Gantry welding operator is divided into two types: bridge type and portal type. Bridge welding operator is composed of beam and two pallets supporting and walking. Welding head can be moved horizontally along the beam, and pallet can be moved longitudinally along the track. The door type welding operation machine is more than the bridge type one door frame, the welding machine head may make the crosswise movement on the gate beam, or may make the crosswise movement on the crossbeam which along the gate pillar fluctuation rises and falls, the latter may use in the different height welding structure welding. The bridge welding operator is suitable for the welding of large area flat plate splicing or hull plate frame structure.
Gantry welding machine is mainly used for welding the longitudinal seam and circular seam of cylindrical workpiece in the process of pressure vessel manufacturing. Gantry welding operator consists of gantry operating frame, walking mechanism, lifting mechanism, operating platform, operator electrical control system and safety alarm device. It is characterized by stable operation, safety and reliability, simple operation and strong applicability.