轨道车辆用超宽幅薄壁铝型材挤压过程数值模拟及模具优化  

Numerical simulation of extrusion and die optimization for super wide thin-walled aluminum profile for railway vehicles

作　　者：纵荣荣 郝秋红 韩志君 陈超 赵传业 李俊鹏 

机构地区：[1]山东南山铝业股份有限公司国家铝合金压力加工工程技术研究中心,山东龙口265713 [2]北京南山航空材料研究院,北京100048

出　　处：《塑性工程学报》2015年第4期39-43,66,共6页Journal of Plasticity Engineering

基　　金：科技部国家铝合金压力加工工程技术研究中心重点资助项目(2012FU125Q14)

摘　　要：以轨道车辆用某扁宽、薄壁、弧形的大型铝合金型材为研究对象,基于HyperXtrude专业铝型材挤压成型有限元分析平台,采用拉格朗日-欧拉(ALE)算法,对其稳态挤压成型过程进行数值模拟。结果表明,采用初始模具挤压时,型材出口处的金属流速不均匀。通过增设阻流坎和扩大供料容积,多次优化模具结构后,型材出口处金属流速均匀。数值模拟结果与生产试模结果吻合,数值模拟结果可以为大型复杂截面铝型材挤压模具结构设计和优化提供指导。Based on the professional Finite Element analysis software called HyperXtrude, the steady extrusion process of a large aluminum profile in arc shape with thin-walled and wide-flat characteristics, which is used for railway vehicles, was numerically simulated and analyzed using the arbitrary Lagrangian-Eulerian （ALE） finite element method. The result shows that the metal flow of the profile is not uniform when the profile was extruded through the initial die. The die structure has been optimized for several times by adding blocks and enlarging the feeding volume, and then the metal flow of the profile is balanced. The simulation result fits well with the experimental result which indicates that theoretical guide can be provided for the die structure design and optimization of the profile with large and complex cross-section by numerical simulation.

关 键 词：轨道车辆 挤压型材 数值模拟 模具优化 

分 类 号：TG376[金属学及工艺—金属压力加工]