Discover the cutting-edge Professional Four Rollers Roll Machine for Hydraulic Steel Bending by Pully Intelligent Equipment Co., Ltd. This state-of-the-art four-roller plate rolling marvel features the top roller as the pivotal component, ensuring unparalleled precision in steel bending. It serves as the primary drive, executing rotational movements while the lower roller gracefully ascends and descends to guide the plate with meticulous precision. This process ensures that friction aligns perfectly lengthwise. The two side rollers, elegantly maneuvering up and down at an angle, delicately impart the desired plastic deformation to the steel plate. Thanks to its adjustable side roller, this innovative machine masterfully achieves both symmetric and asymmetrical bending. The result is a minimal flat end, a significant advantage over traditional three-roller machines, as it eliminates the requirement for pre-bending procedures and devices, while offering rough leveling of the steel plate. Its indispensable role spans across industries such as petroleum, chemical, boiler manufacturing, shipbuilding, hydroelectricity, metal structures, and machinery.
Machine construction:
The core structure of this sophisticated machine encompasses the upper roller device and driving unit, lower roller device, side roller apparatus, hydraulic drop end system, lubrication unit, left and right frames, chassis, and more.
(body frame drawing)
Top roller and driving assembly
The Top roller device includes the top roller, a hydraulic drop end, fixed bearing, hydraulic motor, and bearing.
The top roller transfers torque through its connected hydraulic motor, initiating smooth rotation. Fitted with a protective steel bushing, the hydraulic drop end system ensures robust protection.
movement. The hydraulic drop end comes equipped with a protective steel bushing.
Lower roller and position inspection unit
The lower roller device is comprised of the lower roller, oil cylinder, lower roller bearing, and a self-aligning bearing.
Each sliding bearing block, which supports the lower roller, aligns flawlessly with the frame guide rail. Mounted on two oil cylinders, the hydraulic system provides powerful up-down movement for the lower roller. Operating at a rated pressure of 16Mpa, the main oil cylinder ensures efficient performance. Sensors meticulously track the up-down distance, with precise readings displayed on an LCD. The adjustable pressure of the hydraulic system guarantees precise control over the hydraulic power, meeting the required rolling force with ease.
(hydraulic drivers drawing)
Side roller apparatus
The side roller device is intricately crafted, comprising the side roller's main oil cylinder, self-aligning bearing, and additional bearings.
Bearing blocks steadfastly support the side roller, each side harmonizing seamlessly with the frame's guide rail.
The side roller bearing block's up-down movement is precisely driven by four strategically positioned oil cylinders within the frame. Sensors installed on the side rollers and frame measure this meticulous movement, with results prominently displayed on an LCD.
Achieving an exquisite cone shape, self-aligning bearings are utilized for both side and lower rollers. As the lower roller achieves level and the alignment becomes inclined, fine adjustments ensure a snug fit between the lower and side rollers, introducing an ideal degree of inclination relative to the horizontal.
3-4, hydraulic drop end
The hydraulic drop end device comprises oil cylinders, joints, bearing blocks, and more.
The hydraulic drop end system facilitates effortless removal of finished products along the Roller shaft.
Once the hydraulic drop end is closed or opened, the oil cylinder's stroke is deftly reset to zero.Powered by a dependable hydraulic station, the system ensures continuous high-performance operation.
Balance device
Our state-of-the-art balance device boasts an ingeniously compact structure, delivering exceptional performance by stabilizing the system when the tipping rack gracefully slips off the bearing surface of the top roller. As gravity elegantly guides the top roller's end downward, this advanced balance mechanism, strategically positioned on the fixed side, ensures flawless equilibrium. By maintaining a calculated distance from the fixed frame and being securely anchored by robust screws, it guarantees unwavering stability and unrivaled efficiency.
(plate rolling drawing)
Hydraulic System
Our cutting-edge hydraulic system is meticulously engineered from a high-precision gear pump, an expertly crafted valve group, and auxiliary pipelines, all working in seamless harmony for superior operation.
Employing the renowned Yuken superposition series, the hydraulic valve ensuresa
remarkably streamlined pipeline layout, drastically reducing leakage and simplifying maintenance for unmatched efficiency.
The system's architecture includes three distinct loops: pressure adjusting, synchronization, and speed loops, each playing a pivotal role in seamless operation.
The pressure adjusting loop masterfully modulates the system's working pressure through the main overflow valve, achieving a formidable working pressure of 16Mpa.
The synchronization loop precisely calibrates the in-phase movement of the lower roller employing the flow divider and throttle valve, facilitating accurate speed adjustments.
The speed loop is expertly designed to regulate frame descent, reset operations, and speed modifications via the throttle valve.
Electric Control System
The electric control system features a sophisticated integrated electric cabinet, a comprehensive operation control table, and a portable button box, all operating at 380V/50Hz. With built-in short circuit and overload protection for the main motor, it employs an AC contactor to deftly manage positive and reverse rotations. Utilizing advanced PLC programmable control technology, the system minimizes relay usage, enhancing stability and durability. Strategically placed buttons and indicator lights on the control table ensure streamlined management of the entire rolling process, overseeing every operational facet with unparalleled precision.
CNC System
The NC system is crafted with a high-precision rotational encoder and a highly reliable industrial controller, forming a consistent and dependable control framework.
CNC Function
CThis sophisticated NC system provides real-time monitoring, effortless data transmission, and reliable power-off memory throughout the rolling process.
The industrial control PLC performs automatic inspections of the lower position and both ends of the side roller, ensuring synchronization precision within ±0.15mm.
The programmable display offers immediate real-time visualization of the lower roller and side roller end positions,
with parameters that can be easily configured and adjusted.
With a displacement transducer resolution of 0.10mm, the display precision achieves an outstanding ±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 
){kind=link}