Electric heating – Metal heating – Cutting or disintegrating
Patent
1990-06-14
1992-01-21
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
B23H 102
Patent
active
050830015
ABSTRACT:
A waveform control device for an electrical discharge machine apparatus which supplies current pulses to the gap between an electrode and a workpiece for machining of the workpiece. A first D.C. source, which supplies at least a part of a voltage that is applied across the gap, is connected in parallel with first and second circuits comprising a series connection of a switch and a diode. Connected between a first and second series circuit is a switched conductive circuit which, together with an auxiliary D.C. source, maintains the current flow at a base current level. Control of operation of the switches in the first and second circuits permit a controlled discharge of current across the gap while permitting the output voltage to be clamped at a safe level. A plurality of inductive circuits may be used to provide selectivity, where the inductances are different and to provide further control of the discharge current shape. A variable inductance, whose value is proportional to the output peak current, may be used to control current ripple.
REFERENCES:
patent: 3832510 (1974-08-01), Pfau et al.
patent: 4163887 (1979-08-01), Buhler et al.
patent: 4678885 (1987-07-01), Dresti et al.
patent: 4713516 (1987-12-01), Buhler et al.
patent: 4945199 (1990-07-01), Tanaka et al.
patent: 5019770 (1991-05-01), Harada et al.
Kinbara Yoshihide
Nishikawa Morihisa
Ozaki Yoshio
Evans Geoffrey S.
Mitsubishi Denki K.K.
LandOfFree
Waveform control device for electrical discharge machining appar does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Waveform control device for electrical discharge machining appar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Waveform control device for electrical discharge machining appar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-116968