B23P 108
Patent
active
044790457
ABSTRACT:
A traveling-wire electroerosive machining method and apparatus in which a pressure created by and accompanying electrical machining discharges and tending to deflect the traveling electrode wire away from a straight line path defined between a pair of wire-guide members is compensated for by the machining fluid controlled both as to its direction and pressure. The apparatus shown includes a first sensor for sensing an angularity of the prescribed cutting path advanced by the traveling electrode wire to produce a first signal and a second sensor for sensing the electroerosive machining current passing between the electrode wire and the workpiece to produce a second signal. A control system is designed to maintain, in response to the first signal, the direction of supply of the machining fluid towards a region of the cutting gap immediately behind the advancing electrode wire, thereby laterally forcing the electrode wire against the said pressure tending to deflect while controlling the pressure of supply of the machining fluid in response to the second signal so as to counterbalance the pressure tending to deflect with the controlled fluid supply pressure, whereby to bring the electrode wire substantially into alignment with the aforesaid straight line path.
REFERENCES:
patent: 3699303 (1977-10-01), Kauffman et al.
patent: 4052584 (1977-10-01), Reznicek
patent: 4232208 (1980-11-01), Buhler
AGIE, "Force Effects in ED-Cutting", pp. 1-10, 6/7/1977.
Dubno Herbert
Inoue-Japax Research Incorporated
Paschall M. H.
Ross Karl F.
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