球墨铸铁三通阀铸造工艺分析及优化

Casting Process Analysis and Optimization of Ductile Iron Hydraulic Tee Valves

某小型球铁液压三通阀铸件浇注时存在飞溅、冲砂现象,批量生产时,铸件有铁豆、夹砂等铸造缺陷,而且铸件出品率低。通过采取降低叠箱串铸高度、修改浇注系统设计的措施加以改进,并利用AnyCasting软件对改进后的铸造工艺方案进行数值模拟和生产验证。结果表明,改进后的铸造方案在减少缺陷及提高成品率等方面均有明显改善,铸件质量达到技术指标要求。

A certain small-sized ductile iron hydraulic tee valve castings had sand inclusions and scab defects as they were mass produced, and casting yield was low. These defects were caused by sand washing and iron liquid splashing that occurred when molten metal was poured into gating system. After the improvements of gating system design and the reduction of stack cluster casting height, the improved casting process was simulated utilizing AnyCasting software and then the production verification was carried out. The results show that the filling, slag discharge, material saving and yield of the new scheme are all improved, and the quality of the castings meets the technical requirements.