Abstract— Due to the presence of large number of process variables and complex stochastic process mechanisms in WEDM, selection of optimum machining parameters combinations for obtaining better Surface Roughness (Ra) is a challenging task. In this paper, the effects of various process parameters of WEDM like peak current (IP), pulse on time (TON), wire feed (WF), pulse off time (TOFF) and wire tension (WT) have been investigated to reveal their impact on Ra of EN-8 steelworkpiece and copper wire as tool using Taguchi's L-27(3*5) Orthogonal Array (OA) designs. The optimal set of process parameters has also been predicted to minimizethe Ra.It is found that the decrease the Pulse on Time and Peak current will decrease the Ra significantly.Pulse on Time, Peak current, Wire Feed are the significant factors, whereas the other factors are not significant.

Index Terms— WEDM, Ra, TON, TOFF, Peak Current, WT, WF

Cite: Nimo Singh Khundrakpam, Jasvir Singh, Kulwinder Kumar, and Som Kumar, " Effect of Wire EDM Process Parameters on Surface Roughness," International Journal of Mechanical Engineering and Robotics Research, Vol. 3, No. 2, pp. 435-441, April 2014.