电动自行车电池外壳铝型材挤压模结构优化设计  

Structure optimization design of extrusion die for aluminum profile with rectangular frame

作　　者：杨家栋 黄珍媛[1] 赵亚萌 郑坚 马俊 YANG Jia-dong;HUANG Zhen-yuan;ZHAO Ya-meng;ZHENG Jian;MA Jun(School of Mechanical and Automotive Engineering,South China University of Technolo-gy,Guangzhou,Guangdong 510641,China;Rongyang Aluminum Co.,Ltd.,Guangzhou,Guangdong,511300,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510641 [2]荣阳铝业有限公司,广东广州511300

出　　处：《模具工业》2021年第9期48-53,共6页Die & Mould Industry

摘　　要：针对某电动自行车电池外壳铝型材零件,进行热挤压模结构设计和优化,逐步提高型材出口流速均匀性和减小模具所受应力。基于专用铝型材热挤压成型模拟平台Inspire建立稳态挤压有限元模拟模型,采用流速均方差表征型材出口流速均匀性,通过分析型材流速均匀性和模具最大应力值确定模具结构优化策略。采取取消入料口下沉、增加分流孔、加入导流模3种措施进行优化,获得了最优的模具结构方案。模拟分析和试模料头结果显示,对于矩形框铝型材,增加分流孔个数与加入导流模可以减小模具所受应力,改善型材出口流速。Aiming at the aluminum profile part of an electric bicycle battery shell,the hot extrusion die structure was designed and optimized to gradually improve the flow velocity uniformity at the outlet of the profile and reduce the stress on the die.Based on the special simulation platform Inspire,the steady-state extrusion finite element simulation model was established.The mean square error of flow velocity was used to characterize the flow velocity uniformity at the exit of the profile.The optimization strategy of the die structure was determined by analyzing the flow velocity uniformity of the profile and the maximum stress of the die.Three measures were taken to optimize the die structure,including canceling the sink of water inlet,adding portholes,and adding guide die.The optimal die structure scheme was obtained.The simulation analysis and production test results showed that for rectangular aluminum profile,increasing the number of portholes and adding guide die could significantly reduce the stress on the die and improve the flow velocity at the exit of profile.

关 键 词：电动自行车 矩形框铝型材 挤压模 优化设计 

分 类 号：TG372[金属学及工艺—金属压力加工]