Investigation of the Optimal Machining Parameters on Wire Electrical Discharge Machine by Taguchi Technique
DOI: 10.14416/j.ind.tech.2021.04.002
Keywords:
Material removal rate (MRR), Feed rate (FR), Surface roughness (SR), Taguchi method, Wire electrical discharge machining (WEDM)Abstract
This paper focused on the effect of process parameters on material removal rate (MRR), feed rate (FR) and surface roughness (SR) of machining titanium by wire electrical discharge machine (WEDM). The Taguchi method had been used based on L9 orthogonal array to find out the optimal process parameters. This work also investigated the influences of machining parameters including peak current, wire-speed, wire tension and voltage. The experiment was analyzed by Minitab 16 which observed that the peak current was the most influential factor for MRR, FR and SR. However, the wire speed was significant to the feed rate. The optimum parameters of obtained MRR, FR and SR were 20.57 mm3/min, 22.43 mm/min and 1.74 mm, respectively. Thereafter, the scanning electron microscope (SEM) was used to identify the microstructure of the workpiece. It could be seen that craters had more by the high discharge of thermal energy that caused the formation of larger cracks and craters, leading to an increase in surface roughness.
References
[2] M. Sharanya Nair and M.N. Joshi, A review on wire electrical discharge machining (WEDM) of composite materials, International Journal of Engineering Trends and Technology, 2014, 17(9), 415-420.
[3] K. Jangra and S. Grover, Modelling and experimental investigation of process parameters in WEDM of WC-5.3 % Co using response surface methodology, Mechanical Sciences, 2012, 3(2), 63-72.
[4] A.R. Prasad, K. Ramji and B.R. Kumar, Study of wire-electrical discharge machining parameters of titanium alloy by using Taguchi method, International Journal of Engineering and Technology, 2018, 7(2.8), 10-12.
[5] P. Nakwong and T. Subboon, Effects of peak current and nozzle offset distance on wire electrical discharge machining of titanium, The Journal of Industrial Technology, 2020, 16(1), 93-104. (in Thai)
[6] M.A.R. Khan, M.M. Rahman, K. Kadirgama, M.A. Maleque and M. Ishak, Prediction of surface roughness of Ti-6Al-4V in electrical discharge machining: A regression model, Journal of Mechanical Engineering and Sciences, 2011, 1, 16-24.
[7] V. Singh, R. Bhandari and V.K Yadav, An experimental investigation on machining parameters of AISI D2 steel using WEDM, The International Journal of Advanced Manufacturing Technology, 2016, 93(1-4), 203-214.
[8] A.V.S. Prasad, K. Ramji and G. Datta, An experimental study of wire EDM on Ti-6Al-4V Alloy, Procedia Materials Science, 2014, 5, 2567-2576.
[9] J. Kumar and J.S. Khamba, An experimental study on ultrasonic machining of pure titanium using designed experiments, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2008, 30(3). 231-238.
[10] A. Kumar, V. Kumar and J. Kumar, An investigation into machining characteristics of commercially pure titanium (grade-2) using CNC WEDM, Applied Mechanics and Materials, 2012, 159, 56-68.
[11] P.J. Ross, Taguchi techniques for quality engineering. McGraw-Hill, NY, US, 1988.
[12] M. Manjaiah, S. Narendranath and J. Akbari, Optimization of wire electro discharge machining parameters to achieve better MRR and surface finish, Procedia Materials Science, 2014, 5, 2635-2644.
[13] A. Alias, B. Abdullah and N. Abbas, WEDM: Influence of machine feed rate in machining titanium Ti-6al-4v using brass wire and constant current (4A), Procedia Engineering, 2012, 41, 1812-1817.
[14] P.S. Rao, K. Ramji and B. Satyanarayana, Experimental investigation and optimization of wire EDM parameters for surface roughness, MRR and white layer in machining of aluminium alloy, Procedia Materials Science, 2014, 5, 2197-2206.
[15] M. Modi, G. Agarwal, S.D. Chaugaonkar, U. Bhatia and V. Patil, Effect of machine feed rate on kerf-width, material removal rate, and surface roughness in machining of Al/SiC composite material with wire electrical discharge machine, Strojniski Vestnik/Journal of Mechanical Engineering, 2020, 70(1), 81-88.
