表面处理对车身用5182铝合金接头胶粘性能的影响  

Effects of Surface Treatment on Bonding Performance of 5182 Aluminum Alloy Used in Vehicle Body Joints

作　　者：陈硕琛 李光耀[1,2] 崔俊佳 Chen Shuochen1,Li Guangyao1,2,Cui Junjia1,2(1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Changsha 410082, 2. Collaborative Innovation Center of Intelligent New Energy Vehicle , Shanghai 20180)

机构地区：[1]汽车车身先进设计制造国家重点实验室,长沙410082 [2]智能型新能源汽车协同创新中心,上海201804

出　　处：《汽车工程》2018年第7期865-870,共6页Automotive Engineering

基　　金：国家自然科学基金重点项目(61232014);国家自然科学基金(51405149)资助

摘　　要：本文中采用胶接技术实现了车身用5182铝合金板件的连接,利用不同表面处理改变了板件的表面质量,研究了表面粗糙度、微观表面积等参数对接头界面形貌和力学性能的影响。采用表面自由能测量、拉伸剪切试验和光学显微镜测量等测试分析方法,对不同试验样件润湿性、力学性能和断裂面特征进行了分析。结果表明,使用砂纸打磨可增加铝合金板件的表面粗糙度和粘接面积,加强胶层与板件的机械咬合,提高接头强度。其中,360目砂纸打磨板件对接头强度提升最大,过高或者过低的粗糙度都会降低胶层与板件的有效接触面积,不利于增强胶接接头强度。In this paper,adhesive bond technique is employed to achieve the bonding of 5182 aluminum alloy used in vehicle body,different surface treatments are adopted to change the surface quality of panel,and the effects of surface parameters such as surface roughness and microscopic surface area on the morphology of joint interface and mechanical properties are studied. The wettability,mechanical properties and the features of fracture surface are analyzed by means of surface free energy measurement,tension/sheer tests and optical microscope measurement. The results show that emery cloth scraping can increase the surface roughness and bonding area of aluminum alloy panels,strengthen the mechanical seizing effects between adhesive and panel,and enhance joint bonding strength. Among them,scraping by P360 can get a greatest enhancement in joint bonding strength,and higher or lower roughness will cause a reduction in effective contact area between adhesive and panel,leading to the lowering of the bonding strength of joints.

关 键 词：汽车轻量化 胶接 铝合金 表面自由能 

分 类 号：U463.82[机械工程—车辆工程]