介绍了湿型砂生产减速器壳体的铸造工艺设计,利用华铸CAE对初始工艺方案浇冒系统进行充型及凝固的模拟,发现差速锁热节位置存在缩松缺陷。根据缺陷形成原因的分析,对铸造工艺进行了优化。并经生产验证,优化后的铸造工艺能保证铸件内部致密,产品满足客户要求。 The design of the casting process for the shell of reducer with wet sand was introduced. The simulation of the filling and solidification of the initial process scheme was carried out by using HuaCao CAE. It was found that there was shrinkage defect in the position of differential lock hot section. Based on the analysis of the causes of defects, the casting process was optimized. And verified by the production, the optimized casting process can ensure the internal compactness of castings and the products meet the requirements of customers.