Rolling thickness control method and device, electronic equipment and storage medium
The method addresses thickness inconsistencies in roll pressing by using historical data and real-time force adjustments to align roll pressing force with target values, improving precision and efficiency in lithium-ion battery production.
Patent Information
- Application Number
- CN202510482223.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2025-07-15
AI Technical Summary
During the production process of lithium-ion batteries, the thickness of the cross position of new and old materials during rolling replacement of roller presses suddenly changes. The existing methods cannot quickly level the roller thickness, resulting in the thickness not meeting the requirements.
After the rolling press is replaced, the rolling seam parameters are adjusted to the preset rolling seam value, and the deviation between the real-time rolling force and the target rolling force is used for secondary adjustment, and the closed-loop adjustment is carried out in combination with the PID controller until the rolling force is consistent with the target, and the rolling force is quickly adjusted.
It realizes efficient leveling of roller pressure thickness, improves control accuracy, avoids thickness deviation caused by mechanical factors, and ensures stability and consistency of roller pressure thickness.
Smart Images
Figure CN120306407A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of lithium battery manufacturing equipment, and particularly relates to a method, device, electronic device and storage medium for controlling the rolling thickness. Background Art
[0002] With the rapid development of the new energy industry, lithium-ion batteries have been widely used in fields such as electric vehicles and energy storage. In the production process of lithium-ion batteries, the rolling process is a key link in the formation of electrode sheets. During the rolling process, the rolling gap or rolling force of the rolling machine is usually controlled to produce electrode sheets with a specific thickness.
[0003] The inventor found that the following problems exist in the current rolling process: during the roll change operation of the rolling machine, usually, the new roll of material is not waited to be completely processed before putting in the new roll of material. Instead, when there is still a part of the old roll of material left, the initial position of the new roll of material is overlapped with the end position of the old roll of material, and the power of processing the old roll of material is used to drive the new roll of material into the rolling machine. This results in a sudden change in the thickness of the material at the position where the new and old materials cross. If the previous rolling parameters are still used, it cannot be guaranteed that the rolling thickness meets the requirements. And the current closed-loop control method for rolling thickness cannot achieve a rapid thickness leveling effect for this sudden change in material thickness. Summary of the Invention
[0004] The purpose of the embodiments of the present invention is to provide a method, device, electronic device and storage medium for controlling the rolling thickness. By using the preset rolling gap value adjustment and adding a secondary adjustment method for indirectly determining the rolling gap parameter adjustment value through the target rolling force, the rolling gap parameters of the rolling machine are quickly adjusted to the ideal value that can process the material with the required thickness, achieving a more efficient thickness leveling effect.
[0005] To solve the above technical problems, the embodiments of the present invention provide a method for controlling the rolling thickness, including: after detecting that the rolling machine has a roll change action, adjusting the current rolling gap parameters of the rolling machine to a preset rolling gap value; wherein, the preset rolling gap value is the ideal rolling gap value after historical acquisition of the roll change action; detecting the real-time rolling force of the rolling machine under the preset rolling gap value; according to the deviation between the real-time rolling force and the target rolling force, re-adjusting the rolling gap parameters of the rolling machine until the rolling force of the adjusted rolling machine is the same as the target rolling force, and operating the rolling machine.
[0006] An embodiment of the present invention also provides a control device for the rolling thickness, including: a primary adjustment module, configured to adjust the current roll gap parameter of the rolling press to a preset roll gap value after detecting that the rolling press performs a roll change operation; wherein, the preset roll gap value is an ideal roll gap value collected historically after the roll change operation; a detection module, configured to detect the real-time rolling force of the rolling press under the condition of the preset roll gap value; a secondary adjustment module, configured to adjust the roll gap parameter of the rolling press again according to the deviation between the real-time rolling force and the target rolling force until the rolling force of the adjusted rolling press is the same as the target rolling force, and operate the rolling press.
[0007] An embodiment of the present invention also provides an electronic device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned control method for the rolling thickness.
[0008] An embodiment of the present invention also provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the above-mentioned control method for the rolling thickness is implemented.
[0009] Compared with the prior art, in the embodiment of the present invention, after detecting that the rolling press performs a roll change operation, the current roll gap parameter of the rolling press is adjusted to a preset roll gap value as the first adjustment of the roll gap parameter. When there is a deviation between the real-time rolling force and the target rolling force, the roll gap parameter of the rolling press is adjusted again according to the deviation until the rolling force of the adjusted rolling press is the same as the target rolling force, and the rolling press is operated. Through two different adjustment methods, the adjustment behavior of the position-mode rolling press is expanded, and the roll gap parameter of the rolling press is quickly adjusted to the ideal value that can process materials with the required thickness, realizing a more efficient thickness leveling effect. And the roll gap parameter is indirectly adjusted by using the rolling force, improving the control accuracy of the position-mode rolling press for the rolling thickness and avoiding the problem that the rolling thickness deviates from the ideal thickness due to mechanical factors.
[0010] In addition, adjusting the roll gap parameter of the rolling press again according to the deviation between the real-time rolling force and the target rolling force includes: performing a closed-loop adjustment on the roll gap parameter of the rolling press through a PID controller.
[0011] In addition, performing a closed-loop adjustment on the roll gap parameter of the rolling press through a PID controller includes: performing a closed-loop control on the roll gap parameter by using the PID formula, and the PID formula is: wherein, u represents the adjustment amount of the roll gap parameter, K p represents the proportional parameter, K i represents the integral parameter, K dδ represents the differential parameter, and e represents the difference between the target rolling force and the real-time rolling force.
[0012] In addition, operating the roll press includes: a low-speed operation stage and a high-speed operation stage; after the rolling force of the adjusted roll press is the same as the target rolling force, entering the low-speed operation stage of the roll press; detecting the roll pressing thickness during the low-speed operation stage; and entering the high-speed operation stage of the roll press after the roll pressing thickness meets the preset requirements.
[0013] In addition, the low-speed operation stage is when the roll pressing output speed is less than or equal to 20 m / min, and the high-speed operation stage is when the roll pressing output speed is greater than or equal to 100 m / min.
[0014] In addition, during the low-speed operation stage of the roll press, it further includes: real-time collecting the roll gap parameters and the rolling force during the low-speed operation stage of the roll press; averaging the roll gap parameters and the rolling force collected during the low-speed operation stage to obtain the average roll gap parameters and the average rolling force; updating the preset roll gap value using the average roll gap parameters, and updating the target rolling force using the average rolling force.
[0015] In addition, averaging the roll gap parameters and the rolling force collected during the low-speed operation stage includes: averaging the roll gap parameters collected during the low-speed operation stage using the calculation formula for the average roll gap parameters, and the calculation formula for the average roll gap parameters is: where A * represents the average roll gap parameter, N is the number of collections, (k i A i +b i ) is the corrected roll gap parameter after correcting the roll gap parameter collected in the i-th collection, A i represents the actual roll gap parameter collected in the i-th collection, k i and b i are the correction coefficients of the roll gap parameter, k i and b i are determined based on the operating speed of the roll press, k1 represents the first correction ratio, and b1 represents the first correction error; averaging the rolling force collected during the low-speed operation stage using the calculation formula for the average rolling force, and the calculation formula for the average rolling force is: B * represents the average rolling force, N is the number of collections, (k’ i B i +b’ i ) is the corrected rolling force after correcting the rolling force collected in the i-th collection. B i represents the actual rolling force collected in the i-th collection, k’ i and b’ i are the correction coefficients of the rolling force, k’ i and b’i Determined based on the operating speed of the roll press, k' i represents the second correction ratio, b' i represents the second correction error. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the figures in the drawings do not constitute a proportional limitation.
[0017] Figure 1 is a flowchart of the method for controlling the roll pressing thickness according to an embodiment of the present invention;
[0018] Figure 2 is a schematic diagram showing the comparison result between the method for controlling the roll pressing thickness according to an embodiment of the present invention and the existing control method;
[0019] Figure 3 is an overall flowchart of the method for controlling the roll pressing thickness according to an embodiment of the present invention;
[0020] Figure 4 is a schematic structural diagram of the device for controlling the roll pressing thickness according to an embodiment of the present invention;
[0021] Figure 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will elaborate on each embodiment of the present invention in detail with reference to the drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are provided to help the reader better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented.
[0023] The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation manner of the present invention. The various embodiments can be combined and cross-referenced with each other on the premise of no contradiction.
[0024] Embodiments of the present invention relate to a method for controlling the rolling thickness, including: after detecting that a roll change operation occurs on a rolling press, adjusting the current roll gap parameter of the rolling press to a preset roll gap value; wherein, the preset roll gap value is the ideal roll gap value after the roll change operation collected historically; detecting the real-time rolling force of the rolling press under the condition of the preset roll gap value; and according to the deviation between the real-time rolling force and the target rolling force, readjusting the roll gap parameter of the rolling press until the rolling force of the adjusted rolling press is the same as the target rolling force, and then operating the rolling press. By using the preset roll gap value for adjustment and adding a secondary adjustment method for indirectly determining the roll gap parameter adjustment value through the target rolling force, the roll gap parameter of the rolling press can be quickly adjusted to the ideal value for processing materials with a thickness meeting the requirements, achieving a more efficient thickness leveling effect. The implementation details of the method for controlling the rolling thickness in this embodiment are specifically described below. The following content is only the implementation details provided for convenient understanding and is not necessary for implementing this solution.
[0025] In this embodiment, the method for controlling the rolling thickness is as Figure 1 shown, and the method includes:
[0026] Step 101, after detecting that a roll change operation occurs on a rolling press, adjusting the current roll gap parameter of the rolling press to a preset roll gap value.
[0027] Specifically, when the old roll material is about to be processed completely, slowly reduce the pressure of the hydraulic system to 0 MPa. After observing that the pressure gauge returns to zero, turn off the hydraulic pump, start the lifting device (such as a hydraulic jack or a mechanical jack), expand the distance between the movable roll and the fixed roll. After lifting the movable roll to a suitable position, fix the movable roll through a safety pin or a mechanical limit device to prevent the movable roll from falling accidentally. Superimpose the initial position of the new roll of material on the end of the old roll of material, release the limit on the movable roll, restore the movable roll to its original position, and finally start the hydraulic pump to gradually increase the system pressure to the set value. At this time, the roll change operation is completed. When it is detected that the movable roll has returned to its original position and the hydraulic pump is started, it can be determined that the roll change operation is over. For a roll press in position mode, the roll pressing thickness control is achieved by changing the set value of the roll gap. After receiving the set command, the servo motor drives the rolling rolls to change their positions, and finally makes the real-time value close to the set value and maintains the positioning. The adjustment and positioning are realized by the drive algorithm inside the roll press. Therefore, after the roll change operation is completed, the current roll gap parameters of the roll press can be adjusted to the preset roll gap value through the drive algorithm. It is also possible to directly adjust the roll gap parameters to the preset roll gap value when the movable roll returns to its original position after the roll change, so that the movable roll can be directly adjusted to the preset roll gap value when it returns to the position, avoiding repeated adjustment of the roll gap. After such adjustment, the roll gap parameters are automatically adjusted to the preset roll gap value after the roll change. Here, the preset roll gap value is the ideal roll gap value collected historically after the roll change operation, rather than the roll gap value set for the old roll of material. In theory, the adjusted roll press can produce pole pieces with a pole piece thickness very close to the specified thickness during the low-speed operation stage. The adjustment process of adjusting the roll gap parameters to the preset roll gap value is an open-loop control, and there is no feedback of the roll pressing thickness in this process.
[0028] Step 102, detect the real-time rolling force of the roll press under the preset roll gap value.
[0029] Specifically, by installing a pressure sensor (such as a piezoelectric or strain gauge sensor) in the hydraulic system, monitor the pressure change of the hydraulic cylinder in real time, and calculate the real-time rolling force through a pressure-rolling force conversion model.
[0030] Step 103, according to the deviation between the real-time rolling force and the target rolling force, adjust the roll gap parameters of the roll press again until the rolling force of the adjusted roll press is the same as the target rolling force, and operate the roll press.
[0031] Specifically, since the position-mode roll press does not have a stable rolling force. For example, during the continuous production of the roll press, the rolling results at the same roll gap parameter will deviate. Besides the fluctuations in the incoming material, the reasons for this result are usually related to mechanical factors, such as changes in the driving oil pressure, oil gap, bearing friction, changes in the energy stored in the spring, deflection deformation of the rolls, etc. In addition, the "roll gap" parameter that the roll press can measure and provide is essentially the reading of the sensor on the servo track at the connecting handle at both ends of the push-pull rolls, and there is still a gap from the actual roll surface spacing in the middle of the two rolls. Therefore, in practice, it is found that if the process roll gap saved in the previous roll is directly used as the starting roll gap position for the next roll, the rolling effect will be lost, and there will be a certain gap between the thickness of the produced electrode and the target value. In contrast, the rolling force fluctuation for producing the same thickness is smaller because the proportion of external force loss in the total output of the rolling force is much smaller than the proportion of the reading error between the true gap of the roll surface and the readings of the two end transmission shafts in the total readings. Therefore, after setting the preset roll gap value, fine-tuning the real-time rolling force of the roll press with the target rolling force can make the thickness deviation of the output smaller.
[0032] When adjusting for the deviation between the real-time rolling force and the target rolling force, a method of closed-loop adjustment of the roll gap parameter of the roll press through a PID controller can be adopted. Specifically, the PID formula is used to perform closed-loop control on the roll gap parameter. The PID formula is: where, u represents the adjustment amount of the roll gap parameter, K p represents the proportional parameter, K i represents the integral parameter, K d represents the derivative parameter, and e represents the difference between the target rolling force and the real-time rolling force. The adjustment of the roll gap parameter based on the rolling force is also a control process that does not rely on thickness feedback. The above-mentioned two adjustments of the roll gap parameter are both completed when the speed is 0 after the rolls are engaged. Only after both of the above-mentioned two adjustments of the roll gap parameter are completed does the roll press start to operate.
[0033] The above two adjustments of the roll gap parameters. Among them, the adjustment amount of the roll gap parameters based on the preset roll gap value is usually much larger than that based on the target rolling force and the real-time rolling force. The adjustment amount of the roll gap parameters based on the preset roll gap value is about ten times that based on the target rolling force and the real-time rolling force. Also, since the drive of the roll is hydraulic drive, there will be strong oscillations when the oil pressure changes in a large range, and the roll press in the position mode does not have the function of constant rolling force. Therefore, if the large-stroke adjustment of the roll gap parameters based on the preset roll gap value is ignored and the roll gap is directly determined based on the target rolling force and the real-time rolling force after pressurization, the rolling force will fluctuate greatly during the adjustment process due to the large fluctuation of the oil pressure, resulting in a large fluctuation in the adjustment process of the roll gap, making it difficult to be stable and reducing the adjustment efficiency. Therefore, it is more beneficial to the stability of the roll press to perform a small-stroke adjustment after the large-stroke adjustment of the roll gap parameters based on the preset roll gap value.
[0034] Compared with the prior art, in the embodiment of the present invention, after detecting that the roll press has a roll change operation, the current roll gap parameters of the roll press are adjusted to the preset roll gap value as the first adjustment of the roll gap parameters. When there is a deviation between the real-time rolling force and the target rolling force, the roll gap parameters of the roll press are adjusted again according to the deviation until the rolling force of the adjusted roll press is the same as the target rolling force, and then the roll press is operated. Through two different adjustment methods, the adjustment behavior of the roll press in the position mode is expanded, and the roll gap parameters of the roll press are quickly adjusted to the ideal value that can process materials with the required thickness, realizing a more efficient thickness leveling effect. And the roll gap parameters are indirectly adjusted by using the rolling force, improving the control accuracy of the roll press in the position mode for the roll pressing thickness and avoiding the problem that the roll pressing thickness deviates from the ideal thickness due to mechanical factors.
[0035] After adjusting the roll gap parameters of the roll press to the appropriate roll gap parameters through the above two adjustments, the operation of the roll press is divided into a low-speed operation stage and a high-speed operation stage. After the rolling force of the adjusted roll press is the same as the target rolling force, it enters the low-speed operation stage of the roll press; the roll pressing thickness is detected in the low-speed operation stage; after the roll pressing thickness meets the preset requirements, for example, the thickness is stable and meets the thickness specification, it enters the high-speed operation stage of the roll press. The low-speed operation stage is when the roll pressing output speed is less than or equal to 20 m / min, and the high-speed operation stage is when the roll pressing output speed is greater than or equal to 100 m / min.
[0036] During the low-speed operation stage of the roll press, it further includes: real-time collecting the roll gap parameters and the rolling force in the low-speed operation stage of the roll press; performing an averaging process on the roll gap parameters and the rolling force collected in the low-speed operation stage to obtain the average roll gap parameters and the average rolling force; the calculation formula for the average roll gap parameters is: Among them, A * represents the average roll gap parameters, N is the number of collections, (k iA i +b i ) is the corrected roll gap parameter after the roll gap parameter collected for the i-th time is passed through the correction formula. A i represents the actual roll gap parameter collected for the i-th time, k i and b i are the correction coefficients of the roll gap parameter, which are determined based on the roll press operating speed corresponding to the actual roll gap parameter collected each time. The correction coefficients k i and b i used for the correction of the actual roll gap parameter collected at different roll press operating speeds are different. k i represents the first correction ratio, and b i represents the first correction error. The calculation formula for the average rolling force is: Among them, B * represents the average rolling force, N is the number of acquisitions, (k’ i B i +b’ i ) is the corrected rolling force after the rolling force collected for the i-th time is passed through the correction formula. B i represents the actual rolling force collected for the i-th time, k’ i and b’ i are the correction coefficients of the rolling force, which are determined based on the roll press operating speed corresponding to the actual rolling force collected each time. The correction coefficients k’ i and b’ i used for the correction of the actual rolling force collected at different roll press operating speeds are different. k’ i represents the second correction ratio, and b’ i represents the second correction error. The above-mentioned k’ i , b’ i , k’ i and b’ i can all be completed by experiment or manual calibration.
[0037] The above-mentioned roll gap parameter or rolling force needs to be corrected by the correction formula after collection, rather than directly calculating the average value. This is because the roll press operating speeds where the effective parameters are collected each time are different, and the difference in speed will affect the difference in rolling results (such as affecting the strain rate, etc.). Therefore, it is necessary to correct and inversely deduce the roll gap parameter and rolling force corresponding to their respective initial stages (pressurization stage, speed = 0) so that the collected data can be averaged under the condition of unified working conditions.
[0038] Finally, the preset roll gap value is updated using the average roll gap parameter, and the target rolling force is updated using the average rolling force.
[0039] According to the real production line data, compare the suppression effects of this solution and the existing old solution on the thickness fluctuation of the roll-changing headstock material asFigure 2 As shown, taking the index positioning of the old solution as 100% as an example, it can be clearly seen that the average thickness fluctuation of the first 30 meters after roll change in this solution is smaller, and the number of meters required to reach the thickness specification for the first time after roll change is smaller. Compared with the existing solution, it has a better effect on thickness leveling.
[0040] The overall implementation process of this solution is described as follows: As Figure 3 shown, in the preparatory roll change stage, the roll press releases pressure to lift the rolls, assembles a new roll. After the splicing tape passes through the rolls, the preset roll gap value A and the target rolling force B are read. The roll press pressurizes and lowers the rolls to complete the assembly of the new roll. The roll gap parameters of the roll press are adjusted for the first time to adjust the roll gap parameters of the roll press to the preset roll gap value A. Then, the roll gap parameters of the roll press are adjusted for the second time. By adjusting the roll gap, the rolling force reaches the target rolling force B, completing the adjustment of the roll gap parameters. The roll press enters the low-speed operation stage. If the thickness is detected to be qualified during the low-speed operation stage, the roll press is controlled to enter the high-speed operation stage until the production ends. During the low-speed operation stage, it is also necessary to collect the real-time roll gap parameters and the real-time rolling force, and update the preset roll gap value A and the target rolling force B based on the real-time roll gap parameters and the real-time rolling force. Even if there is a product changeover during the production process, adaptive parameter updates can be performed, reducing the maintenance requirements caused by equipment aging or working condition changes. The robustness of the self-update algorithm is relatively good. In addition, the above-mentioned fast leveling algorithm described in the present invention is based on simple on-site parameter fitting and correction, and has the advantages of high reliability and small calculation load.
[0041] The step division of the above various methods is only for clear description. When implemented, they can be combined into one step or some steps can be split into multiple steps. As long as they include the same logical relationship, they are all within the protection scope of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs, but not changing the core design of its algorithm and process are all within the protection scope of this patent.
[0042] The embodiment of the present invention also relates to a control device for roll pressing thickness, as Figure 4 shown, including: a primary adjustment module 41, used to adjust the current roll gap parameters of the roll press to the preset roll gap value after detecting that the roll press has a roll change action; wherein, the preset roll gap value is the ideal roll gap value collected historically after the roll change action; a detection module 42, used to detect the real-time rolling force of the roll press under the condition of the preset roll gap value; a secondary adjustment module 43, used to adjust the roll gap parameters of the roll press again according to the deviation between the real-time rolling force and the target rolling force until the rolling force of the adjusted roll press is the same as the target rolling force, and operate the roll press.
[0043] In addition, the secondary adjustment module 43 is used to perform closed-loop adjustment on the roll gap parameters of the roll press through a PID controller.
[0044] In addition, a secondary adjustment module 43 is used to perform closed-loop control on the roll gap parameters by using a PID formula. The PID formula is as follows: where u represents the adjustment amount of the roll gap parameters, K p represents the proportional parameter, K i represents the integral parameter, K d represents the derivative parameter, and e represents the difference between the target rolling force and the real-time rolling force.
[0045] In addition, the operating roll press includes a low-speed operation stage and a high-speed operation stage. After the rolling force of the adjusted roll press is the same as the target rolling force, it enters the low-speed operation stage of the roll press. The roll pressing thickness is detected in the low-speed operation stage. After the roll pressing thickness meets the preset requirements, it enters the high-speed operation stage of the roll press. The low-speed operation stage is when the roll pressing output speed is less than or equal to 20 m / min, and the high-speed operation stage is when the roll pressing output speed is greater than or equal to 100 m / min.
[0046] In addition, the control device for the roll pressing thickness further includes an update module, which is used to, during the low-speed operation stage of the roll press, collect the roll gap parameters and the rolling force in the low-speed operation stage of the roll press in real time; perform averaging processing on the roll gap parameters and the rolling force collected in the low-speed operation stage to obtain the average roll gap parameters and the average rolling force; update the preset roll gap value by using the average roll gap parameters, and update the target rolling force by using the average rolling force.
[0047] In addition, performing averaging processing on the roll gap parameters and the rolling force collected in the low-speed operation stage includes: performing averaging processing on the roll gap parameters collected in the low-speed operation stage by using the calculation formula for the average roll gap parameters. The calculation formula for the average roll gap parameters is as follows: where A * represents the average roll gap parameters, N is the number of acquisitions, (k i A i +b i ) is the corrected roll gap parameter after correcting the roll gap parameter acquired for the i-th time, A i represents the actual roll gap parameter acquired for the i-th time, k i and b i are the correction coefficients of the roll gap parameters, k i and b i are determined based on the operating speed of the roll press, k1 represents the first correction ratio, and b1 represents the first correction error; performing averaging processing on the rolling force collected in the low-speed operation stage by using the calculation formula for the average rolling force. The calculation formula for the average rolling force is as follows: B * represents the average rolling force, N is the number of acquisitions, (k’ i B i +b’ i) is the corrected rolling force after correcting the rolling force collected in the i-th time. B i represents the actual rolling force collected in the i-th time, k’ i and b’ i are the correction coefficients of the rolling force, k’ i and b’ i are determined based on the operating speed of the roller press, k’ i represents the second correction ratio, b’ i represents the second correction error.
[0048] It is worth mentioning that each module involved in this embodiment is a logic module. In practical applications, a logic unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, units that are not closely related to solving the technical problems proposed by the present invention are not introduced in this embodiment, but this does not mean that there are no other units in this embodiment.
[0049] This embodiment can be implemented in cooperation with the above method embodiment. The relevant technical details mentioned in the method embodiment are still valid in this embodiment. To avoid repetition, they are not described here again. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied to the above method embodiment.
[0050] An embodiment of the present invention relates to an electronic device, such as Figure 5 shown, including: at least one processor 501; and a memory 502 communicatively connected to the at least one processor 501; wherein, the memory 502 stores instructions executable by the at least one processor 501, and the instructions are executed by the at least one processor 501 to enable the at least one processor 501 to execute the above method for controlling the rolling thickness.
[0051] Among them, the memory and the processor are connected by a bus. The bus can include any number of interconnected buses and bridges. The bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits together, which are well known in the art. Therefore, they are not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be an element or multiple elements, such as multiple receivers and transmitters, and provides a unit for communicating with various other devices on the transmission medium. The data processed by the processor is transmitted over the wireless medium through the antenna. Further, the antenna also receives data and transmits the data to the processor.
[0052] The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory can be used to store the data used by the processor when executing operations.
[0053] An embodiment of the present invention relates to a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method embodiments described above are implemented.
[0054] That is, those skilled in the art can understand that all or part of the steps of implementing the methods in the above embodiments can be completed by instructing relevant hardware through a program. The program is stored in a storage medium and includes several instructions for causing a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs.
[0055] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.
Claims
1. A method for controlling the thickness of roll pressing, characterized in that, Including: After detecting that the roll press has a roll change operation, adjusting the current roll gap parameter of the roll press to a preset roll gap value; Wherein, the preset roll gap value is the ideal roll gap value after the roll change operation collected historically; Detecting the real-time rolling force of the roll press under the preset roll gap value; According to the deviation between the real-time rolling force and the target rolling force, readjusting the roll gap parameter of the roll press until the rolling force of the adjusted roll press is the same as the target rolling force, and operating the roll press.
2. The control method for the rolling thickness according to claim 1, characterized in that, The readjusting the roll gap parameter of the roll press according to the deviation between the real-time rolling force and the target rolling force includes: Performing a closed-loop adjustment on the roll gap parameter of the roll press through a PID controller.
3. The control method for the rolling thickness according to claim 2, wherein The performing a closed-loop adjustment on the roll gap parameter of the roll press through a PID controller includes: Performing a closed-loop control on the roll gap parameter by using a PID formula, and the PID formula is: Among them, u represents the adjustment amount of the roll gap parameter, K p represents the proportional parameter, K i represents the integral parameter, K d represents the differential parameter, and e represents the difference between the target rolling force and the real-time rolling force.
4. The control method for rolling thickness according to claim 1, wherein The operating the roll press includes: a low-speed operation stage and a high-speed operation stage; After the rolling force of the adjusted roll press is the same as the target rolling force, entering the low-speed operation stage of the roll press; Detecting the roll pressing thickness in the low-speed operation stage; After the roll pressing thickness meets the preset requirements, entering the high-speed operation stage of the roll press.
5. The control method of the rolling thickness according to claim 4, wherein The low-speed operation stage is that the roll pressing output speed is less than or equal to 20 m / min, and the high-speed operation stage is that the roll pressing output speed is greater than or equal to 100 m / min.
6. The control method for the rolling thickness according to claim 4, characterized in that, When in the low-speed operation stage of the roll press, it further includes: Real-time collecting the roll gap parameter and the rolling force in the low-speed operation stage of the roll press; Performing an averaging process on the roll gap parameter and the rolling force collected in the low-speed operation stage to obtain an average roll gap parameter and an average rolling force; Updating the preset roll gap value by using the average roll gap parameter, and updating the target rolling force by using the average rolling force.
7. The control method for the rolling thickness according to claim 6, characterized in that, The performing an averaging process on the roll gap parameter and the rolling force collected in the low-speed operation stage includes: Performing an averaging process on the roll gap parameter collected in the low-speed operation stage by using a calculation formula for the average roll gap parameter, and the calculation formula for the average roll gap parameter is: Among them, A * represents the average roll gap parameter, N is the number of acquisitions, (k i A i +b i ) is the corrected roll gap parameter after correcting the roll gap parameter of the i-th acquisition, A i represents the actual roll gap parameter of the i-th acquisition, k i and b i are the correction coefficients of the roll gap parameter, k i and b i are determined based on the operating speed of the roll press, k1 represents the first correction ratio, and b1 represents the first correction error; The rolling force collected during the low-speed operation stage is averaged using the calculation formula for the average rolling force. The calculation formula for the average rolling force is as follows: B * represents the average rolling force, N is the number of acquisitions, (k i B i +b i ) is for the i-th The corrected rolling force after the rolling force collected for the first time is corrected; B i represents the actual rolling force collected for the i-th time, k i and b i is for rolling Correction coefficient of force, k i and b i Determined based on the operating speed of the roller press, k i Represents the second correction ratio, b i Represents the second correction error.
8. A control device for the thickness of roll pressing, characterized in that, Including: A primary adjustment module, configured to, after detecting that the roll press has a roll change operation, adjust the current roll gap parameter of the roll press to a preset roll gap value; wherein, the preset roll gap value is the ideal roll gap value after the roll change operation collected historically; A detection module, configured to detect the real-time rolling force of the roll press under the preset roll gap value; A secondary adjustment module, configured to, according to the deviation between the real-time rolling force and the target rolling force, readjust the roll gap parameter of the roll press until the rolling force of the adjusted roll press is the same as the target rolling force, and operate the roll press.
9. An electronic device, characterized in that, Including: At least one processor; And, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the control method for the roll pressing thickness as described in any one of claims 1 to 7.
10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method for the roll pressing thickness as described in any one of claims 1 to 7.