Rolling mill control method and device, storage medium, and electronic equipment

Abstract

The present application discloses a rolling mill control method and device, storage medium, and electronic device. The method includes: determining the preset rolling force of multiple passes according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient; determining the preset deformation of multiple passes according to the preset rolling force and the material parameters of the rolling object; calculating the actual rolling force and actual deformation of multiple passes according to the sum of the preset deformation of multiple passes and the total rolling deformation; when the actual rolling force and actual deformation of multiple passes meet the preset requirements, the rolling mill is controlled to perform multiple rolling processes on the rolling object according to the actual rolling force and actual deformation. The problem of low control efficiency and accuracy due to the difficulty of solving the problem in the related art when the rolling procedure is calculated according to the rolling force distribution coefficient is solved.

Description

Technical Field

[0001] The present application relates to the field of rolling mills, and more specifically, to a rolling mill control method and device, a storage medium, and an electronic device. Background Art

[0002] As the key to the rough rolling process control model, the calculation of the hot rolling rough rolling schedule is the basis for the stability of the production process and has an important impact on the plate shape, thickness and other indicators of the finished product. If the rolling schedule is set unreasonably, it will cause damage to equipment such as the rolling mill and motor, and bring about a series of problems such as increased roll wear and shortened roll replacement cycle, affecting the production rhythm.

[0003] The rough rolling procedure mainly involves two relative calculation methods. One is to calculate the reduction amount of each pass according to the reduction rate distribution coefficient, and then realize the distribution of rolling load; the other is to realize the distribution of reduction load of each pass according to the rolling force proportional distribution coefficient. For the former, since this method uses the reduction amount as a known condition to solve the rolling force of each pass, it is impossible to know the relative size relationship of the rolling force of each pass in advance. If the relative relationship of the rolling force of each pass is to be specified in advance, the second calculation method needs to be adopted. The reverse calculation of the reduction amount from the rolling force involves the solution and calculation of the implicit equation, and it is necessary to meet the multi-pass coupling conditions at the same time, which makes the solution difficult. Therefore, the technical difficulty of the prior art method is how to reversely obtain the reduction amount of each pass through the rolling force proportional distribution coefficient, the rough rolling entrance thickness and the target rough rolling exit thickness.

[0004] In the related technology, when controlling the rolling procedure, the distribution of the down-load of each pass is achieved according to the rolling force proportional distribution coefficient. However, it is difficult to solve the rolling force distribution coefficient, which leads to low control efficiency and accuracy. No effective solution has been proposed yet. Summary of the invention

[0005] The main purpose of the present application is to provide a rolling mill control method and device, a storage medium, and an electronic device to solve the problem that when controlling the rolling schedule in the related technology, the distribution of the down-load of each pass is realized according to the rolling force proportional distribution coefficient. The solution of the rolling force distribution coefficient is difficult, resulting in low control efficiency and accuracy.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a rolling mill control method is provided, including: determining a preset rolling force for multiple passes according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient; determining a preset deformation for multiple passes according to the preset rolling force and the material parameters of the rolling object; calculating the actual rolling force and actual deformation for multiple passes according to the sum of the preset deformations for the multiple passes and the total rolling deformation; when the actual rolling force and actual deformation of multiple passes meet the preset requirements, controlling the rolling mill to perform the multiple rolling processes on the rolling object according to the actual rolling force and the actual deformation.

[0007] Optionally, before determining the preset rolling forces of multiple passes based on the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient, the method also includes: determining the limit reduction of the rolling mill based on the maximum bite angle and the roller radius of the rolling mill; determining the total rolling passes based on the limit reduction, the bite safety factor and the total rolling deformation; determining the rolling force distribution coefficient of multiple passes based on the preset initial rolling force distribution coefficient, the rolling force correction coefficient, and the total rolling passes; determining the preset rolling force of each pass based on the rolling force distribution coefficient and the preset reference rolling force.

[0008] Optionally, determining the preset deformation amounts of multiple passes according to the preset rolling force and the material parameters of the rolled object includes: determining the deformation resistance formula and the friction influence coefficient formula of the material according to the material of the rolled object, wherein the deformation resistance formula and the friction influence coefficient formula are both calculated through the deformation amounts of the corresponding passes; determining the functional relationship between the preset rolling force and multiple variables according to the preset rolling force, rolling mill parameters, and a rolling force calculation model, wherein the rolling force calculation model includes the deformation resistance formula and the friction influence coefficient formula, and the multiple variables include the preset deformation amount corresponding to the preset rolling force, and iterative variables for each pass; determining the functional relationship between the iterative variables and the preset rolling force and the preset deformation amount; and iterating by substituting the functional relationship of the preset rolling force into the functional relationship of the iterative variables until the iteration stop condition is met, thereby determining the preset deformation amount for each pass.

[0009] Optionally, the function relationship of the preset rolling force is substituted into the function relationship of the iterative variable for iteration until the iteration stop condition is met, and the preset deformation amount of each pass is determined, including: determining the initial value of the iterative variable of the first pass; according to the initial value, the preset rolling force of the first pass is substituted into the function relationship of the rolling force to calculate the preset deformation amount; the calculated preset deformation amount is substituted into the function relationship of the iterative variable to determine the calculated value of the iterative variable; according to the initial value and the calculated value of the iterative variable, it is determined whether the iteration stop condition is met; if the initial value and the calculated value meet the iterative stop condition, the calculated preset deformation amount is used as the preset deformation amount of the first pass, and the preset deformation amount of the next pass is calculated; if the initial value and the calculated value do not meet the iterative stop condition, the calculated value of the iterative variable is used as the initial value, and the preset deformation amount and the calculated value of the iterative variable are iteratively calculated until the initial value and the calculated value of the iterative variable meet the iterative stop condition.

[0010] Optionally, calculating the actual rolling force and actual deformation of multiple passes based on the sum of the preset deformations of the multiple passes and the total rolling deformation includes: determining a preset total deformation based on the preset deformations of the multiple passes; solving the expression of the preset total deformation based on the principle that the total rolling deformation is equal to the preset total deformation to determine the actual benchmark rolling force; determining the actual rolling force and actual deformation based on the actual benchmark rolling force.

[0011] Optionally, the method further includes: if the actual rolling force and / or actual deformation of the multiple passes do not meet the preset requirements, adjusting the rolling force distribution coefficient; and re-determining the actual rolling force and actual deformation of the multiple passes according to the adjusted rolling force distribution coefficient until the actual rolling force and the actual deformation meet the preset requirements.

[0012] Optionally, when the actual rolling force and / or actual deformation of multiple passes do not meet the preset requirements, adjusting the rolling force distribution coefficient includes: determining whether the actual rolling force meets the first requirement of the rolling work of the rolling mill, wherein the first requirement is that the actual rolling force does not exceed the safety value of the maximum design rolling force of the rolling mill; and / or determining whether the actual deformation meets the second requirement of the rolling mill, wherein the second requirement is that the actual deformation does not exceed the limit reduction; the preset requirements include the first requirement and / or the second requirement.

[0013] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a rolling mill control device is provided, including: a first determination module, used to determine the preset rolling force of the total rolling pass and multiple passes according to the total rolling deformation and the rolling force distribution coefficient; a second determination module, used to determine the preset deformation of multiple passes according to the preset rolling force and the material parameters of the rolling object; a third determination module, used to calculate the actual rolling force and actual deformation of multiple passes according to the sum of the preset deformation of the multiple passes and the total rolling deformation; a control module, used to control the rolling mill to perform the multiple rolling processes on the rolling object according to the actual rolling force and the actual deformation when the actual rolling force and the actual deformation of the multiple passes meet the preset requirements.

[0014] According to another aspect of the present application, a computer-readable storage medium is also provided, wherein the storage medium is used to store a program, wherein the program executes any one of the rolling mill control methods described above.

[0015] According to another aspect of the present application, an electronic device is also provided, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the rolling mill control methods described above.

[0016] Through the present application, the following steps are adopted: according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient, the preset rolling force of multiple passes is determined; according to the preset rolling force and the material parameters of the rolling object, the preset deformation of multiple passes is determined; according to the sum of the preset deformation of multiple passes and the total rolling deformation, the actual rolling force and actual deformation of multiple passes are calculated; when the actual rolling force and actual deformation of multiple passes meet the preset requirements, the rolling mill is controlled to perform multiple rolling processes on the rolling object according to the actual rolling force and the actual deformation.

[0017] According to the total rolling deformation and the rolling force distribution coefficient, the preset rolling force of the total rolling pass and multiple passes is determined; according to the preset rolling force and the material parameters of the rolling object, the preset deformation of multiple passes is determined; according to the principle that the preset deformation is equal to the actual deformation, the actual rolling force and actual deformation of each pass are calculated. And according to the determination results of the actual rolling force and the actual deformation, the rolling force distribution coefficient is adjusted and optimized, and finally the purpose of determining the rolling force and deformation is achieved, the difficulty of solving the rolling force distribution coefficient is effectively reduced, and the preset accuracy and efficiency of the rolling procedure are achieved, thereby improving the efficiency and accuracy of rolling control. The technical effect is solved, and the method of realizing the distribution of the down-load of each pass according to the rolling force proportional distribution coefficient when controlling the rolling procedure in the related technology is solved. The difficulty in solving the rolling force distribution coefficient is large, resulting in low control efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 is a flow chart of a rolling mill control method provided according to an embodiment of the present application;

[0020] Figure 2 It is a flow chart of a method for designing a rolling schedule for hot rolling and rough rolling according to an embodiment of the present application;

[0021] Figure 3 is a flow chart of a method for determining total rolling passes provided in accordance with an embodiment of the present application;

[0022] Figure 4 is a flow chart of a method for determining a preset rolling force according to an embodiment of the present application;

[0023] Figure 5 It is a flow chart of a method for determining a deformation resistance formula and a friction influence coefficient of a rolling object provided in an embodiment of the present application;

[0024] Figure 6 is a flow chart of a method for determining a preset deformation amount provided in an embodiment of the present application;

[0025] Figure 7 is a flow chart of a method for actual rolling force and actual deformation provided according to an embodiment of the present application;

[0026] Figure 8 is a schematic diagram of a rolling mill control device provided according to an embodiment of the present application;

[0027] Fig. 9It is a schematic diagram of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] The present invention is described below in conjunction with preferred implementation steps. Figure 1 is a flow chart of a rolling mill control method provided according to an embodiment of the present application, such as Figure 1 As shown, the method comprises the following steps:

[0032] Step S101, determining a preset rolling force for a plurality of passes according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient;

[0033] Step S102, determining preset deformation amounts of multiple passes according to preset rolling force and material parameters of the rolling object;

[0034] Step S103, calculating the actual rolling force and actual deformation of the multiple passes according to the sum of the preset deformation of the multiple passes and the total rolling deformation;

[0035] Step S104, when the actual rolling force and the actual deformation of the multiple passes meet the preset requirements, the rolling mill is controlled to perform multiple passes of rolling processing on the rolling object according to the actual rolling force and the actual deformation.

[0036] Through the above steps, the preset rolling force of multiple passes is determined according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient; the preset deformation of multiple passes is determined according to the preset rolling force and the material parameters of the rolling object; the actual rolling force and actual deformation of each pass are calculated according to the principle that the preset deformation is equal to the actual deformation. The rolling force distribution coefficient is adjusted and optimized according to the determination results of the actual rolling force and the actual deformation, and finally the purpose of determining the rolling force and deformation is achieved, the difficulty of solving the rolling force distribution coefficient is effectively reduced, the preset accuracy and efficiency of the rolling schedule are achieved, and the technical effect of improving the efficiency and accuracy of rolling control is achieved, and the problem of difficulty in solving the rolling force distribution coefficient, which leads to low control efficiency and accuracy, is solved in the related technology when the rolling schedule is controlled according to the rolling force proportional distribution coefficient to realize the distribution of the down-load of each pass.

[0037] The execution subject of the above steps can be a processor, a calculator, a server, etc., a device with data computing and data analysis and processing capabilities. In addition, it can also be a device with the above-mentioned devices with data computing, analysis and processing capabilities, for example, a computer with a processor, a smart phone, a wearable device, etc., a data system with a server, a computing system, etc. The above-mentioned execution subject can be a rolling mill control device, which can control the rolling mill and calculate and determine the rolling schedule of the rolling mill according to the rolling process of the rolling object and the equipment parameters of the rolling mill.

[0038] In the above step S101, the total rolling pass and the preset rolling force of multiple passes are determined according to the total rolling deformation and the rolling force distribution coefficient. It may include multiple calculation steps. Optionally, determining the preset rolling force of multiple passes according to the total rolling deformation, the total rolling pass, the rolling force distribution coefficient, and the total rolling pass includes: determining the rolling force distribution coefficient of multiple passes according to the preset initial rolling force distribution coefficient and the rolling force correction coefficient; determining the preset rolling force of multiple passes according to the rolling force distribution coefficient and the preset reference rolling force.

[0039] The above-mentioned total rolling passes can be determined according to the rolling process, but considering the actual working capacity of the rolling mill, when determining the total rolling passes, the hardware parameters of the rolling mill are mainly considered, that is, the rolling capacity of a single pass that the rolling mill can achieve. Specifically, when determining the total rolling passes of the rolling mill, the limit reduction of the rolling mill can be determined according to the maximum bite angle of the rolling mill and the radius of the roller; the total rolling passes are determined according to the limit reduction, the bite steel safety factor and the actual total rolling deformation. Thereby, the rationality of the total rolling passes is guaranteed, so that the determined total rolling passes can be effectively executed by the rolling mill.

[0040] Before determining the preset rolling forces of multiple passes according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient, the method also includes: determining the limit reduction of the rolling mill according to the maximum bite angle of the rolling mill and the radius of the pressure roller; determining the total rolling passes according to the limit reduction, the bite safety factor and the total rolling deformation.

[0041] Specifically, the thickness H at the entrance of the rough rolling process is obtained. 1 And the outlet thickness h N , the total variable Δh=H is calculated 1 -h N ; In order to ensure that the strip steel of each pass bites into the rolling mill normally, it is necessary to limit the total rolling pass N and reasonably distribute the deformation of each pass. The average deformation Δh / N is required <aΔh max , where a is the safety factor of steel biting, generally 0.6 to 0.8, Δh max It represents the limit reduction, which is determined by the steel biting condition and is calculated according to the following formula:

[0042]

[0043] Where θ is the maximum bite angle of the roughing mill and R is the roller radius.

[0044] According to the preset initial rolling force distribution coefficient and the rolling force correction coefficient, the rolling force distribution coefficients of multiple passes are determined; according to the rolling force distribution coefficient and the preset reference rolling force, the preset rolling force of multiple passes is determined. The above-mentioned initial rolling force distribution coefficient may be a preset rolling force distribution coefficient. The rolling force distribution coefficient is also used to determine the distribution coefficient of the rolling force of each pass. The initial rolling force distribution coefficient is usually unable to meet the use requirements. Therefore, the rolling force correction coefficient is used for correction, and through the limiting conditions of the rolling force distribution coefficient, it is determined whether the corrected rolling force distribution coefficient meets the requirements. If it does not meet the requirements, further correction is made so that the corrected rolling force distribution coefficient meets the above limiting conditions. The rolling force correction coefficient is also a coefficient used to correct the rolling force.

[0045] For example, after determining the total rolling pass N, the initial rolling force distribution coefficient α is given 0i and rolling force correction factor η i (i=1~N, i is an integer). The rolling force distribution coefficient α can be obtained i Calculation formula: α i =α 0i ·(1+η i ), in order to ensure production stability, the difference between the rolling forces of each pass should not be too large. The specific limiting condition can be: 0.5≤α i ≤1.5 (i=1~N, i is an integer).

[0046] Setting the reference rolling force Pm The rolling force ratio P of each pass is known. i / P j =α i / α j (i, j = 1 ~ N), according to the rolling force distribution coefficient α i The preset rolling force P for each pass can be calculated i :P i =P m α i .

[0047] In the above step S102, the preset deformation amounts of multiple passes are determined according to the preset rolling force and the material parameters of the rolling object. Optionally, the preset deformation amounts of multiple passes are determined according to the preset rolling force and the material parameters of the rolling object, including: determining the deformation resistance formula and the friction influence coefficient formula of the material according to the material of the rolling object, wherein the deformation resistance formula and the friction influence coefficient formula are both calculated by the deformation amount of the corresponding pass; determining the functional relationship between the preset rolling force and multiple variables according to the preset rolling force, the rolling mill parameters, and the rolling force calculation model, wherein the rolling force calculation model includes the deformation resistance formula and the friction influence coefficient formula, and the multiple variables include the preset deformation amount corresponding to the preset rolling force, and the iteration variables of each pass; determining the functional relationship between the iteration variables and the preset rolling force and the preset deformation amount; according to the functional relationship of the iteration variables, the functional relationship of the preset rolling force is brought into iteratively until the iteration stop condition is met, and the preset deformation amount of each pass is determined.

[0048] The deformation resistance formula and friction influence coefficient formula of the rolling object are determined according to the material parameters of the rolling object. The deformation resistance formula and friction influence coefficient formula are calculated by the deformation amount of the corresponding pass. The deformation resistance formula and friction influence coefficient of the material of the rolling object can be obtained through simulation experiments. That is, the deformation resistance formula and friction influence coefficient of a certain material can be determined through multiple experiments.

[0049] Specifically, first determine the deformation resistance formula as Wherein, T is the deformation temperature, which is set by the thermal simulation test machine; e is the true strain, which can be calculated by the logarithmic strain formula e=ln(H / h), H is the inlet thickness, and h is the outlet thickness; The strain rate can be expressed by the formula Calculate, where v R is the roller speed, lc′ is the contact arc length when the roller is elastically flattened, Parameters can also be set through a thermal simulation test machine; a, b, c, d, and n are model coefficients. For the specified steel type of the rolling object, the deformation resistance value at different deformation temperatures and strain rates is obtained through thermal simulation experiments, and multiple sets of data are used according to the deformation resistance formula structure. By performing multivariate nonlinear regression, the model coefficient of the steel grade can be obtained. Then, based on the model coefficient, the deformation resistance formula corresponding to the material of the rolling object can be determined.

[0050] The friction coefficient Q p It can be calculated by empirical formula: Where l c ' is the contact arc length when the roller is elastically flattened, R′ represents the roller radius after elastic flattening.

[0051] The above-mentioned functional relationship between the actual rolling force and multiple variables is determined based on the actual deformation, rolling mill parameters, and rolling force calculation model, wherein the rolling force calculation model includes a deformation resistance formula and a friction force influence coefficient formula, and multiple variables include the actual deformation corresponding to the actual rolling force, and iterative variables of each pass. The above-mentioned iterative variable can be an elastic flattening radius. The above-mentioned rolling force calculation model can be P=Bl c 'Q p βσ, B is the strip width; l c ' is the contact arc length when the roller is elastically flattened, which is determined by the inlet thickness H, outlet thickness h, and elastic flattening radius R'; Q P is the friction coefficient, which is determined by the contact arc length l c ′, inlet thickness H, outlet thickness h; β is the intermediate stress influence coefficient, under plane strain state, the value is 1.15; σ is the deformation resistance, which is determined by the deformation temperature T, inlet thickness H, outlet thickness h, roller speed v R , contact arc length l c The functional relationship between the rolling force and the variable in each pass is:

[0052] P i =f(B, T, H i 、h i 、v R , R i )

[0053] When determining the functional relationship between the iteration variable and the actual rolling force and the actual deformation, the iteration variable may be the roller elastic flattening radius R′, which may be expressed by the following formula: Where R is the initial radius of the roller without considering elastic flattening; m is a constant coefficient related to the material. For steel rollers, the value is generally 1.1×10 -5 MPa -1The functional relationship between the elastic flattening radius Ri′ of each pass and multiple variables including the actual rolling force and the actual deformation is obtained: R i '=g(R、B、P i , H i 、h i ).

[0054] Optionally, the function relationship of the preset rolling force is substituted into the function relationship of the iteration variable for iteration until the iteration stop condition is met, and the preset deformation amount of each pass is determined, including: determining the initial value of the iteration variable of the first pass; according to the initial value, the preset rolling force of the first pass is substituted into the function relationship of the rolling force to calculate the preset deformation amount; substituting the calculated preset deformation amount into the function relationship of the iteration variable to determine the calculated value of the iteration variable; according to the initial value and the calculated value of the iteration variable, determining whether the iteration stop condition is met; when the initial value and the calculated value meet the iteration stop condition, the calculated preset deformation amount is used as the preset deformation amount of the first pass, and the preset deformation amount of the next pass is calculated; when the initial value and the calculated value do not meet the iteration stop condition, the calculated value of the iteration variable is used as the initial value, and the preset deformation amount and the calculated value of the iteration variable are iteratively calculated until the initial value and the calculated value of the iteration variable meet the iteration stop condition.

[0055] Specifically, the initial value R of the first elastic flattening radius iteration can be preset 1 =R,

[0056] And P 1 =P m α 1 Substitute into the rolling force calculation formula P 1 =f(B, T, H 1 、h 1 、v R , R″ 1 ), and get the preset exit thickness of the first pass:

[0057] h 1 =f(B, T, H 1 , α 1 , P m 、v R , R″ 1 )

[0058] h 1 Substitute the formula for elastic flattening radius R′ into the formula to calculate the first pass elastic flattening radius:

[0059] R' 1 =g(R, B, α 1 , P m , H 1 、h 1 )

[0060] Judgement | R' 1 -R″ 1 |≤Δ, Δ is the allowed value of iteration. If the inequality does not hold, modify the iteration radius R 1 ″ is R 1 =R 1 ′, recalculate the preset exit thickness h of the first pass 1 , start the next round of iteration until the inequality is established, and finally output the preset exit thickness h of the first pass 1 And preset deformation Δh 1 .

[0061] Set the first pass to preset the exit thickness h 1 As a known quantity, repeat the above steps and iterate continuously until the preset outlet thickness h of the Nth pass is obtained. N and preset deformation Δh N .

[0062] Step S103, calculating the actual rolling force and actual deformation of multiple passes according to the sum of the preset deformation of multiple passes and the total rolling deformation. Optionally, calculating the actual rolling force and actual deformation of multiple passes according to the sum of the preset deformation of multiple passes and the total rolling deformation includes: determining the preset total deformation according to the preset deformation of multiple passes; solving the expression of the preset total deformation according to the principle that the total rolling deformation is equal to the preset total deformation to determine the actual reference rolling force; determining the actual rolling force and actual deformation according to the actual reference rolling force.

[0063] Preset deformation Δh for each pass i , the preset deformation of multiple passes is summed up to get the preset total deformation This is the reference rolling force P m A single variable function The target deformation of the rough rolling process The reference rolling force P can be obtained by solving m , and then calculate the actual rolling force P of each pass i And the actual deformation Δh i .

[0064] Step S104, when the actual rolling force and actual deformation of multiple passes meet the preset requirements, the rolling mill is controlled to perform multiple passes of rolling processing on the rolling object according to the actual rolling force and the actual deformation. When the actual rolling force and / or the actual deformation of multiple passes do not meet the preset requirements, the rolling force distribution coefficient is adjusted; according to the adjusted rolling force distribution coefficient, the actual rolling force and the actual deformation of multiple passes are re-determined until the actual rolling force and the actual deformation meet the preset requirements.

[0065] When the actual rolling force and / or actual deformation of multiple passes do not meet the preset requirements, the rolling force distribution coefficient is adjusted, including: determining whether the actual rolling force meets the first requirement of the rolling work of the rolling mill, wherein the first requirement is that the actual rolling force does not exceed the safety value of the maximum design rolling force of the rolling mill; and / or determining whether the actual deformation meets the second requirement of the rolling mill, wherein the second requirement is that the actual deformation does not exceed the limit reduction; the preset requirements include the first requirement and / or the second requirement.

[0066] The actual rolling force P in each pass i and the actual deformation Δh i After the actual rolling force P of each pass is determined, i Determine whether the rolling force inequality P is satisfied i ≤bP max , which is the first requirement, P max is the design capacity of the rolling mill, b is the safety factor, generally 0.8, bP max This is the safety value of the maximum design rolling force mentioned above. If the rolling force inequality does not hold, the rolling force coefficient is redistributed. The specific distribution method is as follows: For the initial rolling force distribution coefficient α 0i , let α 0max =α 0max *0.95, α 0min =α 0min *1.05, after correcting the two limit rolling force distribution coefficients, the rough rolling schedule is recalculated.

[0067] If the rolling force inequality holds, the actual deformation of each pass Δh i Determine whether the deformation inequality Δh is satisfied i ≤Δh max , which is the second requirement. max If the deformation inequality does not hold, the rolling force coefficient is redistributed as follows: Find the reduction Δh that fails the judgment error The corresponding initial rolling force distribution coefficient α 0error , let α 0error =α 0error *0.95, α 0min =α 0min *1.05, after correcting the above two parameters, repeat the calculation process of the rough rolling schedule. If the deformation inequality is established, output the actual rolling force and outlet thickness of each pass, and complete the calculation of the rough rolling schedule.

[0068] That is, when the actual rolling force and / or actual deformation of multiple passes do not meet the preset requirements, the rolling force distribution coefficient is adjusted; based on the adjusted rolling force distribution coefficient, the actual rolling force and actual deformation of multiple passes are re-determined until the actual rolling force and actual deformation both meet the preset requirements.

[0069] In addition, according to the actual rolling force and the actual deformation, the rolling mill is controlled to perform multiple rolling processes on the rolling object. The above-mentioned actual rolling force and actual deformation, as well as the corresponding rolling force distribution coefficient, can be sent to the rolling mill to control the rolling mill to perform rolling operations on the rolling object. The rolling mill can be provided with its own computing device, which is connected to the above-mentioned execution subject, receives the actual rolling force and actual deformation sent by the execution subject of the above steps, and automatically generates a corresponding rolling procedure to control the rolling mill to perform rolling work. When the rolling mill rolls the rolling object, an operator can select the rolling procedure corresponding to the rolling object. Or the rolling mill automatically identifies the rolling object, thereby automatically triggering the corresponding rolling procedure to perform rolling operations on the rolling object.

[0070] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be executed in an order different from that shown here.

[0071] It should be noted that the present application also provides an optional implementation, which is described in detail below.

[0072] This embodiment provides a rolling schedule design method for hot rolling and rough rolling, which belongs to the technical field of rough rolling of plate and strip. The method can preset the rolling force of each pass according to the initial rolling force distribution coefficient and the rolling force correction coefficient; and calculate the preset deformation of each pass through the rolling force model iteration; and calculate the actual rolling force and outlet thickness of each pass according to the principle that the preset deformation is equal to the actual deformation. And according to the judgment result, the adjustment and optimization of the rough rolling force distribution coefficient are carried out, and finally the calculation of the rough rolling schedule is completed, which effectively improves the preset accuracy of the rough rolling strip rolling schedule and the rough rolling stability. An offline calculation model for the rough rolling schedule is established through the python development environment. After obtaining the correlation coefficient, the offline simulation calculation of the rolling force and outlet thickness of each pass of rough rolling can be realized, and the rolling force distribution coefficient is optimized according to the feedback result, which has a certain flexibility.

[0073] Figure 2 is a flow chart of a method for designing a hot rolling and rough rolling rolling schedule according to an embodiment of the present application, such as Figure 2 As shown, the technical solution provided by this embodiment is as follows:

[0074] S1. Determine the total rolling pass N according to the total deformation Δh of the rough rolling process;

[0075] S2, given initial rolling force distribution coefficient α 01 :···:α 0i :···:α 0N , which is simplified to α 0i Indicates that the rolling force correction coefficient η 1 :···:η i :···:η N , which is simplified to η i Indicates that according to the rolling force distribution coefficient α i Preset rolling force P for each pass i ;

[0076] S3. Select a specific steel type, obtain the deformation resistance equation σ through thermal simulation experiments, and calculate the friction influence coefficient Q p ;

[0077] S4. Through the rolling force model P = Bl c 'Q p βσ iteratively calculates the preset deformation Δh for each pass i ;

[0078] S5, according to the total variable Δh and the preset deformation The actual rolling force P of each pass is calculated based on the principle of equality. i , and obtain the actual exit thickness h of each pass i Then the result is determined and the rolling force distribution coefficient is optimized, and finally the rough rolling schedule is preset;

[0079] S6. With the help of Python development environment, an offline calculation model for rough rolling procedure is established. After obtaining the correlation coefficient, the outlet thickness h of each rough rolling pass can be completed. i Offline and convenient computing.

[0080] Figure 3 is a flow chart of a method for determining the total rolling passes provided in an embodiment of the present application. The specific process of step S1 is as follows: Figure 3 As shown, the following steps are included:

[0081] S11. Obtaining the entrance thickness H of the rough rolling process 1 And the outlet thickness h N , the total variable Δh=H is calculated 1 -h N ;

[0082] S12. To ensure that the strip steel of each pass can normally bite into the rolling mill, it is necessary to limit the total rolling pass N and reasonably distribute the deformation of each pass. The average deformation Δh / N is required <aΔh max, where a is the safety factor of steel biting, generally 0.6 to 0.8, Δh max It represents the limit reduction, which is determined by the steel biting condition and is calculated according to the following formula:

[0083]

[0084] Where θ is the maximum bite angle of the roughing mill and R is the roller radius.

[0085] Figure 4 is a flow chart of a method for determining a preset rolling force according to an embodiment of the present application. The specific process of step S2 is as follows: Figure 4 As shown, the following steps are included:

[0086] S21. After determining the total rolling pass N, the initial rolling force distribution coefficient α is given. 0i and rolling force correction factor η i (i=1~N, i is an integer). The rolling force distribution coefficient α can be obtained i Calculation formula:

[0087] α i =α 0i ·(1+η i )

[0088] In order to ensure production stability, the difference in rolling force between each pass should not be too large, so it is limited to 0.5≤α i ≤1.5 (i=1~N, i is an integer).

[0089] S22, preset reference rolling force P m The rolling force ratio P of each pass is known. i / P j =α i / α j (i, j = 1 ~ N), according to the rolling force distribution coefficient α i The preset rolling force P for each pass can be calculated i :

[0090] P i =P m α i

[0091] Figure 5 is a flow chart of a method for determining a deformation resistance formula of a rolling object and a friction influence coefficient according to an embodiment of the present application. The specific process of step S3 is as follows: Figure 5 As shown, the following steps are included:

[0092] S31, using deformation resistance formula structure Where T is the deformation temperature, which is preset by a thermal simulation test machine; e is the true strain, which can be calculated by the logarithmic strain formula e=ln(H / h), H is the inlet thickness, and h is the outlet thickness; The strain rate can be expressed by the formula Calculate, where v R is the roller speed, lc′ is the contact arc length when the roller is elastically flattened, Parameters can also be preset through a thermal simulation test machine; a, b, c, d, and n are model coefficients.

[0093] S32. For the specified steel type, the deformation resistance values ​​at different deformation temperatures and strain rates are obtained through thermal simulation experiments. Multiple sets of data are used according to the deformation resistance formula structure. By performing multivariate nonlinear regression, the model coefficients of this steel grade can be obtained.

[0094] S33, friction influence coefficient Q p It can be calculated by empirical formula:

[0095]

[0096] Where lc′ is the contact arc length when the roller is elastically flattened. R′ represents the roller radius after elastic flattening.

[0097] Figure 6 is a flow chart of a method for determining a preset deformation amount according to an embodiment of the present application. The specific process of step S4 is as follows: Figure 6 As shown, the following steps are included:

[0098] S41. For the rolling force model P=Bl c 'Q p βσ, B is the strip width; lc′ is the contact arc length when considering the elastic flattening of the roller, which is determined by the entrance thickness H, the exit thickness h, and the elastic flattening radius R′; Q P is the friction coefficient, which is determined by the contact arc length l c ′, inlet thickness H, outlet thickness h; β is the intermediate stress influence coefficient, under plane strain state, the value is 1.15; σ is the deformation resistance, which is determined by the deformation temperature T, inlet thickness H, outlet thickness h, roller speed v R , contact arc length l c ' is determined by the above conditions. The functional relationship between the rolling force and the variable in each pass can be obtained:

[0099] P i =f(B, T, H i 、h i 、v R , R' i )

[0100] S42. The elastic flattening radius R' of the roller can be expressed by the following formula:

[0101]

[0102] In the formula, R is the initial radius of the roller without considering elastic flattening; m is a constant coefficient related to the material. For steel rollers, it is generally taken as 1.1×10-5MPa-1. Thus, the elastic flattening radius R of each pass is obtained. i The functional relationship between ′ and variables:

[0103] R' i =g(R, B, P i , H i 、h i )

[0104] S43, preset the initial value R of the first elastic flattening radius iteration 1 =R, and P 1 =P m α 1 Substitute into the rolling force calculation formula P 1 =f(T,H 1 、h 1 、v R , R″ 1 ), and obtain the preset exit thickness of the first pass:

[0105] h 1 =f(B, T, H 1 , α 1 , P m 、v R , R″ 1 )

[0106] h 1 Substitute the formula for elastic flattening radius R′ into the formula to calculate the first pass elastic flattening radius:

[0107] R' 1 =g(R, B, α 1 , P m , H 1 、h 1 )

[0108] Judgement | R' 1 -R″ 1 |≤Δ, Δ is the allowed value of iteration. If the inequality does not hold, modify the iteration radius R 1 ″ is R 1 =R 1 ′, recalculate the preset exit thickness h of the first pass 1, start the next round of iteration until the inequality is established, and finally output the preset exit thickness h of the first pass 1 And preset deformation Δh 1 .

[0109] S44, set the first pass preset exit thickness h 1 As a known quantity, repeat step S43 and iterate continuously until the preset outlet thickness h of the Nth pass is obtained. N and preset deformation Δh N .

[0110] Figure 7 is a flow chart of the actual rolling force and actual deformation method provided in the embodiment of the present application, and the specific process of step S5 is as follows Figure 7 As shown, the following steps are included:

[0111] S51, the preset deformation amount Δh of each pass is known i , calculate the preset total deformation This is the reference rolling force P m A single variable function The target deformation of the rough rolling process The reference rolling force P can be obtained by solving m , and then calculate the actual rolling force P of each pass i And the actual deformation Δh i .

[0112] S52, the actual rolling force P of each pass i Determine whether the inequality P is satisfied i ≤bP max , P max is the design capacity value of the rolling mill, and b is the safety value, which is generally taken as 0.8. If the inequality does not hold, return to S21 to redistribute the rolling force coefficient. The specific allocation method is as follows:

[0113] For the initial rolling force distribution coefficient α 0i , let α 0max =α 0max *0.95, α 0min =α 0min *1.05, after correcting the two limit rolling force distribution coefficients, the rough rolling schedule is recalculated.

[0114] If the inequality holds, go to S53.

[0115] S53, the actual deformation amount Δh of each pass i Determine whether the inequality Δh is satisfied i ≤Δh max . Δh max Indicates the limit pressure reduction.

[0116] If the inequality does not hold, return to S21 to redistribute the rolling force coefficient. The distribution method is as follows:

[0117] Find the failure depression Δh error The corresponding initial rolling force distribution coefficient α 0error , let α 0error =α 0error *0.95, α 0min =α 0min *1.05, after correcting the above two parameters, repeat the calculation process of the rough rolling schedule.

[0118] If the inequality holds, the actual rolling force and exit thickness of each pass are output to complete the calculation of the rough rolling schedule.

[0119] The above step S6 includes the following steps: using the python development environment to establish an offline calculation model for the rough rolling schedule. After the rolling force distribution coefficient, rolling force correction coefficient, rough rolling entry thickness, rough rolling exit thickness, roll radius, roll speed, deformation temperature, strip width, and deformation resistance curve equation are given, the thickness of each pass and the preset rolling force value can be output to complete the calculation of the rough rolling schedule.

[0120] The method of this embodiment can adjust and optimize the rough rolling force distribution coefficient according to the judgment result; an offline calculation model for the rough rolling procedure is established through Python. After obtaining the relevant coefficient, the offline simulation calculation of the rolling force and outlet thickness of each rough rolling pass can be realized, and the rolling force distribution coefficient can be optimized according to the feedback result, which has a certain flexibility.

[0121] For example, in a 1450 hot rolled plate production line, the inlet thickness of the rough rolling unit is 190mm, and the outlet thickness is 48mm, that is, the total deformation of rough rolling Δh is (190-48) = 142mm. The relevant parameters of the rough rolling unit are shown in Table 1. Table 1 is a table of relevant parameters of the rough rolling unit. According to the steel bite formula:

[0122]

[0123] The rough rolling limit reduction Δh is calculated max ≈45mm. Define the safety bite coefficient a=0.7, according to the inequality Δh / N <aΔh max , calculate the minimum allowable rolling passes N = 5.

[0124] Table 1 Roughing mill related parameters

[0125] parameter Roller radius R Maximum bite angle θ Safety factor of steel biting Numeric 500mm 18° 0.7

[0126] Given the initial rolling force distribution coefficient and correction coefficient, according to the formula αi =α 0i ·(1+η i ) is calculated to obtain the rolling force distribution coefficient, as shown in Table 2, which is a table of rolling force distribution coefficients for each pass. Define the reference rolling force Pm, according to the rolling force distribution coefficient α i Preset rolling force P for each pass 1 =0.78Pm;P 2 =0.85Pm;P 3 =0.84Pm;P 4 =0.9Pm;P 5 =0.78Pm.

[0127] Table 2 Rolling force distribution coefficient table for each pass

[0128] <![CDATA[P 1 ]]> <![CDATA[P 2 ]]> <![CDATA[P 3 ]]> <![CDATA[P 4 ]]> <![CDATA[P 5 ]]> <![CDATA[Initial rolling force distribution coefficient α 0i > 0.78 0.85 0.88 0.95 0.85 <![CDATA[Correction factor η i > 0 0 -5％ -8％ -8％ <![CDATA[Rolling force distribution coefficient α i > 0.78 0.85 0.84 0.9 0.78

[0129] For the deformation resistance equation Since the model is a nonlinear equation, it can be transformed into a multivariate linear equation mechanism by replacing variables. Taking the logarithm on both sides of the equation, we get:

[0130]

[0131] Let y = lnσ, x 1 =T, x 4 =Tlne, then the above equation is transformed into a linear equation:

[0132] y=a+bx 1 +cx 2 +dx 3 +nx 4

[0133] The deformation resistance values ​​at different deformation temperatures and strain rates were obtained through thermal simulation experiments. The above data were processed by multivariate linear regression using the least squares method using python software, and all unknown parameter values ​​were determined to be a=8.3388, b=-0.0035, c=1.5698, d=-0.0017, and n=0.2516. Therefore, the deformation resistance equation is:

[0134]

[0135] Considering the friction coefficient Q p After that, the final rolling force calculation formula is obtained:

[0136] Where B is the strip width, which is 1250 mm, R' is the radius of the elastic flattening roller, H is the entry thickness of each pass, h is the exit thickness of each pass, T is the deformation temperature, is the strain rate, and e is the relative strain. Since R' is an unknown quantity, it needs to be solved by iteration, where the calculation formula of R' is:

[0137]

[0138] Where R is the initial radius of the roller without considering elastic flattening; m is a constant coefficient with a value of 1.1×10-5MPa-1, and P is the rolling force of this pass.

[0139] For the first pass, let the initial radius of elastic flattening R” = R = 500 mm and substitute it into the rolling force calculation formula, where the first pass rolling force P 1 =0.78P m , solve for the first pass exit thickness h 1 . 1 Substitute the elastic flattening radius formula to calculate R' and determine |R' i -R″ i |≤Δ, if the inequality does not hold, let R”=R' i , return to re-iterate the calculation of h 1 , until the inequality is satisfied, output the first pass exit thickness h 1 and deformation Δh 1 . Where h1 and Δh 1 Both and P m Related univariate functions.

[0140] h 1 As a known condition, the preset deformation Δh of the five passes is solved in sequence according to the above method. i , let the preset total deformation be:

[0141]

[0142] Substitute the above process into the rolling procedure offline calculation module to solve the reference rolling force P m =23943 kN, the rolling force and deformation of each pass are calculated according to the rolling force distribution coefficient, as shown in Table 3. Table 3 is a table of actual rolling force and actual deformation of each pass.

[0143] Table 3 Actual rolling force and actual deformation of each pass

[0144] path <![CDATA[P 1 ]]> <![CDATA[P 2 ]]> <![CDATA[P 3 ]]> <![CDATA[P 4 ]]> <![CDATA[P 5 ]]> Rolling force / kN 18676 20352 20112 21549 18676 Entrance thickness / mm 190 146.63 108.4 81.33 57 Export thickness / mm 146.63 108.4 81.33 57 48 Deformation / mm 43.37 38.23 27.07 24.33 9

[0145] Due to the maximum rolling force P 4 =21549kN≤0.8 max=32000kN; maximum pressing amount Δh 1 =43.37≤Δh max ≈45mm, both meet the judgment conditions, so the rolling force distribution coefficient does not need to be re-corrected. The calculation of the rough rolling schedule is completed.

[0146] The present application also provides a rolling mill control device. It should be noted that the rolling mill control device of the present application can be used to execute the rolling mill control method provided in the present application. The rolling mill control device provided in the present application is introduced below.

[0147] Figure 8 is a schematic diagram of a rolling mill control device provided according to an embodiment of the present application, such as Figure 8 As shown, the device includes: a first determination module 81, a second determination module 82, a third determination module 83, and a control module 84. The device is described in detail below.

[0148] The first determination module 81 is used to determine the preset rolling force of multiple passes according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient; the second determination module 82 is connected to the above-mentioned first determination module 81, and is used to determine the preset deformation of multiple passes according to the preset rolling force and the material parameters of the rolling object; the third determination module 83 is connected to the above-mentioned second determination module 82, and is used to calculate the actual rolling force and actual deformation of multiple passes according to the sum of the preset deformation of the multiple passes and the total rolling deformation; the control module 84 is connected to the above-mentioned third determination module 83, and is used to control the rolling mill to perform the multiple passes rolling processing on the rolling object according to the actual rolling force and the actual deformation when the actual rolling force and the actual deformation of the multiple passes meet the preset requirements.

[0149] The rolling mill control device provided in the embodiment of the present application determines the preset rolling force of multiple passes according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient; determines the preset deformation of multiple passes according to the preset rolling force and the material parameters of the rolling object; and calculates the actual rolling force and actual deformation of each pass according to the principle that the preset deformation is equal to the actual deformation. The rolling force distribution coefficient is adjusted and optimized according to the determination results of the actual rolling force and the actual deformation, and finally the purpose of determining the rolling force and deformation is achieved, the difficulty of solving the rolling force distribution coefficient is effectively reduced, and the preset accuracy and efficiency of the rolling schedule are achieved, thereby improving the technical effect of the efficiency and accuracy of rolling control, thereby solving the problem that the difficulty of solving the rolling force distribution coefficient is low, which leads to low control efficiency and accuracy when the rolling schedule is controlled in the related technology.

[0150] The rolling mill control device includes a processor and a memory. The first determination module 81, the second determination module 82, the third determination module 83, the control module 84, etc. are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

[0151] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the kernel parameters are adjusted to solve the problem that when controlling the rolling schedule in the related technology, the load distribution of each pass is realized according to the rolling force proportional distribution coefficient. The solution of the rolling force distribution coefficient is difficult, resulting in low control efficiency and accuracy.

[0152] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0153] An embodiment of the present invention provides a computer-readable storage medium on which a program is stored. When the program is executed by a processor, the rolling mill control method is implemented.

[0154] An embodiment of the present invention provides a processor, which is used to run a program, wherein the rolling mill control method is executed when the program is run.

[0155] Fig. 9 is a schematic diagram of an electronic device provided according to an embodiment of the present application, such as Fig. 9 As shown, an embodiment of the present application provides an electronic device 90, which includes a processor, a memory, and a program stored in the memory and executable on the processor, and the processor implements the steps of any of the above methods when executing the program.

[0156] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0157] The present application also provides a computer program product, which, when executed on a rolling mill control device, is suitable for executing a program initialized with any of the above method steps.

[0158] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0159] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable mill control device to produce a machine, so that the instructions executed by the processor of the computer or other programmable mill control device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0160] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable mill control device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0161] These computer program instructions may also be loaded onto a computer or other programmable mill control device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0162] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0163] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0164] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0165] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0166] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0167] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A rolling mill control method, It is characterized in that include: Determining preset rolling forces for a plurality of passes according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient; Determining preset deformation amounts for multiple passes according to the preset rolling force and material parameters of the rolling object; Calculating the actual rolling force and actual deformation of the multiple passes according to the sum of the preset deformation of the multiple passes and the total rolling deformation; When the actual rolling force and the actual deformation of the multiple passes meet the preset requirements, the rolling mill is controlled to perform the multiple passes of rolling processing on the rolling object according to the actual rolling force and the actual deformation; Wherein, before determining the preset rolling forces of multiple passes according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient, the method further includes: Determining the limit reduction of the rolling mill according to the maximum bite angle and roller radius of the rolling mill; Determining the total rolling passes according to the limit reduction, the steel biting safety factor and the total rolling deformation; Determining rolling force distribution coefficients of multiple passes according to a preset initial rolling force distribution coefficient and a rolling force correction coefficient; Determining a preset rolling force for each pass according to the rolling force distribution coefficient and a preset reference rolling force; Determining the preset deformation amounts of multiple passes according to the preset rolling force and the material parameters of the rolling object includes: Determine the deformation resistance formula and the friction influence coefficient formula of the material according to the material of the rolling object, wherein the deformation resistance formula and the friction influence coefficient formula are both calculated by the deformation amount of the corresponding pass; According to the preset rolling force, rolling mill parameters, and rolling force calculation model, determine the functional relationship between the preset rolling force and multiple variables, wherein the rolling force calculation model includes the deformation resistance formula and the friction force influence coefficient formula, and the multiple variables include the preset deformation amount corresponding to the preset rolling force, and the iterative variables of each pass; Determining a functional relationship between the iteration variable and the preset rolling force and the preset deformation; The functional relationship of the preset rolling force is brought into the functional relationship of the iteration variable to perform iteration until the iteration stop condition is met, and the preset deformation amount of each pass is determined.

2. The method according to claim 1, It is characterized in that According to the functional relationship of the iteration variable, the functional relationship of the preset rolling force is brought into iterative operation until the iteration stop condition is satisfied, and the preset deformation amount of each pass is determined, including: Determine the initial values ​​of the iteration variables for the first pass; According to the initial value, the preset rolling force of the first pass is brought into the functional relationship of the rolling force to calculate the preset deformation amount; Substituting the calculated preset deformation into the functional relationship of the iteration variable to determine the calculated value of the iteration variable; Determining whether an iteration stop condition is satisfied according to the initial value and the calculated value of the iteration variable; When the initial value and the calculated value satisfy the iteration stop condition, the calculated preset deformation amount is used as the preset deformation amount of the first pass, and the preset deformation amount of the next pass is calculated; When the initial value and the calculated value do not satisfy the iteration stop condition, the calculated value of the iteration variable is used as the initial value, and the preset deformation amount and the calculated value of the iteration variable are iteratively calculated until the initial value and the calculated value of the iteration variable satisfy the iteration stop condition.

3. The method according to claim 1, It is characterized in that Calculating the actual rolling force and the actual deformation of the multiple passes according to the sum of the preset deformation of the multiple passes and the total rolling deformation includes: Determine a preset total deformation amount according to the preset deformation amounts of multiple passes; According to the principle that the total rolling deformation is equal to the preset total deformation, the expression of the preset total deformation is solved to determine the actual reference rolling force; According to the actual reference rolling force, the actual rolling force and the actual deformation are determined.

4. The method according to claim 1, It is characterized in that The method further comprises: When the actual rolling force and / or actual deformation of multiple passes do not meet the preset requirements, adjusting the rolling force distribution coefficient; According to the adjusted rolling force distribution coefficient, the actual rolling force and the actual deformation of the multiple passes are re-determined until the actual rolling force and the actual deformation both meet the preset requirements.

5. The method according to claim 4, It is characterized in that When the actual rolling force and / or actual deformation of multiple passes do not meet the preset requirements, adjusting the rolling force distribution coefficient includes: Determining whether the actual rolling force meets a first requirement of the rolling work of the rolling mill, wherein the first requirement is that the actual rolling force does not exceed a safety value of a maximum design rolling force of the rolling mill; and / or, Determining whether the actual deformation amount meets a second requirement of the rolling mill, wherein the second requirement is that the actual deformation amount does not exceed a limit reduction amount; The preset requirement includes the first requirement and / or the second requirement.

6. A rolling mill control device, It is characterized in that include: A first determination module is used to determine the preset rolling forces of multiple passes according to the total rolling deformation, the total rolling passes, and the rolling force distribution coefficient; A second determination module, used to determine a preset deformation amount of a plurality of passes according to the preset rolling force and material parameters of the rolling object; A third determination module is used to calculate the actual rolling force and actual deformation of the multiple passes according to the sum of the preset deformation of the multiple passes and the total rolling deformation; A control module, configured to control the rolling mill to perform the rolling process on the rolling object in the plurality of passes according to the actual rolling force and the actual deformation in the plurality of passes when both the actual rolling force and the actual deformation in the plurality of passes meet preset requirements; Wherein, before the first determining module, the device further includes: Determining the limit reduction of the rolling mill according to the maximum bite angle and roller radius of the rolling mill; Determining the total rolling passes according to the limit reduction, the steel biting safety factor and the total rolling deformation; Determining rolling force distribution coefficients of multiple passes according to a preset initial rolling force distribution coefficient and a rolling force correction coefficient; Determining a preset rolling force for each pass according to the rolling force distribution coefficient and a preset reference rolling force; The second determining module comprises: Determine the deformation resistance formula and the friction influence coefficient formula of the material according to the material of the rolling object, wherein the deformation resistance formula and the friction influence coefficient formula are both calculated by the deformation amount of the corresponding pass; According to the preset rolling force, rolling mill parameters, and rolling force calculation model, determine the functional relationship between the preset rolling force and multiple variables, wherein the rolling force calculation model includes the deformation resistance formula and the friction force influence coefficient formula, and the multiple variables include the preset deformation amount corresponding to the preset rolling force, and the iterative variables of each pass; Determining a functional relationship between the iteration variable and the preset rolling force and the preset deformation; The functional relationship of the preset rolling force is brought into the functional relationship of the iteration variable to perform iteration until the iteration stop condition is met, and the preset deformation amount of each pass is determined.

7. A computer-readable storage medium, It is characterized in that The storage medium is used to store a program, wherein the program executes the rolling mill control method according to any one of claims 1 to 5.

8. An electronic device, It is characterized in that It comprises one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the rolling mill control method described in any one of claims 1 to 5.

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