USING VIKOR AND RSM-DA IN THE OPTIMIZATION OF DRY TURNING OF 9XC STEEL

Nhat Tan Nguyen; Anh Thang Nguyen; Tien Sy Nguyen; Nhu-Trang le

doi:10.5937/jaes0-43392

Nguyen Nhat Tan Mechanical Technology Department, Vietnam-Japan Center, Hanoi University of Industry, Hanoi, Vietnam
Nguyen Anh Thang Mechanical Technology Department, Vietnam-Japan Center, Hanoi University of Industry, Hanoi, Vietnam
Tien Sy Nguyen Mechanical Technology Department, School of Mechanical and Automotive Engineering, Hanoi University of Industry, Hanoi, Vietnam
Le Nhu Trang Manufacturing Technology Department., Faculty of Mechanical Engineering, University of Economics - Technology for Industries, Hanoi, Vietnam

DOI: https://doi.org/10.5937/jaes0-43392

Keywords: response surface methodology, RSM-DA, VIKOR, dry cutting, optimization, DFA

Abstract

Dry turning is an effective method for reducing the production costs and environmental impact of machining processes. In this study, the effect of cutting speed (V_c), feed rate (f_z), and depth of cut (a_p) on the surface roughness (R_a) and material removal rate (MRR) of 9XC steel during dry turning was investigated. A Box-Behnken experimental design was employed to analyze the main effects and interaction effects of these cutting parameters. In this research, the combining Response Surface Methodology - Desirability Approach (RSM-DA) and VIseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) method were both employed for solving multiple objective optimization problems, and their performance was compared. The results from both methods can be assessed based on their ability to identify the optimal set of parameters that simultaneously optimize surface quality and production rate, as well as their computational efficiency and ease of implementation. Both RSM-DA and VIKOR have been found effective for solving multi-objective optimization problems, such as optimizing cutting parameters in dry turning. While RSM-DA is a statistical tool that combines multiple objectives into a single function, VIKOR is a decision-making method that ranks alternatives based on multiple criteria. The choice of which method to use depends on the specific requirements of the problem and the availability of resources for implementation. The research results show that both VIKOR and RSM-DA are suitable for solving the multi-objective optimization problem of the turning process. According to the VIKOR method, the optimum cutting conditions were found to be a cutting speed V_c of 120 m/min, a depth of cut a_p of 0.1 mm a feed rate f_z of 0.06 mm/rev, and, which resulted in a surface roughness of 0.209 um and a material removal rate of 0.72 cm³/min. Meanwhile, RSM-DA predicts the optimal R_aand MRR values of 0.254 um and 3.36 cm₃/min, respectively; corresponding to the Vc of 180m/min, f_z of 0.06mm/rev and a_p of 0.3mm; That means, the increasing the value of surface roughness by 21.5% will increase the MRR by 366.7%. The findings of this study can provide guidance for selecting the appropriate cutting parameters for dry turning of 9XC steel to achieve desired surface roughness R_a and material removal rate MRR in the specific case.

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