Effect of discharge current and electrode size on material removal rate and wear ratio in electrical discharge machining

Khan, Ahsan Ali and Ali, Mohammad Yeakub and Haque, Md. Mohafizul (2010) Effect of discharge current and electrode size on material removal rate and wear ratio in electrical discharge machining. International Journal of Mechanical Engineering, 7 (1). pp. 81-90. ISSN 1823-5514

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Abstract

In the present study the effect of electrode size and discharge current on material removal rate (MRR) and wear ratio (WR) during electrical discharge machining has been investigated. The work and electrode materials were mild steel and copper respectively. The diameters of the cylindrical electrodes were 9, 15, 20 and 30 mm. Experiments were conducted for three current values of 2.5, 3.5, and 6.5 A. MRR and WR were analyzed with respect to current density. Both MRR and WR were found to increase with the increase of current density. The trend lines are also expressed by two degree parabolic plots and equations. The models were found to be significant with the R-squared and p-values of 0.95 and 0.0001 respectively. Higher current density produces sparks of higher thermal energy which increases MRR and WR. For a constant current, an electrode of smaller diameter exhibited a higher MRR as well as WR.

Item Type:	Article (Journal)
Additional Information:	3129/2426
Uncontrolled Keywords:	EDM, Material removal rate, MRR, Electrode wear rate, EWR, Wear ratio, WR, Electrode diameter, Current density
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures
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. Ir. Dr. Mohammad Yeakub Ali
Date Deposited:	13 Sep 2011 16:27
Last Modified:	14 Jun 2017 11:15
URI:	http://irep.iium.edu.my/id/eprint/2426

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