The upper roll of the four roll plate bending machine is the driving roll, the lower roll and the side roll are the driven roll, the upper roll position is fixed, the lower roll and the side roll can be moved up and down, the upper roll is driven by the hydraulic motor, and the rotation of the lower roll and the side roll is driven by the friction between the steel plate and each roll. The lower roll and side roll of the four roll plate bending machine are driven by oil cylinders at both ends to realize lifting movement. The overturning and resetting of the bearing body at the front of the upper roll is carried out by the overturning oil cylinder. Each roll bearing body and oil cylinder are installed in the racks at the left and right ends.

The left and right frames of the four roll plate bending machine are the main body of the four roll plate bending machine, which are welded and installed on the overall base. The pushing device is used to roll the workpiece, turn over the oil cylinder and push the workpiece out of the machine; All operations of the machine are carried out on the console.

1. The upper and lower rollers of the four roll plate bending machine can clamp the steel plate to prevent it from slipping when bending.

2. The side roll can play a positioning role, and can align the steel plate during feeding. It is convenient for bending conical parts, elliptical parts and profiling processing.

3. The steel plate can not turn around during pre bending and rolling of the four roll plate bending machine.

1.Precautions for the use of four roll plate bending machine:

In case of abnormal noise, impact, vibration, electric leakage and high temperature (>60 ℃) of hydraulic oil, motor and bearing of the plate rolling machine, stop the machine immediately for inspection and treatment.

2.When checking the roundness with the sample plate, it must be carried out after the plate rolling machine stops.

3.It is strictly forbidden to lap and overload the steel plate when it is rolled. The operator of the plate rolling machine must stand on both sides of the rolled steel plate. No one is allowed to stand in front of and behind the plate rolling machine (the effective working face of the upper roll). No one is allowed to stand on the plate during rolling to prevent the steel plate from stretching out or falling down and hurting people.

4. The specification of rolled plates shall not exceed the range specified in the equipment operation manual and capacity curve. It is not allowed to adjust the pressure of the upper roll at will. The operator must pay attention to the operation.

5. All rolled plates must be placed in the center of the roll shaft for rolling. Slipping is not allowed during coiling.

6. During the process of steel plate rolling and pressing, the operator must always observe the operation of the plate, and the plate shall not roll off. When the length reaches the end, and the symmetrical rolling exceeds the radius, the operation site in the opening direction is not allowed to enter.

7. When the overturning rack overturns, it must be confirmed that the horizontal direction of the upper roll is in the middle position, and it can only be overturned when the vertical direction is at the highest point. When the upper and lower rolls contact, the upper roll cannot be moved horizontally.

8. When the cylinder is preliminarily welded on the plate rolling machine, the ground wire of the welding machine must be in good contact with the cylinder before welding.