Parametric Optimization Of Electro Discharge Machining Of SAE-8620 Alloy Steel Material Using Taguchi Technique

Abstract

EDM has become an significant and cost-effective method of machining really tough and brittle electrically conductive materials. It is widely used in the process of making molds and dies and sections of compound geometry and intricate shapes. The work piece material selected in this experiment is SAE-8620 alloy steel taking into account its wide usage in industrial applications. In today’s world SAE-8620 alloy steel contribute to almost half of the world’s production and consumption for industrial purposes. The input variable parameters are current, pulse on time and duty cycle. With the help of MINITAB software an orthogonal array of input variables was created using the design of experiments (DOE). The effect of the variable parameters mentioned above upon machining characteristics such as material removal rate (MRR), tool wear rate (TWR) is calculated and investigated. The tool material is copper, brass.The results reveal that the primary factor affecting the MRR is peak current subsequently followed by material, duty cycle and pulse on time, In case of TWR the primary factor affecting TWR is material then duty cycle and current at last spark on time.