Cooling tower metal plate air duct and machining method and device thereof

The invention discloses a cooling tower metal plate air duct and a machining method and device thereof, and relates to the technical field of cooling towers. The flange edges are butted and combined end to end to form a circular ring; side folded edges are arranged on the two sides of the cylinder wall plate, and end folded edges are arranged at the two ends of the cylinder wall plate; mounting holes are distributed in the flange edge, the side folding edge and the end folding edge; the side folding edge is divided into a plurality of sections through notches uniformly formed in the side folding edge; semicircular holes are formed in the two ends of the flange edge. The cylinder wall plates are bent to be in an arc shape and then connected end to end through bolts to form a cylinder. The circular ring is connected with the end face of the cylinder through a bolt. The air duct structure of the cooling tower is more stable, the roundness is higher, the machining cost is reduced, the machining equipment investme