Open die forging


Open die forging refers to the processing method of forgings that use simple  tools or directly apply external force to the blank between the upper and lower anvils of the forging equipment to deform the blank to obtain the required geometric shape and internal quality. The forgings produced by the Open die forging method are called open die forgings.

Open die forging mainly produces small batches of forgings. Forging equipment such as forging hammers and hydraulic presses are used to form the blanks to obtain qualified forgings. The basic procedures of Open die forging include upsetting, drawing, punching, cutting, bending, twisting, shifting and forging. Open die forging adopts hot forging method.

The Open die forging process includes basic processes, auxiliary processes, and finishing processes.

The basic processes of Open die forging: upsetting, drawing, punching, bending, cutting, twisting, shifting and forging, etc. The most commonly used in actual production are the three processes of upsetting, drawing and punching.

Auxiliary process: pre-deformation process, such as pressing jaws, pressing steel ingot edges, cutting shoulders, etc.

Finishing process: the process of reducing the surface defects of the forging, such as removing the uneven surface of the forging and shaping.

The advantages of Open die forging: Forging flexibility is large; the tools used are simple general tools; forging forming is to gradually deform the blank in different regions. Therefore, forging Similarly, the tonnage of forging equipment required for forgings is much smaller than that of model forging; the accuracy requirements for equipment are low; and the production cycle is short.

Open die forging equipment mainly includes air hammers, free forging electro-hydraulic hammers, free forging hydraulic presses, forging manipulators, forging charging and reclaiming machines, ring rolling machines, etc.