本机采用船形埋弧焊，焊接时工件不动，门架介行走，门架移动采用变频调速；横梁配备有二组导柱各带一套焊接机头，用电动机驱动来调节上下位移。用首动调节装置来调节左右位移；导弧机构对焊接进行机械式跟踪，焊缝质量高；焊药可自动回收，节省人力。

using cymbiform submerged arc welding; when welding, workpiece is fixed, but portal frame is, moved and the speed of moving is controlled by frequency varation; equipping aset of wedljng head at each2 groups of guiding post on the beam; using electric dynamo to drive to adjust shrting up and down; using manual adjusting device to adjust shifting left and right; processing mechanictracing the welding line with guiding arc mechanism, wich can get high quality of welding line; automatically recycling the solder, which can save the labor.