Casting Simulation of Fully Welded Ball Valve Core based on ProCAST

Chao Zuo ； Jia Wang ； Rundong He ； Kehong Li

《International Core Journal of Engineering》 7卷9期 (2021/09) Pp. 45-52

https://doi.org/10.6919/ICJE.202109_7(9).0008

摘要

Based on the commercial casting software ProCAST, the casting process of the fully welded ball valve core was numerically simulated, and two pouring schemes of bottom pouring vertical casting and bottom pouring flat casting were proposed. The simulation results of the two schemes were compared. Analyze and optimize the pouring process for Option 2. The results show that: (1) The maximum impact velocity in the velocity field of the two schemes is 1.14m/s and 1.10m/s respectively, which are both within a reasonable range and will not impact the molding sand; On the whole of the two schemes, the molten metal flows smoothly, without turbulence and entrainment. (2) The filling time of the two schemes is 31.56s and 35.15s respectively. The difference in filling time is mainly related to the difference in the number of model grids and the volume of flow passage. (3) From the defect distribution of the two schemes, it can be seen that the shrinkage defects of scheme 1 are mainly concentrated in the inner flow passage and bottom flow passage, and the quality of the spool casting is better; the shrinkage defects of scheme 2 are mainly concentrated in the lower part of the spool , There are also a small amount of shrinkage defects distributed on the upper part of the valve core and the sprue position. (4) By adding a riser above the valve core, the shrinkage defect inside the valve core was successfully transferred to the riser, and the quality of the valve core casting was improved.

關鍵字

ProCAST ； Numerical Simulation ； Process Optimization

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