Mathematical Modelling of Material Removal Rate and Hardness in Electric Discharge Machine by Doe Approach

Abstract

In last forty years there is tremendous research in machining and development in technology. With increase in comptetion in market and to attain high accuracy now a days the non-conventional machining are become lifeline of any industry. One of the most important non conventional machining methods is Electric discharge machining. Although productivity by EDM is low but its high accuracy, finishing, ability of machining any hard materials and to produce intricate shape increases its demand in market. In thesis work literature has been studied in context to modeling of EDM. The equation of MRR and hardness has develop. In order to attain target and optimum results, taguchi method employed. The appropriate orthogonal array has been selected as per number and there levels to performs minimum experimentation The approach of optimum and modeling of MRR and hardness for batch production has been applied because now days, many industry are following batch production. The three materials which are easily available in the market as one of the parameter En24, EN19, EN353 has been taken for experimentation work. The optimum value has been determined with the help of main effect plot and anova table to find out optimum value. But our anova table is not supporting any parameter but it is proved that how machining of batch production can be improve. Kerosene has been taken as dielectric fluid .With help of MINITAB software mathematical modeling has been foun out that is acceptable to experimental data also with help of fuzzy logic. The optimum value has been determined which is suitable for both MRR and hardness