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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。
According to the structural features of the bearing shell cast iron, casting process design of the bearing shell. Casting system designed on the side of the casting, the top of the casting design riser to achieve the shell to make up. The 3D model of castings was established with CAD software. The simulation of the solidification process of the bush body was carried out by using ViewCast simulation software. It was found that shrinkage porosity and other defects were found on the top and hot joints of the castings. According to the numerical simulation results and the theoretical analysis, the casting process scheme is improved by using the thermal riser. The results show that only a small amount of shrinkage in the hot section, casting defects have disappeared.