Magnetic Field Assisted Electrical Discharge Machining of AISI 4140

Abstract:

Electric discharge machining (EDM) is a non-conventional machining process in which material removal take place by a series of electric spark generated between the small gap of both electrode and both immersed in dielectric medium. The gap conditions of EDM significntly affect the stability of machining process. Thus, the machining performance would be improved by removing the debris from the machining gap fastly. In view of this, the objective of present work was to investigate the effect of magnetic field on the material removal rate (MRR) and surface roughness (SR), in conjunction with the variation of electrical parameters like pulse on-off times and gap current, while keeping other electrical parameters and work piece/ tool material constant. Experimental results showed that the magnetic field assisted EDM improves the process stability. Moreover, the EDM process with high efficiency and quality of machined parts could fulfill the requirements of modern manufacturing industries.

• Periodical: Applied Mechanics and Materials (Volumes 592-594)
• Pages: 479-483
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.592-594.479
• Online since: July 2014
• Authors: Hemant Walkar*, Vijaykumar S. Jatti, T.P. Singh
• Keywords: Magnetic Field Assisted EDM, Material Removal Rate (MRR), Surface Roughness (SR), Taguchi Approach

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