Volume 2 Issue 3 pp. 479-490 Summer, 2011


Simultaneous optimization of material removal rate and surface roughness for WEDM of WC-Co composite using grey relational analysis along with Taguchi method


Kamal Jangra, Sandeep Grover and Aman Aggarwal


In this paper, wire electrical discharge machining of WC-Co composite has been reported. Influence of taper angle, peak current, pulse-on time, pulse-off time, wire tension and dielectric flow rate were investigated for material removal rate (MRR) and surface roughness (SR) during intricate machining of a carbide block. In order to optimize MRR and SR simultaneously, grey relational analysis (GRA) has been employed along with Taguchi method. Through GRA, grey relational grade is used as a performance index to determine the optimal setting of process parameters for multiple machining characteristics. Analysis of variance (ANOVA) shows that the taper angle and pulse-on time are the most significant parameters affecting the multiple machining characteristics. Confirmatory results, proves the potential of GRA to optimize process parameters successfully for multi-machining characteristics.


DOI: 10.5267/j.ijiec.2011.04.005

Keywords: Tungsten carbide composite, wire electrical discharge machining, Taguchi method, grey relational analysis, multi-characteristics optimization
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