Pressure preparation system and pressure preparation method for compression oil cylinder of winding compression roller of splitting machine

Abstract

The invention discloses a standby pressure system and a standby pressure method for a pressing oil cylinder of a winding pressing roller of a splitting machine, the standby pressure system comprises an oil cylinder, an oil tank and control valves, and the control valves comprise an electromagnetic valve, a proportional valve and a pressure reducing valve; the pressure preparation method comprises the steps that the working pressure value and the backup pressure value of the oil cylinder are set based on the output pressure value; starting a rolling pressure test process, and adjusting a working pressure value and a backup pressure value; and film roll winding parameters and the slitting product yield are monitored, and the working pressure value and the backup pressure value are repeatedly adjusted. According to the invention, oil cylinder standby pressure driving is adopted, air pressure and oil pressure are combined for use, the stability of oil pressure transmission, the quick response characteristic of air pressure transmission and the simplicity and convenience of operation are integrated, and meanwhile, the complexity of a hydraulic system, the influence of temperature rise and the instability of air pressure are avoided; the hardness value of a rolled film is controlled, meanwhile, edge warping of a film roll is prevented, and the rolling effect and the cutting quality are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of slitting machines, and in particular to a standby pressure system and a standby pressure method for a winding pressure roller and a pressing cylinder of a slitting machine. Background Art

[0002] Slitting machine is a kind of equipment commonly used in processing various materials such as paper, film, non-woven fabric, label, composite material, etc. Its main function is to cut large rolls of materials into small rolls or products of specified length. Its working principle is to cut the raw material roll into a predetermined width or length by a high-speed rotating cutter. Slitting machine usually includes roll material conveying, slitting blade, tension control system, automatic winding and discharging, etc. It is widely used in packaging, printing, textile and electronics industries, which can improve production efficiency and ensure cutting accuracy and stability.

[0003] In the film cutting process, the existing slitting machine drives the winding roller to move linearly along the linear slide rail through the cylinder to push the roller to rewind. However, when the equipment is running at high speed, the gas as the working medium driven by the cylinder has a certain compressibility, which makes it difficult for the cylinder to maintain a stable transmission state in actual operation. Due to pressure fluctuations, there will be a certain degree of movement lag or slow reaction, resulting in the movement trajectory of the cylinder being not accurate enough. In addition, during the high-speed operation of the equipment, the transmission is not stable and vibration is prone to occur, which in turn affects the winding effect, resulting in uneven winding cross-section and displacement in severe cases, reducing the yield rate; at the same time, the working performance of the cylinder is greatly affected by environmental factors. Temperature changes, humidity fluctuations, and fluctuations in air source pressure will have a direct impact on the stability of the cylinder. Regular inspection, maintenance and adjustment of the cylinder system are required, which increases the operating cost and maintenance frequency of the equipment. Summary of the invention

[0004] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a slitting machine winding pressure roller pressing cylinder standby pressure system and standby pressure method.

[0006] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a slitting machine winding roller pressing cylinder standby pressure system, comprising: An oil cylinder, an oil tank and a control valve, wherein the oil tank and the oil cylinder are in communication, the oil tank and the control valve are electrically connected, and the oil cylinder controls the oil level in the oil cylinder to rise and fall through the control valve to drive the oil cylinder; The control valve includes a solenoid valve, a proportional valve and a pressure reducing valve. The proportional valve and a group of the solenoid valves control the oil tank to adjust the working pressure value of the cylinder. The pressure reducing valve and another group of the solenoid valves control the oil tank to adjust the backup pressure value of the cylinder.

[0007] In some of the embodiments, the oil cylinder is provided with a plurality of groups of oil inlets, and each group of the oil inlets is connected to a group of oil outlets of the oil tank.

[0008] In some of the embodiments, the oil inlet includes a working pressure side oil port and a backup pressure side oil port, and the oil inlet of each group of the cylinders is provided with a check valve.

[0009] In some embodiments, the solenoid valve includes a first drive valve, a second drive valve and a third drive valve, the first drive valve is electrically connected to the proportional valve and the third drive valve, respectively, and the second drive valve is electrically connected to the pressure reducing valve and the third drive valve, respectively.

[0010] In some embodiments, the first drive valve is connected to the air inlet of one group of oil tanks, and the second drive valve is connected to the air inlet of another group of oil tanks.

[0011] In some embodiments, the oil cylinder is symmetrically arranged at two ends of the winding roller, and the oil cylinder driving rod is connected to the side plate.

[0012] In some embodiments, the winding roller is installed on the side plate, and linear slide rails are symmetrically arranged on the side plate.

[0013] In some of the embodiments, a PLC module and a host computer are further included, and the proportional valve and the pressure reducing valve are electrically connected through the PLC module and the host computer.

[0014] In a second aspect, the present invention further provides a method for preparing a pressure cylinder for a winding roller of a slitting machine, which is performed by the preparation pressure system for the winding roller of a slitting machine as described in the first aspect, and the preparation pressure method comprises the following steps: S1, based on the output pressure value, set the working pressure value and backup pressure value of the cylinder; S2, start the winding pressure test process and adjust the working pressure value and the backup pressure value; S3, monitor the film roll winding parameters and the slitting product yield, and repeatedly adjust the working pressure value and the backup pressure value.

[0015] In some embodiments, the output pressure value F is: F=(S2*P2-S1*P1)*9.8; Among them, P1 is the backup pressure value, P2 is the working pressure value, S1 is the effective cross-sectional area of ​​the oil cylinder on the backup pressure side, and S2 is the effective cross-sectional area of ​​the oil cylinder on the working pressure side.

[0016] The present invention has the following beneficial effects: 1. The present invention adopts oil cylinder backup pressure drive, combines air pressure with oil pressure, integrates the stability of oil pressure transmission, the rapid response characteristics of air pressure transmission and the simplicity of operation, and avoids the complexity of the hydraulic system, the influence of temperature rise and the instability of air pressure; at the same time, the flow rate can be adjusted and the driving pressure is constant, which can achieve accurate driving force output; and the use of hydraulic oil as the working medium allows the transmission device to be automatically lubricated, effectively prolonging the service life and reducing the maintenance frequency and processing cost; 2. The present invention adjusts the working pressure value of the oil cylinder through a group of solenoid valves cooperating with the proportional valve, adjusts the backup pressure value of the oil cylinder through another group of solenoid valves cooperating with the pressure reducing valve, and realizes communication with the host computer through the PLC module, so it has good controllability and is easy to operate. By directly adjusting the pressure value through the host computer interface, the external force generated by other factors in the winding process can be effectively balanced, and the direct force of the equipment on the film roll during the winding process can be reduced, thereby controlling the hardness value of the winding film while preventing the edge of the film roll from warping, which can effectively improve the winding effect and cutting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A component connection diagram of the backup pressure system proposed by the present invention; Figure 2 The structure diagram of the winding structure of the backup pressure system proposed by the present invention is as follows Figure 1 ; Figure 3 The structure diagram of the winding structure of the backup pressure system proposed by the present invention is as follows Figure 2 ; Figure 4 It is a front view of the winding structure of the standby pressure system proposed by the present invention; Figure 5 A top view of the winding structure of the backup pressure system proposed by the present invention; Figure 6 This is a schematic flow chart of the pressure backup method proposed by the present invention; Figure 7 It is a structural schematic diagram of the oil cylinder in the present invention.

[0018] Legend: 1. Oil cylinder; 11. Oil inlet; 111. Working pressure side oil port; 112. Backup pressure side oil port; 2. Oil tank; 3. Control valve; 31. Solenoid valve; 311. First drive valve; 312. Second drive valve; 313. Third drive valve; 32. Proportional valve; 33. Pressure reducing valve; 4. Check valve; 5. Winding roller; 6. Side plate; 7. Linear guide rail. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The embodiment of the present application provides a slitting machine winding pressure roller clamping cylinder standby pressure system and standby pressure method, which solves the problem in the prior art that gas is used as the working medium for cylinder drive and has a certain compressibility, making it difficult for the cylinder to maintain a stable transmission state in actual operation, and a certain degree of motion lag or slow reaction will occur due to pressure fluctuations, resulting in an inaccurate movement trajectory of the cylinder, and during high-speed operation of the equipment, the transmission is not stable and is prone to vibration, which in turn affects the winding effect, resulting in an uneven winding cross section and displacement in severe cases, thereby reducing the yield rate. The present application adopts a cylinder backup pressure drive, combining air pressure and oil pressure, integrating the stability of oil pressure transmission, the rapid response characteristics of air pressure transmission and the ease of operation, while avoiding the complexity of the hydraulic system, the influence of temperature rise and the instability of air pressure; at the same time, the flow rate is adjustable and the driving pressure is constant, so accurate driving force output can be achieved; and hydraulic oil is used as the working medium, so that the transmission device can be automatically lubricated, effectively improving the service life, reducing the maintenance frequency and processing costs; at the same time, by directly adjusting the pressure value through the upper computer interface, the external force generated by other factors in the winding process can be effectively balanced, and the direct force of the equipment on the film roll during the winding process can be reduced, thereby controlling the hardness value of the winding film while preventing the film roll from warping, which can effectively improve the winding effect and slitting quality.

[0021] Please refer to the following examples for details: Reference Figure 1-Figure 7 The present invention provides an embodiment of a slitting machine winding roller pressing cylinder standby pressure system, and the specific structure includes: cylinder 1, oil tank 2 and control valve 3. Among them, oil tank 2 and cylinder 1 are connected, and oil tank 2 and control valve 3 are electrically connected. Oil cylinder 1 controls whether the air inlet of oil tank 2 is supplied by an external air source through control valve 3, thereby controlling the rise and fall of the internal oil level, so that hydraulic oil enters oil cylinder 1 to drive the piston rod to move.

[0022] It should be explained in detail that during the oil pressure transmission process, hydraulic oil is used as the working medium. Its incompressible characteristics ensure that the force is evenly distributed when transmitting power, thereby ensuring the stability of the entire transmission process. Whether in low-speed or high-speed operation, the shaking and impact caused by uneven power transmission can be effectively avoided; the hydraulic oil is driven by air pressure, and the hydraulic oil drives the piston rod of the oil cylinder 1 to drive the winding mechanism, so that the winding mechanism can maintain a stable operation state, effectively avoiding the shaking, jamming and other problems that may occur during the winding process, and ensuring the quality and efficiency of the winding; and the overall air and oil circuit system is simple and clear, and the connection relationship between each component is clear. Whether in the installation and commissioning stage of the system or in the subsequent operation and maintenance process, it can greatly reduce the difficulty of operation and maintenance costs, and improve the reliability and service life of the entire system.

[0023] Furthermore, in this embodiment, the control valve 3 includes a solenoid valve 31, a proportional valve 32 and a pressure reducing valve 33. The proportional valve 32 and a group of solenoid valves 31 are used to control the oil tank 2 to adjust the working pressure value of the oil cylinder 1, while the pressure reducing valve 33 and another group of solenoid valves 31 control the oil tank 2 to adjust the backup pressure value of the oil cylinder 1. In addition, the oil cylinder 1 is provided with multiple groups of oil inlets 11, and each group of oil inlets 11 is connected to a group of oil outlets of the oil tank 2. Specifically, the oil inlet 11 includes a working pressure side oil port 111 and a backup pressure side oil port 112, and each group of oil inlets 11 of the oil cylinder 1 is provided with a check valve 4 to prevent air backflow, thereby improving the transmission accuracy of the drive rod.

[0024] Please continue reading Figure 1 In this embodiment, the solenoid valve 31 includes a first drive valve 311, a second drive valve 312 and a third drive valve 313. The first drive valve 311 is electrically connected to the proportional valve 32 and the third drive valve 313 respectively, and the second drive valve 312 is electrically connected to the pressure reducing valve 33 and the third drive valve 313 respectively; the first drive valve 311 is connected to the air inlet of one group of oil tanks 2, and the second drive valve 312 is connected to the air inlet of another group of oil tanks 2.

[0025] Furthermore, the oil cylinder 1 is symmetrically arranged at both ends of the winding roller 5, and the driving rod of the oil cylinder 1 is connected to the side plate 6; the winding roller 5 is installed on the side plate 6, and the linear slide rail 7 is symmetrically arranged on the side plate 6; it also includes a PLC module and a host computer, and the proportional valve 32 and the pressure reducing valve 33 are electrically connected to the host computer through the PLC module. When in use, the oil cylinder 1 controls whether the air inlet of the oil tank 2 is supplied with air through the control valve 3, and then controls the rise and fall of the internal oil level, so that the hydraulic oil enters the oil cylinder 1 to drive the piston rod to move, and drives the winding roller 5 to move linearly on the linear slide rail 7.

[0026] It should be explained in detail that the third drive valve 313 is used to control the direction of inlet and outlet gas, promote the rise and fall of the liquid level in the oil tank 2, and convert the rise and fall of the liquid level into the telescopic movement of the drive rod of the oil cylinder 1, so that the drive rod of the oil cylinder 1 can move back and forth stably and accurately; the first drive valve 311 and the electrical proportional valve 32 are used to adjust the working pressure value of the oil cylinder 1, and communicate with the host computer through the PLC module, so that the pressure value can be directly adjusted on the host computer interface; the second control valve 3 and the pressure reducing valve 33 are used to adjust the backup pressure value of the oil cylinder 1 in the winding pressure test mode, and communicate with the host computer through the PLC module, and adjust the pressure value directly on the host computer interface. During production, processing or maintenance testing, only the required pressure value needs to be entered on the operation interface of the host computer, and the system can respond quickly and automatically complete the adjustment of the pressure value, which greatly improves the work efficiency and adjustment accuracy, effectively balances the external force generated by other factors in the winding process, and reduces the direct force of the equipment on the film roll during the winding process, controls the hardness value of the winding film, and prevents the film roll from warping, which can effectively improve the winding effect and cutting quality.

[0027] Reference Figure 6-Figure 7 The present invention also provides an embodiment of a method for preparing a pressure of the winding pressure roller 5 of a slitting machine and the pressing cylinder 1, which is performed by the preparation pressure system of the winding pressure roller 5 of the slitting machine and the pressing cylinder 1 in the above embodiment, and the preparation pressure method comprises the following steps: S1, based on the output pressure value, set the working pressure value and backup pressure value of cylinder 1; S2, start the winding pressure test process and adjust the working pressure value and the backup pressure value; S3, monitor the film roll winding parameters and the slitting product yield, and repeatedly adjust the working pressure value and the backup pressure value.

[0028] Please continue reading Figure 7 , it needs to be explained in detail that the output pressure value F is: F=(S2*P2-S1*P1)*9.8; Among them, P1 is the backup pressure value (in bar), P2 is the working pressure value (in bar), S1 is the effective cross-sectional area of ​​the backup pressure side cylinder 1 (in cm²), and S2 is the effective cross-sectional area of ​​the working pressure side cylinder 1 (in cm²).

[0029] Exemplarily, the detailed steps of setting the working pressure value and the backup pressure value of the oil cylinder 1 based on the output pressure value include: 1. Data collection and analysis Pressure value measurement: Use a high-precision pressure sensor to measure the output pressure of the oil cylinder 1. The pressure sensor should have high sensitivity and accuracy, and be able to monitor the pressure of the oil cylinder 1 under different working conditions in real time. Install the pressure sensor at key parts of the oil cylinder 1, such as the oil inlet 11, the oil outlet or near the piston cavity to ensure the accuracy of the measurement data; Then, the pressure data within a certain period of time (such as a production shift or a specific operation cycle) is collected to form a pressure value data set, which should include the pressure values ​​of the cylinder 1 at various stages such as starting, running, load change and stopping.

[0030] Data analysis and feature extraction: Analyze the collected pressure data and use statistical methods to calculate the characteristic parameters such as the average value, maximum value, minimum value, standard deviation, etc. of the pressure. Through data analysis, determine the typical pressure range of cylinder 1 during normal operation and possible pressure fluctuations; According to the production process requirements and the working characteristics of cylinder 1, the pressure requirements under different product production or operation tasks are analyzed (in high-speed winding operation, cylinder 1 needs to provide a higher stable pressure; while in low-speed and light-load operation, the pressure requirement is relatively low).

[0031] (II) Preliminary setting of working pressure value and backup pressure value Working pressure value setting: According to the data analysis results and combined with the production process requirements, determine the working pressure value of cylinder 1. The working pressure value should be sufficient to ensure that cylinder 1 can stably drive the load during normal operation, while avoiding damage to the equipment due to excessive pressure; Consider the rated pressure and safety factor of cylinder 1, and ensure that the set working pressure value is within the design allowable range of cylinder 1 (the working pressure value can be set to a safety value slightly lower than the rated pressure of cylinder 1. For example, if the rated pressure of cylinder 1 is 100 bar, the working pressure value can be set between 70-90 bar according to the actual operating conditions and safety requirements).

[0032] Backup pressure value setting: The backup pressure value is mainly used to ensure that cylinder 1 can maintain a certain operating capacity when the working pressure system fails to prevent load loss or equipment damage. The backup pressure value should be set based on the working pressure value and possible pressure loss (the backup pressure value can be set to a certain proportion of the working pressure value, such as 30%-50%; if the working pressure value is 80bar, the backup pressure value can be set between 24-40bar).

[0033] Exemplarily, the steps of starting the winding pressure test process and adjusting the working pressure value and the backup pressure value include: 1. Test preparation Equipment inspection and calibration: Before starting the winding pressure test process, conduct a comprehensive inspection of all related equipment, including checking the tightness and reliability of the pressure sensor, regulating valve, cylinder 1 itself, and connecting pipes to ensure that all equipment is in good working condition to avoid equipment failure affecting the test results; Calibrate pressure sensors and related measuring instruments to ensure the accuracy of measurement data, use standard pressure sources to calibrate pressure sensors, record calibration data and verify that measurement errors are within the allowable range; Test environment setup: Simulate the load conditions of the winding operation according to the actual production environment. Use simulated load devices, such as counterweights, hydraulic loaders, etc., to simulate film rolls of different weights and tensions. Ensure that the simulated load accurately reflects the load conditions in actual production so that reliable data can be obtained during the test.

[0034] 2. Stress testing and adjustment Start the test process: Start the winding pressure test process. Under the initially set working pressure value and backup pressure value, let the cylinder 1 drive the simulated load to perform the winding operation. During the test, the pressure, piston displacement, winding speed and other parameters of the cylinder 1 are monitored in real time, and the relevant data are recorded. Observe the tension of the film roll during the winding process to determine whether there are problems such as uneven tension and uneven tightness of the film roll. These problems may be related to improper setting of the working pressure of the oil cylinder 1 and require further analysis and adjustment. Adjustment of working pressure value: According to the phenomena observed and the recorded data during the test, the working pressure value is adjusted. If it is found that the film roll is wound too tightly, the working pressure may be too high, and the working pressure value should be appropriately reduced; on the contrary, if the film roll is wound too loose, the working pressure value may need to be increased; When adjusting the working pressure value, the amplitude of each adjustment should be moderate, for example, 5-10 bar each time, and observe the winding effect after adjustment. Repeat the adjustment process until satisfactory winding tension and winding quality are obtained.

[0035] Backup pressure value adjustment: During the test, simulate the failure of the working pressure system to check whether the backup pressure system can be started in time and maintain a certain operating capacity. If the backup pressure system cannot meet the requirements, the backup pressure value needs to be adjusted; When adjusting the backup pressure value, the matching relationship with the working pressure value should also be considered to ensure that the backup pressure can provide sufficient support in an emergency without interfering with normal work. For example, in the case of simulating the failure of the working pressure, observe the winding of the film roll under the action of the backup pressure, and adjust the backup pressure value according to the winding effect.

[0036] Exemplarily, the detailed steps of monitoring the film roll winding parameters and the slitting product yield and repeatedly adjusting the working pressure value and the backup pressure value include: 1. Monitoring of winding parameters Film roll tension monitoring: Use a tension sensor to monitor the tension of the film roll in real time during the winding process. The tension sensor should be installed on the winding path of the film roll and can accurately measure the radial tension of the film roll. Connect the tension sensor to the data acquisition system to record the tension data in real time; Analyze the changes in tension data to determine the stability of the film roll winding. Ideally, the tension of the film roll during the winding process should be kept within a relatively stable range. If the tension fluctuates too much, it may cause wrinkles, deviations, and other problems on the film roll, affecting product quality. Film roll diameter and winding layer monitoring: Optical sensors or other non-contact measurement methods can be used to monitor the diameter and number of winding layers of the film roll. These parameters can reflect the progress and quality of winding. As the diameter of the film roll increases, the winding tension may need to be adjusted accordingly to ensure the tightness and neatness of the film roll; According to the changes in the film roll diameter and the number of winding layers, analyze their impact on the winding pressure (when the film roll diameter increases, the winding line speed may change, and the working pressure value of cylinder 1 needs to be adjusted to adapt to the new winding working condition).

[0037] (II) Product yield rate monitoring Product quality inspection: After the film roll is wound, the product is inspected for quality. The inspection items include product dimensional accuracy, film surface flatness, etc. Online inspection equipment or offline sampling is used to conduct a comprehensive inspection of the slit products and calculate the yield rate; Analyze the reasons for product quality problems and determine whether they are related to the winding pressure (if the product has problems such as uneven film surface or scratches on the film surface, it may be caused by uneven tension during the winding process, and further inspection and adjustment of the winding pressure are required).

[0038] Pressure adjustment based on yield rate: According to the yield rate of the slitting product, repeatedly adjust the working pressure value and backup pressure value of cylinder 1. If the yield rate is low, it is necessary to carefully analyze the winding parameters and pressure settings (if the low yield rate is due to the film roll being wound too loosely, resulting in wrinkles on the film surface, the working pressure value can be appropriately increased; if the winding is temporarily out of control in some cases due to insufficient backup pressure, the backup pressure value should be increased; after each adjustment, re-perform the winding and slitting operations, and monitor the changes in the product yield until a satisfactory yield rate is obtained).

[0039] Through the above-mentioned technical scheme, the present application adopts the backup pressure drive of the oil cylinder 1, which combines the advantages of air pressure and oil pressure, and can achieve a more efficient, stable and precise driving effect. The oil pressure part provides the stability and high precision of the hydraulic system, ensuring the stability and durability during the driving process; and the air pressure part uses its rapid response characteristics to be able to adjust the output pressure and speed in an instant, thereby meeting the demand for rapid power adjustment under different production conditions, avoiding the volatility and instability that may exist in a single air pressure system, and overcoming the complexity and temperature rise problems of traditional hydraulic systems. The system can maintain a stable driving force output without being affected by temperature rise.

[0040] In addition, this oil-gas combined drive mode has the advantages of adjustable flow and constant drive pressure, and can accurately control the power output during the winding process to ensure the uniformity and high precision of the film winding. This precise control capability is particularly suitable for production environments with high speed and high precision requirements, effectively reducing product defects caused by unstable power, reducing scrap rates, and improving production efficiency.

[0041] More importantly, hydraulic oil, as a working medium, can not only provide stable power output, but also automatically achieve lubrication, reducing friction and wear of mechanical parts. Through the circulation of hydraulic oil, various components of the drive system are effectively lubricated, significantly extending the service life of the system. At the same time, this automatic lubrication feature also reduces the system's dependence on external lubrication, reducing the frequency of manual maintenance and repair costs.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A slitting machine winding roller pressing cylinder standby pressure system, characterized in that: include: An oil cylinder (1), an oil tank (2) and a control valve (3), wherein the oil tank (2) and the oil cylinder (1) are in communication, the oil tank (2) and the control valve (3) are electrically connected, and the oil cylinder (1) controls the oil level in the oil cylinder (1) to rise and fall and drives the oil cylinder (1) through the control valve (3); The control valve (3) comprises a solenoid valve (31), a proportional valve (32) and a pressure reducing valve (33); the proportional valve (32) and a group of the solenoid valves (31) control the oil tank (2) to adjust the working pressure value of the oil cylinder (1); the pressure reducing valve (33) and another group of the solenoid valves (31) control the oil tank (2) to adjust the backup pressure value of the oil cylinder (1).

2. The slitting machine winding roller pressing cylinder standby pressure system according to claim 1 is characterized in that: The oil cylinder (1) is provided with a plurality of groups of oil inlets (11), and each group of the oil inlets (11) is connected to a group of oil outlets of an oil tank (2).

3. The slitting machine winding roller pressing cylinder standby pressure system according to claim 1 is characterized in that: The oil inlet (11) comprises a working pressure side oil port (111) and a backup pressure side oil port (112), and the oil inlet (11) of each group of oil cylinders (1) is provided with a check valve (4).

4. The slitting machine winding roller pressing cylinder standby pressure system according to claim 1 is characterized in that: The solenoid valve (31) comprises a first drive valve (311), a second drive valve (312) and a third drive valve (313); the first drive valve (311) is electrically connected to the proportional valve (32) and the third drive valve (313), respectively; and the second drive valve (312) is electrically connected to the pressure reducing valve (33) and the third drive valve (313), respectively.

5. The slitting machine winding roller pressing cylinder standby pressure system according to claim 1 is characterized in that: The first drive valve (311) is connected to the air inlet of one group of oil tanks (2), and the second drive valve (312) is connected to the air inlet of another group of oil tanks (2).

6. The slitting machine winding roller pressing cylinder standby pressure system according to claim 1 is characterized in that: The oil cylinder (1) is symmetrically arranged at both ends of the winding roller (5), and the drive rod of the oil cylinder (1) is connected to the side plate (6).

7. The slitting machine winding roller pressing cylinder standby pressure system according to claim 1 is characterized in that: The winding roller (5) is mounted on the side plate (6), and linear slide rails (7) are symmetrically arranged on the side plate (6).

8. The slitting machine winding roller pressing cylinder standby pressure system according to claim 1 is characterized in that: It also includes a PLC module and a host computer, and the proportional valve (32) and the pressure reducing valve (33) are electrically connected via the PLC module and the host computer.

9. A method for preparing a pressure cylinder for a winding pressure roller of a slitting machine, characterized in that: The standby pressure method is performed via a standby pressure system of a slitting machine winding pressure roller (5) and a clamping cylinder (1) according to any one of claims 1 to 8, and the standby pressure method comprises the following steps: S1, based on the output pressure value, setting the working pressure value and the backup pressure value of the oil cylinder (1); S2, start the winding pressure test process and adjust the working pressure value and the backup pressure value; S3, monitor the film roll winding parameters and the slitting product yield, and repeatedly adjust the working pressure value and the backup pressure value.

10. The method for preparing the pressure of the winding roller and the pressing cylinder of the slitting machine according to claim 9, characterized in that: The output pressure value F is: F=(S2*P2-S1*P1)*9.8; Wherein, P1 is the backup pressure value, P2 is the working pressure value, S1 is the effective cross-sectional area of ​​the backup pressure side cylinder (1), and S2 is the effective cross-sectional area of ​​the working pressure side cylinder (1).

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