车用环氧树脂型结构胶施胶厚度对粘接性能的影响研究  

Study on the effect of adhesive layer thickness and performance of epoxy resin-based structural adhesive joints for automotive applications

作　　者：王博 WANG Bo(Shaanxi Institute of Mechatronic Technology,Baoji 721001,Shaanxi China)

机构地区：[1]陕西机电职业技术学院,陕西宝鸡721001

出　　处：《粘接》2023年第11期37-40,共4页Adhesion

摘　　要：通过对汽车用结构胶接头影响因素的研究,对胶接接头胶层厚度与强度进行优化。试验结果表明,在胶层厚度为0.1~1 mm时,接头强度随胶层厚度增加而逐渐下降,且在0.1~0.5 mm时,接头强度与胶层厚度表现出线性关系。对比仅清洗、打磨、喷砂3种表面处理方法,经过喷砂处理的对结构胶的浸润和机械自锁产生积极的影响,因此胶接接头剪切强度较高。在适当的提高固化温度对于增加结构胶的固化效率产生积极的影响,但温度过高会使胶层出现炭化导致接头质量下降。在胶层厚度为0.1 mm,表面处理方式为喷砂,固化温度为180℃,固化时间为30 min时,胶接接头剪切强度最高约为35 MPa。By studying the influencing factors of structural adhesive joints for automobiles,the adhesive layer thickness and strength of the joints were optimized.The experimental results showed that when the thickness of the adhesive layer was between 0.1 and 1 mm,the strength of the adhesive joint gradually decreasedwith the increase of adhesive layer thickness,and when the thickness of the adhesive layer was between 0.1 and 0.5 mm,the strength of the joint showeda linear relationship with the thickness of the adhesive layer.Compared with the three surface treatment methods of cleaning,polishing and sandblasting,the sandblasted surface had a positive impact on the infiltration and mechanical self-lockingof structural adhesive,resulting in a higher shear strength of the glued joints.Increasing the curing temperature within an appropriate range hada positive impact on the curing efficiency of structural adhesives,however,excessive temperature couldcause carbonization of the adhesive layer,leading to a decrease in joint quality.When the adhesive layer thickness was 0.1 mm,the surface treatment method was sand blasting,the curing temperature was 180℃,and the curing time was 30 min,the maximum shear strength of the bonded joint was about 35 MPa.

关 键 词：车用结构胶 胶接接头 剪切强度 影响因素 

分 类 号：TQ437.4[化学工程]