Cold welding sealing of copper-water micro heat pipe ends  

作　　者：汤勇 陆龙生 邓大祥 袁冬 

机构地区：[1]School of Mechanical and Automotive Engineering, South China University of Technology

出　　处：《中国有色金属学会会刊：英文版》2009年第3期568-574,共7页Transactions of Nonferrous Metals Society of China

基　　金：Projects(50436010, 50705031) supported by the National Natural Science Foundation of China;Projects(07118064, 8151064101000058) supported by the Natural Science Foundation of Guangdong Province, China

摘　　要：The quality of micro heat pipe(MHP) is strongly affected by sealing technology. Based on the analysis of requirements of sealing technology, a cold welding technology was presented to seal MHP. In the cold welding process, compression force was used to flatten micro groove copper(MGC) tube. Then the bonding of MGC tube was reached because of intensively plastic deformation of MGC tube under pressure. It is found that the plastic deformation area of the cold welding of MGC tube can be divided into three sections. The deformation of micro grooves in each section was investigated; the influence of the dimensions of cylindrical heads on the weld joint shape and strength was studied; and a comparison between smooth copper tube and MGC tube was done. The results show that a groove compression stage exists in the cold welding of MGC tube besides a flattened stage and a melting stage.The quality of micro heat pipe（MHP） is strongly affected by sealing technology. Based on the analysis of requirements of sealing technology, a cold welding technology was presented to seal MHP. In the cold welding process, compression force was used to flatten micro groove copper（MGC） tube. Then the bonding of MGC tube was reached because of intensively plastic deformation of MGC tube under pressure. It is found that the plastic deformation area of the cold welding of MGC tube can be divided into three sections. The deformation of micro grooves in each section was investigated; the influence of the dimensions of cylindrical heads on the weld joint shape and strength was studied; and a comparison between smooth copper tube and MGC tube was done. The results show that a groove compression stage exists in the cold welding of MGC tube besides a flattened stage and a melting stage.

关 键 词：密封技术 微型热管 铜管 冷焊 塑性变形 MGC 焊接技术 焊接工艺 

分 类 号：TG457.1[金属学及工艺—焊接]