摘要
通过对涡轮导向叶片及其精铸模型结构特点的分析,以特征映射理论为依据,提取其结构特征、特征内部的约束关系和构成特征的几何元素,将叶片的内外零件模型添加加工余量、工艺附件、收缩率后得到精铸模具设计和制造所需要的模具型腔体模型,从而完成了精铸模具设计各模型间的自动转换,大大缩短了精铸模具的设计周期,具有重要的理论和实践应用价值。
Based on the analysis on the turbine guide vane and the structure characteristic of investment model and the theory of feature mapping, the structure feature, the restriction relationship of inner feature and the geometrical element composing feature are distilled. The die cavity model for the investment casting die design and manufacturing is obtained by adding machining allowance, technical accessories and ratio of shrinkage into inside and outside part model of guide vane. And then the automatic conversion among models of the investment casting die design is realized. This method shortens the design cycle of the investment casting die and has the important value in theory and practical application.
出处
《航空制造技术》
2009年第14期91-93,97,共4页
Aeronautical Manufacturing Technology
关键词
导向叶片
特征映射
模型转换
精铸模具
Guide vane Feature mapping Model conversion Investment casting die