Roll gap calculation method, device and equipment in thickness increasing rolling process of metal plate blank

Abstract

The invention discloses a roll gap calculation method, device and equipment in the thickness increasing rolling process of a metal plate blank, relates to the technical field of metal rolling, and aims to solve the problem of low calculation precision of rolling force and roll gaps in the thickness increasing rolling process of the metal plate blank in the prior art. Comprising the following steps: determining roller parameters, rolled piece parameters and rolling process parameters according to target pass rolling process regulation data; according to the deformation characteristics of a rolled piece, a speed field meeting speed boundary conditions is established, and target parameters in the thickness increasing rolling process of the metal plate blank are calculated; based on the internal deformation power, the friction power and the shearing power at any moment in the thickness increasing rolling process of the metal plate blank, the total power functional minimum value at any moment is obtained, and the deformation area rolling force at any moment in the thickness increasing rolling process of the metal plate blank is calculated; and according to the roller gap distance and the deformation area rolling force, the roller gap calculation value in the metal plate blank thickness increasing rolling process is calculated.

Description

Technical Field

[0001] The present invention relates to the technical field of metal rolling, and particularly to a method, device, and equipment for calculating roll gap in the process of increasing the thickness of a metal slab. Background Art

[0002] Longitudinal profiled (LP) steel plates are obtained through a special variable-thickness rolling process. Their thickness varies along the rolling direction and they are products produced by a typical variable-thickness rolling technology. During the manufacturing process of longitudinal profiled steel plates, the opening of the rolling rolls is continuously changed to change the longitudinal thickness, which is also called wedge-shaped steel plates. Traditionally rolled steel plates pursue uniform thickness, but during the use of steel plates, the loads they bear are usually non-uniform. Using a uniform thickness to bear non-uniform external forces will definitely cause waste of steel. Longitudinal profiled steel plates have advantages such as saving steel and reducing the structural weight, and are called energy-saving green steel plates. They can be made into various shapes according to the different stress conditions in different applications to obtain the best material-saving effect.

[0003] Longitudinal profiled steel plates are in great demand in fields such as shipbuilding, bridge building, and construction. Their special cross-section can meet different weight reduction design requirements in steel structures such as ships, bridges, and buildings. Their advantages are: reducing the structural mass, reducing the amount of welding work, eliminating the backing plates in bolted joints and the machining at welded joints, reducing the manufacturing cost, and improving the structural safety. Longitudinal profiled steel plates have good application prospects and are favored by domestic and foreign steel manufacturers and the construction engineering industry, and have broad application prospects. During the rolling process, the thickness of longitudinal profiled steel plates changes continuously. Before the rolling process, a mathematical method different from traditional rolling is needed to preset important parameters such as rolling force and roll gap.

[0004] Therefore, there is an urgent need to provide a more reliable roll gap calculation scheme for the process of increasing the thickness of a metal slab. Summary of the Invention

[0005] The purpose of the present invention is to provide a method, device, and equipment for calculating roll gap in the process of increasing the thickness of a metal slab, which is used to solve the problem of low calculation accuracy of rolling force and roll gap in the process of increasing the thickness of a metal slab in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: In the first aspect, the present invention provides a method for calculating roll gap in the process of increasing the thickness of a metal slab. The method includes: Determine roll parameters, workpiece parameters, and rolling process parameters according to the rolling process specification data of the target pass; According to the deformation characteristics of the rolled piece, establish a velocity field that satisfies the velocity boundary conditions, and calculate the target parameters during the rolling process of increasing the thickness of the metal slab; the target parameters at least include the rolling time corresponding to the rolling process of increasing the thickness of the metal slab, the inclination angle of the rolling zone, the distance of the outlet position of the thickness-increasing rolling deformation zone deviating from the center line of the rolls, the distance of the inlet position of the thickness-increasing rolling deformation zone deviating from the center line of the rolls, and the deformation resistance of the deformation zone. Based on the internal deformation power, friction power, and shear power at any moment during the rolling process of increasing the thickness of the metal slab, obtain the minimum value of the total power functional at any moment, and calculate the rolling force of the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab. According to the roll gap spacing and the rolling force of the deformation zone, calculate the calculated value of the roll gap during the rolling process of increasing the thickness of the metal slab.

[0007] Optionally, according to the deformation characteristics of the rolled piece, establish a velocity field that satisfies the velocity boundary conditions, and calculate the target parameters during the rolling process of increasing the thickness of the metal slab, specifically including: According to the velocity boundary conditions of the deformation zone and the volume invariance condition, establish a velocity field and a strain rate field of the rolling deformation zone that satisfy the kinematically admissible conditions. Determine the rolling time and the inclination angle of the rolling zone corresponding to the rolling process of increasing the thickness of the metal slab from the upward movement speed of the rolls, the length of the thickness-increasing rolling zone of the rolled piece, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece. Calculate the distance of the outlet position of the thickness-increasing rolling deformation zone deviating from the center line of the rolls and the distance of the inlet position of the thickness-increasing rolling deformation zone deviating from the center line of the rolls. Calculate the deformation resistance of the deformation zone of the metal slab according to the material of the rolled piece and the rolling process parameters.

[0008] Optionally, based on the internal deformation power, friction power, and shear power at any moment during the rolling process of increasing the thickness of the metal slab, obtain the minimum value of the total power functional at any moment, and calculate the rolling force of the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab, specifically including: According to the deformation resistance, calculate the internal deformation power, friction power, and shear power at any moment during the rolling process of increasing the thickness of the metal slab. Calculate the total power functional according to the internal deformation power, friction power, and shear power. According to the total power functional corresponding to different neutral angles, obtain the minimum value of the total power functional at any moment. Calculate the rolling force of the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab according to the relationship between the total power functional and the rolling force.

[0009] Optionally, according to the velocity boundary conditions of the deformation zone and the volume invariance condition, establish a velocity field and a strain rate field of the rolling deformation zone that satisfy the kinematically admissible conditions, specifically including: Adopt the formula: ; Calculate the velocity field of the rolling deformation zone; where is the velocity component in the length direction of the rolled piece, is the entry velocity of the rolled piece, is the undetermined parameter under different production conditions, is the thickness of the rolled piece, is the thickness of the rolled piece at any position in the deformation zone, is the upward movement velocity of the roll, is the flattened radius of the roll, is the angle between the line connecting the entry contact point of the rolling deformation zone to the center of the roll and the center line of the rolls at any moment, is the angle between the line connecting any point in the rolling deformation zone to the center of the roll and the center line of the rolls, is the velocity component in the width direction of the rolled piece, is the velocity component in the thickness direction of the rolled piece, , represents the width direction of the rolled piece, represents the thickness direction of the rolled piece; Adopt the formula: ; Calculate the strain rate field of the rolling deformation zone; where is the strain rate component in the length direction of the rolled piece, is the strain rate component in the width direction of the rolled piece, is the strain rate component in the thickness direction of the rolled piece.

[0010] Optionally, determine the rolling time and the rolling zone inclination angle corresponding to the rolling process of increasing the thickness of the metal slab by the upward movement velocity of the roll, the length of the rolling zone increased by the thickness of the rolled piece, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece. Specifically, it includes: Substitute the upward movement velocity of the roll, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece into the formula: ; Calculate the rolling time corresponding to the rolling process of increasing the thickness of the metal slab; where is the thickness of the thick zone of the rolled piece, is the thickness of the thin zone of the rolled piece, is the upward movement velocity of the roll; Substitute the length of the rolling zone increased by the thickness of the rolled piece, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece into the formula: ; Calculate the rolling zone inclination angle corresponding to the rolling process of increasing the thickness of the metal slab; where is the length of the rolling zone increased by the thickness of the rolled piece.

[0011] Optionally, calculate the distance by which the exit position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls and the distance by which the entry position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls. Specifically, it includes: Using the formula: ; ; ; ; Calculate the distance by which the exit position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls and the distance by which the entry position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls; where is the distance by which the entry position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls, is the distance by which the exit position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls, is the thickness at the exit of the deformation zone at any moment, is the thickness of the thin zone of the rolled piece, is the upward speed of the rolls, is any moment within the rolling time, is the roll gap spacing, is the flattening radius of the rolls, is the inclination angle of the rolling zone, is the thickness of the rolled piece; The calculating the deformation resistance of the deformation zone of the metal slab according to the material of the rolled piece and the rolling process parameters specifically includes: Using the formula: ; Calculate the deformation resistance of the deformation zone of the metal slab; where is the deformation resistance of the deformation zone of the metal slab, is T = 1000 °C, , is the deformation resistance of the metal at , , , , , are preset material coefficients related to the deformation conditions, is the initial temperature of the rolled piece, is the average deformation speed.

[0012] Optionally, based on the internal deformation power, friction power, and shear power at any moment during the thickness-increasing rolling of the metal slab, obtain the minimum value of the total power functional at any moment, and calculate the rolling force of the deformation zone during the thickness-increasing rolling of the metal slab. Specifically, it includes: Adopt the formula: ; Calculate the minimum value of the total power functional at any moment; where is the total power functional, is the neutral angle, is the internal deformation power, is the shear power, is the friction power; Adopt the formula: ; Calculate the rolling force in the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab; ; where is the force arm coefficient, is the linear velocity of the roll, is the original radius of the roll, is the velocity component in the width direction of the rolled piece.

[0013] Optionally, according to the roll gap spacing and the rolling force in the deformation zone, calculate the calculated value of the roll gap during the rolling process of increasing the thickness of the metal slab, specifically including: Adopt the formula: ; Calculate the calculated value of the roll gap during the rolling process of increasing the thickness of the metal slab; where is the roll gap spacing, is the rolling force in the deformation zone, is the stiffness of the rolling mill.

[0014] Compared with the prior art, the method for calculating the roll gap during the rolling process of increasing the thickness of the metal slab provided by the present invention determines the roll parameters, rolled piece parameters and rolling process parameters by following the rolling process specification data of the target pass; establishes a velocity field that satisfies the velocity boundary conditions according to the deformation characteristics of the rolled piece, and calculates the target parameters during the rolling process of increasing the thickness of the metal slab; based on the internal deformation power, friction power and shear power at any moment during the rolling process of increasing the thickness of the metal slab, obtains the minimum value of the total power functional at any moment, and calculates the rolling force in the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab; calculates the calculated value of the roll gap during the rolling process of increasing the thickness of the metal slab according to the roll gap spacing and the rolling force in the deformation zone. The solution provided by the present invention mainly aims at the calculation of the roll gap during the rolling process of increasing the thickness of the metal slab, can calculate the roll gap during the rolling process of increasing the thickness in real time, saves production costs, improves production efficiency, and well controls the thickness of the rolled piece, achieving the purpose of improving the calculation accuracy of the roll gap during the rolling process of increasing the thickness of the metal slab.

[0015] In a second aspect, the present invention provides a roll gap calculation device for the process of increasing the thickness of a metal slab. The device includes: A first parameter determination module for determining roll parameters, workpiece parameters, and rolling process parameters according to the rolling process specification data of the target pass; A second parameter determination module for establishing a velocity field that satisfies the velocity boundary conditions according to the deformation characteristics of the workpiece, and calculating the target parameters in the process of increasing the thickness of the metal slab; the target parameters at least include the rolling time corresponding to the process of increasing the thickness of the metal slab, the inclination angle of the rolling zone, the distance of the outlet position of the thickness-increasing rolling deformation zone from the center line of the rolls, the distance of the inlet position of the thickness-increasing rolling deformation zone from the center line of the rolls, and the deformation resistance of the deformation zone; A rolling force determination module in the deformation zone for obtaining the minimum value of the total power functional at any moment based on the internal deformation power, friction power, and shear power at any moment in the process of increasing the thickness of the metal slab, and calculating the rolling force in the deformation zone at any moment in the process of increasing the thickness of the metal slab; A roll gap calculation module for calculating the calculated value of the roll gap in the process of increasing the thickness of the metal slab according to the roll gap spacing and the rolling force in the deformation zone.

[0016] In a third aspect, the present invention provides a roll gap calculation device for the process of increasing the thickness of a metal slab. The device includes: A memory, a processor, and a communication interface coupled to the processor; a computer program executable by the processor is stored on the memory; when the processor runs the computer program, it executes the above-mentioned roll gap calculation method for the process of increasing the thickness of the metal slab.

[0017] The technical effects achieved by the device-type solutions provided in the second aspect and the device-type solutions provided in the third aspect are the same as those of the method-type solutions provided in the first aspect, and will not be elaborated here. Description of the Drawings

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic flow chart of the roll gap calculation method for the process of increasing the thickness of the metal slab provided by the present invention; Figure 2 It is a schematic structural diagram of the biting zone in the process of increasing the thickness of the metal slab in an embodiment of the present invention; Figure 3 It is a quarter schematic diagram of the finished product of increasing the thickness of the metal slab in an embodiment of the present invention; Figure 4 It is a schematic diagram of the steel plate thickness changing with time in an embodiment of the present invention; Figure 5 Schematic diagram showing the measured and calculated rolling forces varying with time in an embodiment of the present invention; Figure 6 Schematic diagram showing the calculated roll gap varying with time in an embodiment of the present invention; Figure 7 Schematic structural diagram of a roll gap calculation device for the rolling process with increased thickness of a metal slab provided by the present invention; Figure 8 Schematic structural diagram of a roll gap calculation device for the rolling process with increased thickness of a metal slab provided by the present invention. Detailed implementation manners

[0019] For the convenience of clearly describing the technical solutions in the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and effects. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and do not limit their sequence. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and "first", "second", etc. do not necessarily mean different.

[0020] It should be noted that in the present invention, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be construed as being more preferred or having more advantages than other embodiments or designs. Exactly, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner.

[0021] In the present invention, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b or c can represent: a, b, c, the combination of a and b, the combination of a and c, the combination of b and c, or the combination of a, b and c, where a, b and c can be single or multiple.

[0022] The present invention achieves the purpose of accurately presetting the rolling force and roll gap in the rolling process and improving the calculation accuracy through a new rolling mathematical calculation method. Next, the solutions provided in the embodiments of this specification will be described with reference to the accompanying drawings: AsFigure 1 As shown, the process may include the following steps: Step 110: Determine the roll parameters, workpiece parameters, and rolling process parameters according to the target pass rolling process specification data.

[0023] The roll parameters may include the original roll radius, roll linear speed, roll upward movement speed, roll Poisson's ratio, and roll elastic modulus.

[0024] The workpiece parameters may include the initial workpiece temperature, workpiece width, and workpiece thickness.

[0025] The rolling process parameters may include the workpiece inlet speed during rolling, the length of the rolling zone with increasing workpiece thickness, the thickness of the thick zone of the workpiece, the thickness of the thin zone, and the friction coefficient between the roll and the workpiece during rolling.

[0026] Step 120: Establish a velocity field that satisfies the velocity boundary conditions according to the deformation characteristics of the workpiece, and calculate the target parameters during the rolling process of increasing the thickness of the metal slab.

[0027] The target parameters may at least include the rolling time corresponding to the rolling process of increasing the thickness of the metal slab, the inclination angle of the rolling zone, the distance of the outlet position of the deformation zone with increasing thickness from the roll center line, the distance of the inlet position of the deformation zone with increasing thickness from the roll center line, and the deformation resistance of the deformation zone.

[0028] When implementing Step 120, it may specifically include: Establish a velocity field and a strain rate field of the rolling deformation zone that satisfy the kinematic admissibility conditions according to the velocity boundary conditions of the deformation zone and the volume invariance condition; Determine the rolling time and the inclination angle of the rolling zone corresponding to the rolling process of increasing the thickness of the metal slab from the roll upward movement speed, the length of the rolling zone with increasing workpiece thickness, the thickness of the thick zone of the workpiece, and the thickness of the thin zone; Calculate the distance of the outlet position of the deformation zone with increasing thickness from the roll center line and the distance of the inlet position of the deformation zone with increasing thickness from the roll center line; Calculate the deformation resistance of the deformation zone of the metal slab according to the workpiece material and the rolling process parameters.

[0029] Step 130: Based on the internal deformation power, friction power, and shear power at any moment during the rolling process of increasing the thickness of the metal slab, obtain the minimum value of the total power functional at any moment, and calculate the rolling force of the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab.

[0030] Step 130 may include: Calculate the internal deformation power, friction power, and shear power at any moment during the rolling process of increasing the thickness of the metal slab according to the deformation resistance; The total power functional is calculated based on the internal deformation power, friction power and shear power; Based on the total power functionals corresponding to different neutral angles, the minimum value of the total power functional at any moment is obtained; Based on the relationship between the total power functional and the rolling force, the rolling force in the deformation zone at any moment during the rolling process of the metal slab with increased thickness is calculated.

[0031] Step 140: Calculate the calculated value of the roll gap during the rolling process of the metal slab with increased thickness according to the roll gap spacing and the rolling force in the deformation zone.

[0032] Figure 1 In the method of, by following the data of the rolling process regulations of the target pass, the roll parameters, workpiece parameters and rolling process parameters are determined; according to the deformation characteristics of the workpiece, a velocity field satisfying the velocity boundary conditions is established, and the target parameters during the rolling process of the metal slab with increased thickness are calculated; based on the internal deformation power, friction power and shear power at any moment during the rolling process of the metal slab with increased thickness, the minimum value of the total power functional at any moment is obtained, and the rolling force in the deformation zone at any moment during the rolling process of the metal slab with increased thickness is calculated; according to the roll gap spacing and the rolling force in the deformation zone, the calculated value of the roll gap during the rolling process of the metal slab with increased thickness is calculated. The solution provided by the present invention mainly aims at the calculation of the roll gap during the rolling process of the metal slab with increased thickness, can calculate the roll gap during the rolling process with increased thickness in real time, while saving production costs and improving production efficiency, well controls the thickness of the rolled piece, and achieves the purpose of improving the calculation accuracy of the roll gap during the rolling process of the metal slab with increased thickness.

[0033] Based on Figure 1 the method of, some specific implementation manners of this method are also provided in the embodiments of this specification, and the following is an explanation.

[0034] Next, in order to further illustrate the specific calculation method in the roll gap calculation process during the rolling process of the metal slab with increased thickness, it is described in combination with Figures 2 - 3 the structural parameters in: Figure 2 is a schematic diagram of the biting zone structure during the rolling process of the metal slab with increased thickness in the embodiment of the present invention; Figure 3 is a quarter schematic diagram of the finished product of the metal slab with increased thickness in the embodiment of the present invention. As shown in Figures 2 - 3 , various parameters are marked in the structure.

[0035] Optionally, according to the velocity boundary conditions and volume invariance conditions in the deformation zone, a velocity field and a strain rate field of the rolling deformation zone satisfying the kinematic admissibility conditions are established, which may specifically include: Adopt formula (1): (1) Calculate the velocity field in the rolling deformation zone; where, is the velocity component in the length direction of the rolled piece, is the inlet velocity of the rolled piece, is a parameter to be determined under different production conditions, is the thickness of the rolled piece, is the thickness of the rolled piece at any position in the deformation zone, is the upward movement velocity of the roll, is the flattened radius of the roll, is the angle between the line connecting the inlet contact point in the rolling deformation zone to the center of the roll and the center line of the rolls at any moment, is the angle between the line connecting any point in the rolling deformation zone to the center of the roll and the center line of the rolls, is the velocity component in the width direction of the rolled piece, is the velocity component in the thickness direction of the rolled piece, , represents the width direction of the rolled piece, represents the thickness direction of the rolled piece; Adopt formula (2): (2) Calculate the strain rate field in the rolling deformation zone; where, is the strain rate component in the length direction of the rolled piece, is the strain rate component in the width direction of the rolled piece, is the strain rate component in the thickness direction of the rolled piece.

[0036] Optionally, determine the rolling time and the inclination angle of the rolling zone corresponding to the process of increasing the thickness of the metal slab by the upward movement velocity of the roll, the length of the rolling zone increased by the thickness of the rolled piece, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece. Specifically include: Substitute the upward movement velocity of the roll, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece into formula (3): (3) Calculate the rolling time corresponding to the process of increasing the thickness of the metal slab; where, is the thickness of the thick zone of the rolled piece, is the thickness of the thin zone of the rolled piece, is the upward movement velocity of the roll; Substitute the length of the rolling zone with increased thickness of the rolled piece, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece into formula (4): (4) Calculate the inclination angle of the rolling zone corresponding to the process of increasing the thickness of the metal slab; where, is the length of the rolling zone with increased thickness of the rolled piece.

[0037] Optionally, calculate the distance by which the exit position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls and the distance by which the entrance position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls. Specifically, it may include: Use formulas (5)-(8): (5) (6) (7) (8) Calculate the distance by which the exit position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls and the distance by which the entrance position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls; where is the distance by which the entrance position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls, is the distance by which the exit position of the thickness-increasing rolling deformation zone deviates from the center line of the rolls, is the thickness at the exit of the deformation zone at any moment, is the thickness of the thin area of the rolled piece, is the upward speed of the rolls, is any moment within the rolling time, is the roll gap spacing, is the flattened radius of the rolls, is the inclination angle of the rolling zone, is the thickness of the rolled piece; The calculating the deformation resistance of the deformation zone of the metal slab according to the material of the rolled piece and the rolling process parameters specifically includes: Use formula (9): ; Calculate the deformation resistance of the deformation zone of the metal slab; where is the deformation resistance of the deformation zone of the metal slab, is T = 1000°C, , is the deformation resistance of the metal at , , , , , are preset material coefficients related to the deformation conditions, is the initial temperature of the rolled piece, is the average deformation speed.

[0038] Optionally, based on the internal deformation power, friction power, and shear power at any moment during the thickness-increasing rolling process of the metal slab, obtain the minimum value of the total power functional at any moment, and calculate the rolling force in the deformation zone during the thickness-increasing rolling process of the metal slab. Specifically, it includes: Adopt formula (10): (10) Calculate the minimum value of the total power functional at any moment; where is the total power functional, is the neutral angle, is the internal deformation power, is the shear power, is the friction power; Adopt formula (11): (11) Calculate the rolling force in the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab, as shown in formula (12): (12) Where is the force arm coefficient, is the linear speed of the roll, is the original radius of the roll, is the velocity component in the width direction of the rolled piece.

[0039] Optionally, according to the roll gap spacing and the rolling force in the deformation zone, calculate the calculated value of the roll gap during the rolling process of increasing the thickness of the metal slab, specifically including: Adopt formula (13): (13) Calculate the calculated value of the roll gap during the rolling process of increasing the thickness of the metal slab; where is the roll gap spacing, is the rolling force in the deformation zone.

[0040] Next, for the foregoing solution, taking the rolling of Q235 carbon structural steel with an increased thickness as an example, specifically illustrate the process of calculating the roll gap by applying the method of the present invention: In step 110, the roll parameters, rolled piece parameters, and rolling process parameters can be respectively: Roll parameters: The original radius of the roll , the linear speed of the roll , the upward movement speed of the roll , the Poisson's ratio of the roll , the elastic modulus of the roll .

[0041] Rolled piece parameters: The initial temperature of the rolled piece , the width of the rolled piece , the thickness of the rolled piece ; Rolling process parameters: The inlet speed of the rolled piece during the rolling process , the length of the rolled piece thickness increase rolling zone 、The thickness of the thick region of the rolled piece 、The thickness of the thin region 、The friction coefficient between the roll and the rolled piece during the rolling process 。

[0042] Figure 4 is a schematic diagram of the change in the thickness of the steel plate over time in the embodiment of the present invention. As Figure 4 shown, the thickness of the steel plate is related to time. Within a certain time range (for example: within 0.5 s to 1.5 s), as the rolling process progresses, the thickness of the steel plate increases uniformly.

[0043] Optionally, in step 120, the values of the relevant parameters are substituted into formulas (3) and (4), and the total rolling time and the rolling zone inclination angle are calculated from the roll upward movement speed, the length of the rolling zone with increased thickness, the thickness of the thick region of the rolled piece, and the thickness of the thin region: ; ; Substitute the parameters into formulas (5)-(8) to calculate the distance of the entrance position of the deformation zone from the roll center line and the distance of the exit position of the deformation zone from the roll center line : ; ; ; ; Substitute the parameters into formula (9) to calculate the deformation resistance of the deformation zone of the metal slab 。

[0044] Optionally, calculate the internal deformation power, friction power, and shear power at any moment during the rolling process respectively, so as to obtain the total power functional, as shown in formula (14): Internal deformation power: (14) Among them, is the deformation resistance of the deformation zone of the metal slab, is the distance of the entrance position of the deformation zone from the roll center line, is the distance of the exit position of the deformation zone from the roll center line, is the width of the rolled piece, is the thickness of the rolled piece at any position in the deformation zone, is the maximum strain rate component in the three directions, is the minimum strain rate component in the three directions.

[0045] The calculation of the shearing power adopts formula (15): (15) Wherein, is the deformation resistance of the metal slab deformation zone, is the thickness of the rolled piece, is the width of the rolled piece, is the thickness at the exit of the deformation zone at any moment, , are the velocity components in the width and thickness directions of the rolled piece respectively, is the distance of the entrance position of the deformation zone from the center line of the roll, is the distance of the exit position of the deformation zone from the center line of the roll. As formula group (16): (16) The calculation of the friction power adopts formula (17): (17) Wherein, , are the velocity components of the tangential discontinuity amount on the contact surface of the rolled piece and the roll in the length and thickness directions respectively, is the roll speed, is the included angle between the line connecting any point in the rolling deformation zone and the roll center and the center line of the roll, is the undetermined parameter under different production conditions, is the thickness of the rolled piece, is the thickness of the rolled piece at any position in the deformation zone, is the upward movement speed of the roll, is the flattened radius of the roll, is the included angle between the line connecting the entrance contact point of the rolling deformation zone and the roll center and the center line of the roll at any moment, is the friction coefficient, is the deformation resistance of the metal slab deformation zone, is the distance of the entrance position of the deformation zone from the center line of the roll, is the distance of the exit position of the deformation zone from the center line of the roll, is the width of the rolled piece.

[0046] Calculate the rolling force in the deformation zone at any moment during the rolling process , and the specific method is as follows: From the minimum value of the total power functional at any moment can be obtained.

[0047] Wherein, is the total power functional, is the neutral angle, is the internal deformation power, is the shearing power, is the frictional power.

[0048] ; ; Calculate the calculated value of the roll gap during the rolling process with an increase in the thickness of the metal slab : ; Through the convergence condition between the flattened radius of the roll and the rolling force, perform iterative calculations to obtain the rolling force that meets the change conditions. The specific method is: ; ; Among them, is the flattened radius of the roll, is the original radius of the roll, is the Poisson's ratio of the roll, is the elastic modulus of the roll, is the width of the rolled piece, is the thickness of the rolled piece, is the thickness at the exit of the deformation zone at any moment, is the th iteration of the roll radius, is the th iteration of the roll radius.

[0049] The calculation process of the roll gap in the specific embodiments of the present invention described above, the comparison between the calculated rolling force and the measured value is as Figure 5 shown, and the error is within 7%. The comparison between the roll gap calculated by the method of the present invention and the measured value is as Figure 6 shown, and the error is within 1%. Therefore, the technical solution provided by the present invention is accurately calculated and can calculate the roll gap during the rolling process with an increase in thickness in real time; while saving production costs and improving production efficiency, it can well control the thickness of the rolled piece. The technical solution of the present invention obtains a calculated value of the roll gap that is closer to the experimental measured value by establishing a tangential velocity field for the rolling process with an increase in the thickness of the metal slab. On the basis of comprehensively considering various process parameters, the purpose of improving the calculation accuracy of the roll gap during the rolling process with an increase in the thickness of the metal slab is achieved.

[0050] Based on the same idea, the present invention also provides a device for calculating the roll gap during the rolling process with an increase in the thickness of the metal slab, as Figure 7 shown, the device may include: The first parameter determination module 710 is used to determine the roll parameters, rolled piece parameters, and rolling process parameters according to the rolling process specification data of the target pass; The second parameter determination module 720 is configured to establish a velocity field that satisfies the velocity boundary conditions according to the deformation characteristics of the rolled piece, and calculate the target parameters in the rolling process of increasing the thickness of the metal slab; the target parameters at least include the rolling time corresponding to the rolling process of increasing the thickness of the metal slab, the inclination angle of the rolling zone, the distance of the outlet position of the thickness-increasing rolling deformation zone deviating from the roll center line, the distance of the inlet position of the thickness-increasing rolling deformation zone deviating from the roll center line, and the deformation resistance of the deformation zone. The rolling force determination module 730 in the deformation zone is configured to obtain the minimum value of the total power functional at any moment based on the internal deformation power, friction power, and shear power at any moment in the rolling process of increasing the thickness of the metal slab, and calculate the rolling force in the deformation zone at any moment in the rolling process of increasing the thickness of the metal slab. The roll gap calculation module 740 is configured to calculate the roll gap calculated value in the rolling process of increasing the thickness of the metal slab according to the roll gap spacing and the rolling force in the deformation zone.

[0051] Based on Figure 7 the device in, some specific implementation units may further be included: Optionally, the second parameter determination module 720 may specifically include: The deformation zone velocity field and strain rate field calculation unit is configured to establish the velocity field and strain rate field of the rolling deformation zone that satisfy the kinematic admissibility conditions according to the velocity boundary conditions of the deformation zone and the volume invariance condition. The rolling time and rolling zone inclination angle calculation unit is configured to determine the rolling time and rolling zone inclination angle corresponding to the rolling process of increasing the thickness of the metal slab from the upward movement speed of the roll, the length of the thickness-increasing rolling zone of the rolled piece, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece. The distance calculation unit is configured to calculate the distance of the outlet position of the thickness-increasing rolling deformation zone deviating from the roll center line and the distance of the inlet position of the thickness-increasing rolling deformation zone deviating from the roll center line. The deformation resistance calculation unit is configured to calculate the deformation resistance of the deformation zone of the metal slab according to the rolled piece material and rolling process parameters.

[0052] The rolling force determination module 730 in the deformation zone may specifically include: The internal deformation power, friction power, and shear power calculation unit is configured to calculate the internal deformation power, friction power, and shear power at any moment in the rolling process of increasing the thickness of the metal slab according to the deformation resistance. The total power functional calculation unit is configured to calculate the total power functional according to the internal deformation power, friction power, and shear power. The minimum value calculation unit of the total power functional is configured to obtain the minimum value of the total power functional at any moment according to the total power functional corresponding to different neutral angles. The rolling force calculation unit in the deformation zone is used to calculate the rolling force in the deformation zone at any moment during the rolling process of the metal slab with an increased thickness according to the relationship between the total power functional and the rolling force.

[0053] Optionally, the velocity field and strain rate field calculation unit in the deformation zone can specifically be used for: Using the formula: ; Calculating the velocity field of the rolling deformation zone; where is the velocity component in the length direction of the rolled piece, is the inlet velocity of the rolled piece, is the undetermined parameter under different production conditions, is the thickness of the rolled piece, is the thickness of the rolled piece at any position in the deformation zone, is the upward movement speed of the roll, is the flattened radius of the roll, is the angle between the line connecting the inlet contact point of the rolling deformation zone to the roll center and the center line of the rolls at any moment, is the angle between the line connecting any point in the rolling deformation zone to the roll center and the center line of the rolls, is the velocity component in the width direction of the rolled piece, is the velocity component in the thickness direction of the rolled piece, , represents the width direction of the rolled piece, represents the thickness direction of the rolled piece; Using the formula: ; Calculating the strain rate field of the rolling deformation zone; where is the strain rate component in the length direction of the rolled piece, is the strain rate component in the width direction of the rolled piece, is the strain rate component in the thickness direction of the rolled piece.

[0054] Optionally, the rolling time and rolling zone inclination calculation unit can specifically be used for: Substituting the upward movement speed of the roll, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece into the formula: ; Calculating the rolling time corresponding to the rolling process of the metal slab with an increased thickness; where is the thickness of the thick zone of the rolled piece, is the thickness of the thin zone of the rolled piece, is the upward movement speed of the roll; Substituting the length of the rolling zone with an increased thickness of the rolled piece, the thickness of the thick zone of the rolled piece, and the thickness of the thin zone of the rolled piece into the formula: ; Calculate the rolling zone inclination angle corresponding to the rolling process with an increase in the thickness of the metal slab; where, is the length of the rolling zone with an increase in the thickness of the rolled piece.

[0055] Optionally, the distance calculation unit can specifically be used for: Using the formula: ; ; ; ; Calculate the distance by which the outlet position of the rolling deformation zone with an increase in thickness deviates from the center line of the rolls and the distance by which the inlet position of the rolling deformation zone with an increase in thickness deviates from the center line of the rolls; where, is the distance by which the inlet position of the rolling deformation zone with an increase in thickness deviates from the center line of the rolls, is the distance by which the outlet position of the rolling deformation zone with an increase in thickness deviates from the center line of the rolls, is the thickness at the outlet of the deformation zone at any moment, is the thickness of the thin zone of the rolled piece, is the upward movement speed of the rolls, is any moment within the rolling time, is the roll gap spacing, is the flattening radius of the rolls, is the rolling zone inclination angle, is the thickness of the rolled piece; The deformation resistance calculation unit can specifically be used for: Using the formula: ; Calculate the deformation resistance of the deformation zone of the metal slab; where, is the deformation resistance of the deformation zone of the metal slab, is T = 1000 °C, , is the deformation resistance of the metal at , , , , , are preset material coefficients related to the deformation conditions, is the initial temperature of the rolled piece, is the average deformation speed.

[0056] Optionally, the rolling force determination module 730 in the deformation zone can specifically be used for: Using the formula: ; Calculate the minimum value of the total power functional at any time; where, is the total power functional, is the neutral angle, is the internal deformation power, is the shear power, is the friction power; Using the formula: ; Calculate the rolling force in the deformation zone at any time during the rolling process of the metal slab thickness increase; ; in, is the force arm coefficient, is the roller linear speed, is the original radius of the roller, is the velocity component in the width direction of the rolled piece.

[0057] Optionally, the roll gap calculation module 740 may be specifically used for: Using the formula: ; Calculate the thickness of the metal slab by adding the roll gap calculation value during the rolling process; where, is the gap between the rollers, is the rolling force in the deformation zone.

[0058] Based on the same idea, the embodiment of this specification also provides a device for calculating the roll gap during the thickness increase rolling process of a metal slab. Figure 8 As shown, it may include: 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, the aforementioned method for calculating the roll gap during the thickness increase rolling process of the metal slab is executed. Figure 8 As shown, the terminal device may further include a communication line. The communication line may include a path to transmit information between the components. 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.

[0059] In a specific implementation, as an example, Figure 8 As shown, the processor may include one or more CPUs, such as Figure 8 In the specific implementation, as an example, Figure 8 As shown, the terminal device may include multiple processors, such asFigure 8 The processors in

[0060] The above mainly introduces the solution provided by the embodiments of the present invention from the perspective of the interaction between various modules. It can be understood that, in order to implement the above functions, each of the modules includes the corresponding hardware structure and / or software unit for executing each function. Those skilled in the art should easily 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 certain function is executed in the way of hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described function for each specific application, but such implementation should not be considered to exceed the scope of the present invention. In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present invention are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a terminal, a user device, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that the computer can access, or a data storage device such as a server or data center integrating one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc (DVD); or it can be a semiconductor medium, such as a solid state drive (SSD).

[0061] Although the present invention has been described in connection with various embodiments, those skilled in the art will recognize other variations of the disclosed embodiments while practicing the claimed invention, by studying the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. A single processor or other unit may implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not indicate that these measures cannot be combined to produce advantageous results.

[0062] Although the invention has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the invention. Accordingly, the specification and drawings are merely exemplary illustrations of the invention as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. Method for calculating roll gap during the rolling process of increasing the thickness of a metal slab, characterized in that the method Including: Determine the roll parameters, workpiece parameters, and rolling process parameters according to the rolling process specification data of the target pass; According to the deformation characteristics of the workpiece, establish a velocity field that satisfies the velocity boundary conditions, and calculate the target parameters during the rolling process of increasing the thickness of the metal slab; the target parameters at least include the rolling time, rolling zone inclination angle, distance of the exit position of the thickness-increasing rolling deformation zone from the roll center line, distance of the entrance position of the thickness-increasing rolling deformation zone from the roll center line, and deformation resistance of the deformation zone during the rolling process of increasing the thickness of the metal slab; Based on the internal deformation power, friction power, and shear power at any moment during the rolling process of increasing the thickness of the metal slab, obtain the minimum value of the total power functional at any moment, and calculate the rolling force of the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab; Calculate the calculated value of the roll gap during the rolling process of increasing the thickness of the metal slab according to the roll gap spacing and the rolling force of the deformation zone.

2. The roll gap calculation method for the rolling process of increasing the thickness of the metal slab according to claim 1, wherein, According to the deformation characteristics of the workpiece, establish a velocity field that satisfies the velocity boundary conditions, and calculate the target parameters during the rolling process of increasing the thickness of the metal slab, specifically including: Establish a velocity field and strain rate field of the rolling deformation zone that satisfy the kinematic admissibility conditions according to the velocity boundary conditions of the deformation zone and the volume invariance condition; Determine the rolling time and rolling zone inclination angle corresponding to the rolling process of increasing the thickness of the metal slab from the roll upward movement speed, the length of the thickness-increasing rolling zone of the workpiece, the thickness of the thick zone of the workpiece, and the thickness of the thin zone of the workpiece; Calculate the distance of the exit position of the thickness-increasing rolling deformation zone from the roll center line and the distance of the entrance position of the thickness-increasing rolling deformation zone from the roll center line; Calculate the deformation resistance of the deformation zone of the metal slab according to the workpiece material and rolling process parameters.

3. The roll gap calculation method for the rolling process of increasing the thickness of the metal slab according to claim 1, wherein Based on the internal deformation power, friction power, and shear power at any moment during the rolling process of increasing the thickness of the metal slab, obtain the minimum value of the total power functional at any moment, and calculate the rolling force of the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab, specifically including: Calculate the internal deformation power, friction power, and shear power at any moment during the rolling process of increasing the thickness of the metal slab according to the deformation resistance; Calculate the total power functional according to the internal deformation power, friction power, and shear power; Obtain the minimum value of the total power functional at any moment according to the total power functional corresponding to different neutral angles; Calculate the rolling force of the deformation zone at any moment during the rolling process of increasing the thickness of the metal slab according to the relationship between the total power functional and the rolling force.

4. The method for calculating the roll gap in the rolling process of increasing the thickness of the metal slab according to claim 2, characterized in that, Establish a velocity field and strain rate field of the rolling deformation zone that satisfy the kinematic admissibility conditions according to the velocity boundary conditions of the deformation zone and the volume invariance condition, specifically including: Adopt the formula: ； Calculate the velocity field in the rolling deformation zone; among them, is the velocity component in the length direction of the rolled piece, is the entry velocity of the rolled piece, is a parameter to be determined under different production conditions, is the thickness of the rolled piece, is the thickness of the rolled piece at any position in the deformation zone, is the upward movement speed of the roll, is the flattened radius of the roll, is the angle between the line connecting the entry contact point in the rolling deformation zone to the roll center and the center line of the rolls at any moment, is the angle between the line connecting any point in the rolling deformation zone to the roll center and the center line of the rolls, is the velocity component in the width direction of the rolled piece, is the velocity component in the thickness direction of the rolled piece, , represents the width direction of the rolled piece, represents the thickness direction of the rolled piece; Adopt the formula: ； Calculate the strain rate field in the rolling deformation zone; where, is the strain rate component in the length direction of the rolled piece, is the strain rate component in the width direction of the rolled piece, is the strain rate component in the thickness direction of the rolled piece.

5. The method for calculating the roll gap in the rolling process of increasing the thickness of a metal slab according to claim 2, characterized in that, Determine the rolling time and rolling zone inclination angle corresponding to the rolling process of increasing the thickness of the metal slab from the roll upward movement speed, the length of the thickness-increasing rolling zone of the workpiece, the thickness of the thick zone of the workpiece, and the thickness of the thin zone of the workpiece, specifically including: Substitute the roll upward movement speed, the thickness of the thick zone of the workpiece, and the thickness of the thin zone of the workpiece into the formula: ； Calculate the rolling time corresponding to the rolling process with an increase in the thickness of the metal slab; among them, is the thickness of the thick zone of the rolled piece, is the thickness of the thin zone of the rolled piece, is the upward movement speed of the roll; Substitute the length of the thickness-increasing rolling zone of the workpiece, the thickness of the thick zone of the workpiece, and the thickness of the thin zone of the workpiece into the formula: ； Calculate the inclination angle of the rolling zone corresponding to the rolling process with an increase in the thickness of the metal slab; among them, is the length of the rolling zone with an increase in the thickness of the rolled piece.

6. The roll gap calculation method for the rolling process of increasing the thickness of a metal slab according to claim 2, characterized in that, Calculate the distance of the exit position of the thickness-increasing rolling deformation zone from the roll center line and the distance of the entrance position of the thickness-increasing rolling deformation zone from the roll center line, specifically including: Adopt the formula: ； ； ； ； Calculate the distance by which the exit position of the rolling deformation zone with increased thickness deviates from the center line of the rolls and the distance by which the entry position of the rolling deformation zone with increased thickness deviates from the center line of the rolls; where, is the distance by which the entry position of the rolling deformation zone with increased thickness deviates from the center line of the rolls, is the distance by which the exit position of the rolling deformation zone with increased thickness deviates from the center line of the rolls, is the exit thickness of the deformation zone at any moment, is the thickness of the thin zone of the rolled piece, is the upward movement speed of the rolls, is any moment within the rolling time, is the roll gap spacing, is the flattened radius of the rolls, is the inclination angle of the rolling zone, is the thickness of the rolled piece; Calculate the deformation resistance of the deformation zone of the metal slab according to the material of the rolled piece and the rolling process parameters, specifically including: Adopt the formula: ； Calculate the deformation resistance of the metal slab deformation zone; where, is the deformation resistance of the metal slab deformation zone, is T = 1000 °C, , is the deformation resistance of the metal at , , , , , are preset material coefficients related to the deformation conditions, is the initial temperature of the rolled piece, is the average deformation speed.

7. The roll gap calculation method for the rolling process of increasing the thickness of a metal slab according to claim 6, characterized in that, Based on the internal deformation power, friction power and shear power at any moment during the rolling process with the increase of the metal slab thickness, obtain the minimum value of the total power functional at any moment, and calculate the rolling force of the deformation zone at any moment during the rolling process with the increase of the metal slab thickness, specifically including: Adopt the formula: ； Calculate the minimum value of the total power functional at any time; where, is the total power functional, is the neutral angle, is the internal deformation power, is the shear power, is the friction power; Adopt the formula: ； Calculate the rolling force of the deformation zone at any moment during the rolling process with the increase of the metal slab thickness; ； Among them, is the arm coefficient, is the linear speed of the roll, is the original radius of the roll, is the velocity component in the width direction of the rolled piece.

8. The roll gap calculation method for the rolling process of increasing the thickness of a metal slab according to claim 7, characterized in that, According to the roll gap spacing and the rolling force of the deformation zone, calculate the calculated value of the roll gap during the rolling process with the increase of the metal slab thickness, specifically including: Adopt the formula: ； Calculate the calculated value of the roll gap during the rolling process of increasing the thickness of the metal slab; among them, is the roll gap spacing of the rolling mill, is the rolling force in the deformation zone, is the stiffness of the rolling mill.

9. A roll gap calculation device for the rolling process of increasing the thickness of a metal slab, characterized in that, The device includes: The first parameter determination module is used to determine the roll parameters, rolled piece parameters and rolling process parameters according to the rolling process specification data of the target pass; The second parameter determination module is used to establish a velocity field that satisfies the velocity boundary conditions according to the deformation characteristics of the rolled piece, and calculate the target parameters during the rolling process with the increase of the metal slab thickness; the target parameters at least include the rolling time corresponding to the rolling process with the increase of the metal slab thickness, the inclination angle of the rolling zone, the distance of the outlet position of the deformation zone with thickness increase from the roll center line, the distance of the inlet position of the deformation zone with thickness increase from the roll center line, and the deformation resistance of the deformation zone; The deformation zone rolling force determination module is used to obtain the minimum value of the total power functional at any moment based on the internal deformation power, friction power and shear power at any moment during the rolling process with the increase of the metal slab thickness, and calculate the rolling force of the deformation zone at any moment during the rolling process with the increase of the metal slab thickness; The roll gap calculation module is used to calculate the calculated value of the roll gap during the rolling process with the increase of the metal slab thickness according to the roll gap spacing and the rolling force of the deformation zone.

10. Roll gap calculation equipment for the rolling process of increasing the thickness of metal slabs, characterized in that the equipment Include: A memory, a processor and a communication interface coupled to the processor; A computer program that can be run by the processor is stored on the memory; When the processor runs the computer program, it executes the roll gap calculation method for the rolling process with the increase of the metal slab thickness according to any one of claims 1 to 8.

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