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 a very important 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 formed by bending. 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.
Due to the different fields of use, the plate bending machine is also different. From the number of rollers, it is divided into three-roller rolling machine and four-roller rolling machine. 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, there are 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.
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 sheet 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 asymmetrical 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 characteristics 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 rod 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, and is suitable for cans of various cross-sectional shapes with ultra-long specifications.
It is an upward-adjusting symmetrical three-roll plate rolling machine, which can roll metal sheet into 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 bending and 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 that can be moved horizontally. The rollers are driven rollers that can move up and down, and the moving methods are mechanical and hydraulic. The transmission shafts are connected by universal couplings.
Here we focus on the four-roller rolling machine, which is suitable for the bending and forming of metal sheet materials. It can roll round, arc and conical workpieces within a certain range, and has pre-bending at the end of the sheet metal. Function, small remaining straight edges, high working efficiency, and can be used to roughly level the metal plate on the machine.
The position of the upper roller is fixed, and the lower roller moves straight up to clamp the steel plate. The straight lines or arcs on both sides of the rollers move up to the upper rollers to adjust the radius of curvature of the drum. The four-roller and three-roller plate rolling machines have different roller movement forms, but the working principles are the same. They use the principle of three-point circle to roll different radius. But the straight edge of pre-bending and roundness of four-roller bending machine are better than that of three-roller.