拧紧工艺对复材构件临时紧固件夹紧力的影响  

Effect of Tightening Process on Clamping Force of Temporary Fasteners of Composite Components

作　　者：黄稳 严晨[2] 凡志磊 王华 HUANG Wen;YAN Chen;FAN Zhilei;WANG Hua(Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 201324,China;Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures,Shanghai Jiaotong University,Shanghai 200240,China;School of Mechanical Engineering,Shanghai Institute of Technology,Shanghai 201418,China)

机构地区：[1]中国商飞上海飞机制造有限公司,上海201324 [2]上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240 [3]上海应用技术大学机械工程学院,上海201418

出　　处：《机械制造与自动化》2022年第5期12-15,共4页Machine Building & Automation

基　　金：国家自然科学基金项目(51775350)。

摘　　要：针对航空复材装配过程中出现的临时紧固件夹紧力不明、控制误差大等问题,根据临时紧固件安装工艺实验,探讨拧紧工艺对临时紧固件夹紧力的大小及控制精度的影响。以典型的航空复材装配结构为研究对象,利用实验探索临时紧固件夹紧力的短时衰减规律。结果表明:对于变转矩拧紧气枪,夹紧力与安装气压之间近似呈线性关系;定转矩拧紧气枪能够降低临时紧固件夹紧力分散程度;临时紧固件夹紧力在拧紧完成后的4 h内衰退最快,占总衰退量的60%~70%,8 h后临时紧固件夹紧力趋于稳定。Aimed at the problems of unclear clamping force and large control error in the assembly process of aviation composite materials, the impact of the tightening process on the clamping force and control accuracy is discussed based on the temporary fastener installation process experiment. With the typical aerospace composite assembly structure as the research object, the short-term attenuation law of clamping force is explored by experiments. The results show that there is an approximately linear relationship between clamping force and installation air pressure for variable torque tightening air guns. Fixed torque tightening air guns can reduce the degree of clamping force dispersion. The clamping force decays fastest within 4 hours after the tightening is completed, roughly accounting for 60%-70% of the total decay, and the clamping force tends to be stable after 8 hours.

关 键 词：复合材料 拧紧气枪 临时紧固件 转矩 夹紧力 

分 类 号：TH69[机械工程—机械制造及自动化] V261[航空宇航科学与技术—航空宇航制造工程]