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为提高航空发动机压气机叶片的加工质量,对其铣削加工中的质量影响因素进行了分析,包括加工前工艺规划及几何造型等因素、加工过程中变形与稳定性等问题以及加工后的残余应力变形等。针对必然存在的加工误差,提出了一种概率统计方法,并在此基础上对于影响气动性能的叶型关键几何区域,建立了有关轮廓误差和叶型参数误差的统计分析方法。借助于气动性能试验,获得了稳定工况下关键参数的误差分布,从而为指导叶片的实际铣削加工提供了理论依据。
In order to improve the processing quality of the aero-engine compressor blades, the quality influencing factors in the milling process are analyzed, including the process planning and geometric modeling before processing, the deformation and stability during the processing, the residual stress after processing Deformation and so on. Aiming at the inevitable processing error, a probabilistic statistical method is proposed. On the basis of this, a statistical analysis method about the contour error and the error of the blade parameters is established for the key geometric area of the blade that affects the aerodynamic performance. With the aid of the aerodynamic performance test, the error distribution of the key parameters under steady conditions was obtained, which provided a theoretical basis for guiding the actual milling of the blade.