摘要
提出了一种基于改进NSGA-Ⅱ算法的变截面涡旋盘精密铣削参数多目标优化方法。利用多因素正交试验法设计实验,分析了铣削参数交互作用对表面粗糙度和主铣削力的影响。建立了目标函数的回归模型,并通过拟合度检验和残差分布分析等方式验证了其有效性。基于表面粗糙度最小、主铣削力最小和材料去除率最大三个优化目标构建了多目标优化数学模型,并在NSGA-Ⅱ算法中引入自适应交叉变异算子,以获取Pareto最优解集,最终确定了最佳铣削加工参数组合。最后通过涡旋盘加工实验验证了算法的有效性。实验结果表明,改进后的NSGA-Ⅱ算法显著优化了加工效果,与优化前相比,涡旋盘表面粗糙度减小8.19%,铣削力减小12.61%,材料去除率增大25.81%。
A multi-objective optimization method for precision milling parameters of variable crosssection scrolls was proposed based on the improved NSGA-Ⅱalgorithm.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 multiobjective 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-Ⅱalgorithm 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-Ⅱalgorithm 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%.
作者
党旭
刘涛
闫敏
徐智为
DANG Xu;LIU Tao;YAN Min;XU Zhiwei(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou,730050)
出处
《中国机械工程》
北大核心
2025年第12期2854-2861,共8页
China Mechanical Engineering
基金
国家自然科学基金(52265034)。
关键词
变截面涡旋盘
正交试验
铣削参数
改进NSGA-Ⅱ算法
多目标优化
variable cross-section scroll
orthogonal test
milling parameter
improved NSGA-Ⅱalgorithm
multi-objective optimization
