摘要
压铆是飞机装配过程中常用的机械连接方式,适当的加载压铆力可以减小铆接造成的铆接件变形,提高装配效率和装配性能。本文提出将压铆过程划分为5个阶段,分析每个阶段的金属流动方向和受力情况;并在此基础上给出压铆过程的所需压铆力的计算方法,最后以直径为4 mm的沉头铆接为实例进行计算,与实验数据进行对比,验证公式的正确性。
As one of the most common methods used in mechanical joint, pressing rivet has been applied in airplane manufacturing widely. Suitable upsetting force is beneficial to reducing deformation and residual stress induced by pressing rivet. In this paper, a simple method for calculating the upsetting force is presented. Based on the development of metal flow, the whole joining process is divided into five stages. In every stage, the force of rivet and plane as well as the deformation are analyzed. In the period of elastic deformation, the process of pressing rivet is regarded as plane upsetting; and in the period of plastic deformation, the process of pressing rivet is regarded as forging. The calculation formula are derived from the theory of upsetting and forging. The specification of rivet and plane is also considered in the formula. Finally, a countersunk rivet whose diameter is 4 mm is studied as an example to verify the formula.
出处
《机械科学与技术》
CSCD
北大核心
2009年第4期514-516,521,共4页
Mechanical Science and Technology for Aerospace Engineering
基金
国家863/CIMS课题项目(2006AA04Z137
2007AA041903)
西北工业大学翱翔之星计划项目资助
关键词
压铆
阶段划分
压铆力
扩张量
rivet
pressing rivet
stage division
upsetting force
