Scanning electron beam brazing of thin-wall capillary tube-sheet structure

摘要

This paper is aimed at research on brazing technological parameters of thin-wall capillary tube-sheet joints with vacuum scanning electron beam (VSEB) heating system, which is a full automatic closed-loop control system and can be used to program and generate any expected scanning tracks by computer virtual technique. As the new method is adopted, general brazing defects such as erosion, burning through, jam will be prevented effectively. Therefore various thin-wall tube-sheet structures can be brazed successfully, and welding quality and brazing productivity have been raised immensely.