seen that hey a workpiece of metal

摘要

A method for treating the surface of a workpiece involves vibrating a consumable electrode such as tungsten carbide toward and away from the surface while maintaining the electrode and workpiece connected across a capacative discharge circuit which is continuously supplied by a d.c. potential source. The d.c. open circuit voltage of the supply, the charging current for the capacative discharge circuit and the capacitance of the discharge circuit are controlled to prevent electrode consumption.