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How Many Kinds of Forging Processes?

With the rise of forging industry, a large number of forging products are promoting  the development of military industry. For example, forging products are used in aircraft, tanks, artillery, and even aircraft carriers. What are forging processes? Let Gulex tell you!

Forging process can be divided into free forging, die forging, ring rolling and special forging.

1. Free Forging

Free forging refers to the deformation of the blank to produce the required forging products with certain geometry and quality. The deformation can be achieved through simple universal tools or directly exerting force on the blank between the upper and lower anvil of forging equipment. Forgings produced by the free forging are called free forgings. Free forging is mainly used to produce small batch of forgings. Free forging employs forging hammer, hydraulic press and other forging equipment  to form the blank and create qualified forgings. The basic process of free forging includes upsetting, drawing, punching, cutting, bending, torsion, shifting and welding.  Free forging all adopts hot forging.

2. Die Forging

Die forging includes open die forging and closed die forging. During the process of die forging, the metal blank is compressed and deformed in the forging die with certain shape to manufacture the forging. Die forging is generally applied to produce parts with small weight and large batch. Die forging can be classified into hot forging, warm forging and cold forging. Warm forging and cold forging are the future direction of die forging development, and represent high-level forging technology.

3. Ring Rolling

Ring rolling refers to the production of annular parts with different diameters by ring rolling machine. It is also used to produce wheel-shaped parts such as automobile hubs and train wheels.

4. Special Forging

Special forging includes roll forging, cross wedge rolling, radial forging, liquid die forging and so on, which is more suitable for producing parts of certain shapes. For example, roll forging can be used as a pre-forming process to greatly reduce the subsequent forming pressure; cross wedge rolling can produce steel balls, transmission shafts, etc.; radial forging can produce large-scale barrel, step shafts and so on.