Calibration method, device and equipment for roll gap of pinch roll and medium
By dynamically adjusting the clamping roll gap calibration value and determining the calibration value based on the cumulative number of blocks, the problem of the calibration value remaining unchanged after the clamping roll wears out is solved, thus improving the stability and reliability of the winding process.
Patent Information
- Application Number
- CN202511333710.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2025-12-23
AI Technical Summary
In the existing technology, the roll gap calibration value remains unchanged after the pinch roll wears out, resulting in poor wear compensation effect and affecting the stability and reliability of the winding process.
The calibration value of the roll gap is dynamically adjusted according to the cumulative number of strips pinched by the pinch rolls, so that the calibration value changes with the wear condition. The calibration value is determined by obtaining the cumulative number of strips, and the actual value of the roll gap is calibrated as the calibration value under the calibration state.
It improves the compensation effect of roll gap calibration, enhances the stability and reliability of the winding process, and reduces the incidence of winding accidents.
Smart Images
Figure CN121178628A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of metallurgical technology, and in particular to a method, apparatus, equipment and medium for calibrating the gap of a pinch roll. Background Technology
[0002] During hot rolling coiling, due to the influence of production specifications, pinch rolls are prone to severe wear in the middle after long-term service, which significantly reduces their ability to guide the strip head downwards. If the pinch rolls are not replaced in time, and thin and narrow strips are produced in the later stages of wear, the strip head is prone to slipping into the gap between the upper pinch roll and the valve, causing a coiling pile-up accident.
[0003] In the prior art, when the pinch rolls wear out, the roll gap of the pinch rolls is recalibrated to avoid the strip head from entering the gap between the pinch rolls and the gate as much as possible.
[0004] However, the calibration values used during each recalibration are fixed, which leads to a progressively worse effect of subsequent calibrations on wear compensation, affecting the stability and reliability of the winding process. Summary of the Invention
[0005] In view of the above problems, this application is made to provide a method, apparatus, equipment and medium for calibrating the gap of pinch rolls to solve the above problems. The calibration value can be determined according to the cumulative number of strips pinched by the pinch rolls each time the gap is calibrated, so that the calibration value changes with the wear condition, thereby improving the wear compensation effect of calibration and improving the stability and reliability of the coiling process.
[0006] In a first aspect, this application provides a method for calibrating the gap of a pinch roll, the method comprising: Get the cumulative number of strips currently being fed by the pinch rolls; Based on the cumulative number of blocks, the calibration value of the roll gap of the current pinch roll is determined, and the calibration value is positively correlated with the cumulative number of blocks; After the current pinch roll is controlled to enter the calibration state, the actual value of the roll gap corresponding to the current pinch roll in the calibration state is calibrated as the calibration value.
[0007] Optionally, determining the calibration value of the roll gap of the current pinch roll based on the cumulative number of blocks includes: Obtain the initial value for the roll gap calibration; Based on the cumulative number of blocks, a calibrated adjustment amount is determined, wherein the adjustment amount is positively correlated with the cumulative number of blocks; The sum of the initial value and the adjustment amount is used as the calibration value of the roll gap of the current pinch roll.
[0008] Optionally, determining the calibration adjustment amount based on the cumulative number of blocks includes: Get the adjustment value for the number of individual blocks; The product of the cumulative number of blocks and the adjustment value is used as the calibration adjustment amount.
[0009] Optionally, after controlling the current pinch roll to enter the calibration state, the actual value of the roll gap corresponding to the current pinch roll in the calibration state is calibrated as the calibration value, including: Control the current pinch roll to enter the roll gap control mode, and control the roll gap of the current pinch roll to be the preset first roll gap; The roll gap of the current pinch roll is controlled to decrease from the first roll gap to a preset second roll gap, and the total pressure on both sides of the current pinch roll is cleared to zero. The total pressure on both sides is the sum of the first pressure on the operating side and the second pressure on the driving side. Increase the total pressure on both sides and control the roll gap of the current pinch roll to decrease from the second roll gap until the total pressure on both sides reaches the preset target pressure. Then stop decreasing the roll gap of the current pinch roll and increasing the total pressure on both sides, and control the current pinch roll to switch from the roll gap control mode to the pressure control mode, and the difference between the first pressure and the second pressure is less than the preset difference threshold, so that the current pinch roll enters the calibration state. The actual value of the roll gap corresponding to the current pinch roll in the calibration state is calibrated as the calibration value.
[0010] Optionally, controlling the roll gap of the current pinch roll to a preset first roll gap includes: The current pinch roll gap is controlled to open to the first roll gap at a preset first speed.
[0011] Optionally, controlling the roll gap of the current pinch roll to decrease from the first roll gap to a preset second roll gap includes: The gap between the current pinch rolls is controlled to decrease from the first gap to the second gap at a preset second speed; Wherein, the first speed is greater than the second speed.
[0012] Optionally, increasing the total pressure on both sides and controlling the roll gap of the current pinch roll to decrease starting from the second roll gap includes: When the current pinch roll gap is the second gap, after a preset time, the total pressure on both sides is increased and the current pinch roll gap is controlled to decrease from the second gap.
[0013] Secondly, this application provides a calibration device for the gap of a pinch roll, the device comprising: The acquisition module is used to acquire the cumulative number of strips currently being fed by the pinch rolls; The determination module is used to determine the calibration value of the roll gap of the current pinch roll based on the cumulative number of blocks; The calibration module is used to control the current pinch roll to enter the calibration state and then calibrate the actual value of the roll gap corresponding to the current pinch roll in the calibration state as the calibration value.
[0014] Thirdly, this application provides an electronic device, including: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method as described in the first aspect.
[0015] Fourthly, this application provides a computer-readable storage medium storing computer instructions for causing the computer to perform the method described in the first aspect.
[0016] The technical solutions provided in this application embodiment have at least the following technical effects or advantages: This application provides a method, apparatus, equipment, and medium for calibrating the roll gap of a pinch roll. The method involves acquiring the cumulative number of strip pieces currently being fed by the pinch roll, which reflects the wear level of the pinch roll. Based on the cumulative number of pieces, a calibration value for the roll gap of the current pinch roll is determined, i.e., the calibration value is determined based on the wear level. This allows the calibration value to better compensate for roll gap differences caused by wear, and the calibration value is positively correlated with the cumulative number of pieces. After the current pinch roll enters the calibration state, the actual value of the roll gap corresponding to the current pinch roll in the calibration state is calibrated as the calibration value, thus completing the roll gap calibration. This method can determine the calibration value based on the cumulative number of strip pieces currently being fed by the pinch roll during each roll gap calibration, allowing the calibration value to change with the wear condition, thereby improving the calibration's wear compensation effect and enhancing the stability and reliability of the coiling process.
[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the structure of a pinch roller control system provided in an embodiment of this application; Figure 2 This is a flowchart of a method for calibrating the gap of a pinch roll provided in an embodiment of this application; Figure 3 This is a structural block diagram of a calibration device for the gap between pinch rolls provided in an embodiment of this application. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the embodiments of this disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. Unless otherwise specified, the embodiments of this application and the technical features in the embodiments can be combined with each other.
[0020] Before providing a detailed description of the calibration method for the gap of a pinch roll provided in the embodiments of this application, a brief introduction to the implementation environment involved will be given first. Figure 1 This is a schematic diagram of the structure of a pinch roller control system provided in an embodiment of this application, as shown below. Figure 1 As shown, the pinch roll control system includes an upper pinch roll 1, a lower pinch roll 2, a hydraulic cylinder 3, a magnetic scale 4, a first pressure sensor 5, and a second pressure sensor 6. There is a hydraulic cylinder 3 on each side of the upper pinch roll 1. The hydraulic cylinders 3 are used to adjust the roll gap between the upper pinch roll 1 and the lower pinch roll 2. The magnetic scale 4 is used to detect the stroke of the hydraulic cylinders 3. The first pressure sensor 5 is used to detect the pressure on the operating side of the upper pinch roll 1, and the second pressure sensor 6 is used to detect the pressure on the driving side of the upper pinch roll 1.
[0021] The roll gap between the upper pinch roller 1 and the lower pinch roller 2 can be calculated based on the stroke of the hydraulic cylinder 3. The first pressure sensor 5 and the second pressure sensor 6 include a hydraulic cylinder piston-side pressure sensor and a rod-side pressure sensor. Pressure F1 is obtained by multiplying the pressure collected by the piston-side pressure sensor by the piston side area, and pressure F2 is obtained by multiplying the pressure collected by the rod-side pressure sensor by the rod side area. The difference between F1 and F2 is calculated to obtain the pressure on the operating side or the driving side. For example, the magnetic scale accuracy can be 2 micrometers.
[0022] Figure 2 This is a flowchart of a method for calibrating the gap of a pinch roll provided in an embodiment of this application, as shown below. Figure 2 As shown, the method includes: Step S210: Obtain the cumulative number of strips being fed by the current pinch roll.
[0023] In this embodiment, a counter can be used to count the cumulative number of strips clamped by the current pinch roll since it was put into use. The current pinch roll is the pinch roll currently in use in the pinch roll control system. The larger the cumulative number of strips, the longer the current pinch roll has been in service, and the greater the wear of the current pinch roll.
[0024] Step S220: Determine the calibration value of the current pinch roll gap based on the cumulative number of blocks. The calibration value is positively correlated with the cumulative number of blocks.
[0025] In this embodiment, the calibration value is determined based on the cumulative number of blocks, which is the same as determining the calibration value based on the degree of wear. Therefore, the calibration value changes with the degree of wear.
[0026] Step S230: After controlling the current pinch roll to enter the calibration state, the actual value of the roll gap corresponding to the current pinch roll in the calibration state is calibrated as the calibration value.
[0027] In this embodiment, the current pinch roll is adjusted to the calibration state, and then the actual value of the roll gap of the current pinch roll in the calibration state is calibrated as the calibration value, thereby completing the calibration of the roll gap. This allows the calibrated roll gap to compensate for the wear of the current pinch roll, and can better adjust the roll gap during the production process, thereby improving the stability and reliability of the winding process.
[0028] The state of the pinch roller under calibration can be set according to the actual situation.
[0029] Optionally, step S220 includes: The first step is to obtain the initial value of the roll gap calibration.
[0030] In this embodiment, the initial value can be pre-calibrated based on design parameters such as the diameter of the current pinch roller and working experience. For example, the initial value is -0.65mm.
[0031] The second step is to determine the calibration adjustment amount based on the cumulative number of blocks. The adjustment amount is positively correlated with the cumulative number of blocks. In this embodiment, the larger the cumulative number of blocks, the more severe the wear. Therefore, the calibrated adjustment amount is determined based on the cumulative number of blocks. The larger the cumulative number of blocks, the larger the adjustment amount and the more compensation for wear.
[0032] Optional, the second step includes: Obtain the adjustment value for a single block; multiply the cumulative block count by the adjustment value as the calibrated adjustment amount.
[0033] In this embodiment, the adjustment value for a single block can be pre-calibrated, for example, 0.1 / 2000mm. For each additional block, the adjustment amount increases by one adjustment value. Therefore, the adjustment amount is the product of the cumulative number of blocks and the adjustment value, so that the wear compensation can be accurate to each strip of steel currently being fed by the pinch roll.
[0034] The third step is to use the sum of the initial value and the adjustment amount as the calibration value of the current pinch roll gap.
[0035] In the embodiments of this application, the initial value plus the adjustment amount can be used to obtain the calibration value. For example, if the initial value is -0.65, the cumulative number of blocks is n, and the adjustment value for the number of individual blocks is 0.1 / 2000mm, then the calibration value is -0.65+n / 2000.
[0036] The calibrated value is lower than the preset upper limit to ensure the safety of production equipment, the stability of the process, and the quality of the product. For example, the upper limit is 0.5mm.
[0037] Optionally, step S230 includes: Step S2301: Control the current pinch roll to enter the roll gap control mode, and control the roll gap of the current pinch roll to the preset first roll gap.
[0038] In the embodiments of this application, the pinch roll generally includes a roll gap control mode and a pressure control mode. In the roll gap control mode, the roll gap is used as the adjustment reference, and the actual roll gap is kept at the target roll gap without considering pressure changes. In the pressure control mode, the pressure is used as the adjustment reference, and the actual pressure is kept at the target pressure without considering roll gap changes.
[0039] In the process of controlling the current pinch roll to enter the calibration state, the first step is to open the upper pinch roll, so that the roll gap of the current pinch roll opens to the first roll gap. The first roll gap can be the maximum roll gap of the current pinch roll, or any other roll gap. For example, the maximum roll gap is 520mm.
[0040] Optionally, step S2301 includes: Control the current pinch roll gap to open to the first gap at a preset first speed.
[0041] In this embodiment, the upper pinch roll can be opened at a relatively high first speed until the roll gap of the current pinch roll quickly opens to the first roll gap, thereby improving calibration efficiency. The first speed can be the maximum speed at which the upper pinch roll opens, or it can be any speed slightly lower than the maximum speed.
[0042] Step S2302: Control the current pinch roll gap to decrease from the first pinch roll gap to the preset second pinch roll gap, and reset the total pressure on both sides of the current pinch roll to zero.
[0043] Next, with the current pinch roll gap at the first gap, the pinch roll gap is reduced to the second gap, bringing the current pinch roll state close to the calibrated state. Simultaneously, the pressure on both sides of the current pinch roll is reset to zero, allowing for more accurate adjustment of the pressure on both sides when entering pressure control mode later.
[0044] The total pressure on both sides is the sum of the first pressure on the operating side and the second pressure on the driving side.
[0045] Optionally, step S2302 includes: Control the current pinch roll gap to decrease from the first gap to the second gap at a preset second speed.
[0046] In this embodiment, the upper pinch roller can be controlled to close at a slightly higher second speed until the gap of the current pinch roller quickly drops to the second gap, thereby improving calibration efficiency through the slightly higher second speed.
[0047] The first speed is greater than the second speed to prevent the upper pinch roller from closing too quickly and becoming difficult to control. For example, the second speed is 100 mm / s, and the second roll gap is 20 mm.
[0048] Step S2303: Increase the total pressure on both sides and control the roll gap of the current pinch roll to decrease from the second roll gap until the total pressure on both sides reaches the preset target pressure. Then, stop decreasing the roll gap of the current pinch roll and increasing the total pressure on both sides, and control the current pinch roll to switch from the roll gap control mode to the pressure control mode. The difference between the first pressure and the second pressure is less than the preset difference threshold, so that the current pinch roll enters the calibration state.
[0049] Next, after the current pinch roll gap reaches the second gap, the total pressure on both sides is gradually increased from 0, while the current pinch roll gap is slowly decreased starting from the second gap, until the total pressure on both sides reaches the target pressure. At this point, the decrease in the current pinch roll gap and the increase in the total pressure on both sides are stopped. Then, the current pinch roll is switched from the gap control mode to the pressure control mode, and the pressure on the operating side and the drive side is leveled to make the first pressure and the second pressure as equal as possible. That is, the difference between the first pressure and the second pressure is controlled to be less than a preset difference threshold. After leveling, the current pinch roll officially enters the calibration state.
[0050] For example, the target pressure is 50 kN, the sum of the first pressure and the second pressure is 50 kN, and the first pressure and the second pressure are 25 ± 5 kN.
[0051] Optionally, step S2303 includes: When the current pinch roll gap is the second gap, after a preset time, the total pressure on both sides is increased and the current pinch roll gap is controlled to decrease from the second gap.
[0052] In this embodiment, when the gap of the current pinch roller is kept at a preset level below the second gap, the gap is stabilized before the total pressure on both sides is increased and the gap of the current pinch roller is controlled to decrease from the second gap, so that the control is more accurate.
[0053] Among them, controlling the roll gap of the current pinch roll to decrease starting from the second roll gap includes: The gap between the current pinch rolls is controlled to decrease from the second gap at a preset third speed, which is very small and much smaller than the second speed. For example, it is 1.5 mm / s.
[0054] This can be understood as follows: when the gap of the current pinch roller is below the second gap, the upper pinch roller and the lower pinch roller are already very close. Therefore, at this time, the upper pinch roller should be controlled to press down slowly until the total pressure on both sides reaches the target pressure.
[0055] Step S2304: Calibrate the actual value of the roll gap corresponding to the current pinch roll in the calibration state as the calibration value.
[0056] Finally, after the current pinch roll enters the calibration state, the roll gap is calibrated so that the roll gap corresponding to the calibration state is the calibration value.
[0057] This means that, starting from when the current pinch roll enters the calibration state, after a target time, the actual value of the roll gap corresponding to the current pinch roll in the calibration state will be calibrated as the calibration value.
[0058] This can be understood as controlling the current pinch roll to remain in the calibrated state for a certain period of time, allowing the roll gap to stabilize before calibrating the roll gap. For example, the target duration is 3 seconds.
[0059] The method in this embodiment collects the cumulative number of steel plates pinched by the pinch rolls in real time, and dynamically adjusts the roll gap calibration value based on the cumulative number of plates during each calibration, thereby achieving precise compensation for wear. Experimental results show that this compensation mechanism can effectively correct the roll gap deviation caused by wear in the middle of the pinch rolls, making the actual roll gap value closer to the theoretical set value. This dynamic calibration strategy significantly improves the guiding function of the pinch rolls for the strip head, greatly reduces the incidence of coiling accidents caused by pinch roll wear, and provides an effective technical solution for improving the stability of the hot rolling coiling process.
[0060] Based on the same concept, embodiments of the present invention also provide a calibration device for the gap between pinch rolls. Figure 3 This is a structural block diagram of a calibration device for the gap between pinch rolls provided in an embodiment of this application, as shown below. Figure 3 As shown, the device 300 includes an acquisition module 301, a determination module 302, and a calibration module 303.
[0061] The acquisition module 301 is used to acquire the cumulative number of strips currently being fed by the pinch rolls; The determination module 302 is used to determine the calibration value of the current pinch roll gap based on the cumulative number of blocks; The calibration module 303 is used to control the current pinch roll to enter the calibration state and calibrate the actual value of the roll gap corresponding to the current pinch roll in the calibration state as the calibration value.
[0062] Optionally, the determining module 302 includes: The acquisition unit is used to acquire the initial value of the roll gap calibration; The first determining unit is used to determine the calibration adjustment amount based on the cumulative number of blocks, and the adjustment amount is positively correlated with the cumulative number of blocks; The second determining unit is used to take the sum of the initial value and the adjustment amount as the calibration value of the current pinch roll gap.
[0063] Optionally, the first determining unit is also used for: Get the adjustment value for the number of individual blocks; The product of the cumulative number of blocks and the adjustment value is used as the calibration adjustment amount.
[0064] Optionally, calibration module 303 includes: The first control unit is used to control the current pinch roll to enter the roll gap control mode and control the roll gap of the current pinch roll to the preset first roll gap. The second control unit is used to control the current pinch roll gap to decrease from the first pinch roll gap to the preset second pinch roll gap, and to clear the total pressure on both sides of the current pinch roll to zero. The total pressure on both sides is the sum of the first pressure on the operating side and the second pressure on the driving side. The third control unit is used to increase the total pressure on both sides and control the roll gap of the current pinch roll to decrease from the second roll gap until the total pressure on both sides reaches the preset target pressure. Then, it stops decreasing the roll gap of the current pinch roll and increasing the total pressure on both sides, and controls the current pinch roll to switch from the roll gap control mode to the pressure control mode. The difference between the first pressure and the second pressure is less than the preset difference threshold, so that the current pinch roll enters the calibration state. The calibration unit is used to calibrate the actual value of the roll gap corresponding to the current pinch roll in the calibration state as the calibration value.
[0065] Optionally, the first control unit is also used for: Control the current pinch roll gap to open to the first gap at a preset first speed.
[0066] Optionally, the second control unit is also used for: Control the current pinch roll gap to decrease from the first gap to the second gap at a preset second speed; The first speed is greater than the second speed.
[0067] Optionally, the third control unit is also used for: When the current pinch roll gap is the second gap, after a preset time, the total pressure on both sides is increased and the current pinch roll gap is controlled to decrease from the second gap.
[0068] It is understood that the device provided in the above embodiments is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.
[0069] This invention also provides an electronic device that may include a processor and a memory, wherein the processor and the memory may be interconnected via a bus or other means.
[0070] The processor can be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application, or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or other chips, or combinations of the above types of chips.
[0071] Memory may include mass storage for data or instructions. For example, and not limitingly, memory may include hard disk drives (HDDs), floppy disk drives, flash memory, optical disks, magneto-optical disks, magnetic tape, or Universal Serial Bus (USB) drives, or combinations of two or more of these. Where appropriate, memory may include removable or non-removable (or fixed) media. Where appropriate, memory may be internal or external to an electronic device. In a particular embodiment, memory may be non-volatile solid-state memory.
[0072] In one instance, the memory may be read-only memory (ROM). In one instance, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.
[0073] The processor reads and executes computer program instructions stored in the memory to implement any of the above-described methods for calibrating the gap of the pinch rolls.
[0074] In one example, the electronic device may further include a communication interface and a bus. The processor, memory, and communication interface are connected via the bus to communicate with each other. The communication interface is primarily used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of this application. Where appropriate, the bus may include one or more buses.
[0075] Furthermore, in conjunction with the calibration method for the pinch roll gap in the above embodiments, this invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the pinch roll gap calibration methods described in the above embodiments.
[0076] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The storage medium can be read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.
[0077] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: This application provides a method, apparatus, equipment, and medium for calibrating the roll gap of a pinch roll. The method involves acquiring the cumulative number of strip pieces currently being fed by the pinch roll, which reflects the wear level of the pinch roll. Based on the cumulative number of pieces, a calibration value for the roll gap of the current pinch roll is determined, i.e., the calibration value is determined based on the wear level. This allows the calibration value to better compensate for roll gap differences caused by wear, and the calibration value is positively correlated with the cumulative number of pieces. After the current pinch roll enters the calibration state, the actual value of the roll gap corresponding to the current pinch roll in the calibration state is calibrated as the calibration value, thus completing the roll gap calibration. This method can determine the calibration value based on the cumulative number of strip pieces currently being fed by the pinch roll during each roll gap calibration, allowing the calibration value to change with the wear condition, thereby improving the calibration's wear compensation effect and enhancing the stability and reliability of the coiling process.
[0078] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.
[0079] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.
[0080] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.
Claims
1. A method for calibrating the gap of a pinch roll, characterized in that, The method includes: Get the cumulative number of strips currently being fed by the pinch rolls; Based on the cumulative number of blocks, the calibration value of the roll gap of the current pinch roll is determined, and the calibration value is positively correlated with the cumulative number of blocks; After the current pinch roll is controlled to enter the calibration state, the actual value of the roll gap corresponding to the current pinch roll in the calibration state is calibrated as the calibration value.
2. The method for calibrating the gap of the pinch rolls according to claim 1, characterized in that, Determining the calibration value of the roll gap of the current pinch roll based on the cumulative number of blocks includes: Obtain the initial value for the roll gap calibration; Based on the cumulative number of blocks, a calibrated adjustment amount is determined, wherein the adjustment amount is positively correlated with the cumulative number of blocks; The sum of the initial value and the adjustment amount is used as the calibration value of the roll gap of the current pinch roll.
3. The method for calibrating the gap of the pinch rolls according to claim 2, characterized in that, The step of determining the calibrated adjustment amount based on the cumulative number of blocks includes: Get the adjustment value for the number of individual blocks; The product of the cumulative number of blocks and the adjustment value is used as the calibration adjustment amount.
4. The method for calibrating the gap of the pinch rolls according to claim 1, characterized in that, After controlling the current pinch roll to enter the calibration state, the actual value of the roll gap corresponding to the current pinch roll in the calibration state is calibrated as the calibration value, including: Control the current pinch roll to enter the roll gap control mode, and control the roll gap of the current pinch roll to be the preset first roll gap; The roll gap of the current pinch roll is controlled to decrease from the first roll gap to a preset second roll gap, and the total pressure on both sides of the current pinch roll is cleared to zero. The total pressure on both sides is the sum of the first pressure on the operating side and the second pressure on the driving side. Increase the total pressure on both sides and control the roll gap of the current pinch roll to decrease from the second roll gap until the total pressure on both sides reaches the preset target pressure. Then stop decreasing the roll gap of the current pinch roll and increasing the total pressure on both sides, and control the current pinch roll to switch from the roll gap control mode to the pressure control mode, and the difference between the first pressure and the second pressure is less than the preset difference threshold, so that the current pinch roll enters the calibration state. The actual value of the roll gap corresponding to the current pinch roll in the calibration state is calibrated as the calibration value.
5. The method for calibrating the gap of the pinch rolls according to claim 4, characterized in that, The control of the current pinch roll gap to a preset first gap includes: The current pinch roll gap is controlled to open to the first roll gap at a preset first speed.
6. The method for calibrating the gap of the pinch roll according to claim 5, characterized in that, The control of reducing the gap of the current pinch roll from the first gap to a preset second gap includes: The gap between the current pinch rolls is controlled to decrease from the first gap to the second gap at a preset second speed; Wherein, the first speed is greater than the second speed.
7. The method for calibrating the gap of the pinch rolls according to claim 4, characterized in that, Increasing the total pressure on both sides and controlling the roll gap of the current pinch roll to decrease from the second roll gap includes: When the current pinch roll gap is the second gap, after a preset time, the total pressure on both sides is increased and the current pinch roll gap is controlled to decrease from the second gap.
8. A calibration device for the gap between pinch rolls, characterized in that, The device includes: The acquisition module is used to acquire the cumulative number of strips currently being fed by the pinch rolls; The determination module is used to determine the calibration value of the roll gap of the current pinch roll based on the cumulative number of blocks; The calibration module is used to control the current pinch roll to enter the calibration state and then calibrate the actual value of the roll gap corresponding to the current pinch roll in the calibration state as the calibration value.
9. An electronic device, characterized in that, include: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 1-7.
10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method of any one of claims 1-7.