In the present manufacturing area, Electro discharge machining is one of the most emerging area for production of
various components. Electro-discharge machining (EDM) is a thermoelectric process which utilizes the heat energy generated by
spark to remove the material from the surface of work-piece. In the EDM process material removal takes place from both tool
material and work-piece. The material removal rate depends upon the work-piece material, tool material and machining
variables. Materials having low melting point having high material removal rate and hence lower surface finish. It is found that
with increase in pulse current and constant pulse-on-time material removal rates increases but it affects the surface finish of
material. EDM efficiency can be increased by supplying the oxygen gas between the spark gap and stack removal rate can be
increased by increasing the volume of discharge crater and regular occurrence of discharges.
