W11S-25X2500 Upper roller universal plate bending machine

(Lower roller and horizontal moving device) The picture is for reference only

The machine adopts an independent oil circuit system design with two functional sections. The first is the main transmission section, which supplies power to the top work roll; the second is the auxiliary transmission section, which provides power for the turnover of the winding head. A stacked valve structure is adopted, featuring the following advantages:

1. It reduces the space occupied by equipment and installation;

2. Specialized installation skills are not required, and the hydraulic system can be expanded or modified quickly and conveniently;

3. It eliminates the use of flow divider-combiner valve synchronization systems that are susceptible to inconsistent pressures between two cylinders, resolves issues such as leakage, vibration and noise caused by pipeline connections, and improves the reliability of the hydraulic system;

4. Composed of stacked modular components, the system facilitates maintenance and inspection.

Each oil circuit is equipped with two relief valves for pressure regulation. The maximum set pressure of each oil circuit is 25 MPa, which mainly controls the pressure of the main cylinder. The other relief valve is set at 16 MPa to regulate the pressure of the turnover cylinder and balance cylinder. The main cylinder in each oil circuit consists of two sets of stacked components to adjust the movement speed of the main cylinder, matching the operating speed requirements of the top roll under various working conditions. Proprietary pre-pressure relief technology is applied to effectively prevent hydraulic shock and extend the service life of pipelines and seals.

b. High-quality hydraulic components are selected to guarantee the stability of the hydraulic system.

c. Corresponding test points are installed at all input and output ports of the hydraulic system to facilitate maintenance and fault diagnosis.

d. The system is manufactured in strict compliance with national and industrial standards. Pipeline bends feature a reasonable radius of no less than 90° with smooth transitions. Vibration-damping pipe clamps are arranged properly to effectively suppress hydraulic shock and mechanical vibration, ensuring shock-free and vibration-free operation of hydraulic pipelines.

e. The system design fully prioritizes high efficiency and energy conservation to minimize power waste and heat generation sources.

Plan 1:

The picture is for reference only

Plan Two:

The picture is for reference only

7-1. Convex Top Roll with Supporting Roll Adjustment Beneath Bottom Rolls for High Straightness of Workpieces The supporting rolls installed under the bottom rolls are adjustable to precisely control the straightness of finished products, which significantly improves the linearity of workpieces.
7-2. Rear Bending Rolling for High Roundness of Workpieces Convex top rolls are adopted. The preset crown of the top roll is generally set to 70% of the uniformly distributed load on the roll. The bottom rolls feature a relatively small diameter and are supported by vertically adjustable supporting rolls underneath.Based on the load of rolled workpieces, the three-roll universal bending machine applies rear bending (the feeding direction of the plate is opposite to the moving direction of the top roll). While the top roll descends, the bottom rolls rotate to realize continuous bending. The plate ends can be pre-bent under direct pressure, eliminating rear angles caused by front bending. In addition, the length and shape of residual straight edges can be controlled.

In contrast, asymmetric three-roll machines usually adopt front bending. Operators need to pre-bend both ends of the plate first and then perform symmetrical rolling for forming. This mode requires skilled operators, tends to create rear angles on workpieces, and makes it difficult to control the shape of residual straight edges.

7-3. Measures to Reduce Edge Offset of Workpieces

The three-roll universal bending machine adopts the following solutions to lower the edge offset of finished products:

1. Control the dimensional accuracy and geometric tolerance of the center distance between the two bottom rolls as a key process;

2. Adopt electro-hydraulic synchronization of the top roll equipped with a feedback system for automatic leveling.

The stroke of the top roll hydraulic cylinder is detected by a rotary encoder and compared by the controller. High and low electrical signals are transmitted to the programmable logic controller (PLC), which controls the electromagnets of the electromagnetic directional valves at both ends of the top roll through continuous feedback and comparison.

Scope of Equipment

The Seller shall ensure a complete supply scope based on the principle of satisfying installation and operation requirements. The supply requirements specified in the technical specifications shall also serve as a supplement to this supply scope. If any missing items falling within the Seller’s supply scope are identified during installation, commissioning or operation, the Seller shall provide supplementary supplies.

For the complete machine’s electrical power distribution and control system, shielded cables shall be used for control cables, and all cables shall be Class C flame-retardant.

1) Machine body;

2) Electric control equipment;

3) Hydraulic device;

4) Auxiliary motor circuit accessories and necessary materials (wiring from motor circuit control lines to actuators)

5) Hydraulic pipeline accessories and necessary materials;

6) Paint;

7) Standard tools;

8) Anchor bolts;

9) Standard spare parts;

10) Technical documents;

B. Items Outside the Supply Scope

1. Foundation assembly, piping, wiring and other fittings at your factory;

2. Floor panels around the machine;

3. Initial electrical wiring fittings and necessary materials (from power source to control cabinet);

4. Earthing fittings and necessary materials;

5. Hydraulic oil and lubricating grease.