Cover cutting method and system for notebooks of various sizes

Abstract

This invention discloses a method and system for cutting covers of notebooks in various sizes, belonging to the field of cutting process optimization technology. It includes: acquiring material characteristic parameters of the laminated cover of the notebook to be cut, and acquiring cutting state parameters of the cutting equipment during the cutting process; based on tool displacement data, identifying the first tool displacement corresponding to the moment the laminate breaks and the second tool displacement corresponding to the moment the paper base breaks, and calculating the surface slip of the laminate and the interlayer asynchronous breakage difference based on the lateral displacement of the material; acquiring the laminate peeling sensitivity based on the laminate thickness and peeling strength, and calculating the comprehensive adjustment index for laminate cutting based on the surface slip, interlayer asynchronous breakage difference, and laminate peeling sensitivity; and iteratively optimizing based on the comprehensive adjustment index to generate a cutting process adjustment scheme. This invention improves the cutting adaptability and finished product processing quality of laminated covers for notebooks in various sizes.

Description

Technical Field

[0001] This invention relates to the field of cutting process optimization technology, specifically to a method and system for cutting the cover of notebooks of various sizes. Background Technology

[0002] In the existing notebook cover cutting process, traditional cutting operations mostly use fixed process parameters for production. When faced with notebook covers of different sizes, the pressure of pressing paper, cutting speed and cutting angle are usually set uniformly by human experience, and the cutting operation is carried out in accordance with the established standard process.

[0003] However, the fixed process parameters under the traditional cutting mode are difficult to adapt to the material differences and size variations of multi-specification notebook laminated covers. During the cutting process, the laminated layer and the paper base layer are prone to relative slippage and asynchronous breakage, which can easily cause irregular cut edges and peeling of the laminate, making it difficult to meet the uniform cutting quality standards of multi-specification products. Summary of the Invention

[0004] This invention provides a method and system for cutting the cover of notebooks of various sizes, aiming to solve the technical problems of poor adaptability and poor cutting quality of laminated covers for notebooks of various sizes in the prior art.

[0005] In view of the above problems, the present invention provides a method and system for cutting the cover of notebooks of various sizes.

[0006] In a first aspect, the present invention provides a cover cutting method for notebooks of various sizes, including: Obtain the material characteristic parameters of the notebook cover to be cut and the cutting status parameters of the cutting device during the cutting process. The material characteristic parameters include the thickness of the cover and the peel strength of the cover, and the cutting status parameters include the tool displacement data and the lateral displacement of the material. Based on the tool displacement data, the first tool displacement corresponding to the fracture time of the coating layer and the second tool displacement corresponding to the fracture time of the paper base layer are identified, and based on the lateral displacement of the material, the slip degree of the coating surface and the difference in asynchronous fracture between layers are calculated. The coating peel sensitivity is obtained based on the coating layer thickness and the coating peel strength, and the coating cutting comprehensive adjustment index is calculated based on the coating surface slip, the interlayer asynchronous fracture difference and the coating peel sensitivity. The cutting process adjustment scheme is generated by iterative optimization based on the comprehensive adjustment index of the film-coated cutting process. The cutting process adjustment scheme includes at least one of the following: adjustment amount of paper pressing pressure, adjustment amount of cutting speed, and adjustment amount of cutting angle.

[0007] Secondly, the present invention provides a cover cutting system for notebooks of various sizes, including: The cutting parameter acquisition module is used to acquire the material characteristic parameters of the notebook cover to be cut and the cutting status parameters of the cutting device during the cutting process. The material characteristic parameters include the cover thickness and the cover peel strength, and the cutting status parameters include the tool displacement data and the material lateral displacement. The fracture slip calculation module is used to identify the first tool displacement corresponding to the fracture time of the coating layer and the second tool displacement corresponding to the fracture time of the paper base layer based on the tool displacement data, and to calculate and obtain the slip degree of the coating surface and the difference in asynchronous fracture between layers based on the lateral displacement of the material. The adjustment index calculation module is used to obtain the coating peel sensitivity based on the coating layer thickness and the coating peel strength, and to calculate the coating cutting comprehensive adjustment index based on the coating surface slip, the interlayer asynchronous fracture difference and the coating peel sensitivity. The process scheme generation module is used to iteratively optimize the comprehensive adjustment index of film cutting and generate a cutting process adjustment scheme. The cutting process adjustment scheme includes at least one of the following: adjustment amount of paper pressing pressure, adjustment amount of cutting speed, and adjustment amount of cutting angle.

[0008] One or more technical solutions provided in this invention have at least the following technical effects or advantages: This invention provides a method and system for cutting notebook covers of various sizes. By collecting tool displacement data and material lateral displacement during the cutting process, the method first identifies the tool displacement corresponding to the fracture time of the lamination layer and the fracture time of the paper base layer, calculates the slippage degree of the lamination surface and the difference in asynchronous interlayer fracture, and quantifies the degree of asynchronous fracture between the lamination and the paper. Based on this, the lamination peel sensitivity is obtained by combining the lamination layer thickness and lamination peel strength, and the comprehensive adjustment index for lamination cutting is further calculated. The comprehensive adjustment index for lamination cutting is used for iterative optimization to automatically generate adjustment schemes for paper pressing pressure, cutting speed, and cutting angle, thereby dynamically matching the optimal cutting parameters for lamination covers of different sizes, effectively suppressing lamination slippage and asynchronous interlayer fracture, and improving the quality of the cut edges. Attached Figure Description

[0009] Figure 1 A flowchart illustrating the cover cutting method for notebooks of various sizes provided in an embodiment of the present invention; Figure 2 A schematic diagram of the overall logic of the cover cutting method for notebooks of various sizes provided in an embodiment of the present invention; Figure 3 A schematic diagram of the cover cutting system for notebooks of various sizes provided in an embodiment of the present invention; The components represented by each number in the attached diagram are explained below: Cutting parameter acquisition module 11, fracture slip calculation module 12, adjustment index calculation module 13, process scheme generation module 14. Detailed Implementation

[0010] This invention provides a method and system for cutting the cover of notebooks of various sizes, which is used to solve the technical problems of poor adaptability and poor cutting quality of laminated covers for notebooks of various sizes in the prior art.

[0011] Example 1, as Figure 1 , Figure 2 As shown, this invention provides a cover cutting method for notebooks of various sizes, the method comprising: S100: Obtain the material characteristic parameters of the notebook cover to be cut and the cutting status parameters of the cutting device during the cutting process. The material characteristic parameters include the thickness of the cover and the peel strength of the cover, and the cutting status parameters include the tool displacement data and the lateral displacement of the material.

[0012] In the notebook cover cutting process, the laminated cover is composed of a paper base layer and a surface laminating layer. The thickness of the laminating layer, the peel strength between the laminating layer and the paper base layer, as well as the tool displacement and lateral displacement of the laminated cover material generated during the cutting process, all affect the cutting quality. Different laminating layer thicknesses will cause variations in the film-breaking force required when the tool enters the paper; the peel strength reflects the degree of adhesion between the laminating layer and the paper base layer; the torque variation in the tool displacement data can reflect the moment when the laminating layer and the paper base layer break separately; and the lateral displacement of the material reflects the degree of slippage of the laminating layer relative to the paper base layer under the pressure of the tool.

[0013] Therefore, before implementing any adjustments to the cutting parameters, it is necessary to accurately obtain the aforementioned material characteristic parameters and cutting state parameters to provide basic data for subsequent calculations of coating surface slip, interlayer asynchronous fracture difference, and coating cutting comprehensive adjustment index.

[0014] Step S100 in the method provided in this embodiment of the invention includes: Obtain the material characteristic parameters of the notebook cover to be cut, wherein the material characteristic parameters include the thickness of the cover layer and the peel strength of the cover; The cutting status parameters of the cutting equipment during the cutting process are obtained, wherein the cutting status parameters include tool displacement data and material lateral displacement, and the tool displacement data includes torque-displacement sequence.

[0015] First, obtain the material characteristic parameters of the notebook cover to be cut, including the film thickness and peel strength. The film thickness refers to the vertical dimension of the plastic film layer covering the surface of the notebook cover paper base. The film thickness directly affects the film breaking resistance that the cutting tool needs to overcome. The peel strength refers to the force required per unit width to peel the film layer from the paper base surface at a certain angle and speed. The peel strength characterizes the adhesion between the film and the paper.

[0016] Specifically, a thickness gauge is used to directly measure the thickness of the laminated cover of the notebook to be cut. For peel strength, a peel strength tester is used, sampling is taken from the corner of the laminated cover using the 180° peel method, and the force required to peel the laminated layer from the paper substrate per unit width is measured. If a material specification sheet from the supplier is available for the current batch of laminated covers, the laminated layer thickness and peel strength values ​​specified in the specification sheet are directly read. During continuous production on the cutting equipment, a measurement can be performed each time a batch is changed, and the measured values ​​are entered into the control unit of the cutting equipment for storage.

[0017] For example, taking a batch of A4-sized notebook covers with a polypropylene (PP) film as an example, the film thickness was measured to be 0.025 mm using a digital thickness gauge. A 25 mm wide sample was cut from the corner of the cover using a 180° peel strength tester and peeled at a speed of 300 mm per minute. The measured peel force was 2.5 N. Therefore, the film peel strength = 2.5 N / 25 mm = 0.1 N / mm. The film thickness of 0.025 mm and the film peel strength of 0.1 N / mm were recorded as material characteristic parameters for the current batch of covers.

[0018] Secondly, the cutting state parameters of the cutting equipment during the cutting process are obtained. These parameters include tool displacement data and material lateral displacement. The tool displacement data includes a torque-displacement sequence. Tool displacement data refers to the relationship between the vertical movement distance of the cutting tool from its initial position to the completion of the cutting process and the torque experienced by the cutting mechanism at the corresponding moment. Specifically, it is a torque-displacement sequence, which is a set of data pairs recorded at fixed sampling intervals. Each data pair contains a displacement value and the corresponding torque value at that displacement. Material lateral displacement refers to the displacement of the laminated cover material in the direction perpendicular to the preset cutter line (i.e., horizontal lateral direction) after the paper presser presses the laminated cover onto the worktable and before the cutting tool contacts the laminated cover. This lateral material displacement is caused by the imbalance between friction and tension on the laminated surface when the tool presses down.

[0019] Specifically, displacement and torque sensors are installed on the spindle of the cutting equipment, with a sampling frequency set to 1000 times per second. After the cutting process starts, the sensors collect the displacement and corresponding torque values ​​of the cutter moving downwards from its highest point in real time, forming a torque-displacement sequence. Simultaneously, micro-markers are pasted on the upper surface of the laminated cover, at lateral positions near both sides of the cutting line. Two high-speed cameras are installed above the cutting equipment to capture the movement of the markers from two different angles. After the paper pressurer presses down and stabilizes, image acquisition begins until the cutter completes the cutting. Image processing algorithms are used to calculate the pixel displacement of the markers in the horizontal direction, converting it into the actual lateral displacement. The average absolute value of the displacement of the markers on both sides of the cutting line is taken as the lateral displacement of the material.

[0020] For example, the spindle displacement sensor and torque sensor of the cutting device sample 1000 times per second and record a set of torque-displacement sequences, such as: the torque is 0 N·m when the displacement is 0 mm; the torque is 0.2 N·m when the displacement is 0.5 mm; the torque suddenly jumps to 0.9 N·m when the displacement is 1.2 mm; the torque jumps to 1.5 N·m again when the displacement is 1.8 mm; and then the torque tends to stabilize.

[0021] On the upper surface of the laminated cover, 3mm to the left and 3mm to the right of the preset cutting line, attach two circular reflective markers with a diameter of 0.5mm each. Two high-speed cameras with a frame rate of 2000 frames per second are mounted above the cutting equipment. After the paper pressure plater presses down and stabilizes, the cameras begin to capture images. From the captured image sequence, the horizontal displacement of the left marker is calculated to be 0.08mm, and the right marker's displacement is 0.10mm. The average horizontal displacement of the material is calculated to be 0.09mm.

[0022] In this embodiment of the invention, the thickness and peel strength of the laminated cover of the notebook to be cut, as well as the tool displacement data and material lateral displacement during the cutting process, were obtained. These parameters form the initial data basis for subsequent calculations of the laminate surface slippage, interlayer asynchronous fracture difference, and laminate peel sensitivity. The laminate thickness and peel strength are inherent material properties; the tool displacement data accurately reflects the difference in the timing of laminate breakage and paper base layer breakage; and the material lateral displacement directly quantifies the degree of laminate slippage during the cutting process. These parameters provide reliable data input for adaptive cutting control of notebook covers of various sizes.

[0023] S200: Based on the tool displacement data, identify the first tool displacement corresponding to the moment the coating layer breaks and the second tool displacement corresponding to the moment the paper base layer breaks, and calculate the slip degree of the coating surface and the difference in asynchronous breakage between layers based on the lateral displacement of the material.

[0024] During the cutting process, the laminating layer fractures before the paper base layer, manifested as two consecutive torque surges in the cutter displacement sequence. By identifying the first cutter displacement corresponding to the first torque surge and the second cutter displacement corresponding to the second torque surge, the degree of asynchrony between the two layer fractures can be quantified. When the cutter presses down, the laminating layer undergoes lateral slippage, and this slippage, along with the laminating layer thickness, affects the positioning deviation. Simultaneously, the displacement difference between the two fractured layers directly correlates with the risk of delamination. Therefore, based on the acquired cutter displacement data and the amount of lateral material displacement, it is necessary to calculate the laminating surface slippage and the difference in asynchronous interlayer fracture, providing a basis for subsequent adjustments to the cutting process.

[0025] Step S200 in the method provided in this embodiment of the invention includes: Based on the tool displacement data, the torque change at adjacent sampling times is calculated. The tool displacement corresponding to the first torque surge is identified as the first tool displacement, and the tool displacement corresponding to the second torque surge is identified as the second tool displacement. The first torque surge corresponds to the instant of the film layer breaking, and the second torque surge corresponds to the instant of the paper base layer breaking. The amount of lateral material displacement of the laminated cover in the direction perpendicular to the preset cut line is obtained after the paper presser of the cutting device is pressed down and before the cutting blade contacts the laminated cover. Calculate the ratio of the lateral displacement of the material to the thickness of the coating layer to obtain the slip ratio of the coating surface; The difference between the second tool displacement and the first tool displacement is divided by the average of the first tool displacement and the second tool displacement to obtain the interlayer asynchronous fracture difference value.

[0026] First, based on the tool displacement data, the torque change at adjacent sampling times is calculated. The tool displacement corresponding to the first torque surge is identified as the first tool displacement, and the tool displacement corresponding to the second torque surge is identified as the second tool displacement. The first torque surge corresponds to the instant of the coating layer breaking, and the second torque surge corresponds to the instant of the paper base layer breaking.

[0027] The first cutter displacement refers to the vertical displacement value of the cutting tool at the instant the coating layer breaks, which is represented by the first torque surge in the torque-displacement sequence. The second cutter displacement refers to the vertical displacement value of the cutting tool at the instant the paper base layer breaks, which is represented by the second torque surge in the torque-displacement sequence. A torque surge refers to a sudden change in torque between adjacent sampling times that exceeds a preset threshold and the direction of change is positive.

[0028] Specifically, from the torque-displacement sequence obtained in step S100, the torque change between two adjacent sampling points is calculated sequentially according to the sampling order. Torque change = torque value of the next sampling point - torque value of the previous sampling point. All calculated torque changes are sorted according to the sampling time. Starting from the beginning of the sequence, the tool displacement value corresponding to the moment when the first torque change exceeds a preset change threshold is identified as the first tool displacement. Continuing to search forward, the tool displacement value corresponding to the moment when the next torque change exceeds the same preset change threshold is identified as the second tool displacement. If there is no second torque surge in the sequence, it indicates that the paper base layer did not experience typical breakage during the cutting process; in this case, the maximum displacement value at the end of the sequence is taken as the second tool displacement.

[0029] For example, the torque-displacement sequence is as follows: torque is 0 N·m when displacement is 0 mm; torque is 0.2 N·m when displacement is 0.5 mm, with a torque change of 0.2 N·m; torque is 0.9 N·m when displacement is 1.2 mm, with a torque change of 0.7 N·m; torque is 1.5 N·m when displacement is 1.8 mm, with a torque change of 0.6 N·m. The preset change threshold is 0.5 N·m. The first torque change exceeding 0.5 N·m occurs at displacement 1.2 mm, therefore the first tool displacement is identified as 1.2 mm. The second torque surge occurs at displacement 1.8 mm, therefore the second tool displacement is identified as 1.8 mm.

[0030] Secondly, the lateral displacement of the laminated cover material in the direction perpendicular to the preset cut line is obtained after the paper pressurer of the cutting device presses down and before the cutting blade contacts the laminated cover. The lateral displacement refers to the horizontal displacement of the laminated cover in the direction perpendicular to the preset cut line after the paper pressurer presses down and before the cutting blade contacts the laminated cover. This value has already been measured in step S100 and is obtained directly here. For example, the lateral displacement is 0.09 mm.

[0031] Next, calculate the ratio of the lateral displacement of the material to the thickness of the coating layer to obtain the surface slip of the coating. Surface slip of the coating = lateral displacement of the material / thickness of the coating layer. A larger surface slip indicates a more severe cutting and positioning deviation due to low friction on the coating surface. The thicker the coating layer, the smaller the slip per unit thickness, and the smaller the surface slip of the coating; conversely, the thinner the coating layer, the larger the slip per unit thickness, and the larger the surface slip of the coating.

[0032] For example, given that the lateral displacement of the material is 0.09 mm and the coating thickness is 0.025 mm, the surface slip of the coating is 0.09 mm / 0.025 mm = 3.6. Therefore, the surface slip of the PP coating in this batch is 3.6.

[0033] Finally, the difference between the second tool displacement and the first tool displacement is divided by the average of the first and second tool displacements to obtain the interlayer asynchronous breakage difference. Interlayer asynchronous breakage difference = (second tool displacement - first tool displacement) / [(first tool displacement + second tool displacement) / 2], with a value range of 0-2. A larger interlayer asynchronous breakage difference indicates a more severe degree of asynchrony between the laminating layer and the paper base layer, resulting in a higher risk of delamination or edge curling. The thicker the laminating layer, the greater the total amount of laminating stretching, and the larger the interlayer asynchronous breakage difference; conversely, the thinner the laminating layer, the smaller the total stretching, and the smaller the interlayer asynchronous breakage difference.

[0034] For example, the displacement of the first tool is known to be 1.2 mm, and the displacement of the second tool is known to be 1.8 mm; the interlayer asynchronous fracture difference is calculated as (1.8 - 1.2) / [(1.2 + 1.8) / 2] = 0.4. Therefore, the interlayer asynchronous fracture difference of this batch of PP film covers is 0.4.

[0035] In this embodiment of the invention, the first tool displacement corresponding to the fracture moment of the coating layer and the second tool displacement corresponding to the fracture moment of the paper base layer are accurately identified from the tool displacement data obtained in S100. Based on the lateral displacement of the material, the coating surface slippage and the interlayer asynchronous fracture difference are calculated. The coating surface slippage directly quantifies the degree of lateral slippage of the coating during the cutting process; a larger value indicates a more severe positioning deviation caused by slippage. The interlayer asynchronous fracture difference directly quantifies the difference in the fracture moments of the two layers; a larger value indicates a higher risk of delamination or edge curling. These two indicators provide key intermediate variables for the subsequent calculation of the comprehensive adjustment index for coating cutting.

[0036] S300: Obtain the coating peel sensitivity based on the coating layer thickness and the coating peel strength, and calculate the coating cutting comprehensive adjustment index based on the coating surface slip, the interlayer asynchronous fracture difference and the coating peel sensitivity.

[0037] In this embodiment of the invention, a coating peel sensitivity is obtained based on the coating layer thickness and the coating peel strength. A comprehensive adjustment index for coating cutting is calculated based on the coating surface slippage, the interlayer asynchronous breakage difference, and the coating peel sensitivity. Deviations in coating peel strength from standard values ​​directly affect the risk of interlayer peeling. If slippage and the interlayer asynchronous breakage difference exceed reasonable ranges, the reliability of the data decreases, and direct use in calculations will lead to distorted adjustment criteria. Therefore, it is necessary to first obtain a coating peel sensitivity characterizing the risk of interlayer peeling based on the coating layer thickness and coating peel strength. Then, the data deviation is corrected using a parameter reliability factor. Finally, the coating surface slippage, the interlayer asynchronous breakage difference, and the coating peel sensitivity are weighted and integrated to calculate the comprehensive adjustment index for coating cutting, providing an accurate and reliable adjustment basis for subsequent iterative optimization of the cutting process.

[0038] Step S300 in the method provided in this embodiment of the invention includes: The step of obtaining the coating peel sensitivity based on the coating layer thickness and the coating peel strength includes: Obtain the standard peel strength of the lamination type used for the current batch of laminated covers, wherein the standard peel strength is the reference value of the peel strength between the lamination layer and the paper base layer under the standard bonding process for the lamination type; The deviation between the coating peel strength and the standard peel strength is calculated as the coating peel sensitivity.

[0039] First, obtain the standard peel strength of the lamination type used in the current batch of laminated covers. The standard peel strength is the baseline value for the peel strength between the lamination layer and the paper base layer under a standard bonding process for that lamination type. Standard peel strength refers to the baseline value for the peel strength between the lamination layer and the paper base layer for a particular lamination type used in the current batch of laminated covers under a standard bonding process. The standard peel strength value can be obtained from the technical specifications provided by the lamination material supplier.

[0040] Specifically, obtain the standard peel strength of the lamination type used for the current batch of laminated covers. Read the standard peel strength value from the product specifications provided by the lamination material supplier. If the specifications are not provided, take the average measured value of at least three samples of the same lamination type made using standard processes on paper of the same weight as the standard peel strength. For example, consulting the PP lamination material specifications yields a standard peel strength of 0.12 N / mm.

[0041] Next, the deviation between the actual peel strength and the standard peel strength is calculated as the peel sensitivity. Peel sensitivity refers to the degree of deviation between the measured peel strength and the standard peel strength. The deviation formula is: Deviation = |Actual Peel Strength - Standard Peel Strength| / Standard Peel Strength. A higher peel sensitivity indicates a higher risk of peeling between the laminate and the paper base layer, and a greater initial adjustment requirement. For example, if the actual peel strength of the current batch of PP laminated covers is 0.10 N / mm, the deviation = |0.10 - 0.12| / 0.12 ≈ 0.1667. Therefore, the peel sensitivity is 0.17.

[0042] Prior to calculating the comprehensive adjustment index for film-coated cutting, the following steps were also included: When the slippage of the coating surface exceeds the preset slippage upper limit, the ratio of the slippage upper limit to the slippage of the coating surface is obtained, and the resulting quotient is recorded as the first confidence component; When the interlayer asynchronous fracture difference exceeds the preset upper limit of asynchronous fracture difference, the ratio of the upper limit of asynchronous fracture difference to the interlayer asynchronous fracture difference is obtained, and the resulting quotient is recorded as the second confidence component. The smaller value between the first confidence component and the second confidence component is used as the parameter confidence factor. When the slip of the coating surface does not exceed the preset slip upper limit and the interlayer asynchronous fracture difference does not exceed the preset asynchronous fracture difference upper limit, the parameter confidence factor is set to 1.

[0043] First, when the slippage of the coating surface exceeds a preset upper limit, the ratio of the upper limit to the actual slippage of the coating surface is obtained, and the resulting quotient is recorded as the first confidence component. The preset upper limit refers to the maximum allowable value of the coating surface slippage set in advance. When the actual slippage exceeds the preset upper limit, the confidence of the measurement data is considered to have decreased. The preset upper limit value can be set according to equipment calibration or historical experience, for example, set to 2.0. The first confidence component is used to measure the proportion of loss in the confidence of the original adjustment index caused by the degree of exceeding the allowable upper limit of the coating surface slippage.

[0044] Specifically, it is determined whether the slippage of the coating surface exceeds a preset slippage upper limit. If it does, a first confidence component is calculated: First confidence component = Preset slippage upper limit / Coating surface slippage. If it does not exceed, this component is not calculated, and only the already calculated component is considered when taking the minimum value subsequently.

[0045] Secondly, when the interlaminar asynchronous fracture difference exceeds the preset upper limit of the asynchronous fracture difference, the ratio of the upper limit of the asynchronous fracture difference to the actual interlaminar asynchronous fracture difference is obtained, and the resulting quotient is recorded as the second confidence component. The preset upper limit of the asynchronous fracture difference refers to the maximum allowable value of the interlaminar asynchronous fracture difference set in advance, and is dimensionless. When the actual difference exceeds the preset upper limit of the asynchronous fracture difference, the confidence of the measurement data is considered to have decreased. The preset upper limit of the asynchronous fracture difference can be set according to equipment calibration or historical experience, for example, set to 1.0. The second confidence component is used to measure the proportion of loss in the confidence of the original adjustment index caused by the degree of exceeding the allowable upper limit of the interlaminar asynchronous fracture difference.

[0046] Specifically, it is determined whether the interlayer asynchronous fracture difference exceeds the preset upper limit of asynchronous fracture difference. If it does, the second confidence component is calculated: Second confidence component = Preset upper limit of asynchronous fracture difference / Interlayer asynchronous fracture difference. If it does not exceed, this component is not calculated, and only the calculated component is considered when taking the minimum value later; if neither component is calculated, the parameter confidence factor is set to 1.

[0047] Furthermore, the smaller value between the first confidence component and the second confidence component is used as the parameter confidence factor. When the surface slip of the coating does not exceed the preset slip upper limit and the interlayer asynchronous fracture difference does not exceed the preset asynchronous fracture difference upper limit, the parameter confidence factor is set to 1. The parameter confidence factor is the smaller value between the first confidence component and the second confidence component. If neither indicator exceeds its respective preset upper limit, the parameter confidence factor is set to 1.

[0048] Specifically, the smaller value between the first and second confidence components is taken as the parameter confidence factor. If neither component is calculated, meaning neither indicator exceeds the upper limit, the parameter confidence factor is set to 1. If only one component is calculated, such as only the slip exceeds the limit, the value of that component is directly used as the parameter confidence factor. The value range of the parameter confidence factor is limited to between 0 and 1. When the calculated component is greater than 1, it is treated as 1.

[0049] For example, the surface slip of the coating is known to be 3.6, and the interlayer asynchronous fracture difference is 0.4. A preset upper limit for slip is set to 2.0, and a preset upper limit for the asynchronous fracture difference is set to 1.0. The surface slip of the coating is determined: 3.6 > 2.0, exceeding the upper limit, so the first confidence component = 2.0 / 3.6 ≈ 0.556. The asynchronous fracture difference is determined: 0.4 < 1.0, not exceeding the upper limit, therefore the second confidence component does not exist. The smaller value is taken, so the parameter confidence factor = 0.556. This factor is less than 1, indicating that due to the severely excessive slip, the confidence of the subsequently calculated original comprehensive adjustment index needs to be reduced proportionally.

[0050] The process of obtaining the coating peel sensitivity based on the coating layer thickness and the coating peel strength, and calculating the coating cutting comprehensive adjustment index based on the coating surface slippage, the interlayer asynchronous fracture difference, and the coating peel sensitivity, includes: The original comprehensive adjustment index is obtained by weighting the surface slip of the coating, the difference in asynchronous interlayer fracture, and the coating peeling sensitivity. The original comprehensive adjustment index is corrected using the aforementioned parameter confidence factor to obtain the comprehensive adjustment index for film cutting.

[0051] First, the surface slippage of the coating, the difference in asynchronous interlayer breakage, and the coating peeling sensitivity are weighted and calculated to obtain the original comprehensive adjustment index. The original comprehensive adjustment index is the value obtained by weighting and summing the three indicators according to their respective weights. A larger original comprehensive adjustment index indicates a greater deviation between the current cutting process and the ideal state, requiring a greater degree of adjustment.

[0052] Specifically, when the slippage of the coated surface is greater, the cutting positioning deviation caused by the low friction of the coated layer surface is more severe, requiring increased paper pressing pressure to suppress slippage, and thus a greater initial adjustment requirement; when the difference in asynchronous breakage between the layers is greater, the degree of asynchrony between the breakage of the coated layer and the paper base layer is more severe, the risk of delamination or edge flipping is higher, requiring a reduction in cutting speed to synchronize the breakage sequence of the two layers, and thus a greater initial adjustment requirement; the coating peeling sensitivity is judged, and when the coating peeling sensitivity is greater, the risk of peeling between the coated layer and the paper base layer is higher, and thus a greater initial adjustment requirement.

[0053] First, the surface slip of the coating, the difference in asynchronous interlayer fracture, and the coating peeling sensitivity were normalized, and their values ​​were mapped to the interval [0,1]. Normalization was performed using a Min-Max method: for any index, the normalized value = (actual value of the index - theoretical minimum value of the index) / (theoretical maximum value of the index - theoretical minimum value of the index). When the actual index value exceeds the preset theoretical maximum value, the normalized value of the index is set to 1; when the actual index value is lower than the theoretical minimum value, it is set to 0.

[0054] Secondly, calculate the original comprehensive adjustment index: Original comprehensive adjustment index = Coating surface slippage × Slippage weight + Interlayer asynchronous fracture difference × Asynchronous difference weight + Coating peeling sensitivity × Peeling sensitivity weight. The specific values ​​of slippage weight, asynchronous difference weight, and peeling sensitivity weight are preset based on process experience.

[0055] For example, the weights for slippage are set to 0.5, asynchronous difference to 0.3, and peel sensitivity to 0.2. The sum of these three weights is 1. During normalization, the slippage of the coating surface is based on a preset upper limit of 2.0. The actual value of 3.6 exceeds the upper limit, so the normalized value is 1.0. The upper limit for the interlayer asynchronous fracture difference is 2, so the normalized value is 0.4 / 2 = 0.2. The coating peel sensitivity itself has a range of 0 to 1, and the actual value of 0.17 is used directly. Therefore, the original comprehensive adjustment index = 1.0 × 0.5 + 0.2 × 0.3 + 0.17 × 0.2 = 0.594.

[0056] Finally, the original comprehensive adjustment index is corrected using the parameter reliability factor to obtain the lamination and cutting comprehensive adjustment index. The lamination and cutting comprehensive adjustment index is the final index obtained after correcting the original comprehensive adjustment index using the parameter reliability factor. The lamination and cutting comprehensive adjustment index is used to guide subsequent iterative optimization; the larger the index, the greater the adjustment required in the cutting process. Lamination and cutting comprehensive adjustment index = original comprehensive adjustment index × parameter reliability factor. For example, if the original comprehensive adjustment index is 0.594 and the parameter reliability factor is 0.556, the lamination and cutting comprehensive adjustment index = 0.594 × 0.556 ≈ 0.33.

[0057] In this embodiment of the invention, the coating peel sensitivity is first calculated based on the coating layer thickness and coating peel strength, quantifying the deviation between the actual bonding process and the standard process. Then, based on whether the coating surface slippage and the difference in asynchronous interlayer breakage exceed a preset upper limit, a parameter reliability factor is calculated to correct the index reliability when measurement anomalies occur. Finally, the three indicators are weighted and summed to obtain the original comprehensive adjustment index, which is then multiplied by the reliability factor to obtain the final coating-cutting comprehensive adjustment index. This coating-cutting comprehensive adjustment index comprehensively reflects the overall urgency of adjusting the current cutting process, providing a clear quantitative basis for generating specific cutting process adjustment schemes. The larger the coating-cutting comprehensive adjustment index, the greater the required increase in paper pressing pressure, reduction in cutting speed, or adjustment in cutting angle.

[0058] S400: Iteratively optimize the cutting process according to the comprehensive adjustment index of the film-coating process to generate a cutting process adjustment scheme, wherein the cutting process adjustment scheme includes at least one of the following: adjustment amount of paper pressing pressure, adjustment amount of cutting speed, and adjustment amount of cutting angle.

[0059] Because the material properties of laminated covers vary between different batches, and the status of the cutting equipment may change, a single adjustment is often insufficient to achieve optimal results. Therefore, an iterative optimization approach is needed to gradually approach the optimal cutting parameters. Simultaneously, to improve efficiency and reduce the number of trial cuts, a historical cutting adjustment record library can be pre-established. When the material characteristics of the current batch match historical records, the validated process parameters are directly adopted. During the iterative optimization process, a preset standard iteration step size is used as a benchmark, combined with the current comprehensive adjustment index to calculate the appropriate iteration step size. The paper pressure, cutting speed, and cutting angle are adjusted accordingly, and the adjustment effect is verified through trial cuts until the comprehensive adjustment index converges below the preset threshold or reaches the maximum number of iterations.

[0060] Step S400 in the method provided in this embodiment of the invention includes: Prior to the step of iteratively optimizing the cutting process based on the comprehensive adjustment index of the film-coated cutting process to generate a cutting process adjustment scheme, the method further includes: Obtain a pre-established historical cutting and adjustment record library, wherein the historical cutting and adjustment record library contains multiple sets of historical adjustment records, each set of historical adjustment records includes historical coating surface slip, historical interlayer asynchronous breakage difference, historical coating peeling sensitivity, and verified effective historical adjustment paper pressure value, historical adjustment cutting speed value, and historical adjustment cutting angle value; Based on the comprehensive adjustment index for film cutting, iterative optimization is performed. Before that, the currently calculated film surface slip, the interlayer asynchronous fracture difference, and the film peeling sensitivity are similarly matched in the historical cutting adjustment record library to obtain the comprehensive similarity deviation. Obtain a preset historical similarity threshold, and select historical adjustment records with a comprehensive similarity deviation less than the historical similarity threshold and the smallest comprehensive similarity deviation as matching history records; When the matching history exists, the historical adjustment paper pressure value, historical adjustment cutting speed value, and historical adjustment cutting angle value in the matching history are directly used as the cutting process adjustment scheme. When no matching history exists, iterative optimization is performed based on the comprehensive adjustment index for film cutting.

[0061] First, a pre-established historical cutting adjustment record library is retrieved. This library contains multiple sets of historical adjustment records. Each set includes historical lamination surface slippage, historical interlayer asynchronous breakage difference, historical lamination peeling sensitivity, and verified historical adjustment paper pressure, historical adjustment cutting speed, and historical adjustment cutting angle values. The historical cutting adjustment record library is a database pre-stored in the cutting equipment control unit, containing multiple sets of historical adjustment records. Each set includes historical lamination surface slippage, historical interlayer asynchronous breakage difference, historical lamination peeling sensitivity, and verified historical adjustment paper pressure, historical adjustment cutting speed, and historical adjustment cutting angle values. The pre-established historical cutting adjustment record library is then read from the cutting equipment's storage unit.

[0062] For example, the historical cutting adjustment record library contains a set of records: historical lamination surface slip is 3.5, historical interlayer asynchronous breakage difference is 0.42, historical lamination peel sensitivity is 0.18, and the verified effective historical adjustment paper pressure is 110N, historical adjustment cutting speed is 180mm / s, and historical adjustment cutting angle is 85°.

[0063] Secondly, iterative optimization is performed based on the comprehensive adjustment index for film cutting. Before that, the currently calculated film surface slip, the interlayer asynchronous fracture difference, and the film peeling sensitivity are similarly matched in the historical cutting adjustment record library to obtain the comprehensive similarity deviation.

[0064] The step of performing a similarity match on the currently calculated coating surface slip, the interlayer asynchronous fracture difference, and the coating peeling sensitivity in the historical cutting adjustment record database to obtain a comprehensive similarity deviation includes: The slip deviation between the coating surface slipness and the historical coating surface slipness, the synchronization deviation between the interlayer asynchronous fracture difference and the historical interlayer asynchronous fracture difference, and the peeling deviation between the coating peeling sensitivity and the historical coating peeling sensitivity are calculated and obtained. The slip deviation, the synchronization deviation, and the peeling deviation are weighted and summed to obtain the comprehensive similarity deviation.

[0065] First, the slip deviation between the current coating surface slip and the historical coating surface slip, the synchronization deviation between the current interlayer asynchronous fracture difference and the historical interlayer asynchronous fracture difference, and the peel deviation between the current coating peel sensitivity and the historical coating peel sensitivity are calculated. The slip deviation is the absolute difference between the current coating surface slip and the corresponding value in the historical record, divided by the historical value. The synchronization deviation is the absolute difference between the current interlayer asynchronous fracture difference and the corresponding value in the historical record, divided by the historical value. The peel deviation is the absolute difference between the current coating peel sensitivity and the corresponding value in the historical record, divided by the historical value.

[0066] Specifically, the current coating surface slip, interlayer asynchronous fracture difference, and coating peel sensitivity are compared with each set of historical records in the database to calculate a comprehensive similarity deviation. For each set of historical records, three deviations are calculated: slip deviation = |current slip - historical slip| / max(current slip, historical slip); synchronization deviation = |current asynchronous difference - historical asynchronous difference| / max(current asynchronous difference, historical asynchronous difference); peel deviation = |current peel sensitivity - historical peel sensitivity| / max(current peel sensitivity, historical peel sensitivity).

[0067] For example, given that the current coating surface slip is 3.6, the interlayer asynchronous fracture difference is 0.4, and the coating peel sensitivity is 0.17, the slip deviation = |3.6-3.5| / 3.6≈0.0278; the synchronization deviation = |0.4-0.42| / 0.42≈0.0476; and the peel deviation = |0.17-0.18| / 0.18≈0.0556.

[0068] Next, the slip deviation, synchronization deviation, and peeling deviation are weighted and summed to obtain the comprehensive similarity deviation. The comprehensive similarity deviation is the value obtained by weighting and summing the slip deviation, synchronization deviation, and peeling deviation. The smaller the comprehensive similarity deviation, the higher the similarity between the current material properties and the historical records.

[0069] Specifically, the comprehensive similarity deviation = slip deviation × slip similarity weight + synchronization deviation × synchronization similarity weight + peeling deviation × peeling similarity weight. The slip similarity weight, synchronization similarity weight, and peeling similarity weight can be preset according to the importance of historical data, and the sum of the three weights is 1.

[0070] For example, if the sliding similarity weight is set to 0.4, the synchronization similarity weight to 0.4, and the stripping similarity weight to 0.2, then the overall similarity deviation = 0.0278×0.4 + 0.0476×0.4 + 0.0556×0.2 = 0.04128.

[0071] Next, a preset historical similarity threshold is obtained, and the historical adjustment record with the smallest overall similarity deviation that is less than the historical similarity threshold is selected as the matching historical record. The preset historical similarity threshold is used to determine whether the similarity between the characteristic parameters of the current coating material and the corresponding parameters in the historical record meets the standard that the historical process scheme can be directly adopted. The preset historical similarity threshold is set based on the statistical analysis of the material characteristic parameters of multiple batches of different coating covers, and the upper limit of the natural fluctuation range of each parameter is taken as the threshold value. For example, it is found that the overall deviation of slippage, asynchronous difference, and peel sensitivity of the same specification coating cover between different batches is usually less than 0.15, so the historical similarity threshold is set to 0.15. When the overall similarity deviation is less than the preset historical similarity threshold, the current material characteristics are considered to be highly matched with the historical record.

[0072] Furthermore, when the matching history exists, the historical adjustment values ​​of paper pressure, cutting speed, and cutting angle in the matching history are directly used as the cutting process adjustment scheme. The currently calculated coating surface slip, interlayer asynchronous breakage difference, and coating peeling sensitivity are compared with each group of historical adjustment records in the historical cutting adjustment record library to calculate the comprehensive similarity deviation. Records with a comprehensive similarity deviation less than a preset historical similarity threshold are selected from all historical records, and the record with the smallest comprehensive similarity deviation is chosen as the matching history.

[0073] For example, the preset historical similarity threshold is 0.15. The current parameters are: coating surface slip 3.6, interlayer asynchronous fracture difference 0.4, and coating peel sensitivity 0.17. Assume that the historical cutting and adjustment record library contains the following three sets of records: Record A: slip 3.5, asynchronous difference 0.42, peel sensitivity 0.18, overall similarity deviation 0.041; Record B: slip 3.8, asynchronous difference 0.45, peel sensitivity 0.20, overall similarity deviation 0.20; Record C: slip 3.2, asynchronous difference 0.38, peel sensitivity 0.15, overall similarity deviation 0.05. Among them, the comprehensive similarity deviation of record A and record C is less than 0.15, and the deviation of record A is 0.041, which is less than the deviation of record C is 0.05. Therefore, record A is selected as the matching history record, and the cutting process adjustment scheme is directly output: the paper pressing pressure is adjusted to 110N, the cutting speed is adjusted to 180mm / s, and the cutting angle is adjusted to 85°.

[0074] When no matching historical records exist, iterative optimization is performed based on the comprehensive adjustment index for film cutting. If no record has a comprehensive similarity deviation less than a threshold, it is determined that there are no matching historical records. For example, assuming that the comprehensive similarity deviation of all historical records is greater than or equal to 0.15, it is determined that there are no matching historical records, and the iterative optimization process is initiated.

[0075] The step of iteratively optimizing the cutting process based on the comprehensive adjustment index of the film-coated cutting process to generate a cutting process adjustment scheme includes: Obtain the preset standard iteration step size, and combine it with the comprehensive adjustment index of film cutting to obtain the appropriate iteration step size; Obtain the preset paper pressing pressure reference value, cutting speed reference value, and cutting angle reference value; The paper pressing pressure reference value, the cutting speed reference value, and the cutting angle reference value are adjusted respectively using the adaptive iteration step size to generate the paper pressing pressure value, the cutting speed value, and the cutting angle value. The laminated cover was test-cut using the adjusted paper pressure value, the adjusted cutting speed value, and the adjusted cutting angle value. The cutting status parameters were then re-acquired, and the updated laminated cutting comprehensive adjustment index was calculated. When the updated film-coating and cutting comprehensive adjustment index is less than or equal to the preset iterative convergence threshold, the adjusted paper pressing pressure value, the adjusted cutting speed value, and the adjusted cutting angle value are used as the cutting process adjustment scheme. When the updated film cutting comprehensive adjustment index is greater than the preset iteration convergence threshold, and the current iteration number has not reached the preset maximum iteration number, the update iteration step size is calculated based on the updated film cutting comprehensive adjustment index, and iterative optimization is performed until the iteration convergence condition is met or the preset maximum iteration number is reached.

[0076] First, obtain the preset standard iteration step size and, in conjunction with the comprehensive adjustment index for film coating and cutting, obtain the appropriate iteration step size. The preset standard iteration step size refers to the pre-set base magnitude of adjustment for a single iteration, and is dimensionless. The preset standard iteration step size can be set relatively large to accelerate convergence, for example, 0.5. The appropriate iteration step size refers to the actual adjustment magnitude used in the current iteration round, obtained by multiplying the preset standard iteration step size by the current comprehensive adjustment index for film coating and cutting. The preset standard iteration step size is read from the control unit of the cutting equipment. The appropriate iteration step size is calculated using the following formula: Appropriate iteration step size = Preset standard iteration step size × Comprehensive adjustment index for film coating and cutting. For example, if the preset standard iteration step size is set to 0.5, and the calculated value of the comprehensive adjustment index for film coating and cutting in the current batch is 0.33, then the appropriate iteration step size = 0.5 × 0.33 = 0.165.

[0077] Next, obtain the preset paper pressure reference value, cutting speed reference value, and cutting angle reference value. Read the preset initial process parameters from the control unit of the cutting equipment: paper pressure reference value, cutting speed reference value, and cutting angle reference value. These reference values ​​are usually the equipment's factory calibration values ​​or default values ​​for uncoated plain paper. For example, set the paper pressure reference value to 100N, the cutting speed reference value to 200mm / s, and the cutting angle reference value to 90°.

[0078] Next, the reference values ​​for paper pressing pressure, cutting speed, and cutting angle are adjusted using the aforementioned adaptation iteration step size to generate adjusted paper pressing pressure, cutting speed, and cutting angle values. The adjustment rules are as follows: Paper pressing pressure adjustment: The increase in paper pressing pressure is positively correlated with the adaptation iteration step size. That is, the larger the overall adjustment index for lamination cutting, the greater the increase in paper pressing pressure should be to suppress lamination slippage; Cutting speed adjustment: The decrease in cutting speed is positively correlated with the adaptation iteration step size. That is, the larger the index, the greater the decrease in cutting speed should be to delay the breakage of the paper base layer, making the breakage of the two layers more synchronized; Cutting angle adjustment: The decrease in cutting angle is positively correlated with the adaptation iteration step size. That is, the larger the index, the greater the decrease in cutting angle should be to reduce slippage caused by lateral forces.

[0079] The adjusted parameter values ​​are calculated using the following formulas: Adjusted paper pressure value = Paper pressure reference value × (1 + Adaptive iteration step size); Adjusted cutting speed value = Cutting speed reference value × (1 - Adaptive iteration step size); Adjusted cutting angle value = Cutting angle reference value × (1 - Adaptive iteration step size).

[0080] For example, if the adaptation iteration step size is 0.165, then: adjust the paper pressing pressure value = 100N × (1 + 0.165) = 116.5N, adjust the cutting speed value = 200mm / s × (1 - 0.165) = 167mm / s, and adjust the cutting angle value = 90° × (1 - 0.165) = 75.15°.

[0081] Then, the laminated cover is test-cut using the adjusted paper pressure, cutting speed, and cutting angle values, and the cutting status parameters are re-collected to calculate the updated comprehensive adjustment index for laminated cutting. The cutting equipment performs a test cut on the current batch of laminated covers using adjusted paper pressure, cutting speed, and cutting angle values. During the test cut, the cutting status parameters are re-collected according to steps S100-S300, and a new set of laminated surface slippage, interlayer asynchronous breakage difference, and laminated peel sensitivity is calculated, thereby calculating the updated comprehensive adjustment index for laminated cutting. For example, using the adjusted parameters for test cutting, new material lateral displacement, torque-displacement sequence, etc., are re-measured, and the updated comprehensive adjustment index for laminated cutting is calculated to be 0.18.

[0082] Subsequently, when the updated comprehensive adjustment index for laminated cutting is less than or equal to a preset iteration convergence threshold, the adjusted paper pressure value, the adjusted cutting speed value, and the adjusted cutting angle value are used as the cutting process adjustment scheme. The preset iteration convergence threshold refers to the maximum value of the pre-set comprehensive adjustment index for laminated cutting. When the updated index is less than or equal to this threshold, the cutting quality is considered to meet the requirements, and the iteration stops. For example, it can be set to 0.1.

[0083] Specifically, it determines whether the updated comprehensive adjustment index for lamination and cutting is less than or equal to the preset iteration convergence threshold. If the condition is met, the current adjusted paper pressure value, adjusted cutting speed value, and adjusted cutting angle value are output as the final cutting process adjustment scheme and recorded in the historical cutting adjustment record library for use in subsequent batches.

[0084] Furthermore, when the updated coating cutting comprehensive adjustment index is greater than the preset iterative convergence threshold, and the current iteration number has not reached the preset maximum iteration number, the update iteration step size is calculated based on the updated coating cutting comprehensive adjustment index, and iterative optimization is performed until the iterative convergence condition is met or the preset maximum iteration number is reached. The preset maximum iteration number refers to the maximum number of allowed iteration rounds, used to prevent infinite loops, for example, set to 5 times.

[0085] If the conditions are not met, check whether the current iteration count has reached the preset maximum iteration count. If not, update the coating and cutting comprehensive adjustment index as the new coating and cutting comprehensive adjustment index, recalculate the adaptation iteration step size, and repeat the above steps until the convergence condition is met or the maximum iteration count is reached. If convergence is still not achieved after reaching the maximum iteration count, take the adjustment parameters generated in the last iteration as the cutting process adjustment scheme and issue a prompt message.

[0086] For example, let the preset iteration convergence threshold be 0.1 and the preset maximum number of iterations be 5. After the first iteration, the overall adjustment index for lamination and cutting is 0.18, which is greater than 0.1, and the current iteration count is 1, which has not reached the maximum. Replace 0.33 with 0.18 to calculate the new adaptive iteration step size: 0.5 × 0.18 = 0.09. Then recalculate the adjustment parameters: paper pressure = 100 × (1 + 0.09) = 109 N, cutting speed = 200 × (1 - 0.09) = 182 mm / s, cutting angle = 90 × (1 - 0.09) = 81.9°. Perform another cutting attempt, obtaining a second update index of 0.09. At this point, 0.09 ≤ 0.1, satisfying the convergence condition, and the iteration stops. The final cutting process adjustment scheme is: paper pressure 109 N, cutting speed 182 mm / s, cutting angle 81.9°.

[0087] In this embodiment of the invention, a historical cutting adjustment record library is first used for similarity matching. When a historical record that highly matches the characteristics of the current laminating material exists, the verified optimal process parameters are directly called, reducing the number of trial cuts and improving production efficiency. If no matching record exists, an iterative optimization process is initiated: the product of the laminating cutting comprehensive adjustment index and the preset standard iteration step size is used as the adaptation iteration step size, and the paper pressing pressure, cutting speed, and cutting angle are adjusted in a directional manner. The adjustment effect is verified through trial cuts, and the process is iterated repeatedly until the comprehensive adjustment index converges to below the preset threshold. This method can automatically and quickly find the optimal combination of cutting parameters for the current batch of laminating covers, effectively suppressing laminating slippage and asynchronous interlayer breakage, and improving the consistency of cutting quality for notebook covers of different sizes.

[0088] Through the specific implementation methods described above, the embodiments of the present invention achieve the following technical effects: This invention provides a method and system for cutting notebook covers of various sizes. First, it accurately acquires key parameters such as lamination layer thickness, peel strength, cutter displacement, and material lateral displacement. Second, it identifies the breakage moment between the lamination layer and the paper base layer, calculates the surface slippage of the lamination layer and the difference in asynchronous interlayer breakage, quantifying the risks of slippage and delamination. Third, it introduces lamination peeling sensitivity and constructs a parameter reliability factor, obtaining a comprehensive adjustment index for lamination cutting through weighting and correction, objectively reflecting the urgency of process adjustments. Finally, it automatically generates adjustment schemes for paper pressing pressure, cutting speed, and cutting angle by combining historical similarity matching and iterative optimization. This invention effectively suppresses lamination slippage and asynchronous interlayer breakage, reduces defects such as burrs, peeling, and edge curling, and improves the consistency of cutting quality and production efficiency of notebook covers of different batches and sizes without requiring repeated manual trial cutting.

[0089] Example 2, as Figure 3 As shown, the present invention provides a cover cutting system for notebooks of various sizes, the system comprising: The cutting parameter acquisition module 11 is used to acquire the material characteristic parameters of the notebook cover to be cut and the cutting status parameters of the cutting device during the cutting process. The material characteristic parameters include the thickness of the cover and the peel strength of the cover, and the cutting status parameters include the tool displacement data and the lateral displacement of the material. The fracture slip calculation module 12 is used to identify the first tool displacement corresponding to the fracture time of the coating layer and the second tool displacement corresponding to the fracture time of the paper base layer based on the tool displacement data, and to calculate and obtain the slip degree of the coating surface and the interlayer asynchronous fracture difference based on the lateral displacement of the material. The adjustment index calculation module 13 is used to obtain the coating peel sensitivity based on the coating layer thickness and the coating peel strength, and to calculate the coating cutting comprehensive adjustment index based on the coating surface slip, the interlayer asynchronous fracture difference and the coating peel sensitivity. The process scheme generation module 14 is used to iteratively optimize the comprehensive adjustment index of film cutting and generate a cutting process adjustment scheme. The cutting process adjustment scheme includes at least one of the following: adjustment amount of paper pressing pressure, adjustment amount of cutting speed and adjustment amount of cutting angle.

[0090] In one embodiment, the trimming parameter acquisition module 11 is further configured to: Obtain the material characteristic parameters of the notebook cover to be cut, wherein the material characteristic parameters include the thickness of the cover layer and the peel strength of the cover; The cutting status parameters of the cutting equipment during the cutting process are obtained, wherein the cutting status parameters include tool displacement data and material lateral displacement, and the tool displacement data includes torque-displacement sequence.

[0091] In one embodiment, the fracture slip calculation module 12 is further configured to: Based on the tool displacement data, the torque change at adjacent sampling times is calculated. The tool displacement corresponding to the first torque surge is identified as the first tool displacement, and the tool displacement corresponding to the second torque surge is identified as the second tool displacement. The first torque surge corresponds to the instant of the film layer breaking, and the second torque surge corresponds to the instant of the paper base layer breaking. The amount of lateral material displacement of the laminated cover in the direction perpendicular to the preset cut line is obtained after the paper presser of the cutting device is pressed down and before the cutting blade contacts the laminated cover. Calculate the ratio of the lateral displacement of the material to the thickness of the coating layer to obtain the slip ratio of the coating surface; The difference between the second tool displacement and the first tool displacement is divided by the average of the first tool displacement and the second tool displacement to obtain the interlayer asynchronous fracture difference value.

[0092] In one embodiment, the adjustment index calculation module 13 is further configured to: The step of obtaining the coating peel sensitivity based on the coating layer thickness and the coating peel strength includes: Obtain the standard peel strength of the lamination type used for the current batch of laminated covers, wherein the standard peel strength is the reference value of the peel strength between the lamination layer and the paper base layer under the standard bonding process for the lamination type; The deviation between the coating peel strength and the standard peel strength is calculated as the coating peel sensitivity.

[0093] Prior to calculating the comprehensive adjustment index for film-coated cutting, the following steps were also included: When the slippage of the coating surface exceeds the preset slippage upper limit, the ratio of the slippage upper limit to the slippage of the coating surface is obtained, and the resulting quotient is recorded as the first confidence component; When the interlayer asynchronous fracture difference exceeds the preset upper limit of asynchronous fracture difference, the ratio of the upper limit of asynchronous fracture difference to the interlayer asynchronous fracture difference is obtained, and the resulting quotient is recorded as the second confidence component. The smaller value between the first confidence component and the second confidence component is used as the parameter confidence factor. When the slip of the coating surface does not exceed the preset slip upper limit and the interlayer asynchronous fracture difference does not exceed the preset asynchronous fracture difference upper limit, the parameter confidence factor is set to 1.

[0094] The process of obtaining the coating peel sensitivity based on the coating layer thickness and the coating peel strength, and calculating the coating cutting comprehensive adjustment index based on the coating surface slippage, the interlayer asynchronous fracture difference, and the coating peel sensitivity, includes: The original comprehensive adjustment index is obtained by weighting the surface slip of the coating, the difference in asynchronous interlayer fracture, and the coating peeling sensitivity. The original comprehensive adjustment index is corrected using the aforementioned parameter confidence factor to obtain the comprehensive adjustment index for film cutting.

[0095] In one embodiment, the process scheme generation module 14 is further configured to: Obtain the preset standard iteration step size, and combine it with the comprehensive adjustment index of film cutting to obtain the appropriate iteration step size; Obtain the preset paper pressing pressure reference value, cutting speed reference value, and cutting angle reference value; The paper pressing pressure reference value, the cutting speed reference value, and the cutting angle reference value are adjusted respectively using the adaptive iteration step size to generate the paper pressing pressure value, the cutting speed value, and the cutting angle value. The laminated cover was test-cut using the adjusted paper pressure value, the adjusted cutting speed value, and the adjusted cutting angle value. The cutting status parameters were then re-acquired, and the updated laminated cutting comprehensive adjustment index was calculated. When the updated film-coating and cutting comprehensive adjustment index is less than or equal to the preset iterative convergence threshold, the adjusted paper pressing pressure value, the adjusted cutting speed value, and the adjusted cutting angle value are used as the cutting process adjustment scheme. When the updated film cutting comprehensive adjustment index is greater than the preset iteration convergence threshold, and the current iteration number has not reached the preset maximum iteration number, the update iteration step size is calculated based on the updated film cutting comprehensive adjustment index, and iterative optimization is performed until the iteration convergence condition is met or the preset maximum iteration number is reached.

[0096] Prior to the step of iteratively optimizing the cutting process based on the comprehensive adjustment index of the film-coated cutting process to generate a cutting process adjustment scheme, the method further includes: Obtain a pre-established historical cutting and adjustment record library, wherein the historical cutting and adjustment record library contains multiple sets of historical adjustment records, each set of historical adjustment records includes historical coating surface slip, historical interlayer asynchronous breakage difference, historical coating peeling sensitivity, and verified effective historical adjustment paper pressure value, historical adjustment cutting speed value, and historical adjustment cutting angle value; Based on the comprehensive adjustment index for film cutting, iterative optimization is performed. Before that, the currently calculated film surface slip, the interlayer asynchronous fracture difference, and the film peeling sensitivity are similarly matched in the historical cutting adjustment record library to obtain the comprehensive similarity deviation. Obtain a preset historical similarity threshold, and select historical adjustment records with a comprehensive similarity deviation less than the historical similarity threshold and the smallest comprehensive similarity deviation as matching history records; When the matching history exists, the historical adjustment paper pressure value, historical adjustment cutting speed value, and historical adjustment cutting angle value in the matching history are directly used as the cutting process adjustment scheme. When no matching history exists, iterative optimization is performed based on the comprehensive adjustment index for film cutting.

[0097] The step of performing a similarity match on the currently calculated coating surface slip, the interlayer asynchronous fracture difference, and the coating peeling sensitivity in the historical cutting adjustment record database to obtain a comprehensive similarity deviation includes: The slip deviation between the coating surface slipness and the historical coating surface slipness, the synchronization deviation between the interlayer asynchronous fracture difference and the historical interlayer asynchronous fracture difference, and the peeling deviation between the coating peeling sensitivity and the historical coating peeling sensitivity are calculated and obtained. The slip deviation, the synchronization deviation, and the peeling deviation are weighted and summed to obtain the comprehensive similarity deviation.

[0098] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cover cutting method for multi-specification size notebooks, characterized in that, include: Obtain the material characteristic parameters of the notebook cover to be cut and the cutting status parameters of the cutting device during the cutting process. The material characteristic parameters include the thickness of the cover and the peel strength of the cover, and the cutting status parameters include the tool displacement data and the lateral displacement of the material. Based on the tool displacement data, the first tool displacement corresponding to the fracture time of the coating layer and the second tool displacement corresponding to the fracture time of the paper base layer are identified, and based on the lateral displacement of the material, the slip degree of the coating surface and the difference in asynchronous fracture between layers are calculated. The coating peel sensitivity is obtained based on the coating layer thickness and the coating peel strength, and the coating cutting comprehensive adjustment index is calculated based on the coating surface slip, the interlayer asynchronous fracture difference and the coating peel sensitivity. The cutting process adjustment scheme is generated by iterative optimization based on the comprehensive adjustment index of the film-coated cutting process. The cutting process adjustment scheme includes at least one of the following: adjustment amount of paper pressing pressure, adjustment amount of cutting speed, and adjustment amount of cutting angle.

2. The method of claim 1, wherein the cover cutting method for multi-specification size notebooks is characterized by, The process of obtaining the material characteristic parameters of the notebook cover to be cut and the cutting status parameters of the cutting device during the cutting process includes: Obtain the material characteristic parameters of the notebook cover to be cut, wherein the material characteristic parameters include the thickness of the cover layer and the peel strength of the cover; The cutting status parameters of the cutting equipment during the cutting process are obtained, wherein the cutting status parameters include tool displacement data and material lateral displacement, and the tool displacement data includes torque-displacement sequence.

3. The method of claim 1, wherein the cover cutting method for multi-specification size notebooks is characterized by, The step of identifying the first tool displacement corresponding to the fracture time of the coating layer and the second tool displacement corresponding to the fracture time of the paper base layer based on the tool displacement data, and calculating the surface slip of the coating and the difference in asynchronous fracture between layers based on the lateral displacement of the material, includes: Based on the tool displacement data, the torque change at adjacent sampling times is calculated. The tool displacement corresponding to the first torque surge is identified as the first tool displacement, and the tool displacement corresponding to the second torque surge is identified as the second tool displacement. The first torque surge corresponds to the instant of the film layer breaking, and the second torque surge corresponds to the instant of the paper base layer breaking. The amount of lateral material displacement of the laminated cover in the direction perpendicular to the preset cut line is obtained after the paper presser of the cutting device is pressed down and before the cutting blade contacts the laminated cover. Calculate the ratio of the lateral displacement of the material to the thickness of the coating layer to obtain the slip ratio of the coating surface; The difference between the second tool displacement and the first tool displacement is divided by the average of the first tool displacement and the second tool displacement to obtain the interlayer asynchronous fracture difference value.

4. The method of claim 1, wherein the cover cutting method for multi-specification size notebooks is characterized by, The method of obtaining coating peel sensitivity based on the coating layer thickness and the coating peel strength includes: Obtain the standard peel strength of the lamination type used for the current batch of laminated covers, wherein the standard peel strength is the reference value of the peel strength between the lamination layer and the paper base layer under the standard bonding process for the lamination type; The deviation between the coating peel strength and the standard peel strength is calculated as the coating peel sensitivity.

5. The cover cutting method for notebooks of multiple sizes according to claim 1, characterized in that, Prior to calculating the comprehensive adjustment index for film-coated cutting, the following steps were also included: When the slippage of the coating surface exceeds the preset slippage upper limit, the ratio of the slippage upper limit to the slippage of the coating surface is obtained, and the resulting quotient is recorded as the first confidence component; When the interlayer asynchronous fracture difference exceeds the preset upper limit of asynchronous fracture difference, the ratio of the upper limit of asynchronous fracture difference to the interlayer asynchronous fracture difference is obtained, and the resulting quotient is recorded as the second confidence component. The smaller value between the first confidence component and the second confidence component is used as the parameter confidence factor. When the slip of the coating surface does not exceed the preset slip upper limit and the interlayer asynchronous fracture difference does not exceed the preset asynchronous fracture difference upper limit, the parameter confidence factor is set to 1.

6. The cover cutting method for notebooks of multiple sizes according to claim 5, characterized in that, The method involves obtaining the coating peel sensitivity based on the coating layer thickness and the coating peel strength, and calculating the coating cutting comprehensive adjustment index based on the coating surface slip, the interlayer asynchronous fracture difference, and the coating peel sensitivity, including: The original comprehensive adjustment index is obtained by weighting the surface slip of the coating, the difference in asynchronous interlayer fracture, and the coating peeling sensitivity. The original comprehensive adjustment index is corrected using the aforementioned parameter confidence factor to obtain the comprehensive adjustment index for film cutting.

7. The cover cutting method for notebooks of multiple sizes according to claim 1, characterized in that, The step of iteratively optimizing the cutting process based on the comprehensive adjustment index of the film-coated cutting process to generate a cutting process adjustment scheme includes: Obtain the preset standard iteration step size, and combine it with the comprehensive adjustment index of film cutting to obtain the appropriate iteration step size; Obtain the preset paper pressing pressure reference value, cutting speed reference value, and cutting angle reference value; The paper pressing pressure reference value, the cutting speed reference value, and the cutting angle reference value are adjusted respectively using the adaptive iteration step size to generate the paper pressing pressure value, the cutting speed value, and the cutting angle value. The laminated cover was test-cut using the adjusted paper pressure value, the adjusted cutting speed value, and the adjusted cutting angle value. The cutting status parameters were then re-acquired, and the updated laminated cutting comprehensive adjustment index was calculated. When the updated film-coating and cutting comprehensive adjustment index is less than or equal to the preset iterative convergence threshold, the adjusted paper pressing pressure value, the adjusted cutting speed value, and the adjusted cutting angle value are used as the cutting process adjustment scheme. When the updated film cutting comprehensive adjustment index is greater than the preset iteration convergence threshold, and the current iteration number has not reached the preset maximum iteration number, the update iteration step size is calculated based on the updated film cutting comprehensive adjustment index, and iterative optimization is performed until the iteration convergence condition is met or the preset maximum iteration number is reached.

8. The cover cutting method for notebooks of multiple sizes according to claim 7, characterized in that, Before generating a cutting process adjustment scheme by iteratively optimizing based on the comprehensive adjustment index for film-coated cutting, the process also includes: Obtain a pre-established historical cutting and adjustment record library, wherein the historical cutting and adjustment record library contains multiple sets of historical adjustment records, each set of historical adjustment records includes historical coating surface slip, historical interlayer asynchronous breakage difference, historical coating peeling sensitivity, and verified effective historical adjustment paper pressure value, historical adjustment cutting speed value, and historical adjustment cutting angle value; Based on the comprehensive adjustment index for film cutting, iterative optimization is performed. Before that, the currently calculated film surface slip, the interlayer asynchronous fracture difference, and the film peeling sensitivity are similarly matched in the historical cutting adjustment record library to obtain the comprehensive similarity deviation. Obtain a preset historical similarity threshold, and select historical adjustment records with a comprehensive similarity deviation less than the historical similarity threshold and the smallest comprehensive similarity deviation as matching history records; When the matching history exists, the historical adjustment paper pressure value, historical adjustment cutting speed value, and historical adjustment cutting angle value in the matching history are directly used as the cutting process adjustment scheme. When no matching history exists, iterative optimization is performed based on the comprehensive adjustment index for film cutting.

9. The cover cutting method for notebooks of multiple sizes according to claim 8, characterized in that, The step of performing a similarity match on the currently calculated coating surface slip, the interlayer asynchronous fracture difference, and the coating peeling sensitivity in the historical cutting and adjustment record database to obtain a comprehensive similarity deviation includes: The slip deviation between the coating surface slipness and the historical coating surface slipness, the synchronization deviation between the interlayer asynchronous fracture difference and the historical interlayer asynchronous fracture difference, and the peeling deviation between the coating peeling sensitivity and the historical coating peeling sensitivity are calculated and obtained. The slip deviation, the synchronization deviation, and the peeling deviation are weighted and summed to obtain the comprehensive similarity deviation.

10. A cover cutting system for notebooks of various sizes, characterized in that, A method for cutting the cover of a notebook in multiple sizes as described in any one of claims 1-9 includes: The cutting parameter acquisition module is used to acquire the material characteristic parameters of the notebook cover to be cut and the cutting status parameters of the cutting device during the cutting process. The material characteristic parameters include the cover thickness and the cover peel strength, and the cutting status parameters include the tool displacement data and the material lateral displacement. The fracture slip calculation module is used to identify the first tool displacement corresponding to the fracture time of the coating layer and the second tool displacement corresponding to the fracture time of the paper base layer based on the tool displacement data, and to calculate and obtain the slip degree of the coating surface and the difference in asynchronous fracture between layers based on the lateral displacement of the material. The adjustment index calculation module is used to obtain the coating peel sensitivity based on the coating layer thickness and the coating peel strength, and to calculate the coating cutting comprehensive adjustment index based on the coating surface slip, the interlayer asynchronous fracture difference and the coating peel sensitivity. The process scheme generation module is used to iteratively optimize the comprehensive adjustment index of film cutting and generate a cutting process adjustment scheme. The cutting process adjustment scheme includes at least one of the following: adjustment amount of paper pressing pressure, adjustment amount of cutting speed, and adjustment amount of cutting angle.

Images