The mechanical working principle of plate rolling machine: rotating the drum through the drive driving, using friction between drum and iron plate to drive the other two drums rotation, therefore, the plate rolling machine roll the iron plate into cylindric. The thickness and diameter of the workpiece can be adjusted by changing the distance between the upper and lower rollers through two adjusting screws on the bracket. Electric working principle, using positive and reverse control circuit, the main circuit using short circuit protection and overheating protection, this device is mainly composed of six parts: motor, reducer, 3 rollers of 108 diameter, two adjusting screws and bracket.
The reducer part of the plate rolling machine adopts two stage reduction gear which worm gear, worm and spur gear work together, the base and support all adopt channel steel to be welded together, the upper rollers are connected with the bracket by adjusting screw and the lower roller is connected with the base by the roller seat, belt driving is the driving type that tighten the ring belt on the driving wheel and slave wheel. The plate rolling machine has been widely used due to its wide range of center distance changes, simple structure, smooth transmission, buffering and low manufacturing cost.
There are many different kinds of plate bending machines, three-roll plate bending machine, four-roll plate bending machine, wind tower bending machine and so on. The plate rolling machine is the forging machine that is used to bend metal sheet metal, it is one of the key equipment for boiler, shipbuilding, petrochemical, metal structure, cement machinery, chemical machinery, machinery manufacturing and maintenance departments. The plate rolling capacity of the plate rolling machine has been improved continually, therefore, the design requirements of the plate rolling machine is also improved continually in the projects. As the main bearing member of the load, the frame of plate rolling machine is one of the main parts of the design due to its complex stress.
1. The operators must read the manual of this metal fabrication equipment carefully, according to the operation procedures to operate strictly, it is prohibited to run the machine with problems and perate unprofessionally.
2. Check the running state of the plate rolling machine regularly. Only when it meets the the operation conditions, the operators who are qualified to hold the working certificate of the plate rolling machine can operate the machine.
3. When the overturned stand is completely reset (the overturned reset indicator on the operating table is on) and the balance cylinder has risen to the highest point, it is allowed to operate the plate rolling machine upper roller lifting, lower roller positive and negative rotation and roller lifting operation.
4. No foreign matter should be stuck between the idler and the lower roller, such as welding electrode head and small steel plate, so as not to damage the idler and the lower roller, etc.
5. Remove the oxide scale on the chassis and roller device regularly, do not damage the travel switch, rotary encoder and its connecting wire when cleaning the oxide scale, check the meshing condition of rotary encoder regularly.
6. Check the tightness of the bolts of the plate rolling machine regularly and tighten them in time.
7. Lubricate all lubrication points and lubrication parts regularly.
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, which is the rolling motion provide torque. The flat plastic metal plate of the bending machine passes between the three working 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 is passed 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 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 50mm. A row of fixed idlers is added under the two lower rollers to shorten the span between the two lower rollers, thereby improving the precision of the rolled workpiece and the overall performance of the machine.
The automatic feeding equipment of the rolling machine is mainly composed of a sheet trolley, an actuator, a sheet transfer mechanism, and an auxiliary mechanism. The sheet trolley is used to place the sheets to be rolled. The main function of the actuator is to transport the plate to be rolled on the plate trolley to the feeding platform. The plate handling operation is mainly applied to the rectangular coordinate manipulator and the vacuum suction cup picking device. In industrial automation systems, it is often necessary to pick up and transport workpieces, and vacuum suction cups are widely used as suction cup manipulators.
The transmission methods of Cartesian coordinate manipulators mainly include mechanical transmission (rack and pinion transmission, synchronous belt transmission, ball screw transmission), linear motor transmission, and pneumatic transmission. The sheet material transfer mechanism is mainly used to transfer the sheet to be rolled, and there are common roller shaft transfers and universal ball transfer. The main function of the auxiliary mechanism is to improve the precision of sheet rolling. Common auxiliary mechanisms include a sheet center alignment device, push device, and displacement detection device.
Frame:
The frame of a rolling machine supports all other components and withstands the mechanical forces exerted during the rolling process. It is typically made of high-strength steel to ensure stability and durability. The robustness of the frame determines the machine's ability to handle heavy loads and maintain alignment and accuracy.
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Rolls:
&#;Number of Rolls: Rolling machines can be classified based on the number of rolls they contain, commonly two, three, or four. Each configuration serves different purposes:
&#;Two-roll machines: Simple bending and shaping, primarily used for creating cylindrical shapes.
&#;Three-roll machines: More versatility, capable of performing both symmetrical and asymmetrical bending. They are common in plate bending.
&#;Four-roll machines: Offer the best control for precision bending, allowing for easier feeding of material and the capability to roll tighter diameters.
&#;Material and Hardness: Rolls are made from hardened steel or sometimes coated with other materials to resist wear and corrosion.
Drive System
Rolling machines can be mechanically, hydraulically, or electrically driven. The choice depends on the required precision, speed, and power:
&#;Mechanical drives are typically used for lighter applications.
&#;Hydraulic drives offer more power and precise control, suitable for heavy-duty rolling.
&#;Electric drives provide efficiency and can be easily automated.
Adjustment Mechanism
For three and four-roll machines, the adjustment of the side rolls and the pinch roll is crucial for controlling the bending process and achieving the desired curvature. These adjustments can be manual, motorized, or hydraulic, influencing both the machine's ease of use and the precision of the final product.
Control System
Modern rolling machines incorporate advanced control systems, including computer numerical control (CNC), to enhance precision, repeatability, and automation. CNC systems can control the movement of rolls, manage rolling speed, and adjust positions based on the input parameters.
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