ABSTRACT A novel method for geometric model reconstruction of a damaged blade is presented to improve the precision machining of aero-engine blade repair. Based on the theoretical model of the blade, the iterative closest point (ICP) algorithm is used to determine the relationship between the measuring points and the theoretical model. Blade deformation mechanisms are analyzed to construct the fitting function of the blade deformation distribution and blade height. The spline interpolation method for local correction is then used to eliminate abrupt changes of the curvature, and it can guarantee the smoothness of the blending surface between the undamaged area and repaired area of the blade. The tool path is planned for the computerized numerical control (CNC) machining of the damaged area. A machining experiment of a repaired blade is carried out, and the machining results verify that the method presented in this paper is valid.

中文翻译：

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叶片损伤修复的几何模型重建与数控加工

摘要 为了提高航空发动机叶片修复的加工精度，提出了一种损伤叶片几何模型重建的新方法。基于叶片的理论模型，采用迭代最近点（ICP）算法确定测量点与理论模型的关系。分析叶片变形机理，构建叶片变形分布与叶片高度的拟合函数。然后采用样条插值法进行局部修正，消除曲率的突变，保证叶片未损伤区与修复区融合面的光滑度。刀具路径是为损坏区域的计算机数控（CNC）加工而设计的。进行了修复叶片的机加工实验，