锻压技术

自冲铆接铆钉材料流场的数值模拟研究

英文标题：Numerical simulation study on rivet material flow field in self-pierce riveting

作者：陈贵坤曾　凯邢保英何晓聪孙晓婷

单位：昆明理工大学

分类号：TH131. 1

出版年,卷(期):页码：2023,48(1):96-102

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 selfpierce 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.

基金项目：

国家自然科学基金资助项目(51565022, 51565023)

作者简介: 陈贵坤(1995-), 男, 硕士 E-mail: chengk_kust@ 163. com 通信作者: 曾　凯(1976-), 男, 博士, 副教授 E-mail: kmzk201109@ 163. com

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