A method, device and equipment for setting the roll gap during the thinning process of thick plate rolling

Abstract

The present invention discloses a method, device and equipment for setting the roll gap during the thinning process of thick plate rolling, which relates to the field of metal rolling technology and is used to solve the problem of low roll gap setting accuracy during the thinning process of thick plate rolling in the existing technology. The method comprises: determining the parameters of the rolled piece, the rolling process parameters and the rolling mill parameters according to the process specification data of the thinning process of thick plate rolling; calculating the parameters of the rolling zone and the deformation zone during the thinning process of the steel plate according to the determined parameters; calculating the total power functional and the rolling force of the deformation zone at any time according to the deformation characteristics of the rolled piece; and obtaining the set value of the roll gap during the thinning process according to the rolling mill stiffness, the theoretical value of the roll gap and the rolling force of the deformation zone at any time. The present invention is mainly aimed at controlling the roll gap distance during the thinning process of thick plate rolling. The specific calculation method can accurately set the rolling force and the roll gap, thereby improving the accuracy of the roll gap setting.

Description

Technical Field

[0001] The present invention relates to the technical field of metal rolling, and in particular to a method, device and equipment for setting a roll gap in a thick plate rolling thinning process. Background Art

[0002] Plate rolling, a crucial step in steel production, involves gradually reducing the thickness of the billet through multiple rolling passes to achieve the desired finished thickness. Finished products include medium plate, extra-thick plate, and extra-wide plate, and are widely used in construction, machinery manufacturing, shipbuilding, energy equipment, and bridge engineering. As a key component of thick plate production, medium plate often has irregular shapes at the sides and ends of the rolled piece during production. These irregular shapes require trimming to achieve a flat finished piece. This results in material loss.

[0003] MAS (Mizushima Automatic Plan View Pattern Control System) rolling for medium and heavy plate uses thinning rolling technology to improve the rectangularity of the steel plate and increase the yield rate. MAS rolling is divided into shaping rolling, which controls the side profile of the steel plate, and widening rolling, which controls the shape of the head and tail ends. When controlling the side profile of the steel plate, horizontal rollers apply variable compression to the widening surface, and then the rolled piece is rotated 90° before rolling, resulting in a rolled piece with smooth side surfaces. When controlling the head and tail ends of the steel plate, variable compression is applied to the extended surface during cross-rolling, and the rolled piece is rotated 90° before rolling to control the head and tail end shearing. The MAS rolling method reduces the head and tail shear loss rate, improves metal yield, and has significant economic benefits.

[0004] During the thinning process of thick plate rolling, accurate setting of the roll gap is crucial to ensuring the thickness accuracy and plate shape quality of the steel plate. Therefore, a more reliable roll gap setting solution for the thinning process of thick plate rolling is urgently needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a method, device and equipment for setting the roll gap during the thinning process of thick plate rolling, so as to solve the problem of low roll gap setting accuracy during the thinning process of thick plate rolling in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a method for setting a roll gap during a plate thinning process, the method comprising:

[0008] Determine the parameters of the rolled product, rolling process parameters and rolling mill parameters according to the process specification data of the thick plate rolling thinning process;

[0009] Calculating the rolling zone parameters and the deformation zone parameters during the thinning process of the steel plate according to the rolling process parameters, the rolled product parameters, and the rolling mill parameters; the rolling zone parameters at least include the rolling zone inclination angle, and the deformation zone parameters at least include the deformation resistance of the deformation zone during the thinning process and the total rolling time of the deformation zone;

[0010] Calculating the total power functional and the rolling force in the deformation zone at any time based on the deformation characteristics of the rolled piece; the deformation characteristics of the rolled piece at least include velocity boundary conditions and volume invariance conditions in the deformation zone;

[0011] The set value of the roll gap during the thinning process is obtained based on the rolling mill stiffness, the theoretical value of the roll gap and the rolling force in the deformation zone at any time.

[0012] Optionally, the rolled product parameters include at least the thickness and width of the steel plate; the rolling process parameters include at least the initial temperature of the steel plate, the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, the inlet speed of the steel plate, the length of the thinning rolling zone of the steel plate, and the friction factor between the roller and the steel plate during the rolling process; the rolling mill parameters include at least the rolling mill stiffness, the linear speed of the roller, the downward speed of the roller, the original radius of the roller, the elastic modulus of the roller, and the Poisson's ratio of the roller;

[0013] Calculating the parameters of the rolling zone and the deformation zone during the thinning process of the steel plate according to the rolling process parameters, the rolled product parameters, and the rolling mill parameters, specifically including:

[0014] Calculating the inclination angle of the thinning rolling zone of the steel plate according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate and the length of the thinning rolling zone of the steel plate;

[0015] Determining the deformation resistance of the deformation zone during the thinning process according to the rolled piece parameters and the rolling process parameters;

[0016] Calculating the total rolling time of the deformation zone according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, and the downward movement speed of the roll;

[0017] The half thickness at the exit of the deformation zone at any time is determined, and the roll distance between the two rolls is determined based on the half thickness at the exit of the deformation zone at any time, the flattening radius of the roll and the inclination angle of the rolling zone.

[0018] Optionally, before calculating the total power functional and the rolling force in the deformation zone at any time according to the deformation characteristics of the rolled piece, the following steps are also included:

[0019] Calculate the distance of the outlet position of the deformation zone from the centerline of the rollers according to the roller flattening radius, the outlet half-thickness of the deformation zone at any time, and the distance between the two rollers;

[0020] The distance of the entrance position of the rolling deformation zone from the centerline of the rolls is calculated based on the roll flattening radius, the thickness of the steel plate thick zone and the roll distance between the two rolls.

[0021] Optionally, the total power functional and the rolling force in the deformation zone at any time are calculated based on the deformation characteristics of the rolled piece, specifically including:

[0022] According to the velocity boundary conditions and volume invariance conditions of the deformation zone, the velocity field of the rolling deformation zone that meets the motion permission conditions is established;

[0023] Determine the flow rate per second, average value of contact angle and yield shear stress at the inlet of deformation zone;

[0024] Calculating the power of each component and the total power functional at any time based on the velocity field and the deformation resistance;

[0025] Calculate the total power functional corresponding to different neutral angles at any time and obtain the minimum value of the total power functional;

[0026] According to the relationship between the total power functional and the rolling force, the rolling force in the deformation zone at any time is calculated;

[0027] The rolling force and related parameters of the deformation zone are used as input data, and an iterative calculation is performed through the convergence condition between the roll flattening radius and the rolling force of the deformation zone to obtain a rolling force model that changes with time.

[0028] Optionally, calculating the inclination angle of the thinning rolling zone of the steel plate according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate and the length of the thinning rolling zone of the steel plate specifically includes:

[0029] Substitute the thickness of the thick area of ​​the steel plate, the thickness of the thin area of ​​the steel plate and the length of the thinning rolling area of ​​the steel plate into the formula:

[0030] ;

[0031] Calculation of the inclination angle of the thinning rolling zone of the steel plate ;in, is the half thickness of the steel plate thick area, is the half thickness of the thin area of ​​the steel plate, is the length of the thinning rolling zone of the steel plate;

[0032] Determining the deformation resistance of the deformation zone during the thinning process according to the rolled piece parameters and the rolling process parameters specifically includes:

[0033] The rolled product parameters and the rolling process parameters are substituted into the formula:

[0034] ;

[0035] Calculation of deformation resistance in the deformation zone during thinning ;in, For T=1000℃, , The deformation resistance of metal, is the initial temperature of the steel plate, 、 、 、 、 、 is the preset material coefficient related to the deformation condition, is the average deformation velocity, is half the thickness of the steel plate, is the half thickness of the deformation zone outlet at any time;

[0036] Calculating the total rolling time of the deformation zone according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, and the roller downward movement speed specifically includes:

[0037] Substitute the thickness of the thick area of ​​the steel plate, the thickness of the thin area of ​​the steel plate and the downward movement speed of the roller into the formula:

[0038] ;

[0039] Calculate the total rolling time in the deformation zone ;in, is the half thickness of the steel plate thick area, is the half thickness of the thin area of ​​the steel plate, is the roller downward movement speed;

[0040] Determine the half thickness at the exit of the deformation zone at any time, and determine the roll distance between the two rolls based on the half thickness at the exit of the deformation zone at any time, the roll flattening radius and the rolling zone inclination, specifically including:

[0041] Using the formula:

[0042] ;

[0043] Calculate the half thickness of the deformation zone outlet at any time , is the half thickness of the steel plate thick area, is the roller downward movement speed, 0- Any time during the rolling period;

[0044] Using the formula:

[0045] ;

[0046] Calculate half the distance between the two rolls ;in, is the roller flattening radius.

[0047] Optionally, the distance of the outlet position of the deformation zone from the centerline of the rollers is calculated based on the roller flattening radius, the outlet half-thickness of the deformation zone at any time, and the distance between the two rollers, specifically including:

[0048] According to the roller flattening radius, the outlet half-thickness of the deformation zone at any time and the distance between the two rollers, the formula is used:

[0049] ;

[0050] Calculate the distance between the outlet of the deformation zone and the centerline of the rolls ;in, is the roller flattening radius, It is half of the distance between the two rollers. is the half thickness of the deformation zone outlet at any time;

[0051] According to the roller flattening radius, the thickness of the steel plate thick zone and the distance between the two rollers, the distance of the entrance position of the rolling deformation zone from the roller centerline is calculated, specifically including:

[0052] According to the roller flattening radius, the thickness of the thick area of ​​the steel plate and the distance between the two rollers, the formula is used:

[0053] ;

[0054] Calculate the distance between the entrance of the rolling deformation zone and the centerline of the rolls ;in, It is half the thickness of the steel plate.

[0055] Optionally, the total power functional and the rolling force in the deformation zone at any time are calculated based on the deformation characteristics of the rolled piece, specifically including:

[0056] Using the formula:

[0057] ;

[0058] Calculation of rolling forces in the deformation zone ;in,

[0059] ;

[0060] ;

[0061] in, is the total power functional, is the original radius of the roller, is the force arm coefficient, is the roller linear speed, is the roller flattening radius, is half the thickness of the steel plate, It is half of the distance between the two rollers. is the half thickness of the deformation zone outlet at any time, is the roller downward movement speed, is the internal deformation power, is the shear power, is the friction power, is the neutral angle, and .

[0062] Compared to existing technologies, the present invention provides a method for setting the roll gap during the thinning process of thick plate rolling. This method determines the workpiece parameters, rolling process parameters, and rolling mill parameters based on process data for the thinning process; calculates the rolling zone parameters and deformation zone parameters during the thinning process based on the determined parameters; calculates the total power functional and the rolling force in the deformation zone at any time based on the deformation characteristics of the workpiece; and determines the set value for the roll gap during the thinning process based on the mill stiffness, the theoretical roll gap value, and the rolling force in the deformation zone at any time. This invention primarily addresses the control of the roll gap distance during the thinning process of thick plate rolling. The specific calculation method enables precise setting of the rolling force and roll gap, improving the accuracy of roll gap setting.

[0063] In a second aspect, the present invention provides a device for setting a roll gap during a thick plate rolling thinning process, the device comprising:

[0064] Basic parameter determination module, used to determine the rolled product parameters, rolling process parameters and rolling mill parameters according to the process specification data of the thick plate rolling thinning process;

[0065] a module for determining rolling zone parameters and deformation zone parameters, configured to calculate rolling zone parameters and deformation zone parameters during the thinning process of the steel plate based on the rolling process parameters, the rolled piece parameters, and the rolling mill parameters; the rolling zone parameters at least include the rolling zone inclination angle, and the deformation zone parameters at least include the deformation resistance of the deformation zone during the thinning process and the total rolling time of the deformation zone;

[0066] A rolling force calculation module for the deformation zone is used to calculate the total power functional and the rolling force in the deformation zone at any time based on the deformation characteristics of the rolled piece; the deformation characteristics of the rolled piece include at least the velocity boundary condition and the volume invariance condition of the deformation zone;

[0067] The roll gap setting value determination module is used to obtain the roll gap setting value during the thinning process based on the rolling mill stiffness, the roll gap theoretical value and the rolling force in the deformation zone at any time.

[0068] In a third aspect, the present invention provides a device for setting the roll gap during the thinning process of thick plate rolling, the device comprising:

[0069] A memory, a processor, and a communication interface coupled to the processor; the memory stores a computer program that can be run by the processor; when the processor runs the computer program, it executes the above-mentioned roll gap setting method for the thick plate rolling thinning process.

[0070] In a fourth aspect, the present invention provides a computer storage medium having instructions stored therein, which, when executed, implement the above-mentioned method for setting the roll gap in the thick plate rolling thinning process.

[0071] The technical effects achieved by the device-type solution provided in the second aspect, the equipment-type solution provided in the third aspect, and the computer storage medium solution provided in the fourth aspect are the same as those of the method-type solution provided in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0073] Figure 1 A schematic flow chart of a method for setting the roll gap in the thinning process of thick plate rolling provided by the present invention;

[0074] Figure 2 Schematic diagram of the bite zone structure during the MAS rolling thinning process in an embodiment of the present invention;

[0075] Figure 3 This is a schematic diagram of one quarter of the finished product during the MAS rolling thinning process according to an embodiment of the present invention;

[0076] Figure 4 Schematic diagram of a steel plate after the MAS rolling thinning process in an embodiment of the present invention;

[0077] Figure 5 Schematic diagram of the variation of measured and calculated rolling force values ​​over time in an embodiment of the present invention;

[0078] Figure 6 Schematic diagram of the change of the roll gap setting value over time in an embodiment of the present invention;

[0079] Figure 7 A schematic diagram of a device for setting the roll gap during the thinning process of thick plate rolling provided by the present invention;

[0080] Figure 8 This is a schematic diagram of a roll gap setting device for the thinning process of thick plate rolling provided by the present invention. DETAILED DESCRIPTION

[0081] To facilitate a clear description of the technical solutions of the embodiments of the present invention, the words "first" and "second" are used in the embodiments of the present invention to distinguish between identical or similar items with substantially the same functions and effects. For example, the first threshold and the second threshold are merely used to distinguish between different thresholds and do not limit their order. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0082] It should be noted that, in the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0083] In the present invention, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, the combination of a and b, the combination of a and c, the combination of b and c, or the combination of a, b and c, where a, b, c can be single or plural.

[0084] Regarding the control of rolling force and setting of the roll gap during MAS rolling, the present invention proposes a method for setting the roll gap during the thinning process of medium and thick plate MAS rolling, which improves the roll gap setting accuracy and optimizes the medium and thick plate thinning rolling technology. Next, the solutions provided in the embodiments of this specification are described with reference to the accompanying drawings:

[0085] like Figure 1 As shown, the process may include the following steps:

[0086] Step 110: Determine the rolled piece parameters, rolling process parameters, and rolling mill parameters based on the process specification data for the thick plate rolling thinning process.

[0087] The rolled product parameters may include the thickness and width of the steel plate;

[0088] The rolling process parameters may include the initial temperature of the steel plate, the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, the inlet speed of the steel plate, the length of the thinning rolling zone of the steel plate, and the friction factor between the roller and the steel plate during the rolling process.

[0089] The rolling mill parameters may include rolling mill stiffness, roll linear speed, roll downward speed, roll original radius, roll elastic modulus and roll Poisson's ratio.

[0090] Step 120: Calculate the rolling zone parameters and deformation zone parameters during the steel plate thinning process based on the rolling process parameters, the rolled product parameters, and the rolling mill parameters.

[0091] The rolling zone parameters may at least include the rolling zone inclination angle, and the deformation zone parameters may at least include the deformation resistance of the deformation zone during the thinning process and the total rolling time of the deformation zone.

[0092] Specifically, according to the rolling process parameters, the rolled product parameters and the rolling mill parameters, calculating the rolling zone parameters and the deformation zone parameters during the thinning process of the steel plate may include:

[0093] Calculating the inclination angle of the thinning rolling zone of the steel plate according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate and the length of the thinning rolling zone of the steel plate;

[0094] Determining the deformation resistance of the deformation zone during the thinning process according to the rolled piece parameters and the rolling process parameters;

[0095] Calculating the total rolling time of the deformation zone according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, and the downward movement speed of the roll;

[0096] The half thickness at the exit of the deformation zone at any time is determined, and the roll distance between the two rolls is determined based on the half thickness at the exit of the deformation zone at any time, the flattening radius of the roll and the inclination angle of the rolling zone.

[0097] Step 130: Calculate the total power functional and the rolling force in the deformation zone at any time based on the deformation characteristics of the rolled piece.

[0098] The deformation characteristics of the rolled piece may at least include velocity boundary conditions and volume invariance conditions in the deformation zone.

[0099] Step 140: Obtain a set value of the roll gap during the thinning process based on the rolling mill stiffness, the theoretical roll gap value, and the rolling force in the deformation zone at any time.

[0100] Figure 1The method herein determines the workpiece parameters, rolling process parameters, and mill parameters based on process data for the thinning process of thick plate rolling. The rolling zone parameters and deformation zone parameters during the thinning process are calculated based on the determined parameters. The total power functional and the rolling force in the deformation zone at any time are calculated based on the deformation characteristics of the workpiece. The set value for the roll gap during the thinning process is determined based on the mill stiffness, the theoretical roll gap value, and the rolling force in the deformation zone at any time. This invention primarily addresses the control of the roll gap distance during the thinning process of thick plate rolling. The specific calculation method enables precise setting of the rolling force and roll gap, improving roll gap setting accuracy.

[0101] based on Figure 1 The present specification also provides some specific implementation methods of the method, which are described below.

[0102] Figure 1 The corresponding complete implementation steps may include:

[0103] Step 1: Determine the workpiece parameters, rolling process parameters, and rolling mill parameters based on the process specification data for thick plate rolling thinning;

[0104] Step 2: Calculate the inclination angle of the thinning rolling zone of the steel plate by the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, and the length of the thinning rolling zone of the steel plate;

[0105] Step 3: Determine the deformation resistance of the deformation zone during the thinning process based on the rolled piece parameters and rolling process parameters;

[0106] Step 4: Calculate the total rolling time of the deformation zone based on the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, and the speed of the roller moving downward;

[0107] Step 5: Determine the half-thickness of the deformation zone outlet at any time;

[0108] Step 6: Determine half of the roll distance between the two rolls based on the exit half thickness of the deformation zone at any time, the roll flattening radius and the rolling zone inclination;

[0109] Step 7: Calculate the distance of the outlet of the deformation zone from the centerline of the rolls based on the flattening radius of the rolls, the half-thickness of the outlet of the deformation zone at any time, and the distance between the two rolls;

[0110] Step 8: Calculate the distance of the entrance of the rolling deformation zone from the centerline of the rolls based on the roll flattening radius, the thickness of the steel plate thick zone, and the distance between the two rolls;

[0111] Step 9: Calculate the total power functional and rolling force in the rolling deformation zone at any time according to the deformation characteristics of the rolled piece;

[0112] Step 10: The set value of the roll gap during the thinning process is obtained from the rolling mill stiffness, the theoretical value of the roll gap and the rolling force in the deformation zone at any time.

[0113] In actual implementation, step 130 may include the following steps:

[0114] According to the velocity boundary conditions and volume invariance conditions of the deformation zone, the velocity field of the rolling deformation zone that meets the motion permission conditions is established;

[0115] Determine the flow rate per second, average value of contact angle and yield shear stress at the inlet of deformation zone;

[0116] Calculate the power of each part and the total power functional at any time based on the velocity field and deformation resistance;

[0117] The total power functional corresponding to different neutral angles at any time is calculated to obtain the minimum value of the total power functional. Based on the relationship between the total power functional and the rolling force, the rolling force in the deformation zone at any time is calculated.

[0118] The rolling force and related parameters in the rolling deformation zone are used as input data. Through the convergence condition between the roll flattening radius and the rolling force, iterative calculation is performed to obtain the rolling force model that varies with time.

[0119] Next, in order to further illustrate the specific calculation method of the roll gap setting process in the thinning process of thick plate rolling, combined with Figure 2-Figure 4 The structural parameters in are explained:

[0120] Taking the roll gap setting process of MAS thinning of medium and heavy plate as an example, Figure 2 Schematic diagram of the bite zone structure during the MAS rolling thinning process in an embodiment of the present invention; Figure 3 This is a schematic diagram of one quarter of the finished product during the MAS rolling thinning process according to an embodiment of the present invention; Figure 4 Schematic diagram of the steel plate after the MAS rolling thinning process in the embodiment of the present invention. Figure 2-4 As shown in , the various parameters are marked in the structure.

[0121] In step 120, the steel plate thinning rolling zone inclination angle The calculation formula is formula (1):

[0122] (1)

[0123] in, is the half thickness of the steel plate thick area, is the half thickness of the thin area of ​​the steel plate, It is the length of the thinning rolling zone of the steel plate.

[0124] In step 130, the deformation resistance of the deformation zone during the thinning process The calculation formula is formula (2):

[0125] (2)

[0126] in, For T=1000℃, , The deformation resistance of metal, is the initial temperature of the steel plate, 、 、 、 、 、 is the preset material coefficient related to the deformation condition, is the average deformation velocity, is half the thickness of the steel plate, is the half thickness of the deformation zone outlet at any time.

[0127] Calculate the total rolling time in the deformation zone When , use formula (3):

[0128] (3)

[0129] in, is the half thickness of the steel plate thick area, is the half thickness of the thin area of ​​the steel plate, is the roller downward movement speed.

[0130] At any moment in the calculation, the half thickness of the deformation zone outlet Yes, use formula (4):

[0131] (4)

[0132] in, is the half thickness of the steel plate thick area, is the roller downward movement speed, is any time within the rolling time (time 0-time t0).

[0133] When calculating half of the roll distance between the two rolls When , use formula (5):

[0134] (5)

[0135] in, is the half thickness of the deformation zone outlet at any time, is the roller flattening radius, is the inclination angle of the rolling zone.

[0136] Formula (6) is used to calculate the distance between the outlet of the deformation zone and the centerline of the rolls: :

[0137] (6)

[0138] in, is the roller flattening radius, is the half thickness of the deformation zone outlet at any time, It is half of the distance between the two rollers.

[0139] Formula (7) is used to calculate the distance between the entrance of the deformation zone and the centerline of the rolls: :

[0140] (7)

[0141] in, is the roller flattening radius, is half the thickness of the steel plate, It is half of the distance between the two rollers.

[0142] Among them, the unit second flow rate at the deformation zone entrance , average contact angle and yield shear stress Calculate using formulas (8)-(10):

[0143] (8)

[0144] (9)

[0145] (10)

[0146] in, is the roller linear speed, is the roller flattening radius, is the neutral angle, , is the half width of the steel plate, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the roller downward movement speed, is half the thickness of the steel plate, is the distance between the entrance of the deformation zone and the centerline of the rolls, is the distance between the outlet of the deformation zone and the centerline of the rolls, is the inclination angle of the thinning rolling zone of the steel plate, It is the deformation resistance of the deformation zone during the thinning process.

[0147] When calculating the power of each part and the total power functional at any time, the internal deformation power is calculated first;

[0148] The internal deformation power is calculated using formula (11):

[0149] (11)

[0150] in, is the deformation resistance of the deformation zone during the thinning process, The unit is the flow rate per second, is the half thickness of the deformation zone outlet at any time, are the parameters to be determined under different production conditions, is half the thickness of the steel plate, is the half width of the steel plate, is the roller downward movement speed, is the roller flattening radius, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the average contact angle of the deformation zone, It is the inclination angle of the thinning rolling zone of the steel plate.

[0151] The shear power is calculated using formula (12):

[0152] (12)

[0153] in, is the yield shear stress, is the half width of the steel plate, is the half thickness of the deformation zone outlet at any time, is the inclination angle of the thinning rolling zone of the steel plate, is half the thickness of the steel plate, are the parameters to be determined under different production conditions, The unit is the flow rate per second, is the roller downward movement speed, is the roller flattening radius, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the distance between the outlet of the deformation zone and the centerline of the rolls, It is the distance that the entrance of the deformation zone deviates from the centerline of the rolls.

[0154] The friction power is calculated using formula (13):

[0155] (13)

[0156] in, is the friction factor, is the yield shear stress, is the half width of the steel plate, is the roller linear speed, is the roller downward movement speed, is the roller flattening radius, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the neutral angle, is the inclination angle of the thinning rolling zone of the steel plate, is the average contact angle of the deformation zone, , The unit is the flow rate per second, is the half thickness corresponding to the neutral angle, is the average contact angle of the plastic deformation zone during thinning rolling, are undetermined parameters under different production conditions.

[0157] The total power functional is calculated as follows:

[0158] (14)

[0159] The minimum value of the total power functional at any time, the rolling force in the deformation zone at any time :

[0160] (15)

[0161] in, is the total power functional, is the neutral angle, is the internal deformation power, is the shear power, is the friction power.

[0162] (16)

[0163] (17)

[0164] in, is half the thickness of the steel plate, is the half thickness of the deformation zone outlet at any time, is the roller downward movement speed, is the roller linear speed, is the original radius of the roller, is the total power functional, is the force arm coefficient, is the roller flattening radius, It is half of the distance between the two rollers.

[0165] Time-varying rolling force model:

[0166] Iterative operation: (18)

[0167] Convergence conditions: (19)

[0168] in, is the original radius of the roller, is the rolling force, is the Poisson's ratio of the roll, is the elastic modulus of the roller, is the half width of the steel plate, For the The roller radius of the iteration, For the The roller radius for the iteration.

[0169] Setting value of roller gap during thinning process :

[0170] (20)

[0171] in, It is half of the distance between the two rollers. is the rolling force, is the rolling mill stiffness.

[0172] The present invention addresses the problem of controlling the roll gap distance during the thinning process of thick plate rolling and proposes a roll gap setting method with high precision and good reliability. The method accurately sets the rolling force and roll gap, comprehensively considers cost and efficiency, reduces the head and tail cutting loss rate, improves the metal recovery rate, and has obvious economic benefits. The present invention has accurate settings, takes a short time, and can calculate the roll gap setting value in real time during the continuous thinning rolling process; Figure 5-6 As shown, Figure 5 It can be seen from the variation of the measured and calculated rolling force values ​​over time that the measured rolling force is very close to the rolling force calculated by the model of the present invention, with an error within 7%. Figure 6 This is a schematic diagram of the change of the roll gap setting value over time in an embodiment of the present invention. The calculated value of the roll gap basically coincides with the measured value, and the error is within 0.5%. Therefore, the technical solution provided by the present invention improves the roll gap setting accuracy and optimizes the thinning rolling technology of medium and thick plates.

[0173] Based on the same idea, the present invention also provides a device for setting the roll gap during the thinning process of thick plate rolling. Figure 7 As shown, the device may include:

[0174] The basic parameter determination module 710 is used to determine the rolled product parameters, rolling process parameters and rolling mill parameters according to the process specification data of the thick plate rolling thinning process;

[0175] The rolling zone parameter and deformation zone parameter determination module 720 is configured to calculate the rolling zone parameters and deformation zone parameters during the thinning process of the steel plate based on the rolling process parameters, the rolled product parameters, and the rolling mill parameters; the rolling zone parameters include at least the rolling zone inclination angle, and the deformation zone parameters include at least the deformation resistance of the deformation zone during the thinning process and the total rolling time of the deformation zone;

[0176] The rolling force calculation module 730 in the deformation zone is used to calculate the total power functional and the rolling force in the deformation zone at any time based on the deformation characteristics of the rolled piece; the deformation characteristics of the rolled piece include at least the velocity boundary condition and the volume invariance condition of the deformation zone;

[0177] The roll gap setting value determination module 740 is used to obtain the roll gap setting value during the thinning process according to the rolling mill stiffness, the roll gap theoretical value and the rolling force in the deformation zone at any time.

[0178] based on Figure 7 The device may further include some specific implementation units:

[0179] Optionally, the rolled product parameters may include at least the thickness and width of the steel plate; the rolling process parameters may include at least the initial temperature of the steel plate, the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, the inlet speed of the steel plate, the length of the thinning rolling zone of the steel plate, and the friction factor between the roller and the steel plate during the rolling process; the rolling mill parameters may include at least the rolling mill stiffness, the linear speed of the roller, the downward speed of the roller, the original radius of the roller, the elastic modulus of the roller, and the Poisson's ratio of the roller;

[0180] The rolling zone parameter and deformation zone parameter determination module 720 may specifically include:

[0181] a steel plate thinning zone inclination angle calculation unit, configured to calculate the steel plate thinning zone inclination angle according to the thickness of the steel plate thick zone, the thickness of the steel plate thin zone and the length of the steel plate thinning zone;

[0182] a deformation resistance calculation unit, configured to determine the deformation resistance of the deformation zone during the thinning process according to the rolled piece parameters and the rolling process parameters;

[0183] a deformation zone total rolling time calculation unit, configured to calculate the deformation zone total rolling time according to the thickness of the steel plate thick zone, the thickness of the steel plate thin zone, and the roller downward movement speed;

[0184] The roll distance determination unit of the two rolls is used to determine the half thickness of the deformation zone outlet at any time, and determines the roll distance of the two rolls based on the half thickness of the deformation zone outlet at any time, the roll flattening radius and the rolling zone inclination.

[0185] Optionally, the device may further include:

[0186] A module for calculating the distance of the deformation zone outlet position from the roller centerline, for calculating the distance of the deformation zone outlet position from the roller centerline based on the roller flattening radius, the outlet half-thickness of the deformation zone at any time, and the distance between the two rollers;

[0187] The module for calculating the distance between the entrance position of the deformation zone and the centerline of the rolls is used to calculate the distance between the entrance position of the deformation zone and the centerline of the rolls according to the flattening radius of the rolls, the thickness of the thick zone of the steel plate and the distance between the two rolls.

[0188] Optionally, the deformation zone rolling force calculation module 730 may be specifically used to:

[0189] According to the velocity boundary conditions and volume invariance conditions of the deformation zone, the velocity field of the rolling deformation zone that meets the motion permission conditions is established;

[0190] Determine the flow rate per second, average value of contact angle and yield shear stress at the inlet of deformation zone;

[0191] Calculating the power of each component and the total power functional at any time based on the velocity field and the deformation resistance;

[0192] Calculate the total power functional corresponding to different neutral angles at any time and obtain the minimum value of the total power functional;

[0193] According to the relationship between the total power functional and the rolling force, the rolling force in the deformation zone at any time is calculated;

[0194] The rolling force and related parameters of the deformation zone are used as input data, and an iterative calculation is performed through the convergence condition between the roll flattening radius and the rolling force of the deformation zone to obtain a rolling force model that changes with time.

[0195] Optionally, the steel plate thinning rolling zone inclination angle calculation unit can be specifically used for:

[0196] Substitute the thickness of the thick area of ​​the steel plate, the thickness of the thin area of ​​the steel plate and the length of the thinning rolling area of ​​the steel plate into the formula:

[0197] ;

[0198] Calculation of the inclination angle of the thinning rolling zone of the steel plate ;in, is the half thickness of the steel plate thick area, is the half thickness of the thin area of ​​the steel plate, is the length of the thinning rolling zone of the steel plate;

[0199] The deformation resistance calculation unit can be used for:

[0200] The rolled product parameters and the rolling process parameters are substituted into the formula:

[0201] ;

[0202] Calculation of deformation resistance in the deformation zone during thinning ;in, For T=1000℃, , The deformation resistance of metal, is the initial temperature of the steel plate, 、 、 、 、 、 is the preset material coefficient related to the deformation condition, is the average deformation velocity, is half the thickness of the steel plate, is the half thickness of the deformation zone outlet at any time;

[0203] The total rolling time calculation unit of the deformation zone can be used specifically for:

[0204] Substitute the thickness of the thick area of ​​the steel plate, the thickness of the thin area of ​​the steel plate and the downward movement speed of the roller into the formula:

[0205] ;

[0206] Calculate the total rolling time in the deformation zone ;in, is the half thickness of the steel plate thick area, is the half thickness of the thin area of ​​the steel plate, is the roller downward movement speed;

[0207] The two-roller gap determination unit can be specifically used for:

[0208] Using the formula:

[0209] ;

[0210] Calculate the half thickness of the deformation zone outlet at any time , is the half thickness of the steel plate thick area, is the roller downward movement speed, 0- Any time during the rolling period;

[0211] Using the formula:

[0212] ;

[0213] Calculate half the distance between the two rolls ;in, is the roller flattening radius.

[0214] Optionally, the module for calculating the distance of the deformation zone outlet position from the roller centerline may be used for:

[0215] According to the roller flattening radius, the outlet half-thickness of the deformation zone at any time and the distance between the two rollers, the formula is used:

[0216] ;

[0217] Calculate the distance between the outlet of the deformation zone and the centerline of the rolls ;in, is the roller flattening radius, It is half of the distance between the two rollers. is the half thickness of the deformation zone outlet at any time;

[0218] The module for calculating the distance between the deformation zone entrance position and the roller centerline can be used to:

[0219] According to the roller flattening radius, the thickness of the thick area of ​​the steel plate and the distance between the two rollers, the formula is used:

[0220] ;

[0221] Calculate the distance between the entrance of the rolling deformation zone and the centerline of the rolls ;in, It is half the thickness of the steel plate.

[0222] Optionally, the deformation zone rolling force calculation module 730 may be specifically used to:

[0223] Using the formula:

[0224] ;

[0225] Calculation of rolling forces in the deformation zone ;in,

[0226] ;

[0227] ;

[0228] in, is the total power functional, is the original radius of the roller, is the force arm coefficient, is the roller linear speed, is the roller flattening radius, is half the thickness of the steel plate, It is half of the distance between the two rollers. is the half thickness of the deformation zone outlet at any time, is the roller downward movement speed, is the internal deformation power, is the shear power, is the friction power, is the neutral angle, and .

[0229] Based on the same idea, the embodiment of this specification also provides a device for setting the roll gap during the thinning process of thick plate rolling. Figure 8 As shown, this may include:

[0230] A memory, a processor, and a communication interface coupled to the processor; the memory stores a computer program that can be run by the processor; when the processor runs the computer program, it executes the roll gap setting method for the thick plate rolling thinning process described in the above embodiment.

[0231] like Figure 8 As shown, the terminal device may further include a communication line. The communication line may include a path for transmitting information between the components.

[0232] Optional, such as Figure 8 As shown, the terminal device may further include a memory. The memory is used to store computer-executable instructions for executing the solution of the present invention, and the execution is controlled by the processor. The processor is used to execute the computer-executable instructions stored in the memory, thereby implementing the method provided by the embodiment of the present invention.

[0233] In a specific implementation, as an embodiment, Figure 8 As shown, the processor may include one or more CPUs, such as Figure 8 CPU0 and CPU1 in.

[0234] In a specific implementation, as an embodiment, Figure 8 As shown, the terminal device may include multiple processors, such as Figure 8 Each of these processors can be a single-core processor or a multi-core processor.

[0235] Based on the same idea, the embodiments of this specification also provide a computer storage medium corresponding to the above embodiments. The computer storage medium stores instructions, and when the instructions are executed, the method in the above embodiments is implemented.

[0236] The above mainly introduces the solution provided by the embodiment of the present invention from the perspective of the interaction between the various modules. It can be understood that, in order to realize the above functions, each module includes a hardware structure and software unit corresponding to the execution of each function. It should be easy for those skilled in the art to realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0237] The embodiments of the present invention can be divided into functional modules according to the above-mentioned method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into a single processing module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present invention is illustrative and is only a logical functional division. In actual implementation, other division methods may be used.

[0238] The processor in this specification may also function as a memory. The memory is used to store computer-executable instructions for implementing the solutions of the present invention, and the processor controls execution thereof. The processor is used to execute the computer-executable instructions stored in the memory, thereby implementing the methods provided in the embodiments of the present invention.

[0239] Optionally, the computer-executable instructions in the embodiment of the present invention may also be referred to as application program codes, which is not specifically limited in the embodiment of the present invention.

[0240] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may implement several functions listed in the claims. The fact that certain measures are recorded in mutually different dependent claims does not mean that these measures cannot be combined to produce good results.

[0241] Although the present invention has been described with reference to specific features and embodiments thereof, it will be apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the invention. Accordingly, this specification and drawings are merely illustrative of the invention as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the invention. It will be apparent that various modifications and variations may be made to the present invention by those skilled in the art without departing from the spirit and scope of the invention. Thus, the present invention is intended to include such modifications and variations as fall within the scope of the claims of the present invention and their equivalents.

Claims

1. A method for setting the roll gap during the thinning process of thick plate rolling, characterized in that: Methods include: Determine the parameters of the rolled product, rolling process parameters and rolling mill parameters according to the process specification data of the thick plate rolling thinning process; Calculating the rolling zone parameters and the deformation zone parameters during the thinning process of the steel plate according to the rolling process parameters, the rolled product parameters, and the rolling mill parameters; the rolling zone parameters at least include the rolling zone inclination angle, and the deformation zone parameters at least include the deformation resistance of the deformation zone during the thinning process and the total rolling time of the deformation zone; Calculating the total power functional and the rolling force in the deformation zone at any time based on the deformation characteristics of the rolled piece; the deformation characteristics of the rolled piece at least include velocity boundary conditions and volume invariance conditions in the deformation zone; The set value of the roll gap during the thinning process is obtained based on the rolling mill stiffness, the theoretical roll gap value and the rolling force in the deformation zone at any time. According to the deformation characteristics of the rolled piece, the total power functional and the rolling force in the deformation zone at any time are calculated, including: Using the formula: ； Calculation of rolling forces in the deformation zone ;in, ； ； in, is the total power functional, is the original radius of the roller, is the force arm coefficient, is the roller linear speed, is the roller flattening radius, is half the thickness of the steel plate, It is half of the distance between the two rollers. is the half thickness of the deformation zone outlet at any time, is the roller downward movement speed, is the internal deformation power, is the shear power, is the friction power, is the neutral angle, and ; When calculating the power of each part and the total power functional at any time, the internal deformation power is calculated first; The internal deformation power is calculated using the formula: ； Perform calculations; in, is the deformation resistance of the deformation zone during the thinning process, The unit is the flow rate per second, is the half thickness of the deformation zone outlet at any time, are the parameters to be determined under different production conditions, is half the thickness of the steel plate, is the half width of the steel plate, is the roller downward movement speed, is the roller flattening radius, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the average contact angle of the deformation zone, is the inclination angle of the thinning rolling zone of the steel plate; Shear power is calculated using the formula: ； Calculate, where is the yield shear stress, is the half width of the steel plate, is the half thickness of the deformation zone outlet at any time, is the inclination angle of the thinning rolling zone of the steel plate, is half the thickness of the steel plate, are the parameters to be determined under different production conditions, The unit is the flow rate per second, is the roller downward movement speed, is the roller flattening radius, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the distance between the outlet of the deformation zone and the centerline of the rolls, The distance between the entrance of the deformation zone and the centerline of the rolls; Friction power is calculated using the formula: ； Calculate, where is the friction factor, is the yield shear stress, is the half width of the steel plate, is the roller linear speed, is the roller downward movement speed, is the roller flattening radius, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the neutral angle, is the inclination angle of the thinning rolling zone of the steel plate, is the average contact angle of the deformation zone, , The unit is the flow rate per second, is the half thickness corresponding to the neutral angle, is the average contact angle of the plastic deformation zone during thinning rolling, are undetermined parameters under different production conditions.

2. The method for setting the roll gap during the thinning process of thick plate rolling according to claim 1, characterized in that: The rolled product parameters include at least the thickness and width of the steel plate; the rolling process parameters include at least the initial temperature of the steel plate, the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, the inlet speed of the steel plate, the length of the thinning rolling zone of the steel plate, and the friction factor between the roller and the steel plate during the rolling process; the rolling mill parameters include at least the rolling mill stiffness, the linear speed of the roller, the downward speed of the roller, the original radius of the roller, the elastic modulus of the roller, and the Poisson's ratio of the roller; Calculating the parameters of the rolling zone and the deformation zone during the thinning process of the steel plate according to the rolling process parameters, the rolled product parameters, and the rolling mill parameters, specifically including: Calculating the inclination angle of the thinning rolling zone of the steel plate according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate and the length of the thinning rolling zone of the steel plate; Determining the deformation resistance of the deformation zone during the thinning process according to the rolled piece parameters and the rolling process parameters; Calculating the total rolling time of the deformation zone according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, and the downward movement speed of the roll; The half thickness at the exit of the deformation zone at any time is determined, and the roll distance between the two rolls is determined based on the half thickness at the exit of the deformation zone at any time, the flattening radius of the roll and the inclination angle of the rolling zone.

3. The method for setting the roll gap during the thinning process of thick plate rolling according to claim 2, characterized in that: According to the deformation characteristics of the rolled piece, before calculating the total power functional and the rolling force in the deformation zone at any time, it also includes: Calculate the distance of the outlet position of the deformation zone from the centerline of the rollers according to the roller flattening radius, the outlet half-thickness of the deformation zone at any time, and the distance between the two rollers; The distance of the entrance position of the rolling deformation zone from the centerline of the rolls is calculated based on the roll flattening radius, the thickness of the steel plate thick zone and the roll distance between the two rolls.

4. The method for setting the roll gap during the thinning process of thick plate rolling according to claim 2, characterized in that: According to the deformation characteristics of the rolled piece, the total power functional and the rolling force in the deformation zone at any time are calculated, including: According to the velocity boundary conditions and volume invariance conditions of the deformation zone, the velocity field of the rolling deformation zone that meets the motion permission conditions is established; Determine the flow rate per second, average value of contact angle and yield shear stress at the inlet of deformation zone; Calculating the power of each component and the total power functional at any time based on the velocity field and the deformation resistance; Calculate the total power functional corresponding to different neutral angles at any time and obtain the minimum value of the total power functional; According to the relationship between the total power functional and the rolling force, the rolling force in the deformation zone at any time is calculated; The rolling force and related parameters of the deformation zone are used as input data, and an iterative calculation is performed through the convergence condition between the roll flattening radius and the rolling force of the deformation zone to obtain a rolling force model that changes with time.

5. The method for setting the roll gap during the thinning process of thick plate rolling according to claim 3, characterized in that: Calculating the inclination angle of the thinning rolling zone of the steel plate according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate and the length of the thinning rolling zone of the steel plate specifically includes: Substitute the thickness of the thick area of ​​the steel plate, the thickness of the thin area of ​​the steel plate and the length of the thinning rolling area of ​​the steel plate into the formula: ； Calculation of the inclination angle of the thinning rolling zone of the steel plate ;in, is the half thickness of the steel plate thick area, is the half thickness of the thin area of ​​the steel plate, is the length of the thinning rolling zone of the steel plate; Determining the deformation resistance of the deformation zone during the thinning process according to the rolled piece parameters and the rolling process parameters specifically includes: Substitute the rolled product parameters and the rolling process parameters into the formula: ； Calculation of deformation resistance in the deformation zone during thinning ;in, For T=1000℃, , The deformation resistance of metal, is the initial temperature of the steel plate, 、 、 、 、 、 is the preset material coefficient related to the deformation condition, is the average deformation velocity, is half the thickness of the steel plate, is the half thickness of the deformation zone outlet at any time; Calculating the total rolling time of the deformation zone according to the thickness of the thick zone of the steel plate, the thickness of the thin zone of the steel plate, and the roller downward movement speed specifically includes: Substitute the thickness of the thick area of ​​the steel plate, the thickness of the thin area of ​​the steel plate and the downward movement speed of the roller into the formula: ； Calculate the total rolling time in the deformation zone ;in, is the half thickness of the steel plate thick area, is the half thickness of the thin area of ​​the steel plate, is the roller downward movement speed; Determine the half thickness at the exit of the deformation zone at any time, and determine the roll distance between the two rolls based on the half thickness at the exit of the deformation zone at any time, the roll flattening radius and the rolling zone inclination, specifically including: Using the formula: ； Calculate the half thickness of the deformation zone outlet at any time , is the half thickness of the steel plate thick area, is the roller downward movement speed, 0- Any time during the rolling period; Using the formula: ； Calculate half the distance between the two rolls ;in, is the roller flattening radius.

6. The method for setting the roll gap during the thinning process of thick plate rolling according to claim 3, characterized in that: The distance of the outlet position of the deformation zone from the centerline of the rolls is calculated based on the roller flattening radius, the outlet half-thickness of the deformation zone at any time, and the distance between the two rolls. Specifically, the distance includes: According to the roller flattening radius, the outlet half-thickness of the deformation zone at any time and the distance between the two rollers, the formula is used: ； Calculate the distance between the outlet of the deformation zone and the centerline of the rolls ;in, is the roller flattening radius, It is half of the distance between the two rollers. is the half thickness of the deformation zone outlet at any time; According to the roller flattening radius, the thickness of the steel plate thick zone and the distance between the two rollers, the distance of the entrance position of the rolling deformation zone from the roller centerline is calculated, specifically including: According to the roller flattening radius, the thickness of the thick area of ​​the steel plate and the distance between the two rollers, the formula is used: ； Calculate the distance between the entrance of the rolling deformation zone and the centerline of the rolls ;in, It is half the thickness of the steel plate.

7. A device for setting the roll gap during the thinning process of thick plate rolling, characterized in that: The device includes: Basic parameter determination module, used to determine the rolled product parameters, rolling process parameters and rolling mill parameters according to the process specification data of the thick plate rolling thinning process; a module for determining rolling zone parameters and deformation zone parameters, configured to calculate rolling zone parameters and deformation zone parameters during the thinning process of the steel plate based on the rolling process parameters, the rolled piece parameters, and the rolling mill parameters; the rolling zone parameters at least include the rolling zone inclination angle, and the deformation zone parameters at least include the deformation resistance of the deformation zone during the thinning process and the total rolling time of the deformation zone; A rolling force calculation module for the deformation zone is used to calculate the total power functional and the rolling force in the deformation zone at any time based on the deformation characteristics of the rolled piece; the deformation characteristics of the rolled piece include at least the velocity boundary condition and the volume invariance condition of the deformation zone; The roll gap setting value determination module is used to obtain the roll gap setting value during the thinning process based on the rolling mill stiffness, the theoretical roll gap value and the rolling force in the deformation zone at any time; According to the deformation characteristics of the rolled piece, the total power functional and the rolling force in the deformation zone at any time are calculated, including: Using the formula: ； Calculation of rolling forces in the deformation zone ;in, ； ； in, is the total power functional, is the original radius of the roller, is the force arm coefficient, is the roller linear speed, is the roller flattening radius, is half the thickness of the steel plate, It is half of the distance between the two rollers. is the half thickness of the deformation zone outlet at any time, is the roller downward movement speed, is the internal deformation power, is the shear power, is the friction power, is the neutral angle, and ; When calculating the power of each part and the total power functional at any time, the internal deformation power is calculated first; The internal deformation power is calculated using the formula: ； Perform calculations; in, is the deformation resistance of the deformation zone during the thinning process, The unit is the flow rate per second, is the half thickness of the deformation zone outlet at any time, are the parameters to be determined under different production conditions, is half the thickness of the steel plate, is the half width of the steel plate, is the roller downward movement speed, is the roller flattening radius, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the average contact angle of the deformation zone, is the inclination angle of the thinning rolling zone of the steel plate; Shear power is calculated using the formula: ； Calculate, where is the yield shear stress, is the half width of the steel plate, is the half thickness of the deformation zone outlet at any time, is the inclination angle of the thinning rolling zone of the steel plate, is half the thickness of the steel plate, are the parameters to be determined under different production conditions, The unit is the flow rate per second, is the roller downward movement speed, is the roller flattening radius, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the distance between the outlet of the deformation zone and the centerline of the rolls, The distance between the entrance of the deformation zone and the centerline of the rolls; Friction power is calculated using the formula: ； Calculate, where is the friction factor, is the yield shear stress, is the half width of the steel plate, is the roller linear speed, is the roller downward movement speed, is the roller flattening radius, is the angle between the line connecting the contact point at the entrance of the rolling deformation zone and the center of the roll and the line connecting the centers of the rolls at any time, is the neutral angle, is the inclination angle of the thinning rolling zone of the steel plate, is the average contact angle of the deformation zone, , The unit is the flow rate per second, is the half thickness corresponding to the neutral angle, is the average contact angle of the plastic deformation zone during thinning rolling, are undetermined parameters under different production conditions.

8. A device for setting the roll gap during the thinning process of thick plate rolling, characterized in that the device include: a memory, a processor, and a communication interface coupled to the processor; The memory stores a computer program executable by the processor; When the processor runs the computer program, it executes the roll gap setting method for the thick plate rolling thinning process according to any one of claims 1 to 6.

9. A computer storage medium, characterized in that The computer storage medium stores instructions, and when the instructions are executed, the roll gap setting method for the thick plate rolling thinning process according to any one of claims 1 to 6 is implemented.

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