What is Plat Bending Machine ?

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The plate bending machine is a device that uses work rolls to bend and shape the sheet metal. It can form parts of different shapes such as cylindrical parts and tapered parts. It is very important for processing equipment. The working principle of the plate bending machine is to make the work roll move by the action of external forces such as hydraulic pressure and mechanical force so that the plate is bent or rolled into shape. According to the rotational movement and position change of work rolls of different shapes, elliptical parts, arc parts, cylindrical parts, and other parts can be processed.

Working Principle

 

The upper roller of the symmetrical plate rolling machine acts on the piston in the symmetrical position of the center of the two lower rollers through the hydraulic oil in the hydraulic cylinder to move vertically, and the final gear of the main reducer drives the gears of the two lower rollers to engage for rotational movement to roll the plate. Provide torque. The flat plastic metal plate of the plate rolling machine passes between the three work rolls (two lower rolls and one upper roll) of the plate rolling machine, and the metal plate passes through multiple passes by the lower pressure of the upper roll and the rotational movement of the lower roll Continuous bending (the inner layer is compressed and deformed, the middle layer is unchanged, and the outer layer is stretched and deformed), resulting in permanent plastic deformation, rolled into the required cylinder, cone or part of them. The disadvantage of this hydraulic three-roller bending machine is that the end of the sheet needs to be pre-bent by other equipment. The plate rolling machine is suitable for large plate rolling machines with a plate thickness of more than 50mm. A row of fixed supporting rollers is added to the lower part of the two lower rollers to shorten the span of the two lower rollers, thereby improving the accuracy of the rolled workpiece and the overall performance of the machine.

Types

Due to the different fields of use, the plate bending machine is also different. It is divided into a three-roller rolling machine and four-roller rolling machine from the number of rollers. The three-roller is divided into a symmetrical three-roller plate rolling machine, a horizontal downward-adjusting three-roller plate-rolling machine, an arc downward-adjusting plate-rolling machine, an upper-roller universal three-roller plate-rolling machine, and a hydraulic numerical control plate-rolling machine. From the transmission, it is divided into the mechanical type and hydraulic type. In terms of the development of the plate rolling machine, the universal type of the upper roller is the most backward, the horizontal downward adjustment is slightly advanced, and the arc downward adjustment is the most advanced.
Three-roller plate rolling machine has 1. mechanical 2.hydraulic type
1. Mechanical three-roller rolling machine is divided into symmetric and asymmetric.

 

Mechanical three-roller symmetrical
Performance characteristics of mechanical three-roller symmetrical plate rolling machine: The structure of the machine is a three-roller symmetrical type. The upper roller is vertically moved at the symmetrical position of the center of the two lower rollers. Rotating motion, through 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 by other equipment.
Mechanical three-roller asymmetric
The main features of the mechanical three-roller asymmetric plate rolling machine: the structure of the machine is a three-roller asymmetric type, the upper roller is the main drive, and the lower roller is vertically moved 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 roller for tilting movement, with dual functions of pre-bending and rolling. Compact structure, easy operation and maintenance.
2. Hydraulic type

 

The main features of the hydraulic three-roller symmetrical plate rolling machine: the upper roller of the machine can be vertically lifted, and the hydraulic transmission of the vertical lift is obtained by the hydraulic oil in the hydraulic cylinder acting on the piston rod; the lower roller is driven by rotation, and the output gear of the reducer is engaged, Provides torque for the coil, the lower roller has a supporting roller and can be adjusted. The upper roller is in the shape of a drum, which improves the straightness of the product.
It is an upward-adjusting symmetrical three-roll plate rolling machine, which can roll metal plates into a circular, arc, and conical workpieces within a certain range. The two lower rollers of this machine are active rollers, and the upper rollers are driven rollers. It is widely used in shipbuilding, boiler, aviation, hydropower, chemical industry, metal structure, and machinery manufacturing industries.
It is suitable for the bending and 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 rollers of this model are active rollers that can move horizontally. The rollers are driven rollers that can move up and down, and the movement methods are mechanical and hydraulic. The transmission shafts are connected by universal couplings.

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