Electric heating – Metal heating – Cutting or disintegrating
Patent
1983-08-02
1986-04-15
Albritton, C. L.
Electric heating
Metal heating
Cutting or disintegrating
219 69G, 219 69P, 219 69S, B23H 102
Patent
active
045829748
ABSTRACT:
In an electric discharge machine including an electrode and a workpiece installed opposite each other with an insulating working liquid filling the gap therebetween and which is used to machine the workpiece by causing an electric discharge across the gap, two components of the frequency spectrum of the voltage waveform of the electric discharge across the electrode and the workpiece are analyzed to distinguish between normal and abnormal discharge conditions. The device includes elements for determining the conditions in the gap and which generate a signal according to the conditions of the interpole gap, based on the results of this analysis. When an abnormal condition exists, the size of the interpole gap may be changed, and the quiescent time between application of pulse voltages may be altered. Also, depending on the degree of abnormality, different quantities of dielectric fluid may be pumped through the interpole gap to remove accumulated impurities.
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Albritton C. L.
Evans Geoffrey S.
Mitsubishi Denki & Kabushiki Kaisha
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