Introducing our state-of-the-art four-roller plate rolling machine, designed with precision and efficiency at its core–the top roller. serves as the primary driving force, providing essential rotation movement. The lower roller executes an up-and-down motion, facilitating frictional interaction along the plate's length. The two side rollers, with their angled up-and-down movement, induce the necessary plastic deformation of the steel plate. By adjusting the side rollers, both symmetric and asymmetric bending can be achieved. The theoretical flat end produced by this machine is exceptionally short compared to traditional three-roller machines, thereby eliminating the need for pre-bending procedures and devices. Moreover, it offers the advantage of rough leveling of steel plates. This robust and versatile machine finds extensive applications across various industries, including petroleum, chemical, boiler, shipbuilding, hydroelectricity, metal structure, and machinery.
Machine construction:
At the heart of this machine lies a sophisticated structure, which comprises the upper roller device and the driving mechanism, a robust lower roller device, an innovative side roller assembly, a hydraulic drop end mechanism, a lubrication system, and both left and right frames, all mounted upon a sturdy chassis.
(body frame illustration)
top roller and driving device
The top roller assembly incorporates a hydraulic drop end, fixed bearing, hydraulic motor, and bearing.
This top roller receives torque via a seamless connection with the hydraulic motor, enabling smooth rotation.
Additionally, the hydraulic drop end features a protective steel bushing, ensuring longevity and reliability.
lower roller and position inspection device
The lower roller assembly includes an oil cylinder, a robust roller bearing, and a self-aligning bearing.
The sliding bearing block, supporting the lower roller, aligns perfectly with the frame guide rail. It is secured upon two oil cylinders that receive power from the hydraulic system, enabling precise up-and-down motion. With a rated pressure of 16Mpa for the main oil cylinder, the system's pressure can be freely adjusted to achieve the desired rolling power. The up-and-down motion is monitored by sensors installed on the lower roller and frame, with real-time data displayed on the LCD.
(hydraulic drivers illustration)
side roller device
Engineered meticulously, the side roller device consists of a primary oil cylinder, a self-aligning bearing, and a supporting bearing.
The bearing block provides steadfast support to the side roller and coordinates seamlessly with the frame guide rail on both sides.
The side roller's up-and-down motion is powered by four oil cylinders housed within the two frames, with the movement accurately measured by sensors and displayed digitally on the LCD.
For crafting cone-shaped rolls, self-aligning bearings are utilized in both the side and lower rollers. When aligned horizontally, or adjusted to a slope, these rollers ensure a tight closure through fine tuning, achieving the required angle between the horizontal plane and the rollers.
3-4, hydraulic drop end
The hydraulic drop end system comprises an oil cylinder, joint, bearing block, and supporting bearing.
The hydraulic drop end apparatus facilitates seamless removal of the finished product along the roller shaft, enhancing operational efficiency.
Upon the hydraulic drop's completion of opening or closing, the oil cylinder's stroke resets to zero, optimizing system readiness. This mechanism draws its power from a dedicated hydraulic station, ensuring consistent performance.
Balance device
The balance device boasts a compact, efficient design. As the tipping rack slips off the bearing face of the top roller and initiates a tipping motion, the top roller's end may lower under gravity's influence. To maintain the roller's level alignment, an advanced balance device is strategically installed on the fixed side, positioned at a calculated distance from the fixed frame. It is securely fastened to the frame with screws, ensuring robust stability and precision.
(plate rolling drawing)
Hydraulic System
The Hydraulic System is intricately designed, incorporating a gear pump, a precision-engineered valve group, and auxiliary pipelines, creating a harmonious, efficient operation.
Our system utilizes the Yuken superposition hydraulic valve series, providing unparalleled reliability in hydraulic operations. The layout
is intelligently engineered for simplicity, minimizing leakage and ensuring effortless maintenance, enhancing overall operational efficiency.
The system is architected into three pivotal loops: the pressure adjusting loop, synchronization loop, and speed loop, each contributing to a seamless operation.
The pressure adjusting loop precisely modulates the system's working pressure with the main overflow valve, maintaining an optimal working pressure of 16Mpa.
The synchronization loop facilitates the simultaneous adjustment of the lower roller's elevation through a flow divider and throttle valve, allowing fine speed adjustments for precision control.
The speed loop efficiently manages the frame's descent and reset, with speed refinement achieved via the throttle valve, ensuring smooth operation.
Electric Control System
Our Electric Control System comprises an electric cabinet, an operation control table, and a portable button box, operating on a 380V/50Hz power supply. Equipped with a main switch offering short circuit and overload protection, the system's AC contactor governs forward and reverse operations. The integration of PLC programmable control minimizes reliance on relays, promoting stability and extending operational longevity. A well-structured control table houses all necessary buttons and indicators, enabling complete oversight of the rolling process and real-time status monitoring.
CNC System
Featuring a rotation encoder, the NC System pairs with a high-reliability industrial controller to establish a control system renowned for its stability and exceptional performance.
CNC Function
CWith real-time monitoring, seamless data transmission, and power-off memory, the NC System ensures uninterrupted precision throughout the rolling process.
An Industry Control PLC meticulously monitors the lower roller and side roller positions, achieving synchronization precision to ±0.15mm.
The programmable display provides real-time data on the lower roller position and both ends of the side roller, allowing precise settings to be applied.
position and it can be set.
Offering a displacement transducer resolution of 0.10mm with a display precision of ±0.10mm, it guarantees unmatched 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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