国产7050铝合金薄壁承力框车削残余应力变形控制研究  

Research on residual stress and deformation control of domestic 7050 aluminum alloy thin-wall bearing frame turning

作　　者：胡越 张晟玮 蒋睿嵩 黄崇湘 HU Yue;ZHANG Shengwei;JIANG Ruisong;HUANG Chongxiang(School of Aeronautics and Astronautics,Sichuan University,Chengdu 610065,China;Engineering Technology Center,AECC Chengdu Aero-Engine Co.,Ltd.,Chengdu 610503,China;School of Mechanical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学空天科学与工程学院,成都610065 [2]中国航发成都发动机有限公司工程技术中心,成都610503 [3]四川大学机械工程学院,成都610065

出　　处：《航空工程进展》2025年第2期134-141,共8页Advances in Aeronautical Science and Engineering

基　　金：四川省科技计划资助(2021ZDZX0001,2021ZDZX0002)。

摘　　要：研究国产7050铝合金航空薄壁承力框零件车削加工的变形控制,在减小径向变形的情况下保证车削效率,可显著提升零件的加工精度与使用性能。建立三维车削残余应力仿真模型,通过实验验证国产7050铝合金薄壁承力框车削仿真模型的准确性;基于三维车削仿真模型开展正交实验,建立车削参数与车削残余应力的映射模型;以车削效率和残余应力为优化目标,基于遗传算法获得优化的国产7050铝合金航空薄壁承力框车削参数。结果表明:优化后加工表面残余应力降低至15.6 MPa,承力框最大径向变形量为1.59 mm,相比原车削参数变形量减小了约19%,达到了控制和优化国产7050铝合金航空薄壁承力框加工变形的目的。Researching the deformation control of domestic 7050 aluminum alloy aviation thin-walled bearing frame parts during turning processing is crucial for ensuring machining precision and performance while maintaining cut-ting efficiency with minimized radial deformation.Initially,a three-dimensional turning residual stress simulation model is established and validated through experiments for the accuracy of the domestic 7050 aluminum alloy thinwalled bearing frame turning simulation model.Subsequently,an orthogonal experiment is conducted based on the three-dimensional turning simulation model to establish a mapping model between turning parameters and residual stress.Finally,with the objectives of turning efficiency and residual stress optimization,optimized turning parame-ters for the domestic 7050 aluminum alloy aviation thin-walled bearing frame are obtained using a genetic algo-rithm.The results show that the optimized machining surface residual stress is reduced to 15.6 MPa,and the maxi-mum radial deformation of the bearing frame is 1.59 mm,which is about 19%less than the original turning parame-ters,achieving the goal of controlling and optimizing the processing deformation of the domestic 7050 aluminum al-loy aviation thin-walled bearing frame.

关 键 词：国产7050铝合金 航空薄壁件 加工变形 车削残余应力 变形优化 

分 类 号：V261.21[航空宇航科学与技术—航空宇航制造工程]