Title: An investigation into the effect of nickel micro powder suspended dielectric and varying triangular shape electrodes on EDM performance measures of EN-19 steel

Authors: Kuldeep Ojha; R.K. Garg; K.K. Singh

Addresses: Department of Industrial and Production Engineering, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar-144011, Punjab, India. ' Department of Industrial and Production Engineering, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar-144011, Punjab, India. ' Department of Mechanical Engineering and Mining Machinery Engineering, Indian School of Mines (ISM), Dhanbad-826004, Jharkhand, India

Abstract: In this article, a material removal rate (MRR) and tool wear rate (TWR) study on the powder mixed electrical discharge machining (PMEDM) of EN-19 (AISI-4140) steel has been carried out. Response surface methodology (RSM) has been used to plan and analyse the experiments. Average current, duty cycle, angle of triangular electrode and concentration of micro-nickel powder added into dielectric fluid of EDM were chosen as process parameters to study the PMEDM performance in terms of MRR and TWR. Experiments have been performed on newly designed experimental set-up developed in laboratory. Most important parameters affecting selected performance measures have been identified and effects of their variations have been observed. Also, recommended regression models have been verified by conducting confirmation experiments.

Keywords: powder mixed EDM; electrical discharge machining; PMEDM; material removal rate; MRR; tool wear rate; TWR; response surface methodology; RSM; electro-discharge machining; central composite design; CCD; nickel micropowder; triangular shape electrodes; performance measures; steel.

DOI: 10.1504/IJMMS.2012.046144

International Journal of Mechatronics and Manufacturing Systems, 2012 Vol.5 No.1, pp.66 - 92

Received: 19 Feb 2011
Accepted: 19 May 2011

Published online: 20 Aug 2014 *

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