汽车副车架挤压铸造凝固过程热-力耦合模拟  

A Coupled Thermo-mechanical Simulation of Squeeze Casting Solidification Process of Subframe for Automobile

作　　者：汤杰[1] 王非凡[1] 韩志强[1] 孙珏 许善新 

机构地区：[1]清华大学材料学院先进成形制造教育部重点实验室 [2]苏州三基铸造装备股份有限公司

出　　处：《特种铸造及有色合金》2015年第1期52-56,共5页Special Casting & Nonferrous Alloys

基　　金：清华大学汽车工程系;汽车安全与节能国家重点实验室;清华大学苏州汽车研究院资助项目(2013XC-A-01);国家自然科学基金资助项目(51175291)

摘　　要：根据挤压铸造凝固过程的基本物理规律和特点,提出了一种基于ANSYS的挤压铸造凝固过程热-力耦合模拟方法。模拟中考虑了热收缩和相变收缩,材料凝固和受力状态下的力学行为、潜热释放规律,以及界面传热与变形之间的相互作用。通过对阶梯试样的模拟,展示了模拟方法的有效性,模拟结果在一定程度上描述了铸件凝固过程的温度变化,同时较好地显示了挤压铸造凝固过程中挤压力的传递和衰减。最后,利用此模拟方法对汽车副车架的挤压铸造凝固过程进行计算,并根据模拟结果对工艺方案进行了优化。A coupled thermo-mechanical simulation of three-dimensional squeeze casting components has been conducted by using ANSYS software according to the basic principle and characteristics of the squeezing casting.Some factors influencing simulation were taken into account,such as effect of volume shrinkage due to cooling and solidification,the mechanical behavior of materials under evaluated temperatures,the characteristics of latent heat release,and the mutual dependence of interfacial heat transfer and casting deformation in the simulation.A step-shaped trial-part was simulated,which demonstrated the ability of the method to simulate the pressure transmit and fading inside the castings.Finally,the method was applied to simulate the solidification of an automotive subframe component,and the squeeze casting process of the component was optimized based on the simulated results.

关 键 词：挤压铸造 热-力耦合模拟 汽车副车架 

分 类 号：TG21[金属学及工艺—铸造] U466[机械工程—车辆工程]