Working Principle and Classification of Plate Bending Machine


Working principle:

The upper roller of the symmetrical plate rolling machine is at the symmetrical position of the two lower rollers through the hydraulic oil in the hydraulic cylinder to act on the piston for vertical lifting movement, and the final gear of the main reducer drives the gears of the two lower rollers to mesh for rotating motion, which is the rolling motion Provide torque. The flat plastic metal plate of the plate rolling machine passes between the three working rolls of the plate rolling machine. With the help of the pressing of the upper roller and the rotation of the lower roller, the metal plate is continuously bent through multiple passes, resulting in permanent plastic deformation. Roll into the required cylinder cone or part of them. The disadvantage of this hydraulic three-roller bending machine is that the end of the plate needs to be pre-bent with the help of other equipment.This rolling machine is suitable for large rolling machines with a thickness of more than 5Omm. A row of fixed idlers is added under the two lower rollers to shorten the span of the two lower rollers, thereby improving the precision of the rolled workpiece and the overall performance of the machine.


Because of the different fields of use, the types of bending machines are also different. From the number of rolls, it is divided into three-roller and four-roller. The three-roller is divided into a symmetrical three-roller bending machine, a horizontal downward-adjusting three-roller bending machine, an arc downward-adjusting plate bending machine, an upper roller universal three-roller bending machine, and a hydraulic CNC bending machine. From the transmission point of the mechanical type and hydraulic type.In terms of the development of plate bending machines, the upper roll universal type is the most backward, the horizontal down adjustment type is slightly advanced, and the arc down adjustment type is the most advanced.

Three-roller bending machine:

1.The mechanical three-roller bending machine is divided into symmetrical and asymmetrical.
Mechanical three-roller symmetry
Performance characteristics of mechanical three-roller symmetrical plate bending machine: The structure of the machine is three-roller symmetrical.The upper roller moves vertically at the center symmetrical position of the two lower rollers. t is obtained by the transmission of the screw nut and the worm. Rotational motion, through the output gear of the reducer meshing with the lower your gear, provides torque for the rolled sheet. The disadvantage of this machine is that the end of the plate needs to be pre-bent with other equipment.
Mechanical three-roll asymmetrical
The main features of the mechanical three-roll asymmetrical plate bending machine: the structure of the machine is a three-roll asymmetrical type, the upper roller is the main drive, and the lower roller moves vertically to clamp the plate and mesh with the upper roller gear through the lower roller gear, At the same time as the main drive; the side rollers are tilted and lifted, with dual functions of pre-bending and rounding Compact structure, convenient operation, and maintenance.
The main features of the hydraulic three-roller symmetrical plate bending machine: the upper roller of the machine can be vertically raised and lowered, and the verticality hydraulic transmission is obtained by the hydraulic oil in the hydraulic cylinder acting on the piston rod the lower roller is driven in rotation, and the output gear meshes through the reducer. To provide torque for the coil there is an idler under the lower roller, which can be adjusted. The upper roller is in the shape of a drum, which improves the straightness of the product and is suitable for ultra-long tanks with various cross-sectional shapes.
lt is an upward-adjusting symmetrical three-roller plate rolling machine, which can roll metal sheets into circular,arc-shaped, and conical workpieces within a certain range. The two lower rollers of this model are the driving rollers and the upper roller is the driven roller. It is widely used in shipbuilding, boiler, aviation, hydropower, chemical, metal structure, and machinery manufacturing industries.
it is suitable for the bending deformation of metal plates. It can roll around, arc and tapered workpieces within a certain range, and has the function of pre-bending the end of the plate. The two lower colors of this model are active rollers that can move horizontally. The roller is a driven roller that can move up and down. There are mechanical and hydraulic movement modes. The driveshafts are all connected by universal couplings.