Title: Experimental study and parameter optimisation of electro-discharge diamond face grinding

Authors: Gyanendra Kumar Singh, Vinod Yadava, Raghuvir Kumar

Addresses: Mechanical Engineering Department, Motilal Nehru National Institute of Technology, Allahabad, 211004, India. ' Mechanical Engineering Department, Motilal Nehru National Institute of Technology, Allahabad, 211004, India. ' Mechanical Engineering Department, Motilal Nehru National Institute of Technology, Allahabad, 211004, India

Abstract: Electro-discharge diamond face grinding (EDDFG), a hybrid machining process comprising diamond face grinding (DFG) and electro-discharge machining (EDM), has been developed for machining of electrically conductive difficult-to-machine very hard materials. The process employs simultaneous synergetic interactive effect of abrasion action and electro-discharge action. A face grinding setup for electro-discharge diamond grinding (EDDG) process is developed. The effect of wheel RPM, current, pulse on-time and duty factor on material removal rate (MRR), wheel wear rate (WWR) and average surface roughness (R_a), while machining high speed steel (HSS) workpiece, are investigated. It is observed that the MRR increase with increasing wheel RPM, current and pulse on-time, while it decreases with an increase in duty factor. The most significant factor affecting the EDDFG robustness has been identified as pulse on-time and duty factor.

Keywords: hybrid machining; diamond face grinding; electro-discharge machining; EDM; electrical discharge machining; optimisation; experimentation; grey relational analysis; GRA; EDDFG; material removal rate; MRR; wheel wear rate; surface roughness; high speed steel; HSS.

DOI: 10.1504/IJAT.2011.039001

International Journal of Abrasive Technology, 2011 Vol.4 No.1, pp.14 - 40

Published online: 27 Sep 2014 *

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