为有效解决腔薄壁件的加工变形问题,本文采用三维有限元分析方法,模拟了在给定的装夹条件下,不同的铣削走刀路径对航空薄壁框类零件加工变形精度的影响。仿真结果表明,在保证其他加工条件不变,只改变走刀路径的情况下,零件加工变形存在较大的不同。其中,采用从外向内的加工路径进行铣削加工时产生的变形较其他3种情况要小。最后通过铣削加工实验验证了模拟结果的正确性。 In order to solve the problem of machining deformation of thin-walled parts effectively, this paper uses the three-dimensional finite element analysis method to simulate the influence of different milling path on the machining accuracy of thin-walled frame parts under the given clamping conditions. The simulation results show that under the condition of ensuring the other processing conditions unchanged and only changing the path of the cutting path, there is a big difference in the part machining deformation. Among them, the use of processing path from the outside to the inside of the deformation generated when milling than the other three cases to be small. At last, the correctness of the simulation results is verified by the milling experiment.