摘要
以厚度为2 mm的同种AA5052铝合金板料为铆接对象,利用Simufact Forming16.0软件建立铝合金自冲铆接的仿真模型。设定不同水平的铆钉内腔高度和铆钉高度,分别进行模型非线性有限元计算。分析了不同铆钉工艺参数下铆钉材料流场变化以及对接头成形质量和铆接最大冲压载荷的影响。试验表明:仿真结果与实际的接头截面成形效果相似,接头主要变形区域内的板料流速较大;较小内腔高度的铆钉形成的接头内锁结构更优,残余底厚为0.784 mm、钉脚张开度为1.058 mm,铆钉材料径向流速更快;钉脚张开度、铆钉材料径向流速和铆接的最大冲压载荷均随着铆钉高度的增加而增大,残余底厚随着铆钉高度的增加而减小。
For riveting of the same AA5052 aluminum alloy sheet with thickness of 2 mm, the simulation model of aluminum alloy self-pierce riveting(SPR) was established by finite element software Simufact Forming 16.0. Then, the rivet cavity height and rivet height at different levels were set, and the model nonlinear finite element calculations were conducted respectively. Furthermore, the change of rivet material flow field under different rivet process parameters and its influences on the joint forming quality and the maximum stamping load of riveting were analyzed. The tests show that the forming effects of simulation and actual joint sections are similar, and the flow velocity of sheet metal in the main deformation area of joint is relatively high. The smaller cavity height of rivet creates a better internal locking structure in the joint with a remaining bottom thickness of 0.784 mm and a rivet spread of 1.058 mm, as well as a faster radial flow velocity of rivet material. The rivet spread, the radial flow velocity of rivet materials and the maximum stamping load of riveting all increase with the increasing of the rivet height, and the remaining bottom thickness decreases with the increasing of the rivet height.
作者
陈贵坤
曾凯
邢保英
何晓聪
孙晓婷
Chen Guikun;Zeng Kai;Xing Baoying;He Xiaocong;Sun Xiaoting(Yunnan Key Laboratory of Advanced Equipment and Intelligent Manufacturing Technology,Kunming University of Science and Technology,Kunming 650500,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2023年第1期96-102,共7页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(51565022,51565023)。
关键词
自冲铆接
铝合金
材料流动
内腔高度
铆钉高度
self-piercing riveting
aluminum alloy
material flow
cavity height
rivet height