Multi-Objective Optimization of Wire Electro Discharge Machining (WEDM) Process Parameters Using Grey-Fuzzy Approach

  • Partha Protim Das Department of Mechanical Engineering, Sikkim Manipal Institute of Technology, Majitar, Sikkim, India
  • Sunny Diyaley Department of Mechanical Engineering, Sikkim Manipal Institute of Technology, Majitar, Sikkim, India
  • Shankar Chakraborty Department of Production Engineering, Jadavpur University, Kolkata, India
  • Ranjan Kumar Ghadai Department of Mechanical Engineering, Sikkim Manipal Institute of Technology, Majitar, Sikkim, India

Abstract

Wire electro discharge machining (WEDM) is a versatile non-traditional machining process that is extensively in use to machine the components having intricate profiles and shapes. In WEDM, it is very important to select the optimal process parameters so as to enhance the machine performance. This paper emphasizes the selection of optimal parametric combination of WEDM process while machining on EN31 steel, using grey-fuzzy logic technique. Process parameters such as servo voltage, wire tension, pulse-on-time and pulse-off-time were considered while taking into account several multi-responses such as material removal rate (MRR) and surface roughness (SR). It was found that pulse-on-time of 115 µs, pulse-off-time of 35 µs, servo voltage of 40 V and wire tension of 5 kgf results in a larger value of grey fuzzy reasoning grade (GFRG) which tends to maximize MRR and improve SR. Finally, analysis of variance (ANOVA) is applied to check the influence of each process parameters in the estimation of GFRG.

Keywords: WEDM, machining parameters, multi-objective optimization, Grey-fuzzy logic, ANOVA
Published online
2018-11-16
How to Cite
Das, P., Diyaley, S., Chakraborty, S. and Ghadai, R. (2019) “Multi-Objective Optimization of Wire Electro Discharge Machining (WEDM) Process Parameters Using Grey-Fuzzy Approach”, Periodica Polytechnica Mechanical Engineering, 63(1), pp. 16-25. doi: https://doi.org/10.3311/PPme.12167.
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Articles