定位夹具对CNTs/6061Al复合材料超声波焊接接头质量影响研究  

Study on the Influence of Positioning Fixtures on the Quality of Ultrasonic Welded Joints of CNTs/6061Al Composites

作　　者：熊志林 谭范文 陈湘 XIONG Zhilin;TAN Fanwen;CHEN Xiang(Hunan Engineering Technology Research Center of Digitalization of CNC Machining Process for Precision Parts,Changsha 410208,Hunan;School of Mechanical Engineering,Hunan Industry Polytechnic,Changsha 410208,Hunan;Hunan Engineering Research Center of Equipment Quality Characteristic Testing and Evaluation Technology,Changsha 410208,Hunan)

机构地区：[1]湖南省精密零件数控加工工艺数字化工程技术研究中心,湖南长沙410208 [2]湖南工业职业技术学院机械工程学院,湖南长沙410208 [3]装备质量特性检测与评估技术湖南省工程研究中心,湖南长沙410208

出　　处：《湖南工业职业技术学院学报》2024年第2期1-5,共5页Journal of Hunan Industry Polytechnic

基　　金：2021年度湖南省教育厅科学研究项目“超声波焊接制备CNTs增强铝基复合材料界面调控及强化机理研究”(项目编号:21C1072)。

摘　　要：采用超声波焊接制备CNTs增强铝基复合材料,针对超声波焊接定位不准,接头搭接面不贴合等问题,基于定位夹具以保证焊接过程质量,在工艺参数组合焊接能量500J,焊接压力0.45MPa,焊接振幅35μm下进行焊接试验。利用扫描电镜(SEM)、能谱仪(EDS)等对接头界面组织和成分进行了研究,并对焊接接头进行了剪切力和硬度测试。结果表明:在定位夹具下焊接的接头界面发生明显塑性且CNTs在铝基体扩散较好,接头强度显著提升,剪切力平均值达到786.55N、硬度为72HV,本研究对现有的有色金属超声波焊接制造工艺提出一种新的解决思路和方案,具有一定的工程应用价值和经济效益。CNTs reinforced aluminum matrix composites were prepared by ultrasonic welding.In view of the inaccurate positioning of ultrasonic welding and the non-fit of the joint lap surface,the welding test was conducted based on the positioning fixture to ensure the quality of the welding process,and the welding energy was 500J,the welding pressure was 0.45 MPa,and the welding amplitude was 35μm.The interfacial structure and composition of the welded joint were studied by means of scanning electron microscopy(SEM)and energy dispersive spectrometer(EDS),and the shear force and hardness of the welded joint were tested.The results show that obvious plasticity occurs at the interface of the joint welded under the positioning fixture,CNTs are well diffused in the aluminum matrix,and the strength of the joint is significantly improved,with the average shear force reaching 786.55 N and the hardness 72 HV.The research results provide a new solution idea and scheme for the existing non-ferrous metal ultrasonic welding manufacturing process,which has certain engineering application value and economic benefits.

关 键 词：超声波焊接 定位夹具 碳纳米管 铝基复合材料 接头强度 

分 类 号：TG453.9[金属学及工艺—焊接]