铝锂合金压印-点焊复合连接接头力学性能分析
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摘要
分别采用压印连接和压印-点焊复合连接方式对铝锂合金AL1420进行连接,通过对拉伸-剪切试验后失效接头和得到的载荷-位移曲线进行观察和分析,对各组试件进行失效形式和力学性能的对比研究,并对不同焊接电流对接头产生的影响进行探讨。结果表明:焊接电流能有效改变压印接头性能。压印-点焊复合连接较压印连接接头断口处截面变形严重,但接头力学性能优于压印连接接头性能,并且焊接电流每增大1 k A,接头承载力以1. 05倍速率增加;压印-点焊复合连接接头较压印连接接头具有更好的能量吸收特性,并且随焊接电流的增大,能量吸收性能提高。
The aluminum-lithium alloy AL1420 was connected by the way of clinching and clinching-spot welding composite connection respectively,by observing the failure of joint and analyzing load-displacement curves after the tensile-shear test of the specimen,the failure mode and mechanical properties of each specimen were compared and studied,and the effects of different welding currents on the joint were discussed. The results show that the welding current can effectively change the performance of the clinched joint. Compared with the joint connected by clinching,the joint connected by clinching-spot welding composite connection is more serious deformed at the fracture and has better mechanical properties. The carrying capacity of the joint increases by 1. 05 times for each 1 k A increment of welding current. The clinching-spot welding composite connection joint has better energy absorption property than the clinched joint,and the energy absorption property is improved with the increase of welding current.
The aluminum-lithium alloy AL1420 was connected by the way of clinching and clinching-spot welding composite connection respectively,by observing the failure of joint and analyzing load-displacement curves after the tensile-shear test of the specimen,the failure mode and mechanical properties of each specimen were compared and studied,and the effects of different welding currents on the joint were discussed. The results show that the welding current can effectively change the performance of the clinched joint. Compared with the joint connected by clinching,the joint connected by clinching-spot welding composite connection is more serious deformed at the fracture and has better mechanical properties. The carrying capacity of the joint increases by 1. 05 times for each 1 k A increment of welding current. The clinching-spot welding composite connection joint has better energy absorption property than the clinched joint,and the energy absorption property is improved with the increase of welding current.
引文
[1]HE X C,XING B Y,ZENG K,et al.Numerical and experimental investigations of self-piercing riveting[J].International Journal of Advanced Manufacturing Technology,2013,69(1-4):715-721.
[2]HE X C.Clinching for sheet materials[J].Science&Technology of Advanced Materials,2017,18(1):381-405.
[3]PAULA A A D,AGUILAR M T P,PERTENCE A E M,et al.Finite element simulations of the clinch joining of metallic sheets[J].Journal of Materials Processing Tech.,2007,182(1):352-357.
[4]LAMBIASE F,ILIO A D.Finite element analysis of material flow in mechanical clinching with extensible dies[J].Journal of Materials Engineering&Performance,2013,22(6):1629-1636.
[5]ESHTEYAH M,HRAIRI M,DAWOOD M S,et al.Finite element modeling of clinching process for joining dissimilar materials[J].Advanced Materials Research,2015,1115:109-112.
[6]邢保英,何晓聪,冯模盛,等.粘接剂对压印连接强度的影响及数理统计分析[J].材料导报,2012,26(2):56-59.XING Baoying,HE Xiaocong,FENG Mosheng,et al.Analysis on influence of adhesive on strength of clinched joints with msthematical statistics[J].Materials Review,2012,26(2):56-59.
[7]初明明,何晓聪,雷蕾,等.泡沫金属夹层对压印-粘接复合接头力学性能的影响[J].塑性工程学报,2018,25(3):248-253.CHU Mingming,HE Xiaocong,LEI Lei,et al.Effect of foam metal sandwich on mechanical properties of clinch-bonded hybrid joint[J].Journal of Plastic Engineering,2018,25(3):248-253.
[8]韩晓兰,赵升吨,陈超,等.轻质板材平底无铆连接成形模具的优化[J].锻压技术,2017,42(1):92-97.HAN Xiaolan,ZHAO Shengdun,CHEN Chao,et al.Optimization on flat-connecting die without rivet for lightweight material[J].Forging&Stamping Technology,2017,42(1):92-97.
[9]陈超,赵升吨,崔敏超,等.铆压重塑形工艺的铆钉优化与试验研究[J].西安交通大学学报,2016,50(3):94-100.CHEN Chao,ZHAO Shengdun,CUI Minchao,et al.Rivet optimization and experimental research on the reshapeing method[J].Journal of Xi'an Jiaotong University,2016,50(3):94-100.
[10]张杰,何晓聪,冯煜阳,等.铝合金板材不同连接工艺接头强度对比研究[J].兵器材料科学与工程,2018,41(4):19-22.ZHANG Jie,HE Xiaocong,FENG Yuyang,et al.Joint strength comparison of aluminium alloy sheets with different joining process[J].Ordnance Material Science and Engineering,2018,41(4):19-22.
[2]HE X C.Clinching for sheet materials[J].Science&Technology of Advanced Materials,2017,18(1):381-405.
[3]PAULA A A D,AGUILAR M T P,PERTENCE A E M,et al.Finite element simulations of the clinch joining of metallic sheets[J].Journal of Materials Processing Tech.,2007,182(1):352-357.
[4]LAMBIASE F,ILIO A D.Finite element analysis of material flow in mechanical clinching with extensible dies[J].Journal of Materials Engineering&Performance,2013,22(6):1629-1636.
[5]ESHTEYAH M,HRAIRI M,DAWOOD M S,et al.Finite element modeling of clinching process for joining dissimilar materials[J].Advanced Materials Research,2015,1115:109-112.
[6]邢保英,何晓聪,冯模盛,等.粘接剂对压印连接强度的影响及数理统计分析[J].材料导报,2012,26(2):56-59.XING Baoying,HE Xiaocong,FENG Mosheng,et al.Analysis on influence of adhesive on strength of clinched joints with msthematical statistics[J].Materials Review,2012,26(2):56-59.
[7]初明明,何晓聪,雷蕾,等.泡沫金属夹层对压印-粘接复合接头力学性能的影响[J].塑性工程学报,2018,25(3):248-253.CHU Mingming,HE Xiaocong,LEI Lei,et al.Effect of foam metal sandwich on mechanical properties of clinch-bonded hybrid joint[J].Journal of Plastic Engineering,2018,25(3):248-253.
[8]韩晓兰,赵升吨,陈超,等.轻质板材平底无铆连接成形模具的优化[J].锻压技术,2017,42(1):92-97.HAN Xiaolan,ZHAO Shengdun,CHEN Chao,et al.Optimization on flat-connecting die without rivet for lightweight material[J].Forging&Stamping Technology,2017,42(1):92-97.
[9]陈超,赵升吨,崔敏超,等.铆压重塑形工艺的铆钉优化与试验研究[J].西安交通大学学报,2016,50(3):94-100.CHEN Chao,ZHAO Shengdun,CUI Minchao,et al.Rivet optimization and experimental research on the reshapeing method[J].Journal of Xi'an Jiaotong University,2016,50(3):94-100.
[10]张杰,何晓聪,冯煜阳,等.铝合金板材不同连接工艺接头强度对比研究[J].兵器材料科学与工程,2018,41(4):19-22.ZHANG Jie,HE Xiaocong,FENG Yuyang,et al.Joint strength comparison of aluminium alloy sheets with different joining process[J].Ordnance Material Science and Engineering,2018,41(4):19-22.