锻压技术

托板螺母用抽芯铆钉的仿真与实验研究

英文标题：Simulation and experimental research on blind rivets for plate nuts

作者：石智辉王瑞强洪俊杰孙清超

分类号：TG306

出版年,卷(期):页码：2022,47(2):113-118

摘要：

针对托板螺母用抽芯铆钉在铆接后承受载荷能力弱、钉套鼓包容易开裂而影响铆接合格率的问题，利用仿真与实验相结合的方法对抽芯铆钉的力学规律、钉套鼓包破坏情况进行了探索。以100°小沉头托板螺母用抽芯铆钉为研究对象，借助有限元仿真软件DEFORM-3D建立模型，并进行了安装仿真、抗拉仿真与剪切仿真。探索了铆钉结构尺寸对抗拉力的影响规律，得出每种型号的托板螺母用抽芯铆钉存在的最优钉套伸出长度，确定了铆钉抗拉力与钉套内径成反比、与钉杆头部直径成正比，并且利用钉套内径和钉杆头部直径两因素探究了钉套壁厚与钉套鼓包位置最大主应力的关系，预测了钉套可能发生的破坏现象。最后通过对应的实验，验证了有限元仿真模型的合理性。相关研究为提高托板螺母用抽芯铆钉的铆接合格率与研制提供了参考。

Aimed at the problems that the load bearing capacity of blind rivets for plate nuts was weak after riveting, and the bulge of rivet sleeve was prone to cracking, which affected the riveting qualification rate, the mechanical law for the blind rivets and the damage situation for the bulge of rivet sleeve were explored by the method of combining simulation with experiment. For 100° small countersunk head blind rivets for plate nuts, the model for installation simulation, tensile simulation and shear simulation was established by the finite element simulation software DEFORM-3D, and the influence law of rivet structure sizes on tensile resistance force was explored. Then, the optimal extension length of rivet sleeve for each type of blind rivets for plate nuts was obtained, and it was determined that the tensile resistance force of rivet was inversely proportional to the inner diameter of rivet sleeve and directly proportional to the diameter of rivet rod head. Furthermore, the relationship between the wall thickness of rivet sleeve and the maximum principle stress at the bulge position of rivet sleeve was explored by using the inner diameter of rivet sleeve and the diameter of rivet rod head, and the possible failure phenomenon of the rivet sleeve was predicted. Finally, through the corresponding experiments, the rationality of the finite element simulation model was verified. Thus, the related research provides a reference for improving the riveting qualification rate and development of blind rivets for plate nuts.

基金项目：

中央高校基本科研业务费项目（DUT19LAB17）

作者简介：石智辉(1997－)，男，硕士研究生,E-mail：1245638368@qq.com;通信作者：孙清超(1979－)，男，博士，教授,E-mail：qingchao@dlut.edu.cn

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