Journal of Research in Mechanical Engineering and Applied Mechanics ISSN: 3107-4510 (Online)

Authors: D Sridevi, B Nagaraju, Ch. Maheswara Rao

Abstract: The present work is to explore the influence of wire electro discharge machining (EDM) process parameters on the multiple performance characteristics of material removal rate (MRR) and surface roughness characteristics (Ra and Rz). A number of controlled experiments were done on a medium carbon steel EN8 using CNC wire EDM machine. Taguchi’s standard L18 orthogonal array (OA) has been followed for conducting the experiments. The optimal setting of process parameters was analysed by employing entropy method coupled with technique of order preference similarity to ideal solution (TOPSIS) and analysis of variance (ANOVA). From the analysis, the optimal combination of process parameters in order to achieve multi-responses is obtained at flushing pressure of 8Kg/cm2, pulse-on-time of 125µsec, pulse-off-time of 55 µsec, wire tension of 6 mm/min, wire feed of 2 Kg-f, servo voltage of 25 volts respectively.

 Keywords: Material removal rate, surface roughness characteristics (Ra and Rz), Taguchi method, technique of order preference similarity to ideal solution (TOPSIS)