The closed-type ring rolling machine is to cover the blank heated and punched with small holes on the core roller, and drive the blank to rotate by the inner edge of the roller, so as to realize the thinning of the blank thickness and the expansion of the diameter. The limitations of this process method and structure have been rarely adopted. Products are widely used in machinery, automobiles, trains, ships, petrochemical, aviation, aerospace, atomic energy, wind power and many other industrial fields.
The working principle is: ring rolling is a plastic processing technology that produces continuous local plastic deformation of the ring with the help of a ring rolling machine, and then realizes the reduction of wall thickness, the expansion of diameter and the formation of cross-section profile. It is mainly used to produce ring mechanical parts of various shapes and sizes.