Experimental stury of Material Removal Rate for Electrical Discharge Machining

Abstract

Electrical discharge machining (EDM) process is one of the most commonly used nonconventional precise material
removal processes, based on thermo electric energy between the work piece and an electrode. It is the thermal erosion
process in which metal is removed by a series of recurring electrical discharges between a cutting tool acting as an electrod e
and a conductive work piece, in the presence of a dielectric fluid. In this process, the material removal is done electro
thermally by a series of successive discrete discharges between electrode and the work piece[1].
Material removal rate (MRR) is an important performance measure in EDM process. Since long, EDM researchers have
explored a number of ways to improve and optimize the MRR. The research work in this area shares the same objectives of
achieving more efficient material removal coupled with a reduction in tool wear and improved surface quality[2].
This paper deals with the experimental investigation on High steed steel by EDM process using a special copper electrode
as the tool. The influence of discharge current, pulse-on time, duty factor on material removal rate (MRR) has been studied.