MAGMA在发动机缸体砂型铸造气孔缺陷预测中的应用

The Application of MAGMA on Predication and Defect of Gas Holes in Sand Casting Process of Cylinder Block

缸体是整个发动机生产中的难点和重点,其铸造工艺水平是决定发动机质量的基础条件。本文应用铸造模拟软件MAGMA,通过分析砂型铸造缸体充型过程中的温度场分布、气体压力分布、裹气缺陷的分布,预测了两种不同浇注时间下,缸体气孔分布及严重程度,并得到实际验证。从而为实际生产中气孔缺陷原因的分析及工艺改进提供参考。

The cylinder block is the most important in the engine but also difficult part to ma- chine. The level of casting process used for the cylinder block is a basic condition for engine quali- ty. Using the casting simulation software, the paper analyzes the distribution like temperature field, air pressure and air entrap and gives a prediction on the distribution as well as degree of gas holes on cylinder block at two different pouring times, moreover, the result is validated, which provides ref- erences to analyze the reasons of gas holes defect and to improve the casting process.