Three-stage forging is a metalworking process, also known as progressive forging. It involves a series of forging processes to gradually change the shape and size of a metal billet, ultimately obtaining the desired part or product.

Three-stage forging typically includes the following three stages:

1. Preforming

In the preforming stage, the metal billet is hammered or pressure-processed to roughly achieve the desired shape and size. This stage primarily aims to change the overall shape of the billet and reduce its size.

2. Intermediate Forging

In the intermediate forging stage, the metal billet, after preforming, undergoes further processing and plastic deformation to obtain a more precise shape and size. This may involve more hammering, pressure processing, or rolling operations.

3. Finish Forging

In the finish forging stage, through a final round of forging processes, the metal billet is further shaped, its dimensional accuracy is improved, and the final product form is obtained. This stage typically involves more refined forging processes to achieve the desired geometry and surface quality.

Final Summary

The three-stage forging process offers the advantage of progressively adjusting the shape and size of the metal material, improving its mechanical properties, microstructure, and reducing defects. It is widely used in the manufacturing industry, particularly in automotive, aerospace, shipbuilding, and construction machinery, for producing high-strength, high-precision metal parts and components.