The invention discloses a middle trough
welding production line which comprises an internal drawing-out
welding module used for conducting
welding operation on the hollow
cavity wall of a middle trough; the external welding module is used for welding the outer surface of the middle trough; the logistics module comprises a feeding table, a discharging table, a rail and a carrying
robot, the feeding table is arranged at the head end of the rail and used for supporting and placing the middle groove, the discharging table is arranged at the
tail end of the rail and also used for supporting and placing the middle groove, and the rail is arranged on one side of the internal welding module and one side of the external welding module; and the internal pulling-out welding module and the welding module are sequentially arranged in the extending direction of the track, the carrying
robot is used for carrying the middle trough from the feeding table to move to the internal pulling-out welding module and the external welding module along the track for welding operation, and after welding operation is completed, the carrying
robot carries the middle trough to the discharging table. The turnover efficiency of the middle trough is improved, and the
mechanization and
automation degree in the middle trough transportation process is improved.