Aiming at the problem of error evaluation when the processing environment of the automatic pro-duction line of the precision forging aeroengine blade is relatively poor, an optimal matching algorithm of the measuring point set and the theoretical truncation line is proposed according to the cross section method com-monly used in the domestic blade actual inspection. The method includes the initial match, the exact match and the matching optimization of the measurement point set and the theoretical stub. In order to obtain a more precise leaf shape error, a new algorithm for finding the closest point set between the measurement point set and the theoretical stub is suggested based on the relationship of the measurement point set and the theoretical section line. The examples were used to verify the effectiveness and practicality of the proposed method,im-proves the detection efficiency and improve the measurement accuracy, the data provide a basis for subse-quent finishing process.%针对航空发动机精锻叶片自动化生产线加工环境相对较差时的误差评定问题,根据国内叶片实际检测中常用的截面法检测,提出了测量点集与理论截线的优化匹配算法.该方法包含测量点集与理论截线的初步匹配、精确匹配、匹配优化,并为了得到更精确的叶型误差,根据测量点集与理论截面线之间的关系,提出了一种测量点集到理论截线的最近点集求解算法.通过实例验证了该方法的实用性和有效性,提高了检测效率,提升了测量精度,为后续精加工处理提供数据依据.
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