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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2013

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Application of Taguchi design method to optimize the electrical discharge machining

Chen D.C., Jhang J.J., Guo M.W.

Journal of Achievements in Materials and Manufacturing Engineering

2013

Vol. 57, nr 2

76--82

Purpose: The current study utilizes the Taguchi design methodology to optimize the EDM processing parameters for the machining of A6061-T6 aluminum alloy. The experimental trials consider four EDM parameters, namely the pulse current (PC), the pulse-on duration (ON), the duty cycle (DC), and the machining duration (MD). Design/methodology/approach: The machined specimens are observed using the surface roughness is measured using a commercial profilometer. The optimal machining parameters and the relative influence of each parameter on the surface roughness are determined by analyzing the experimental data using the analysis of means (ANOM) and analysis of variance (ANOVA) techniques. Findings: The results show that the magnitude of the surface roughness is determined primarily by the pulse current (PC) and duty cycle (DC) parameters. A CuZn40 brass alloy specimen is machined using the optimal processing parameters and is found to have a lower mean surface roughness than the A6061-T6 workpiece. Research limitations/implications: Practical implications: The general applicability of the optimal machining parameters is investigated by machining a CuZn40 alloy specimen under the optimal conditions and then comparing the surface roughness characteristics of the machined surface with those of the A6061-T6 specimen. Originality/value: It is inferred that the optimal machining parameters established using the Taguchi design methodology have a good general applicability to the EDM machining of both aluminum and brass alloys.