摘要
通过铆接接头截面组织分析和剪切、剥离以及十字拉伸试验,对JDA1b和HC340/590DP(JDA)、AlSi10MnMg-T7和HC340/590DP(ALSI)两种压铸铝和高强度钢自冲铆接的成形质量、力学性能以及失效形式进行了研究。结果表明:与JDA组铆接接头相比,ALSI组铆接接头的切底量较小、成形质量较差,随着下层板厚度的增加,两组铆接接头成形质量均有所下降。ALSI组铆接接头相较于JDA组铆接接头,力学性能和能量吸收较弱。随着下层板厚度的增加,在剪切工况和剥离工况中,两组铆接接头的峰值载荷以及能量吸收值均随之减小,而在十字拉伸工况中,两组铆接接头的峰值载荷以及能量吸收值均随之增加,其中ALSI组铆接接头的峰值载荷以及能量吸收值变化更为明显。两组铆接接头的失效形式主要为下层板与铆钉分离,仅有JDA组中下层板厚度为2.0 mm的十字拉伸试样出现了上层板断裂现象。
The forming quality,mechanical properties and failure modes of self-piercing riveting for JDAlb and HC340/590DP(JDA),AISi10MnMg-T7 and HC340/590DP(ALSI)die-cast aluminum and high-strength steel were studied by cross-sectional microstructure analysis of riveted joints,and shearing,peeling and cross-tension tests.The results show that compared with the riveted joints of JDA group,the riveted joints of ALSI group have smaller undercut amount and worse forming quality.As the thickness of lower plate increasing,the forming quality of the riveted joints of both groups decreases.Compared with the riveted joints of JDA group,the mechanical properties and energy absorption of the riveted joints of ALSI group were weaker.As the thickness of lower plate increasing,the peak loads and energy absorption values of the riveted joints for two groups decrease in the shearing and peeling conditions,while in the cross-tension condition,the peak loads and energy absorption values of the riveted joints for two groups increase,and the changes in the peak loads and energy absorption values of the riveted joints of ALSI group are more obvious.The failure mode of the riveted joints for two groups is mainly the separation of the lower plate from the rivets,and only the cross-tensile specimen with the thickness of 2.0 mm of lower plate in the JDA group shows the upper plate fracture phenomenon.
作者
李明
尹辉俊
顾成波
Li Ming;Yin Huijun;Gu Chengbo(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China;AISN Innovative Design and Manufacturing Co.,Ltd.,Liuzhou 545001,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2023年第11期87-94,共8页
Forging & Stamping Technology
基金
广西自然科学基金资助项目(2013GXNSFAA019319)
广西科技计划项目(桂科攻1348005-12)。
关键词
钢铝混合
自冲铆接
失效形式
铆接接头
切底量
steel aluminum mix
self-piercing riveting
failure mode
riveted joints
undercut amounts
