Simulation method and device for straightening process of continuous casting billet

Abstract

The invention discloses a continuous casting billet straightening process simulation method and device, and relates to the technical field of metallurgy, and the method comprises the steps: building a simulation model of a target continuous casting billet; performing simulation operation of first straightening on the model based on constraint conditions to obtain a first simulation result; extracting a target continuous casting billet temperature field of the simulation model in the first straightening process from the first simulation result; and updating the constraint condition based on the target continuous casting billet temperature field, and performing simulation operation of secondary straightening on the simulation model through the updated constraint condition to obtain a second simulation result so as to determine whether the second simulation result meets a preset straightening condition or not. Therefore, the factor of the environment temperature in the straightening process is considered in the straightening process, so that the simulation process can better simulate the actual straightening process, the simulation accuracy is improved, and a basis can be better provided for the setting mode of each device of the straightening machine in the actual straightening process.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a continuous casting billet straightening process simulation method and device. Background Art

[0002] Straightening is the correction of shape defects of metal plastic processing products and is one of the important finishing processes. Rolled materials often produce various shape defects during the rolling process or in the subsequent cooling and transportation process, such as bending of bars, profiles and pipes, bending, waves, and bends of plates and strips. Through various straightening processes, defects such as bending can be eliminated under the action of external forces, so that the products can reach a qualified state. The straightening process is simply a process of applying external torque to the super-large steel continuous casting billet coming out of the fan-shaped segment, so that the billet undergoes plastic deformation and changes from a bent state to a straight state.

[0003] Continuously cast billets are products obtained by casting molten steel from a steelmaking furnace through a continuous casting machine. Ultra-large steel continuous casting billets are a type of continuous casting billet. Existing studies on the straightening process of ultra-large steel continuous casting billets (such as ultra-large H-shaped steel continuous casting billets) mainly include: using closely spaced straightening rollers, and at the same time dividing the 2500mm H-shaped steel continuous casting billet into 10 layers along the length direction, setting a specific heat transfer coefficient for each layer, simulating the temperature field according to the time interval, and the billet enters the straightening section through the friction between the rollers and the billet to complete the straightening work, while also considering the coupling of the temperature field. However, the straightening simulation process of this method cannot simulate the real scene well, resulting in low simulation accuracy, which affects the accuracy of subsequent analysis based on the simulation results. Summary of the invention

[0004] The embodiment of the present invention provides a method for simulating a straightening process of a continuous casting slab, which takes into account the factor of the ambient temperature during the straightening process, so that the simulation process can better simulate the actual straightening process and improve the simulation accuracy.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a method for simulating a continuous casting billet straightening process, comprising: constructing a simulation model of a target continuous casting billet; performing a first straightening simulation operation on the model based on constraints to obtain a first simulation result; extracting a target continuous casting billet temperature field of the simulation model during the first straightening process from the first simulation result; updating the constraints based on the target continuous casting billet temperature field, performing a second straightening simulation operation on the simulation model using the updated constraints to obtain a second simulation result, so as to determine whether the second simulation result meets the preset straightening conditions.

[0007] Optionally, the constraints include the initial ambient temperature, the length of the straightening section of the target continuous casting billet, the cross-sectional size of the target continuous casting billet, the arc radius of the target continuous casting billet, the straightening point of the target continuous casting billet, the target position of the support roller of the straightening machine, and the initial position and target position of the straightening roller of the straightening machine.

[0008] Optionally, the initial ambient temperature is determined by: determining the time and cooling method of passing through the crystallizer zone, the foot roller zone and the secondary cooling zone; determining the initial ambient temperature based on the time and cooling method of passing through the crystallizer zone, the foot roller zone and the secondary cooling zone.

[0009] Optionally, determining the initial temperature based on the time and cooling method passing through the crystallizer zone, the foot roll zone, and the secondary cooling zone includes: determining the internal heat flux density, the passing time and the cooling method in the crystallizer zone as the first parameter; determining the cooling method, the heat transfer coefficient and the passing time of the interior, the outer arc surface and the side of the target continuous casting billet in the foot roll zone as the second parameter; determining the cooling method, the heat transfer coefficient and the passing time of the interior, the outer arc surface and the side of the target continuous casting billet in the secondary cooling zone as the third parameter; and obtaining the initial temperature based on the first parameter, the second parameter, the third parameter and the target finite element simulation software.

[0010] Optionally, the target position of the straightening roller of the straightening machine is determined by: acquiring target parameters, the target parameters including the straightening curve length and the continuous casting billet radius; and determining the target position of the straightening roller of the straightening machine according to the target parameters and the continuous straightening curve equation.

[0011] Optionally, performing a first straightening simulation operation on the model based on constraint conditions to obtain a first simulation result includes: simultaneously moving the straightening rollers of the straightening machine from their respective corresponding initial positions along the normal direction of the straightening curve of the straightening point to the target positions corresponding to the support rollers and the straightening rollers of the straightening machine.

[0012] Optionally, updating the constraint conditions based on the target continuous casting billet temperature field, and performing a second straightening simulation operation on the simulation model through the updated constraint conditions to obtain a second simulation result includes: extracting motion-related parameters of the simulation model during the first straightening process from the first simulation result, the motion-related parameters including the pulling speed of the target continuous casting billet, the rotational speed of each straightening roller in the straightening machine, and the friction coefficient between each straightening roller and the target continuous casting billet; performing a thermal-mechanical coupling straightening simulation operation on the simulation model according to the motion-related parameters, the updated constraint conditions and the target finite element simulation software to obtain the second simulation result.

[0013] In a second aspect, the present invention provides a simulation device for a continuous casting billet straightening process, comprising: a simulation module construction module, suitable for constructing a simulation model of a target continuous casting billet; a first straightening simulation module, suitable for performing a first straightening simulation operation on the model based on constraints to obtain a first simulation result; a target continuous casting billet temperature determination module, suitable for extracting from the first simulation result the target continuous casting billet temperature field of the simulation model during the first straightening process; a second straightening simulation module, suitable for updating the constraints based on the target continuous casting billet temperature field, performing a second straightening simulation operation on the simulation model through the updated constraints to obtain a second simulation result, so as to determine whether the second simulation result meets the preset straightening conditions.

[0014] Optionally, the constraints include the initial ambient temperature, the length of the straightening section of the target continuous casting billet, the cross-sectional size of the target continuous casting billet, the arc radius of the target continuous casting billet, the straightening point of the target continuous casting billet, the target position of the support roller of the straightening machine, and the initial position and target position of the straightening roller of the straightening machine.

[0015] Optionally, the initial ambient temperature is determined by: determining the time and cooling method of passing through the crystallizer zone, the foot roller zone and the secondary cooling zone; determining the initial ambient temperature based on the time and cooling method of passing through the crystallizer zone, the foot roller zone and the secondary cooling zone.

[0016] Optionally, determining the initial temperature based on the time and cooling method passing through the crystallizer zone, the foot roll zone, and the secondary cooling zone includes: determining the internal heat flux density, the passing time and the cooling method in the crystallizer zone as the first parameter; determining the cooling method, the heat transfer coefficient and the passing time of the interior, the outer arc surface and the side of the target continuous casting billet in the foot roll zone as the second parameter; determining the cooling method, the heat transfer coefficient and the passing time of the interior, the outer arc surface and the side of the target continuous casting billet in the secondary cooling zone as the third parameter; and obtaining the initial temperature based on the first parameter, the second parameter, the third parameter and the target finite element simulation software.

[0017] Optionally, the target position of the straightening roller of the straightening machine is determined by: acquiring target parameters, the target parameters including the straightening curve length and the continuous casting billet radius; and determining the target position of the straightening roller of the straightening machine according to the target parameters and the continuous straightening curve equation.

[0018] Optionally, the first straightening simulation module includes: a first straightening simulation sub-module, suitable for simultaneously moving the straightening rollers of the straightening machine from their respective corresponding initial positions along the normal direction of the straightening curve of the straightening point to their respective corresponding target positions.

[0019] Optionally, the second straightening simulation module includes: a motion-related parameter determination module, suitable for extracting the motion-related parameters of the simulation model during the first straightening process from the first simulation result, the motion-related parameters including the pulling speed of the target continuous casting billet, the rotational speed of each straightening roller in the straightening machine, and the friction coefficient between each straightening roller and the target continuous casting billet; a thermal coupling module, suitable for performing thermal coupling straightening simulation operations on the simulation model according to the motion-related parameters, the updated constraints and the target finite element simulation software to obtain a second simulation result.

[0020] In a third aspect, the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the above method are implemented when the processor executes the program.

[0021] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method when executed by a processor.

[0022] In an embodiment of the present invention, a simulation method for the straightening process of a continuous casting billet is provided, which simulates the actual scene for modeling, performs a first straightening simulation operation to obtain the ambient temperature during the straightening process, updates the ambient temperature in the constraint condition to the ambient temperature during the straightening process, performs a second straightening simulation operation to obtain a simulation result, and compares the simulation result with a preset strain threshold to determine whether the simulation result meets the preset straightening condition. If so, the parameters set in the straightening simulation operation process can be applied to the actual straightening process. This scheme takes into account the factor of the ambient temperature during the straightening process, and can better simulate the influence of the ambient temperature on the stress of each node of the continuous casting billet during the actual straightening process, so that the simulation process can better simulate the actual straightening process, improve the simulation accuracy, and better provide a basis for the setting method of each device of the straightening machine during the actual straightening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0024] Figure 1 A flow chart of a continuous casting slab straightening process simulation method provided in one embodiment of the present invention;

[0025] Figure 2 A schematic diagram of a three-dimensional simulation model of a continuous casting billet in one embodiment of the present invention;

[0026] Figure 3 A schematic diagram of an initial ambient temperature field corresponding to a continuous casting billet in one embodiment of the present invention;

[0027] Figure 4 A schematic diagram of a model of a continuous casting billet after the first straightening simulation operation in one embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of a target continuous casting billet temperature field during the first straightening process of the continuous casting billet in one embodiment of the present invention;

[0029] Figure 6 A flowchart of step 400 in one embodiment of the present invention;

[0030] Figure 7 A schematic diagram of a flow chart for determining whether a second simulation result satisfies a preset straightening condition in an embodiment of the present invention;

[0031] Figure 8 A schematic diagram of a continuous casting slab straightening process simulation device provided in an embodiment of the present invention;

[0032] Fig. 9 A schematic diagram of an electronic device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0034] In the description of this specification, the terms "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps therein is not limited and can be appropriately adjusted as needed.

[0035] Before explaining the technical solution of the present invention in detail, it should be noted that the acquisition, storage, use, and processing of data in the technical solution of the present invention are in compliance with the relevant provisions of national laws and regulations.

[0036] In order to facilitate understanding of the technical solution provided by this application, the relevant contents of the technical solution of this application are first explained below.

[0037] The present invention can be applied to the simulation calculation of the straightening process of continuous casting billets, especially to the simulation calculation of the straightening process of super-large steel continuous casting billets. The simulation calculation of the straightening process of continuous casting billets of the present invention can be understood as the finite element calculation of the direct process of continuous casting billets.

[0038] In order to solve the technical problem of low simulation accuracy of the continuous casting billet straightening simulation calculation method in the existing technology, an embodiment of the present invention provides a simulation scheme for the continuous casting billet straightening process. The present invention takes into account the factor of ambient temperature during the straightening process, and can better simulate the influence of ambient temperature on the stress of each node of the continuous casting billet during the actual straightening process, so that the simulation process can better simulate the actual straightening process, improve the simulation accuracy, and provide a better basis for the setting method of each equipment of the straightening machine in the actual straightening process.

[0039] like Figure 1 FIG. 1 is a flow chart of a method for simulating a continuous casting slab straightening process provided by an embodiment of the present invention. The method may include the following steps:

[0040] Step 100: construct a simulation model of the target continuous casting billet.

[0041] Step 200: Perform a first straightening simulation operation on the model based on the constraint conditions to obtain a first simulation result.

[0042] The constraints here include the initial ambient temperature, the straightening section length of the target continuous casting billet, the cross-sectional size of the target continuous casting billet, the arc radius of the target continuous casting billet, the straightening point of the target continuous casting billet, the target position of the support roller of the straightening machine, and the initial position and target position of the straightening roller of the straightening machine. Among them, the straightening section length of the target continuous casting billet is set according to the actual application scenario, which is not limited here. For example, the straightening section length is 5 meters. The straightening point of the target continuous casting billet is determined based on the arc radius and the continuous straightening curve, which will be described below. The initial position of the straightening roller of the straightening machine is preset, and the present invention does not limit this, as long as it satisfies the requirement of not contacting the continuous casting billet during the process of moving the continuous casting billet to the straightening machine before straightening.

[0043] In one embodiment, the initial ambient temperature can be understood as the temperature of the continuous casting billet before entering the straightening machine, and the initial ambient temperature is determined by: firstly determining the time and cooling method of passing through the crystallizer area, the foot roller area and the secondary cooling area, and then determining the initial temperature according to the time and cooling method of passing through the crystallizer area, the foot roller area and the secondary cooling area. Specifically:

[0044] First, the internal heat flux density, transit time and cooling method in the crystallizer zone are determined as the first parameter, and then the cooling method, heat transfer coefficient and transit time of the interior, outer arc surface and side of the target continuous casting billet in the foot roll zone are determined as the second parameter, and then the cooling method, heat transfer coefficient and transit time of the interior, outer arc surface and side of the target continuous casting billet in the second cooling zone are determined as the third parameter. Finally, the initial temperature is obtained according to the first parameter, the second parameter, the third parameter and the target finite element simulation software. Further, the first parameter, the second parameter and the third parameter are substituted into the target finite element simulation software to obtain the initial temperature. An example of the initial temperature is given below: the temperature before entering the straightening: about 750 degrees at the flange, about 945 degrees at the center of the web, and the main part is greater than 900 degrees, avoiding the low-temperature brittle area of ​​the material.

[0045] The calculation formula of the internal heat flux density in the crystallizer area is:

[0046]

[0047] Where q represents the internal heat flux density of the crystallizer zone, a represents an empirical constant, which is generally taken as 2688, β represents the temperature difference between the inlet and outlet of the cooling water, which is determined according to the specific crystallizer structure, water flow rate, and other factors, L represents the distance from any point on the continuous casting billet below the meniscus of the crystallizer to the meniscus (in meters), and v represents the continuous casting billet drawing speed (in meters / minute).

[0048] In some embodiments, the target position of the straightening roller of the straightening machine is determined by the following method: first, the target parameters are obtained, and the target parameters include the length of the straightening curve. Then, the target position of the straightening roller of the straightening machine is determined according to the target parameters and the continuous straightening curve equation. Further, the target parameters are input into the continuous straightening curve equation to obtain the target position of the straightening roller of the straightening machine. Among them, the continuous straightening curve equation is an existing technology, and the calculation process of inputting the target parameters into the continuous straightening curve equation to obtain the target position of the straightening roller is an existing technology, which will not be repeated here.

[0049] The continuous straightening curve equation is:

[0050]

[0051]

[0052] In the formula, y represents the ordinate of the straightening point, which can be understood as the contact point between the continuous casting billet and the straightening roller, x represents the abscissa of the straightening point, R represents the coefficient to be determined, S0 represents the length of the straightening curve, which is the same as the length of the straightening section, and R0 represents the radius of the continuous casting billet, which is the radius of the continuous casting machine, for example, 12 meters.

[0053] Step 300: extracting the target continuous casting billet temperature field of the simulation model during the first straightening process from the first simulation result.

[0054] Step 400: updating the constraint conditions based on the target continuous casting billet temperature field, performing a second straightening simulation operation on the simulation model using the updated constraint conditions to obtain a second simulation result, so as to determine whether the second simulation result meets the preset straightening condition.

[0055] The continuous casting slab straightening process simulation method provided by the embodiment of the present invention simulates the actual scene for modeling, performs the first straightening simulation operation to obtain the ambient temperature during the straightening process, updates the ambient temperature in the constraint condition to the ambient temperature during the straightening process, performs the second straightening simulation operation to obtain the simulation result, and compares the simulation result of the second straightening simulation operation with the preset strain threshold to determine whether the simulation result meets the preset straightening condition. If so, the parameters set in the straightening simulation operation process can be applied to the actual straightening process. This scheme takes into account the factor of ambient temperature during the straightening process, and can better simulate the influence of ambient temperature on the stress of each node of the continuous casting slab during the actual straightening process, so that the simulation process can better simulate the actual straightening process, improve the simulation accuracy, and better provide a basis for the setting method of each device of the straightening machine during the actual straightening process.

[0056] Below Figure 1 The simulation method of the continuous casting slab straightening process is described in detail.

[0057] In some embodiments, the above step 100 may specifically include: constructing a three-dimensional simulation model of the target continuous casting billet, and dividing the three-dimensional simulation model into multiple regions, each region can be understood as a node of the target continuous casting billet.

[0058] The following is an example of a 3D simulation model of a continuous casting billet. Figure 2 As shown, Figure 2 The simulation model shown is a symmetrical model, which is half of the original model. Figure 2 R11 in the figure is a continuous casting billet. Further, for example, an H-beam continuous casting billet, the continuous casting billet is a circular arc.

[0059] Based on the constraints given above, we further Figure 2 The figure marks in the given model example are explained: R1-1, R1-2, R2-1, R2-2, R3-1, R3-2, R9, R10-1 and R10-2 are the support rollers of the straightening machine, the continuous casting segment corresponding to R5-R8 is the straightening section, and R5 corresponds to the starting point of the straightening section, R4-1, R4-2, R5-1, R5-2, R6-1, R6-2, R7-1, R7-2, R8-1 and R8-2 are straightening rollers.

[0060] It is worth noting that when the continuous casting billet is initially fed into the straightening machine, R5-2, R6-2, R7-2, R8-2, and R10-2 are in a lifted state so that the continuous casting billet can be smoothly fed into the straightening machine. Before the continuous casting billet is fed into the straightening machine and fixed in position for straightening, R5-2, R6-2, R7-2, R8-2, and R10-2 are set to a pressed state so that the continuous casting billet can be straightened subsequently.

[0061] In addition, the initial ambient temperature can be the initial ambient temperature field, also in the form of Figure 2 Taking the continuous casting billet shown as an example, Figure 2 The initial ambient temperature field corresponding to the continuous casting billet shown can be shown as Figure 3 shown.

[0062] In some embodiments, the above step 200 may specifically include: based on the constraint conditions, performing a first straightening simulation operation on the model by using target finite element simulation software to obtain a first simulation result.

[0063] Furthermore, the first simulation result obtained by performing the first straightening simulation operation on the model in the target finite element simulation software includes: moving the straightening rollers of the straightening machine from their respective corresponding initial positions along the normal direction of the straightening curve of the straightening point to the respective corresponding target positions of the support rollers and the straightening rollers of the straightening machine. The normal direction of the straightening curve of the straightening point here can be understood as the perpendicular direction of the tangent of the straightening curve of the straightening point. Figure 2 Taking the continuous casting billet shown in the figure as an example, the schematic diagram of the model of the continuous casting billet after the first straightening simulation operation is as follows Figure 4 shown.

[0064] The above step 300 may specifically include: extracting the target continuous casting billet temperature field of the simulation model during the first straightening process from the first simulation result, wherein the temperature field reflects the change in the surface temperature of the continuous casting billet during the straightening process. Figure 2 Taking the continuous casting billet shown in the figure as an example, the target continuous casting billet temperature field in the first straightening process of the continuous casting billet can be as follows: Figure 5 shown.

[0065] After obtaining the temperature of the continuous casting billet when it enters the straightening section, this condition is used as the temperature parameter of the continuous casting billet before straightening. On this basis, during the straightening process, the continuous casting billet is no longer cooled by spraying water on the surface, but only relies on air cooling when exposed to the air. At this time, there is convection heat transfer and thermal radiation between the billet surface and the air. The convection heat transfer coefficient and thermal radiation are added to the surface of the continuous casting billet to simulate the temperature field, that is, the second simulation operation is performed. Then in some embodiments, such as Figure 6 As shown, the above step 400 may specifically include:

[0066] Step 410: extracting motion-related parameters of the simulation model during the first straightening process from the first simulation result.

[0067] The motion-related parameters include the pulling speed of the target continuous casting billet, the rotation speed of each straightening roller in the straightening machine, and the friction coefficient between each straightening roller and the target continuous casting billet.

[0068] Step 420: Perform a simulation operation of thermal-mechanical coupling straightening on the simulation model according to the motion-related parameters and the updated constraint conditions to obtain a second simulation result.

[0069] Specifically, the motion-related parameters of the simulation model during the first straightening process are extracted from the first simulation result. Then, according to the motion-related parameters, the updated constraints and the target finite element simulation software, the simulation model is subjected to a simulation operation of thermal-mechanical coupling straightening to obtain a second simulation result. Furthermore, the motion-related parameters and the updated constraints are substituted into the target finite element simulation software to perform a simulation operation of thermal-mechanical coupling straightening on the simulation model to obtain a second simulation result.

[0070] In this way, during the straightening process, full consideration is given to the influence of the temperature of the continuous casting billet and the motion-related parameters during the movement of the continuous casting billet on the stress of each node on the surface of the continuous casting billet (the pulling speed of the continuous casting billet, the rotation speed of each straightening roller in the straightening machine, and the friction between each straightening roller and the target continuous casting billet), so that the straightening process is more in line with the actual industrial straightening process, and the simulation calculation is more in line with the actual straightening situation, thereby improving the accuracy of the simulation calculation of the straightening process. In this way, a better basis can be provided for the setting method of each equipment of the straightening machine in the actual straightening process.

[0071] The motion-related parameters include the pulling speed of the target continuous casting billet, the rotation speed of each straightening roller in the straightening machine, and the friction coefficient between each straightening roller and the target continuous casting billet. The friction coefficient between each straightening roller and the target continuous casting billet can be a preset value, which is determined according to the actual production situation, for example, the friction coefficient is 0.3. The calculation formula for the pulling speed of the continuous casting billet is:

[0072] v = wr

[0073] Where v is the pulling speed of the continuous casting billet, r is the diameter of the straightening roller, and w is the rotation speed of the straightening roller. When the pulling speed of the continuous casting billet is constant, the corresponding rotation speed of each straightening roller can be calculated.

[0074] The target finite element simulation software mentioned in the present invention can be selected according to the actual application scenario, and the present invention does not limit this. For example, the target finite element simulation software can be ANSYS software.

[0075] In some embodiments, the preset straightening condition may include a preset strain threshold and a preset straightening force threshold. Figure 7As shown, determining whether the second simulation result satisfies the preset straightening condition may specifically include:

[0076] Step 710: Determine the strain or stress of any node on the surface of the target continuous casting billet during the second simulation calculation and the straightening force of each straightening roller.

[0077] It should be noted that the strain and stress of each node on the surface of the continuous casting billet during the straightening process are the same. The target continuous casting billet surface can be the lower surface.

[0078] Step 720: Select the maximum strain or stress from any node strain or stress that has been determined.

[0079] Step 730: Compare the maximum strain or stress with a preset threshold to obtain a strain or stress comparison result.

[0080] The preset threshold may include a preset strain threshold or a preset stress threshold. Since the strain and stress of each node on the surface of the continuous casting billet during the straightening process are the same, only one of the stress and the strain needs to be compared.

[0081] If the preset threshold is a preset strain threshold, then the comparison result is a strain comparison result, and the strain comparison result includes satisfying the preset strain condition and not satisfying the preset strain condition. If the preset threshold is a preset stress threshold, then the comparison result is a stress comparison result, and the stress comparison result includes satisfying the preset stress condition and not satisfying the preset stress condition.

[0082] The following takes the preset threshold as the preset strain threshold and the strain comparison result including satisfying the preset strain condition and not satisfying the preset strain condition as an example to explain step 730:

[0083] Determine whether the maximum strain does not exceed the preset strain. If so, determine that the comparison result meets the preset strain condition. If not, it means that the maximum strain is greater than the preset strain. Then, the excessive strain may easily cause cracks in the continuous casting billet, resulting in damage to the continuous casting billet. In this case, the comparison result does not meet the preset strain condition.

[0084] The preset strain threshold may be pre-calculated based on actual data of the continuous casting billet and the straightening machine. For example, the preset strain threshold may be 1.87%. Of course, the present invention does not limit the size of the preset strain threshold, which may be set according to actual application scenarios. The above is only an example.

[0085] Step 740: Compare the maximum straightening force in each straightening roller with a preset straightening force threshold to obtain a straightening force comparison result.

[0086] The straightening force comparison result includes satisfying the preset straightening force condition and not satisfying the preset straightening force condition. Specifically, it is determined whether the maximum straightening force among the straightening forces does not exceed the preset straightening force. If so, the comparison result is determined to satisfy the preset straightening force condition. If not, it means that the maximum straightening force is greater than the preset straightening force. If the straightening force is too large, it is also easy to cause cracks in the continuous casting billet, resulting in damage to the continuous casting billet. In this case, the comparison result is not satisfying the preset straightening force condition.

[0087] The preset straightening force threshold can be set according to the actual application scenario, and the present invention does not impose any limitation on this.

[0088] Step 750: Determine whether the second simulation result meets the preset straightening condition according to the strain or stress comparison result and the straightening force comparison result.

[0089] Specifically: determine whether the strain or stress comparison result meets the preset strain condition. If not, directly determine that the second simulation result does not meet the preset straightening condition. If the preset strain condition is met, then continue to determine whether the straightening force comparison result meets the preset straightening force condition. If it is met, directly determine that the second simulation result meets the preset straightening condition. If not, then it can be determined that the second simulation result does not meet the preset straightening condition.

[0090] That is to say, only when the preset strain or stress condition and the preset straightening force condition are met at the same time, it is determined that the second simulation result meets the preset straightening condition. In this way, while ensuring the quality of the continuous casting billet after straightening, the accuracy of the simulation calculation of the straightening process can also be improved, thereby providing a reliable basis for the setting method of each device of the straightening machine in the actual straightening process.

[0091] Here are some examples of determining whether the second simulation result meets the preset straightening conditions:

[0092] 1) After the continuous casting billet is straightened, a node can be taken from the flange, R angle, inner and outer arc side outer surfaces of the web before straightening, and the node can be controlled to complete the entire straightening process. Through the stress and strain curve of the node, the stress and strain distribution state of the entire billet can be analyzed, and the extreme value points of stress and strain of the billet during the straightening process can also be seen. The extreme value should be within a certain numerical range. If it exceeds this range, the original design should be improved.

[0093] 2) A certain straightening roller can be selected to extract the change of the straightening force of the straightening roller during the whole straightening process. The straightening force can provide a design basis for the driving device of the straightening roller.

[0094] 3) To check the straightening effect of the billet after straightening, you can select nodes in an area on the outer surface of the upper and lower webs of the billet before straightening. The nodes in this area go through the entire straightening section. After straightening, extract the changes in the vertical coordinates of these nodes to analyze the straightening. At the same time, after straightening, the cross section of the billet will also change. According to the calculation results, the deformation of the cross section of the billet in the three directions of x, y, and z can be analyzed, which will lay a good foundation for the future rolling design of the billet.

[0095] The present invention also provides a continuous casting billet straightening process simulation device, as described in the following embodiments. Since the principle of the device to solve the problem is similar to the continuous casting billet straightening process simulation method, the implementation of the device can refer to the implementation of the continuous casting billet straightening process simulation, and the repeated parts will not be repeated.

[0096] Figure 8 Schematic diagram of a continuous casting slab straightening process simulation device provided in an embodiment of the present invention, the device comprising:

[0097] The simulation module construction module 10 is suitable for constructing a simulation model of a target continuous casting billet.

[0098] The first straightening simulation module 20 is adapted to perform a first straightening simulation operation on the model based on constraint conditions to obtain a first simulation result.

[0099] The target continuous casting billet temperature determination module 30 is adapted to extract the target continuous casting billet temperature field of the simulation model during the first straightening process from the first simulation result.

[0100] The second straightening simulation module 40 is suitable for updating the constraint conditions based on the target continuous casting billet temperature field, and performing a second straightening simulation operation on the simulation model through the updated constraint conditions to obtain a second simulation result to determine whether the second simulation result meets the preset straightening condition.

[0101] In some embodiments, the constraints include the initial ambient temperature, the straightening section of the target continuous casting billet, the cross-sectional size of the target continuous casting billet, the arc radius of the target continuous casting billet, the straightening point of the target continuous casting billet, the target position of the support roller of the straightening machine, and the initial position and target position of the straightening roller of the straightening machine.

[0102] In some embodiments, the initial ambient temperature in the constraint condition is determined by: determining the time and cooling method passing through the crystallizer zone, the foot roll zone and the secondary cooling zone; determining the initial temperature based on the time and cooling method passing through the crystallizer zone, the foot roll zone and the secondary cooling zone.

[0103] In some embodiments, determining the initial temperature based on the time and cooling method passing through the crystallizer zone, the foot roll zone, and the secondary cooling zone includes: determining the internal heat flux density, the passing time and the cooling method in the crystallizer zone as the first parameter; determining the cooling method, heat transfer coefficient and passing time of the interior, outer arc surface and side of the target continuous casting billet in the foot roll zone as the second parameter; determining the cooling method, heat transfer coefficient and passing time of the interior, outer arc surface and side of the target continuous casting billet in the secondary cooling zone as the third parameter; obtaining the initial temperature based on the first parameter, the second parameter, the third parameter and the target finite element simulation software.

[0104] In some embodiments, the initial position and target position of the straightening roller of the straightening machine are determined by: obtaining target parameters, which include the length of the straightening curve and the radius of the continuous casting billet; and determining the initial position and target position of the straightening roller of the straightening machine according to the target parameters and the continuous straightening curve equation.

[0105] In some embodiments, the first straightening simulation module 20 includes: a first straightening simulation sub-module, suitable for simultaneously moving the straightening rollers of the straightening machine from their respective corresponding initial positions along the normal direction of the straightening curve of the straightening point to the target positions corresponding to the support rollers and the straightening rollers of the straightening machine.

[0106] In some embodiments, the second straightening simulation module 40 includes: a motion-related parameter determination module, suitable for extracting the motion-related parameters of the simulation model during the first straightening process from the first simulation result, the motion-related parameters including the pulling speed of the target continuous casting billet, the rotational speed of each straightening roller in the straightening machine, and the friction coefficient between each straightening roller and the target continuous casting billet; a thermal coupling module, suitable for performing a thermal coupling straightening simulation operation on the simulation model according to the motion-related parameters and the updated constraints to obtain a second simulation result.

[0107] The device provided by the embodiment of the present invention simulates the actual scene for modeling, performs the first straightening simulation operation to obtain the ambient temperature during the straightening process, updates the ambient temperature in the constraint condition to the ambient temperature during the straightening process, performs the second straightening simulation operation to obtain the simulation result, and compares the simulation result with the preset strain threshold to determine whether the simulation result meets the preset straightening condition. If so, the parameters set in the straightening simulation operation process can be applied to the actual straightening process. This scheme takes into account the factor of ambient temperature during the straightening process, and can better simulate the influence of ambient temperature on the stress of each node of the continuous casting billet during the actual straightening process, so that the simulation process can better simulate the actual straightening process, improve the simulation accuracy, and better provide a basis for the setting method of each device of the straightening machine during the actual straightening process.

[0108] The embodiment of the present application also provides a specific implementation of an electronic device capable of implementing all steps in the continuous casting slab straightening process simulation method in the above embodiment, see Fig. 9 , electronic equipment specifically includes the following:

[0109] Processor (processor) 901, memory (memory) 902, communication interface (CommunicationsInterface) 903 and communication bus 904;

[0110] The processor 901, the memory 902, and the communication interface 903 communicate with each other via the communication bus 904; the communication interface 903 is used to realize information transmission between relevant devices such as the server-side device, the parameter acquisition device, and the user-side device.

[0111] The processor 901 is used to call the computer program in the memory 902. When the processor executes the computer program, all the steps in the continuous casting slab straightening process simulation method in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0112] Step 100: construct a simulation model of the target continuous casting billet.

[0113] Step 200: Perform a first straightening simulation operation on the model based on the constraint conditions to obtain a first simulation result.

[0114] Step 300: extracting the target continuous casting billet temperature field of the simulation model during the first straightening process from the first simulation result.

[0115] Step 400: updating the constraint conditions based on the target continuous casting billet temperature field, performing a second straightening simulation operation on the simulation model using the updated constraint conditions to obtain a second simulation result, so as to determine whether the second simulation result meets the preset straightening condition.

[0116] From the above description, it can be seen that the electronic device in the embodiment of the present application proposes a simulation method for the straightening process of the continuous casting billet, simulates the actual scene for modeling, performs the first straightening simulation operation to obtain the ambient temperature during the straightening process, updates the ambient temperature in the constraint condition to the ambient temperature during the straightening process, performs the second straightening simulation operation to obtain the simulation result, and compares the simulation result with the preset strain threshold to determine whether the simulation result meets the preset straightening condition. If so, the parameters set in the straightening simulation operation process can be applied to the actual straightening process. This scheme takes into account the factor of ambient temperature in the straightening process during the straightening process, and can better simulate the influence of ambient temperature on the stress of each node of the continuous casting billet during the actual straightening process, so that the simulation process can better simulate the actual straightening process, improve the simulation accuracy, and better provide a basis for the setting method of each device of the straightening machine during the actual straightening process.

[0117] The embodiment of the present application also provides a computer-readable storage medium capable of implementing all the steps in the continuous casting slab straightening process simulation method in the above embodiment. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps in the continuous casting slab straightening process simulation method in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0118] Step 100: construct a simulation model of the target continuous casting billet.

[0119] Step 200: Perform a first straightening simulation operation on the model based on the constraint conditions to obtain a first simulation result.

[0120] Step 300: extracting the target continuous casting billet temperature field of the simulation model during the first straightening process from the first simulation result.

[0121] Step 400: updating the constraint conditions based on the target continuous casting billet temperature field, performing a second straightening simulation operation on the simulation model using the updated constraint conditions to obtain a second simulation result, so as to determine whether the second simulation result meets the preset straightening condition.

[0122] From the above description, it can be seen that the computer-readable storage medium in the embodiment of the present application proposes a simulation method for the straightening process of the continuous casting billet, simulates the actual scene for modeling, performs the first straightening simulation operation to obtain the ambient temperature during the straightening process, updates the ambient temperature in the constraint condition to the ambient temperature during the straightening process, performs the second straightening simulation operation to obtain the simulation result, and compares the simulation result with the preset strain threshold to determine whether the simulation result meets the preset straightening condition. If so, the parameters set in the straightening simulation operation process can be applied to the actual straightening process. This scheme takes into account the factor of ambient temperature in the straightening process during the straightening process, and can better simulate the influence of ambient temperature on the stress of each node of the continuous casting billet during the actual straightening process, so that the simulation process can better simulate the actual straightening process, improve the simulation accuracy, and better provide a basis for the setting method of each device of the straightening machine in the actual straightening process.

[0123] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0124] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0125] Although the present application provides method operation steps such as embodiments or flow charts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the device or user-end product in practice is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0126] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take 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.) containing computer-usable program code.

[0127] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of 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 data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing 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.

[0128] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising 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.

[0129] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0130] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A continuous casting slab straightening process simulation method, characterized in that: include: Construct a simulation model of the target continuous casting billet; Performing a first straightening simulation operation on the model based on the constraint conditions to obtain a first simulation result; Extracting the target continuous casting billet temperature field of the simulation model during the first straightening process from the first simulation result; The constraint condition is updated based on the target continuous casting billet temperature field, and a second straightening simulation operation is performed on the simulation model using the updated constraint condition to obtain a second simulation result, so as to determine whether the second simulation result meets the preset straightening condition.

2. The method according to claim 1, characterized in that The constraints include the initial ambient temperature, the straightening section length of the target continuous casting billet, the cross-sectional size of the target continuous casting billet, the arc radius of the target continuous casting billet, the straightening point of the target continuous casting billet, the target position of the support roller of the straightening machine, and the initial position and target position of the straightening roller of the straightening machine.

3. The method according to claim 2, characterized in that The initial ambient temperature is determined by: Determine the time and cooling method in the crystallizer area, foot roll area and secondary cooling area; The initial ambient temperature is determined according to the time and cooling method in the crystallizer zone, the foot roll zone, and the secondary cooling zone.

4. The method according to claim 3, characterized in that Determining the initial temperature according to the time and cooling method in the crystallizer zone, the foot roll zone, and the secondary cooling zone includes: Determining the internal heat flux density, the transit time and the cooling method in the crystallizer zone as first parameters; Determine the cooling mode, heat transfer coefficient and transit time of the interior, outer arc surface and side surface of the target continuous casting billet in the foot roll area as the second parameter; Determine the cooling mode, heat transfer coefficient and passing time of the interior, outer arc surface and side surface of the target continuous casting billet in the secondary cooling zone as the third parameter; The initial temperature is obtained according to the first parameter, the second parameter, the third parameter and target finite element simulation software.

5. The method according to claim 2, characterized in that The target position of the straightening roller of the straightening machine is determined by: Obtaining target parameters, wherein the target parameters include a straightening curve length and a continuous casting billet radius; The target position of the straightening roller of the straightening machine is determined according to the target parameter and the continuous straightening curve equation.

6. The method according to claim 2, characterized in that The first simulation result obtained by performing a simulation operation of the first straightening on the model based on the constraint condition includes: The straightening rollers of the straightening machine are simultaneously moved from their respective corresponding initial positions along the normal direction of the straightening curve of the straightening point to their respective corresponding target positions.

7. The method according to claim 1, characterized in that The updating of the constraint condition based on the target continuous casting billet temperature field, and performing a second straightening simulation operation on the simulation model by using the updated constraint condition to obtain a second simulation result comprises: Extracting motion-related parameters of the simulation model during the first straightening process from the first simulation result, the motion-related parameters including the pulling speed of the target continuous casting billet, the rotation speed of each straightening roller in the straightening machine, and the friction coefficient between each straightening roller and the target continuous casting billet; A second simulation result is obtained by performing a simulation operation of thermal-mechanical coupling straightening on the simulation model according to the motion-related parameters, the updated constraint conditions and the target finite element simulation software.

8. A continuous casting slab straightening process simulation device, characterized in that: include: A simulation module building module, suitable for building a simulation model of a target continuous casting billet; A first straightening simulation module, adapted to perform a first straightening simulation operation on the model based on constraint conditions to obtain a first simulation result; A target continuous casting billet temperature determination module, adapted to extract a target continuous casting billet temperature field of the simulation model during the first straightening process from the first simulation result; The second straightening simulation module is suitable for updating the constraint conditions based on the target continuous casting billet temperature field, and performing a second straightening simulation operation on the simulation model through the updated constraint conditions to obtain a second simulation result to determine whether the second simulation result meets the preset straightening condition.

9. The device according to claim 8, characterized in that The constraints include the initial ambient temperature, the straightening section length of the target continuous casting billet, the cross-sectional size of the target continuous casting billet, the arc radius of the target continuous casting billet, the straightening point of the target continuous casting billet, the target position of the support roller of the straightening machine, and the initial position and target position of the straightening roller of the straightening machine.

10. The device according to claim 9, characterized in that The initial ambient temperature is determined by: Determine the time and cooling method in the crystallizer area, foot roll area and secondary cooling area; The initial ambient temperature is determined according to the time and cooling method in the crystallizer zone, the foot roll zone, and the secondary cooling zone.

11. The device according to claim 10, characterized in that Determining the initial temperature according to the time and cooling method in the crystallizer zone, the foot roll zone, and the secondary cooling zone includes: Determining the internal heat flux density, the transit time and the cooling method in the crystallizer zone as first parameters; Determine the cooling mode, heat transfer coefficient and transit time of the interior, outer arc surface and side surface of the target continuous casting billet in the foot roll area as the second parameter; Determine the cooling mode, heat transfer coefficient and passing time of the interior, outer arc surface and side surface of the target continuous casting billet in the secondary cooling zone as the third parameter; The initial temperature is obtained according to the first parameter, the second parameter, the third parameter and target finite element simulation software.

12. The device according to claim 9, characterized in that The target position of the straightening roller of the straightening machine is determined by: Obtaining target parameters, wherein the target parameters include a straightening curve length and a continuous casting billet radius; The target position of the straightening roller of the straightening machine is determined according to the target parameter and the continuous straightening curve equation.

13. The device according to claim 9, characterized in that The first straightening simulation module comprises: The first straightening simulation submodule is adapted to simultaneously move the straightening rollers of the straightening machine from their respective corresponding initial positions along the normal direction of the straightening curve of the straightening point to their respective corresponding target positions.

14. The device according to claim 8, characterized in that The second straightening simulation module comprises: a motion-related parameter determination module, adapted to extract motion-related parameters of the simulation model during the first straightening process from the first simulation result, wherein the motion-related parameters include a pulling speed of the target continuous casting billet, a rotation speed of each straightening roller in a straightening machine, and a friction coefficient between each straightening roller and the target continuous casting billet; The thermomechanical coupling module is suitable for performing a simulation operation of thermomechanical coupling straightening on the simulation model according to the motion-related parameters, the updated constraint conditions and the target finite element simulation software to obtain a second simulation result.

15. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the continuous casting slab straightening process simulation method according to any one of claims 1 to 7 are implemented.

16. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for simulating a continuous casting slab straightening process according to any one of claims 1 to 7 are implemented.

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