Abstract

Electric discharge machining EDM is one of the maximum commonly used nontraditional processes for making accurate intricate shapes on hard materials like die steels and is most preferred process to be followed for die and mold making In this research work an attempt has been made to machining the En-19 tool steel by using copper electrode performer on electrical discharge machine Experiment plan has been designed using Taguchi technique to study the effect of different parameters and their levels by conducting least number of experiments Based on this L18 orthogonal array is been used Where Diameter of U-shaped electrode Current and Pulse on time are taken as process input parameters and material removal rate tool wear rate Overcut on surface of work piece are taken as output parameters Effort has been made to find out the optimum machining conditions by varying process parameters like current powder to be suspended in dielectric its concentration tool material and pulse-on duration at three levels with and without using external magnetic field