Experimental Study of WEDM Process Parameters during the Machining of Aluminum Metal Matrix Composite (AMMC)

Abstract

In the present work an attempt has been made to investigate the effect of wire electric
discharge machining (WEDM) process parameters on the multiple performance
characteristics while machining of Aluminium metal matrix composite (AMMC). A series of
experiments were done as per the standard Taguchi’s L27 orthogonal array by considering
pulse-on-time (Pon), pulse-off-time (Poff) and peak current (Ip) as the controlled process
parameters at three levels. The multiple responses of material removal rate (MRR) and
surface roughness (Ra) are optimized concurrently using a multi-criteria decision making
process called preference selection index (PSI) method. ANOVA is employed to study the
contribution of process parameters on the multiple responses.