Optimisation of EDM process parameters using grey-Taguchi technique
by Milan Kumar Das; Kaushik Kumar; Tapan Kr. Barman; Prasanta Sahoo
International Journal of Machining and Machinability of Materials (IJMMM), Vol. 15, No. 3/4, 2014

Abstract: This paper presents an experimental study of material removal rate (MRR) and roughness characteristics in electrical discharge machining (EDM) of EN 31 tool steel. Experiments are carried out by utilising the combination of four process parameters viz. pulse on time, pulse off time, discharge current and voltage based on L27 Taguchi orthogonal array. Multi-response optimisation of EDM process parameters is done with respect to MRR and five different surface roughness characteristics based on Taguchi method coupled with grey relational analysis. Analysis of variance (ANOVA) is performed and it is observed that current is the significant process parameter that affects the responses. Optimal setting has been verified through confirmation test and the result shows a good agreement with the predicted value. This indicates utility of the grey-Taguchi technique as a multi-objective optimiser in the field of EDM. Also, the surface morphology is studied with the help of scanning electron microscopy.

Online publication date: Sat, 19-Apr-2014

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