Dependence of Rate of Dielectric Removal on Cathode Shape

The optimal shape of the ending part of a cathode for electrical-discharge machining of dielectrics, which provides an increased rate of removal of dielectrics without changing any physical and technical parameters of the discharge, is proposed in this study. It is established that the rate of removal of the material when using a cathode with a conical end is five times higher than in the case of using a cylindrical end, which is a consequence of the natural superposition of the ultrasound cavitation on pulsed discharges.

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