Repair of damaged blade in aero-engine reduces economic losses and has been applied widely in factory areas. However, the actual blade model after service is not consistent with the theoretical model. Thus, the reconstructed blade model is required. Different damage areas, damage forms and operations in the additive process may lead to different deformations of the blades, thus the actual CAD model of the blade is also different, resulting in the challenge when reconstruct the model. In this paper, a new model reconstruction method of blade-repair is proposed based on the linear combination of base curves blending algorithm. Firstly, the blade after additive processing is measured and such data is processed and registered with the theoretical model. Secondly, the area created by measurement data is smoothly blended to the theoretical area utilizing a developed linear combination algorithm, leading to the capability of providing the reconstructed concave and convex surfaces. Finally, the reconstructed concave and convex surfaces are bridged to theoretical leading and trailing edges. Consequently, the intact reconstructed model of the damaged blade is obtained. The blade-repair case study demonstrates the availability of the proposed method and the analysis of machining error indicates that the blending between the reserved area and the theoretical area of the reconstructed model is smooth.

修理航空发动机中损坏的叶片可减少经济损失，并已广泛应用于工厂区域。但是，维修后的实际叶片模型与理论模型不一致。因此，需要重建的叶片模型。附加过程中不同的损坏区域，损坏形式和操作可能导致叶片的不同变形，因此叶片的实际CAD模型也不同，从而在重建模型时面临挑战。本文提出了一种基于基础曲线混合算法线性组合的叶片修复模型重建新方法。首先，对添加处理后的叶片进行测量，并对这些数据进行处理并与理论模型进行配准。其次，利用开发的线性组合算法，可以将由测量数据创建的区域平滑地融合到理论区域，从而具有提供重构的凹凸表面的能力。最后，将重构的凹凸表面桥接到理论上的前缘和后缘。因此，获得了受损叶片的完整重建模型。刀片维修案例研究证明了该方法的可行性，对加工误差的分析表明，保留区域与理论模型的理论区域之间的融合是平滑的。重建的凹凸表面被桥接到理论上的前缘和后缘。因此，获得了受损叶片的完整重建模型。刀片维修案例研究证明了该方法的可行性，对加工误差的分析表明，保留区域与理论模型的理论区域之间的融合是平滑的。重建的凹凸表面被桥接到理论上的前缘和后缘。因此，获得了受损叶片的完整重建模型。刀片维修案例研究证明了该方法的可行性，对加工误差的分析表明，保留区域与理论模型的理论区域之间的融合是平滑的。