Comparative Study of Aluminum Alloy 6061 Tool with Graphite, Copper and Brass Tools in EDM

The machining behavior of Aluminum Alloy 6061 using Electro Discharge Machining (EDM) is the aim to investigate with three different tool materials are Copper, Graphite and Brass. The machinability of Aluminum Alloy 6061 in EDM is to beanalyzed in terms of Material Removal Rate (MRR), Tool Wear Rate ( TWR ) and Surface roughness (Ra) by considering the following EDM process parameters viz. Pulse On Time (Ton), Current (I), Voltage (V), Pulse Off Time (Toff). Dielectric flashing circulation pressure is kept constant through out the process. Taguchi method of L9 orthogonal arrayisused to determine the optimal factors of electro discharge machining process is used to investigate feasibility of design of experiment techniques.