The cold roll forming of profiles, in terms of techniques, is similar to the process of bending. It is not a pure rolling process, but a special production method. The profile manufactured by this method has thin walls and light in weight, but has high rigidity, complex shapes and large length.
The main equipment for the cold roll profile production is the cold roll forming unit, and there are many classifications. According to the products it produced, the forming machine can be divided into a profile forming machine and an electric welded pipe forming machine. According to the frame type, it can be divided into cantilever type forming machines and gantry type forming machines. According to the structure of the forming machine, it can be divided into roller-type forming machine, row roller-type forming machine and crawler forming machine.
The horizontal roller is the transmission rack and undertakes the main task of tube blank deformation. The upright roller is passive, and set up between two horizontal rollers or in groups. Its main function is to guide and also participate in partial deformation and prevent the deformed strip from springing back.
When the metal strip passes through several pairs of perforated rollers in turn, it is fed forward with the rotation of the rollers, and continuously bent at the same time, in order to obtain the desired cross-section shape pieces. It can be seen that roll forming is a continuous bending forming method. The strip begins to bend and deform at the entrance of the roller and moves forward at the same time. When it reaches the central section 4 of the roller, the forming in the second pair of rollers ends, the strip passes through the roller, and then enters the third pair of rollers.
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