Cantilever backing welding is performed before submerged arc welding of box girders to prevent large currents from burning through the bottom of the weld. It is composed of a trolley, a welding arm, a welding gun mechanical tracking device, a pneumatic system, an electrical control system, a welding machine recovery system, and a gas welding power supply.
Backing welding of box girder generally adopts single arc single wire method, or double arc double wire method.
|Applicable Workpiece Size||300-1200mm|
|Welding Position||Horizontal welding|