锻压技术

铝合金半空心铆钉压铆力及铆接强度

英文标题：Riveting force and riveting strength for aluminum alloy semi-hollow rivets

作者：李宗刚1 2 梁涛1 2 焦建军1 2

分类号：TP301

出版年,卷(期):页码：2024,49(11):77-86

摘要：

以Φ2 mm×10 mm规格的半空心铆钉为对象，分析其压铆力值，实现自动化铆接。通过轴对称旋转薄壳理论和塑性理论，得到了压铆过程的几何参数及半空心铆钉的压铆力阈值公式。采用有限元法，分析了铆接过程中铆钉的应力和形状变化，将过程划分为5个阶段，并得出了直径为Φ2、Φ4和Φ6 mm铆钉的压铆力仿真值。利用机器人铆接系统进行了实验，测量了不同规格铆钉的压铆力，并将结果与仿真及理论计算结果进行对比，发现误差均小于5%。最后，利用有限元软件分析了压铆后连接件的拉伸强度，结果显示，直径为Φ2、Φ4和Φ6 mm铆钉的拉伸剪切力分别为40、100和150 N，表明连接件强度高且铆接质量良好。

For Φ2 mm×10 mm semi-hollow rivets, the riveting force values were analyzed, and the automated riveting was achieved. Then, the geometric parameters of the riveting process and the threshold formula for the riveting force of semi-hollow rivets were derived by the theory of axisymmetric rotating thin shells and the plasticity theory, and the stress and shape changes of rivets during the riveting process were analyzed by finite element method (FEM). Furthermore, the riveting process was divided into five stages, and the riveting force simulation values for rivets with the diameters of Φ2,Φ4 and Φ6 mm were obtained. Finally, the experiments were conducted by the robotic riveting system to measure the riveting forces of rivets with different specifications, the results were compared with the simulation and theoretical calculation results. And it is found that the errors are all less than 5%. The tensile strength of the connected components were analyzed by finite element software after riveting,and the results show that the tensile-shear forces for rivets with the diameters of Φ2,Φ4 and Φ6 mm are 40, 100 and 150 N, respectively, indicating the high strength of the connected components and the good quality of riveting.

基金项目：

国家自然科学基金资助项目(61663020)；甘肃省教育厅项目(2022CYZC-33)；国家重点实验室开放基金项目(GZ22119)

作者简介：李宗刚（1975-），男，博士，教授 E-mail：lizongg@126.com

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