2.3 Hydraulic three roll bending machine
The upper roller of the hydraulic three-roller bending rolls can be vertically raised and lowered, and the vertical lifting hydraulic transmission is obtained by the hydraulic oil in the hydraulic cylinder acting on the piston rod.
The lower roller is driven to rotate, and there is a supporting roller under the lower roller, which can be adjusted.
3.1 Symmetrical three roll bending machine
Simple structure, light weight, easy manufacturing and maintenance, and low investment. The rollers on both sides can be made very close and the forming is more accurate, but the remaining straight edges are large.
The disadvantage of the 3 roll symmetrical plate rolling machine is that the end of the plate needs to be pre-bent with other equipment.
Applicable scope and conditions: equipped with pre-bending equipment or all kinds of bending work that do not require bending, use a symmetrical type.
3.2 Asymmetric 3-roller bending machine
Features: this machine can roll small diameter cylinders, and the end can be formed on this machine at one time
Advantages: compact structure, convenient operation and maintenance.
3.3 Hydraulic 3 roll plate bending machine
The work is stable, the impact and vibration are small, and the noise is small, which has great benefits to the health of workers, the foundation of the plant, the surrounding environment and the equipment itself.
Easy to adjust pressure and speed.
Using the hydraulic pressure of the working fluid to transfer energy can be made using the method of regulating the pressure limiting and regulating the various pressure control valve, and the overload can be reliably prevented, and help protect the die equipment.
Large adjustment range of the moving speed of the moving beam, can be adapted to different requirements of different processes operating speed.
It is easy to get larger total pressure and larger working space. This is the most prominent advantage of hydraulic presses.
Based on the principle of hydraulic transmission, the actuator structure of the hydraulic machine is simple, and the power equipment can be arranged separately, and it can work in multiple cylinders. The hydraulic pressure and the working area of the piston (or plunger) can be changed in a large range.
And because the hydraulic press is a static pressure equipment, it does not need a large foundation, so it can achieve a large tonnage.
At present, hydraulic presses are mostly used in all types of forming equipment that require larger pressing tonnage, and hydraulic presses are almost all over 100,000 KN.
The hydraulic plate rolling machine is more suitable for plates with a long width rolling. It is easy to get a large working stroke, which is convenient for pressing large-size work pieces, and can generate the rated maximum pressure at any position of the stroke, and can hold the pressure for a long time.
This feature of hydraulic press is very necessary for some processing techniques, such as deep drawing, extrusion, plastic molding, super-hard material synthesis, etc.