摘要
A100超高强度钢是飞机起落架的主体材料,也是一种典型的航空难加工材料。为解决其干式高速铣削加工中存在的加工效率低和表面质量难以控制等问题,同时平衡加工效率和表面质量,以材料去除率、表面粗糙度及其信噪比为评价指标,对铣削工艺参数进行多目标优化试验研究。首先,设计了正交试验,根据试验结果分析铣削工艺参数对评价指标的影响规律,建立优化目标预测模型。然后,采用快速非支配排序遗传算法(NSGA-Ⅱ)求解,得到工艺参数的非支配解集。最后,在考虑了加工效率后,通过TOPSIS综合评价法对所得非支配解集进行二次筛选,得到最优工艺参数组合。经对比发现,优化后表面粗糙度相对于优化前最佳值降低了34.52%,同时信噪比提高了7.14%,为合理选择干式高速铣削参数提供了参考依据。
A100 ultra-high-strength steel is the main material of aircraft landing gear and a typical difficult-to-machine aerospace material.In order to solve the problems of low machining efficiency and difficult to control surface quality in its dry high-speed milling processing,and to balance the machining efficiency and surface quality at the same time,the multi-objective optimization experimental research on milling process parameters is carried out with the material removal rate,surface roughness and its signal-to-noise ratio as the evaluation indexes.Firstly,orthogonal experiments were designed to analyze the influence law of milling process parameters on the evaluation indexes based on the experimental results,and establish the optimization target prediction model.Then,the fast non-dominated sorting genetic algorithm(NSGA-II)was used to solve the problem and get the non-dominated solution set of the process parameters.Finally,after considering the machining efficiency,the obtained non-dominated solution set is screened twice by TOPSIS comprehensive evaluation method to obtain the optimal process parameter combinations.After comparison,it is found that the optimized surface roughness is reduced by 34.52%compared to the optimal value before optimization,while the signal-to-noise ratio is improved by 7.14%,which provides a reference basis for the reasonable selection of dry high-speed milling parameters.
作者
贾宗强
白海清
张乐
任泽康
周俊
李高伟
JIA Zongqiang;BAI Haiqing;ZHANG Le;REN Zekang;ZHOU Jun;LI Gaowei(Shaanxi University of Technology,Hanzhong 723001,China;Shaanxi Key Laboratory of Industrial Automation,Hanzhong 723001,China)
出处
《航空制造技术》
北大核心
2025年第23期79-87,95,共10页
Aeronautical Manufacturing Technology
关键词
超高强度钢
高速铣削
表面粗糙度
多目标优化
正交试验
非支配排序遗传算法(NSGA-Ⅱ)
Ultra-high strength steel
High speed milling
Surface roughness
Multi-object optimization
Orthogonal test
Non-dominated sorting genetic algorithm(NSGA-II)
