Optimization of Process Parameters Wire Cut Electro Discharge Machining (WEDM) on HCHCr-D2 Steel Material

With the increasing demands of high surface finish and machining of complex shape geometries, conventional machining process are now being replaced by non-traditional machining processes. Wire EDM is one of the non-traditional machining processes which is basedon Electrical Discharge Machining Process, which is also called electro-erosion machining process In the present research parametric analysis of wire EDM parameter is performed by Taguchi method on surface roughness (SR) and material removal rate (MRR). The Design of experiments is carried out considering Taguchi technique with four input parameters, namely, pulse-on, pulse off, and voltage. L9 orthogonal array is used to conduct experiments. ANOVA is used to find out the most significant parameter that affects the surface roughness. Optimizations of parameters are done by finding out the S/N ratios of each experiment runs. Regression Analysis is carried out togenerate a mathematical model of surface roughness, material removal rate and to predict the value obtained from the optimal parameter settings. Keywords: WEDM, Taguchi method, Annova, SR, MRR