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Aluminum alloy container side box plate welding fully automated production line consists of assembly station, side box assembly and side beam welding station, side box manual trimming and flipping position station, side beam secondary welding station, side box longitudinal weld welding station, logistics conveyor line and whole line operation monitoring system. The space is 100 meters long, 5 meters wide and 5 meters high. The overall layout is arranged in a straight line. The assembly line operation method makes the overall structure reasonable, convenient for production site management, and has high production efficiency.