The rolling process usually takes place in special machines called rolling mills. These are devices that consist of three or four rollers. One of them is at the top and is mainly used to introduce the element into the process. The side rollers are designed to bend and wrap a sheet of metal or other used element. The shape is formed by the movement of the rollers. Each of them can rotate around its axis, and the side rollers can also move vertically and horizontally. During forming, the material is subjected to pressures from the drive of the rolling mill. Most often this is hydraulic, which ensures that sufficient forces are obtained. Under their influence, the yield point in the element is exceeded, which results in local reinforcement of the detail and organization of the material structure. The most common diagnoses are an increase in tensile strength and a slight decrease in ductility.