由于阀体零件结构复杂,砂型铸造阀体时,浇注系统和工艺参数不当容易导致铸件出现缩松、缩孔等缺陷。采用Pro CAST软件对典型阀体砂型铸造过程进行数值模拟,研究了金属液充型和凝固过程。分析了缺陷产生的原因,改进了浇注工艺方案,提高了铸件的质量和合格率。 Due to the complex structure of the valve body parts, when the sand cast the valve body, improper casting system and process parameters easily lead to casting defects such as shrinkage and shrinkage. The Pro CAST software is used to simulate the typical valve body sand casting process and the filling and solidification of molten metal are studied. The causes of the defects were analyzed, the pouring process was improved and the quality and yield of castings were improved.