Introducing a marvel of engineering: the Four-Roller Plate Rolling Machine by Pully Intelligent Equipment Co., Ltd. This machine features a top roller as the main driving force. It serves as the heart of the operation. The main drive conducts rotational movements while the lower roller engages in an up-and-down motion, facilitating friction along the length of the plate. This dynamic interaction is complemented by the two side rollers, which move at an angle to the straight line, delicately coaxing the steel plate into the desired plastic deformation. By adjusting these side rollers, both symmetric and asymmetric bending can be achieved, resulting in exceptionally short flat ends. In contrast to traditional three-roller machines, this innovation eliminates the need for pre-bending processes and devices, offering a rough leveling for steel plates. This machine finds its extensive application across diverse industries, including petroleum, chemical, boiler, shipbuilding, hydroelectricity, metal structure, and machinery industries.
Machine construction highlights:
The robust structure of this machine is ingeniously designed with key components like the upper roller device, driving device, lower roller device,side roller device, hydraulic drop end device, efficient lubrication system, left and right frame, and a sturdy chassis, among others.
(See the body frame drawing for more clarity)
Top roller and driving device details:
The top roller device is a sophisticated assembly comprising the top roller itself, a hydraulic drop end, fixed bearing, hydraulic motor, and precision bearing.
The top roller transmits torque via a connected hydraulic motor, enabling a
smooth rotational movement. The hydraulic drop end is securely encased with a protective steel bushing to ensure durability.
Lower roller and position inspection device explained:
The lower roller device integrates lower roller components, an oil cylinder, roller bearings, and a self-aligning bearing mechanism.
The sliding bearing block on either side, supporting the lower roller, aligns with the frame guide rail. It is anchored to two oil cylinders at the base, powered by a hydraulic system enabling vertical movement of the lower roller. The main oil cylinder operates at a pressure of 16Mpa. Sensors meticulously inspect the vertical distance of the lower roller, with results displayed on an intuitive LCD screen. The hydraulic system's pressure is easily adjustable, providing precise hydraulic power tailored to rolling requirements.
(Refer to hydraulic drivers drawing for visualization)
Side roller device essentials:
This component is engineered with a main oil cylinder for the side roller, a self-aligning bearing, and supporting bearings.
The bearing block supports the side roller, ensuring alignment with the frame guide rail on both sides.
Through four strategically placed oil cylinders inside the frames, the side roller bearing block achieves precise vertical movement, monitored by sensors and displayed on an LCD.
For conical rolling, self-aligning bearings are employed for both side and lower rollers. These allow for tight closure when adjusted, maintaining a slope inclination with the horizontal line, thus refining the rolling process.
3-4, Hydraulic drop end details:
Crafted with precision, the hydraulic drop end device comprises an oil cylinder, joint components, bearing block, and oil cylinder bearing, among others.
The hydraulic drop end device seamlessly facilitates product removal along the roller shaft.
Upon completion of hydraulic drop actions, the cylinder stroke resets to zero, ensuring energy efficiency. The system's power is derived from a reliable hydraulic station.
Balance device insight: Meticulously designed for optimal equilibrium, enhancing the machine's overall performance.
The balance device boasts a compact and efficient structure. When the tipping rack slips off the bearing face of the top roller, initiating a tipping motion, gravity causes the top roller to descend. To ensure it remains perfectly level, a balance device is meticulously installed on the fixed side. Positioned outside the fixed side frame, there is a strategic distance maintained between the fixed frame and the balance device, which is securely attached to the frame with screws.
(plate rolling drawing)
Hydraulic System
Our hydraulic system is a sophisticated composition of a gear pump, a meticulously engineered valve group, and supportive assistant pipelines, all designed for peak performance.
The hydraulic valve features the advanced Yuken superposition hydraulic valve series. The pipeline lay out
is notably simple, ensuring minimal leakage and facilitating easy maintenance.
The system is ingeniously composed of three distinct loops: the pressure adjusting loop, the synchronization loop, and the speed loop.
In the pressure adjusting loop, the system's working pressure is finely tuned through the main overflow valve, maintaining a consistent pressure of 16Mpa.
The synchronization loop expertly adjusts the lower roller's elevation in tandem through a flow divider and throttle valve, allowing for precision speed adjustments.
The speed loop efficiently controls the frame's descent and reset operations, with speed adjustments handled through the throttle valve.
Electric Control System
The electric control system integrates an electric cabinet, an operation control table, and a portable button box. Powered at 380V/50Hz, it features a main switch with short circuit and overload protection for the main motor. Rotation directions are managed via an AC contactor, while the machine employs a PLC programmable control system. This design minimizes relay usage, enhances stability, and extends working life. Control table buttons and indicator lights oversee the entire rolling process, managing operations and statuses seamlessly.
CNC System
Our NC system utilizes a rotation encoder paired with a high-reliability industrial controller, establishing a control system renowned for its stable performance.
CNC Function
CThe NC system offers real-time monitoring, data transfer, and power-off memory throughout the rolling process.
An industry control PLC automatically inspects both the lower position and the side rollers' endpoints, ensuring synchronization precision to within ±0.15mm.
The programmable display dynamically shows the real-time positions of the lower roller and the two ends of the side roller,
which can be precisely set according to requirements.
The displacement transducer provides a resolution of 0.10mm, with a display precision of ±0.10mm.
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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