Electric heating – Metal heating – Cutting or disintegrating
Patent
1988-06-30
1990-01-16
Jennings, Derek S.
Electric heating
Metal heating
Cutting or disintegrating
219 6913, B23H 704
Patent
active
048945048
ABSTRACT:
An electrical discharge wire cutting machine (EDWC) includes an apparatus for controlling the flow of electrical energy between an electrically conductive piece part and a wire electrode of the EDWC machine. A pulse type power supply has first and second leads of opposite polarity with the first lead being electrically connected to the piece part and the second lead having first and second portions connected to the wire electrode at two separate, spaced-apart locations. Diodes electrically isolate the first and second portions of the second lead line whereby the first and second portions of the second lead line are electrically independent from one another. Further, first and second independently controllable arrays of capacitors are connected between the first lead line and the first and second portions of the second lead line respectively. The capacitance of these arrays is controllably adjustable to a range of values suitable for the instantaneous cutting conditions.
REFERENCES:
patent: 4104502 (1978-08-01), Ullmann et al.
patent: 4243864 (1981-01-01), Vieau et al.
patent: 4347424 (1982-08-01), Obara
patent: 4559434 (1985-12-01), Kinoshita
patent: 4598190 (1986-07-01), Balleys
Evans Geoffrey S.
Jennings Derek S.
Pappas George
T-Star Industrial Electronics Corporation
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