This machine is a four-roller plate rolling marvel, featuring a top roller that stands as the central force driving its operations. It is the main driver, orchestrating rotational movement. The lower roller moves up and down, ingeniously allowing the plate to achieve friction along its length. Meanwhile, the two side rollers perform an angular up-down motion relative to the straight line, imparting the necessary plastic deformation to the steel plate. By adjusting the side rollers, it can accomplish both symmetrical and asymmetrical bending. The flat end is theoretically minimized, offering a significant advantage over the three-roller machines by eliminating the need for a pre-bending procedure and device. This mechanism is adept at preliminary leveling of steel plates, making it an invaluable asset across industries such as petroleum, chemical production, boilers, shipbuilding, hydroelectricity, and beyond.
Machine construction:
The robust structure of this machine is meticulously crafted with an upper roller device, a driving device, a lower roller devicee, a side roller device, a hydraulic drop end feature, a lubrication system, and a left and right frame, all resting on a sturdy chassis.
(body frame drawing)
top roller and driving device
The Top roller device is an assembly of top roller, hydraulic drop end, fixed bearing, hydraulic motor, and bearing.
The top roller draws its torque through the connection of a hydraulic motor, propelling itself into rotational motion. The hydraulic drop end is fortified with a protective steel bushing.
rotation movement. This hydraulic drop end comes equipped with a protective steel bushing for additional security.
lower roller and position inspection device
The lower roller assembly includes a lower roller, an oil cylinder, a bearing for the lower roller, and a self-aligning bearing.
On both sides, the sliding bearing block supports the lower roller, harmonizing with the frame's guide rail. Positioned atop two oil cylinders, the hydraulic system provides the power for the lower roller's vertical movement. The main oil cylinder endures a rated pressure of 16Mpa, with up-down movement precisely monitored by sensors attached to the lower roller and frame, and displayed on an LCD. The hydraulic system's pressure is adjustable, ensuring the appropriate rolling power is easily attained.
(hydraulic drivers drawing)
side roller device
The side roller device includes a main oil cylinder, self-aligning bearing, and a bearing.
The bearing blocks support the side rollers, each side working in concert with the frame's guide rails.
The side roller drives its bearing blocks to move vertically through four strategically placed oil cylinders within two frames. The precise up-down travel of the side rollers is captured by sensors on both the side roller and frame, with real-time data displayed on an LCD screen.
For rolling cone shapes, self-aligning bearings are utilized for both the side and lower rollers. When the lower roller maintains a level position, and when the horizontal line transitions into a slope, fine adjustments ensure that the lower and side rollers press tightly. A degree of inclination exists between these components.
3-4, hydraulic drop end
The hydraulic drop end device encompasses an oil cylinder, joint, bearing block, oil cylinder bearing, and more.
The hydraulic drop end device facilitates easy removal of the product along the roller shaft.
Once the hydraulic drop end completes its closing or opening cycle, the oil cylinder's stroke returns to zero. Its power source is a robust hydraulic station.
Balance device
The balance device features a compact design, ensuring optimal performance when the tipping rack disengages from the top roller's bearing face and initiates a tipping motion. As gravity causes the top roller to descend, the balance device maintains its level positioning. This device is strategically mounted on the fixed side—separated by a small gap from the fixed frame—and is securely fastened with screws, providing unwavering stability.
(plate rolling drawing)
Hydraulic System
The hydraulic system is an intricate arrangement composed of a gear pump, a valve group, and auxiliary pipelines, all working in unison to power the mechanism.
The hydraulic valve incorporates the Yuken superposition hydraulic valve series, ensuring fail-safe layout
that is not only straightforward but also minimizes leakage, making maintenance a breeze.
This system is architecturally divided into three functional loops: the pressure adjusting loop, synchronization loop, and speed loop.
Within the pressure adjusting loop, the system's working pressure is finely tuned via the main overflow valve, maintaining a robust operating pressure of 16Mpa.
The synchronization loop ingeniously synchronizes the up-and-down motion of the lower roller using a flow divider valve, while the throttle valve allows for meticulous speed adjustments, enhancing operational precision.
In the speed loop, frames are elegantly dropped, reset, and regulated using a throttle valve to harmonize the speed.
Electric Control System
Comprising an electric cabinet, operation control table, and portable button box, the electric control system is powered by a 380V/50Hz supply. The principal switch offers robust short circuit and overload protection for the main motor. AC contactors efficiently manage forward and reverse motor rotations, while the integration of PLC programmable control ensures a minimal relay count for enhanced stability and longevity. The control table is equipped with all necessary buttons and indicator lights to oversee the entire rolling process, providing seamless control over operations and status monitoring.
CNC System
Our NC system employs a rotation encoder, synergizing with a high-reliability industry controller to create a stable and efficient control environment.
CNC Function
CThe CNC system is designed for real-time monitoring and data transmission, with a power-off memory feature that safeguards against data loss during rolling operations.
The industrial control PLC automatically inspects the lower roller position and both ends of the side rollers, ensuring exceptional synchronization precision of ±0.15mm.
The programmable display provides real-time updates on the position of the lower roller and both ends of the side rollers, with customizable settings.
position and it can be set.
The displacement transducer boasts a resolution of 0.10mm, while display precision achieves an impressive ±0.10mm accuracy.
Automatic Self-Judge Function
Manufacturer of the Standard Parts
| NAME |
Manufacture |
| Bearings |
Type |
Double row aligning bearing
|
| Manufacture |
Wafangdian |
| Rollers |
Material |
42CrMo forging upper roller and 45# steel other rollers |
| Manufacture |
Nangang/Warwick Steel
|
| Body frame |
Material |
Q235A |
| Processing methods |
Welded structural parts, annealing stress - shot blasting, CNC boring and milling machine machining
|
| Manufacture |
Pully |
| Hydraulic driver |
Jieshite |
| Hydraulic motor |
Nantong tongde |
| Main electrical element |
SIEMENS |
| Hydraulic system |
Pump |
Type |
Gear pump |
| Manufacture |
Changyuan |
| Valve |
Manufacture |
YUKEN |
| cylinder |
Piston rod |
45 Forgings, Heat treatment HRC48-52
|
| Manufacture |
Nantong |
| Sealing |
Yx |
| Manufacture |
NOK/dingji |
Electric system
|
|
digital control system |
| Hydraulic motor |
Nantong tongde |
| Touch screen |
Haiwei 15.6' |
| PLC |
XINJE |
| Sensor |
Milante |
| Main electrical element |
SchneiderElectric/Siemens |
Audited Supplier 
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