航空发动机叶片粗糙度测量方法研究

Research on measurement method of aeroengine blade roughness

航空发动机叶片表面弯扭大,加工过程中难以保证表面粗糙度一致。针对现阶段粗糙度测量方法在测量叶片时缺少测量位置和方向的定义,导致测得的粗糙度值无法判定叶片粗糙度合格性的问题,开展了叶片粗糙度测量方法研究。基于叶片实测截面数据,利用坐标测量机上搭载的粗糙度测头,通过对不同类型的叶片进行多位置多方向的粗糙度测量实验,分析不同位置、不同方向的粗糙度测量结果差异,得到了叶片粗糙度测量方法。本方法将叶片粗糙度与叶片型面相关联,解决了叶片粗糙度的测量位置和测量方向缺乏规范的问题。研究结果对准确、有效、规范地评估叶片表面质量的合格性具有重要意义。

The surface of aero⁃engine blades has large bending and torsion,and it is difficult to ensure consistent surface roughness during machining.In view of the lack of definitions of measuring position and direction in the current roughness measurement method when measuring blades,which leads to the problem that the measured roughness value cannot determine the eligibility of blade roughness,the research on blade roughness measurement method is carried out.Based on the measured section data of blades,using the roughness probe carried on the CMM,the blade roughness measurement method is obtained by carrying out multi⁃position and multi⁃direction roughness measurement experiments on different types of blades and analyzing the difference of the roughness measurement results in different positions and directions.This method associates the blade roughness with the blade profile,and solves the problem that the measurement position and direction of blade roughness are not standardized.The research results are of great significance to accurately and effectively evaluate the qualification of blade surface quality.