2014 : Optimization of recast layer thickness and surface roughness in the wire EDM process of AISI H13 tool steel using Taguchi and fuzzy logic

Ir. Bobby Oedy Pramoedyo S. MSc., Ph.D.
Dr. Ir. Helena Carolina Kis Agustin DEA
Bambang Pramujati ST, MSc.Eng, Ph.D


Abstract

Article PreviewArticle PreviewIn this study, the optimization of recast layer thickness and surface roughness (SR) simultaneously in a Wire-EDM process by using Taguchi method with fuzzy logic has been applied. The Wire-EDM process parameters (arc on time, on time, open voltage, off time and servo voltage) were optimized with considerations of multiple performance characteristics, ie, recast layer thickness and SR. Based on the Taguchi method, an L 18 mixed-orthogonal array table was chosen for the experiments. Fuzzy reasoning of the multiple performance characteristics has been developed based on fuzzy logic, which then converted into a fuzzy reasoning grade or FRG. As a result, the optimization of complicated multiple performance characteristics was transformed into the optimization of single response performance index. Experimental results have shown that machining performance characteristics of …