A STUDY ON SURFACE ROUGHNESS IN EDM MACHINING WITH COPPER ELECTRODE IN STAINLESS STEEL SKD11

Abstract

In EDM machining, surface roughness of workpiece greatly influenced the accuracy and product quality. Technological parameters of the process such as: Pulse on time, pulse off time and machining current were considered according to Taguchi’s orthogonal array then coupled with nine samples for experiment. On the basis of the experiment, when changing the input parameters, the results of the experiment will be analyzed for variance to evaluate the effect of parameters on the surface roughness. This is the basis for selecting the input parameters to achieve the optimum machining surface roughness in the EDM die sinking.