Abstract
Wire electrical discharge machining is a better choice for machining hard materials with very high accuracy which are difficult to machine. This work consists of optimizing the parameters of WEDM for better surface finish and diameter accuracy of tungsten carbide material. The grey relational analysis technique is used for the optimization of the process parameters. Three input variables of WEDM such as Current, Pulse off time, and Voltage were selected for finishing process. The parameters for the roughing process were current – 6 A, voltage – 8 V, Pulse off time – 3 µs and voltage gap – 55 V. Design of experiments has been developed using Taguchi method. The optimum machining parameters from the grey relational analysis was discharge current − 2 A, voltage − 5 V and pulse off time − 8 µs. The confirmation tests were carried out to validate the results.
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