The plate rolling machine is a shaping machine for continuous point bending of plates. It has the function of rolling O-shaped, U-shaped, multi-segment R and other shapes of plates. 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 acting 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 rotational movement. The rolled sheet provides torque. The flat plastic metal plate of the bending machine passes between the three work rolls (two lower rolls and one upper roll) of the bending machine. With the help of the lower pressure of the upper roll and the rotation of the lower roll, the metal plate passes through multiple passes. Continuous bending (the inner layer is compressed and deformed, the middle layer is unchanged, and the outer layer is stretched and deformed) to produce permanent plastic deformation and roll into the required cylinder, cone or part of them. The disadvantage of this hydraulic three-roller plate bending machine is that the end of the plate needs to be pre-bent with other equipment. It is more suitable for large-scale plate bending machines with a plate thickness of 50mm or more. A row of fixed rollers is added under the two lower rollers to shorten two The span of the lower roll improves the precision of the rolled workpiece and the overall performance of the machine.
working principle
Due to the different fields of use, the types of bending machines are also different. From the number of rollers, it is divided into three-roller and four-roller. Among them, the three-roller rolling machine is divided into symmetrical three-roller bending machine,horizontal downward-adjusting three-roller roll bending machine, arc-downward-adjusting plate bending machine, upper roller universal three-roller bending machine and hydraulic CNC rolling machine. 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 has mechanical and hydraulic type, among which mechanical three-roller bending machine is divided into symmetrical and asymmetrical.
Performance characteristics of the three-roller mechanical symmetrical plate rolling machine: the machine structure is three-roller symmetrical. The upper roller moves vertically at the center symmetrical position of the two lower rollers. It is obtained through the transmission of the screw and screw nut and the two lower rollers rotate. Movement, the output gear of the reducer meshes with the lower roller gear to provide 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.
The main features of the three-roller mechanical asymmetrical plate bending machine: the machine structure is a three-roller 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, it serves as the main drive; the side rollers are tilted and lifted and have dual functions of pre-bending and rounding. Compact structure, convenient operation and maintenance.
The main features of the three-roller hydraulic symmetrical plate bending machine: the upper roller of the machine 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 by rotation and is meshed by the output gear of 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.
The up-adjusting symmetrical three-roller plate rolling machine 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 round, arc and tapered workpieces within a certain range, and has the function of pre-bending the end of the plate. The two lower rollers of this model are active rollers and can move horizontally. The roller is a driven roller that can move up and down. There are mechanical and hydraulic types of movement. The drive shafts are all connected by universal couplings.
