ELECTRICAL DISCHARGE MACHINING PROCESS EMPLOYING BRASS ELECTRODE, SILICONE OIL DIELECTRIC, AND CONTROLLED VOLTAGE PULSES

摘要

Electrical discharge machining process in which the parameters are controlled to provide higher metal removal rates than heretofore considered possible, together with maintenance of good surface integrity. Specifically, the new process makes use of a brass electrode, a silicone oil dielectric, and a pulsating voltage between the electrode and the workpiece, the pulses of the voltage having a pulse duration ranging from 4 to 200 microseconds and an on time of from 20 to 80 percent of the period of such pulses.