Optimization of multi machining characteristics in WEDM of WC-5.3%Co composite using integrated approach of Taguchi, GRA and entropy method

doi:10.1007/s11465-012-0333-4

Front Mech Eng

2012, Vol. 7

Issue (3) : 288-299 https://doi.org/10.1007/s11465-012-0333-4

RESEARCH ARTICLE

Optimization of multi machining characteristics in WEDM of WC-5.3%Co composite using integrated approach of Taguchi, GRA and entropy method

Kamal JANGRA¹(

), Sandeep GROVER¹, Aman AGGARWAL²

1. YMCA University of Science and Technology, Haryana 121006, India; 2. Guru Premsukh Memorial College of Engineering, New Delhi 110036, India

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Abstract

Wire electrical discharge machining (WEDM) is a well known process for generating intricate and complex geometries in hard metal alloys and metal matrix composites with high precision. In present work, intricate machining of WC-5.3%Co composite on WEDM has been reported. Taguchi’s design of experiment has been utilised to investigate the process parameters for four machining characteristics namely material removal rate, surface roughness, angular error and radial overcut. In order to optimize the four machining characteristics simultaneously, grey relational analysis (GRA) coupled with entropy measurement method has been employed. Through GRA, grey relational grade has been computed as a performance index for predicting the optimal parameters setting for multi machining characteristics. Using Analysis of Variance (ANOVA) on grey relational grade, significant parameters affecting the multi-machining characteristics has been determined. Confirmatory results prove the potential of present approach.

Keywords tungsten carbide composite wire electrical discharge machining (WEDM) Taguchi method grey relational analysis (GRA) entropy measurement method

Corresponding Author(s): JANGRA Kamal,Email:kamaljangra84@gmail.com

Issue Date: 05 September 2012

Cite this article:

Sandeep GROVER,Aman AGGARWAL,Kamal JANGRA. Optimization of multi machining characteristics in WEDM of WC-5.3%Co composite using integrated approach of Taguchi, GRA and entropy method[J]. Front Mech Eng, 2012, 7(3): 288-299.

URL:

https://academic.hep.com.cn/fme/EN/10.1007/s11465-012-0333-4
https://academic.hep.com.cn/fme/EN/Y2012/V7/I3/288

Fig.1 EDX test for present work material

Fig.2 Experimental setup

Tab.1 Process variables and their levels

Fig.3 Representation of RoC in WEDM

Tab.2 Experimental layout and observed results

Tab.3 ANOVA table for MRR, SR, AE and RoC

Fig.4 Response graph for MRR

Fig.5 Response graph for SR

Fig.6 Response graph for AE

Fig.7 Response graph for RoC

Tab.4 Sequence of S/N ratio

Tab.5 The sequence after data pre-processing

Tab.6 Grey relational coefficients and Grade values

Tab.7 ANOVA for grey relational grade

Tab.8 Response Table for grey relational grade

Tab.9 Predicted and experimental values

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