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Inspection of blade profile and machining deviation analysis based on sample points optimization and NURBS knot insertion

机译：基于采样点优化和NURBS结插的刀片轮廓和加工偏差分析检查

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摘要

As the core component of aviation industry, the machining accuracy of blade has great impact on the performance of aeroengine. Blade inspection can get knowledge of machining accuracy and can be used to compensate the machining error. In consideration of measuring time and efficiency, measuring trace planning based on sample points optimization (SPO) is introduced, and NURBS knot insertion (NURBS-KI) method is proposed to reconstruct the blade contour. Then, the designed model and the reconstructed model are compared to analyze the machining error. The reconstruction result shows that the presented method can better restore the blade contour, and NURBS-KI algorithm is proved in this paper to be an effective method to reconstruct blade curve and surface based on small number of measurement points. As illustrated in deviation analysis results, the machining error is within the design tolerance, and the finishing allowance can be removed afterwards.
机译：作为航空工业的核心成分，刀片的加工精度对航空发动机的性能产生了很大的影响。 刀片检查可以获得加工精度的知识，可用于补偿加工误差。 考虑到测量时间和效率，引入了基于采样点优化（SPO）的测量跟踪规划，并提出了NURBS结插入（NURBS-KI）方法来重建刀片轮廓。 然后，比较设计的模型和重建模型以分析加工误差。 重建结果表明，所提出的方法可以更好地恢复刀片轮廓，并在本文中证明了NURBS-KI算法是基于少量测量点重建叶片曲线和表面的有效方法。 如偏差分析结果中所示，加工误差在设计公差范围内，之后可以除去精加工余量。

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