Flow Forming
Flow forming, also known as tube spinning, is one of the techniques closely allied to shear forming. In this process, the metal is displaced axially along a mandrel, while the internal diameter remains constant. It is usually employed to produce cylindrical components. The starting blank can be in the form of a sleeve or cup. Blanks can be produced by spinning, deep drawing or forging plus machining to improve the dimensional accuracy. In many cases, flow forming is combined with splitting & shear forming processes to produce cylindrical components with flanges of stepped intersections.