Aluminum Processing: Rolling
Rolling is the process in which the ingot is pulled into the rotating roll by friction. The ingot is reduced in cross section by the pressure applied by the rolls, the shape is changed, the thickness is thinned, and the length is increased. Rolling a plastic deformation process.
According to the different rotation directions of the rolls, the rolling can be further divided into vertical rolling, cross rolling and cross rolling. In the longitudinal rolling, the working rolls rotate in opposite directions, and the longitudinal axis of the rolling stock is perpendicular to the axis of the rolls. Longitudinal rolling is the most commonly used method for flat roll rolling of aluminum alloy sheets, strips and foils; in cross rolling, the working rolls rotate in the same direction, and the longitudinal axis of the rolled stock is parallel to the roll axis. Cross rolling is rarely used in aluminum alloy sheet strip rolling; in the case of cross rolling, the working rolls rotate in the same direction, and the longitudinal axis of the rolling stock is inclined at a certain angle with the roll axis. Cross-rolling is often used for the production of aluminum alloy pipes and some shaped products.
Depending on the roll system, aluminum alloy rolling can be divided into two-roll rolling, multi-roll rolling and special rolling (such as planetary rolling, V-rolling, etc.) rolling. Depending on the shape of the rolls, aluminum alloy rolling can be divided into flat roll rolling and hole roll rolling. According to different product varieties, aluminum alloy rolling can be divided into plate, belt and foil rolling, bar, flat bar and profiled profile rolling, pipe and hollow profile rolling.