Comparative Study the Effect of Wire Material on MRR in WEDM Process

This study discusses the influence of wire material on material removal rate. Further, the process parameters like pulse on time, voltage and pulse off time are also investigated on the performance parameters such as material removal rate by in WEDM process. The experiment has been conducted on SS 304 work piece because SS 304 steel has various industrial applications in manufacturing of reinforcement of bars, drainage water goods, street furniture, roofing, mining, electrical industries and petrochemical industries etc. the machining is done by using brass wire and diffused wire of 0.25 mm diameter as tool material The experimental layout is based on Taguchi L9 orthogonal array. Further, the analysis of variance (ANOVA) is used to investigate the results obtained from Taguchi method. The analysis of results obtained for material removal rate indicates that voltage and pulse on time has the highest impact on material removal rate. As the pulse on time increases, the material removal rate also increases, whereas the material removal rate varies indirectly with the voltage and pulse off time i.e. with the increase in voltage and pulse off time the material removal rate decreases. The optimum values of pulse on time, voltage and pulse off time for material removal rate are 120 µs, 15 V and 40 µs respectively.