Performance Evaluation of Rotary EDM by Experimental design Technique

Abstract

This paper presents an experimental design to study the performance of rotary electro-discharge machining (EDM). Scientific investigations have been carried out to find the effect of various EDM parameters. Titanimn alloy and die steel workpieces were machined with copper-tungsten tool electrode. The response surface technique has been adopted to compare the performance of rotary EDM, since such technological surfaces serve as an objective criteria to compare EDM systems. Moreover, such a surface and its response function serve as a mathematical model of the process. The analysis of the results was based on standard statistical techniques. The response surfaces and the corresponding response functions were determined for the machining indices for metal removal rate, surface finish, micro-hardness, etc. All the calculations were carried out through a computer programme specially developed for this purpose."