AN EXPERIMENTAL INVESTIGATION AND COMPARISON OF PMEDM WITH CONVENTIONAL EDM PROCESS

Abstract

This present experimental work is to find out the optimize input process parameters of powder mixed electrical
discharge machining (PMEDM)on OHNS-O2 with graphite powder. Taguchi design is used to found out the
optimized value and to analyze the experiments. Analysis were done to investigate the effects of the process
parameters viz. pulse on time (Ton) , pulse off-time (Toff)& current and concentration of the Sic powder in IPOL
dielectric (C) and its effects on material removal rate (MRR), surface roughness (Ra),and process parameters were
optimized for high MRR, low Ra and machining timing using Taguchi function approach of MINITAB
software.optimal factor for Surface Roughness was obtained, and conventional EDM process is undergone for the
obtained surface roughness factor.Both process Roughness value are compared and found that the PMEDM process
is better than conventional EDM process.