Power source arrangement for electric discharge machining

Details Power source arrangement for electric discharge machining Power source arrangement for electric discharge machining

1981-04-08

1984-02-14

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69G, 219 69S, B23P 108

Patent

active

044318952

ABSTRACT:
A power source arrangement for electric discharge machining in which a power source and a switching element are connected in parallel to an electrode and a workpiece and the switching element is driven by a pulse signal of a predetermined period to perform electric discharge machining of the workpiece, there being also provided a pulse signal generator for generating a pulse signal in which the ratio of the OFF interval to the ON interval gradually increases with the lapse of time and a detector for detecting the occurrence of an arc or short in the spark gap. Upon detection of arcing or shorting in the spark gap by the detector, the pulse signal generator is activated so that the pulse signal of the predetermined period to be applied to the switching element is gated by the output pulse signal from the pulse signal generator until the arc or short is removed.

REFERENCES:
patent: 3614368 (1971-10-01), Lobur
patent: 3697719 (1972-10-01), Verner et al.
patent: 4071729 (1978-01-01), Bell, Jr.
patent: 4292490 (1981-09-01), Bell, Jr. et al.

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