Electric discharge machining apparatus with pairs of low inducta

Details Electric discharge machining apparatus with pairs of low inducta Electric discharge machining apparatus with pairs of low inducta

1994-12-23

1996-11-05

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 6918, B23H 102

Patent

active

055720030

ABSTRACT:
An electric discharge machining apparatus for machining a workpiece by means of electric discharges using a tool electrode spaced from the workpiece and defining therewith a machining gap, comprising a pair of individual cables with a low capacitance and a coaxial cable with a low inductance to carry a train of successive current pulses from a power supply to the machining gap. The pair of cables are larger in current-carrying capacity than the coaxial cable. A current pulse flowing through the pair of cables is combined with that flowing through the coaxial cable to thereby obtain a total current pulse of a steep slope leading edge while preventing undesirable stray capacitance.

REFERENCES:
patent: 3348015 (1967-10-01), Rhyner et al.
patent: 4447713 (1984-05-01), Tsurumoto et al.
patent: 4491713 (1985-01-01), Patton et al.
patent: 4661674 (1987-04-01), Inoue
patent: 4800248 (1989-01-01), Futamura et al.
patent: 5019685 (1991-05-01), Nishimura

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