A method and system for calibrating the width of a tire inner liner beveler, and an electronic device

Abstract

The application provides a tire inner liner bevel blade width calibration method and system and an electronic device, and the tire inner liner bevel blade includes a left bevel blade and a right bevel blade, and the method comprises the following steps: obtaining a target blade distance of the left bevel blade and the right bevel blade; driving the left bevel blade and the right bevel blade of the tire inner liner to move to a position corresponding to the target blade distance; obtaining an actual blade distance between the left bevel blade and the right bevel blade through online measurement; and according to a deviation between the actual blade distance and the target blade distance, controlling the left bevel blade and the right bevel blade to be adjusted cooperatively until the deviation meets a preset precision range. Through automatic acquisition of a target value, online measurement and closed-loop cooperative adjustment, the application realizes automation, high precision and real-time monitoring of the calibration process, significantly improves production efficiency and product quality consistency, and effectively prevents quality risks.

Description

Technical Field

[0001] This invention relates to the field of bevel blade width technology for tire liner, specifically to a calibration method, system, and electronic device for the bevel blade width of tire liner. Background Technology

[0002] In tire manufacturing, the inner liner is a crucial component for tire airtightness, and its width accuracy directly affects the quality of subsequent molding processes and the performance of the finished tire. The inner liner is typically produced by calendering a continuous sheet of rubber. After cooling and conveying, it needs to be cut to a fixed width using two opposing beveled blades to remove excess material and obtain a semi-finished product that meets specifications. During this cutting process, the distance between the tips of the two beveled blades, i.e., the blade spacing, directly determines the final width of the inner liner. Therefore, precise calibration of the blade spacing is a core element in ensuring product quality.

[0003] Currently, the industry still predominantly uses manual methods to calibrate the width of the bevel cutter. Operators typically measure the actual distance between the two cutter tips manually using calipers or a special template ruler while the equipment is stopped. Based on the difference between the measurement result and the required width, they estimate the adjustment amount based on experience. Then, they manually rotate the adjustment handwheels on both sides of the equipment to correct the position of the left and right bevel cutters one by one. After adjustment, the equipment must be started for a trial cut, and the cut product must be measured offline for verification. If it fails to meet the requirements, the above steps are repeated.

[0004] However, the existing calibration methods described above have many technical shortcomings. In the measurement stage, the manual use of calipers is highly dependent on the operator's skill level and operational standardization. Measurement benchmarks are difficult to standardize, and manual readings themselves contain errors, typically with an accuracy of only ±1mm, which cannot meet the high precision and consistency requirements of modern tire manufacturing. In the adjustment stage, operators must manually calculate the adjustment amount, and adjustments on both sides cannot be performed synchronously, easily leading to a shift in the cutting centerline, affecting the alignment accuracy of subsequent processes. Furthermore, after adjustment, a trial cut is required for verification, resulting in wasted time and materials. In addition, when producing tires of different specifications requires changing the cutting rollers, the mechanical benchmark of the entire cutting unit changes accordingly, necessitating the repetition of the tedious and time-consuming manual tool setting process, becoming a bottleneck restricting rapid changeover on the production line. More critically, existing technology cannot monitor the tool spacing in real time during production. Minor drifts caused by equipment vibration, thermal expansion and contraction, etc., cannot be detected and compensated for in a timely manner. When drift accumulates to a certain extent, it will cause the width of batch products to exceed tolerances, resulting in serious quality accidents.

[0005] Therefore, how to achieve rapid, accurate, and automated calibration of the bevel cutter width, and to perform real-time monitoring and dynamic compensation during the production process, is a technical problem that urgently needs to be solved by those skilled in the art.

[0006] Therefore, the existing technology still needs further development. Summary of the Invention

[0007] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a calibration method, system, and electronic device for the bevel width of the tire inner liner, so as to solve the problems existing in the prior art.

[0008] To achieve the above-mentioned technical objective, according to a first aspect of the present invention, the present invention provides a method for calibrating the width of the beveled edge cutter of a tire inner liner, wherein the beveled edge cutter of the inner liner includes a left beveled edge cutter and a right beveled edge cutter, the method comprising: S100: Obtain the target blade spacing between the left bevel blade and the right bevel blade, and drive the left bevel blade and the right bevel blade of the tire inner liner to move to a position corresponding to the target blade spacing; S200. Obtain the actual tool spacing between the left bevel tool and the right bevel tool through online measurement; S300. Based on the deviation between the actual tool spacing and the target tool spacing, control the left bevel tool and the right bevel tool to adjust in coordination until the deviation meets the preset accuracy range.

[0009] Specifically, the method for obtaining the target tool spacing between the left and right beveled tools includes: In response to a production order or an inner liner type roll change event, retrieve the process parameters associated with the current production order from the manufacturing execution system; The target tool spacing between the left and right beveled tools is calculated based on the process parameters.

[0010] Specifically, the process parameters include the working width of the forming roller, the tool compensation value, and the process compensation value. The target tool spacing is determined based on the working width of the forming roller and the preset tool compensation value and process compensation value. The target tool spacing is equal to the sum of the working width of the forming roller and twice the preset tool compensation value and process compensation value. The calculation method for the target tool spacing is as follows: Target blade spacing = working width of the forming roller + 2 × (tool compensation value + process compensation value).

[0011] Specifically, the method for obtaining the actual tool spacing between the left and right bevel tools through online measurement includes: The actual tool spacing between the left and right bevel tools is measured non-contactly using laser beam scanning or machine vision.

[0012] Specifically, the method for controlling the coordinated adjustment of the left and right bevel cutters based on the deviation between the actual cutter spacing and the target cutter spacing includes: Calculate the deviation between the actual tool spacing and the target tool spacing, and determine whether the absolute value of the deviation is greater than a first preset threshold according to a preset period. Based on the determination result, determine whether it is necessary to control the left bevel tool and the right bevel tool to move.

[0013] Specifically, the method for determining whether it is necessary to control the movement of the left and right bevel cutters based on the judgment result includes: If the absolute value of the deviation is greater than the first preset threshold, the compensation displacement required for the left bevel cutter and the right bevel cutter is calculated, and the left bevel cutter and the right bevel cutter are controlled to move symmetrically in opposite directions. In the next cycle, it is determined whether the absolute value of the deviation after the adjustment in the previous cycle is greater than the first preset threshold. If so, the left bevel cutter and the right bevel cutter are controlled to move symmetrically in opposite directions until the absolute value of the deviation is less than or equal to the first preset threshold. If the absolute value of the deviation is less than or equal to the first preset threshold, then the left bevel cutter and the right bevel cutter are not controlled to move symmetrically in opposite directions, and it is determined whether the absolute value of the deviation is greater than the second preset threshold. Based on the determination result, it is determined whether to control the left bevel cutter and the right bevel cutter to perform micro-compensation control. The second preset threshold is less than the first preset threshold.

[0014] Specifically, the method for determining whether the absolute value of the deviation is greater than a second preset threshold, and determining whether to control the left bevel cutter and the right bevel cutter for micro-compensation control based on the determination result, includes: If the absolute value of the deviation is greater than the second preset threshold, then control the left bevel cutter and the right bevel cutter to perform a slight compensation adjustment, and then determine whether the absolute value of the adjusted deviation is greater than the second preset threshold. If so, continue to control the left bevel cutter and the right bevel cutter to perform a slight compensation adjustment until the absolute value of the deviation is less than or equal to the second preset threshold. If the absolute value of the deviation is less than or equal to the second preset threshold, then the micro-compensation adjustment of the left bevel cutter and the right bevel cutter is not controlled.

[0015] Specifically, the calculation method for the compensation displacement is as follows: Calculate the adjustment amount for the left and right bevel cutters based on the deviation values; The left and right bevel blades have the same adjustment amount and opposite execution directions to reduce the blade spacing deviation while keeping the cutting center line position unchanged. The specific calculation method for the compensation displacement is as follows: Compensation displacement = deviation value / 2.

[0016] According to a second aspect of the present invention, a calibration system for the bevel width of a tire inner liner is provided, comprising: Acquisition module: used to acquire the target blade spacing between the left and right bevel blades of the inner lining layer bevel blade; Control module: Used to receive the target tool spacing and obtain the actual tool spacing between the left bevel tool and the right bevel tool through online measurement; Drive module: Used to control the left bevel cutter and the right bevel cutter to adjust in coordination according to the deviation between the actual cutter spacing and the target cutter spacing, until the deviation meets the preset accuracy range.

[0017] According to a third aspect of the present invention, an electronic device is provided, comprising: a memory; and a processor, wherein the memory stores computer-readable instructions, which, when executed by the processor, implement the above-described method for calibrating the width of the bevel blade of the tire inner liner.

[0018] Beneficial effects: This invention provides a calibration method and system for the bevel blade width of a tire inner liner, including obtaining the target blade spacing and driving the blade positioning, measuring the actual blade spacing online, and coordinating the adjustment of the inner liner bevel blade according to the deviation until the accuracy requirements are met. Compared with the open-loop control mode of the prior art that relies on manual stop measurement, manual calculation and adjustment, and trial cutting verification, the method of this invention realizes full automation of the calibration process. Online measurement replaces manual calipers, eliminating the problems of human reading errors and inconsistent measurement benchmarks, significantly improving calibration accuracy. The deviation-based coordinating adjustment mechanism can quickly converge to the target accuracy while keeping the cutting center line unchanged, avoiding material waste and time loss caused by repeated trial cutting. Thus, it improves calibration efficiency while ensuring the consistency of product width, and has the characteristics of wide applicability and high degree of automation. Attached Figure Description

[0019] Figure 1 This is a flowchart of a method for calibrating the width of the beveled edge blade of a tire inner liner provided in a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the composition of the calibration system for the bevel width of the tire inner liner provided in a specific embodiment of the present invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0021] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0022] Before providing a further detailed description of the embodiments of this application, some of the nouns and terms involved in the embodiments of this application will be explained. The nouns and terms involved in the embodiments of this application are subject to the following interpretations.

[0023] (1) Manufacturing Execution System (MES): refers to a production system used to track and record the transformation process from raw materials to finished products. In the embodiments of the present invention, the system is used to store and issue production orders, tire specifications, and process parameters associated with specific products. It is the data source and instruction starting point for realizing automated calibration.

[0024] (2) Coordinated adjustment: This refers to a control strategy in which the left and right beveled blades move synchronously and symmetrically according to a unified adjustment algorithm. The core purpose of this strategy is to accurately maintain the position of the cutting center line while adjusting the distance between the two blades (i.e., blade spacing), thereby ensuring that the cut inner lining layer is centered relative to the reference of the downstream process and avoiding the center offset problem caused by unilateral adjustment.

[0025] (3) First preset threshold: refers to the upper limit of deviation tolerance used to start the coarse adjustment program. When the absolute value of the deviation between the actual tool spacing and the target tool spacing measured online exceeds this value, it indicates that there is a relatively large error. The system will perform one or more large-scale adjustments based on symmetrical compensation displacement to quickly reduce the deviation and bring it into a smaller error range.

[0026] (4) Second preset threshold: refers to the upper limit of deviation tolerance used to start the fine-tuning or fine-tuning program, and its value is less than the first preset threshold. When the absolute value of the deviation is less than the first preset threshold but still greater than the second preset threshold, it indicates that the system has entered the high-precision convergence stage. At this time, the system will perform micro-compensation control to gradually approach the target value with extremely high resolution, and finally achieve high-precision calibration.

[0027] Example 1 Please see Figure 1This embodiment provides a method for calibrating the width of the bevel cutter in a tire inner liner. Generally, on a tire production line, the inner liner film needs to be precisely cut to a fixed width using a pair of opposing bevel cutters. This pair of bevel cutters includes a left bevel cutter and a right bevel cutter, and their positions together determine the cutting width. The specific method includes: obtaining the target cutter distance between the left and right bevel cutters; driving the left and right bevel cutters of the tire inner liner to move to a position corresponding to the target cutter distance; obtaining the actual cutter distance between the left and right bevel cutters through online measurement; and controlling the left and right bevel cutters to adjust collaboratively based on the deviation between the actual cutter distance and the target cutter distance until the deviation meets a preset accuracy range. This invention aims to solve the problems of low accuracy, poor efficiency, and inability to monitor in real time that exist in traditional manual calibration methods.

[0028] In a basic implementation, such as Figure 1 As shown, the specific execution steps of the calibration method in this embodiment are as follows: Step S100: Obtain the target blade spacing between the left and right bevel blades, and drive the left and right bevel blades to move to the position corresponding to the target blade spacing, i.e., the initial position. The target blade spacing is a theoretical value determined based on the inner liner width required by the tire specifications to be produced. After obtaining this value, the central controller calculates the coordinate positions of the left and right bevel blades respectively, and sends motion commands to the pre-set left and right servo motors. The servo motors then drive their respective connected bevel blades to the designated positions, completing the initial positioning.

[0029] Step S200: Obtain the actual tool spacing between the left and right bevel cutters through online measurement. After the bevel cutters are moved into position, to verify their accuracy, the system activates an online measuring device. This device can non-contactly and with high precision measure the physical distance between specific reference points of the two cutters; this measured value is the actual tool spacing. This step is crucial for achieving closed-loop control, providing accurate feedback on the system status and replacing the unreliable reliance on manual caliper measurements in traditional methods.

[0030] Step S300: Based on the deviation between the actual tool spacing and the target tool spacing, control the left and right bevel tools to adjust collaboratively until the deviation meets the preset accuracy range. The central controller compares the actual tool spacing measured in step S200 with the target tool spacing obtained in step S100, calculates the deviation value between the two, and if the deviation value exceeds the preset accuracy requirement (e.g., ±0.1mm), the system will start the collaborative adjustment program. This program will calculate the displacement to be compensated based on the magnitude and direction of the deviation, and drive the left and right servo motors again for synchronous and symmetrical fine-tuning. Then, steps S200 and S300 are repeated to form a closed-loop feedback control until the deviation between the measured actual tool spacing and the target tool spacing enters the allowable accuracy range, and the calibration process ends.

[0031] Understandably, the above method, by introducing online measurement and closed-loop feedback, transforms the original open-loop, manual adjustment process into an automated, quantifiable, and precise control process. Through the cycle of drive-measurement-comparison-compensation, it can automatically eliminate positioning inaccuracies caused by factors such as mechanical backlash and transmission errors, thereby significantly improving the calibration accuracy and reliability of the tool spacing. At the same time, the entire process requires no manual intervention, improving production efficiency and reducing reliance on operator skills.

[0032] In a preferred embodiment, the step S100 of obtaining the target tool spacing is specified, namely, in response to a production instruction or an inner liner type roll change event, process parameters associated with the current production order are retrieved from the manufacturing execution system, and the target tool spacing of the left bevel tool and the right bevel tool is calculated based on the process parameters.

[0033] Specifically, the triggering and execution of this step is deeply integrated with the factory's Manufacturing Execution System (MES). When a new production order is issued, or when a changeover event for the inner liner roll is triggered due to a change in product specifications, the central controller installed at the equipment end will automatically retrieve the process parameters associated with the current production order from the MES database through the MES interface. These parameters are standardized data predefined for each product specification.

[0034] Furthermore, the central controller calculates the target tool spacing of the left and right beveled blades based on the retrieved process parameters using a preset algorithm model. This method enables event triggering of calibration tasks and automated parameter distribution, avoiding errors that may arise from manual parameter querying and input. It ensures that the target width used in each production task is accurate, providing correct data input for the entire automated calibration process. This MES-linked technical solution seamlessly integrates equipment-level calibration actions with enterprise-level production planning management, achieving automation and intelligence in production preparation. When production plans change, the equipment can automatically and quickly adjust itself to adapt to the production requirements of new products, shortening changeover time and improving the flexibility and overall operating efficiency of the production line.

[0035] Based on the above embodiments, the process parameters specifically include the working width of the forming roller, the tool compensation value, and the process compensation value. The target tool spacing is determined based on the working width of the forming roller and the preset tool compensation value and process compensation value. The target tool spacing is equal to the sum of the working width of the forming roller and twice the preset tool compensation value and process compensation value, calculated as follows: Target cutter spacing = working width of the forming roller + 2 × (cutter compensation value + process compensation value); The forming roller working width refers to the effective working area width of the currently used forming roller. This value directly determines the main width of the inner liner layer and is provided by the MES system from the database based on the product model. The tool compensation value is a correction amount related to the tool geometry. For example, it considers the influence of factors such as the blade thickness and tilt angle of the beveled blade on the actual cutting trajectory. It is usually a preset constant and is typically obtained through equipment calibration. After equipment installation and debugging or tool replacement, the deviation between the actual cutting position and the theoretical position of the tool is calibrated using standard samples or laser measurement and stored in the MES system as a fixed parameter. The process compensation value is a dynamic correction amount related to material properties and production processes. For example, it is used to compensate for the natural shrinkage of rubber materials after cutting due to temperature changes or stress release. This value can be adjusted according to different rubber compound formulations, production line speeds, etc., and can even be adaptively learned and optimized through historical data. It is usually determined by process engineers based on material properties, historical production data, and test results and is stored in the MES system. It can be automatically retrieved with production orders or product specifications. The multiplication by 2 in the above formula is because the compensation value needs to be applied to both the left and right sides simultaneously.

[0036] Understandably, by calculating the target blade spacing using the above formula, an accurate physical model is established. This allows the final product width requirement to be pushed back to the blade setting value during equipment cutting, scientifically quantifying multiple key factors affecting the cutting width. This ensures that the target value setting no longer relies on the operator's experience estimation but is based on precise engineering calculations, thereby guaranteeing the accuracy of the calibration target from the source and laying a solid foundation for achieving high-precision cutting.

[0037] Furthermore, for step S200 of online measurement of the actual tool spacing, the present invention provides two preferred non-contact measurement schemes: The first scheme is to measure by laser beam transmission. In specific implementation, a pair of high-precision laser displacement sensors can be fixedly installed on the outer sides of the left and right beveled tools to form an online measurement device. One sensor acts as the transmitter and the other as the receiver. Its optical path is precisely aligned with and passes laterally through the reference point to be measured for the two tools. When the tools move, they will block part of the beam. By accurately measuring the width of the beam blocked by the left and right tools respectively, and combining it with the fixed total installation distance between the two sensors, the net distance between the two tools can be calculated. The calculation formula can be expressed as: ; in, To calculate the actual tool spacing, The fixed total distance between the two sensors is pre-calibrated. The obstruction width of the left beveled blade is measured by the left sensor. The obstruction width of the right beveled blade is measured by the sensor on the right side.

[0038] The second approach involves measurement using machine vision. In practice, one or more industrial cameras are mounted above the tool holder of the bevel cutter as an online measurement device. The camera's field of view must completely cover the working areas of both the left and right bevel cutters. The system uses image processing algorithms (such as edge detection, feature point recognition, or template matching) to precisely locate the pixel coordinates of the blade tips or specific marker points of the two bevel cutters in the captured image. Then, based on a pre-calibrated pixel equivalent (i.e., the actual physical size represented by each pixel), the pixel distance is converted into the actual physical distance. The calculation formula can be expressed as: ; in, To calculate the actual tool spacing, and These represent the pixel positions of the feature points of the right and left beveled edges in the image coordinate system, respectively. is the system's pixel equivalent coefficient, in millimeters per pixel.

[0039] Both of these non-contact measurement methods can achieve high-precision measurements at the sub-millimeter or even micrometer level, far exceeding the accuracy of manual measurements. At the same time, the measurement process is real-time and fast, and does not require contact with the tool, avoiding interference from the measuring tool on the tool position and eliminating human error by the operator. The laser beam method has strong environmental adaptability and stable accuracy, while the machine vision method is more flexible in function. In addition to distance measurement, it can also be used to monitor the condition of the tool tip, providing additional information for equipment maintenance.

[0040] In another preferred embodiment, the method for controlling the coordinated adjustment of the left and right bevel cutters based on the deviation between the actual cutter spacing and the target cutter spacing includes: calculating the deviation value between the actual cutter spacing and the target cutter spacing, and determining whether the absolute value of the deviation value is greater than a first preset threshold according to a preset period; determining whether it is necessary to control the left and right bevel cutters to move according to the determination result; if the absolute value of the deviation value is greater than the first preset threshold, calculating the compensation displacement required for the left and right bevel cutters to move, and controlling the left and right bevel cutters to move symmetrically in opposite directions; in the next period, continuing to determine whether the absolute value of the deviation value after adjustment in the previous period is greater than the first preset threshold; if so, continuing to control the left and right bevel cutters to move symmetrically in opposite directions until the absolute value of the deviation value is less than or equal to the first preset threshold; if the absolute value of the deviation value is less than or equal to the first preset threshold, not controlling the left and right bevel cutters to move symmetrically in opposite directions, and determining whether the absolute value of the deviation value is greater than a second preset threshold, wherein the second preset threshold is less than the first preset threshold; If the absolute value of the deviation is greater than the second preset threshold, then the left and right bevel cutters are controlled to make minor compensation adjustments. Then, it is determined whether the absolute value of the adjusted deviation is greater than the second preset threshold. If so, the left and right bevel cutters are controlled to make minor compensation adjustments until the absolute value of the deviation is less than or equal to the second preset threshold. If the absolute value of the deviation is less than or equal to the second preset threshold, the left and right bevel cutters are not controlled to make minor compensation adjustments.

[0041] The method for calculating the compensation displacement is to calculate the adjustment amount of the left and right bevel cutters separately based on the deviation value. The adjustment amount of the left and right bevel cutters is the same, and the execution direction is opposite, so as to reduce the blade spacing deviation while keeping the cutting center line position unchanged. The specific calculation method for the compensation displacement is as follows: Compensation displacement = deviation value / 2; It should be noted that the above technical solution has designed the internal logic of the collaborative adjustment step S300 in detail. First, the deviation value ΔD between the actual tool spacing and the target tool spacing is calculated. Then, the system makes a judgment according to a preset period (e.g., every 100 milliseconds). The preset period can be set according to the sampling capability and accuracy requirements of the control system, such as, but not limited to, 50ms to 500ms. The system judges whether the absolute value of the deviation value ΔD is greater than the first preset threshold. This judgment is the key to deciding whether to start a large adjustment. Furthermore, to ensure the stability of the adjustment process and the maintenance of the center line, the calculation of the compensation displacement follows the principle of symmetry. Specifically, the adjustment amounts of the left and right bevel cutters are the same, but the execution directions are opposite. This ensures that while adjusting the cutter spacing, the two cutters move symmetrically relative to the center line of the forming roller, thereby guaranteeing that the position of the cutting center line remains constant. The specific calculation method for the compensation displacement is: Compensation Displacement = Deviation Value / 2. The compensation displacement refers to the distance that a single-sided cutter needs to move, and the deviation value is ΔD. For example, if the deviation value is positive, meaning the actual spacing is too large, the calculated compensation displacement will be used to drive the left and right cutters to move that distance towards each other. If the deviation value is negative, meaning the actual spacing is too small, they will be driven to move that distance away from each other.

[0042] Understandably, the aforementioned collaborative adjustment strategy based on threshold judgment and symmetrical compensation establishes a clear and quantifiable closed-loop control rule. It can not only automatically correct deviations, but also ensure the quality of the adjustment process through a collaborative motion model, avoiding the centerline offset problem that is prone to occur in traditional manual adjustment. This is crucial for ensuring the alignment accuracy of subsequent processes.

[0043] To further improve the efficiency and accuracy of calibration, this invention adopts a two-stage adjustment strategy of coarse adjustment and fine adjustment. Specifically, after determining that the absolute value of the deviation value ΔD is greater than the first preset threshold, the system enters the coarse adjustment stage. In this stage, the central controller calculates the compensation displacement and controls the left and right bevel cutters to move symmetrically in opposite directions. After one control cycle ends, the system immediately remeasures and determines whether the absolute value of the new deviation value after adjustment is still greater than the first preset threshold in the next cycle. If so, the above coarse adjustment steps are continued until the absolute value of the deviation value is quickly corrected to be less than or equal to the first preset threshold. When the absolute value of the deviation is less than or equal to the first preset threshold, the coarse adjustment phase ends. At this point, the system does not immediately stop adjusting but enters the fine adjustment judgment phase. The system continues to judge whether the absolute value of the deviation is greater than a smaller second preset threshold. The second preset threshold defines a higher precision tolerance range. If the judgment result is yes, that is, the absolute value of the deviation is between the second preset threshold and the first preset threshold, the system starts micro-compensation control. Micro-compensation may use a smaller step size or a more refined PID control algorithm to make more subtle symmetrical movements of the left and right bevel cutters. After adjustment, the system judges again whether the new absolute value of the deviation is greater than the second preset threshold. If so, it continues fine adjustment until the absolute value of the deviation is finally less than or equal to the second preset threshold. If the absolute value of the deviation has been less than or equal to the second preset threshold from the beginning or after adjustment, the system determines that the calibration has reached the final accuracy requirement, does not make any movement, and the entire calibration process ends successfully.

[0044] See Figure 1 The working principle of the tire inner liner bevel blade width calibration method in this embodiment is illustrated below with a specific example: Taking the inner liner of an all-steel radial tire as an example, the model of the forming roller is Former-123, and its working width is recorded in the MES database. Among the tool parameters, the bevel angle is 30°, the insert thickness is 15mm, and the tool compensation amount has been calibrated. This value includes the geometric deviation between the cutting trajectory and the measurement position caused by the blade angle and thickness; the process parameters, namely the process shrinkage compensation amount obtained by the system through self-learning for the current butyl rubber liner formulation and production speed of 60 meters / minute. This refers to the shrinkage of the rubber compound from the cut point to the stable point; the system tolerance, i.e., the first preset threshold, is... The second preset threshold is The measurement system uses a high-precision laser rangefinder sensor with a measurement accuracy of ±0.02mm.

[0045] Phase 1: Target Calculation and Cooperative Motion Model Step 1: MES calculates the target tool spacing After receiving the production order, the MES automatically retrieves the form roller number Former-123 from the BOM and retrieves its working width from the database. At the same time, the process parameters of the current rubber compound formulation are called. and The target tool spacing is obtained as follows: ; In order to produce a film that fits an 800mm wide roller and allow for blade compensation and material shrinkage, the target distance between the tips of the two beveled blades should be precisely set to 807.40mm.

[0046] Step 2: PLC Cooperative Motion Control Assuming the machine's mechanical coordinate system has its origin O (0mm) at the center of the forming roller, and the target position of the left bevel cutter is located to the left of the origin with negative coordinates, The target position of the right-side oblique tool is located to the right of the origin, with positive coordinates. The PLC sends position commands to the left and right servo drives, driving the left bevel cutter to move to -403.70mm and the right bevel cutter to move synchronously to +403.70mm.

[0047] Phase Two: Closed-Loop Calibration Based on Direct Measurement Step 1: Measurement. The laser rangefinder sensor is activated to measure the actual distance between the tips of the two beveled blades. ; Step 2: Determine and calculate the deviation. ; To determine the tolerance, |ΔD|=0.15mm>δ=0.1mm, compensation is needed. A positive deviation indicates that the tool distance is too large. Step 3: Compensation calculation. Calculate the compensation amount required for each bevel cutter as follows: ΔX = ΔD / 2 = 0.15 / 2 = 0.075 mm; Since ΔD>0, the tool distance is too large, and the two tools need to move towards each other to reduce the distance; Step 4: Execution of Collaborative Compensation Let the current position of the bevel tool be... The position of the right diagonal knife is .

[0048] The new position of the left bevel tool needs to be moved to the right, that is, in the positive direction of the coordinate axis: ; The coordinates of the left bevel tool changed from -403.70 to -403.625, which actually means it moved 0.075mm to the right (positive direction). The right blade needs to be moved to the left, that is, moved in the negative direction of the coordinate axis: ; The coordinates of the right bevel tool changed from +403.70 to +403.625, which actually means it moved 0.075mm to the left (negative direction); PLC synchronously sends new position commands Provide separate drives for the left and right servo drivers; Step 5: Iterative verification. After the sensor moves into place, it measures again to obtain the result. The new deviation is calculated as follows: ; judge ,at the same time, Therefore, no further fine-tuning is needed, the calibration is successful, and the accuracy requirements are met.

[0049] Phase 3: Automatic calibration process when changing molding rollers The operator changed the forming roller from Former-123 (800mm wide) to Former-456, whose working width was changed from the database. .

[0050] Step 1: Event triggering. The operator clicks "Roll replacement complete" on the MES interface and scans the barcode "Former-456" for the new roll. The MES sends the roll replacement complete event and new width parameters to the PLC. Step 2: Baseline recovery. The PLC controls the two tools to safely move to a wider initial position, for example... , At this point, the tool spacing is 900mm; Step 3: Reference measurement, sensor measures initial tool distance This includes minute mechanical gaps and errors; Step 4: Automatic Centering (1) MES calculates the target cutter distance of the new type of roller: ; (2) Calculate the total displacement from the current position to the target position: A negative value indicates that the tool pitch needs to be narrowed. (3) Calculate the movement of each blade: MovePerKnife=TotalMove / 2=-142.65 / 2=-71.325mm; (4) Perform the movement to China: Left bevel cutter: -450.00 + 71.325 = -378.675 mm; Right bevel cutter: +450.00 -71.325) = +378.675mm; Step 5: Fine-tuning and verification. After the centering movement is completed, the system immediately enters the second stage (closed-loop calibration) process. (1) Measure the current tool distance ; (2) Judgment and compensation: ΔD = 757.60 - 757.40 = 0.2 mm; ΔX = 0.20 / 2 = 0.10 mm; Perform coordinated compensation: the left beveled cutter moves 0.10mm to the right to -378.575mm, and the right beveled cutter moves 0.10mm to the left to +378.575mm.

[0051] (3) Measure and verify again to obtain The deviation is +0.02mm, which is within the tolerance range. The calibration is complete. The system records the new roller Former-456. The calibration is complete. The final cutter distance is 757.42mm, which meets the target of 757.40mm. The operator can start production immediately. The whole process does not require manual measurement, calculation or manual adjustment.

[0052] It should be noted that this embodiment provides a method for calibrating the width of the beveled edge of a tire inner liner. This two-stage threshold control scheme balances adjustment speed and accuracy. The coarse adjustment stage uses a larger step size to quickly converge large initial errors, saving time. The fine adjustment stage uses a very small step size to fine-tune residual minor errors, ensuring the final result achieves high accuracy. This makes the entire automated calibration process more efficient and precise.

[0053] Example 2 In one alternative implementation, please refer to Figure 2 , Figure 2 This is a functional block diagram of a tire inner liner bevel blade width calibration system provided in an embodiment of the present invention. Functionally, the system can be divided into an acquisition module 100, a control module 200, and a drive module 300. The acquisition module 100 acquires the target blade spacing between the left and right bevel blades of the inner liner. The control module 200 receives the target blade spacing and acquires the actual blade spacing between the left and right bevel blades through online measurement. The drive module 300 controls the left and right bevel blades to adjust collaboratively based on the deviation between the actual blade spacing and the target blade spacing until the deviation meets a preset accuracy range. The collaboration between these functional modules constitutes the logical core of the automated calibration method of the present invention.

[0054] In one specific embodiment, the system includes an acquisition module 100, a control module 200, and a drive module 300, the functions of which are implemented through specific hardware entities.

[0055] Specifically, the acquisition module 100 is used to acquire the target tool spacing of the left and right beveled edges of the inner liner beveled edge tool. This module can be physically composed of a MES interface and a human-machine interface (HMI). The central controller receives production instructions and process parameters from the manufacturing execution system through the MES interface, or receives changeover confirmation instructions from the operator through the HMI, and calculates the target tool spacing accordingly.

[0056] The control module 200 is used to receive the target tool spacing and obtain the actual tool spacing between the left bevel tool and the right bevel tool through online measurement. The core of this module is the central controller, which can be a high-performance PLC or industrial computer. It receives real-time measurement data, i.e. the actual tool spacing, from online measuring devices such as laser sensors or industrial cameras.

[0057] The drive module 300 is used to control the left and right bevel cutters to adjust collaboratively based on the deviation between the actual cutter spacing and the target cutter spacing, until the deviation meets a preset accuracy range. This module consists of a left servo motor and a right servo motor. The central controller internally executes control algorithms such as deviation calculation, threshold judgment, and compensation calculation, and then generates precise motion control commands, which are sent to the left and right servo motors respectively to drive the left and right bevel cutters to complete precise collaborative movement.

[0058] The following will describe the workflow of a specific embodiment of the present invention through a complete application example, taking the roll change of the inner liner of an all-steel radial tire as an example. Switching from tire model A to tire model B triggers a roll change event: First, the operator confirms on the human-machine interface (HMI) that the new roller has been replaced with a new type of roller suitable for tire model B. This event is reported through the MES interface, and the central controller then retrieves the process parameters of tire model B from the MES system, including the working width of the new roller 750mm, the tool compensation value 2.5mm, and the process compensation value 1.2mm. Next, the central controller calculates the target tool spacing according to the formula Target Tool Spacing = 750 + 2 × (2.5 + 1.2) = 757.40 mm. At the same time, the controller drives the left servo motor and the right servo motor to move the left and right beveled tools symmetrically to the vicinity of the target position. Subsequently, the laser-guided online measuring device mounted on the tool holder is activated, and the initial actual tool spacing is measured to be 757.80mm. The central controller calculates the deviation ΔD = 757.80 - 757.40 = +0.40mm. The controller determines that the absolute value of the deviation |ΔD| = 0.40mm. Assuming that the first preset threshold is 0.1mm and the second preset threshold is 0.02mm, since 0.40mm > 0.1mm, the system enters the coarse adjustment stage. The controller calculates that the tool on each side needs to move 0.20mm towards each other according to the formula compensation displacement = 0.40 / 2 = 0.20mm. After the command is issued, the left and right servo motors execute the movement synchronously and symmetrically. After the movement is completed, the online measuring device measures again and obtains a new actual tool spacing of 757.43mm; the new deviation ΔD' = 757.43 - 757.40 = +0.03mm. At this time, the absolute value of the deviation |ΔD'| = 0.03mm. This value is less than the first preset threshold of 0.1mm, but still greater than the second preset threshold of 0.02mm. The system automatically switches to the fine-tuning stage. During the fine-tuning stage, the controller performs micro-compensation control and calculates that the displacement to be compensated is 0.03 / 2=0.015mm. The controller then drives the servo motor with higher precision, causing the two tools to move towards each other by another 0.015mm. The final measurement showed that the actual tool spacing was 757.40 mm with a deviation of 0. This value is less than or equal to the second preset threshold of 0.02 mm. The calibration was completed, and the central controller displayed the calibration completion on the HMI, indicating that production could begin. The calibration results were also recorded in the MES system. The entire process was completed automatically without any manual measurement or adjustment.

[0059] It should be noted that this embodiment provides a tire inner liner bevel cutter width calibration system, including an acquisition module 100, a control module 200, and a drive module 300. This system achieves fully automatic, rapid, and high-precision calibration of the tire inner liner bevel cutter width, possessing a high degree of automation. It enables automated and unmanned calibration during the changeover process, further improving production efficiency. Through real-time closed-loop control, it ensures a high degree of consistency and stability of product width during production. Furthermore, the primary application scenario of this invention is the inner liner production line in the tire manufacturing industry. It is a technical solution suitable for the tire manufacturing industry, contributing to the intelligent and digital transformation of tire production.

[0060] Example 3 In a preferred embodiment, this application also provides an electronic device, the electronic device comprising: The computer device includes a memory and a processor. The memory stores computer-readable instructions that, when executed by the processor, implement the tire inner liner bevel blade width calibration method. This computer device can be broadly categorized as a server, terminal, or any other electronic device with the necessary computing and / or processing capabilities. In one embodiment, the computer device may include a processor, memory, network interface, communication interface, etc., connected via a system bus. The processor of the computer device can be used to provide the necessary computing, processing, and / or control capabilities. The memory of the computer device may include a non-volatile storage medium and internal memory. The non-volatile storage medium may store an operating system, computer programs, etc. The internal memory can provide an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface and communication interface of the computer device can be used to connect and communicate with external devices via a network. When the computer program is executed by the processor, it performs the steps of the method of the present invention.

[0061] This invention can be implemented as a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, causes the steps of the methods of embodiments of the invention to be performed. In one embodiment, the computer program is distributed across multiple network-coupled computer devices or processors, such that the computer program is stored, accessed, and executed in a distributed manner by one or more computer devices or processors. A single method step / operation, or two or more method steps / operations, may be executed by a single computer device or processor or by two or more computer devices or processors. One or more method steps / operations may be executed by one or more computer devices or processors, and one or more other method steps / operations may be executed by one or more other computer devices or processors. One or more computer devices or processors may execute a single method step / operation, or execute two or more method steps / operations.

[0062] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0063] The technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, provided that such combination does not contain contradictions.

[0064] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for calibrating the width of the beveled edge cutter in a tire inner liner, wherein the beveled edge cutter includes a left beveled edge cutter and a right beveled edge cutter, characterized in that, include: S100: Obtain the target blade spacing between the left bevel blade and the right bevel blade, and drive the left bevel blade and the right bevel blade of the tire inner liner to move to a position corresponding to the target blade spacing; S200. Obtain the actual tool spacing between the left bevel tool and the right bevel tool through online measurement; S300. Based on the deviation between the actual tool spacing and the target tool spacing, control the left bevel tool and the right bevel tool to adjust in coordination until the deviation meets the preset accuracy range.

2. The calibration method for the width of the beveled edge of the tire inner liner according to claim 1, characterized in that, The method for obtaining the target tool spacing between the left and right beveled tools includes: In response to a production order or an inner liner type roll change event, retrieve the process parameters associated with the current production order from the manufacturing execution system; The target tool spacing between the left and right beveled tools is calculated based on the process parameters.

3. The calibration method for the width of the beveled edge of the tire inner liner according to claim 2, characterized in that, The process parameters include the working width of the forming roller, the tool compensation value, and the process compensation value. The target tool spacing is determined based on the working width of the forming roller and the preset tool compensation value and process compensation value. Specifically, the target tool spacing is equal to the sum of the working width of the forming roller and twice the preset tool compensation value and process compensation value. The calculation method for the target tool spacing is as follows: Target blade spacing = working width of the forming roller + 2 × (tool compensation value + process compensation value).

4. The calibration method for the width of the beveled edge of the tire inner liner according to claim 1, characterized in that, The method for obtaining the actual tool spacing between the left and right bevel tools through online measurement includes: The actual tool spacing between the left and right bevel tools is measured non-contactly using laser beam scanning or machine vision.

5. The calibration method for the width of the beveled edge of the tire inner liner according to claim 1, characterized in that, The method for controlling the coordinated adjustment of the left and right bevel cutters based on the deviation between the actual cutter spacing and the target cutter spacing includes: Calculate the deviation between the actual tool spacing and the target tool spacing, and determine whether the absolute value of the deviation is greater than a first preset threshold according to a preset period. Based on the determination result, determine whether it is necessary to control the left bevel tool and the right bevel tool to move.

6. The method for calibrating the width of the beveled edge of the tire inner liner according to claim 5, characterized in that, The method for determining whether it is necessary to control the movement of the left and right bevel cutters based on the judgment result includes: If the absolute value of the deviation is greater than the first preset threshold, the compensation displacement required for the left bevel cutter and the right bevel cutter is calculated, and the left bevel cutter and the right bevel cutter are controlled to move symmetrically in opposite directions. In the next cycle, it is determined whether the absolute value of the deviation after the adjustment in the previous cycle is greater than the first preset threshold. If so, the left bevel cutter and the right bevel cutter are controlled to move symmetrically in opposite directions until the absolute value of the deviation is less than or equal to the first preset threshold. If the absolute value of the deviation is less than or equal to the first preset threshold, then the left bevel cutter and the right bevel cutter are not controlled to move symmetrically in opposite directions, and it is determined whether the absolute value of the deviation is greater than the second preset threshold. Based on the determination result, it is determined whether to control the left bevel cutter and the right bevel cutter to perform micro-compensation control. The second preset threshold is less than the first preset threshold.

7. The calibration method for the width of the beveled edge of the tire inner liner according to claim 6, characterized in that, The method for determining whether the absolute value of the deviation is greater than a second preset threshold, and determining whether to control the left bevel cutter and the right bevel cutter for micro-compensation control based on the determination result, includes: If the absolute value of the deviation is greater than the second preset threshold, then control the left bevel cutter and the right bevel cutter to perform a slight compensation adjustment, and then determine whether the absolute value of the adjusted deviation is greater than the second preset threshold. If so, continue to control the left bevel cutter and the right bevel cutter to perform a slight compensation adjustment until the absolute value of the deviation is less than or equal to the second preset threshold. If the absolute value of the deviation is less than or equal to the second preset threshold, then the micro-compensation adjustment of the left bevel cutter and the right bevel cutter is not controlled.

8. The calibration method for the width of the beveled edge of the tire inner liner according to claim 6, characterized in that, The method for calculating the compensation displacement is as follows: Calculate the adjustment amount for the left and right bevel cutters based on the deviation values; The left and right bevel blades have the same adjustment amount and opposite execution directions to reduce the blade spacing deviation while keeping the cutting center line position unchanged. The specific calculation method for the compensation displacement is as follows: Compensation displacement = deviation value / 2.

9. A calibration system for the width of the beveled edge of a tire inner liner, characterized in that, include: Acquisition module: used to acquire the target blade spacing between the left and right bevel blades of the inner lining layer bevel blade; Control module: Used to receive the target tool spacing and obtain the actual tool spacing between the left bevel tool and the right bevel tool through online measurement; Drive module: Used to control the left bevel cutter and the right bevel cutter to adjust in coordination according to the deviation between the actual cutter spacing and the target cutter spacing, until the deviation meets the preset accuracy range.

10. An electronic device, characterized in that, include: Memory; The processor, wherein the memory stores computer-readable instructions that, when executed by the processor, implement the calibration method for the bevel width of the tire inner liner according to any one of claims 1 to 8.

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