Experimental Investigation and Modelling of EWR, Ra and MRR in Electric Discharge Machining of AISI 316 Steel

Abstract

The triangular shape graphite electrode materials have been utilized in the electric discharge machining by considering this objective, the parameters discharge current, pulse time, and voltage considered as input parameters and EWR, MRR, and Ra value as output parameters to perform machining on AISI 316 steel in EDM. The experimentation performed on the commercial EDM machine by considering the number of runs which was defined by the DOE Taguchi method. By using regression analysis, the different correlations were formed in between discharge current, pulse time, and voltage i.e. input parameters and EWR, MRR, and Ra value i.e. output parameters. The individual as well as combined correlations are formed in between input and output parameters. The result analysis shows the co-relation between runs and the estimated and experimental values for the different output parameters. The conclusion shows that the final equation for different output parameters would be able to predict EWR with accuracy of 97.09%, MRR with accuracy 99.39%, and Ra with accuracy of 99.51%.