Closed die forging die and closed die forging method

Abstract

The invention relates to the field of closed die forging and discloses a closed die forging die and a closed die forging method. The closed die forging die comprises an upper die body and a lower die body. A material barrel is arranged on the upper die body or the lower die body. The closed die forging die further comprises a stamping rod which stretches into the material barrel. The closed die forging method comprises the steps that a, a blank is heated, the closed die forging die is opened, and the blank is put into a die impression of the closed die forging die; b, the upper die body and the lower die body are closed and locked; c, the stamping rod stamps downwards, so that the die impression is filled with the blank; and d, after the blank is subjected to die forging and forming, the closed die forging die is opened, and a forging is taken out. According to the closed die forging die and the closed die forging method, the technical scheme is adopted, and the requirement for the pressure of a forging machine in the die forging process can be reduced, so that the die cavity is filled with the blank in an extrusion mode, the forging reject ratio is decreased, and the forging production cost is reduced.

Description

technical field [0001] The invention relates to the field of closed die forging, in particular to a die and a closed die forging method using the die. Background technique [0002] Open die forging refers to die forging with flash. In traditional open die forging, the flash is longer and thicker, which not only wastes the billet, but also requires large-tonnage equipment due to the large forming force. [0003] Block forging means that in a closed cavity, through two or more molds moving in one direction or in opposite directions, the metal is extruded to fill the cavity, so as to obtain forgings without flash, which can reduce materials and reduce costs. However, in closed forging, due to the need to obtain a large amount of deformation and complex profiles in one deformation, the forging machine is required to provide a huge forging pressure to act on the die; If the pressure is too small, it is difficult for the billet to fill the entire die cavity, and it is easy to cau...

AI Technical Summary

Problems solved by technology

However, in closed forging, due to the need to obtain a large amount of deformation and complex profiles in one deformation, the forging machine is required to provide a huge forging pressure to act on the die; If the pressure is too small, it is difficult for the billet to fill the entire die cavity, and it is easy to cause the billet to fail to fill the die cavity and produce waste products. Therefore, the forming force is geometrically increased compared with the complexity of the forging shape.

The greater the forming force, the greater the pressure of the forging machine, the higher the purchase and maintenance costs of the forging machine, and the higher the production cost of forgings.

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