基于数值模拟技术的十二缸铝合金曲轴箱的冒口设计  

Riser Design of Aluminum Crankcase of Twelve-Cylinder Engine Based on Numerical Simulation

作　　者：时东娜[1] 李日[1] 宋梦华[1] 李丹[1] 陈林军[1] 王斌[1] 

机构地区：[1]河北工业大学材料科学与工程学院,天津300130

出　　处：《铸造》2008年第9期912-915,共4页Foundry

摘　　要：在分析曲轴箱总体结构的基础上,确定较好的造型方案,用UG造型软件进行了三维造型;在此基础上,利用清华大学研制的数值模拟软件FT-Star对无冒口及浇注系统的铸件进行温度场模拟及缩孔计算,找出全部热节位置。根据铸件中出现的热节位置,确定进行模数计算的结构分体,然后根据这些结构分体,按照铝合金的特点进行冒口设计。利用数值模拟软件对其进行充型凝固的模拟评价,调整冒口及浇注系统进行铸造工艺优化。最后得到了优化的铸造工艺。Based on the analysis of the casting structure, a better modelling method was determined and the 3D model was constructed by means of UG software. Then the FT-Star software, developed by Tsinghua University of China, was employed to simulate the temperature field during solidification of the casting without the gating and feeding system, predict the shrinkage and find out the positions of all the hot spots. According to the positions of those hot spots, the components for moduli calculation were determined. The moduli of these components were decided by analysis function of UG software, and based on the moduli of the components and their distribution in the crankcase the riser system was designed in accordance with the principle of aluminum alloy. The foundry technology was evaluated by the simulation software in order to adjust the chills, the riser and the gating system, etc. In the end, an optimized foundry technology was obtained.

关 键 词：热节 数值模拟 温度场 

分 类 号：TG244.3[金属学及工艺—铸造]