A multi-objective optimization method for precision milling parameters of variable cross-section scrolls was proposed based on the improved NSGA-Ⅱ algorithm. The experiments were designed using the multi-factor orthogonal experimental method to investigate the interaction effects of milling parameters on surface roughness and main milling forces. The regression models of the objective functions were established and validated through goodness-of-fit tests and residual distribution analyses. A multi-objective mathematical optimization model was formulated based on three objectives: minimizing surface roughness, minimizing main milling forces, and maximizing material removal rates. An adaptive crossover and mutation operator was incorporated into the NSGA-Ⅱ algorithm to obtain the pareto-optimal solution set and determine the best combination of milling parameters. Finally, the effectiveness of the algorithm was validated through milling experiments on scrolls. The experimental results indicate that the improved NSGA-Ⅱ algorithm significantly enhances the machining performance. Compared with the non-optimized parameters, the surface roughness of the scroll is reduced by 8.19%, the milling force is reduced by 12.61%, and the material removal rate is increased by 25.81%.
WANGJ, LIZ, HOUR, et al. Geometric and Thermodynamic Analysis of a Novel Fully Meshing Double-scroll Compressor[J]. International Journal of Refrigeration, 2024, 164: 109-299.
[2]
MARCHANTE-AVELLANEDAJ, CORBERANJ, NAVARRO-PERISE, et al. A Critical Analysis of the AHRI Polynomials for Scroll Compressor Characterization[J]. Applied Thermal Engineering, 2023, 219: 1-18.
XUJiangyan, ZHONGGaoyan, YANGShoufeng. Improved NSGA-Ⅱ Algorithm and Its Application in Optimization of Machining Parameters. Computer Engineering and Applications, 2017, 53(13): 227-234.
[7]
FANM, ZHOUX, SONGJ. Experimental Investigation on Cutting Force and Machining Parameters Optimization in In-situ Laser-assisted Machining of Glass–ceramic[J]. Optics & Laser Technology, 2024, 169: 110109.
HANJiang, LIZhenfu, TIANXiaoqing, et al. Research on Prediction and Control Method of Workpiece Tooth Flank Texture during Internal Gear Power Honing[J]. China Mechanical Engineering, 2023, 34(1): 10-16.
[10]
TANGJ, HANJ, TIANX, et al. Flexible Modification and Texture Prediction and Control Method of Internal Gearing Power Honing Tooth Surface[J]. Advances in Manufacturing, 2024.
[11]
CHENGD, XUF, XUS, et al. Minimization of Surface Roughness and Machining Deformation in Milling of Al Alloy Thin-walled Parts[J]. International Journal of Precision Engineering and Manufacturing, 2020, 21: 1597-1613.
[12]
RINGGAARDK, MOHAMMADIY, MERRILDC, et al. Optimization of Material Removal Rate in Milling of Thin-walled Structures Using Penalty Cost Function[J]. International Journal of Machine Tools and Manufacture, 2019, 145(10): 1-15.
[13]
LIM, HUANGJ, DINGW, et al. Dynamic Response Analysis of a Ball-end Milling Cutter and Optimization of the Machining Parameters for a Ruled Surface[J]. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2019, 233(2): 588-599.
SUNYongji, LIUTao. Research on High Speed Machining Complex Scroll Profiles of Scroll Compressor[J]. Modern Manufacturing Engineering, 2017 (7): 25-30.