【摘要】 在长输管道焊接施工过程中,环缝根焊的焊接工艺选择是决定管道施工速度和质量的关键。重点介绍了目前国际管道施工中先进的根焊设备——内焊机的结构及工作原理。概述了管道内环缝多焊头自动焊机整体结构和焊接工艺,分析比较了管道施工中各种根焊的方法及特点。更多还原

【Abstract】 in the process of long-distance pipeline construction,the choose of welding technology of ringlike seam root welding is the key of speed and quality of pipeline construction.this paper introduces emphastically the constructure and principle of pipeline internal welding machine,summarizes its whole constructure and welding process,and compares the methods and characteristic of root welding.更多还原