Double-face double-arc welding method for complex curved surface component of special vehicle

The invention provides a double-face double-arc welding method for a complex curved surface component of a special vehicle. The double-face double-arc welding method comprises the steps that a welding groove of a single bottom plate is machined; a plurality of single bottom plates are spliced; the assembled U-shaped bottom plate is pressed tightly through a tool, and positioning spot welding is carried out; and carrying out double-sided double arc welding on the U-shaped bottom plate after spot welding. According to the method, penetration of the bottom plate weld root can be guaranteed, the welding strength is high, welding defects are reduced, weld surface forming is uniform, and the overall surface quality of a product is improved; through simultaneous welding of the front face and the back face, welding deformation of a product can be greatly reduced, the overall welding deformation (transverse deformation, longitudinal deformation and twisting deformation) is smaller than or equal to 4 mm, the stress sta