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Reducing electrode wear using cryogenic cooling during electrical discharge machining

Abdulkareem, Suleiman and Ali Khan, Ahsan and Konneh, Mohamed (2010) Reducing electrode wear using cryogenic cooling during electrical discharge machining. Advanced Materials Research, 83-86. pp. 672-679. ISSN 1022-6680

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In electrical discharge machining (EDM), material is removed by a series of electrical discharge between the electrode (tool) and the workpiece that develops a temperature of about 8,0000C to 12,0000C. Due to high temperature of the sparks, work material is melted and vapourized, at the same time the electrode material is also eroded by melting and vapourization. Electrodes wear (EW) process is quite similar to the material removal mechanism as the electrode and the workpiece are considered as a set of electrode in EDM. In the present study effort has been made to reduce EW by cooling, using liquid nitrogen during the EDM of titanium alloy. Investigation on the effect of cooling on electrode wear (EW), material removal rate (MRR) and surface roughness (Ra) of the workpiece was carried out. Current (I), pulse on-time (ton), pause offtime (toff) and voltage (v) were considered as the machining parameters. Design of experiment (DOE) was used to design the experimental works. Cooling of electrode by this technique reduced the melting and vapourization of electrode material and enhances electrode life. It was possible to reduce EW up to 27% by applying this technique while MRR and Ra were improved by 18% and 8% respectively.

Item Type: Article (Journal)
Additional Information: 3129/3246
Uncontrolled Keywords: Cooling; Electrode wear; EDM; Liquid Nitrogen
Subjects: T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Dr Mohamed Konneh
Date Deposited: 10 Oct 2011 12:12
Last Modified: 09 Feb 2012 12:23
URI: http://irep.iium.edu.my/id/eprint/3246

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