The plate rolling machine is a kind of equipment that uses work rolls to bend and form the sheet metal. It can form parts of different shapes such as cylindrical parts and conical parts. It is a very important processing equipment. The application fields of the plate rolling machine are very wide, especially in chemical machinery, manufacturing, shipping industry, etc., so the plate rolling machine can expand the application field and enter other industries so as to expand the market. Professional technology in machine manufacturing and machine work Personnel have made a favorable guarantee for its development.
Plate rolling machines can be divided into three-roll plate rolling machines and four-roll plate rolling machines. The three-roll plate rolling machine can be divided into two types: symmetrical type and asymmetrical type.
Next, the editor will explain to you the analysis of the working principle of the three-roll plate rolling machine:
The working principle of the plate rolling machine is a cross-sectional view of the rollers of the symmetrical three-roller plate rolling machine. The rollers have a certain length along the axial direction so that the entire width of the plate is bent.
There is an upper roller i at the symmetrical position in the middle of the two lower rollers, and the upper roller can be adjusted in the vertical direction, so that the sheet 4 placed between the upper and lower rollers can obtain different bending radii. The lower roller is active and installed in a fixed bearing, and the motor rotates in the same direction and at the same speed through a gear reducer. The upper roller is passive and installed in a bearing that can move up and down. The adjustment of the upper roll of the large plate rolling machine is mechanical or hydraulic, and the adjustment of the small plate rolling machine is often manual.
When working, the sheet is placed between the upper and lower rollers, and the upper roller is pressed down to make the sheet bend between the support points. When the two lower rollers rotate, the sheet moves due to the friction force, so that the entire sheet is evenly bent. .
According to the above bending principle, it can be known that only when the part of the sheet material is in contact with the upper roller, the required bending radius can be reached. Therefore, there is a section of length at each end edge of the sheet material that does not touch the upper roller and does not bend, which is called The remaining straight edge is about half the distance between the two lower rollers.
The cross-sectional view of the rollers of the asymmetric three-roller plate bending machine, the upper roller 1 is located on the top of the lower roller 2, and the other roller 3 is on the side, called the side roller. The upper and lower rollers are rotated by the same motor. The lower roller can be adjusted up and down, and the maximum adjustment distance is approximately equal to the maximum thickness of the steel plate that can be bent. The side rollers 3 are passive and can be adjusted in the direction of inclination.
When bending, send the sheet 4 to the upper and lower rollers, then adjust the lower roller to press the sheet tightly to generate a certain friction force, and then adjust the position of the side rollers, when the upper and lower rollers are rotated by the motor, the sheet will bend .
The advantage of this asymmetrical three-roller plate rolling machine is that the edges of both ends of the plate can also be bent, and the length of the remaining straight edge is much smaller than that of the symmetrical three-roller plate rolling machine, and its value is less than twice the thickness of the plate. Although the sheet between the side rolls and the lower roll cannot be bent, the entire bending process can be completed as long as the sheet is taken out from the plate rolling machine and turned around to bend.
