In this paper wire cut electro discharge process parameters are optimized by using Taguchi method. Process
parameters considered for the study are pulse on time, pulse off time and current. High Carbon high Chromium (HCHCr-D3)
steel is high tensile strength alloy which is mostly used in cold dies and tooling application that where high degree and
dimensional accuracy is required. HCHCr-D3 alloy steel plate of rectangular shape has been used for machining operation.
Performance of wire cut electro discharge machine (WEDM) with a molybdenum wire has been measured by material removal
rate (MMR) and surface roughness (SR). In Taguchi method L9 orthogonal array has been selected. The analysis of variance
(ANOVA) has been used to determine effect of each parameter on material removal rate (MRR) and surface roughness (SR).
