绞车滚筒铸铁件的铸造工艺设计和数值模拟
Casting Process Design and Numerical Simulation of Winch Roller Castings
陈立林， 米国发， 南红艳， 历长云
点击：3451次 下载：0次
作者单位：（河南理工大学 材料科学与工程学院，河南 焦作 454000）
中文关键字：绞车滚筒； 数值模拟； 凝固过程； 铸造工艺
英文关键字：winch roller; numerical simulation; solidification processing; casting technology
中文摘要：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View Cast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。
英文摘要：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 software. 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.