Residual stress during the machining process has always been a research hotspot, especially for aero-engine blades. The three-dimensional modeling and reconstructive laws of residual stress among various processes in the machining process of the fan blade is studied in this paper. The fan blades of Ti-6Al-4V are targeted for milling, polishing, heat treatment, vibratory finishing, and shot peening. The surface and subsurface residual stress after each process is measured by the X-ray diffraction method. The distribution of the surface and subsurface residual stress is analyzed. The Rational Taylor surface function and cosine decay function are used to fit the characteristic function of the residual stress distribution, and the empirical formula with high fitting accuracy is obtained. The value and distribution of surface and subsurface residual stress vary greatly due to different processing techniques. The reconstructive change of the surface and subsurface residual stress of the blade in each process intuitively shows the change of the residual stress between the processes, which has a high reference significance for the research on the residual stress of the blade processing and the optimization of the entire blade process.

加工过程中的残余应力一直是研究的热点，特别是对于航空发动机叶片而言。研究了风扇叶片加工过程中各工序残余应力的三维建模及重构规律。Ti-6Al-4V 的风扇叶片用于铣削、抛光、热处理、振动精加工和喷丸处理。每道工序后的表面和亚表面残余应力通过X射线衍射法测量。分析了表面和地下残余应力的分布。利用有理泰勒曲面函数和余弦衰减函数对残余应力分布特征函数进行拟合，得到拟合精度高的经验公式。由于加工工艺不同，表面和亚表面残余应力的值和分布差异很大。叶片各工序表面和亚表面残余应力的重构变化直观地反映了工序间残余应力的变化，对叶片加工残余应力的研究和叶片的优化具有较高的参考意义。整个刀片过程。