I . Brief Introduction of the Product A . Function and Usage It is an ideal equipment for automatic submerged arc welding of I-steel and similar components. Its operating principle is as follows: Put the workpiece onto the stand of workpiece. The cantilever mounted with submerged arc welding head moves horizontally and up and down on the gantry, and makes the tip to align the weld, realize automatic tracking of the weld by means of CNC system. Then the gantry move straightly on the tracks to carry out the welding automatically and two welds may be welded with the machine at the same time. B . Specifications and Devices Effective welding stroke L (according to the requirement of users) Welding speed 150 -1500mm /min Returning speed 3900mm /min Up-and-down travel of the welding head: 800mmLeft and right travel of the two welding arms: 800mm Up-and-down motor of welding arm 1.5KW Track space of gantry: 4000mm