Calender high-precision adjusting method and device

Abstract

The invention discloses a high-precision adjustment method for a calender, and relates to the technical field of calenders, and the high-precision adjustment method for the calender comprises the following steps: obtaining the rotating speeds of at least one first roller and at least one second roller in real time; when the rotating speed of the first roller is consistent with the rotating speed of the second roller, the rotating angle of at least one first roller and the surface runout value of each rotating angle in the idle state of the first roller are obtained in real time; drawing a surface runout numerical curve of the first roller based on the rotation angle and the runout numerical value; generating a reverse compensation curve according to the run-out value curve; and a servo motor is controlled to adjust a screw of the first roller according to the reverse compensation curve. According to the invention, the initial precision problem caused by machining and assembly errors of a new calender can be effectively solved, the problem of precision reduction caused by aging and abrasion of the calender in the long-term use process can be solved, the defective rate of products is remarkably reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of calendering technology, and in particular to a high-precision adjustment method and device for calendering. Background Technology

[0002] The thickness accuracy of traditional calenders relies on machining and assembly precision, but this has significant limitations. Even brand-new calenders cannot completely eliminate machining and assembly errors. Machining precision has physical limits, making it difficult to achieve ideal accuracy. During assembly, gaps in component fits and bearing installation errors can cause roller runout during rotation, affecting the consistency of calendered material thickness and introducing inherent thickness tolerances from the outset. Over long-term use, equipment aging and wear exacerbate these accuracy errors. Roller surface wear, increased bearing clearances, and loose transmission systems further aggravate roller runout, widening the thickness fluctuation range, reducing product quality, and increasing the defect rate. Existing compensation methods are either complex and expensive or have limited effectiveness, failing to fundamentally solve the thickness error problem caused by mechanical errors and wear. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a high-precision adjustment method and device for a calender, so as to solve the problem of precision error caused by mechanical errors in the initial processing and assembly and aging and wear during long-term use in traditional calenders.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A high-precision adjustment method for a calender, characterized by comprising: The rotational speeds of at least one first roller and at least one second roller are acquired in real time. When the rotational speed of the first roller is the same as that of the second roller: the rotational angle of at least one first roller is acquired in real time, and the surface runout value of each rotational angle of the first roller in the idling state; Based on the rotation angle and the runout value, plot the surface runout value curve of the first roller; A reverse compensation curve is generated based on the fluctuation value curve; The servo motor is controlled to adjust the screw of the first roller according to the reverse compensation curve.

[0005] Preferably, based on the rotation angle and the runout value, plotting the runout value curve of the first roller surface includes: The obtained rotation angle and the jump value are output according to a preset rule, and the corresponding jump value of the first roller at each specified rotation angle is output. Based on the specified rotation angle and the corresponding runout value, a surface runout curve of the first roller at the specified rotation angle is plotted.

[0006] Preferably, the preset rule is to divide the rotation angle of the first roller acquired in real time into equal parts according to the measurement requirements to obtain the corresponding specified rotation angle.

[0007] Preferably, after controlling the servo motor to adjust the screw of the first roller according to the reverse compensation curve, the process includes: The distance difference between the first distance sensor to the surface of the calendered sheet and the second distance sensor to the surface of the first roller is acquired in real time; wherein the calendered sheet is located on the first roller, and the distance difference is the measured thickness of the calendered sheet.

[0008] Preferably, the measured thickness of the calendered sheet is compared with the preset thickness of the calendered sheet. When the measured thickness is inconsistent with the preset thickness, the servo motor is controlled to adjust the screw of the first roller so that the thickness of the calendered sheet after calendering through the first roller and the second roller conforms to the preset thickness.

[0009] A high-precision adjustment device for a calender, characterized in that it comprises: A rotational speed acquisition unit is used to acquire the rotational speed of at least one first roller and at least one second roller in real time; The judgment unit is used to determine whether the rotational speed of the first roller is consistent with the rotational speed of the second roller; An angle acquisition unit is used to acquire the rotation angle of at least one of the first rollers in real time when the rotation speed of the first roller is the same as that of the second roller. The data acquisition unit is used to acquire the surface runout value for each rotation angle when the first roller is in an idling state; The control unit is used to plot the surface runout curve of the movable roller based on the rotation angle and the runout value, and generate a reverse compensation curve based on the runout curve. A servo motor unit is used to control the servo motor to adjust the screw of the first roller according to the reverse compensation curve.

[0010] Preferably, the angle acquisition unit is coaxially arranged with the first roller.

[0011] Preferably, the data acquisition unit includes a lever structure and an electronic dial indicator. The electronic dial indicator is detachably mounted on the lever structure. The lever structure includes a support base and a lever. One end of the lever is located between the first roller and the second roller and abuts against the surface of the first roller.

[0012] Preferably, a first distance sensor and a second distance sensor are used. The first distance sensor acquires a first distance from the first distance sensor to the surface of the calendered sheet in real time, and the second distance sensor acquires a second distance from the second distance sensor to the surface of the first roller in real time. The calendered sheet is located on the first roller, and the difference between the first distance and the second distance is the measured thickness of the calendered sheet.

[0013] Preferably, the measured thickness of the calendered sheet is compared with the preset thickness of the calendered sheet. When the measured thickness is inconsistent with the preset thickness, the servo motor unit controls the servo motor to adjust the screw of the first roller so that the thickness of the calendered sheet after calendering through the first roller and the second roller conforms to the preset thickness.

[0014] Compared with the prior art, the beneficial effects that this invention can achieve are: This invention provides a high-precision adjustment method for a calender. By acquiring the rotational speeds of the first and second rollers in real time, and when their speeds are synchronized, the method further acquires the rotation angle of the first roller and its surface runout value at each rotation angle during idle operation. Based on this key data, a surface runout curve of the first roller is plotted, thus visually presenting the roller's error. A reverse compensation curve is generated based on this curve, and a servo motor is controlled to adjust the screw of the first roller according to the reverse compensation curve. This effectively compensates for the runout error at each rotation angle of the roller, improving the precision of the calendered product. This process not only effectively solves the initial precision problem of a new calender caused by machining and assembly errors, but also addresses the precision degradation caused by aging and wear during long-term use, significantly reducing the product defect rate and improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a high-precision adjustment method for a calendering machine according to the present invention; Figure 2 This is a schematic diagram of a high-precision adjustment device for a calendering machine according to the present invention; Figure 3 This is a schematic diagram of the data acquisition unit structure of the present invention; Among them: first roller 1; second roller 2; lever structure 3; support base 31; lever 32; electronic dial indicator 4. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention is further described below in conjunction with specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this invention.

[0017] In the manufacturing process of traditional calenders, due to limitations in machining and assembly processes, it is difficult to completely avoid precision errors. In machining, the precision of the machining equipment, tool wear, and subtle differences in the machining process can all lead to deviations in the dimensions and shapes of key components such as rollers, bearings, and frames. These deviations accumulate and amplify during assembly, making it difficult for the overall precision of the assembled calender to reach an ideal state. For example, roller cylindricity errors, bearing clearances, and frame deformation can all affect the uniformity of material thickness during calendering. Furthermore, component clearances, bearing installation errors, and unreasonable assembly processes can also lead to a decrease in the initial precision of the equipment.

[0018] Furthermore, with prolonged use, the precision of the calender will further decline due to wear and aging. During continuous contact with the calendered material and the calendering process, the roller surface will gradually wear down, leading to a reduction in roller diameter and an increase in surface roughness. Bearings will also develop clearances due to wear of the rolling elements and raceways over extended periods, affecting the roller's rotational accuracy. In addition, wear and loosening of components such as gears and chains in the transmission system will reduce transmission precision, thus affecting the roller's rotational speed synchronization and the thickness control of the calendered material. Aging of the equipment's foundation components, such as frame deformation and loosening of anchor bolts, will also compromise the calender's initial precision.

[0019] This invention effectively solves the initial accuracy problem of new calenders caused by machining and assembly errors by real-time monitoring of the roller rotation angle and surface runout value, plotting the surface runout value curve, and generating a reverse compensation curve. A servo motor is then used to adjust the roller screw according to the reverse compensation curve, effectively resolving the initial accuracy problem. Simultaneously, during the calendering process, the thickness of the calendered product is measured in real-time and compared with a preset thickness, further adjusting the roller screw to ensure the thickness of the calendered product meets requirements. This not only solves the initial accuracy problem of new machines but also overcomes accuracy errors caused by wear and aging after long-term use, significantly improving the calender's control accuracy on the thickness of the finished product, enhancing the adaptability and stability of the equipment, reducing the defect rate, improving product quality and production efficiency, and lowering production costs and maintenance difficulty.

[0020] This invention is applicable to various types of calenders, including but not limited to two-roll calenders, three-roll calenders, and four-roll calenders. The calender can be used to calender metal materials, rubber materials, plastic materials, or other materials. Metal materials include aluminum alloys, steel, copper, etc.; rubber materials include natural rubber, synthetic rubber, etc.; and plastic materials include polyvinyl chloride (PVC), polyethylene (PE), and polypropylene (PP), etc. These materials are calendered by a high-precision calender to obtain sheets that meet the thickness requirements.

[0021] like Figure 1 As shown, the present invention can use a PLC controller or other control methods for high-precision adjustment of the calender. This application uses a PLC controller as an example for illustration. Specifically, the present invention provides a method for high-precision adjustment of a calender, characterized by comprising: Step 101: Real-time acquisition of the rotational speeds of at least one first roller and at least one second roller; Step 102: When the rotational speed of the first roller is the same as that of the second roller: The rotation angle of at least one of the first rollers is acquired in real time, and the surface runout value of each rotation angle of the first rollers when they are idling. Step 103: Based on the rotation angle and the runout value, plot the surface runout value curve of the first roller; Step 104: Generate a reverse compensation curve based on the fluctuation value curve; Step 105: Control the servo motor to adjust the screw of the first roller according to the reverse compensation curve.

[0022] In step 101, the rotational speeds of at least one first roller and at least one second roller are acquired in real time. The rotational speeds of the first roller or the second roller can be acquired through a speed measuring instrument, a motor control system, or video image processing, and then the rotational speed information is sent to the PLC controller in real time.

[0023] The tachometer can be either a contact type or a non-contact type. A contact tachometer measures linear velocity by contacting the roller surface, while a non-contact tachometer uses technologies such as lasers or infrared to measure roller speed. Non-contact tachometers are simple to operate and provide intuitive measurement results.

[0024] The rotational speed measurement method based on the motor control system involves the calender's rollers being driven by a variable frequency motor. The output frequency and rotational speed characteristics of the variable frequency motor can be detected to calculate the roller's rotational speed. This method requires no additional equipment, is low in cost, and has high accuracy.

[0025] This method of measuring rotational speed based on video image processing uses a high-speed camera to capture the rotational process of the roller, and then analyzes the images captured by the camera through image processing algorithms to calculate the rotational speed of the roller. It is suitable for calendering machines where it is difficult to directly install measuring equipment.

[0026] The first roller is a movable roller, and the second roller is a fixed roller. The movable roller refers to a roller that moves relative to each other between two adjacent rollers. That is, the distance between the two rollers is adjusted by adjusting the screw of one roller to move it towards the other roller.

[0027] Specifically, taking a three-roll calender as an example, its roller spacing adjustment device includes three rollers—upper, middle, and lower—in the frame. The movable bearing seats at both ends of the middle roller are fixed in the frame, while the movable bearing seats at both ends of the upper and lower rollers are movably mounted in the frame. The movable bearing seats of the upper and lower rollers are connected to the inner end of a screw via a connector. The screw and connector are axially locked but radially rotatable. The screw's threaded fit is located in the threaded through-hole of a threaded sleeve on the frame, and the outer end of the screw is connected to a rotary drive device. When it is necessary to adjust the spacing between adjacent rollers, the PLC controller activates the rotary drive device, causing the screws of the upper and lower rollers to rotate. Since the threaded sleeves are fixed in the frame, the screws of the upper and lower rollers drive the movable bearing seats to move axially relative to the threaded sleeves, thereby achieving the purpose of adjusting the spacing between the upper and middle rollers or between the lower and middle rollers. By adjusting the rotation angle of the screws of the upper and lower pressure rollers, the moving distance of the movable bearing seat can be precisely controlled, thereby achieving precise adjustment of the pressure roller spacing. The upper and lower pressure rollers are the movable rollers mentioned in this application, while the middle pressure roller is a fixed roller.

[0028] Step 102: When the rotational speed of the first roller is the same as that of the second roller: The rotation angle of at least one of the first rollers is acquired in real time, and the surface runout value of each rotation angle of the first rollers when they are idling. In step 102, the PLC controller compares the obtained rotational speed of the first roller with that of the second roller. When their speeds are the same, the rotational angle of the first roller is acquired by the control angle acquisition unit, with a range of 0°-360°. While the first roller is idling, the surface runout value of the first roller at each rotational angle is acquired by the control data acquisition unit. The angle acquisition unit can be an angle sensor, and the data acquisition unit can be an electronic dial indicator. The angle sensor is installed at the bearing position of the roller to accurately capture changes in the roller's rotational angle, while the dial indicator is used to measure its surface runout.

[0029] Step 103: Based on the rotation angle and the runout value, plot the surface runout value curve of the first roller; In step 103, the PLC controller uses the acquired rotation angle and runout value of the first roller to plot a surface runout curve of the first roller. Specifically, the PLC controller integrates the rotation angle and corresponding runout value obtained in step 102, using the rotation angle as the abscissa and the runout value as the ordinate, to generate a curve reflecting the surface runout of the roller at a specified rotation angle. This curve visually presents the runout amplitude of the roller at different rotation angles, helping operators or the control system quickly identify whether there is abnormal runout of the roller. This step enables operators to accurately grasp the operating status of the roller, providing a basis for subsequent optimization and adjustment, and ensuring that the accuracy and quality of the calendering process are effectively controlled.

[0030] In a preferred embodiment of this application, the obtained rotation angle and runout value are output according to a preset rule, showing the runout value of the first roller at each specified rotation angle. Based on the specified rotation angle and the corresponding runout value, a surface runout value curve of the first roller at the specified rotation angle is plotted. The preset rule involves evenly dividing the real-time acquired rotation angle of the first roller according to measurement requirements to obtain the corresponding specified rotation angle. The PLC controller of this application evenly divides the real-time acquired rotation angle according to measurement requirements to determine a series of specified rotation angles. Then, for each specified rotation angle, the corresponding runout value is output. Finally, using these specified rotation angles and the corresponding runout values, the surface runout value curve of the first roller is plotted. This processing method can more accurately reflect the runout of the roller at key positions, providing a more reliable basis for subsequent analysis and adjustment. By evenly dividing the rotation angle, the uniform distribution of data can be ensured, further improving the accuracy and practicality of the curve.

[0031] Step 104: Generate a reverse compensation curve based on the fluctuation value curve; In step 104, the PLC controller further generates a reverse compensation curve based on the runout numerical curve plotted in step 103. This process includes analyzing the acquired runout values ​​to determine the pattern and amplitude of the roller runout. Then, based on this analysis data, the PLC controller calculates a compensation curve that can offset the runout error. This curve is similar in shape to the runout numerical curve but in the opposite direction. Therefore, during the actual calendering process, the servo motor adjusts the screw of the first roller according to the reverse compensation curve. This ensures that the roller runout error can be effectively compensated in subsequent calendering operations, improving the thickness control accuracy of the calendered material.

[0032] Step 105: Control the servo motor to adjust the screw of the first roller according to the reverse compensation curve.

[0033] In step 105, the PLC controller precisely controls the servo motor's movement based on the reverse compensation curve generated in step 104 to adjust the screw position of the first roller. Specifically, the PLC controller converts the reverse compensation curve data into control signals for the servo motor. These signals guide the servo motor to make fine adjustments, ensuring that the screw of the first roller receives precise compensation adjustment at every rotation angle. This real-time, precise control effectively counteracts the runout error of the first roller, thereby achieving higher precision thickness control during the calendering process and improving product quality and production efficiency.

[0034] In this embodiment of the application, after controlling the servo motor to adjust the screw of the first roller according to the reverse compensation curve, the process includes: The system acquires in real-time the distance difference between a first distance sensor to the surface of the calendered sheet and a second distance sensor to the surface of the first roller; wherein the calendered sheet is located on the first roller, and the distance difference is the measured thickness of the calendered sheet. Preferably, the measured thickness of the calendered sheet is compared with a preset thickness of the calendered sheet. When the measured thickness is inconsistent with the preset thickness, the servo motor is controlled to adjust the screw of the first roller so that the thickness of the calendered sheet after calendering by the first roller and the second roller conforms to the preset thickness.

[0035] In this embodiment, after adjusting the precision of the calender in the early stage, the sheet material is fed into the calender for calendering to output a high-precision calendered sheet that meets the requirements. The thickness of the calendered sheet is measured in real time during the calendering process for real-time adjustment. The specific process is as follows: After the servo motor adjusts the screw of the first roller according to the reverse compensation curve, the PLC controller acquires the first distance from the first distance sensor to the surface of the calendered sheet and the second distance from the second distance sensor to the surface of the first roller in real time, and calculates the distance difference between the two. This distance difference is the measured thickness of the calendered sheet. The calendered sheet is located on the first roller. The system compares the measured thickness with the preset thickness. If the two are inconsistent, the system controls the servo motor to further adjust the screw of the first roller to ensure that the thickness of the calendered sheet meets the preset thickness requirement.

[0036] This real-time monitoring and feedback control mechanism effectively ensures the thickness accuracy of calendered sheets, further improving product quality and production efficiency. Compared to traditional three-phase asynchronous adjustable-pitch motors, the servo motor used in this application achieves more precise position and speed control, providing higher adjustment accuracy; it has a faster response speed, enabling rapid screw position adjustment; it consumes only the actual required energy during operation, significantly reducing energy consumption; it has less vibration and noise during operation, improving equipment stability and service life while reducing noise pollution; it has high reliability and stability, reducing equipment maintenance costs and downtime; and it can maintain stable operation under load changes, exhibiting good anti-interference capabilities and adaptability. By adopting a servo motor, this application not only improves the control accuracy and production efficiency of the calender but also reduces energy consumption and maintenance costs, enhancing the overall performance and reliability of the equipment.

[0037] Compared to traditional three-phase asynchronous adjustable-pitch motors, this application utilizes servo motors. Servo motors enable more precise position and speed control, providing higher adjustment accuracy and ensuring smaller thickness tolerances for calendered sheets. Their rapid response characteristics allow servo motors to quickly execute PLC controller commands and adjust the screw position promptly, thus better adapting to dynamic changes during the calendering process. Furthermore, servo motors consume only the actual energy required during operation, significantly reducing energy consumption and improving energy efficiency. Simultaneously, their low vibration and noise characteristics contribute to improved equipment stability and lifespan, reducing maintenance needs. The high reliability and stability of servo motors further reduce equipment maintenance costs and downtime, enhancing production continuity and efficiency. Finally, the excellent dynamic performance of servo motors allows them to maintain stable operation even under varying loads, demonstrating superior anti-interference capabilities and adaptability. In summary, this application upgrades traditional three-phase asynchronous adjustable-pitch motors to servo motors, not only improving the control accuracy and production efficiency of the calendering machine but also achieving energy saving, consumption reduction, and a comprehensive upgrade in equipment performance.

[0038] like Figure 2 As shown, this application also provides a high-precision adjustment device for a calender, characterized in that it includes: A rotational speed acquisition unit is used to acquire the rotational speed of at least one first roller and at least one second roller in real time; The judgment unit is used to determine whether the rotational speed of the first roller is consistent with the rotational speed of the second roller; An angle acquisition unit is used to acquire the rotation angle of at least one of the first rollers in real time when the rotation speed of the first roller is the same as that of the second roller. The data acquisition unit is used to acquire the surface runout value for each rotation angle when the first roller is in an idling state; The control unit is used to plot the surface runout curve of the movable roller based on the rotation angle and the runout value, and generate a reverse compensation curve based on the runout curve. A servo motor unit is used to control the servo motor to adjust the screw of the first roller according to the reverse compensation curve.

[0039] In this embodiment, the precision control of the calender is achieved by setting up a speed acquisition unit, a judgment unit, an angle acquisition unit, a data acquisition unit, a control unit, and a servo motor unit. Through the coordinated work of each unit, the roller speed, rotation angle, and surface runout value are monitored in real time, a runout curve is plotted, and a reverse compensation curve is generated. Then, the servo motor adjusts the roller screw according to the curve, which effectively compensates for the initial precision error of the new calender and the wear error after long-term use. This achieves high-precision control of the thickness of the calendered product, significantly improves product quality and production efficiency, reduces the defect rate and production cost, and enhances the stability and reliability of the equipment.

[0040] In this embodiment, the angle acquisition unit is coaxially arranged with the first roller. The rotor part of the angle sensor is directly fixed to the drive end journal of the first roller through a shrink sleeve, so that its rotation axis coincides with the roller axis. The stator part of the sensor is rigidly fixed to the bearing seat end cover or the frame, keeping it stationary. When the roller rotates, the angle sensor synchronously outputs an angle signal without gaps or slippage, which can read the actual rotation angle of the roller in real time and accurately, achieving continuous high-precision acquisition from 0° to 360°. The acquired rotation angle is synchronously sent to the PLC controller, enabling the PLC controller to obtain the rotation angle of the first roller in real time. At the same time, the sensor is located inside the roller, without occupying additional external space, which facilitates the compact design of the whole machine, and is easy to seal and prevent dust, thus extending its service life.

[0041] Referring to the embodiments in this application, such as Figure 3The data acquisition unit includes a lever structure 3 and an electronic dial indicator 4, which is detachably mounted on the lever structure 3. The lever structure 3 includes a support base 31 and a lever 32. One end of the lever 32 is located between the first roller 1 and the second roller 2, and abuts against the surface of the first roller 1. When the surface of the first roller 1 jumps, the lever end abutting against the surface of the first roller 1 will also jump. The electronic dial indicator 4 mounted on the lever structure can acquire the jump value of the surface of the first roller 1 in real time and synchronize the jump value to the PLC controller. The PLC controller uses the obtained rotation angle and the corresponding jump value to draw the surface jump value curve of the first roller, so that a reverse compensation curve can be drawn based on the jump value curve. Based on the reverse compensation curve, the screw of the first roller is adjusted, which effectively compensates for the initial accuracy error of the new calender and the wear error after long-term use, and realizes high-precision control of the thickness of the calendered product.

[0042] In this embodiment, a first distance sensor and a second distance sensor are used. The first distance sensor acquires a first distance from the first distance sensor to the surface of the calendered sheet in real time, and the second distance sensor acquires a second distance from the second distance sensor to the surface of the first roller in real time. The calendered sheet is located on the first roller, and the difference between the first distance and the second distance is the measured thickness of the calendered sheet.

[0043] In this embodiment of the application, the measured thickness of the calendered sheet is compared with the preset thickness of the calendered sheet. When the measured thickness is inconsistent with the preset thickness, the servo motor unit controls the servo motor to adjust the screw of the first roller so that the thickness of the calendered sheet after calendering through the first roller and the second roller conforms to the preset thickness.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision adjustment method for a calender, characterized in that, include: The rotational speeds of at least one first roller and at least one second roller are acquired in real time. When the rotational speed of the first roller is the same as that of the second roller: the rotational angle of at least one first roller is acquired in real time, and the surface runout value of each rotational angle of the first roller in the idling state; Based on the rotation angle and the runout value, plot the surface runout value curve of the first roller; A reverse compensation curve is generated based on the fluctuation value curve; The servo motor is controlled to adjust the screw of the first roller according to the reverse compensation curve.

2. The high-precision adjustment method for a calender according to claim 1, characterized in that, Based on the rotation angle and the runout value, a runout value curve for the surface of the first roller is plotted, including: The obtained rotation angle and the jump value are output according to a preset rule, and the corresponding jump value of the first roller at each specified rotation angle is output. Based on the specified rotation angle and the corresponding runout value, a surface runout curve of the first roller at the specified rotation angle is plotted.

3. The high-precision adjustment method for a calender according to claim 2, characterized in that, include: The preset rule is to divide the rotation angle of the first roller acquired in real time into equal parts according to the measurement requirements to obtain the corresponding specified rotation angle.

4. The high-precision adjustment method for a calender according to claim 1, characterized in that, After controlling the servo motor to adjust the screw of the first roller according to the reverse compensation curve, the process includes: The distance difference between the first distance sensor to the surface of the calendered sheet and the second distance sensor to the surface of the first roller is acquired in real time; wherein the calendered sheet is located on the first roller, and the distance difference is the measured thickness of the calendered sheet.

5. The high-precision adjustment method for a calender according to claim 4, characterized in that, include: The measured thickness of the calendered sheet is compared with the preset thickness of the calendered sheet. When the measured thickness is inconsistent with the preset thickness, the servo motor is controlled to adjust the screw of the first roller so that the thickness of the calendered sheet after calendering through the first roller and the second roller conforms to the preset thickness.

6. A high-precision adjustment device for a calender, characterized in that, include: A rotational speed acquisition unit is used to acquire the rotational speed of at least one first roller and at least one second roller in real time; The judgment unit is used to determine whether the rotational speed of the first roller is consistent with the rotational speed of the second roller; An angle acquisition unit is used to acquire the rotation angle of at least one of the first rollers in real time when the rotation speed of the first roller is the same as that of the second roller. The data acquisition unit is used to acquire the surface runout value for each rotation angle when the first roller is in an idling state; The control unit is used to plot the surface runout curve of the movable roller based on the rotation angle and the runout value, and generate a reverse compensation curve based on the runout curve. A servo motor unit is used to control the servo motor to adjust the screw of the first roller according to the reverse compensation curve.

7. The high-precision adjustment device for a calender according to claim 6, characterized in that, include: The angle acquisition unit is coaxially arranged with the first roller.

8. The high-precision adjustment device for a calender according to claim 6, characterized in that, include: The data acquisition unit includes a lever structure and an electronic dial indicator. The electronic dial indicator is detachably mounted on the lever structure. The lever structure includes a support base and a lever. One end of the lever is located between the first roller and the second roller and abuts against the surface of the first roller.

9. The high-precision adjustment device for a calender according to claim 6, characterized in that, include: A first distance sensor and a second distance sensor are used. The first distance sensor acquires a first distance from the first distance sensor to the surface of the calendered sheet in real time, and the second distance sensor acquires a second distance from the second distance sensor to the surface of the first roller in real time. The calendered sheet is located on the first roller, and the difference between the first distance and the second distance is the measured thickness of the calendered sheet.

10. The high-precision adjustment device for a calender according to claim 9, characterized in that, include: The measured thickness of the calendered sheet is compared with the preset thickness of the calendered sheet. When the measured thickness is inconsistent with the preset thickness, the servo motor unit controls the servo motor to adjust the screw of the first roller so that the thickness of the calendered sheet after calendering through the first roller and the second roller conforms to the preset thickness.

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