Three rolls plate rolling machines are widely used in metalworking industries for bending and forming metal sheets into cylindrical, conical, and arc-shaped components. They play a critical role in the production of pressure vessels, pipelines, boilers, storage tanks, and other large industrial components. They are designed to handle various types of materials, including carbon steel, stainless steel, and aluminum alloys, under different working conditions.
But what are the general types of three rolls plate metal plate rolling machines?
Three rolls plate rolling machines are classified into different types based on their structural design and operating principles. Understanding the different types helps manufacturers select the most suitable model for specific production needs. The main types of three roll plate rolling machines include:
Symmetrical Three Rolls Plate Rolling Machine
Symmetrical arrangement. The upper roller can move up and down, while the center distance of the lower roller remains fixed. Therefore, there is a straight section at both ends of the board, which is the remaining straight edge, with a length approximately equal to half of the center distance between the two lower rollers. Before bending cylindrical parts, professional equipment and molds are required to pre bend the ends of the sheet metal.
The structure of the hydraulic three rolls symmetrical plate rolling machine is a three roll symmetrical type. The upper roll moves vertically up and down at a symmetrical position in the center of the two lower rolls, which is obtained by the hydraulic oil in the hydraulic cylinder acting on the piston. It is a hydraulic transmission. The two lower rolls rotate, and the output gear of the reducer meshes with the lower roll gear to provide torque for the rolled sheet.
Asymmetric Three Rolls Plate Rolling Machine
The work roll is characterized by asymmetric configuration. The vertical plane formed by the axis of the lower work roll has a small offset distance relative to the vertical plane formed by the axis of the upper work roll, and the lower work roll can be vertically raised and lowered. The upper and lower work rolls are both active rolls, while the two side work rolls are passive rolls, and can be tilted and lifted along the guide rail surface at a certain angle relative to the vertical plane.
When working, the ends of the plate located before or after the clamping points of the upper and lower rollers are very short, and the remaining straight edges are generally only twice the nominal thickness of the rolled plate. It is almost possible to bend the entire plate end without the need for other pre bending methods. In addition, the degree of bending deformation allowed by each work roll is relatively large, resulting in high bending efficiency.
Three rolls asymmetric plate rolling machine (semi-automatic) has a structure of a three roll asymmetric upper roller as the main drive, and the lower roller moves vertically up and down to clamp the sheet. The lower roller gear meshes with the upper roller gear and serves as the main drive; The edge roller performs tilting and lifting motion, with dual functions of pre bending and coiling. Compact structure, easy to operate and maintain.
Level Down Adjust Three Rolls Plate Rolling Machine
The vertical downward adjustment and inclined downward adjustment three rolls plate metal plate rolling machines are similar in type. The upper roller rotates fixedly, but the motion trajectories of the two lower rollers are different, one is vertical motion and the other is inclined motion.
The curved downward adjustment three rolls plate metal plate rolling machine is a new type of development that combines vertical downward adjustment and inclined downward adjustment. The upper roller is fixed for rotation only.
The upper roller of the horizontally adjustable three roll plate metal plate rolling machine can move up and down, and the two lower rollers can move horizontally separately or simultaneously. All three working rollers are active rollers. The adjustable stroke of the two lower rollers is relatively large. During the bending process, each lower roller takes turns to perform the functions of the lower roller and the side roller, forming two types of asymmetric three roller plate bending machines. With one loading and unloading of the workpiece, all bending work, including the front and rear ends, can be completed.
This level down adjust three rolls plate rolling machine is used for rolling and calibrating cylindrical and conical bodies for boiler pressure vessels. It is suitable for rolling and post-weld calibration of cylindrical bodies for large, thick-walled pressure equipment and chemical pressure vessels. The upper roller can move vertically, while the two lower rollers can move horizontally independently.
Marine Plate Rolling Machine
The marine plate rolling machine adopts a three-roller symmetrical structure. The upper roller is positioned symmetrically between the two lower rollers and performs vertical lifting motion, which is achieved through hydraulic transmission by the action of hydraulic oil in the hydraulic cylinder acting on the piston rod. The two lower rollers rotate through the engagement of the output gear of the reducer with the gears of the lower rollers, providing torque for rolling the plate.
Multiple sets of supporting rollers are installed below the two lower rollers to enhance the rigidity of the lower rollers and can be vertically adjusted. A rigid beam is installed above the upper roller, with multiple sets of supporting rollers between the beam and the upper roller to increase the rigidity of the upper roller. This marine plate rolling machine is suitable for rolling ultra-wide arc-shaped parts.
Trailer Plate Rolling Machine
The upper roller of this machine can move vertically and horizontally. Vertical lifting is achieved through hydraulic transmission by the action of hydraulic oil in the hydraulic cylinder acting on the piston rod. Horizontal movement is achieved through a worm gearbox, worm gear, and screw nut mechanism, which transmits torque to drive the horizontal movement of the upper roller. The lower roller only rotates to provide torque for rolling the plate. Supporting rollers are installed below the lower roller and can be adjusted. The upper roller has a drum-shaped design, which improves the straightness of the product. Trailer plate rolling machine is suitable for rolling tank bodies of various cross-sectional shapes for trailers.
Large Hydraulic Three Rolls Plate Rolling Machine
Large hydraulic three rolls plate rolling machine belongs to the hydraulic three roll plate rolling machine, which is used to load various containers of carbon steel and low-alloy steel at room temperature without turning around, and complete the processes of pre bending, rounding, and straightening the plate ends. The upper roller can move vertically or horizontally. Pre bending is achieved by horizontally moving the upper roller to an asymmetric position relative to the lower roller.
When rolling, the two lower rollers are driven by an electric motor and a reducer. Due to the unchanged elevation of the lower roller, it is convenient for feeding and operation. Provide detailed electrical schematics, strictly follow the drawings for electrical wiring, and ensure that the numbers on both ends of each wire are clear and complete. The wire terminal block should be labeled with the same wire number as the wire, and corresponding markings should be made on the electrical wiring diagram and schematic.
The electrical components used in the equipment are all high-quality products from well-known enterprises. Electrical protection devices (such as current relays, air switches, etc.) undergo strict testing before installation to ensure reliable operation.
Large hydraulic three rolls plate rolling machine runs smoothly, controls flexibly, has no jamming, oil leakage, and abnormal noise.The paint surface is smooth and shiny, the paint mold thickness is uniform, and there are no defects such as flow marks or missed spraying.The tipping frame adopts hydraulic tipping, which has a fast speed.The vertical displacement of the upper roller is driven by hydraulic transmission, while the horizontal movement is driven by mechanical transmission with faster speed resulting in high reliability and low failure rate.
Nanjing Primapress Machinery Equipment Co., Ltd. specializes in the production of various types of fully automatic four roll bending machines, hydraulic three roll bending machines, and CNC two roll bending machines. We welcome new and old customers to come and consult!
