大直径钢铆钉电磁铆接工艺及性能试验研究  

Study on Electromagnetic Riveting and Tensile Performances of Large Diameter Steel Rivet

作　　者：廖宇轩 蒋浩[1] 金长城 李光耀[1,2] 崔俊佳 LIAO Yuxuan;JIANG Hao;JIN Changcheng;LI Guangyao;CUI Junjia(State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle,Hunan University,Changsha 410082,China;Shenzhen Automotive Research Institute(Shenzhen Research Institute of National Engineering Laboratory for Electric Vehicles),Beijing Institute of Technology,Shenzhen 518118,China)

机构地区：[1]湖南大学整车先进设计制造技术全国重点实验室,长沙410082 [2]北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院),深圳518118

出　　处：《航空制造技术》2023年第23期60-65,共6页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(52005173);湖南省自然科学基金(2021JJ40073);深圳市科技计划(KQTD20200820113110016)。

摘　　要：电磁铆接技术可以有效地使大直径铆钉一次成形,快速生产高质量铆接接头,在航空航天工业中有广阔的应用场景,但目前针对大直径钢铆钉电磁铆接接头的相关研究较少。本文通过搭建大直径铆钉电磁铆接平台,对直径10 mm的钢铆钉进行工艺试验。试验结果表明,铆接后的镦头直径均随着放电能量增大而增大,镦头高度均随着放电能量增大而减小。在相同放电能量下,预制孔直径越大,镦头高度越低且直径越大。此外,大直径钢铆钉电磁铆接接头的干涉量随着放电能量的增大逐渐增大。预制孔直径10.1 mm铆接接头的干涉量始终要大于预制孔直径10.3 mm铆接接头。与此同时,由于预制孔直径为10.3 mm铆接接头在铆接过程中容易歪斜,此值不宜作为优选工艺参数。另外,综合放电能量区间参数,得到了大直径钢铆钉电磁铆接最佳工艺参数:预制孔直径10.1 mm、放电能量15.5 kJ。最后,对大直径铆钉电磁铆接接头及传统液压铆接接头的干涉量和机械性能进行了对比。结果表明,对于最佳工艺参数制备的大直径钢铆钉电磁铆接接头,其干涉量为2.15%,较液压铆接接头的干涉量1.75%数值更大,也更均匀,其最大剪切载荷及吸能值高于液压铆接接头。Electromagnetic riveting(EMR)technology can effectively form large-diameter rivets in a single process and quickly produce high-quality joints.It has broad application scenarios in the aerospace industry,but there are few studies related to EMR joints for large-diameter steel rivets.In this paper,an EMR platform for large diameter rivets was built,and the riveting process test was carried out for 10 mm diameter steel rivets.The results show that the header diameter increased with increasing discharge energy and the header height decreased with increasing discharge energy.At the same discharge energy,the larger the preformed hole diameter,the smaller the header height and the larger the header diameter.In addition,the interferencefit size of riveted joints gradually increased with the increase of discharge energy for both prefabricated hole diameters.The interferencefit size of riveted joint with the prefabricated hole diameter 10.1 mm was always greater than that with 10.3 mm.At the same time,the value(10.3 mm)was not suitable as the preferred process parameter because the riveted joint with the prefabricated hole diameter 10.3 mm tended to be skewed during the riveting process.In addition,the optimal process parameters were obtained by combining the discharge energy:the prefabricated hole diameter of 10.1 mm and the discharge energy of 15.5 kJ.Finally,the interferencefit size and mechanical properties of the EMR joints were compared with those of the conventional hydraulic riveted joints.The results indicated that the interferencefit size(2.15%)of the EMR joint prepared according to the optimal process parameters was larger and more uniform than that of the hydraulic riveted joint(1.75%).The maximum shear load and energy absorption values were slightly higher than those of the hydraulic riveted joint.

关 键 词：大直径钢铆钉 电磁铆接 工艺试验 力学性能 干涉量 

分 类 号：V261.29[航空宇航科学与技术—航空宇航制造工程] V46[金属学及工艺—钳工工艺] TG938