Investigation of the Machining Parameters and the Environment of Polyamide 6 on Surface Roughness Using Experimental and Statistical Methods
Shaheen W.H.A. Salman M. Tolephih M.H. Alsharifi T. Abd Al-Sahb W.S. Abdullah O.I.
8 December 2025Dr D. Pylarinos
Engineering, Technology and Applied Science Research
2025#15Issue 628454 - 28459 pp.
This study investigates experimentally and statistically the influences of the Machining Parameters (MPs) and environments on the surface roughness (Ra) of Polyamide 6 (PA6) during the turning operation. The experiments were conducted using a lathe machine, carbide cutting tool, and roughness tester. The statistical approach was implemented using Taguchi Experiment Design (TED) and Analysis of Variance (ANOVA). The parameters and their values were: cutting velocity (VC) of 125, 200, and 250 m/min; feed rate (FR) of 0.05, 0.1, and 0.15 mm/rev; and cutting depth (DC) of 2, 4, and 6 mm. The environments used were: dry (D), compressed air (A), and air-water mixture (A+W). The research aimed to improve the cutting surface quality of PA6 based on the R criterion. The results revealed that the FR is the most influential factor on R compared to other factors. The effect percentages on R were 61%, 15%, 13%, and 11% for FR, Machining Environments (MEs), DC, and VC, respectively. The optimum combination has been achieved based on an FR of 0.05 mm/rev, air with water, a DC of 2 mm, and a VC of 125 m/min, providing a minimum total average surface roughness (Ra) of 1.2 μm for PA6. The study demonstrates that an optimum combination can enhance the cutting surface quality, reduce the machining costs, and provide a pathway for producing high-performance PA6 components.
ANOVA , cutting depth , cutting velocity , feed rate , machining environment , Polyamide 6 , surface roughness , Taguchi design
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Department of Automated Manufacturing Engineering, Al-Khwarizmi College of Engineering, University of Baghdad, Baghdad, Iraq
Al-Naji University, Baghdad, Iraq
Department of Mechanical Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq
Department of Energy Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq
College of Engineering, Al-Naji University, Baghdad, Iraq
Department of Mechanics, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Department of Automated Manufacturing Engineering
Al-Naji University
Department of Mechanical Engineering
Department of Energy Engineering
College of Engineering
Department of Mechanics
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