Roll forming (also known as roll forming or cold rolling forming) is a continuous process in which metal is formed from sheet metal and rolled material. It is produced by feeding a series of roll stations equipped with molded rollers (sometimes called roll dies) to produce uniform cross-sectional shapes. Each station has two or more rollers, and most type roll forming processes use two or more roller stations to gradually process the blank material until the finished shape is produced. The process is suitable for mass production, production and high precision long workpiece, and the operation intervention is minimal. Auxiliary additions such as notching, grooving, punching, embossing, bending and winding can also be carried out at the same time as the molding roll.
Roll forming can also be used to process parts that have been extruded. However, this use is limited to parts that do not change the wall thickness during the redesign. Industries using roll forming products include automobile, construction, office furniture, home appliances and household products, medicine, railway locomotives, aircraft, heating, ventilation and air conditioning (HVAC) industries. Roll forming can be divided into two categories: the use of pre-cutting to the required size of the metal to be processed process (pre-cutting or fixed-length method); A process in which a coil is used and then cut to the desired size after forming (post cutting method).
