A method, device, equipment and medium for determining rolling force in metal thin strip rolling

Abstract

The present invention discloses a method, device, equipment and medium for determining rolling force in metal strip rolling, relating to the technical field of rolling, to solve the problem of low accuracy in calculating rolling force in existing metal strip rolling. The method includes: obtaining rolling parameters of the metal strip; determining the entrance deformation resistance, average deformation resistance and exit deformation resistance of the metal strip by using a deformation resistance fitting method based on the rolling parameters; calculating the entrance tension influence coefficient and the exit tension influence coefficient; determining the total rolling force in the rolling deformation zone by using the engineering method based on the rolling parameters, the entrance tension influence coefficient and the exit tension influence coefficient; calculating the rolling flattening radius of the roll; and determining the target total rolling force for metal strip rolling that meets the preset convergence condition based on the rolling flattening radius. The method for determining rolling force in metal strip rolling provided by the present invention is used to improve the accuracy of calculating rolling force in metal strip rolling.

Description

Technical Field

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

[0002] The thin strip rolling technology is an important method for processing metal materials. By continuously rolling, metal billets are pressed into thin and uniform strip products. This technology is widely used in industries such as electronics, automotive, construction, and packaging, and is highly favored for producing high-quality and dimensionally accurate products. The 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 the field of materials science and engineering.

[0003] During the thin strip rolling process, the magnitude of the rolling force has an important impact 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 overloading of the rolling equipment and increased energy consumption, and trigger roll gap fluctuations, affecting the surface quality; while too small rolling force may result in insufficient reduction, uneven product thickness, thus reducing the service performance of the finished product. Therefore, reasonably controlling the magnitude of the rolling force is crucial for ensuring roll gap stability, optimizing product thickness distribution, and improving process efficiency.

[0004] However, existing methods for predicting rolling force in the thin strip rolling process mostly rely on the experience of operators and experimental adjustments, and the prediction accuracy of rolling force is relatively low. Summary of the Invention

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

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a method for determining rolling force in the rolling of metal thin strips, including:

[0008] Obtaining rolling parameters of the metal thin strip; the rolling parameters at least include the post-tension stress after the inlet and the pre-tension stress before the outlet;

[0009] Based on the rolling parameters, using the deformation resistance fitting method to determine the inlet deformation resistance, average deformation resistance and outlet deformation resistance of the metal thin strip;

[0010] Calculating the inlet tension influence coefficient according to the inlet deformation resistance and the post-tension stress after the inlet, and calculating the outlet tension influence coefficient according to the outlet deformation resistance and the pre-tension stress before the outlet;

[0011] Based on the rolling parameters, the influence coefficient of the inlet tension, and the influence coefficient of the outlet tension, the total rolling force in the rolling deformation zone is determined by the engineering method;

[0012] Calculate the rolling flattening radius of the roll according to the rolling parameters and the total rolling force;

[0013] Based on the rolling flattening radius, determine the target total rolling force for the rolling of the metal thin strip that meets the preset convergence condition;

[0014] Based on the rolling parameters, the method of fitting the deformation resistance is used to determine the inlet deformation resistance, the average deformation resistance, and the outlet deformation resistance of the metal thin strip, including: when the target pass number for the rolling of the metal thin strip is 1, the yield strength in the rolling parameters is determined as the inlet deformation resistance of the metal thin strip;

[0015] When the target pass number is greater than 1, use the formula:

[0016] ;

[0017] Calculate the inlet deformation resistance of the metal thin strip;

[0018] Based on the rolling parameters and the average thickness, use the formula:

[0019] ;

[0020] Calculate the average deformation resistance of the metal thin strip;

[0021] Based on the rolling parameters, use the formula:

[0022] ;

[0023] Calculate the outlet deformation resistance of the metal thin strip;

[0024] Where, is the inlet deformation resistance, is the average deformation resistance, is the outlet deformation resistance, is the initial thickness of the metal thin strip, is the inlet thickness of the metal thin strip at the target pass number, is the fitting coefficient of the average thickness calculation model, is the average thickness, is the outlet thickness of the metal thin strip at the target pass number, , , , are the fitting coefficients of the deformation resistance model.

[0025] 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:

[0026] Based on the rolling parameters and the inlet deformation resistance, the formula is used:

[0027] ;

[0028] The entrance thickness of the plastic deformation zone is calculated;

[0029] Based on the rolling parameters and exit deformation resistance, the formula is adopted:

[0030] ;

[0031] The exit thickness of the plastic deformation zone is calculated;

[0032] Based on the rolling parameters, the inlet tension influence coefficient and the outlet tension influence coefficient, the formula is adopted:

[0033] ;

[0034] The total tensile stress in the rolling deformation zone is calculated;

[0035] 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:

[0036] ;

[0037] The first rolling force in the plastic deformation zone is calculated;

[0038] Based on the rolling parameters, average deformation resistance and total tensile stress, the formula is used:

[0039] ;

[0040] The second rolling force in the elastic deformation zone is calculated;

[0041] 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;

[0042] Determine the sum of the first rolling force and the second rolling force as the total rolling force in the rolling deformation zone.

[0043] Optionally, the average thickness is calculated using the formula:

[0044] ;

[0045] Calculated.

[0046] Optionally, calculating the inlet tension influence coefficient based on the inlet deformation resistance and the inlet back tension stress, and calculating the outlet tension influence coefficient based on the outlet deformation resistance and the outlet front tension stress includes:

[0047] Substitute the inlet deformation resistance and the inlet back tension stress into the formula:

[0048] ;

[0049] Calculate the inlet tension influence coefficient;

[0050] Substitute the outlet deformation resistance and the outlet front tension stress into the formula:

[0051] ;

[0052] Calculate the outlet tension influence coefficient.

[0053] Optionally, determining the rolling flattening radius of the roll based on the rolling parameters and the total rolling force includes:

[0054] Based on the rolling parameters, the outlet deformation resistance, and the total rolling force, use the formula:

[0055] ;

[0056] Calculate the rolling flattening radius of the roll;

[0057] Wherein, is the total rolling force, is the rolling flattening radius.

[0058] Optionally, determining the target total rolling force for rolling the metal strip that meets the preset convergence condition based on the rolling flattening radius includes:

[0059] Judge whether the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition: ;

[0060] If the relationship between the rolling flattening radius and the initial flattening radius satisfies the preset convergence condition, then determine the total rolling force as the target total rolling force;

[0061] If the relationship between the rolling flattening radius and the initial flattening radius does not satisfy the preset convergence condition, then use the rolling flattening radius as the new initial flattening radius, and determine a new total rolling force according to the new initial flattening radius until the relationship between the rolling flattening radius and the initial flattening radius satisfies the preset convergence condition.

[0062] Compared with the prior art, the technical effect of the rolling force determination method for metal thin strip rolling provided by the present invention is as follows: An exponential form of the deformation resistance model is used to calculate the average deformation resistance, the entrance deformation resistance, and the exit deformation resistance, which is more in line with the deformation characteristics of the metal thin strip during the rolling process. Moreover, in the calculation of the average deformation resistance, the deformation resistance is calculated according to the exit thickness at different positions. Because the tension differences at various positions in the deformation zone of the metal thin strip during rolling are very large, calculating only a single deformation resistance cannot accurately describe the deformation resistance in the deformation zone; Based on the rolling parameters, the calculated entrance tension influence coefficient, and the exit tension influence coefficient, the engineering method is used to determine the total rolling force in the rolling deformation zone; Calculate the rolling flattening radius of the roll according to the rolling parameters and the total rolling force; Based on the rolling flattening radius, determine the target total rolling force for metal thin strip rolling that satisfies the preset convergence condition. This application takes into account the influence of the tensile stress and the influence of the deformation resistance in the calculation of the rolling force. And when actually rolling the metal thin strip, a relatively large front and rear tension needs to be used for rolling, which leads to a large difference in the deformation resistance at various positions in the deformation zone. The existing rolling force calculation methods do not take this into account, resulting in a large error in the calculation results. However, this application calculates the entrance deformation resistance, the average deformation resistance, and the exit deformation resistance, which can more accurately describe the deformation resistance in the deformation zone during the rolling process, making the calculated rolling force more accurate. Since a relatively large front and rear tension needs to be used for rolling the metal thin strip to obtain a flat plate shape, this application takes into account the tensile stress when calculating the rolling force, and the calculated rolling force is more accurate.

[0063] In a second aspect, the present invention provides a rolling force determination device for metal thin strip rolling, including:

[0064] A rolling parameter acquisition module, configured to acquire the rolling parameters of the metal thin strip; the rolling parameters at least include the entrance post-tensile stress and the exit pre-tensile stress;

[0065] A deformation resistance fitting module, configured to determine the entrance deformation resistance, the average deformation resistance, and the exit deformation resistance of the metal thin strip by using a deformation resistance fitting method based on the rolling parameters;

[0066] An inlet tension influence coefficient and an outlet tension influence coefficient calculation module, configured to calculate the inlet tension influence coefficient according to the inlet deformation resistance and the inlet back tension stress, and calculate the outlet tension influence coefficient according to the outlet deformation resistance and the outlet front tension stress;

[0067] A total rolling force calculation module, configured to determine the total rolling force in 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;

[0068] A rolling flattening radius calculation module, configured to calculate the rolling flattening radius of the roll according to the rolling parameters and the total rolling force;

[0069] An iteration module, configured to determine the target total rolling force for the rolling of the metal thin strip that meets the preset convergence condition based on the rolling flattening radius;

[0070] The deformation resistance fitting module includes:

[0071] An inlet deformation resistance calculation unit, configured to determine the yield strength in the rolling parameters as the inlet deformation resistance of the metal thin strip when the target pass number of the metal thin strip rolling is 1;

[0072] When the target pass number is greater than 1, use the formula:

[0073] ;

[0074] Calculate the inlet deformation resistance of the metal thin strip;

[0075] An average deformation resistance calculation unit, configured to use the formula based on the rolling parameters and the average thickness:

[0076] ;

[0077] Calculate the average deformation resistance of the metal thin strip;

[0078] An outlet deformation resistance calculation unit, configured to use the formula based on the rolling parameters:

[0079] ;

[0080] Calculate the outlet deformation resistance of the metal thin strip;

[0081] Wherein, is the initial thickness of the metal thin strip, is the average thickness calculation model parameter, , , , are the fitting coefficients of the deformation resistance model.

[0082] Thirdly, the present invention provides a rolling force determination device for rolling a thin metal strip, comprising:

[0083] A communication unit / communication interface for obtaining rolling parameters of the thin metal strip; the rolling parameters at least include the post-tension stress at the inlet and the pre-tension stress at the outlet;

[0084] A processing unit / processor for determining the inlet deformation resistance, average deformation resistance, and outlet deformation resistance of the thin metal strip based on the rolling parameters by using a deformation resistance fitting method;

[0085] Calculating an inlet tension influence coefficient according to the inlet deformation resistance and the post-tension stress at the inlet, and calculating an outlet tension influence coefficient according to the outlet deformation resistance and the pre-tension stress at the outlet;

[0086] Determining 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;

[0087] Calculating the rolling flattening radius of the roll according to the rolling parameters and the total rolling force;

[0088] Determining the target total rolling force for rolling the thin metal strip that meets a preset convergence condition based on the rolling flattening radius;

[0089] Determining the inlet deformation resistance, average deformation resistance, and outlet deformation resistance of the thin metal strip based on the rolling parameters by using a deformation resistance fitting method includes: when the target pass number for rolling the thin metal strip is 1, determining the yield strength in the rolling parameters as the inlet deformation resistance of the thin metal strip;

[0090] When the target pass number is greater than 1, using the formula:

[0091] ;

[0092] Calculating to obtain the inlet deformation resistance of the thin metal strip;

[0093] Based on the rolling parameters and the average thickness, using the formula:

[0094] ;

[0095] Calculating to obtain the average deformation resistance of the thin metal strip;

[0096] Based on the rolling parameters, using the formula:

[0097] ;

[0098] Calculating to obtain the outlet deformation resistance of the thin metal strip;

[0099] Wherein, is the inlet deformation resistance, is the average deformation resistance, is the exit deformation resistance, is the initial thickness of the metal strip, is the entrance thickness of the metal strip at the target pass, is the fitting coefficient of the average thickness calculation model, is the average thickness, is the exit thickness of the metal strip at the target pass, , , , are the fitting coefficients of the deformation resistance model.

[0100] Fourthly, the present invention provides a computer-readable storage medium, in which instructions are stored, and when the instructions are run, the rolling force determination method for rolling the metal strip is realized.

[0101] Compared with the prior art, the beneficial effects of the device-related solution in the second aspect, the equipment-related solution in the third aspect, and the computer-readable storage medium-related solution in the fourth aspect provided by the present invention are the same as those of the rolling force determination method for rolling the metal strip in the above technical solution, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0102] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0103] Figure 1 is a flowchart of a rolling force determination method for rolling a metal strip provided by the present invention;

[0104] Figure 2 is a process flowchart of the metal strip rolling process provided by the present invention;

[0105] Figure 3 is an iterative flowchart of the rolling force for rolling the metal strip provided by the present invention;

[0106] Figure 4 is a schematic diagram of the deformation zone division of the metal strip rolling provided by the present invention;

[0107] Figure 5 is a schematic diagram of the deformation zone and roll structure of the metal strip rolling provided by the present invention;

[0108] Figure 6 is a comparison chart of the experimental values and calculated values of the rolling force for different passes provided by the present invention;

[0109] Figure 7Schematic structural diagram of the rolling force determination device for metal strip rolling provided by the present invention;

[0110] Figure 8 Schematic structural diagram of the rolling force determination equipment for metal strip rolling provided by the present invention.

[0111] Reference numerals:

[0112] 1 - Plastic deformation zone, 2 - Entrance elastic compression zone, 3 - Exit elastic recovery zone, 701 - Rolling parameter acquisition module, 702 - Deformation resistance fitting module, 703 - Entrance tension influence coefficient and exit tension influence coefficient calculation module, 704 - Total rolling force calculation module, 705 - Rolling flattening radius calculation module, 706 - Iteration module. Detailed implementation manners

[0113] In order to facilitate a clear description of the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish identical 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 do not limit their sequence. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and terms such as "first" and "second" do not necessarily limit being different.

[0114] It should be noted that in the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present invention should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner.

[0115] In the present invention, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item)" or its similar expression means any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b or c can represent: 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 and c can be single or multiple.

[0116] In actual production, there is a lack of an effective rolling force prediction method in the thin strip rolling process. Traditional rolling force setting mostly relies on the experience of operators and experimental adjustment, resulting in large errors.

[0117] To solve the above problems, based on the mechanical properties of materials and the force conditions during the rolling process, the present invention proposes a method, device, equipment, and medium for determining the rolling force in the rolling of metal thin strips. By comprehensively considering factors such as the deformation resistance of materials and the dimensional parameters in the deformation zone, the optimal rolling force setting value can be calculated quickly and accurately, effectively ensuring the product thickness and dimensional accuracy. 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 will be described in conjunction with the accompanying drawings.

[0118] Figure 1 The following is a flowchart of a method for determining the rolling force in the rolling of metal thin strips provided by the present invention. The method includes the following steps:

[0119] Step 101: Obtain the rolling parameters of the metal thin strip;

[0120] As Figure 2 shown, each time the metal thin strip passes through a rolling mill stand, one pass of rolling is completed. After multiple passes of rolling, the metal thin strip with the required thickness is obtained.

[0121] The rolling parameters include the post-tension stress at the entrance, the pre-tension stress at the exit, the stiffness of the rolling mill, the Young's modulus of the roll material, the Poisson's ratio, the initial flattened radius of the roll obtained according to the metal thin strip rolling process flow, the yield strength of stainless steel, the initial thickness of the metal thin strip, the entrance thickness of the metal thin strip at the target pass, the exit thickness of the metal thin strip at the target pass, the width, the post-tension stress at the entrance, the pre-tension stress at the exit; the initial flattened radius of the roll is equal to the initial radius R0 of the working roll.

[0122] Step 102: Based on the rolling parameters, use the deformation resistance fitting method to determine the entrance deformation resistance, average deformation resistance, and exit deformation resistance of the metal thin strip;

[0123] Specifically, using the deformation resistance fitting method to determine the entrance deformation resistance, average deformation resistance, and exit deformation resistance of the metal thin strip based on the rolling parameters includes:

[0124] Based on the entrance thickness and exit thickness of the metal thin strip at the target pass in the rolling parameters, use formula (1):

[0125] (1)

[0126] Calculate the average thickness of the metal thin strip;

[0127] Calculate the entrance deformation resistance of the thin metal strip based on the initial thickness, the entrance thickness of the thin metal strip at the target pass, and the yield strength in the rolling parameters; specifically, when the target pass of the thin metal strip rolling is 1, determine the yield strength in the rolling parameters as the entrance deformation resistance of the thin metal strip;

[0128] When the target pass is greater than 1, use formula (2):

[0129] (2)

[0130] Calculate the entrance deformation resistance of the thin metal strip.

[0131] Based on the initial thickness and the average thickness in the rolling parameters, use formula (3):

[0132] (3)

[0133] Calculate the average deformation resistance of the thin metal strip;

[0134] Based on the initial thickness and the exit thickness of the thin metal strip at the target pass, use formula (4):

[0135] (4)

[0136] Calculate the exit deformation resistance of the thin metal strip;

[0137] Among them, is the initial thickness of the thin metal strip, is the average thickness calculation model parameter, 、 、 、 are the fitting coefficients of the deformation resistance model, is the average thickness, is the entrance thickness of the thin metal strip at the target pass, is the exit thickness of the thin metal strip at the target pass, is the average deformation resistance, is the exit deformation resistance, is the entrance deformation resistance.

[0138] Step 103: Calculate the entrance tension influence coefficient according to the entrance deformation resistance and the entrance back tension stress, and calculate the exit tension influence coefficient according to the exit deformation resistance and the exit front tension stress;

[0139] As an optional method, the calculating the entrance tension influence coefficient according to the entrance deformation resistance and the entrance back tension stress, and calculating the exit tension influence coefficient according to the exit deformation resistance and the exit front tension stress includes:

[0140] Substitute the values of the entrance deformation resistance and the entrance back tension stress into Equation (5):

[0141] (5)

[0142] Calculate the entrance tension influence coefficient;

[0143] Substitute the values of the exit deformation resistance and the exit front tension stress into Equation (6):

[0144] (6)

[0145] Calculate the exit tension influence coefficient.

[0146] Wherein, is the entrance back tension stress, is the exit front tension stress, is the entrance tension influence coefficient, is the exit tension influence coefficient.

[0147] Step 104: Based on the rolling parameters, the entrance tension influence coefficient, and the exit tension influence coefficient, determine the total rolling force in the rolling deformation zone by using the engineering method;

[0148] As an alternative, based on the rolling parameters, the entrance tension influence coefficient, and the exit tension influence coefficient, determining the total rolling force in the rolling deformation zone by using the engineering method includes:

[0149] Based on the entrance thickness, the entrance back tension stress, and the entrance deformation resistance of the metal thin strip in the target pass in the rolling parameters, use Equation (7):

[0150] (7)

[0151] Calculate the entrance thickness of the plastic deformation zone;

[0152] Based on the exit thickness, the exit front tension stress, and the exit deformation resistance of the metal thin strip in the target pass in the rolling parameters, use Equation (8):

[0153] (8)

[0154] Calculate the exit thickness of the plastic deformation zone;

[0155] Based on the entrance back tension stress, the exit front tension stress, the entrance tension influence coefficient, and the exit tension influence coefficient in the rolling parameters, use Equation (9):

[0156] (9)

[0157] Calculate the total tension stress in the rolling deformation zone;

[0158] Based on the initial flattening radius in the rolling parameters, the inlet thickness of the metal strip in the target pass, the outlet thickness of the metal strip in the target pass, 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, formula (10) is adopted:

[0159] (10)

[0160] Calculate the first rolling force of the plastic deformation zone;

[0161] Based on the outlet thickness of the metal strip in the target pass, the width, the Poisson's ratio, the Young's modulus, the initial flattening radius, the average deformation resistance, and the total tensile stress in the rolling parameters, formula (11) is adopted:

[0162] (11)

[0163] Calculate the second rolling force of the elastic deformation zone;

[0164] Among them, is the inlet thickness of the plastic deformation zone, is the outlet 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 the Young's modulus, is the Poisson's ratio, is the width.

[0165] Based on formula (12), determine the total rolling force of the rolling deformation zone as the sum of the first rolling force and the second rolling force, as shown in formula (12):

[0166] (12);

[0167] Among them, is the total rolling force.

[0168] Step 105: Calculate the rolling flattening radius of the roll according to the rolling parameters and the total rolling force;

[0169] As an optional method, the determining the rolling flattening radius of the roll according to the rolling parameters and the total rolling force includes:

[0170] Based on the initial flattening radius, Young's modulus, Poisson's ratio, width, the inlet thickness of the metal strip in the target pass, the outlet thickness of the metal strip in the target pass, the pre-tensile stress before the outlet, the deformation resistance at the outlet, and the total rolling force among the rolling parameters, use the formula:

[0171] ;

[0172] Calculate the rolling flattening radius of the roll;

[0173] Wherein, is the rolling flattening radius.

[0174] Step 106: Based on the rolling flattening radius, determine the target total rolling force for the rolling of the metal strip that meets the preset convergence condition.

[0175] As an optional method, determining the target total rolling force for the rolling of the metal strip that meets the preset convergence condition based on the rolling flattening radius includes:

[0176] Judge whether the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition: ;

[0177] If the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition, then determine the total rolling force as the target total rolling force;

[0178] If the relationship between the rolling flattening radius and the initial flattening radius does not meet the preset convergence condition, then use the rolling flattening radius as the new initial flattening radius, and determine a new total rolling force according to the new initial flattening radius until the relationship between the rolling flattening radius and the initial flattening radius meets the preset convergence condition.

[0179] Figure 1In the above-mentioned 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 uses a deformation resistance model in exponential form to calculate the average deformation resistance, the inlet deformation resistance, and the outlet deformation resistance, which is more in line with the deformation characteristics of the metal strip during the rolling process. Moreover, the average thickness in the average deformation resistance model is calculated by a weighted method, and different weighting coefficients can be selected according to different metal materials, so the applicable range is wider. Because the tension differences at various parts of the deformation zone during the rolling of the metal strip are very large, calculating only 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 present application takes into account the influence of the tensile stress as well as the influence of the deformation resistance in the calculation of the rolling force. And when actually rolling the metal strip, a relatively large front and rear tension needs to be used for rolling, which leads to a large difference in the deformation resistance at various parts of the deformation zone. The existing rolling force calculation methods do not take this into account, resulting in a large error in the calculation results. However, the present application calculates the inlet deformation resistance, the average deformation resistance, and the outlet deformation resistance, which can more accurately describe the deformation resistance of the deformation zone during the rolling process, making the calculated rolling force more accurate. Since a relatively large front and rear tension needs to be used for rolling the metal strip to obtain a flat plate shape, the present application takes into account the tensile stress when calculating the rolling force, and the calculated rolling force is more accurate.

[0180] As Figure 3 shown, in the specific implementation process, first obtain the Young's modulus and Poisson's ratio of the rolling mill rolls, then obtain the rolling mill process parameters, and set the initial flattened radius of the working rolls , then calculate the rolling force in the elastic compression zone and the rolling force in the plastic deformation zone, and calculate the rolling flattened radius of the working rolls, and 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 , and continue to calculate the rolling force until the convergence condition is met.

[0181] Table 1 shows the rolling schedule for stainless steel rolling on a 650 rolling mill. Next, taking the first pass as an example, the method for determining the rolling force of the metal strip rolling of the present invention will be described:

[0182] Table 1 Stainless Steel Rolling Schedule

[0183]

[0184] Step S1: First, obtain its stiffness according to the 650 rolling mill used in the experiment ; secondly, obtain its Young's modulus according to the material of the rolling mill rolls , Poisson's ratio and the initial radius of the working rolls ; Finally, obtain the initial thickness of the stainless steel metal thin strip according to the rolling process regulations of the stainless steel metal thin strip , the inlet thickness of the stainless steel metal thin strip in the first pass , the outlet thickness of the stainless steel metal thin strip in the first pass , width , the inlet back tension , the outlet front tension .

[0185] Step S2: According to the initial radius of the working rolls of the 650 rolling mill, set the initial flattened radius of the rolls = = 0.22m;

[0186] Step S3: According to the yield strength , determine the inlet deformation resistance corresponding to the first pass ;

[0187] Substitute the values of the inlet thickness of the stainless steel metal thin strip in the first pass and the outlet thickness of the stainless steel metal thin strip in the first pass into formula (1), The general value range of is 0.5 - 0.72, take

[0188] ;

[0189] Substitute the deformation resistance model coefficients , , , the initial thickness and the value of the average thickness into formula (3), and obtain the value of the average deformation resistance as follows:

[0190] ;

[0191] Substitute the deformation resistance model coefficients , , , the initial thickness and the value of the outlet thickness of the stainless steel metal thin strip in the first pass into formula (4), and obtain the value of the outlet deformation resistance as follows:

[0192] ;

[0193] Step S4: As Figure 4 and Figure 5 shown, according to the deformation characteristics of the stainless steel metal thin strip during the rolling process, divide the entire rolling deformation zone 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 , calculate the rolling force in the elastic deformation zone and the rolling force in the plastic deformation zone 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.

[0194] Specifically, step S41: Substitute the values of the entrance deformation resistance and the entrance back tension stress into formula (5) to obtain the value of the entrance tension influence coefficient as follows:

[0195] ;

[0196] Substitute the values of the exit deformation resistance and the exit front tension stress into formula (6) to obtain the value of the exit tension influence coefficient as follows:

[0197] ;

[0198] Substitute the values of the entrance thickness, the entrance back tension stress, and the entrance deformation resistance of the first-pass stainless steel metal thin strip into formula (7) to obtain the value of the entrance thickness of the plastic deformation zone as follows:

[0199] ;

[0200] Substitute the values of the exit thickness, the exit front tension stress, and the exit deformation resistance of the first-pass stainless steel metal thin strip into formula (8) to obtain the entrance thickness of the plastic deformation zone as follows:

[0201] ;

[0202] Substitute the values of the entrance back tension stress, the exit front tension stress, the entrance tension influence coefficient, and the exit tension influence coefficient into formula (9) to obtain the value of the total tension stress in the rolling deformation zone as follows:

[0203] ;

[0204] Substitute the values of the initial flattening radius, the entrance thickness of the target-pass stainless steel metal thin strip, the exit thickness of the target-pass stainless steel metal thin strip, the width, the entrance thickness of the plastic deformation zone, the exit thickness of the plastic deformation zone, the average deformation resistance, and the total tension stress into formula (10) to obtain the first rolling force in the plastic deformation zone as follows:

[0205] ;

[0206] Step S42: Substitute the values of the exit thickness, the width, the Poisson's ratio, the Young's modulus, the initial flattening radius, the average deformation resistance, and the total tension stress of the target-pass stainless steel metal thin strip into formula (11) to obtain the second rolling force in the elastic deformation zone as follows:

[0207] ;

[0208] 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:

[0209] ;

[0210] Step S6: Considering that a relatively large front and rear tension is required for rolling the stainless steel thin strip, which is necessary to obtain a flat strip shape. In addition, the deformation resistance of the stainless steel thin strip during the rolling process is relatively large, which will cause the roll to be flattened at the contact arc, and the flattening phenomenon of the roll cannot be ignored. Therefore, on the basis of considering the influence of tension, combined with the parameters and calculation results obtained in the above steps, calculate the rolling flattening radius of the roll during the rolling process as follows:

[0211] ;

[0212] Step S7: When obtaining the rolling flattening radius calculated for the first time, according to the preset convergence condition for setting the flattening radius in the present invention: , it can be judged that the convergence condition is not satisfied, so assign the value of to , and loop from Step S2 to Step S7 until the convergence condition is met. After looping 4 times, the convergence condition is met, and thus the final total rolling force ;

[0213] Step S8: According to the total rolling force obtained in Step S7, the set roll gap during the rolling process of the stainless steel thin strip can be calculated, and the roll gap of the rolling mill is adjusted to . The specific calculation process of the roll gap is as follows:

[0214] ;

[0215] Similarly, the set values of the roll gaps for the stainless steel thin strip in the other passes of this embodiment can be calculated, as shown in Table 2. From the table, we can see that compared with the target exit thickness of the stainless steel thin strip set in Table 1, the error between the roll gap value calculated by the present invention and it is within 0.06%, indicating that the present invention has accuracy and reliability. In addition, during the actual rolling production process, due to the relatively complex on-site production environment, it is difficult to measure the roll gap in real time, and there will be situations where the measurement is inaccurate. 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 proved by judging the error between the actually measured rolling force and the calculated rolling force. As Figure 6As shown, the calculated errors of both are within 3.7%, which also indicates the reliability of the present invention and its better applicability in actual production for guiding the setting of the rolling process regulations of metal thin strips.

[0216] Table 2 Roll gap setting values and errors

[0217]

[0218] It should be noted that the values of the target exit thickness and errors in Table 2 are the results with two decimal places reserved, and the values in the roll gap are the results with four decimal places reserved.

[0219] The rolling force determination method for metal thin strip rolling provided by the present invention aims to optimize the rolling process, improve production efficiency and product quality. This method introduces more accurate mathematical models and algorithms, and through more accurate calculations, better optimizes rolling parameters, including rolling force, roll gap of the rolling mill, etc., thereby reducing energy consumption and material waste and improving production efficiency. In addition, this method has good programmability and has broad application prospects and economic value.

[0220] The embodiments of the present invention can divide functional modules according to the above method examples. For example, each functional module can be corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules 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 embodiments of the present invention is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0221] In the case of dividing each functional module corresponding to each function, Figure 7 The structural schematic diagram of the rolling force determination device for metal thin strip rolling provided by the present invention is shown. As Figure 7 shown, the device includes:

[0222] A rolling parameter acquisition module 701, configured to acquire the rolling parameters of the metal thin strip; the rolling parameters at least include the post-tensile stress after the entrance and the pre-tensile stress before the exit;

[0223] A deformation resistance fitting module 702, configured to determine the entrance deformation resistance, average deformation resistance and exit deformation resistance of the metal thin strip by using a deformation resistance fitting method based on the rolling parameters;

[0224] An entrance tension influence coefficient and exit tension influence coefficient calculation module 703, configured to calculate the entrance tension influence coefficient according to the entrance deformation resistance and the post-tensile stress after the entrance, and calculate the exit tension influence coefficient according to the exit deformation resistance and the pre-tensile stress before the exit;

[0225] The total rolling force calculation module 704 is used to determine the total rolling force in the rolling deformation zone by the engineering method based on the rolling parameters, the inlet tension influence coefficient, and the outlet tension influence coefficient;

[0226] The rolling flattening radius calculation module 705 is used to calculate the rolling flattening radius of the roll according to the rolling parameters and the total rolling force;

[0227] The iteration module 706 is used to determine the target total rolling force for the rolling of the metal strip that meets the preset convergence condition based on the rolling flattening radius.

[0228] Specifically, the deformation resistance fitting module 702 includes:

[0229] The inlet deformation resistance calculation unit is used to determine the yield strength in the rolling parameters as the inlet deformation resistance of the metal strip when the target pass of the metal strip rolling is 1;

[0230] When the target pass is greater than 1, the formula is used:

[0231] ;

[0232] The inlet deformation resistance of the metal strip is calculated;

[0233] The average deformation resistance calculation unit is used to calculate the average deformation resistance of the metal strip based on the rolling parameters and the average thickness by the formula:

[0234] ;

[0235] The average deformation resistance of the metal strip is calculated;

[0236] The outlet deformation resistance calculation unit is used to calculate the outlet deformation resistance of the metal strip based on the rolling parameters by the formula:

[0237] ;

[0238] The outlet deformation resistance of the metal strip is calculated;

[0239] Among them, is the initial thickness of the metal strip, is the average thickness calculation model parameter, , , , are the fitting coefficients of the deformation resistance model.

[0240] Optionally, the total rolling force calculation module 704 may include:

[0241] The inlet thickness calculation unit of the plastic deformation zone is used to calculate the inlet thickness of the plastic deformation zone based on the rolling parameters and the inlet deformation resistance by the formula:

[0242] ;

[0243] Calculate the entrance thickness of the plastic deformation zone;

[0244] An exit thickness calculation unit for the plastic deformation zone, which is used to calculate, based on the rolling parameters and the exit deformation resistance, using the formula:

[0245] ;

[0246] Calculate the exit thickness of the plastic deformation zone;

[0247] A total tensile stress calculation unit, which is used to calculate, based on the rolling parameters, the entrance tension influence coefficient, and the exit tension influence coefficient, using the formula:

[0248] ;

[0249] Calculate the total tensile stress in the rolling deformation zone;

[0250] A first rolling force calculation unit, which is used to calculate, 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:

[0251] ;

[0252] Calculate the first rolling force in the plastic deformation zone;

[0253] A second rolling force calculation unit, which is used to calculate, based on the rolling parameters, the average deformation resistance, and the total tensile stress, using the formula:

[0254] ;

[0255] Calculate the second rolling force in the elastic deformation zone;

[0256] Wherein, is the entrance thickness of the plastic deformation zone, is the post-entrance tensile stress, is the pre-exit tensile stress, is the exit thickness of the plastic deformation zone, is the entrance tension influence coefficient, is the exit 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 the Young's modulus, is the Poisson's ratio, is the width;

[0257] A total rolling force calculation unit for determining the sum of the first rolling force and the second rolling force as the total rolling force of the rolling deformation zone.

[0258] Optionally, the device further includes an average thickness calculation unit for, based on the rolling parameters, using the formula:

[0259] ;

[0260] to calculate the average thickness of the metal strip.

[0261] Optionally, the inlet tension influence coefficient and outlet tension influence coefficient calculation module 703 may include:

[0262] An inlet tension influence coefficient calculation unit for substituting the values of the inlet deformation resistance and the inlet post-tensile stress into the formula:

[0263] ;

[0264] to calculate the inlet tension influence coefficient;

[0265] An outlet tension influence coefficient calculation unit for substituting the values of the outlet deformation resistance and the outlet pre-tensile stress into the formula:

[0266] ;

[0267] to calculate the outlet tension influence coefficient.

[0268] Optionally, the rolling flattening radius calculation module 705 may specifically be used for:

[0269] Based on the rolling parameters, the outlet deformation resistance, and the total rolling force, using the formula:

[0270] ;

[0271] to calculate the rolling flattening radius of the roll;

[0272] wherein, is the total rolling force, is the rolling flattening radius.

[0273] Optionally, the iteration module 706 may specifically be used for:

[0274] judging whether the relationship between the rolling flattening radius and the initial flattening radius satisfies a preset convergence condition: ;

[0275] If the relationship between the rolling flattening radius and the initial flattening radius satisfies the preset convergence condition, then determine the total rolling force as the target total rolling force;

[0276] If the relationship between the rolling flattening radius and the initial flattening radius does not satisfy the preset convergence condition, then use the rolling flattening radius as the new initial flattening radius, and determine a new total rolling force based on the new initial flattening radius until the relationship between the rolling flattening radius and the initial flattening radius satisfies the preset convergence condition.

[0277] The above mainly introduces the solution provided by the embodiment of the present invention from the perspective of the interaction between each module. It can be understood that, in order to implement the above functions, it includes the corresponding hardware structure or software module for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed in this article, the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraint conditions of the technical solution. Professional technicians 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.

[0278] In the case of adopting the corresponding integrated unit, Figure 8 The structural schematic diagram of the rolling force determination device for metal thin strip rolling provided by the present invention is shown. As Figure 8 shown, the device includes:

[0279] A communication unit / communication interface, configured to obtain the rolling parameters of the metal thin strip; the rolling parameters at least include the post-tensile stress at the inlet and the pre-tensile stress at the outlet;

[0280] A processing unit / processor, configured to determine the inlet deformation resistance, average deformation resistance, and outlet deformation resistance of the metal thin strip by using the deformation resistance fitting method based on the rolling parameters;

[0281] Calculate the inlet tension influence coefficient according to the inlet deformation resistance and the post-tensile stress at the inlet, and calculate the outlet tension influence coefficient according to the outlet deformation resistance and the pre-tensile stress at the outlet;

[0282] Based on the rolling parameters, the inlet tension influence coefficient, and the outlet tension influence coefficient, determine the total rolling force of the rolling deformation zone by using the engineering method;

[0283] Calculate the rolling flattening radius of the roll according to the rolling parameters and the total rolling force;

[0284] Based on the rolling flattening radius, determine the target total rolling force for metal thin strip rolling that satisfies the preset convergence condition;

[0285] Based on the rolling parameters, determining the entry deformation resistance, average deformation resistance, and exit deformation resistance of the thin metal strip using the deformation resistance fitting method includes: when the target pass number of the thin metal strip rolling is 1, determining the yield strength in the rolling parameters as the entry deformation resistance of the thin metal strip;

[0286] When the target pass number is greater than 1, use the formula:

[0287] ;

[0288] Calculate the entry deformation resistance of the thin metal strip;

[0289] Based on the rolling parameters and the average thickness, use the formula:

[0290] ;

[0291] Calculate the average deformation resistance of the thin metal strip;

[0292] Based on the rolling parameters, use the formula:

[0293] ;

[0294] Calculate the exit deformation resistance of the thin metal strip;

[0295] Among them, is the entry deformation resistance, is the average deformation resistance, is the exit deformation resistance, is the initial thickness of the thin metal strip, is the entry thickness of the thin metal strip at the target pass number, is the fitting coefficient of the average thickness calculation model, is the average thickness, is the exit thickness of the thin metal strip at the target pass number, , , , are the fitting coefficients of the deformation resistance model.

[0296] As Figure 8 shown, the above processor can be a general 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 above communication interface can be one or more. The communication interface can use any device such as a transceiver for communicating with other devices or communication networks.

[0297] As Figure 8 shown, the above terminal device may further include a communication line. The communication line may include a path for transmitting information between the above components.

[0298] Optionally, as Figure 8 shown, the terminal device may further include a memory. The memory is used to store computer-executable instructions for implementing the solution of the present invention and is controlled by the processor for execution. The processor is used to execute the computer-executable instructions stored in the memory, thereby implementing the method provided in the embodiments of the present invention.

[0299] As Figure 8 shown, the memory may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device 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 compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or any other medium that can be used to carry or store 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.

[0300] Optionally, the computer-executable instructions in the embodiments of the present invention may also be referred to as application code, and the embodiments of the present invention do not make specific limitations thereto.

[0301] In a specific implementation, as an embodiment, as Figure 8 shown, the processor may include one or more CPUs, such as Figure 8 CPU0 and CPU1 in

[0302] In a specific implementation, as an embodiment, as Figure 8 shown, the terminal device may include multiple processors, such as Figure 8 the processors in

[0303] On the one hand, a computer-readable storage medium is provided, in which instructions are stored, and when the instructions are run, a rolling force determination method for rolling a thin metal strip is implemented.

[0304] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part 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 instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present invention are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a terminal, a user device, or other programmable devices. The computer program or instructions can 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 instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that the computer can access, or a data storage device such as a server or data center integrating one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc (DVD); or it can be a semiconductor medium, such as a solid state drive (SSD).

[0305] Although the present invention has been described in conjunction with various embodiments herein, however, in the process of implementing the claimed invention, those skilled in the art can understand and achieve other variations of the disclosed embodiments by viewing the drawings, the disclosure content, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit can implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0306] Although the present invention has been described in connection with specific features and their embodiments, it will be apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the invention. Accordingly, this specification and the drawings are merely exemplary illustrations of the invention as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations or equivalents within the scope of the invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

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, , as well as The unit is MPa, 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; 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: calculating the entrance thickness of the plastic deformation zone based on the rolling parameters and the entrance deformation resistance; Calculating the exit thickness of the plastic deformation zone based on the rolling parameters and the exit deformation resistance; 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.

2. 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.

3. The method for determining the rolling force of metal strip rolling according to claim 1, 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.

4. The method for determining the rolling force of metal strip rolling according to claim 1, 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.

5. The method for determining the rolling force of metal strip rolling according to claim 4, 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.

6. 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; The total rolling force calculation module includes: A plastic deformation zone entrance thickness calculation unit, used to calculate the entrance thickness of the plastic deformation zone based on the rolling parameters and the entrance deformation resistance; An outlet thickness calculation unit of the plastic deformation zone, used for calculating the outlet thickness of the plastic deformation zone based on the rolling parameters and the outlet deformation resistance; 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; a total rolling force calculation unit, used for determining the sum of the first rolling force and the second rolling force as the total rolling force of the rolling deformation zone; 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 inlet deformation resistance, is the average deformation resistance, is the outlet deformation resistance, , as well as The unit is MPa, 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.

7. 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, , as well as The unit is MPa, 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; 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: calculating the entrance thickness of the plastic deformation zone based on the rolling parameters and the entrance deformation resistance; Calculating the exit thickness of the plastic deformation zone based on the rolling parameters and the exit deformation resistance; 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.

8. 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 5 is implemented.

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