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Influence of machining parameters on surface roughness during EDM of mild steel

Khan, Ahsan Ali and Adesta, Erry Yulian Triblas and Mohammad , Yeakub Ali (2011) Influence of machining parameters on surface roughness during EDM of mild steel. In: Advanced Machining Process. International Islamic University Malaysia, Kuala Lumpur, Malaysia, pp. 33-37. ISBN 9789674181628

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Abstract. The present paper reports on the influence of process parameters on surface roughness of mild steel during EDM using a copper electrode. Surface quality was evaluated on the basis of work surface roughness, micro cracks and thickness of the recast layer. Current, pulse-on time, pulse-off time and voltage were the variable parameters for the present investigation. It was found that pulse-on time is the most significant factor for work surface roughness. With increase in pulse-on time the work material gets more time to absorb heat and more melting and vaporization of material takes place producing a rough surface. Work surface roughness was also found to increase with increase in current. A higher current produces a spark of higher energy removing more material and leaving a larger crater that results a rough surface. An increase in voltage also results a poorer surface, but voltage demonstrated to have a very small effect on job surface roughness.

Item Type: Book Chapter
Additional Information: 3129/25550
Uncontrolled Keywords: EDM, surface roughness, current; voltage; on-time; off-time
Subjects: T Technology > TS Manufactures > TS200 Metal manufactures. Metalworking
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Prof. Dr. Ahsan Ali Khan
Date Deposited: 24 Sep 2012 11:28
Last Modified: 24 Sep 2012 11:28
URI: http://irep.iium.edu.my/id/eprint/25550

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