摘要
对铸铁件JH-20型回柱绞车滚筒进行铸造工艺设计。根据铸件形状对称的特点,设计了底注式浇注系统,采用两个内浇道同时对铸件浇注。利用CAD软件建立铸件的三维模型,并用ViewCast铸造模拟软件对铸件的凝固过程进行了数值模拟。模拟显示,在滚筒与法兰连接处会产生缩孔、缩松缺陷。根据数值模拟结果并结合理论分析,对铸造工艺方案进行工艺改进。通过增设冒口的方法,利用冒口对铸件进行补缩,以实现铸件的顺序凝固。结果表明,优化后的工艺有效地消除了缩松缩孔缺陷,从而获得了合理的铸造工艺方案。
The casting process of JH-20 winch roller castings was designed. For the casting＇s symmetrical characteristics of shape and size, bottom gating system and two ingates were defined. The 3-D model of the casting was built by CAD soft-ware. The casting simulation software View Cast was employed to simulate the solidification process of the casting. The initial simulation indicates that the shrinkage defects form at the sections connecting the flange. According to the results of numerical simulation and theory analysis, the casting process is optimized. The defects are effectively eliminated by adding risers. So the reasonable process scheme of the casting is obtained.
出处
《热加工工艺》
CSCD
北大核心
2011年第7期45-47,共3页
Hot Working Technology
关键词
绞车滚筒
数值模拟
凝固过程
铸造工艺
winch roller
numerical simulation
solidification processing
casting technology
