座舱透明件边缘连接用环氧胶膜的粘接工艺研究  

Research on bonding process of epoxy adhesive film for edge connection of cockpit transparent parts

作　　者：李言 Li Yan(AVIC Manufacturing Technology Institute,Beijing 100024,China)

机构地区：[1]中国航空制造技术研究院,北京100024

出　　处：《中国胶粘剂》2024年第5期51-56,共6页China Adhesives

摘　　要：采用非等温差示扫描量热法研究了J-351环氧胶膜的固化行为,利用T-β外推法计算出J-351环氧胶膜的理论固化温度范围。进而对座舱透明件边缘连接用环氧胶膜使用过程中关于固化温度、表面处理、加压方式等方面的性能参数进行试验论证,得出最佳粘接工艺。通过典型结构样件的疲劳试验,验证工艺可行性,为大尺寸座舱透明件进行边缘粘接提供关键工艺参数。研究结果表明:(1)J-351环氧胶膜的固化反应为单一放热峰。根据T-β外推法可知,J-351环氧胶膜的理论反应温度范围为70.92~127.21℃。(2)当固化温度为85℃、固化时间为6 h时,胶膜的剪切强度可达到座舱透明件边缘连接的使用要求。增加预固化步骤可有效改善胶膜与有机玻璃或涤丝带之间的浸润性。(3)采用320目砂纸打磨和真空加压的方式效果最好。(4)相对最优化工艺条件为:有机玻璃表面采用320目砂纸打磨,70℃下预固化1 h,85℃下固化6 h,真空袋加压,压力为0.1 MPa。所制得边缘连接粘接件的剪切强度约为234 kN/m,典型结构件的疲劳循环次数可达150000次,疲劳极限载荷可达到8.352 kN,可满足座舱透明件边缘连接的使用要求。The curing behavior of J-351 epoxy adhesive film was studied by using non isothermal differential scanning calorimetry method,and the theoretical curing temperature range of J-351 epoxy adhesive film was calculated by using T-β extrapolation method.Furthermore,experimental verification was conducted on the performance parameters related to curing temperature,surface treatment,and pressure method during the use of epoxy adhesive film for edge connection of cockpit transparent parts,and the optimal bonding process was determined.By conducting fatigue tests on typical structural components,the feasibility of the process was verified,which provided key process parameters for edge bonding of large-sized cockpit transparent parts.The research results showed that,(1)The curing reaction of J-351 epoxy adhesive film was a single exothermic peak.According to T-β extrapolation method,it showed that the theoretical reaction temperature range of J-351 epoxy adhesive film was 70.92-127.21℃.(2)When the curing temperature was 85℃ and the curing time was 6 h,the shear strength of adhesive film could meet the requirements for edge connection of cockpit transparent parts.Adding pre-curing steps could effectively improve the wettability between adhesive film and organic glass or polyester ribbon.(3)The best effect was achieved by using 320 grit sandpaper for polishing and under vacuum pressure.(4)The relatively optimal process conditions were as follows:the surface of the organic glass was polished with 320 grit sandpaper,pre-cured at 70℃ for 1 h,cured at 85℃ for 6 h,and subject to vacuum bag pressure of 0.1 MPa.The shear strength of the edge connection adhesive component produced was about 234 kN/m,the fatigue cycle number of typical structural components could reach 150000 times,and the fatigue ultimate load could reach 8.352 kN,which could meet the requirements for edge connection of cockpit transparent parts.

关 键 词：固化温度 表面处理 加压方式 疲劳 

分 类 号：TQ430[化学工程]