Effect of electrode geometrical parameters in die sink EDM: A Review

Mechanical Engineering

Electrical discharge machining (EDM) is one of the non-traditional machining processes, based on thermo electric energy between the work piece and an electrode. In this process, the material removal is occurred electro thermally by a series of successive discrete discharges between electrode and the work piece. The parametric analysis of the EDM process by using different electrode shapes has been carried out. This Research discusses the performance of die sinking EDM due to the shape configuration of the electrode. The effect of electrode shapes configuration on the performance of die sinking electric discharge machine has been carried out. The basis of controlling sink Electrical Discharge machining depends on electrical & non electrical parameters. Performance of Electrical discharge machining is measured in terms of Material Removal Rate MRR ,Tool Wear Rate TWR. The objective of this paper is to study the effect of process parameters and electrode shape configuration on the machining characteristics such as surface quality, material removal rate and electrode wear. In this study we found better machining performance is obtained generally with the electrode as the cathode and the work-piece as an anode. In this review we observe that for high MRR main process parameters are peak current, pulse on time ,pulse off time, whereas for electrode wear are mainly influenced by peak current and pulse on time. Surface quality is mainly influenced by peak current. As far as tool shape configuration concerned best tool shape for higher MRR and lower TWR is circular, followed by square, triangular, rectangular, and diamond cross sections.

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