Three-dimensional modeling and reconstructive change of residual stress during machining process of milling, polishing, heat treatment, vibratory finishing, and shot peening of fan blade
Three-dimensional modeling and reconstructive change of residual stress during machining process of milling, polishing, heat treatment, vibratory finishing, and shot peening of fan blade
复制标题
风扇叶片铣削、抛光、热处理、振动光整、喷丸加工过程中残余应力的三维建模与重构变化
DOI：
10.1007/s40436-021-00351-4
复制
发表时间：
2021
影响因子：
5.2
通讯作者：
Sun Yunqi
中科院分区：
文献类型：
--
作者：
Zhang Jiyin;Yao Changfeng;Cui Minchao;Tan Liang;Sun Yunqi
机械加工过程中的残余应力一直是研究的热点，尤其是航空发动机叶片。研究了风机叶片加工过程中各工序间残余应力的三维建模与重构规律。Ti-6Al-4V风扇叶片主要用于铣削、抛光、热处理、振动抛光和喷丸处理。用X射线衍射法测定了各工艺处理后的表面和亚表面残余应力。分析了表面和亚表面残余应力的分布情况。利用有理Taylor曲面函数和余弦衰减函数对残余应力分布的特征函数进行了拟合，得到了具有较高拟合精度的经验公式。由于加工工艺的不同，表面和亚表面残余应力的大小和分布有很大差异。叶片表面和亚表面残馀应力在各个工艺过程中的重构变化，直观地显示了各工艺之间残馀应力的变化，对叶片加工残馀应力的研究和整个叶片工艺的优化具有较高的参考意义。
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.