Title: An investigation into surface roughness of work piece produced by chromium powder suspended dielectric in PMEDM process

Authors: Kuldeep Ojha; Rajiv Kumar Garg; Boppana V. Chowdary

Addresses: Department of Mechanical and Manufacturing Engineering, The University of The West Indies, St. Augustine, Trinidad and Tobago ' Department of Industrial and Production Engineering, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar-144011, Punjab, India ' Department of Mechanical and Manufacturing Engineering, The University of The West Indies, St. Augustine, Trinidad and Tobago

Abstract: In this research article, an investigation of surface roughness (SR) of work surfaces produced by the powder mixed electrical discharge machining of EN-8 steel has been carried out. Response surface methodology has been used to plan and analyse the experiments. Average current, duty cycle, electrode angle and concentration of chromium powder added into the dielectric fluid were selected as process parameters. Experiments have been performed on a newly designed experimental set-up developed in the laboratory. An empirical model has been developed for surface roughness. In addition, the recommended model has been verified by conducting confirmation experiments. [Received 14 May 2015; Revised 14 April 2016; Accepted 8 June 2016]

Keywords: electrical discharge machining; RSM; response surface methodology; powder mixed EDM; PMEDM; surface roughness; surface quality; chromium powder; dielectric fluids; electro-discharge machining; EN-8 steel; average current; duty cycle; electrode angle; powder concentration.

DOI: 10.1504/IJMR.2016.078253

International Journal of Manufacturing Research, 2016 Vol.11 No.2, pp.189 - 208

Received: 01 Jul 2015
Accepted: 08 Jun 2016
Published online: 09 Aug 2016 *

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