Analysis of the movement mode of forging die


发布时间:

2024-02-21

According to the movement mode of the forging die, forging can be divided into oscillating rolling, oscillating forging, roll forging, cross wedge rolling, ring rolling and cross rolling. Oscillating rolling, oscillating forging and rolling rings can also be processed by precision forging. In order to improve material utilization, roll forging and cross rolling can be used as front-end processing of slender materials. Rotary forging, like open forging, is also locally formed. Its advantage is that it can be formed with a small forging force compared to the size of the forging.

According to the movement mode of the forging die, forging can be divided into oscillating rolling, oscillating forging, roll forging, cross wedge rolling, ring rolling and cross rolling. Oscillating rolling, oscillating forging and rolling rings can also be processed by precision forging. In order to improve material utilization, roll forging and cross rolling can be used as front-end processing of slender materials. Rotary forging, like open forging, is also locally formed. Its advantage is that it can be formed with a small forging force compared to the size of the forging.

 

Forging industry

 

In this forging method including free forging, the material expands from near the die surface to the free surface during processing. Therefore, it is difficult to ensure accuracy. Therefore, by using a computer to control the movement direction of the forging die and the rotary forging process, a lower The forging power is used to obtain products with complex shapes and high precision, such as forgings such as steam turbine blades with many varieties and large sizes. The die movement and degree of freedom of forging equipment are inconsistent. According to the deformation limitation characteristics of the bottom dead center, forging equipment can be divided into the following four forms:

1. Form of limiting forging force: hydraulic press with hydraulic pressure directly driving the slider.

2. Quasi-stroke limitation method: Hydraulic press with hydraulically driven crank and connecting rod mechanism.

3. Stroke limitation method: a mechanical press in which the crank, connecting rod and wedge mechanism drive the slider.

4. Energy limitation method: spiral and friction press using spiral mechanism.

In order to obtain high accuracy, attention should be paid to preventing overloading at the bottom dead center and controlling the speed and mold position when performing hot tests on heavy-duty aviation die forging hydraulic presses. Because these will have an impact on forging tolerances, shape accuracy and forging die life. In addition, in order to maintain accuracy, attention should also be paid to adjusting the slider guide rail clearance, ensuring stiffness, adjusting the bottom dead center, and using auxiliary transmission devices.

 

Forging industry

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