Delivery Time 45-60 Days After O.C.

Shipment Place Turkiye

Payment Terms % 50 T/T On O.C., % 50 T/T B.S.

Made In China

Min. Order Qty. 1 Pcs.

Warranty1 Year

The four working rollers are the core components of the plate rolling machine, and their quality directly affects the service life and rolling accuracy of the equipment. EZHONG strictly controls material selection and processing technology. The working rolls are made of 42CrMo alloy forge, which meet the second-level flaw detection standards. After quenching and tempering treatment, the hardness reaches HB260-300. It has excellent comprehensive mechanical properties, high strength and high wear resistance, suitable for high-load operations, ensuring long life and stable operation.

PRECISE ACCURACY
Roller plates with 100% symmetrical design, a thickness of less than 300mm with accurate precision and perfect bending.

BENDING PROCESS
100% symmetrical design for optimal forming and most precise bending results.

HIGH TORQUE
Superior torque, shorter installation time, higher productivity.

Symmetrical Force Design
The upper rollers adopt a double-layer symmetrical design, and the fluid side frame is a double-layer structure to ensure balanced force and effectively prevent the occurrence of large and small flattening deviations in the formed parts.

Pre-set Drum Work Roll
The upper and lower rollers are preset with drum compensation to offset the deformation caused by the pressure of the oil. The standard offset height is 50% evenly distributed and can be adjusted according to user needs to ensure high-precision rolling.

Side Roller Cylinder Inverted Installation
The side roller cylinder is installed upside down, with the cylinder moving and the piston rod fixed, which extends the side rail, improves rigidity, increases stroke and eliminates side relative displacement.

Electronic Balance System
Adopts electro-hydraulic proportional valve control to automatically adjust the balance between the lower roller and the side roller. The system error is controlled within ±0.15mm to ensure high precision rolling.

Main And Auxiliary Transmission Hydraulic Adaptive System
The upper and lower rollers are driven by hydraulic motors + planetary gear reducer. The hydraulic system automatically adjusts the speed of the main and auxiliary motors to prevent interference and avoid cracking the workpiece and working rollers.

Welding Seam Compensation Device
The oil cylinders at both ends of the lower roller are equipped with earring accumulators for difference-reducing and weld compensation. When passing the weld, the oil cylinder pressure increases and the wave pressure on the entire assembly adjusts the weld pass, the pressure released to ensure stable rolling.

Structure And Features Of 4-Roll Plate Bending Machine
The uppe and lower rollers of this machine are both driven rollers, and the power is transmitted to the upper roller through the planetary reducer to provide the rolling torque. The lower roller can be lifted vertically by the cylinder to clamp the plate. Side rollers are configured on both sides and can be lifted along the diagonal line by the hydraulic cylinder to ensure accurate forming. All four rollers use spherical roller bearings to ensure stable operation.

Machine Advantages
The machine can realize one-time loading and complete the pre-bending and rolling of both ends of the plate without auxiliary devices. It is suitable for the processing of cylindrical and arc-shaped workpieces. It also has shaping and leveling functions with small residual straight edges. The equipment integrates pre-bending and rolling functions, with high efficiency and high precision, meeting the market demand for high-quality rolled products.

Easy To Operate, Reducing Skill Requirements
After the sheet is set and clamped, all the forming work is done by the side rollers on both sides of the clamping roller. There is no need to turn the sheet over for pre-bending at both ends, and the rolling can be completed in one go. It is suitable for processing workpieces with wide range of thick plates and can be equipped with a CNC control system, making it suitable for processing workpieces with variable radius. An digital principle your device with comprehensive axes such as angles and multiple diameters.
Intelligent Control, Optimized Process Parameters
The equipment can input workpiece parameters such as plate thickness, plate width, and rolling diameter, and combine the human-machine interface and automatic control system to calculate and optimize the rolling process. The theoretical data generated by the computer needs to be adjusted through test plates and stored in the system after optimizing the parameters. Subsequent workpieces of the same batch and specification can directly call the data, saving time and improving efficiency.
Efficient Production, Reducing Labor Costs
After the plate is designed in the system, it can be carried out with the automatic control system. The system intelligently controls the entire process, reducing labor intensity and improving work efficiency.
High Precision Roll Forming
The lower roller and the sliders on both sides adopt a locking circuit composed of double hydraulic balance valves and H-type reversing valves, which ensure that the synchronization accuracy on both sides reaches ±0.1mm, so that each roller can stay accurately at any position to ensure high-precision rolling.
Suitable For Mass Production
The computer can store the program data, and subsequent workpieces of the same specifications can be directly called to achieve standardized production. The process is easy to operate, reduces dependence on skilled workers, improves processing accuracy, enhances equipment utilization, and is more suitable for mass production of large quantities of workpieces.

POWERFUL DRIVE

Synchronous Drive (Up And Lower Rollers Drive)

The upper and lower rollers are clamped synchronously to completely avoid slipping

Synchronous clamping effectively reduces the amount of straight edge with flat-end of the plate rolling

Absolute synchronization ensures more precise rolling accuracy

When rolling thin plates, narrow plates and tapered workpieces, the feeding is reliable and stable

Cylinder re-rolling and rolling defect correction are more convenient and easier to operate than 3-roll plate rolling machines; the side rollers can be adjusted at will to correct defects such as roll misalignment

This machine is equipped with a set of oil cooler

STRONG POWER
Excellent torque
Up and lower roller drive

UNIQUE DESIGN
The pre-bending of sheet metal ends and roll forming can be completed in one loading process

HYDRAULIC CYLINDER

EZHONG Designed and Manufactured
Plate Bending Machine With Maximum
Pressing Force Of 8000 tons

The cylinders are all made of forged steel, and the two main cylinders are equipped with replaceable wear-resistant bushings, which are sufficient to guide the entire stroke of the cylinder and ensure trouble-free operation. In addition, the cylinders are still capable of withstanding any lateral force when the upper roll is tilted, and the main cylinders have a "pressure-maintaining" function when the upper working roll applies pressure to the workpiece. The piston rods of all cylinders are ground and polished.

The main seal of the oil cylinder adopts internationally renowned brand products.

FULL FORGING MANUFACTURING
More stable and reliable
Cylinder body and piston rod are forgings

PRECISION MANUFACTURING
Chrome-plated piston rod
Cylinder body adopts honing process

RIGIDTY OF THE FRAME

The machine body is composed of a base, a fixed side frame and a tipping side frame, and adopts a steel plate welded structure. It has the advantages of light weight, low cost, good process ability and short production cycle.

The two side frames are fixed to the base by bolts and reinforced by connecting beams to improve the overall rigidity. The frame is provided with guide rails for the lower roller and the side roller. Since the upper roller bearing seat is provided in the fixed side frame, the overturning side frame includes an overturning frame support device.

When rolling the plate, the force is borne by the frame, and the base supports the whole machine and ensures accuracy. The base adopts a heavy-duty welded box beam structure, which has sufficient strength and rigidity to withstand the maximum load.

The surfaces of the frame and key components are processed. The sliding rails are embedded with wear-resistant materials and equipped with gap adjustment devices. The exposed parts are equipped with protective covers to prevent damage.

PREMIUM QUALITY STEEL WELDING

OVERALL ANNEALING TREATMENT STRESS RELIEF

OVERALL PROCESSING HIGHER PRECISION

WORKING ROLL MATERIAL
42CrMo/60CrMnMo (hot rolling) forgings

PROCESSING TECHNOLOGY
Upper and lower rollers, side rollers

INGOT CASTING
WORKBLANK
ANNEALING AFTER FORGING
ROUGH TURNING
QUENCHING AND TEMPERING
SEMI-FINISHING
LATHE FINISH

Hydraulic top support; maximum load-bearing capacity up to 150 tons
Hydraulic sides support
The working roll can be made of quenched and finely ground material or material with hot rolling function
Cone rolling device
1000°C hot rolling configuration (special design for stainless steel is available)
Automatic feeding platform

MACHINE ACCESSORIES

UP SUPPORT IS THE TOP BRACKET INSTALLED ON THE TOP OF THE RIGHT FRAME

Supports a maximum diameter of 16 meters and a maximum load of 150 tons

It consists of a movable bracket, a fixed bracket, a cylinder, a chain, and a pull rod. The movable bracket is pulled by the cylinder through the chain and moves up and down along the fixed bracket;

And supports the cylinder during the rolling stage to prevent the steel plate from collapsing due to its own weight during rolling. In case of overload, the cylinder can be protected by a relief valve.

The bottom of the fixed bracket is connected to the top of the right frame, and the top of the fixed bracket is connected to the anchor point on the foundation through a pull rod.

SIDES SUPPORT
Used to support the two sides of the large diameter cylinder to prevent the steel plate from collapsing due to its own weight during rolling, resulting in poor rolling accuracy. The two side supports have two rows of rollers, each supported by two cylinders. The two side supports can be used as roller tracks when laid flat. The side supports are equipped with cylinder alignment and correction devices, each sensing consisting of two corresponding cylinders and a movable box, which segment concentric and radial misalignment of the cylinder (pipe segment misalignment correction device), and the gripper can be added to grab the two sides of the plate and stretch forward and backward, which is convenient for quick alignment of the plate.

At the same time, an alignment baffle is welded on the side support, which is used in conjunction with the alignment and correction device to ensure the feeding accuracy of the steel plate.

FEEDING ROLLER TABLE
Support Length 50 meters, Load Bearing 150 tons.

It consists of rollers, brackets, motors, reducers, and driving cylinders, etc., and is used for supporting, feeding, and centering the steel plates to be rolled.

The roller conveyor is driven by a motor reducer. Two groups of oil cylinder pushers are arranged on both sides, one group at the front and the rear ends of the roller conveyor. The oil cylinder pushers can adjust the feeding position of the steel plate and are used to align the steel plate. They can be used to center the straight plate as well as the fan-shaped plate stayed on the rolled conical wind tower. Each push cylinder can be moved individually, and each group of push cylinders can also be moved simultaneously.

		STEEL PLATE ALIGNMENT Lower the side rollers on the discharging side, rotate the upper and lower working rollers in the opposite direction to transport the steel plate in the reverse direction. When the rear edge of the steel plate is roughly centered between the upper and lower working rollers, stop rotating to put the steel plate in the pre-bending position.
		STEEL PLATE PRE-BENDING Lift the side roller on the feeding side to pre-bend the steel plate locally. When the required rolling diameter is reached, release the side roller and stop it from moving upward

		CONTINUE PRE-BENDING The upper and lower working rollers rotate forward, transport the steel plate to the specified position along the feeding direction, and then stop rotating.
		FORMAL ROLLING Rotate the upper and lower working rollers forward, feed the steel plate, and check the rolling radius. If the leading edge does not reach the nominal radius, unlock the operation, lift the side roller on the discharge side, and reduce the rolling radius. If adjustment is required, reverse rotation can be returned to the initial position, and the rolling can be repeated until the nominal radius is reached.

ROLLING COMPLETED
After reaching the nominal radius, continue to rotate forward to feed the steel plate. When the trailing edge reaches the center position of the upper and lower working rollers, the pre-bending is automatically completed and the rolling is finished.

CONE ROLLING
The geometric design of the 4-roll plate rolling machine facilitates efficient rolling of conical workpieces. The bottom clamping rollers can be tilted, to grip the trailing edge of the sheet at the large end of the cone, thus increasing conveying speed and optimizing the process. At the same time, the “cone accessory” guides the small end of the sheet (the smaller diameter side of the cone), to slightly rotate it along the geometry, thereby controlling the feed speed of the short arc edge and ensuring uniform forming.

During the cone forming process, the side rollers needed to be able to ensure that the geometric shape that meets the process requirements is achieved. EZHONG 4-rolls plate rolling machine adopts electronically controlled bottom clamping system and side roller tilt adjustment function, to keep the plate in precise alignment during the rolling process, and achieve high-precision cone splicing.

Symmetrical design of the force on the two supporting points of the upper roller

The fixed side frame adopts a double-layer design, so that the two force points of the upper roller are symmetrical relative to the midpoint of the working surface of the working roller, and the rolling forming force is symmetrical, avoiding the occurrence of large and small heads of rolled products.

Working roller drum presetting

When rolling the plate, the plate pressure F will cause bending, i.e. deflection deformation D. The working roll is preset with a certain drum shape to compensate for the deflection deformation. Generally, the upper and lower rolls are preset with 50% of the uniform load according to the design standard. In special cases, it can also be preset according to the user's requirements

The side roll cylinder drive is installed inverted

The side roller oil cylinder is installed upside down, the cylinder moves, and the piston rod is fixed on the frame, which increases the guide surface, has better rigidity, longer stroke, and is more conducive to rolling small diameters.

The fully hydraulic four-roller plate rolling machine adopts an electro-hydraulic proportional valve control system to automatically balance the lower roll and side working rolls. The system balance error is ±0.10mm.

Main and auxiliary transmission hydraulic motor synchronous adaptive system

The upper and lower rollers of the four-roller plate rolling machine are both active rollers, and the transmission method is driven by a hydraulic motor plus a planetary gear reducer.

The hydraulic system drives the upper and lower working rollers to rotate by driving the hydraulic motor and the reducer to provide torque for plate rolling. The main motor is equipped with a rotary encoder to detect the rolled circumference of the plate.

The speed of the main and auxiliary hydraulic motors is adaptive to the rolling of plates of different specifications to prevent interference and avoid pulling the rolled products and working rollers.

Welding Seam Device

The cylinders at both ends of the lower roll use airbag accumulators, which are used for cylinder rounding and passing the weld. When passing the weld, the pressure of the lower roll hydraulic cylinder increases, and the hydraulic oil is pressed into the airbag; when passing the weld, the pressure decreases, and the airbag spits out the hydraulic oil.

Cone rolling device

Two damping cylinders are installed on the lower roller bearing seat. When rolling the cone, they interfere with the linear speed of the outer arc reducer of the product to ensure smooth cone rolling.

Fixed lower roller bearing seat upper cone devic

This machine is a hydraulic CNC four-roll plate rolling machine, and its main parts are composed of the frame, chassis and working rollers.

Frame

The overall welded structure of Q235 steel plate is adopted. The welds are strictly inspected and annealed after welding to eliminate internal stress. The frame is the main load-bearing component of the machine. It is designed with sufficient strength and rigidity to meet the needs of plate rolling. The welded frame is processed by CNC machine tools to ensure its accuracy. Frame processing technology: Steel plate shot blasting → CNC cutting and blanking → processing grooves of various plate-shaped parts → welding → overall annealing → processing by pentahedron machining center

Working Roll Main Parts Production

The working roll is the key working part of the machine. The working roll is made of 42CrMo and is tempered as a whole to HB280-300.

42CrMo steel is an ultra-high strength steel with high strength and toughness, good hardenability, and no obvious temper brittleness. 42CrMo allowable stress 186～310/MPa, yield point 930 σs/MPa, 42CrMo strength, hardenability high toughness, good toughness, small deformation during quenching, high creep strength and endurance strength at high temperature. 。

After quenching and tempering, it has high fatigue limit and resistance to multiple impacts, and good low-temperature impact toughness. This steel is suitable for manufacturing large rollers that require certain strength and toughness.

Working roll manufacturing process route

Cast steel ingot (chemical composition analysis)—— Surface inspection —— Forging blank —— Annealing after forging —— UT flaw detection —— Rough machining —— Heat treatment (quenching and tempering) —— UT flaw detection —— Semi-finishing —— Finishing —— MT

The machine is mainly composed of an upper roller device （1）Lower roller device（2）Side roller device（3）Tipping device （4）Balancing device（5）Left and right side frames （6 、7）Chassis（8）Lubrication system, Hydraulic system and Electronic control system.

Upper roller device

The upper roller device is composed of a main hydraulic motor（1）Coupling （2）Connecting Sleeve（3）Connecting Sleeve （4）Upper roller （5）Tipping Sleeve and（6）。

The main hydraulic motor (1) is equipped with an instant brake device with a pressure level of 25MPa.

The double-row spherical bearing (4) adopts a low-speed, heavy-load spherical roller bearing.

The upper roller (6) is drum-shaped. When designing the upper roller, the load coefficient of the maximum pressure of the upper roller is 0.5 uniformly distributed to pre-set and compensate for the deformation of the upper roller under stress.

The material of the upper roller (6) is alloy steel 42CrMo, quenched and tempered after rough machining, HB280-300, according to the JB/ZG4289-86 rolling roller steel standard, the rigidity meets (1/700~1/1000)L L—refers to the distance between the center lines of the two sides of the frame.

Upper roller stress cloud diagram

Upper roller strain cloud diagram

Lower roller device

The lower roller device consists of a lower roller motor (1), a lower roller coupling (2), an auxiliary transmission coupling frame (3), a lower roller (4), a lower roller double-row self-aligning bearing (5), a lower roller bearing seat (6) and a lower roller bearing support seat (7). The auxiliary hydraulic motor (1) is equipped with a brake device, and the pressure level is 25MPa.

The two lower roller main cylinders provide the pressure required for rolling the plate, and the working pressure of the main cylinder is 25MPa. 。

The lower roller (4) is made of alloy steel 42CrMo, HB280-300, and is quenched and tempered after rough machining. According to the JB/ZG4289-86 rolling roller steel standard, the rigidity meets (1/700~1/1000)L L—refers to the distance between the center lines of the two side frames.

The lower roller (4) is drum-shaped. When designing the lower roller, the load coefficient of the maximum pressure of the lower roller is 0.5 uniformly distributed to pre-set and compensate for the deformation deflection of the lower roller under stress.

The auxiliary hydraulic motor of the lower roller (4) transmits torque to the lower roller (4) through the coupling (2). The lower roller bearing seat support seat (7) adopts ZG350. The double-row spherical bearing (5) adopts low-speed, heavy-load spherical roller bearing.

Side roller device

The side roller device consists of a side roller cylinder (1), a double-row spherical bearing (2) and a side roller (3).

The side roller cylinders (1) provide the side roller pressure required for rolling the plate, and the working pressure of the main cylinder is 25MPa.

The double-row spherical bearing (5) adopts a low-speed, heavy-load spherical roller bearing.

The side roller (3) is made of alloy steel 42CrMo, HB280-300 after rough machining and tempering treatment. According to the JB/ZG4289-86 rolling roller steel standard, the rigidity meets (1/700~1/1000)L L—refers to the distance between the center lines of the two side frames.

Tipping device

The tipping device is composed of a tipping bearing seat (1), a tipping cylinder (2) and a pin (3).

The device drives the tipping frame to tip over and disengage the tipping end of the upper roller through the oil cylinder and hinge, so that the product can be taken out.

Body

side rack

Tip-over side rack

Chassis

The machine body consists of a base, a fixed side frame and a tipping side frame. Each part adopts a steel plate welded structure, which has the advantages of light weight, low cost, good processability and short production cycle.

The frames on both sides are fixed to the base by bolts with flat keys, and theframes on both sides are connected together with a connecting beam to make the whole machine rigid.

The two side frames are equipped with moving guide rails for the lower roller and the side roller, the fixed side frame is equipped with the upper roller bearing seat, which is a closed frame structure, and the overturning side frame is equipped with a supporting device for the overturning frame. The force during the rolling process is borne by the two side frames.

The base not only supports the weight of the machine and ensures the accuracy of the equipment, but also connects the whole machine into one. It is designed for heavy-duty welded box beams, with sufficient strength and rigidity to withstand the maximum downward force at the maximum load. The mounting surfaces of the edges of the frame and other components are processed.

Lubrication Method

The lubrication system of this machine adopts three methods according to the working conditions: oil immersion lubrication, automatic centralized lubrication and regular oil lubrication. The planetary reducers of the upper and lower roller main drive adopt oil immersion lubrication.

Selection Of Lubricating Oil

Manual regular lubrication points use No. 1 lithium-based grease (GB7324-2010), and automatic centralized lubrication uses No. 000 lithium-based grease (GB7323-2010). The planetary reducer uses 220# industrial gear oil.

Hydraulic System

Hydraulic Station

General Overview

The functions of the hydraulic system include: driving the rotation of the upper and lower rollers; driving the vertical and inclined lifting movements of the lower and side rollers; and the tilting and resetting movements of the tipping frame.

The lifting displacement of the lower and side rollers can be precisely controlled, and the working rollers can be stopped at any position. The machine is equipped with a hydraulic circuit that ensures synchronized rotation and consistent linear speed of the rollers, enabling fast and accurate straightening and positioning of the workpiece before rolling.

The hydraulic control system adopts an integrated valve block design for easy maintenance, ensuring excellent functionality and operational reliability. It includes oil filtration and an industrial chiller cooling system. No oil leakage is allowed in the entire hydraulic system.

The hydraulic piping layout is neat and user-friendly; the bends of the metal oil pipes are natural and reasonable.

The hydraulic oil tank is equipped with an industrial chiller to reduce and stabilize oil temperature, which must not exceed 45°C. Hydraulic components are selected from top-brand products to ensure long-term, leak-free operation.

To facilitate commissioning and maintenance, suitable pressure testing points and air release heads are provided on the hydraulic unit and pipelines.

The hydraulic station, components, and pipelines are all permanently and clearly labeled, consistent with the drawings, and a detailed troubleshooting guide for common faults in the hydraulic system of the plate rolling machine is provided.

The hydraulic system is equipped with suction and return oil filters to ensure system cleanliness, and an air filter to prevent moisture from entering the oil tank.

The system is composed of a plunger pump, valve group, fluid connectors, and hydraulic accessories. Stacked valve series are used for the hydraulic valves, with a simple pipeline layout for easy maintenance and debugging.

The system consists of four circuits: overpressure protection and pressure regulation circuit, synchronization circuit, speed control circuit, and working roller speed control circuit.

The pressure regulation circuit adjusts the system working pressure through the main relief valve.

The working pressure is 25 MPa. The synchronization circuit uses an electro-hydraulic proportional valve to synchronize the up and down movements of the lower and side rollers.

Displacement sensors are used for detection, with the positioning accuracy of the upper roller being ±0.10 mm.

The speed control circuit regulates the tipping and resetting speed of the tipping side through throttle valves. Servo technology is applied to control the flow via proportional valves, adjusting the working roller speed.

Protections

The hydraulic system has monitoring functions to supervise key pressure output points and oil temperature. In case of a malfunction, the system will automatically shut down and issue an alarm, indicating the fault location.

Overflow valves are installed for the upward and downward movements of the lower and side rollers to provide limit protection.

Electrical

Control System The control system is a dedicated control solution developed and manufactured by Ezhong for the fully hydraulic four-roll plate rolling machine. It is composed of the main electrical cabinet, control unit, hydraulic station, and mechanical actuators

The control unit collects various data through sensors for displacement, pressure, and temperature. The data is processed and logically controlled by a PLC (Programmable Logic Controller), and the real-time equipment status is displayed on an industrial touch screen.

This system is advanced in design, flexible in operation, safe and reliable in operation, and has good fault tolerance. It can continue to function reliably even when disconnected from a computer.

Functions of the Control System：

Display Functions：

Real-time measured data of the displacement, tilt, and pressure of the two main cylinders, horizontal displacement of the lower roll, and pressure of the balancing cylinder are displayed on the screen.

The data is visually represented with graphical and pointer-style pressure gauges to show both actual and limit values. The working status of each hydraulic solenoid valve is displayed: powered (red), unpowered (green).

The identifiers and layout of solenoid valves on the screen match those on the hydraulic station. The red and green signals correspond directly to the LEDs on the solenoid valves, aiding in fault analysis and inspection.

The speed detection window for the main cylinders allows monitoring the rising/falling speed of the left and right cylinders, enabling manual synchronization adjustment. The microcomputer system provides a rich display interface: pressure and displacement data are shown in real-time in color with graphics; PLC input status and each solenoid valve status are represented by green indicator lights (lit when energized, off when de-energized); alarms for limits and thresholds are highlighted in red in the lower-right section of the screen.

System Parameter Modification Function

Clicking on "System Parameter Settings" allows system parameters to be modified. This feature is password protected to prevent accidental or unauthorized changes, and only accessible by system administrators.

Process Parameter Storage Function

The system can store process parameters for different workpieces in a specific sequence. Users can retrieve stored process data for use in the program control interface at any time.Mature process parameters can be stored and reused as needed.

Software Protection Function

In addition to various limit switches and protective components, the electrical control system has software protection capabilities. It monitors and controls extreme positions of rollers, cylinder pressure limits, hydraulic oil level, oil temperature, and filter clogging status.

When rolling small or pre-bent workpieces, the operator can set a custom insurance pressure (lower than the machine’s rated maximum) based on the calculated load, ensuring safe operation.

Human-Machine Interface Function

The system provides comprehensive user assistance, including:

Full set of user manuals
Hydraulic circuit diagrams
Electrical schematics
Lubrication charts
Safety operating procedures
High/low voltage operating instructions
Hydraulic and electrical troubleshooting guides
Original instruction manuals for key components
List of wearing parts with part numbers
Specifications and manufacturers of key supporting components
Original test data recorded during installation and commissioning for future reference by the end user during operation and maintenance.

JB/T 12829.1-2016	Four-roller plate rolling machine, Part 1: Type and basic parameters
JB/T 12829.2-2016	Four-roller plate rolling machine, Part 2: Technical conditions
JB/T 12829.3-2016	Four-roller plate rolling machine, Part 3: Accuracy
GB/T 3766	General technical conditions for hydraulic systems
GB/T 10923-2009	General rules for precision inspection of forging machinery
JB/T 1829-1997	General technical conditions for forging machinery
GB 17120-2001	Safety technical conditions for forging machinery

Main Configuration Table

No.	Name	Manufacturer & Description	Remarks
1	Working roll	Jinlei Co., Ltd., Tongyu Heavy Industry, Huawei, Baoding, Tianjin Heavy Industry, Yuanxun Special Steel
2	Working roll bearing	Harbin Bearing, Wazhou Bearing, Luoyang Bearing Double row spherical bearings	29
3	Main electrical components	Schneider, Siemens AC contactor, thermal relay
4	Displacement sensor	Balluff of Germany, Gefran of Italy, NOVO of Germany, Nanjing Xiju
5	PLC system	Siemens S7-1200
6	Industrial computer	CUSN Apchi, Advantech of Taiwan, Siemens, CUSN of Taiwan	With touch function
7	Motor	Shandong Huayu, Shandong Zotye, Zhejiang Gexin, Sanxin of Huanggang, Hubei
8	Hydraulic valve	Yuci Oil Research, Northern Taiwan Precision Machinery, Beijing Huade
9	Hydraulic pump	Qidong Hengyuan, Qidong Hydraulics, Taizhou Hongyi
10	Hydraulic motor	Italian SAI, Ningbo Zhongyi, Ningbo Pekka, Italian Roots, Taiwan Kaijia
11	Master cylinder seal	Japanese NOK, British HALLITE
12	Planetary reducer	Tyrone, Guomao, Jujing, Ningbo Pekka, Hanergy Transmission, Ningbo Xinhong
13	Oil cooler	Wuxi World, Tianjin Furuize, Jiangsu Tuobo
14	Centralized lubrication system	Nanjing Beiqier, Shandong Zibo

Scope of Supply

1．Supply

（1）Main machine

（2）Hydraulic equipment 30

（3）Electronic control equipment

（4）Lubrication equipment

（5）Anchor bolts and random accessories

（6）Instruction manual (including circuit diagram and detailed list, foundation diagram, etc.)

Certificate of conformity, packing list, detailed list of accessories User-provided Infrastructure Hydraulic oil and grease Primary side wiring of power supply

Tools with Machine

NO.	Name	Qty	Note
1	Hexagon wrench 3-19	1	Set
2	Adjustable wrench 250	1	Set
3	Pipe wrench 350	1	Set

Spare Parts

NO.	Name	Qty	Note
1	Pipe seals	2	Set
2	Buttons	2	Set
3	Indicator lights	2	Set
4	Micro relays	2	Set
5	Knobs	2	Set
6	Proximity switches	2	Set

a）Lower the side roller (discharging side)

b）Start reverse rotation The upper and lower working rollers rotate to convey the steel plate in the opposite direction of the feeding direction.

c）When the rear edge of the steel plate is roughly centered between the upper and lower working rollers, stop reverse rotation. At this point, the steel plate is in the pre-bending position.

a) Lift the side roller (feed side). Move the side roller upward to pre-bending the steel plate partially.

b) When the required rolling diameter is reached, release the side roller and stop the upward movement of the side roller.

a）Start forward rotation

b）The upper and lower working rollers rotate to feed the steel plate in the feeding direction.

c）When the steel plate reaches the position shown in the figure above, stop forward rotation.

a）Check the radius with a radius gauge and make corrections if necessary.

b）Start forward rotation.

c）The upper and lower working rollers rotate and continue to feed the steel plate in the feed direction.

d）。When the steel plate reaches the position shown in the figure above, stop forward rotation.

e）Lower the side roller (feed side)

f）Release the side roller and stop the side roller from moving downward.

g）Lift the side roller (discharge side).

h）When the other side roller touches the steel plate, the side roller is released and stops moving upward.

Check the rolling radius

a）Start forward rotation.The upper and lower working rollers rotate to feed the steel plate in the feeding direction.

b）Stop forward rotation and check the coiling radius.

c）Lock the operation function and use the radius gauge to check the coiling radius. The formed leading edge does not reach the nominal radius.

d）Unlock the operation function and lift the side roller (discharging side). The side roller continues to move upward, and the radius of the steel plate will decrease. By reverse rotation, the steel plate is returned to the initial position and re-coiled. Repeat this process until the required nominal radius is reached.

The steel plate has been pre-bending

Completed steel plate rolling

The steel plate has reached the nominal radius we require. Start forward rotation, the upper and lower working rollers rotate, and the steel plate is fed in. When the trailing edge reaches the center between the upper and lower working rollers, stop forward rotation. At this position of the working roller, the trailing edge is automatically pre-bending.

After the equipment is delivered, both parties shall hold an installation coordination meeting to clarify their respective rights and obligations. The buyer shall provide training or explanation to the supplier's personnel, covering installation and commissioning coordination, acceptance personnel division of work, on-site labor discipline, and civilized construction. Both parties shall designate installation and commissioning contacts, who will handle all matters during the installation process.

The buyer shall carry out foundation construction based on the foundation drawings provided by the supplier. Construction shall commence after mutual approval of the drawings.

The buyer is responsible for the construction of the foundation, fences, and cover plates, as well as for supplying hydraulic oil, gear oil, and other lubricants required for equipment operation.

The buyer is responsible for equipment unloading, lifting tools, and personnel coordination.

During the installation and commissioning by the supplier's personnel, the buyer shall assign 2–3 people to be present on-site to become familiar with the equipment structure and installation/maintenance methods. It is recommended that the operator and maintenance personnel follow the entire installation and commissioning process. 5 Knobs 2 Set 6 Proximity switches 2 Set 32 The supplier is responsible for the equipment installation, commissioning, and precision control, with on-site cooperation from the buyer.

The supplier shall carry out installation and commissioning in accordance with the installation and commissioning outline. 。The supplier’s installation personnel shall ensure civilized construction on-site and comply with the buyer’s labor discipline and necessary rules and regulations.

Acceptance

Pre-Acceptance of the Equipment

Before delivery, the buyer’s representatives shall visit the supplier’s production site for pre-acceptance of the equipment. Upon successful pre-acceptance, both parties shall sign a pre-acceptance report, and the buyer shall receive initial on-site technical training.

The pre-acceptance includes inspection of the main equipment precision, trial processing of parts, and checking the accompanying accessories and spare parts, including installation and commissioning tools, maintenance tools, essential equipment accessories, consumable parts, and spare parts.

Final Acceptance of the Equipment Final acceptance shall take place at the buyer’s site and shall be conducted in accordance with the technical agreement or the acceptance outline. The buyer shall provide typical test workpieces for inspection. Before acceptance testing, the supplier shall verify the test pieces and has the right to reject severely deformed or otherwise non-compliant pieces, which shall be replaced by the buyer

If the machining accuracy of the test pieces meets the requirements of the contract and technical agreement, both parties shall sign the equipment acceptance report and proceed with the handover of the equipment.

Training

During equipment installation, commissioning, and initial operation, the supplier shall provide training for the buyer's operators and maintenance personnel on equipment operation, usage, and maintenance, until the buyer’s personnel can operate independently.

Painting

All metal components of the machine, except for assembly surfaces and electroplated surfaces, shall undergo sandblasting and rust removal treatment, with the surface reaching Sa2.5 grade.

The paint surface shall be smooth and glossy, with uniform film thickness and no defects such as sagging or missed spraying. The paint film thickness shall not be ess than 100μm.

The equipment body shall be painted according to the color code provided by the buyer; rotating parts and pipelines shall comply with national safety color standards.

Packaging and Transportation

The packaging shall be suitable for long-distance transport, moisture-proof, rust-proof, and resistant to rough handling, suitable for both railway and road transport.

The equipment shall be suitable for overall hoisting, with the hoisting center of gravity and lifting points clearly marked.

Packaging shall indicate the part names, quantities, and include the packing list.

Quality Assurance and After-Sales Technical Service The warranty period is 12 months. During the warranty period, the supplier shall replace any failed or damaged parts free of charge if the failure is due to quality issues. After the warranty period, the supplier shall provide lifetime paid maintenance and spare parts at preferential prices. After any software upgrade of the equipment control system, the supplier shall promptly notify the buyer and provide upgrade services.

Model W12 20x4000

Max Plate Thickness mm 20

Max Pre-bending Thickness mm 18

Max Plate Width mm 4000

Plate Yield Limit mpa 245

Min Diameter at Full Load mm 675

Upper Roll Diameter mm 450

Lower Roll Diameter mm
430

Side Roll Diameter mm 370

Motor Power KW 37

Upper Roll Pressing Force Ton 220

Equipment Tonnage Ton 23

Model	W12	20x4000
Max Plate Thickness	mm	20
Max Pre-bending Thickness	mm	18
Max Plate Width	mm	4000
Plate Yield Limit	mpa	245
Min Diameter at Full Load	mm	675
Upper Roll Diameter	mm	450
Lower Roll Diameter	mm	430
Side Roll Diameter	mm	370
Motor Power	KW	37
Upper Roll Pressing Force	Ton	220
Equipment Tonnage	Ton	23

Ezhong W12-20x4000mm 4 Rolls Hydraulic Plate Bending Machine (Ezhong W12-20x4000mm )

ROLLING COMPLETED After reaching the nominal radius, continue to rotate forward to feed the steel plate. When the trailing edge reaches the center position of the upper and lower working rollers, the pre-bending is automatically completed and the rolling is finished.