航空涡轮叶片精铸模具型腔优化设计系统

The Optimization Design System for Investment Casting Die of Aerofoil-Shaped Turbine Blades

针对航空涡轮叶片精铸模具型腔设计中存在的精度控制问题,开发了航空涡轮叶片精铸模具型面优化设计系统。基于主流的CAD/CAM软件和无损检测平台等,建立多信息融合的精铸模具型面优化设计平台。主要包括基于三维收缩率模型的模具型腔设计和铸件位移场预测、基于位移场预测的模具型腔虚拟修模。在叶片多源测量数据及数值模拟的基础上建立叶片精铸位移场模型,结合反变形补偿设计基本原理,实现模具型面的优化设计。

According to the precision control of mould cavity design for aerofoil-shaped turbo blades, the die profile optimization system for investment casting turbine blades has been built. Based on the mainstream CAD/CAM software and non destruction testing equipments, the investment casting die profile optimization system of the multi-information fusion can be established, which mainly includes the die profile design based on the three dimensional shrinkage model, the displacement field prediction based on the shrinkage model, and the die profile optimization module based on the displacement field prediction. The investment casting displacement field can be gained by the numerical simulation and multiple sources data of turbine blades, combined with the anti-deformation basic principle, the die profile optimization can be realized.