As the special box beam welding auxiliary equipment, the gantry box beam welding machine is designed with gantry structure, bi-side driving and frequency poleless speed-adjusting. Welding tracking is achieved by the mechanical guide pulley device. The operation on right and left sides is conducted through pneumatic control. To enhance the efficiency of fillet weld, the welding mode is double arc double wire and the wire feeder is separate from the arc-guide mechanism. The welding flux protective device is available for the gantry box beam welding machine to avoid welding flux scattering too much. The work piece can be placed with fixed mount. It can also be transported on roller conveyor, which can cooperate with the other equipment to form production line.

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