摘要
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。
Aiming to improve the machining quality of compressor blade of aeroengine,the influencing factors of blade machining are analyzed,including processing plan and geometric modeling before machining,the problems of deformation and stability during machining,the residual stress after machining. For the inevitable existence of machining error,the probability statistics method is presented in the paper. In detail,the statistical analysis method of contour error and airfoil parameters error in the key region of blade is established. With the help of aerodynamic experiments,the error distribution of the key parameters under stable condition is found to provide the theoretical basis for guiding the specific blade processing.
出处
《航空制造技术》
2017年第15期38-44,共7页
Aeronautical Manufacturing Technology
基金
国家科技重大专项资助项目(2015ZX04001202)
关键词
叶片
加工误差
叶型参数
统计分析
Blade
Machining error
Airfoil parameter
Statistical analysis
