2024铝合金自冲铆成形工艺参数对接头微动滑移的影响  

Influence of process parameters of 2024 aluminum alloy self-piercing riveting on fretting slip of joint

作　　者：游仁正 窦炜 张洪申[1] 邢保英[1] 曾凯[1] YOU Ren-zheng;DOU Wei;ZHANG Hong-shen;XING Bao-ying;ZENG Kai(College of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China;College of Mechanical and Electrical Engineering,Kunming University,Kunming 650214,China)

机构地区：[1]昆明理工大学机电工程学院,云南昆明650500 [2]昆明学院机电工程学院,云南昆明650214

出　　处：《塑性工程学报》2024年第11期105-111,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52065034)。

摘　　要：以冲压速度和铆钉硬度为影响因子,基于数值模拟与静力学试验,探究了低延展性材料2024铝合金自冲铆接头机械内锁区在受载工况下的微动滑移、几何特征尺寸的变化规律。结合静力学试验设备和数字图像采集系统,对自冲铆接头机械内锁区域滑移过程实时图像进行了采集和分析。结果表明,冲压速度和铆钉硬度对接头的微动滑移有显著影响。随着冲压速度的增加,铆钉扩张直径逐渐增加,而受载工况下接头微动滑移量逐渐减小;随着铆钉硬度的增加,微动滑移量逐渐增大,而铆钉扩张直径依次减小。数值模拟与试验结果的变化规律一致,据此得出微动滑移量与铆钉扩张直径呈一定反比关系。Taking stamping speed and rivet hardness as the influence factors,based on numerical simulation and static tests,the variation laws of fretting slip and geometric characteristics size of the mechanical inner locking area of the self-piercing riveting joint of low ductility material 2024 aluminum alloy under load condition was investigated.Combining with statics test equipment and digital image acquisition system,the real-time image of the sliding process of the mechanical inner locking area of the self-piercing riveting joint was collected and analyzed.The results show that the stamping speed and rivet hardness have significant influence on the fretting slip of the joint.With the increase of stamping speed,the expansion diameter of rivet gradually increases,while the fretting slip of the joint decreases gradually under load condition.With the increase of rivet hardness,the fretting slip increases gradually,and the expansion diameter of rivet decreases successively.The numerical simulation is consistent with the test results,and it is concluded that there is a certain inverse relationship between the fretting slip and expansion diameter of rivet.

关 键 词：微动滑移 静力学试验 2024铝合金 铆钉扩张直径 数字图像采集系统 

分 类 号：TG938[金属学及工艺—钳工工艺]