TDC flange is one of two universal flange manufacturing systems in the world. Its hermetically sealed, rugged joint construction can greatly save time and materials. Therefore, it is especially suitable for the production of large section air duct. Today, many famous buildings in the world have adopted this structure in the ventilation system, such as the Kennedy Space Center in the United States, City Square in Guangzhou and so on. This machine is composed of feeding frame, cold rolling forming machine and cutting machine. Cutting machine can be fixed size cutting, small burr, speed 6m/min. Control way: PLC+HMI, frequency conversion.