The common form of forging

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Forging is a processing method that deforms the metal by impact or pressure between the upper and lower anvil or forging die. It can be divided into free forging and model forging.

If the shape of the workpiece is the only requirement, forging is only one of many formable processing processes. However, in many cases, forging is the only way to obtain the necessary mechanical properties. In order to obtain all the advantages of the forging process, the requirements for its performance must be indicated in the forging process specification. The process specification shall include requirements for material standards and any additional requirements, as well as possible exceptions. In addition, the minimum tensile properties required and the maximum and minimum hardness at the specific position of the part shall be indicated.

During free forging, the processed metal is compressed and deformed between the upper and lower anvil, and the metal can flow freely in all directions of the horizontal plane, so it is called free forging.

The equipment and tools used in free forging are universal, and the quality and size of forgings vary. However, the shape and size of free forgings are mainly guaranteed by the operation technology of forging workers, which requires high technical level of forging workers, high labor intensity, low productivity, low precision of forgings, large machining allowance, and can not obtain more complex shapes. Therefore, it is mainly used for single piece, small batch production and repair. For large forgings, free forging is the only production method.

There are two kinds of free forging: manual forging and machine forging.

Manual forging is a processing method that uses anvil, sledgehammer, small hammer, pliers, punch, chisel, hammer and other tools to deform the blank into forgings. The equipment and tools used in manual forging are simple and less investment, but the labor intensity is high and the productivity is low. It is suitable for repair work and auxiliary work of machine forging.

Manual forging is carried out by the cooperation of palm fitter and hammerer. The palm fitter holds the pliers with his left hand to clamp, move and turn the workpiece; The right hand holds a small hammer, which is used for forging with small deformation and directing the operation of Hammerers. The hammerer holds the sledgehammer with both hands and stands outside the anvil to hammer.