Abstract

This paper deals with the use of the Taguchi method in the realization of experiments to solve the multiple answers in the process of EDM machining using copper and graphite electrodes. This manufacturing process was carried out on the aluminum microfusion material widely used in the footwear manufacturing industry. The experimentation was carried out according to an orthogonal arrangement L8. Analysis of variance (ANOVA) was used to determine the effects of the input variables (tooling material, pulse time, tool shape and cutting depth) on the output variables (material removal rate and surface roughness); as well as a regression analysis to predict the results of the experimental analysis. The results have shown that machining parameters can be optimized with considerations of multiple responses effectively. It is evident that the pulse time is the main influencer in the material removal rate (MRR) and the machining time has a greater influence on the surface roughness (Ra). Finally, it was demonstrated that the copper electrode has better working efficiency and the graphite gives better surface roughness.