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Investigation of Taper Angle in Dry Micro Wire EDM

Mohammad Yeakub Ali 1, Asfana Banu 2, Muhammad Shaffiq 2, Mohamed Abd Rahman 2, Mohamed Konneh 2, and Muhammad Salehan 2
1. Mechanical Engineering Programme Area, Universiti Teknologi Brunei, Gadong BE 1410, Brunei Darussalam
2. Department of Manufacturing and Materials Engineering, International Islamic University Malaysia PO Box 10, 50728 Kuala Lumpur, Malaysia

Abstract—Dry micro wire EDM have been introduced to fabricate complex micro parts with high accuracy. It is a process where gas is used instead of liquid as the dielectric fluid. However, in order to achieve high accuracy, taper angle remains as one of the critical issues. Hence, this paper investigates the effect of process parameters; gap voltage and wire tension; on taper angle in dry micro wire EDM on stainless steel using compressed air as dielectric fluid and tungsten as wire electrode. Empirical model using general factorial method was developed for the estimation of taper angle. Based on the ANOVA, gap voltage has major influence on taper angle. The optimum machining parameters for minimum taper angle were found to be 85 V gap voltage and 14 % wire tension.

Index Terms—dry wire EDM, dry micro wire EDM, taper angle, accuracy

Cite: Mohammad Yeakub Ali, Asfana Banu, Muhammad Shaffiq, Mohamed Abd Rahman, Mohamed Konneh, and Muhammad Salehan, "Investigation of Taper Angle in Dry Micro Wire EDM" International Journal of Mechanical Engineering and Robotics Research, Vol. 8, No. 5, pp. 725-728, September 2019. DOI: 10.18178/ijmerr.8.5.725-728