关键词: 自适应采样, 变误差补偿, 双线性插值, 自适应加工, 叶片

Abstract: Blades serve as important components in aircraft engines,and their machining quality has a significant impact on engine performance. To address the issue of exceeding tolerances at certain positions after blade machining,it investigates error compensation in blade machining. First,based on the curvature changes of the blade profile in the U and V directions,adaptive sampling and equal parameter sampling are used to complete the planning of blade measurement points. Then,contact on-machine measurement is used to obtain the error between the theoretical profile and the actual profile. Based on the limited error data obtained from measurements,bilinear interpolation is used to calculate the error at each tool contact point. Finally,the theoretical toolpath is adjusted based on the error at each tool contact point to derive the compensated toolpath. Through an experimental study on a specific model of engine blade,the maximum contour error is reduced from 0.076 mm before compensation to 0.040 mm after compensation. The compensated blade contour now meets the precision requirements,validating the effectiveness of the compensation method.

Key words: adaptive sampling, error compensation, bilinear interpolation, adaptive machining, blade