中文摘要：

针对航空铝合金薄壁件加工变形的问题,采用三维有限元方法,仿真分析加工形态（材料去除率、构件框数和铣削深度）对铝合金薄壁件加工变形的影响,并通过铣削实验对仿真结果的准确性进行验证。研究结果表明：构件长度方向翘曲变形量随着宽度方向材料去除率减小而减小;随着长度方向材料去除率减小,构件宽度方向变形量减小,而长度方向的变形量基本不变;当构件材料去除率大于85%时,材料去除率一致,框数不一致,构件底面翘曲变形量基本一致;当材料去除率小于85%时,同材料去除率的多框体变形比单框体的变形大;随着铣削深度增大,框类件长度和宽度方向变形量都是先增大后减小;模型仿真计算变形量与实验结果较吻合,本研究可为控制薄壁件加工变形提供参考。

英文摘要：

In view of the milling deformation of aeronautical thin-walled workpiece, the influence of processing form（material removal rate, milling slot number and milling depth） on milling deformation was simultaneously analyzed by using finite element method. The accuracy of the simulation results was verified by the experiment. The results show that when material removal rate in width direction decreases, the bend deformation in length direction drops. When material removal rate in length direction decreases, the deformation in width direction decreases, but the deformations in length direction are uniform. When material removal rate is greater than 85%, bend deformation is the same at different slot numbers. When material removal rate is less than 85%, the deformations of the multi-frame components are bigger than those of the single-frame components. Both length and width bend deformations increase and then decrease with the increase of the milling depth. The simulation results coincide with the experimental results. The study can provide useful references for controlling milling deformation of the thin-walled workpieces.