Lock forming machine, also known as pittsburgh forming machine, snap forming machine. It is a multi - functional machine, mainly used for plate connection and round air duct closed connection bite processing. It can meet all kinds of different shapes of bone made by air duct. The thickness of the processed sheet is 0.5-1.5mm. All the gears, shafts and rollers of the machine are made of high-quality steel, which can meet the different requirements of the users through the strict heat treatment process to ensure the durability and quality of the machine, which is easy to install, beautiful in appearance, reasonable in mechanical principle, flexible in movement and convenient in operation. The bite machine is suitable for the production of air ducts of ventilation, air conditioning and purification devices. According to the requirements, it can be made into various square and rectangular thin sheet air ducts. It is an indispensable mechanical equipment for various sheet metal processing and air duct production.