管路构件塑性变形连接技术研究进展及挑战

Being the key components that play the role of "blood vessel" life control lines, tubular fittings are widely used in fluids transmission components and structural parts of various advanced equipment such as aerospace, automobile and other fields. Generally, the working environment of tubular fittings is the most complex, and the reliability requirement is the most demanding in the whole equipment. The reliable connection of all kinds of pipe members is the bottleneck problem to ensure the safety and stability of service. Tube joining by plastic deformation technology has the advantages of high connection strength, high reliability, high efficiency and environmental protection during the connection process, and has been widely used in various pipeline connection processes. However, with the further improvement of all kinds of advanced equipment for long life, high efficiency, lightweight and high reliability requirements, tube joining technology is facing new challenges. In this paper, the latest research progress of tube joining by plastic deformation technology is reviewed from the aspects of plastic forming, assembly connection and service performance. Based on the analysis of the above research, the development trend and technical challenges of tube joining by plastic deformation technology are summarized.