In the spinning process, the metal material, such as sheet or pipe, is first clamped on the mandrel of the spinning machine, so that it rotates with the mandrel at high speed. Then, a rotating wheel is applied to the rotating metal material to cause continuous local plastic deformation of the material. Just like pinching the rotating clay by hand, by gradually changing the shape of the material, the required rotating body parts are eventually formed, such as various cylindrical parts, conical parts, etc. Spinning can be divided into ordinary spinning and strong spinning. Ordinary spinning is mainly used to change the shape of the blank; Strong spinning can significantly change the thickness of the material. In daily life, the lamp shade of lamps, metal vases, and kitchenware are commonly manufactured by ordinary spinning processes. The wheels of automobiles use strong spinning, and the cast or forged wheel blanks can be processed into finished wheels with accurate dimensions and good mechanical properties