Experimental investigation of stainless steel by using electrical discharge machine (EDM)

Mohmad Daud, Nur Rashidah (2014) Experimental investigation of stainless steel by using electrical discharge machine (EDM). Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

	Text (24 Pages) EXPERIMENTAL INVESTIGATION OF STAINLESS STEEL BY USING ELECTRICAL DISCHARGE MACHINE EDM 24pages.pdf - Submitted Version Download (1MB)
	Text (Full Text) Experimental investigation of stainless steel by using electrical discharge machine (EDM) - Nur Rashidah Mohmad Daud.pdf - Submitted Version Restricted to Repository staff only Download (2MB)

Abstract

Electrical Discharge Machining (EDM) is one of the advanced machining processes, based on thermo electric energy between the workpiece and tool. Normally, EDM used to machine high hardness materials and complex shape. In this research, the effect of the micro and nano size of carbon powder additive into dielectric fluid on the stainless steel was investigated by using EDM process. In the experiment, EDM machine model SODICK AQ35L was used to machine stainless steel material by using copper electrode. The weight of the workpiece and electrode were recorded before and after the experiment by using Precise Digital Balance in order to obtain Material Removal Rate (MRR) and Tool Wear Rate (TWR). While, the surface roughness of the workpiece (stainless steel) was examined using Mitutoyo SJ-301 surface roughness tester and the spark gap was examined using stereo microscopic. It was found that when nano size of carbon powder was mixed into the dielectric fluid, higher material removal rate (MRR), lower tool wear rate (TWR), and smoother surface roughness can be obtained compared to the micro size of carbon powder. Addition of nano size of powder also can reduce insulating strength of dielectric fluid and result to a bigger spark gap.

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