To solve the problems of joining between materials with poor weldability,a new joining method using rotary swaging technology to accomplish tube-tube and tube-bar joining was proposed.The finite element analysis and experimental study of the process of rotary swaging joining were carried out,the material flow laws of the process of rotary forging joining were revealed,and the process parameters affecting the strength of the joints were obtained.The experimental equipment was the self-developed small rotary forging equipment based on energy control,and the materials were T2 copper tube,6061 aluminum tube and plastic bar.The finite element analysis of rotary swa-ging joining process was conducted,and material flow and joining process parameters were provided.The results show that the stable joints are formed by rotary swaging joining process.The smaller the joining length,the easier it is to pull the connector.The diameter shrinkage is the main factor affecting the strength of the joint,and the strength of the joint increases with the increase of the diameter reduction in a certain range.When the diameter shrinbage is too large,the inner tube will break in the process of rotary swaging,and the joints can not be formed.The experiment results show that when the diameter reduction amount is 0.8 mm,the strength of Cu tube-Al tube joints rea-ches 62％of the strength of the Al tube,the strength of the Cu tube-Cu tube joints reaches 68％of the strength of the inner Cu tube,and the strength of the Cu tube-plastic bar joints reaches 63％of the strength of the plastic bar.
NETL
NSTL
万方数据
维普
