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叶片的加工精度及其稳定性对航空发动机的性能有直接的影响,然而,其加工难度较大,型面轮廓精度和表面质量很难稳定地达到设计要求。为此,国内外研究者提出了许多叶片加工变形的控制方法。在深入分析叶片变形形成机理的基础上,对现有的叶片加工变形控制方法进行分类总结和分析,阐述了不同叶片变形控制方法的原理和特点。同时,结合目前叶片的结构特点、材料特性和主要加工工艺难题指出,控制叶片型面的加工残余应力变形是实现20μm级叶片型面加工精度的关键,并且指出利用超硬砂轮悬臂高速磨削加工是实现中小型叶片型面综合变形控制的有效方法之一。
However, it is difficult to fabricate the profile and the surface quality of the profile is difficult to meet the design requirements stably. For this reason, many researchers at home and abroad have put forward many control methods for the deformation of the blade. Based on the in-depth analysis of the formation mechanism of blade deformation, the existing blade deformation control methods are classified and analyzed, and the principles and characteristics of different blade deformation control methods are expounded. At the same time, combining the current structural characteristics of the blade, the material properties and the main processing problems, it is pointed out that the control of blade surface machining residual stress deformation is the key to achieve 20μm blade profile machining accuracy, and points out the use of superhard grinding wheel cantilever high speed grinding It is one of the effective methods to realize the comprehensive deformation control of small and medium-sized blade profiles.