Thin-walled blades are widely used in aviation and aerospace industry, the measurement and modeling are the key process of reverse manufacturing.According to geometric features of blade, contour measurement method is used to measure blade surface.The key technology of modeling process is studied.The works on measurement and modeling of blade surface are carried out, including the method of the probe radius compensation, eliminating of bad points, creating the leading and trailing edge by single-arc method, creating the section curves of the suction side and the pressure side by NURBS curve method, jointing section curves of suction(pressure)side and the leading(trailing) edge, and creating of the equidistant curves.Finally, a solid model is generated through a measurement example, and the quality and precision of blade surface are excellent.This method is proved simple and easy to apply.%叶片类零件被广泛应用于航空航天领域,其测量建模是逆向制造的关键.根据叶片类零件的几何结构特征,采用等高法测量叶片型面,对其建模过程中的关键技术进行研究.研究了叶片型面测量建模过程中的测头半径补偿方法,测量坏点的剔除,利用单圆弧法构造缘头截面线以及利用NURBS曲线方法构造叶盆、叶背截面线,并实现叶盆(背)截面线与缘头的搭接和等距线的构造.最后通过实例测量生成实体模型,叶片型面质量和精度良好.结果表明,该方法简单实用、使用方便.
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