A kind of forging equipment and forging method of copper parts

Abstract

The invention discloses a forging equipment and a forging method for copper parts, which have the characteristics of high forging efficiency and good forming quality. The hydraulic equipment includes a frame, a lower die, an upper die, a top stamping cylinder, a rear stamping cylinder, a left stamping cylinder and a right stamping cylinder, and there are rear ejector pins, left ejector pins and The right ejector pin, the lower die is fixed on the frame, the top stamping cylinder is fixed on the frame and used to drive the upper die up and down, the rear stamping cylinder is fixed on the frame and used to drive the rear ejector pin to expand and contract, the left stamping cylinder It is fixed on the frame and is used to drive the expansion and contraction of the left top pin, and the right stamping cylinder is fixed on the frame and is used to drive the expansion and contraction of the right top pin. The hydraulic drive system is used to control the top stamping cylinder, rear side stamping cylinder, left cylinder and the running state of the right stamping cylinder, the present invention is applicable to the field of forging technology.

Description

technical field [0001] The invention belongs to the technical field of forging, in particular to forging equipment and a forging process for copper parts. Background technique [0002] When existing copper parts are used to forge boiler valves and other components, they are usually forged with a die forging hammer, which can forge the outer structure, but cannot directly forge the inner hole structure, which needs to be processed entirely by cutting and drilling. , leading to poor internal forgeability, which affects internal quality, and a large amount of waste will be generated in the inner hole, and the processing efficiency is low. Therefore, this design adopts a hot forging die structure that is directly punched during the forging process; [0003] However, the working conditions of the hot forging die are very harsh. It has to withstand high temperature, high pressure, and severe friction caused by the violent flow of the hot metal blank on the surface of the mold cavi...

AI Technical Summary

Problems solved by technology

[0002] When existing copper parts are used to forge boiler valves and other components, they are usually forged with a die forging hammer, which can forge the outer structure, but cannot directly forge the inner hole structure, which needs to be processed entirely by cutting and drilling. , leading to poor internal forgeability, which affects internal quality, and a large amount of waste will be generated in the inner hole, and the processing efficiency is low. Therefore, this design adopts a hot forging die structure that is directly punched during the forging process;

[0003] However, the working conditions of the hot forging die are very harsh. It has to withstand high temperature, high pressure, and severe friction caused by the violent flow of the hot metal blank on the surface of the mold cavity, which can easily lead to cracks, damage and thermal wear on the surface of the punch. The life of hot forging dies is low, and the forming quality is poor. Therefore, in order to prevent the punches from sticking to the billet, die jamming, and improve product accuracy, it is usually necessary to lubricate the stamping punches. However, the existing lubrication method needs to be carried out by stopping the machine and spraying. Lubrication, low efficiency, poor spray uniformity, and difficult to control the effective spray amount;

[0004] In addition, thermal stress plays a decisive role in the total stress of the hot extrusion punch. When the temperature of the punch is too low, there is a large difference between the temperature of the blank and the temperature gradient inside the punch. Large thermal stress will cause damage to the punch and affect the forming accuracy. However, when the temperature of the punch is too high, although the thermal stress can be reduced, the yield strength of the punch will decrease. Therefore, in order to reduce the temperature gradient and ensure the yield strength, it is necessary to Effectively control the temperature range of the punch

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