Title: A study of multiobjective parametric optimisation of electric discharge diamond cut-off grinding of Inconel 718

Authors: Deepak Rajendra Unune; Harlal Singh Mali

Addresses: Department of Mechanical Engineering, Malaviya National Institute of Technology, Jaipur Jaipur-302017, Rajshtan, India ' Department of Mechanical Engineering, Malaviya National Institute of Technology, Jaipur Jaipur-302017, Rajshtan, India

Abstract: Hybrid machining techniques are becoming more and more popular for machining of difficult-to-cut materials. This paper presents an approach for the optimisation of electric discharge diamond cut-off grinding of Inconel 718 with multiple performance characteristics based on the Taguchi orthogonal array with grey relational analysis. In this study, the machining parameters namely, wheel speed, current, pulse-on-time, and duty factor are optimised for performance characteristics, i.e., material removal rate and surface roughness. The optimal machining parameters are determined by the Grey relational grade as the performance index. The research result identifies significant machining parameters and their effects on process performance. The confirmation experiments have been conducted to verify the optimal process conditions. Experimental results show that the performance of process improved effectively through this approach.

Keywords: electrical discharge diamond grinding; electro-discharge diamond grinding; EDDG; diamond cut-off grinding; Inconel 718; optimisation; Taguchi methods; grey relational analysis; GRA; multiobjective optimisation; parametric optimisation; orthogonal arrays; wheel speed; current; pulse-on-time; duty factor; material removal rate; MRR; surface roughness; surface quality; electrical discharge machining; electro-discharge machining; EDM.

DOI: 10.1504/IJAT.2016.078281

International Journal of Abrasive Technology, 2016 Vol.7 No.3, pp.187 - 199

Available online: 29 Jul 2016 *

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