Study on Extrusion of Aluminum Microchannel Flat Tube
Micro-channel tube with submillimeter-diameter channels is a kind of newly developed heat transferring tube.As the micro-channel tube has many welding points and works under high pressure condition,welding strength is one of the key issues for its extrusion process.This paper presented a new study on evaluation of the seam welding strength formed in the extrusion process.Firstly,FE simulation is carried out for the status of the billet in the welding chamber during the extrusion process.Then,thermo mechanical experiment is done to study the relationship between the welding strength and key factors.The welding process is characterized as the void evolution on the welding interface,which consists of void generation,void cohesion and void closure.Combining the relationship with the numerical results,welding strength of the micro-channel tube can be evaluated.The extrusion die is developed and the microchannel tube is successfully extruded.The study is helpful for the optimization the extrusion process and improvement of the seam weld quality.
Micro-channel Tube Extrusion Extrusion Welding Void Evolution
Ding Tang Qingqing Zhang Dayong Li Yinghong Peng
School of Mechanical Engineering,Shanghai Jiao Tong University,800 Dongchuan Road,Shanghai 200240,P.R.China
国际会议
沈阳
英文
128-134
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）