5056铝合金桥形零件挤压成形研究  

Extrusion forming of 5056 aluminum alloy bridge shaped part

作　　者：贾康凯 张宝红[1] 李国俊[1] 骆无思 陈艳[2] JIA Kangkai ZHANG Baohong LI Guojun LUO Wusi CHEN Yan(School of Materials Science and Engineering, North University of China, Taiyuan 030051, China Mechanical Engineering Department, Hunan Chemical Vocational Technology Institute, Zhuzhou 412004, China)

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]湖南化工职业技术学院机械工程系,湖南株洲412004

出　　处：《兵器材料科学与工程》2017年第2期72-76,共5页Ordnance Material Science and Engineering

基　　金：国防基础科研项目(JSJC2013204B403)

摘　　要：为得到综合性能良好的5056铝合金桥形件,采用挤压成形工艺方案并对在不同小圆角半径的凸凹模作用下桥形件的成形过程进行数值模拟和分析。结果表明:当压下量S为40 mm、成形温度为420℃、凸凹模小圆角半径r为10 mm时,挤压变形过程中桥形件的小圆角处不会出现缩口缺陷;桥形件的等效应变分布、等效应力分布较为均匀;桥形件的等效应变差值最小,等效应力最大值最低。采用优化后的工艺参数和模具对模拟结果进行实验验证,得到符合尺寸和精度要求的桥形件。In order to obtain the bridge shaped part of 5056 aluminum alloy with good comprehensive properties,the extrusion forming process was adopted and the numerical simulation was carried out to analyze the forming process under the action of punch and die with different small fillet radius. The results show that,when the reduction S is 40 mm,the forming temperature is420 ℃ and the small fillet radius of punch and die is 10 mm,the necking defects will not appear in small corner of the bridge shaped part in the extrusion deformation process,equivalent strain and equivalent stress are more evenly distributed;difference of equivalent strain is the smallest and maximum value of equivalent stress is the lowest. The simulation results were verified by experiments adopting the optimized process parameters and die. The bridge shaped parts that meet the requirements of dimensions and performance were obtained.

关 键 词：5056铝合金 桥形件 挤压成形 缩口 数值模拟 

分 类 号：TG76[金属学及工艺—刀具与模具]