轴瓦体铸铁件的数值模拟和铸造工艺优化

Numerical Simulation of Cast iron Bearing Body and Its Casting Process Optimization

根据轴瓦体铸铁件的结构特点,对轴瓦体进行铸造工艺设计。在铸件一侧设计浇注系统,在铸件顶部设计了冒口来实现对壳体进行补缩。用CAD软件建立了铸件的三维模型,运用ViewCast模拟软件对轴瓦体进行凝固过程模拟,发现在铸件顶部及热节处存在缩孔缩松等缺陷。根据数值模拟结果并结合理论分析,通过改用保温冒口的方法改进了铸造工艺方案。结果表明,只在热节处出现少量的缩松,铸件的缺陷已经消失。

The casting process of cast iron bearing body was designed according to the structrue characteristics of the castings.The gating system was placed at the side of the casting,the two risers were placed at the top of the casting in order to add feedidng.The three-dimensional model of the casting was built by CAD software.The casting simulation software View Cast was employed to simulate the solidification process of the casting.The initial simulation indicated the shrinkage defects formed at the top of the casting and the hot spots.According to the results of numerical simulation and analysis,the casting process was optimized.The insulated risers were designed to feed the casting.The results show that the shrinkage defects reduce effectively and only a few of shrinkage appeares in hot spots.The defects are basically eliminated.