Multi-degree-of-freedom adjustable circular pipe fitting inner and outer girth welding mechanism

The invention relates to a multi-degree-of-freedom adjustable circular pipe fitting inner and outer girth welding mechanism, and belongs to the technical field of circular pipe fitting welding. Comprising a welding machine platform; a height-adjustable driving mechanism, a clamping mechanism, an adjustable V-shaped supporting mechanism and a multi-degree-of-freedom welding manipulator mechanism are sequentially mounted on the welding machine platform; the clamping mechanism is connected to the height-adjustable driving mechanism; a groove is formed in the welding machine platform; and the adjustable V-shaped supporting mechanism is mounted in the groove. The circular pipe fitting is arranged on the adjustable V-shaped supporting mechanism and moves at the set rotating speed under the action of the clamping mechanism and the height-adjustable driving mechanism, the welding manipulator is fixed after the position is adjusted, and automatic welding of the inner and outer circular seams of the circular pipe fitti