A diaphragm thickness control method, device, equipment and readable storage medium

Abstract

The application relates to the technical field of multi-roll continuous rolling control, and discloses a diaphragm thickness control method, device, equipment and readable storage medium, which comprises the following steps: determining roll gap setting values between rollers at all levels in a multi-roll rolling structure according to a target diaphragm thickness and film forming process parameters; calculating corresponding rolling forces at all levels based on the roll gap setting values at all levels and rolling process parameters; determining corresponding cylinder control parameters at all levels according to the rolling forces at all levels; driving cylinders at all levels to apply pressure to the diaphragm based on the cylinder control parameters at all levels, comparing an actual diaphragm thickness with the target diaphragm thickness, and obtaining thickness deviations corresponding to all levels; and adjusting the roll gap setting values at all levels or the cylinder control parameters at all levels according to the thickness deviations corresponding to all levels, so that the diaphragm thickness meeting preset requirements is obtained. The method significantly improves the control efficiency of the multi-roll continuous rolling system and the consistency of product quality.

Description

Technical Field

[0001] This application relates to the field of multi-roll continuous rolling control technology, and in particular to a film thickness control method, apparatus, equipment and readable storage medium. Background Technology

[0002] Lithium-ion batteries, as the mainstream energy storage devices, are widely used in new energy vehicles, consumer electronics, and energy storage systems. The manufacturing of battery electrodes is one of the key steps in the lithium-ion battery production process. After coating, the electrode film needs to be compacted through a multi-stage rolling process to achieve the target thickness and areal density required by the design. In traditional processes, film rolling typically employs a multi-stage continuous rolling mill, gradually reducing the gap between the rollers to achieve film thinning and compaction. During this process, the compaction ratio and areal density are two key parameters for measuring film quality. The compaction ratio is usually defined as the ratio of the thickness before rolling to the thickness after rolling, while the areal density represents the mass of the film per unit area.

[0003] In existing technologies, roll gap adjustment primarily relies on wedge structures, with each level of roll gap being continuously adjusted manually or automatically during equipment operation to control the final film thickness and areal density. However, in multi-roll continuous rolling systems, the inter-coupling influence between different roll gap levels means that adjusting a single level often has a complex impact on the overall rolling effect, making the adjustment process cumbersome and difficult to control precisely. Furthermore, roll gap monitoring typically relies on high-precision sensors, but due to factors such as mechanical deformation and assembly errors, the roll gap values ​​measured by the sensors often deviate from the actual values, further increasing the difficulty of adjustment and the uncertainty of control accuracy. Therefore, in actual production, operators often need to adjust the gap through repeated trial and error, which is not only inefficient but also prone to material waste and product quality fluctuations. Summary of the Invention

[0004] In view of this, embodiments of this application provide a diaphragm thickness control method, apparatus, device, and readable storage medium, which can effectively solve the problems of low diaphragm thickness control accuracy, complex adjustment, reliance on high-precision roll gap sensors, and high equipment cost in the prior art during multi-roll rolling.

[0005] In a first aspect, embodiments of this application provide a method for controlling diaphragm thickness, including: Obtain the target film thickness and film formation process parameters, and determine the roll gap setting value between each stage of the multi-roll rolling structure based on the target film thickness and the film formation process parameters; Based on the roll gap settings and rolling process parameters for each stage, calculate the rolling force corresponding to each stage; The corresponding hydraulic cylinder control parameters for each stage are determined based on the rolling force described at each stage. Based on the control parameters of each level of the hydraulic cylinder, each level of the hydraulic cylinder is driven to apply pressure to the diaphragm, and the actual diaphragm thickness detected in real time is compared with the target diaphragm thickness to obtain the thickness deviation corresponding to each level; Adjust the roller gap setting value or the hydraulic cylinder control parameter at each stage according to the thickness deviation at each stage to obtain a film thickness that meets the preset requirements.

[0006] In some embodiments, obtaining the target film thickness and film-forming process parameters, and determining the roll gap setting value between each stage of the multi-roll rolling structure based on the target film thickness and the film-forming process parameters, includes: Obtain the preset target film thickness and film formation process parameters for the multi-roll rolling structure to be processed; A material deformation relationship model is established between the target film thickness and the film formation process parameters; Based on the material deformation relationship model and the number of stages of the multi-roll rolling structure, the roll gap setting value corresponding to each stage of the rolls is calculated.

[0007] In some embodiments, calculating the rolling force corresponding to each stage based on the roll gap settings and rolling process parameters includes: Obtain the film thickness value corresponding to the roll gap setting value at each level; Obtain the rolling process parameters corresponding to the thickness values ​​of the diaphragms at each stage; A unified rolling force model is established based on the diaphragm thickness values ​​and rolling process parameters at each level; By inputting the roll gap setting values ​​and rolling process parameters of each level into the unified rolling force model, the rolling force corresponding to the roll gap setting values ​​of each level is obtained.

[0008] In some embodiments, determining the corresponding cylinder control parameters for each rolling force includes: Substituting the rolling forces at each level into a preset mechanical equilibrium model, the hydraulic cylinder control parameters corresponding to the rolling forces at each level are obtained.

[0009] In some embodiments, the step of driving each level of the hydraulic cylinder to apply pressure based on the control parameters of each level of the hydraulic cylinder, and comparing the real-time detected actual diaphragm thickness with the target diaphragm thickness to obtain the thickness deviation corresponding to each level includes: The control parameters of each level of the hydraulic cylinder are mapped to each level of the hydraulic cylinder, and the hydraulic cylinders at each level are driven to apply pressure according to the control parameters of the hydraulic cylinder; The diaphragm thickness is detected under pressure applied by each level of the hydraulic cylinder to obtain the actual diaphragm thickness. The actual diaphragm thickness is compared with the target diaphragm thickness to obtain the thickness deviation corresponding to each level.

[0010] In some embodiments, adjusting the roll gap setting value or the hydraulic cylinder control parameter at each stage according to the thickness deviation at each stage to obtain a film thickness that meets preset requirements includes: The set values ​​of the roller gaps at each level or the control parameters of the hydraulic cylinders at each level are adjusted based on the thickness deviation to obtain a film thickness that meets the preset accuracy requirements.

[0011] In some embodiments, adjusting the set values ​​of the roll gaps at each stage or the control parameters of the hydraulic cylinders at each stage based on the thickness deviation further includes: Adjust the set values ​​of the roll gaps at each level or the control parameters of the hydraulic cylinders at each level based on the current thickness deviation; After adjustment, the membrane thickness is re-detected and a new thickness deviation is calculated to obtain a thickness deviation that is less than the preset thickness error threshold.

[0012] Secondly, embodiments of this application provide a diaphragm thickness control device, comprising: The parameter setting module is used to obtain the target film thickness and film formation process parameters, and determine the roll gap setting value between each level of the rolls in the multi-roll rolling structure based on the target film thickness and the film formation process parameters. The rolling force calculation module is used to calculate the rolling force corresponding to each stage based on the roll gap setting value and rolling process parameters of each stage; The parameter determination module is used to determine the corresponding hydraulic cylinder control parameters for each stage based on the rolling force described at each stage. The thickness acquisition module is used to drive each level of the hydraulic cylinder to apply pressure to the diaphragm based on the control parameters of each level of the hydraulic cylinder, and compare the real-time detected actual diaphragm thickness with the target diaphragm thickness to obtain the thickness deviation corresponding to each level; The adjustment module is used to adjust the roll gap setting value or the hydraulic cylinder control parameter of each stage according to the thickness deviation of each stage, so as to obtain a film thickness that meets the preset requirements.

[0013] Thirdly, embodiments of this application provide a terminal device, the terminal including a processor and a memory, the memory storing a computer program, and the processor executing the computer program to implement the film thickness control method of the first aspect described above.

[0014] Fourthly, embodiments of this application provide a computer-readable storage medium, wherein when the computer program is executed on a processor, it implements the film thickness control method of the first aspect described above.

[0015] The embodiments of this application have the following beneficial effects: By obtaining the target diaphragm thickness and film-forming process parameters, and accordingly determining the roll gap setting values ​​between each level of rolls in the multi-roll rolling structure, a systematic modeling and parameter preset of the diaphragm rolling process is achieved; after determining the roll gap setting values ​​for each level, the corresponding rolling force is calculated in combination with the rolling process parameters, and further, the control parameters of each level of hydraulic cylinder are derived based on the rolling force at each level, enabling the control system to indirectly adjust the roll gap through the hydraulic cylinder pressure, avoiding the mechanical complexity and response lag problems of the traditional wedge adjustment method; by driving each level of hydraulic cylinder to apply pressure to the diaphragm according to the calculated control parameters, and detecting the diaphragm thickness in real time at the discharge end, the deviation between the actual diaphragm thickness and the target thickness is obtained; based on this deviation, the roll gap setting value or hydraulic cylinder control parameters are dynamically adjusted, forming a feedback control mechanism, which effectively improves the accuracy and stability of diaphragm thickness control. This method does not rely on high-precision roll gap measurement sensors, reducing equipment costs and maintenance difficulty, while possessing good adaptive capabilities, able to cope with changes in diaphragm material properties and equipment operating errors, significantly improving the control efficiency and product quality consistency of the multi-roll continuous rolling system, and has good engineering practicality and promotion value. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart of a diaphragm thickness control method according to an embodiment of this application is shown; Figure 2 This diagram illustrates the multi-roll rolling film thinning method in the film thickness control method of this application. Figure 3 This diagram illustrates the relationship between diaphragm thickness and rolling force in the diaphragm thickness control method according to an embodiment of this application. Figure 4 A schematic diagram illustrating the mechanical effects on the multi-roll rolling structure in the diaphragm thickness control method of this application embodiment is shown; Figure 5 This illustration shows a schematic diagram of the method for controlling the force of the hydraulic cylinders between rollers at each stage by controlling the output film thickness in the film thickness control method of this application embodiment; Figure 6 A schematic diagram of a diaphragm thickness control method according to an embodiment of this application is shown. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0019] The components of the embodiments of this application described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] In the following text, the terms "comprising," "having," and their cognates, which may be used in various embodiments of this application, are intended only to indicate a particular feature, number, step, operation, element, component, or combination thereof, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, or adding the possibility of one or more combinations thereof. Furthermore, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0021] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this application pertain. Terms (such as those defined in commonly used dictionaries) shall be interpreted as having the same meaning as in their contextual meaning in the relevant technical field and shall not be construed as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this application.

[0022] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] Considering the problems of low film thickness control accuracy, complex adjustment process, reliance on high-precision roll gap sensors, and high equipment cost in existing multi-roll continuous rolling processes, this application proposes a film thickness control method. By acquiring the target film thickness and film formation process parameters, and combining the rolling force model and mechanical balance relationship, the control parameters of each stage of the hydraulic cylinder are calculated. Based on the closed-loop feedback of the output film thickness, the hydraulic cylinder force is dynamically adjusted to achieve high-precision control of the film thickness. This method eliminates the need for roll gap measurement, simplifies the control process, reduces costs, and improves system stability and control efficiency.

[0024] The following examples illustrate the method for controlling the thickness of the diaphragm.

[0025] Figure 1 A flowchart of a membrane thickness control method according to an embodiment of this application is shown. Exemplarily, the membrane thickness control method includes the following steps: Step S100: Obtain the target film thickness and film formation process parameters, and determine the set values ​​of the roll gaps between each level of the rolls in the multi-roll rolling structure based on the target film thickness and film formation process parameters.

[0026] The target film thickness refers to the pre-set final film thickness value, serving as a benchmark target in the control process. Film-forming process parameters refer to the process constraints affecting film formation, including key data such as initial film thickness, compaction ratio, and speed ratio, used to constrain the calculation of roll gaps at each stage. The multi-roll rolling structure refers to a film-forming mechanism composed of multiple sets of cooperating rolls, where the film gradually thins as it passes between each roll during the progressive calendering process. Exemplarily, the system establishes a material deformation relationship model based on the target film thickness and film-forming process parameters, and, combined with the number of rolling stages in the equipment, solves for the corresponding roll gap settings for each roll stage.

[0027] In an optional embodiment, step S100 includes the following sub-steps: S101, Obtain the preset target film thickness and film formation process parameters of the multi-roll rolling structure to be processed.

[0028] Among them, the target membrane thickness This indicates the preset thickness value that the finished film needs to achieve; film formation process parameters include the initial film thickness. Compaction ratio Speed ​​ratios at each stage and equipment operating parameters are used to constrain the deformation pattern of the diaphragm between multiple rollers.

[0029] S102, establish a material deformation relationship model between the target film thickness and the film formation process parameters.

[0030] The material deformation relationship model is used to describe the thickness change of the diaphragm during the progressive rolling process. Exemplarily, the thickness change of the diaphragm as it passes through multiple rolling stages can be determined by the compaction ratio. It can be calculated using the following formula:

[0031] in, This indicates the compaction ratio, with a value greater than 1. Indicates the initial diaphragm thickness; The value represents the target film thickness; the denominator 5 represents the number of stages in the multi-roll rolling structure. This formula illustrates that the thickness variation between the initial thickness and the target thickness needs to be distributed step-by-step across multiple stages of rolls to ensure that the finished product thickness reaches the preset target.

[0032] S103, based on the material deformation relationship model and combined with the number of stages of the multi-roll rolling structure, calculates the roll gap setting value corresponding to each stage of the rolls.

[0033] As an example, the roll gap setting value between each roll can be solved sequentially by the following formula:

[0034]

[0035]

[0036]

[0037]

[0038] in, , , , , These represent the set values ​​for the roll gaps between each roll in a multi-roll rolling structure, with the values ​​increasing progressively with each power. This ensures uniform compression of the diaphragm at each roll gap, so that the total compression ratio corresponds to the target diaphragm thickness. .

[0039] Finally, through the above step-by-step calculations, the set of roll gap settings corresponding to each level of the multi-roll rolling structure is obtained.

[0040] Step S200: Calculate the rolling force corresponding to each level based on the roll gap settings and rolling process parameters.

[0041] Among them, rolling process parameters refer to parameters used to describe the stress and deformation characteristics of the diaphragm during rolling, including the current diaphragm thickness, speed ratio, areal density, and material properties, and are used to calculate the rolling force at each stage. Demonstratively, through a unified rolling force model, the roll gap settings for each stage and the rolling process parameters are input into the model, and the rolling force corresponding to each stage of the roll gap is calculated step by step.

[0042] In an optional embodiment, step S200 includes the following sub-steps: S201, obtain the film thickness value corresponding to the set value of each level of roller gap.

[0043] Among them, the roll gap setting value is the target gap value between each level of the multi-roll rolling structure calculated in the previous step; the diaphragm thickness value refers to the thickness data of the diaphragm before entering a certain level of roll gap, which is used to reflect the instantaneous stress state of the diaphragm.

[0044] like Figure 2 As shown, the diaphragm passes sequentially through rollers 1 to 7, with its thickness decreasing at each stage, forming a thickness sequence. , , , , }

[0045] S202, obtain the rolling process parameters corresponding to the thickness values ​​of each diaphragm.

[0046] Among them, the rolling process parameters include speed ratios at each stage. Membrane surface density, etc. Speed ​​ratio Defined as the ratio of the linear speed of the subsequent roller to the linear speed of the preceding roller, by way of example, when the speed ratio is 2, the film thickness is halved, and the speed ratio has a direct constraint effect on the thickness change.

[0047] S203 establishes a unified rolling force model based on the thickness values ​​of each diaphragm and the rolling process parameters of each stage.

[0048] Among them, the rolling force model is a thickness-rolling force function relationship model established through experimental data fitting and theoretical analysis. It is used to describe the quantitative relationship between the thickness and the required rolling force of the diaphragm under specific material properties and process conditions. Its expression is:

[0049] Its inverse function is:

[0050] in, Indicates rolling force. This represents the thickness of the diaphragm between a certain number of rollers. The formula shows that as the diaphragm thickness decreases, the rolling force increases logarithmically.

[0051] like Figure 3 As shown, there is a clear logarithmic relationship between diaphragm thickness and required rolling force. The horizontal axis represents diaphragm thickness (mm), and the vertical axis represents required rolling force (N). As the diaphragm thickness gradually decreases, the required rolling force increases sharply. This curve, obtained by fitting experimental data points, is consistent with the above formula, thus verifying the rationality and reliability of the rolling force model.

[0052] S204: Input the roll gap setting values ​​and rolling process parameters of each level into a unified rolling force model to obtain the rolling force corresponding to the roll gap setting values ​​of each level.

[0053] As an example, for the section between roller 1 and roller 2, if the thickness is set to... The speed ratio is The thickness of the diaphragm after passing through 1-2 rollers is:

[0054]

[0055] Therefore, the rolling force between rolls 1 and 2 is:

[0056] Similarly, for rollers 2 and 3, if the thickness is... The speed ratio is The thickness of the diaphragm after passing through 2-3 rollers is:

[0057]

[0058] Therefore, the rolling force between rolls 2 and 3 is:

[0059] Rolling force between rolls 3 and 4:

[0060] Rolling force between rolls 4 and 5:

[0061] Rolling force between rolls 5 and 6:

[0062] Rolling force between rolls 6 and 7:

[0063] in, Indicates the first With the The rolling force between the rolls, where α represents the compaction ratio. Indicates the first Speed ​​ratio.

[0064] Through the above step-by-step calculations, a set of rolling forces that matches the multi-roll rolling structure is finally obtained.

[0065] Step S300: Determine the corresponding hydraulic cylinder control parameters for each rolling force level.

[0066] The hydraulic cylinder control parameters refer to the output pressure values ​​or hydraulic control commands set to achieve the target rolling pressure, which drive the hydraulic cylinder to apply the corresponding rolling force. Exemplarily, a unified mechanical equilibrium model is used to input the rolling forces at each stage into the model, calculating the target force values ​​of the hydraulic cylinders corresponding to each roll, thus forming the hydraulic cylinder control parameters.

[0067] In an optional embodiment, step S300 includes the following sub-steps: Substituting the rolling forces at each level into the preset mechanical equilibrium model, the hydraulic cylinder control parameters corresponding to each rolling force are obtained.

[0068] like Figure 4 As shown, in a multi-roll rolling structure, each pair of rolls is subjected to a corresponding rolling force. and hydraulic cylinder force and work together with the external hydraulic cylinder Together they work. The area represents the rolling force at each level. , , , , , , The area represents the force of each cylinder. , , , , , The gray area represents the roller body. Unlike the traditional method of adjusting the roller gap using wedges, this embodiment uses hydraulic cylinders instead of wedges. The size of the roller gap is controlled by the extension and retraction of the hydraulic cylinders, thereby achieving precise control of the film thickness. The powder enters between rollers 1 and 2, is rolled and transferred step by step by each stage of rollers, and is finally rolled into a film and discharged between rollers 6 and 7.

[0069] In this structure, a mechanical equilibrium model is used to describe the force distribution law of each rolling unit under the action of the resultant force of the external hydraulic cylinder. The resultant force of the external hydraulic cylinder is... This force acts on the two bearing seats of roll No. 1, with each bearing seat experiencing a force of 0.5F1. For each stage of the rolling structure, the following force balance equation is established:

[0070] According to the force balance relationship, each stage of the roller satisfies the following equation:

[0071]

[0072]

[0073]

[0074]

[0075]

[0076] in, This represents the hydraulic cylinder force corresponding to the roll gap ij. The formula indicates that when the resultant force of the external hydraulic cylinders is distributed across each roll group, it must simultaneously counteract the rolling force of the corresponding roll gap to maintain overall balance.

[0077] By rearranging the equilibrium equations, analytical expressions for the forces of each stage of the hydraulic cylinder are obtained:

[0078] If the rolling force between roll 1 and roll 2 is Then the corresponding cylinder control parameters are:

[0079] Similarly, we can obtain:

[0080]

[0081]

[0082]

[0083]

[0084] Ultimately, a set of hydraulic cylinder control parameters is formed. , , , , , This set ensures that, under known rolling force conditions, the pressure applied by each stage of the hydraulic cylinder remains consistent with the total resultant force of the external hydraulic cylinders, thereby ensuring that the diaphragm is subjected to balanced forces during multi-stage rolling.

[0085] Step S400: Based on the control parameters of each level of the hydraulic cylinder, drive each level of the hydraulic cylinder to apply pressure to the diaphragm, and compare the real-time detected actual diaphragm thickness with the target diaphragm thickness to obtain the thickness deviation corresponding to each level.

[0086] The actual diaphragm thickness refers to the real-time thickness value obtained by a detection device during the diaphragm rolling process; the detection device can be a diaphragm thickness sensor located at the exit of the final roll. Exemplarily, the calculated cylinder control parameters are distributed to each cylinder, driving each cylinder to apply pressure. Under these conditions, diaphragm thickness data is collected using a diaphragm thickness sensor, and the actual diaphragm thickness is obtained through numerical processing. By comparing the actual diaphragm thickness with the target diaphragm thickness, the corresponding thickness deviation for each stage is obtained.

[0087] In an optional embodiment, step S400 includes the following sub-steps: S401 maps the control parameters of each level of hydraulic cylinder to each level of hydraulic cylinder, and drives each level of hydraulic cylinder to apply pressure according to the control parameters of each level of hydraulic cylinder.

[0088] Exemplary, the hydraulic cylinder control parameters are a set of parameters obtained from rolling force calculations and mechanical equilibrium models, corresponding to the hydraulic cylinder forces applied by each roll group in a multi-roll rolling structure. Through parameter allocation, each pair of rolls receives a hydraulic cylinder force matching its rolling force. The hydraulic cylinder pressure application process is carried out under the command of a real-time controller, with each cylinder executing synchronously to ensure continuous force on the diaphragm between different roll groups during rolling, avoiding thickness deviations caused by uneven local force.

[0089] S402, under the pressure applied by each level of the hydraulic cylinder, the diaphragm thickness is detected to obtain the actual diaphragm thickness. The actual diaphragm thickness is compared with the target diaphragm thickness to obtain the thickness deviation corresponding to each level.

[0090] Specifically, thickness detection is performed by a film thickness sensor, which is installed after the film has passed through the end roller assembly. The detection data is fed back to the control system in real time for comparison with the target thickness. Thickness deviation refers to the difference between the actual film thickness and the target film thickness, used to assess whether the current rolling state meets the preset accuracy requirements and as the trigger for the feedback control mechanism. For example, the detection result is recorded as... This corresponds to the instantaneous thickness of the film after rolling. Target film thickness This is the preset target control value. Thickness deviation. Defined as:

[0091] in, The real-time membrane thickness is obtained from the membrane thickness sensor. The target membrane thickness. If Exceeding the preset allowable error threshold If so, it is determined that feedback adjustment needs to be performed.

[0092] Step S500: Adjust the roller gap setting value or the hydraulic cylinder control parameter of each level according to the thickness deviation of each level to obtain the film thickness that meets the preset requirements.

[0093] For example, if the thickness deviation exceeds the preset allowable threshold, feedback adjustment is performed, the roll gap setting or cylinder control parameters are updated, and each cylinder is re-driven to apply pressure until the actual film thickness detected again fluctuates within the allowable range, thereby meeting the preset standard.

[0094] In an optional embodiment, step S500 includes the following sub-steps: Adjust the set values ​​of the roller gaps at each level or the control parameters of the hydraulic cylinders at each level based on the thickness deviation to obtain the film thickness that meets the preset accuracy requirements.

[0095] As an example, a film thickness measurement sensor is installed at the rear end of roll 7 to acquire real-time thickness data of the film after final rolling. and the preset target thickness The thickness deviation value is obtained by comparison. It falls within the allowable error range, that is If the thickness deviation exceeds the allowable error range, then there is no need to adjust the control parameters of each cylinder; the pressure applied by each cylinder remains unchanged. Then a correction value needs to be reset. For example, through formula And using this correction value as input, the set of force matrices for each level of cylinder is recalculated. This updates the control parameters of each level of the hydraulic cylinder.

[0096] The recalculated control parameters for each stage of the hydraulic cylinders are applied to the cylinders between the rolls, thereby driving the cylinders to readjust the roll gap and complete the new rolling process. During this process, sensors continuously monitor the new film thickness and update the thickness deviation value. When the calculated new thickness deviation value satisfies When the membrane thickness reaches the preset accuracy requirement, the feedback adjustment process ends; otherwise, the above process continues iteratively until the membrane thickness stabilizes within the target range. Figure 5 As shown.

[0097] In one alternative implementation, the roll gap setting value or the hydraulic cylinder control parameters at each stage are adjusted based on the current thickness deviation value.

[0098] Among them, thickness deviation value When a new thickness deviation is detected, the control system updates the existing feedback adjustment signal. If the deviation shows a decreasing trend, the adjustment range is reduced; if the deviation is still greater than the allowable range, the adjustment range is increased to accelerate convergence. In other words, based on the updated feedback adjustment results, the roll gap setting or cylinder force parameters are dynamically corrected. For example, when the diaphragm is too thick, the system tightens the roll gap or increases the cylinder pressure; when the diaphragm is too thin, the system widens the roll gap or decreases the cylinder pressure.

[0099] After adjustment, the membrane thickness is re-detected and a new thickness deviation value is calculated to obtain a thickness deviation that is less than the preset thickness error threshold.

[0100] Under the updated parameters, the diaphragm passes through multi-stage rolling again, and the film thickness sensor re-collects the actual diaphragm thickness to obtain a new thickness value. The new thickness deviation is then calculated:

[0101] And compare it with the preset thickness error threshold. Compare them.

[0102] If the conditions are met, the membrane thickness is determined to meet the accuracy requirements; if the conditions are not met, the process returns to the previous steps and continues to update the feedback adjustment results until the thickness error converges to within the threshold.

[0103] Figure 6 A schematic diagram of a diaphragm thickness control device according to an embodiment of this application is shown. Exemplarily, the diaphragm thickness control device 100 includes: The parameter setting module 110 is used to acquire the target film thickness and film forming process parameters, and to determine the roll gap setting value between each level of the rolls in the multi-roll rolling structure based on the target film thickness and the film forming process parameters. The rolling force calculation module 120 is used to calculate the rolling force corresponding to each stage based on the roll gap setting value and rolling process parameters of each stage; The parameter determination module 130 is used to determine the corresponding hydraulic cylinder control parameters for each stage based on the rolling force at each stage. The thickness acquisition module 140 is used to drive each level of the hydraulic cylinder to apply pressure to the diaphragm based on the control parameters of each level of the hydraulic cylinder, and compare the real-time detected actual diaphragm thickness with the target diaphragm thickness to obtain the thickness deviation corresponding to each level. The adjustment module 150 is used to adjust the roll gap setting value or the hydraulic cylinder control parameter of each stage according to the thickness deviation of each stage, so as to obtain a film thickness that meets the preset requirements.

[0104] It is understood that the apparatus of this embodiment corresponds to the method of the above embodiments, and the options in the above embodiments are also applicable to this embodiment, so they will not be described again here.

[0105] This application also provides a terminal device, exemplary of which includes a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program to enable the terminal device to perform the functions of the various modules in the above-described method or apparatus.

[0106] The processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, including at least one of a Central Processing Unit (CPU), Graphics Processing Unit (GPU), Network Processor (NP), Digital Signal Processor (DSP), Application-Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor, capable of implementing or executing the methods, steps, and logic block diagrams disclosed in the embodiments of this application.

[0107] The memory can be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory is used to store computer programs, and the processor can execute the computer programs accordingly after receiving execution instructions.

[0108] This application also provides a computer-readable storage medium for storing the computer program used in the aforementioned terminal device. For example, the computer-readable storage medium may include, but is not limited to, various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0109] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that, in alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0110] In addition, the functional modules or units in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0111] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a smartphone, personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0112] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A method for controlling diaphragm thickness, characterized in that, The method includes: Obtain the target film thickness and film formation process parameters, and determine the roll gap setting value between each stage of the multi-roll rolling structure based on the target film thickness and the film formation process parameters; Based on the roll gap settings and rolling process parameters for each stage, calculate the rolling force corresponding to each stage; The corresponding hydraulic cylinder control parameters for each stage are determined based on the rolling force described at each stage. Based on the control parameters of each level of the hydraulic cylinder, each level of the hydraulic cylinder is driven to apply pressure to the diaphragm. After the diaphragm is rolled by the final roller group, the actual diaphragm thickness is detected in real time. The actual diaphragm thickness is compared with the target diaphragm thickness to obtain the thickness deviation. Adjust the roller gap setting value or the hydraulic cylinder control parameter at each stage according to the thickness deviation to obtain a film thickness that meets the preset requirements.

2. The diaphragm thickness control method according to claim 1, characterized in that, The step of obtaining the target film thickness and film-forming process parameters, and determining the roll gap setting value between each stage of the multi-roll rolling structure based on the target film thickness and the film-forming process parameters, includes: Obtain the preset target film thickness and film formation process parameters for the multi-roll rolling structure to be processed; A material deformation relationship model is established between the target film thickness and the film formation process parameters; Based on the material deformation relationship model and the number of stages of the multi-roll rolling structure, the roll gap setting value corresponding to each stage of the rolls is calculated.

3. The diaphragm thickness control method according to claim 1, characterized in that, The calculation of the rolling force corresponding to each stage based on the roll gap settings and rolling process parameters includes: Obtain the film thickness value corresponding to the roll gap setting value at each level; Obtain the rolling process parameters for each stage corresponding to the diaphragm thickness values ​​at each stage; A unified rolling force model is established based on the diaphragm thickness values ​​and rolling process parameters at each level; By inputting the roll gap setting values ​​and rolling process parameters of each level into the unified rolling force model, the rolling force corresponding to the roll gap setting values ​​of each level is obtained.

4. The diaphragm thickness control method according to claim 1, characterized in that, The process of determining the corresponding cylinder control parameters for each rolling force includes: Substituting the rolling forces at each level into a preset mechanical equilibrium model, the hydraulic cylinder control parameters corresponding to the rolling forces at each level are obtained.

5. The diaphragm thickness control method according to claim 1, characterized in that, The process involves driving each stage of the hydraulic cylinders to apply pressure based on the control parameters of each stage, and after the diaphragm is rolled by the final roller group, the actual diaphragm thickness is detected in real time. The actual diaphragm thickness is compared with the target diaphragm thickness to obtain the thickness deviation, including: The control parameters of each level of the hydraulic cylinder are mapped to each level of the hydraulic cylinder, and the hydraulic cylinders at each level are driven to apply pressure according to the control parameters of each level of the hydraulic cylinder; The diaphragm thickness is detected under pressure applied by each level of the hydraulic cylinder to obtain the actual diaphragm thickness. The actual diaphragm thickness is then compared with the target diaphragm thickness to obtain the thickness deviation.

6. The diaphragm thickness control method according to claim 1, characterized in that, The step of adjusting the roll gap setting value or the hydraulic cylinder control parameter at each stage according to the thickness deviation to obtain a film thickness that meets the preset requirements includes: The set values ​​of the roller gaps at each level or the control parameters of the hydraulic cylinders at each level are adjusted based on the thickness deviation to obtain a film thickness that meets the preset accuracy requirements.

7. The diaphragm thickness control method according to claim 6, characterized in that, The adjustment of the set values ​​of the roll gaps at each stage or the control parameters of the hydraulic cylinders at each stage based on the thickness deviation further includes: Adjust the set values ​​of the roll gaps at each level or the control parameters of the hydraulic cylinders at each level based on the current thickness deviation; After adjustment, the membrane thickness is re-detected and a new thickness deviation is calculated to obtain a thickness deviation that is less than the preset thickness error threshold.

8. A diaphragm thickness control device, characterized in that, include: The parameter setting module is used to obtain the target film thickness and film formation process parameters, and determine the roll gap setting value between each level of the rolls in the multi-roll rolling structure based on the target film thickness and the film formation process parameters. The rolling force calculation module is used to calculate the rolling force corresponding to each stage based on the roll gap setting value and rolling process parameters of each stage; The parameter determination module is used to determine the corresponding hydraulic cylinder control parameters for each stage based on the rolling force described at each stage. The thickness acquisition module is used to drive each level of the hydraulic cylinder to apply pressure to the diaphragm based on the control parameters of each level of the hydraulic cylinder, and to detect the actual diaphragm thickness in real time after the diaphragm is rolled by the final roller group, and to compare the actual diaphragm thickness with the target diaphragm thickness to obtain the thickness deviation. The adjustment module is used to adjust the set value of the roller gap at each stage or the control parameter of the hydraulic cylinder at each stage according to the thickness deviation, so as to obtain a film thickness that meets the preset requirements.

9. A terminal device, characterized in that, The terminal device includes a processor and a memory, the memory storing a computer program, and the processor executing the computer program to implement the film thickness control method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed on a processor, implements the film thickness control method according to any one of claims 1-7.

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