Copper part forging equipment and method

Abstract

The invention discloses copper part forging equipment and method. The copper part forging equipment and method have the characteristics of high forging efficiency and good forming quality. The technical scheme is characterized in that the equipment comprises a multi-directional die forging hydraulic device and a hydraulic driving system; the multi-directional die forging hydraulic device comprisesa rack, a lower die, an upper die, a top stamping cylinder, a rear side stamping cylinder, a left side stamping cylinder and a right side stamping cylinder, a rear lifting pin, a left lifting pin anda right lifting pin are further arranged between the upper die and the lower die, the lower die is fixed to the rack, the top stamping cylinder is fixed to the rack and used for driving the upper dieto ascend and descend, the rear side stamping cylinder is fixed to the rack and used for driving the rear lifting pin to stretch out and draw back, the left side stamping cylinder is fixed to the rack and used for driving the left lifting pin to stretch out and draw back, and the right side stamping cylinder is fixed to the rack and used for driving the right lifting pin to stretch out and draw back; and the hydraulic driving system is used for controlling the operation states of the top stamping cylinder, the rear side stamping cylinder, the left side stamping cylinder and the right side stamping cylinder. The copper part forging equipment and method are applicable to the technical field of forging.

Description

technical field [0001] The invention belongs to the technical field of forging, in particular to forging equipment and a forging method 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 cavit...

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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