Double-tractor submerged arc welding manufacturing method for seven-vertical-rib rotor support

The invention discloses a double-tractor submerged arc welding manufacturing method for a seven-vertical-rib rotor support, and belongs to the field of manufacturing of generator rotor supports. The problems that longitudinal welding seams of seven vertical ribs and a center body occupy large submerged arc welding equipment, the welding period is long, the production efficiency is low, the welding cost is high, and welding deformation is difficult to control are solved. According to the main technical scheme, double-tractor synchronous welding of the seven-vertical-rib rotor support is achieved through a triangular base plate, and symmetrical welding of large grooves and small grooves of the vertical ribs is achieved through a reverse deformation method and a sample plate; and by means of measures such as reasonable welding sequence setting, welding process parameters and groove form improvement, the production efficiency is remarkably improved, the welding cost is saved, welding deformation of the center bod