In order to accurately improve and predict chatter stability region of machining process, an optimization method of machining process with non-uniform allowance of integral impeller was proposed. The modal parameters of the workpiece process system were obtained using the finite element analysis. Based on the regenerative chatter analysis theory, a limit comparison diagram of the stability with uniform allowance and non-uniform allowance was established. The simulation results showed that the non-uniform allowance natural frequency is about 1.43 times as much as the uniform allowance natural frequency, and the machining system stiffness non-uniform allowance is twice as much as the uniform allowance, while the limit of chatter stability region is increased by 3 times. This article studied uniform allowance and non-uniform allowance of milling chatter stability with experimental method. Tool path for five-axis machining and machine tool simulation based on NX CAM were planned. The comparisons of cutting processing uniform allowance and non-uniform allowance were done, and the surface profile detection of the test part with the three-dimensional scanning was carried out. The experimental results showed that the average optimization rate for manufacturing precision of blade suction surface after optimization and pressure surface was 63.8% and 48.84%. The total experiment showed that this process optimization strategy could effectively improve the stiffness of the integral impeller blade and reduce the cutting chatter of the blade during the cutting process.

为了准确改善和预测加工过程的颤振稳定区域，提出了整体叶轮不等余量加工过程的优化方法。通过有限元分析获得了工件加工系统的模态参数。基于再生颤振分析理论，建立了均匀余量和非均匀余量稳定性的极限对比图。仿真结果表明，非均匀余量固有频率约为均匀余量固有频率的1.43倍，加工系统刚度非均匀余量为均匀余量的2倍，而颤振稳定区域的极限增加了3倍。本文用实验方法研究了均匀余量和非均匀余量对铣削颤振稳定性的影响。规划了五轴加工刀具路径和基于NX CAM的机床仿真。进行了切削加工均匀余量与非均匀余量的比较，并对试验件进行了三维扫描表面形貌检测。实验结果表明，优化后的叶片吸力面和压力面制造精度平均优化率为63.8%和48.84%。总体实验表明，该工艺优化策略能够有效提高整体叶轮叶片的刚度，减少叶片在切割过程中的切割颤动。