Investigations on Material Removal Rate of AISI D2 Die Steel in EDM using Taguchi Methods

Abstract

Electrical discharge machining (EDM) process is one of the most commonly used non conventional precise material removal & world class standard non contacting machining processes. The work piece must be a conductive electricity material which is submerged into the dielectric fluid for better erosion. This process widely used for machining of hard, brittle, component   material,  complex geometry, intricate shapes, making moulds & deep holes by arc erosion in all kinds of electro conductive materials. The workpiece material selected in this study is AISI D2 Die Steel. The input parameters are voltage, current, pulse on time and pulse off time. L₉ orthogonal array was selected as per the Taguchi method. The data have been analyzed using Minitab15 Software. The effect of above mentioned parameters upon machining performance characteristics such as Material Removal Rate (MRR) is studied and investigated on the machine model C-3822 with PSR-20 Electric Discharge Machine.  The copper alloy was used as tool material.

Keywords: EDM, MRR, ANOVA, Taguchi method, AISI D2 Die steel, copper electrode