Rolling force determination method, device and equipment for rolling of thin metal strip and medium

Abstract

The invention discloses a method, a device and equipment for determining rolling force of thin metal strip rolling and a medium, relates to the technical field of rolling, and aims to solve the problem that the rolling force calculation accuracy of existing thin metal strip rolling is low. The method comprises the steps that rolling parameters of a metal thin strip are obtained; based on the rolling parameters, the inlet deformation resistance, the average deformation resistance and the outlet deformation resistance of the metal thin strip are determined through a deformation resistance fitting method; calculating an inlet tension influence coefficient and an outlet tension influence coefficient; based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the total rolling force of the rolling deformation area is determined through an engineering method; calculating the rolling flattening radius of the roller; and based on the rolling flattening radius, the target total rolling force, meeting the preset convergence condition, of metal thin strip rolling is determined. The method for determining the rolling force of the thin metal strip rolling is used for improving the accuracy of calculation of the rolling force of the thin metal strip rolling.

Description

Technical Field

[0001] The present invention relates to the field of rolling technology, and in particular to a method, device, equipment and medium for determining rolling force of metal thin strip rolling. Background Art

[0002] Strip rolling technology is an important method for processing metal materials. It presses metal billets into thin and uniform strip products through continuous rolling. This technology is widely used in industries such as electronics, automobiles, construction and packaging, and is favored for its ability to produce high-quality, dimensionally precise products. Research and optimization of thin strip rolling technology can not only improve production efficiency and reduce costs, but also help optimize product quality, extend equipment life, and promote the development of materials science and engineering.

[0003] In the thin strip rolling process, the rolling force has an important influence on product quality and production efficiency. The rolling force not only directly affects the opening and stability of the roll gap, but also further determines the thickness and dimensional accuracy of the product. Excessive rolling force may cause overload of the rolling equipment and increase energy consumption, and cause roll gap fluctuations, affecting surface quality; while too small rolling force may lead to insufficient reduction and uneven product thickness, thereby reducing the performance of the finished product. Therefore, reasonable control of the rolling force is crucial to ensure roll gap stability, optimize product thickness distribution, and improve process efficiency.

[0004] However, the existing rolling force prediction methods for thin strip rolling processes mostly rely on operator experience and experimental adjustments, and the rolling force prediction accuracy is low. Summary of the invention

[0005] The object of the present invention is to provide a method, device, equipment and medium for determining the rolling force of metal thin strip rolling, so as to improve the accuracy of the calculation of the rolling force of metal thin strip rolling.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: In a first aspect, the present invention provides a method for determining a rolling force for rolling a metal strip, comprising: Obtaining rolling parameters of the metal strip; the rolling parameters at least include inlet post-tension stress and outlet pre-tension stress; Based on the rolling parameters, a deformation resistance fitting method is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip; Calculate the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and calculate the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress; Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the total rolling force of the rolling deformation zone is determined by an engineering method; Calculating the rolling flattening radius of the roller according to the rolling parameters and the total rolling force; Based on the rolling flattening radius, determining a target total rolling force for rolling the metal strip that satisfies a preset convergence condition; Based on the rolling parameters, the deformation resistance fitting method is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip, including: when the target pass of the metal strip rolling is 1, the yield strength in the rolling parameters is determined as the inlet deformation resistance of the metal strip; When the target pass is greater than 1, the formula is used: ; The entrance deformation resistance of the metal strip is calculated; Based on the rolling parameters and the average thickness, the formula is used: ; The average deformation resistance of the metal strip is calculated; Based on the rolling parameters, the formula is adopted: ; The outlet deformation resistance of the metal strip is calculated; in, is the inlet deformation resistance, is the average deformation resistance, is the outlet deformation resistance, is the initial thickness of the metal strip, is the entrance thickness of the metal strip at the target pass, Calculate the model parameters for the average thickness, is the average thickness, is the exit thickness of the metal strip at the target pass, , , , is the fitting coefficient of the deformation resistance model.

[0007] Optionally, based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, determining the total rolling force of the rolling deformation zone by an engineering method includes: Based on the rolling parameters and the inlet deformation resistance, the formula is used: ; The entrance thickness of the plastic deformation zone is calculated; Based on the rolling parameters and exit deformation resistance, the formula is adopted: ; The exit thickness of the plastic deformation zone is calculated; Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the formula is adopted: ; The total tensile stress in the rolling deformation zone is calculated; Based on the rolling parameters, the entrance thickness of the plastic deformation zone, the exit thickness of the plastic deformation zone and the total tensile stress, the formula is used: ; The first rolling force in the plastic deformation zone is calculated; Based on the rolling parameters, average deformation resistance and total tensile stress, the formula is used: ; The second rolling force in the elastic deformation zone is calculated; in, is the entrance thickness of the plastic deformation zone, is the entrance post-tension stress, is the tensile stress before the outlet, is the exit thickness of the plastic deformation zone, is the inlet tension influence coefficient, is the outlet tension influence coefficient, is the total tensile stress, is the first rolling force, is the second rolling force, is the rolling force in the elastic compression zone, is the rolling force in the elastic recovery zone, is the initial flattening radius, is Young's modulus, is Poisson's ratio, is the width; The sum of the first rolling force and the second rolling force is determined as the total rolling force of the rolling deformation zone.

[0008] Optionally, the average thickness is calculated using the formula: ; Calculated.

[0009] Optionally, calculating the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and calculating the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress includes: Substituting the inlet deformation resistance and inlet post-tension stress into the formula: ; The inlet tension influence coefficient is calculated; Substitute the outlet deformation resistance and outlet pre-tension stress into the formula: ; The outlet tension influence coefficient is calculated.

[0010] Optionally, determining the rolling flattening radius of the roller according to the rolling parameters and the total rolling force includes: Based on the rolling parameters, the exit deformation resistance and the total rolling force, the formula is adopted: ; The rolling flattening radius of the roller is calculated; in, is the total rolling force, is the rolling flattening radius.

[0011] Optionally, based on the rolling flattening radius, determining a target total rolling force for rolling the metal strip that satisfies a preset convergence condition includes: Determine whether the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition: ; If the relationship between the rolling flattening radius and the initial flattening radius satisfies the preset convergence condition, the total rolling force is determined as the target total rolling force; If the relationship between the rolling flattening radius and the initial flattening radius does not meet the preset convergence condition, the rolling flattening radius is used as the new initial flattening radius, and the new total rolling force is determined based on the new initial flattening radius until the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition.

[0012] Compared with the prior art, the technical effects of the rolling force determination method for metal strip rolling provided by the present invention are as follows: an exponential deformation resistance model is used to calculate the average deformation resistance, inlet deformation resistance and outlet deformation resistance, which is more composite with the deformation characteristics of the metal strip during the rolling process, and the deformation resistance is calculated according to the outlet thickness at different positions in the average deformation resistance calculation. Because the tensions in the deformation zone of the metal strip vary greatly during the rolling process, only calculating a single deformation resistance cannot accurately describe the deformation resistance of the deformation zone; based on the rolling parameters, the calculated inlet tension influence coefficient and the outlet tension influence coefficient, the engineering method is used to determine the total rolling force of the rolling deformation zone; the rolling flattening radius of the roller is calculated based on the rolling parameters and the total rolling force; based on the rolling flattening radius, the target total rolling force of the metal strip rolling that meets the preset convergence conditions is determined. This application considers the influence of tensile stress and deformation resistance in the calculation of rolling force, and the actual rolling of metal strips requires the use of large front and rear tensions, which leads to large differences in deformation resistance in various parts of the deformation zone. The existing rolling force calculation method does not take this into account, resulting in large errors in the calculation results. The calculation of the inlet deformation resistance, average deformation resistance and outlet deformation resistance by this application can more accurately describe the deformation resistance of the deformation zone during the rolling process, making the calculated rolling force more accurate. Since large front and rear tensions are required for rolling of metal strips in order to obtain a flat plate shape, this application considers tensile stress when calculating the rolling force, and the calculated rolling force is more accurate.

[0013] In a second aspect, the present invention provides a rolling force determination device for metal strip rolling, comprising: A rolling parameter acquisition module, used to acquire rolling parameters of the metal strip; the rolling parameters at least include inlet post-tension stress and outlet pre-tension stress; A deformation resistance fitting module, used for determining the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip based on the rolling parameters by using a deformation resistance fitting method; An inlet tension influence coefficient and an outlet tension influence coefficient calculation module, used to calculate the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and to calculate the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress; A total rolling force calculation module, used to determine the total rolling force of the rolling deformation zone by an engineering method based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient; A rolling flattening radius calculation module, used to calculate the rolling flattening radius of the roller according to the rolling parameters and the total rolling force; An iteration module, for determining a target total rolling force for rolling the metal strip that satisfies a preset convergence condition based on the rolling flattening radius; The deformation resistance fitting module includes: An entrance deformation resistance calculation unit is used to determine the yield strength in the rolling parameters as the entrance deformation resistance of the metal strip when the target pass number of the metal strip rolling is 1; When the target pass is greater than 1, the formula is used: ; The entrance deformation resistance of the metal strip is calculated; The average deformation resistance calculation unit is used based on the rolling parameters and the average thickness, using the formula: ; The average deformation resistance of the metal strip is calculated; The exit deformation resistance calculation unit is used based on the rolling parameters, using the formula: ; The outlet deformation resistance of the metal strip is calculated; in, is the initial thickness of the metal strip, Calculate the model parameters for the average thickness, , , , is the fitting coefficient of the deformation resistance model.

[0014] In a third aspect, the present invention provides a rolling force determination device for metal strip rolling, comprising: A communication unit / communication interface, used to obtain rolling parameters of the metal strip; the rolling parameters at least include inlet post-tension stress and outlet pre-tension stress; A processing unit / processor, for determining the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip by using a deformation resistance fitting method based on the rolling parameters; Calculate the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and calculate the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress; Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the total rolling force of the rolling deformation zone is determined by an engineering method; Calculating the rolling flattening radius of the roller according to the rolling parameters and the total rolling force; Based on the rolling flattening radius, determining a target total rolling force for rolling the metal strip that satisfies a preset convergence condition; Based on the rolling parameters, the deformation resistance fitting method is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip, including: when the target pass of the metal strip rolling is 1, the yield strength in the rolling parameters is determined as the inlet deformation resistance of the metal strip; When the target pass is greater than 1, the formula is used: ; The entrance deformation resistance of the metal strip is calculated; Based on the rolling parameters and the average thickness, the formula is used: ; The average deformation resistance of the metal strip is calculated; Based on the rolling parameters, the formula is adopted: ; The outlet deformation resistance of the metal strip is calculated; in, is the inlet deformation resistance, is the average deformation resistance, is the outlet deformation resistance, is the initial thickness of the metal strip, is the entrance thickness of the metal strip at the target pass, Calculate the model parameters for the average thickness, is the average thickness, is the exit thickness of the metal strip at the target pass, , , , is the fitting coefficient of the deformation resistance model.

[0015] In a fourth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores instructions, and when the instructions are executed, the method for determining the rolling force of the metal strip rolling is implemented.

[0016] Compared with the prior art, the beneficial effects of the second aspect device type solution, the third aspect equipment type solution, and the fourth aspect computer-readable storage medium type solution provided by the present invention are the same as the beneficial effects of the rolling force determination method for metal strip rolling described in the above technical solutions, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 A flow chart of a method for determining rolling force for metal strip rolling provided by the present invention; Figure 2 A flow chart of the metal strip rolling process provided by the present invention; Figure 3A rolling force iteration flow chart for metal strip rolling provided by the present invention; Figure 4 A schematic diagram of the deformation zones of the metal strip during rolling provided by the present invention; Figure 5 A schematic diagram of the metal strip rolling deformation zone and roller structure provided by the present invention; Figure 6 A comparison chart of the experimental and calculated rolling force values ​​of different passes provided by the present invention; Figure 7 A schematic diagram of the structure of a rolling force determination device for metal strip rolling provided by the present invention; Figure 8 A schematic structural diagram of a rolling force determination device for metal strip rolling provided by the present invention.

[0018] Reference numerals: 1-plastic deformation zone, 2-inlet elastic compression zone, 3-outlet elastic recovery zone, 701-rolling parameter acquisition module, 702-deformation resistance fitting module, 703-inlet tension influence coefficient and outlet tension influence coefficient calculation module, 704-total rolling force calculation module, 705-rolling flattening radius calculation module, 706-iteration module. DETAILED DESCRIPTION

[0019] In order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, words such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and their order is not limited. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit them to be different.

[0020] It should be noted that, in the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0021] In the present invention, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, the combination of a and b, the combination of a and c, the combination of b and c, or the combination of a, b and c, where a, b, c can be single or multiple.

[0022] In actual production, there is a lack of effective rolling force prediction methods in the thin strip rolling process. Traditional rolling force setting mostly relies on operator experience and experimental adjustments, and the error is large.

[0023] In order to solve the above problems, the present invention proposes a method, device, equipment and medium for determining the rolling force of metal thin strip rolling based on the mechanical properties of the material and the stress conditions during the rolling process. Taking into account factors such as the material deformation resistance and the dimensional parameters in the deformation zone, the optimal rolling force setting value is calculated quickly and accurately, which can effectively ensure the thickness and dimensional accuracy of the product. This calculation method not only reduces the impact of manual adjustment on product quality, but also improves the stability and efficiency of production. The following is an explanation with reference to the accompanying drawings.

[0024] Figure 1 A flow chart of a method for determining rolling force of a metal strip rolling provided by the present invention, the method comprising the following steps: Step 101: Obtain rolling parameters of the metal strip; like Figure 2 As shown, the metal strip completes one rolling pass each time it passes through a stand, and after multiple rolling passes, a metal strip of required thickness is obtained.

[0025] The rolling parameters include the post-entry tensile stress, the pre-exit tensile stress, the stiffness of the rolling mill, the Young's modulus of the roll material, the Poisson's ratio, the initial flattening radius of the roll obtained according to the metal strip rolling process, the yield strength of stainless steel, the initial thickness of the metal strip, the entrance thickness of the target pass metal strip, the exit thickness of the target pass metal strip, the width, the post-entry tensile stress, the pre-exit tensile stress; the initial flattening radius of the roll Equal to the initial radius R0 of the working roll.

[0026] Step 102: Based on the rolling parameters, a deformation resistance fitting method is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip; Specifically, based on the rolling parameters, the deformation resistance fitting method is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip, including: Based on the target pass metal strip entrance thickness and target pass metal strip exit thickness in the rolling parameters, formula (1) is used: (1) The average thickness of the metal strip is calculated; The entrance deformation resistance of the metal strip is calculated according to the initial thickness in the rolling parameters, the entrance thickness of the metal strip at the target pass, and the yield strength; specifically, when the target pass of the metal strip rolling is 1, the yield strength in the rolling parameters is determined as the entrance deformation resistance of the metal strip; When the target pass is greater than 1, use formula (2): (2) The entrance deformation resistance of the metal strip is calculated.

[0027] Based on the initial thickness and average thickness in the rolling parameters, formula (3) is used: (3) The average deformation resistance of the metal strip is calculated; Based on the initial thickness in the rolling parameters and the exit thickness of the target pass metal strip, formula (4) is used: (4) The outlet deformation resistance of the metal strip is calculated; in, is the initial thickness of the metal strip, Calculate the model parameters for the average thickness, , , , is the fitting coefficient of the deformation resistance model, is the average thickness, is the entrance thickness of the metal strip at the target pass, is the exit thickness of the metal strip at the target pass, is the average deformation resistance, is the outlet deformation resistance, is the inlet deformation resistance.

[0028] Step 103: calculating an inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and calculating an outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress; As an optional manner, the calculating of the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and the calculating of the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress include: Substitute the values ​​of the inlet deformation resistance and the inlet post-tension stress into formula (5): (5) The inlet tension influence coefficient is calculated; Substitute the values ​​of the outlet deformation resistance and the outlet pre-tension stress into formula (6): (6) The outlet tension influence coefficient is calculated.

[0029] in, is the entrance post-tension stress, is the tensile stress before the outlet, is the inlet tension influence coefficient, is the outlet tension influence coefficient.

[0030] Step 104: Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the total rolling force of the rolling deformation zone is determined by an engineering method; As an optional method, based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the total rolling force of the rolling deformation zone is determined by an engineering method, including: Based on the target pass metal strip entrance thickness, entrance post-tension stress and entrance deformation resistance in the rolling parameters, formula (7) is used: (7) The entrance thickness of the plastic deformation zone is calculated; Based on the exit thickness of the target pass metal strip, the exit pre-tension stress and the exit deformation resistance in the rolling parameters, formula (8) is used: (8) The exit thickness of the plastic deformation zone is calculated; Based on the post-entry stress, pre-entry stress, entry tension influence coefficient and exit tension influence coefficient in the rolling parameters, formula (9) is used: (9) The total tensile stress in the rolling deformation zone is calculated; Based on the initial flattening radius, the target pass metal strip entrance thickness, the target pass metal strip exit thickness, width, the entrance thickness of the plastic deformation zone, the exit thickness of the plastic deformation zone, the average deformation resistance and the total tensile stress in the rolling parameters, formula (10) is used: (10) The first rolling force in the plastic deformation zone is calculated; Based on the exit thickness, width, Poisson's ratio, Young's modulus, initial flattening radius, average deformation resistance and total tensile stress of the target pass metal strip in the rolling parameters, formula (11) is used: (11) The second rolling force in the elastic deformation zone is calculated; in, is the entrance thickness of the plastic deformation zone, is the exit thickness of the plastic deformation zone, is the total tensile stress, is the first rolling force, is the second rolling force, is the rolling force in the elastic compression zone, is the rolling force in the elastic recovery zone, is the initial flattening radius, is Young's modulus, is Poisson's ratio, is the width.

[0031] Based on formula (12), the sum of the first rolling force and the second rolling force is determined as the total rolling force of the rolling deformation zone, as shown in formula (12): (12); in, is the total rolling force.

[0032] Step 105: calculating the rolling flattening radius of the roller according to the rolling parameters and the total rolling force; As an optional manner, the determining the rolling flattening radius of the roller according to the rolling parameters and the total rolling force includes: Based on the initial flattening radius, Young's modulus, Poisson's ratio, width, target pass metal strip inlet thickness, target pass metal strip outlet thickness, outlet pre-tensile stress, outlet deformation resistance and the total rolling force in the rolling parameters, the formula is used: ; The rolling flattening radius of the roller is calculated; in, is the rolling flattening radius.

[0033] Step 106: Based on the rolling flattening radius, determine a target total rolling force for rolling the metal strip that meets a preset convergence condition.

[0034] As an optional method, based on the rolling flattening radius, determining the target total rolling force for the metal strip rolling that meets the preset convergence condition includes: Determine whether the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition: ; If the relationship between the rolling flattening radius and the initial flattening radius satisfies the preset convergence condition, the total rolling force is determined as the target total rolling force; If the relationship between the rolling flattening radius and the initial flattening radius does not meet the preset convergence condition, the rolling flattening radius is used as the new initial flattening radius, and the new total rolling force is determined based on the new initial flattening radius until the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition.

[0035] Figure 1 In the above invention, since it is necessary to understand the deformation resistance of the metal during the rolling process through a tensile test before rolling the metal strip, the present invention adopts an exponential deformation resistance model to calculate the average deformation resistance, inlet deformation resistance and outlet deformation resistance, which better combines the deformation characteristics of the metal strip during the rolling process, and the average thickness in the average deformation resistance model is calculated in a weighted manner, and different weighting coefficients can be selected according to different metal materials, which has a wider range of applications. Because the tension in the deformation zone of the metal strip varies greatly during the rolling process, only calculating a single deformation resistance cannot accurately describe the deformation resistance of the deformation zone; based on the rolling parameters, the calculated inlet tension influence coefficient and the outlet tension influence coefficient, this application considers the influence of tensile stress and the influence of deformation resistance in the calculation of rolling force, and the actual metal strip rolling requires a larger front and rear tension for rolling, which leads to a large difference in deformation resistance in the deformation zone. The existing rolling force calculation method does not take this into account, resulting in a large error in the calculation result. The calculation of the inlet deformation resistance, average deformation resistance and outlet deformation resistance by this application can more accurately describe the deformation resistance of the deformation zone during the rolling process, making the calculated rolling force more accurate. Since a larger front and rear tension is required for rolling of metal strips in order to obtain a straight plate shape, this application considers tensile stress when calculating the rolling force, and the calculated rolling force is more accurate.

[0036] like Figure 3 As shown, in the specific implementation process, the Young's modulus and Poisson's ratio of the rolling mill roll are first obtained, and then the rolling mill process parameters are obtained to set the initial flattening radius of the working roll. , then calculate the rolling force in the elastic compression zone and the rolling force in the plastic deformation zone, and calculate the rolling flattening radius of the working roll to determine whether the convergence condition is met. If so, the sum of the rolling force in the elastic compression zone and the rolling force in the plastic deformation zone is the final total rolling force. If the convergence condition is not met, let , continue to calculate the rolling force until the convergence condition is met.

[0037] Table 1 is a 650 mill stainless steel rolling procedure. Next, the method for determining the rolling force of the metal strip rolling of the present invention is described by taking the first pass as an example: Table 1 Stainless steel rolling specifications

[0038] Step S1: First, obtain the stiffness of the 650 rolling mill used in the experiment ; Secondly, obtain the Young's modulus according to the material of the rolling mill roll , Poisson's ratio and the initial radius of the working roll ; Finally, the initial thickness of the stainless steel metal strip is obtained according to the stainless steel metal strip rolling process specification , the entrance thickness of the first pass stainless steel strip , the outlet thickness of the first pass stainless steel metal strip ,width , post-entrance tensile stress , tensile stress before outlet .

[0039] Step S2: Based on the initial radius of the working roll of the 650 rolling mill , set the initial flattening radius of the roller = =0.22m; Step S3: According to the yield strength , determine the entrance deformation resistance corresponding to the first pass ; Substitute the values ​​of the inlet thickness of the first pass stainless steel metal strip and the outlet thickness of the first pass stainless steel metal strip into formula (1): The general value range of is 0.5~0.72. , the average thickness is obtained as follows: ; Fit the deformation resistance model coefficient of stainless steel material , , Substituting the values ​​of initial thickness and average thickness into formula (3), the value of average deformation resistance is obtained as follows: ; Fit the deformation resistance model coefficient of stainless steel material , , Substituting the values ​​of the initial thickness and the outlet thickness of the first pass stainless steel metal strip into formula (4), the value of the outlet deformation resistance is obtained as follows: ; Step S4: Figure 4 and Figure 5 As shown in FIG. 1 , according to the deformation characteristics of the stainless steel metal strip during rolling, the entire rolling deformation zone is divided into an elastic deformation zone and a plastic deformation zone 1. The elastic deformation zone includes an inlet elastic compression zone 2 and an outlet elastic recovery zone 3. The length of the elastic compression zone is , the length of the elastic recovery zone is , the length of the plastic deformation zone is , the rolling force in the elastic deformation zone and the rolling force in the plastic deformation zone are calculated respectively, where the rolling force in the elastic deformation zone includes the rolling force in the elastic compression zone and the rolling force in the elastic recovery zone.

[0040] Specifically, step S41: Substitute the values ​​of the inlet deformation resistance and the inlet post-tension stress into formula (5) to obtain the value of the inlet tension influence coefficient as follows: ; Substituting the values ​​of outlet deformation resistance and outlet pre-tension stress into formula (6), the value of outlet tension influence coefficient is obtained as follows: ; Substituting the inlet thickness, inlet post-tension stress and inlet deformation resistance of the first pass stainless steel metal strip into formula (7), the inlet thickness of the plastic deformation zone is obtained as follows: ; Substituting the exit thickness, exit pre-tension stress and exit deformation resistance of the first pass stainless steel metal strip into formula (8), the entrance thickness of the plastic deformation zone is obtained as follows: ; Substituting the values ​​of the post-entry tensile stress, the pre-entry tensile stress, the inlet tension influence coefficient, and the outlet tension influence coefficient into formula (9), the value of the total tensile stress in the rolling deformation zone is obtained as follows: ; Substituting the initial flattening radius, the inlet thickness of the target pass stainless steel metal strip, the outlet thickness of the target pass stainless steel metal strip, the width, the inlet thickness of the plastic deformation zone, the outlet thickness of the plastic deformation zone, the average deformation resistance and the total tensile stress into formula (10), the first rolling force in the plastic deformation zone is obtained as follows: ; Step S42: Substitute the values ​​of the outlet thickness, width, Poisson's ratio, Young's modulus, initial flattening radius, average deformation resistance and total tensile stress of the target pass stainless steel metal strip into formula (11) to obtain the second rolling force in the elastic deformation zone as follows: ; Step S5: Substitute the values ​​of the first rolling force and the second rolling force into formula (12) to obtain the value of the total rolling force in the rolling deformation zone as follows: ; Step S6: Considering that the stainless steel metal strip needs to be rolled with a large front and rear tension, which is necessary to obtain a flat plate shape, in addition, the stainless steel metal strip has a large deformation resistance during the rolling process, which will cause the roller to flatten at the contact arc. The flattening phenomenon of the roller cannot be ignored. Therefore, based on the consideration of the influence of tension, combined with the parameters and calculation results obtained in the above steps, the rolling flattening radius of the roller during the rolling process is calculated as follows: ; Step S7: When the first calculated rolling flattening radius is obtained, the preset convergence condition of the flattening radius is set as follows in the present invention: , it can be judged that the convergence condition is not met, so The value of , loop step S2 to step S7 until the convergence condition is met. After looping 4 times, the convergence condition is met, so the final total rolling force can be obtained. ; Step S8: Based on the total rolling force obtained in step S7 , the set roll gap of stainless steel metal strip rolling process can be calculated , adjust the mill roll gap to The specific calculation process of the roll gap is: ; Similarly, the roll gap setting values ​​for the remaining passes of the stainless steel metal strip in this embodiment can be calculated, as shown in Table 2. From the table, we can see that compared with the target outlet thickness of the stainless steel metal strip set in Table 1, the roll gap value calculated by the present invention is within 0.06% of the target outlet thickness, indicating that the present invention has accuracy and reliability. In addition, in the actual rolling production process, due to the complex on-site production environment, it is difficult to measure the roll gap in real time, and inaccurate measurements may occur. Generally, the roll gap is adjusted by the rolling force fed back by the force sensor, so the accuracy of the present invention can be demonstrated by judging the error between the actual measured rolling force and the calculated rolling force. Figure 6 As shown, the calculated errors of the two are both within 3.7%, which also shows that the present invention is reliable and can be better used in actual production to guide the setting of metal strip rolling process regulations.

[0041] Table 2 Roll gap setting value and error

[0042] It should be noted that the values ​​in the target outlet thickness and error in Table 2 are the results with 2 decimal places retained, and the values ​​in the roll gap are the results with 4 decimal places retained.

[0043] The rolling force determination method for metal strip rolling provided by the present invention is intended to optimize the rolling process, improve production efficiency and product quality. The method introduces a more accurate mathematical model and algorithm, and through more accurate calculation, better optimizes rolling parameters, including rolling force, rolling mill roll gap, etc., thereby reducing energy consumption and material waste and improving production efficiency. In addition, the method has good programmability and has broad application prospects and economic value.

[0044] The embodiment of the present invention can divide the functional modules according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present invention is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0045] In the case of dividing each functional module into corresponding functional modules, Figure 7 FIG. 2 shows a schematic diagram of the structure of the rolling force determination device for metal strip rolling provided by the present invention. Figure 7 As shown, the device comprises: A rolling parameter acquisition module 701 is used to acquire rolling parameters of the metal strip; the rolling parameters at least include inlet post-tension stress and outlet pre-tension stress; A deformation resistance fitting module 702 is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip based on the rolling parameters by using a deformation resistance fitting method; An inlet tension influence coefficient and an outlet tension influence coefficient calculation module 703, used to calculate the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and to calculate the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress; A total rolling force calculation module 704 is used to determine the total rolling force of the rolling deformation zone by using an engineering method based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient; A rolling flattening radius calculation module 705, used to calculate the rolling flattening radius of the roller according to the rolling parameters and the total rolling force; The iteration module 706 is used to determine the target total rolling force of the metal strip rolling that meets the preset convergence condition based on the rolling flattening radius.

[0046] Specifically, the deformation resistance fitting module 702 includes: An entrance deformation resistance calculation unit is used to determine the yield strength in the rolling parameters as the entrance deformation resistance of the metal strip when the target pass number of the metal strip rolling is 1; When the target pass is greater than 1, the formula is used: ; The entrance deformation resistance of the metal strip is calculated; The average deformation resistance calculation unit is used based on the rolling parameters and the average thickness, using the formula: ; The average deformation resistance of the metal strip is calculated; The exit deformation resistance calculation unit is used based on the rolling parameters, using the formula: ; The outlet deformation resistance of the metal strip is calculated; in, is the initial thickness of the metal strip, Calculate the model parameters for the average thickness, , , , is the fitting coefficient of the deformation resistance model.

[0047] Optionally, the total rolling force calculation module 704 may include: The entrance thickness calculation unit of the plastic deformation zone is used based on the rolling parameters and the entrance deformation resistance, using the formula: ; The entrance thickness of the plastic deformation zone is calculated; The exit thickness calculation unit of the plastic deformation zone is used based on the rolling parameters and the exit deformation resistance, using the formula: ; The exit thickness of the plastic deformation zone is calculated; The total tensile stress calculation unit is used to calculate the total tensile stress based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient using the formula: ; The total tensile stress in the rolling deformation zone is calculated; The first rolling force calculation unit is used to calculate the rolling force based on the rolling parameters, the entrance thickness of the plastic deformation zone, the exit thickness of the plastic deformation zone and the total tensile stress, using the formula: ; The first rolling force in the plastic deformation zone is calculated; The second rolling force calculation unit is used to calculate the rolling force based on the rolling parameters, the average deformation resistance and the total tensile stress using the formula: ; The second rolling force in the elastic deformation zone is calculated; in, is the entrance thickness of the plastic deformation zone, is the entrance post-tension stress, is the tensile stress before the outlet, is the exit thickness of the plastic deformation zone, is the inlet tension influence coefficient, is the outlet tension influence coefficient, is the total tensile stress, is the first rolling force, is the second rolling force, is the rolling force in the elastic compression zone, is the rolling force in the elastic recovery zone, is the initial flattening radius, is Young's modulus, is Poisson's ratio, is the width; The total rolling force calculation unit is used to determine the sum of the first rolling force and the second rolling force as the total rolling force of the rolling deformation zone.

[0048] Optionally, the device further comprises an average thickness calculation unit, which is used to calculate the average thickness based on the rolling parameters using the formula: ; The average thickness of the metal strip is calculated.

[0049] Optionally, the inlet tension influence coefficient and outlet tension influence coefficient calculation module 703 may include: The inlet tension influence coefficient calculation unit is used to substitute the values ​​of the inlet deformation resistance and the inlet post-tension stress into the formula: ; The inlet tension influence coefficient is calculated; The outlet tension influence coefficient calculation unit is used to substitute the values ​​of the outlet deformation resistance and the outlet front tension stress into the formula: ; The outlet tension influence coefficient is calculated.

[0050] Optionally, the rolling flattening radius calculation module 705 may be specifically used for: Based on the rolling parameters, the exit deformation resistance and the total rolling force, the formula is adopted: ; The rolling flattening radius of the roller is calculated; in, is the total rolling force, is the rolling flattening radius.

[0051] Optionally, the iteration module 706 may be specifically configured to: Determine whether the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition: ; If the relationship between the rolling flattening radius and the initial flattening radius satisfies the preset convergence condition, the total rolling force is determined as the target total rolling force; If the relationship between the rolling flattening radius and the initial flattening radius does not meet the preset convergence condition, the rolling flattening radius is used as the new initial flattening radius, and the new total rolling force is determined based on the new initial flattening radius until the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition.

[0052] The above mainly introduces the solution provided by the embodiment of the present invention from the perspective of the interaction between various modules. It can be understood that in order to realize the above functions, it includes hardware structures or software modules corresponding to the execution of various functions. It should be easy for those skilled in the art to realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0053] In the case of using the corresponding integrated unit, Figure 8 The schematic diagram of the structure of the rolling force determination device for metal strip rolling provided by the present invention is shown. Figure 8 As shown, the device includes: A communication unit / communication interface, used to obtain rolling parameters of the metal strip; the rolling parameters at least include inlet post-tension stress and outlet pre-tension stress; A processing unit / processor, for determining the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip by using a deformation resistance fitting method based on the rolling parameters; Calculate the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and calculate the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress; Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the total rolling force of the rolling deformation zone is determined by an engineering method; Calculating the rolling flattening radius of the roller according to the rolling parameters and the total rolling force; Based on the rolling flattening radius, determining a target total rolling force for rolling the metal strip that satisfies a preset convergence condition; Based on the rolling parameters, the deformation resistance fitting method is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip, including: when the target pass of the metal strip rolling is 1, the yield strength in the rolling parameters is determined as the inlet deformation resistance of the metal strip; When the target pass is greater than 1, the formula is used: ; The entrance deformation resistance of the metal strip is calculated; Based on the rolling parameters and the average thickness, the formula is used: ; The average deformation resistance of the metal strip is calculated; Based on the rolling parameters, the formula is adopted: ; The outlet deformation resistance of the metal strip is calculated; in, is the inlet deformation resistance, is the average deformation resistance, is the outlet deformation resistance, is the initial thickness of the metal strip, is the entrance thickness of the metal strip at the target pass, Calculate the model parameters for the average thickness, is the average thickness, is the exit thickness of the metal strip at the target pass, , , , is the fitting coefficient of the deformation resistance model.

[0054] like Figure 8 As shown, the processor may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present invention. The communication interface may be one or more. The communication interface may use any transceiver or other device for communicating with other devices or communication networks.

[0055] like Figure 8As shown, the terminal device may further include a communication line. The communication line may include a path to transmit information between the components.

[0056] Optional, such as Figure 8 As shown, the terminal device may further include a memory. The memory is used to store computer-executable instructions for executing the solution of the present invention, and the execution is controlled by the processor. The processor is used to execute the computer-executable instructions stored in the memory, thereby implementing the method provided by the embodiment of the present invention.

[0057] like Figure 8 As shown, the memory may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory may exist independently and be connected to the processor through a communication line. The memory may also be integrated with the processor.

[0058] Optionally, the computer-executable instructions in the embodiment of the present invention may also be referred to as application program codes, which is not specifically limited in the embodiment of the present invention.

[0059] In a specific implementation, as an example, Figure 8 As shown, the processor may include one or more CPUs, such as Figure 8 CPU0 and CPU1 in.

[0060] In a specific implementation, as an example, Figure 8 As shown, the terminal device may include multiple processors, such as Figure 8 Each of these processors can be a single-core processor or a multi-core processor.

[0061] On the one hand, a computer-readable storage medium is provided, in which instructions are stored. When the instructions are executed, a method for determining rolling force of metal strip rolling is implemented.

[0062] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present invention is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a terminal, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instruction may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a tape; it may also be an optical medium, such as a digital video disc (DVD); it may also be a semiconductor medium, such as a solid state drive (SSD).

[0063] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0064] Although the present invention has been described in conjunction with specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present invention. Accordingly, this specification and the accompanying drawings are merely exemplary illustrations of the present invention as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present invention. Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, the present invention is intended to include such modifications and variations if they fall within the scope of the claims of the present invention and their equivalents.

Claims

1. A method for determining rolling force for metal strip rolling, characterized in that: include: Obtaining rolling parameters of the metal strip; the rolling parameters at least include inlet post-tension stress and outlet pre-tension stress; Based on the rolling parameters, a deformation resistance fitting method is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip; Calculate the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and calculate the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress; Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the total rolling force of the rolling deformation zone is determined by an engineering method; Calculating the rolling flattening radius of the roller according to the rolling parameters and the total rolling force; Based on the rolling flattening radius, determining a target total rolling force for rolling the metal strip that satisfies a preset convergence condition; Based on the rolling parameters, the deformation resistance fitting method is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip, including: when the target pass of the metal strip rolling is 1, the yield strength in the rolling parameters is determined as the inlet deformation resistance of the metal strip; When the target pass is greater than 1, the formula is used: ； The entrance deformation resistance of the metal strip is calculated; Based on the rolling parameters and the average thickness, the formula is used: ； The average deformation resistance of the metal strip is calculated; Based on the rolling parameters, the formula is adopted: ； The outlet deformation resistance of the metal strip is calculated; in, is the inlet deformation resistance, is the average deformation resistance, is the outlet deformation resistance, is the initial thickness of the metal strip, is the entrance thickness of the metal strip at the target pass, Calculate the model parameters for the average thickness, is the average thickness, is the exit thickness of the metal strip at the target pass, , , , is the fitting coefficient of the deformation resistance model.

2. The method for determining the rolling force of metal strip rolling according to claim 1, characterized in that: Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the total rolling force in the rolling deformation zone is determined by the engineering method, including: Based on the rolling parameters and the inlet deformation resistance, the formula is used: ； The entrance thickness of the plastic deformation zone is calculated; Based on the rolling parameters and exit deformation resistance, the formula is adopted: ； The exit thickness of the plastic deformation zone is calculated; Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the formula is adopted: ； The total tensile stress in the rolling deformation zone is calculated; Based on the rolling parameters, the entrance thickness of the plastic deformation zone, the exit thickness of the plastic deformation zone and the total tensile stress, the formula is used: ； The first rolling force in the plastic deformation zone is calculated; Based on the rolling parameters, average deformation resistance and total tensile stress, the formula is used: ； The second rolling force in the elastic deformation zone is calculated; in, is the entrance thickness of the plastic deformation zone, is the entrance post-tension stress, is the tensile stress before the outlet, is the exit thickness of the plastic deformation zone, is the inlet tension influence coefficient, is the outlet tension influence coefficient, is the total tensile stress, is the first rolling force, is the second rolling force, is the rolling force in the elastic compression zone, is the rolling force in the elastic recovery zone, is the initial flattening radius, is Young's modulus, is Poisson's ratio, is the width; The sum of the first rolling force and the second rolling force is determined as the total rolling force of the rolling deformation zone.

3. The method for determining the rolling force of metal strip rolling according to claim 1, characterized in that: The average thickness is calculated using the formula: ； Calculated.

4. The method for determining the rolling force of metal strip rolling according to claim 2, characterized in that: Calculating the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and calculating the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress include: Substituting the values ​​of the inlet deformation resistance and the inlet post-tension stress into the formula: ； The inlet tension influence coefficient is calculated; Substitute the values ​​of the outlet deformation resistance and the outlet pre-tension stress into the formula: ； The outlet tension influence coefficient is calculated.

5. The method for determining the rolling force of metal strip rolling according to claim 2, characterized in that: Determining the rolling flattening radius of the roller according to the rolling parameters and the total rolling force includes: Based on the rolling parameters, the exit deformation resistance and the total rolling force, the formula is adopted: ； The rolling flattening radius of the roller is calculated; in, is the total rolling force, is the rolling flattening radius.

6. The method for determining the rolling force of metal strip rolling according to claim 5, characterized in that: Based on the rolling flattening radius, determining a target total rolling force for rolling a metal strip that satisfies a preset convergence condition includes: Determine whether the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition: ; If the relationship between the rolling flattening radius and the initial flattening radius satisfies the preset convergence condition, the total rolling force is determined as the target total rolling force; If the relationship between the rolling flattening radius and the initial flattening radius does not meet the preset convergence condition, the rolling flattening radius is used as the new initial flattening radius, and the new total rolling force is determined based on the new initial flattening radius until the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition.

7. A rolling force determination device for metal strip rolling, characterized in that: include: A rolling parameter acquisition module, used to acquire rolling parameters of the metal strip; the rolling parameters at least include inlet post-tension stress and outlet pre-tension stress; A deformation resistance fitting module, used for determining the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip based on the rolling parameters by using a deformation resistance fitting method; An inlet tension influence coefficient and an outlet tension influence coefficient calculation module, used to calculate the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and to calculate the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress; A total rolling force calculation module, used to determine the total rolling force of the rolling deformation zone by an engineering method based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient; A rolling flattening radius calculation module, used to calculate the rolling flattening radius of the roller according to the rolling parameters and the total rolling force; An iteration module, for determining a target total rolling force for rolling the metal strip that satisfies a preset convergence condition based on the rolling flattening radius; The deformation resistance fitting module includes: An entrance deformation resistance calculation unit is used to determine the yield strength in the rolling parameters as the entrance deformation resistance of the metal strip when the target pass number of the metal strip rolling is 1; When the target pass is greater than 1, the formula is used: ； The entrance deformation resistance of the metal strip is calculated; The average deformation resistance calculation unit is used based on the rolling parameters and the average thickness, using the formula: ； The average deformation resistance of the metal strip is calculated; The exit deformation resistance calculation unit is used based on the rolling parameters, using the formula: ； The outlet deformation resistance of the metal strip is calculated; in, is the initial thickness of the metal strip, Calculate the model parameters for the average thickness, , , , is the fitting coefficient of the deformation resistance model.

8. A rolling force determination device for metal strip rolling, characterized in that: include: A communication unit / communication interface, used to obtain rolling parameters of the metal strip; the rolling parameters at least include inlet post-tension stress and outlet pre-tension stress; A processing unit / processor, for determining the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip by using a deformation resistance fitting method based on the rolling parameters; Calculate the inlet tension influence coefficient according to the inlet deformation resistance and the inlet post-tension stress, and calculate the outlet tension influence coefficient according to the outlet deformation resistance and the outlet pre-tension stress; Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the total rolling force of the rolling deformation zone is determined by an engineering method; Calculating the rolling flattening radius of the roller according to the rolling parameters and the total rolling force; Based on the rolling flattening radius, determining a target total rolling force for rolling the metal strip that satisfies a preset convergence condition; Based on the rolling parameters, the deformation resistance fitting method is used to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal strip, including: when the target pass of the metal strip rolling is 1, the yield strength in the rolling parameters is determined as the inlet deformation resistance of the metal strip; When the target pass is greater than 1, the formula is used: ； The entrance deformation resistance of the metal strip is calculated; Based on the rolling parameters and the average thickness, the formula is used: ； The average deformation resistance of the metal strip is calculated; Based on the rolling parameters, the formula is adopted: ； The outlet deformation resistance of the metal strip is calculated; in, is the inlet deformation resistance, is the average deformation resistance, is the outlet deformation resistance, is the initial thickness of the metal strip, is the entrance thickness of the metal strip at the target pass, Calculate the model parameters for the average thickness, is the average thickness, is the exit thickness of the metal strip at the target pass, , , , is the fitting coefficient of the deformation resistance model.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed, the method for determining the rolling force of metal strip rolling according to any one of claims 1 to 6 is implemented.

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