Effect of Electrical Process Parameters of Electric Discharge Machine (EDM) on Surface Roughness and Material Removal Rate for EN 8 alloy steel

Vivek Yadav , Mr. Surender Singh , Dr. Bhupender Singh


In today’s time, Non Traditional Machining is best suited for machining exotic engineering metallic materials, composite materials and high tech ceramics having good mechanical properties and thermal characteristics as well as sufficient electrical conductivity.EDM has become one of the most important and cost-effective method of machining extremely tough and brittle electrically conductive materials. It is widely used in the process of making moulds and dies and sections of complex geometry and intricate shapes. The work piece material selected in this experiment is EN 8 after reviewing all other materials. The input variable parameters are current, voltage, pulse on time and duty factor. Taguchi Method is applied to create an Orthogonal Array of input variables using the Design Of Experiment (DOE). The effect of variable parameters mentioned above upon Material Removal Rate (MRR) and Surface Roughness (SR) is analyzed and investigated. Each set of reading of Orthogonal Array is used by making two cuts of 1 mm depth and weight after first and second cut is checked to calculate average MRR and average surface roughness. Then analysis of the experiment is done in Taguchi to get the trend of MRR and SR with four variable input parameters.


EDM, MRR (Material Removal Rate), SR (Surface Roughness), Taguchi Method, OA, S/N Ratio, DOE.

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Anil Kumar, Khempal, (2015), "Key Engineering of Electrical Discharge Machining: A Review", International Journal for Research in Applied Science & Engineering Technology (1JRASET), Volume 3 Issue VII, July 2015, PP-384-395.

Pravin R. Kubade, V. S. Jadhav, “An Experimental Investigation of Electrode Wear Rate (EWR), Material Removal Rate (MRR) and Radial Overcut (ROC) in EDM of High Carbon High Chromium Steel (AISI D3)”, International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 — 8958, Volume-1, Issue-5, June 2012, PP-135-140.

Farman Khan, Beant Singh, “Experimental Investigation of Machining of Al/SiC MMC On EDM by using Rotating and Non-Rotating Electrode”, International Journal of IT, Engineering and Applied Sciences Research (IJIEASR) ISSN: 2319-4413,Volume 1, No. 1, October 2012,PP-50-53.

Vikas, Apurba Kumar Roy, “Effect and Optimization of various Machine Process Parameters on the surface roughness in EDM for an EN41 Material using Grey-Taguchi”, Procedia Materials Science 6 ( 2014 ) 383 — 390.

Raghuraman S, Thiruppathi K, “optimization of EDM parameters using Taguchi method and grey relational analysis for mild steel is 2026”, international journal of innovative research in science, engineering and technology vol. 2, issue 7, July 2013, issn: 2319-8753,PP-3095- 3104.

A dissertation by Nischint Sahai, “mathematical modelling of material removal rate And hardness in electric discharge machine” by DOE Approach.

B. Singarvel, T. Selvaraj, “Multi Objective Optimization in Turning of EN25 Steel Using Taguchi Based Utility Concept Coupled With Principal Component Analysis”, Procedia Engineering 97 (2014) 158 — 165.


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