hollowrolled

Hollowrolled refers to a manufacturing process used to create cylindrical or tubular metal components. The core principle involves taking a solid metal billet or rod and progressively reducing its outer diameter while simultaneously forming a hollow center. This is typically achieved through a series of rolling operations, often involving specialized rolling mills.

The process can be performed hot or cold, depending on the desired material properties and tolerances. Hot hollow rolling involves heating the metal to a high temperature, making it more malleable and easier to deform. This method is often used for producing seamless tubes with larger diameters. Cold hollow rolling is performed at room temperature and results in products with tighter dimensional accuracy and improved surface finish, but it requires more force and can induce work hardening.

Hollowrolling is a versatile method used in the production of a wide range of products, including seamless pipes, tubes for automotive and aerospace applications, structural components, and various precision parts. The ability to create hollow sections without welding is a key advantage, leading to greater strength and integrity in the final product. The specific type of hollowrolling mill and the number of passes required depend on the desired final dimensions and the properties of the metal being processed.