本文介绍针对混流式叶片热模压成型工艺中需要解决的叶片展开及有关压模设计的计算问题,基于叶片曲面三维几何造型,进行均化和密化处理,并加上一些工程约束,建立展开的数学模型;采用带工程约束的几何近似展开方法和算法。开发了相应的软件,已用于对高中低速转轮叶片展开及压模型线计算。 This paper introduces the calculation of blade expansion and related die design which is to be solved in the process of hot-press molding of mixed flow vane. Based on the three-dimensional geometric modeling of the blade surface, the homogenization and densification are processed and some engineering constraints are added to establish the unfolded Mathematical model; geometric approximation method and algorithm with engineering constraints. Developed the corresponding software, has been used for high school low-speed runner blade expansion and die line calculation.