车用发动机大型气缸盖浇注工艺的优化设计

研究了车用发动机大型六缸气缸盖复杂薄壁铸铁件采用湿型粘土砂型铸造工艺,应用传统底注式进气侧浇注系统、中注式排气侧浇注系统,铸件出现严重的气孔、浇不足、冷隔等问题。结果表明,采用顶注式浇注系统,铸件合格率高、工艺出品率高,具有良好的技术经济效果,能降低浇注温度、铸件表面质量良好。

Optimum Design of Pouring Process for Large Cylinder Head of Automotive Engine

The casting process of complex thin-walled cast iron with wet clay sand mold for large six-cylinder head of automotive engine was studied. Serious defects such as blowhole, underpouring and cold isolation occurred in the castings by using the traditional bottom-pouring pouring system on the inlet side and the middle-pouring pouring system on the exhaust side. The results show that the top pouring system has high qualified rate, high production rate and good technical and economic effect, lower casting temperature and better surface quality.