【摘要】 管壳式换热器中管子与管板胀焊结构接头的加工制作，是先焊后胀还是先胀后焊，至今仍有争论。详细分析比较了两种连接加工方法各自的优缺点及应用情况，提出了胀接与焊接先后次序选择应遵循的主要原则，得出了几点有用的结论。为实际生产选择合理的制造工艺、保证管子与管板连接接头的质量提供指导与保证。更多还原

【Abstract】 To this day there is still ongoing controversy about whether to expand first or weld first the tube to tube-sheet joint in heat exchangers. This paper presents a detailed analysis of the advantages. defects and application of the two manufacturing methods, puts forward the main princple in deciding its sequence, and some valuable conclusions are drawn from that.更多还原