Title: Some anomalies in the experimental results of EDM

Authors: K. Buschaiah; P. Laxminarayana; V.S.R. Murti

Addresses: Department of Mechanical Engineering, University College of Engineering, Osmania University, Hyderabad – 500 007, India. ' University College of Technology, Osmania University, Hyderabad – 500 007, India. ' Sree Visvesvaraya Institute of Technology and Science, Mahabubnagar – 509 204, India

Abstract: In electro discharge machining (EDM) the metal removal occurs from the erosive effects of high frequency sparks. Consequently the erosion rate depends on spark energy, sparking frequency and the factors affecting them. However, the experimental results are highly random and sometimes unexpected. Material erosion rate and surface roughness were analysed for the effect of important factors like pulse parameters (voltage, current, on time and off time), polarity and work material. Taguchi method of experiment planning with orthogonal arrays was adopted to analyse the anomalies observed in the experimental results.

Keywords: metal removal rate; MRR; surface roughness; orthogonal arrays; electro-discharge machining; EDM; electrical discharge machining; pulse parameters; polarity; work material; Taguchi methods.

DOI: 10.1504/IJMTM.2011.046760

International Journal of Manufacturing Technology and Management, 2011 Vol.24 No.1/2/3/4, pp.57 - 70

Available online: 04 May 2012 *

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