防撞梁用空心铝型材挤压模设计及结构改进  

Design and structural improvement of extrusion die for hollow aluminum profiles used in anti-collision beams

作　　者：徐晨 陈文琳[1] 周晓远 阮祥明 吉宏选 XU Chen;CHEN Wen-lin;ZHOU Xiao-yuan;RUAN Xiang-ming;JI Hong-xuan(School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009, China;Anhui Shengxin Aluminium Corporation Limited, Xuancheng, Anhui 242000, China)

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]安徽生信铝业股份有限公司,安徽宣城242000

出　　处：《模具工业》2019年第2期60-65,共6页Die & Mould Industry

基　　金：安徽省2018重点研究与开发计划项目(1804a09020073)

摘　　要：以防撞梁空心铝型材为研究对象,根据相关设计标准设计挤压模,利用数值模拟技术获得连续挤压过程中金属流动速度分布情况以及型材截面新旧坯料的变化过程,计算型材横向焊缝的长度,根据模拟结果,针对金属流动速度的不合理性,对分流桥、焊合室以及工作带等结构进行改进。改进后,型材出口处金属流速均匀,横向焊缝长度降低,试模试验与数值模拟结果吻合,为模具结构的设计和改进提供了指导。Taking the hollow aluminum profile used in anti-collision beam as the research object, the extrusion die was designed according to the relevant standards. The numerical simulation technology was used to obtain the distribution of metal flow velocity during the continuous extrusion process and the changing process of the new and old blanks in cross section, and the transverse seam length of the profile was calculated. According to the simulation results, the structures of the porthole bridge, the welding chamber and the die land were improved in view of the irrationality of the metal flow velocity. After the improvement, the metal flow velocity at the exit was uniform, and the length of transverse seam line was reduced. The trial test was consistent with the numerical simulation results,which provided guidance for the design and improvement of the die structure.

关 键 词：空心铝型材 模具设计 数值模拟 横向焊缝 挤压力 

分 类 号：TG376[金属学及工艺—金属压力加工]