Reduced Bends (Eccentric Reducers) are pipe fittings used to change the diameter of pipes. The commonly used forming processes include reducing extrusion, expanding extrusion, or a combination of both. For certain sizes of eccentric reducers, stamping forming can also be applied.

Contraction/Expansion Forming

The reduction forming process for male and female ends involves placing a tube blank with a diameter equal to the male end of the male and female ends into a forming die. Through pressing along the axial direction of the tube blank, the metal moves along the die cavity and shrinks into shape. Depending on the size of the diameter change of the eccentric tube, it is divided into single-step forming or multi-step forming.

b. Stamping成形

In addition to producing elbows using steel pipes as raw materials, some specifications of elbows can also be manufactured using sheet steel through the stamping forming process. The shape of the stamping die for stretching is designed based on the inner surface dimensions of the elbows, and the sheet steel after cutting is stretched into shape using the die.