A rolling mill is a machine that shapes and reduces the thickness of metal by passing it between a pair of rotating rolls. It is commonly used to process materials like steel, aluminum, and copper, as well as precious metals like gold and silver. Rolling mills are used in many industries, including manufacturing, construction, and jewelry making
- Rolling mills come in various sizes and configurations, from small benchtop models to massive industrial machines. The rolls can be smooth or textured, depending on the desired finish of the material. The rolls can also be shaped to produce specific profiles, such as round, square, or flat bars.
- There are several types of rolling mills, including two-high mills, three-high mills, and four-high mills, each with different roll configurations and capabilities.
Two-high mills, three-high mills, and four-high mills are different types of rolling mills used in metalworking to reduce the thickness of metal sheets or to shape them into specific forms. Each type of mill has its own advantages and disadvantages, depending on the specific application and requirements.
- A two-high mill has two rolls that rotate in opposite directions, and the metal is passed between them to reduce its thickness. This type of mill is used for flat rolling, where the metal is compressed between two rollers that are parallel to each other.
- A three-high mill has three rolls, with the top and bottom rolls rotating in the same direction and the middle roll rotating in the opposite direction. This type of mill is used for shaping and reducing the thickness of metal sheets or for producing special shapes such as T-bars and angles.
- A four-high mill has four rolls, with two smaller work rolls and two larger backup rolls. The metal is passed between the work rolls, which compress and shape it, while the backup rolls provide support and control the thickness of the metal. This type of mill is commonly used for cold rolling of sheets and strips, where the metal is worked at lower temperatures to improve its surface finish and mechanical properties.