航空发动机叶片加工变形控制方法

航空发动机的性能很大程度上取决于叶片型面的设计和制造水平,进行叶片加工方法研究有助于提高该类零件的加工精度和效率。随着数控技术的发展,目前较大数量的叶片采用数控铣削工艺进行加工,但铣削加工过程中易引起叶片的加工应力变形,影响加工精度。文章分析了叶片加工过程中产生变形的主要原因,并提出了叶片装夹方法优化、加工参数优化、叶片加工变形补偿以及调整加工方法等方法进行改进。

The performance of aero-engine largely depends on the design and manufacturing level of blade profile.The research on blade machining method is helpful to improve the machining accuracy and efficiency of this kind of parts.With the development of numerical control technology,a large number of blades are machined by CNC milling technology,but the machining stress and deformation of blades are easy to be caused in the milling process,which affects the machining accuracy.This paper analyzes the main causes of the deformation in the blade machining process,and puts forward some improvement methods,such as the optimization of blade clamping method,the optimization of machining parameters,the compensation of blade machining deformation and the adjustment of machining method.