Regardless of manual forging, cold forging or compressor free forge, the process is composed of a series of cold forging processes. Depending on the deformation properties and degree of deformation during the forging process, the cold forging step can be divided into a basic step, auxiliary step, and a trimming step.
The basic cold forging process step - A forging process that the sheet shape is obtained by a large deformation of the blank..
Cold forging process steps are: draw out, upsetting, punching, expansion, cutting, bending, twisting, shifting and forging.
Cold forging auxiliary processes - a forging process that changes in shape in advance by performing the formation of the basic procedure, such as the splice holder of the steel ingot, chamfering and shoulder cutting before step shaft section.
Cold forging trimming - Used to flatter the surface pits that have been shaped, remove whiskers or fly and other tiny defects, making the forgings a process that meets the shape.
1. Drawing out - a forging process that reduces the cross-sectional area of the blank and increase the length is called drawing out. Exceptionally to obtain forgings with long axis.
2. Upsetting - reduce the height of the blank and the increase cross-sectional area.
3. The punching - the forging process in which holes in the blank are fully penetrated or not fully penetrated is called punching..
4. Expansion - reduce the wall thickness of the hollow blank and increase the forging method of the outer diameter.
5 Cutting - cut the blank segmentation or partially cutting.
6 Bending - bend the blank into a certain angle or curve.
7 Twisting - a part of the blank rotates a certain angle with respect to another portion around its common axis.
8 Shifting - stagger one part of the forging relative to the other, but keep the axes of the two parts parallel.
9 Forging - a forging process that connects two or several blanks is called forging or forge welding. Forging is mainly used for the connection of the small blank.