Method and device for determining rolling force during flat rolling of corrugated composite plate

Abstract

The present invention discloses a method and device for determining rolling force during the flat-roll rolling process of a corrugated composite plate, relating to the technical field of rolling, so as to solve the problem of low accuracy in calculating the rolling force during the rolling process of the existing corrugated composite plate. The method includes determining the second rolling parameters during the flat-roll rolling process; partitioning the first state deformation zone based on the first neutral point to obtain a first region set and determining the first total rolling force; partitioning the second state deformation zone based on the second neutral point to obtain a second region set and determining the second total rolling force; and determining the target rolling force during the flat-roll rolling process based on the first total rolling force and the second total rolling force. The method for determining the rolling force during the flat-roll rolling process of the corrugated composite plate provided by the present invention improves the accuracy of the rolling force by calculating the rolling force by dividing the state of the rolling deformation zone into two states.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling, and particularly to a method and device for determining rolling force during the flat-roll rolling process of corrugated composite plates. Background Art

[0002] Metal composite plates are composite materials that combine two or more metals, and have advantages such as high strength, corrosion resistance, and good electrical and thermal conductivity. They are widely used in important fields such as automobiles, aerospace, and military industries. In recent years, a kind of corrugated plate prepared by the corrugated rolling process has attracted a lot of attention due to its good quality and high bonding strength. In the rolling process, the "upper roll is a corrugated roll + the lower roll is a flat roll" method is used in the first pass to obtain a corrugated composite plate, and in the second pass and subsequent passes, the upper and lower rolls are both flat rolls to flatten the corrugated surface of the corrugated composite plate, and the obtained composite flat plate can be applied in practice. Due to the complexity of the shape of the initial corrugated plate, it will increase the deformation difficulty of each layer of metal during the rolling process and require higher performance of the rolling mill. In order to obtain a composite flat plate with excellent performance and flat shape, the determination of rolling force is an essential link. The determination of rolling force can provide a basis for the roll gap setting and shape control during the rolling process, and can also guide the design and selection of the bearing capacity and strength check of the equipment, which is of great significance for extending the service life of the equipment and ensuring safe production.

[0003] Currently, the determination of rolling force during the rolling process of existing corrugated composite plates is to establish a relevant mathematical model for the corrugated rolling process to obtain the rolling force, and the obtained is the corrugated composite plate, which cannot be applied to the flat-roll rolling process. Moreover, the existing methods for determining rolling force usually partition the rolling deformation zone in one state and calculate the rolling force, and one state cannot truly reflect the flat-roll rolling process of the corrugated composite plate, so the accuracy of the obtained rolling force is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and device for determining rolling force during the flat-roll rolling process of corrugated composite plates, and improve the accuracy of rolling force by calculating the rolling force by dividing the state of the rolling deformation area into two states.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] In the first aspect, the present invention provides a method for determining rolling force during the flat-roll rolling process of corrugated composite plates, including:

[0007] Determine the second rolling parameters during the flat-roll rolling process; the second rolling parameters include reduction, contact arc length, and shear yield stress parameter; the second rolling parameters are calculated from the first rolling parameters during the flat-roll rolling process of the corrugated composite plate;

[0008] Partition the first state deformation zone based on the first neutral point to obtain a first set of regions, and determine the first total rolling force based on the first rolling parameters, the second rolling parameters, and the first set of regions; the first state deformation zone is the rolling deformation zone in the state where the upper roll is in full contact with the upper surface of the corrugated composite plate.

[0009] Partition the second state deformation zone based on the second neutral point to obtain a second set of regions, and determine the second total rolling force based on the first rolling parameters, the second rolling parameters, and the second set of regions; the second state deformation zone is the rolling deformation zone in the state where the upper roll is not in full contact with the upper surface of the corrugated composite plate.

[0010] Determine the target rolling force during the flat roll rolling process based on the first total rolling force and the second total rolling force.

[0011] Optionally, the partitioning the first state deformation zone based on the first neutral point to obtain a first set of regions, and determining the first total rolling force based on the first rolling parameters, the second rolling parameters, and the first set of regions includes:

[0012] Partition the first state deformation zone with the perpendicular line where the first neutral point is located as the first dividing line to obtain a first set of regions, and the first set of regions includes a first complete region and a second complete region;

[0013] According to the first rolling parameters and the second rolling parameters, use the formula:

[0014] ;

[0015] Calculate the first complete rolling force of the first complete region;

[0016] Wherein, , is the first complete rolling force, is the contact friction coefficient between the base metal and the lower roll, is the equivalent yield shear stress, is the contact friction coefficient between the clad metal and the upper roll, is the reduction, is the corrugation amplitude, is the roll radius, is the abscissa of any point position in the rolling deformation zone, is the thickness of the clad metal of the composite plate, is the thickness of the base metal of the composite plate;

[0017] According to the first rolling parameters and the second rolling parameters, use the formula:

[0018] ;

[0019] Calculate the second complete rolling force of the second complete region;

[0020] Wherein, , is the second complete rolling force; is the contact arc length, is the post-entry back tension;

[0021] Based on the first boundary condition, the first complete rolling force, and the second complete rolling force, determine the abscissa of the first neutral point; the first boundary condition is that the rolling forces at the first dividing line of the first complete region and the second complete region are equal;

[0022] Based on the abscissa of the first neutral point, perform integral solution on the first complete rolling force and the second complete rolling force to obtain the total rolling force of the first state deformation zone.

[0023] Optionally, the performing integral solution on the first complete rolling force and the second complete rolling force based on the abscissa of the first neutral point to obtain the total rolling force of the first state deformation zone includes:

[0024] Use the formula:

[0025] ;

[0026] Calculate the total rolling force of the first state deformation zone;

[0027] Wherein, is the total rolling force of the first state, is the width of the corrugated composite plate, is the abscissa of the first neutral point.

[0028] Optionally, the partitioning the second state deformation zone based on the second neutral point to obtain a second region set, and determining the second total rolling force based on the first rolling parameter, the second rolling parameter, and the second region set includes:

[0029] Determine the target shape parameter, the abscissa of the first characteristic point, and the abscissa of the second characteristic point of the second state deformation zone according to the first rolling parameter and the second rolling parameter; the first characteristic point is the intersection point of the corrugated composite plate and the upper roll in the second state deformation zone, and the second characteristic point is the trough point of the corrugated composite plate in the second state deformation zone;

[0030] Taking the perpendicular line where the second neutral point is located as the second dividing line, the perpendicular line where the first characteristic point is located as the third dividing line, and the perpendicular line where the second characteristic point is located as the fourth dividing line to divide the second state deformation area, a second area set is obtained, and the second area set includes a first incomplete area, a second incomplete area, a third incomplete area, and a fourth incomplete area;

[0031] Based on the target shape parameters, the abscissa of the first characteristic point, the abscissa of the second characteristic point, the first rolling parameter, and the second rolling parameter, calculate the first incomplete rolling force of the first incomplete area, the second incomplete rolling force of the second incomplete area, the third incomplete rolling force of the third incomplete area, and the fourth incomplete rolling force of the fourth incomplete area;

[0032] Determine the abscissa of the second neutral point according to the fourth boundary condition, the first incomplete rolling force, and the second incomplete rolling force; the fourth boundary condition is that the rolling forces of the first incomplete area and the second incomplete area are equal at the second dividing line;

[0033] Based on the abscissa of the second neutral point, perform integral solution on the first incomplete rolling force, the second incomplete rolling force, the third incomplete rolling force, and the fourth incomplete rolling force to obtain the second total rolling force of the second state deformation area.

[0034] Optionally, the target shape parameters include a first shape parameter, a second shape parameter, a third shape parameter, and a fourth shape parameter; the calculating the first incomplete rolling force of the first incomplete area, the second incomplete rolling force of the second incomplete area, the third incomplete rolling force of the third incomplete area, and the fourth incomplete rolling force of the fourth incomplete area based on the target shape parameters, the abscissa of the first characteristic point, the abscissa of the second characteristic point, the first rolling parameter, and the second rolling parameter includes:

[0035] According to the target shape parameters, the first rolling parameter, and the second rolling parameter, using the formula:

[0036] ;

[0037] Calculate the fourth incomplete rolling force of the fourth incomplete area;

[0038] where ;

[0039] ;

[0040] ;

[0041] ;

[0042] ;

[0043] is the third shape parameter, is the fourth shape parameter, is the fourth incomplete rolling force;

[0044] Based on the second boundary condition, the target shape parameter, the abscissa of the second characteristic point, the first rolling parameter, the second rolling parameter, and the fourth incomplete rolling force, use the formula:

[0045] ;

[0046] Calculate the third incomplete rolling force of the third incomplete area; the second boundary condition is that the rolling forces at the fourth dividing line of the fourth incomplete area and the third incomplete area are equal;

[0047] Among them, ;

[0048] is the abscissa of the second characteristic point, is the third incomplete rolling force, is the first shape parameter, is the second shape parameter;

[0049] Based on the third boundary condition, the target shape parameter, the abscissa of the first characteristic point, the first rolling parameter, the second rolling parameter, and the third incomplete rolling force, use the formula:

[0050] ;

[0051] Calculate the second incomplete rolling force of the second incomplete area; the third boundary condition is that the rolling forces at the third dividing line of the third incomplete area and the second incomplete area are equal;

[0052] Among them, ;

[0053] is the second incomplete rolling force;

[0054] According to the first rolling parameter and the second rolling parameter, use the formula:

[0055] ;

[0056] Calculate the first incomplete rolling force of the first incomplete area;

[0057] Among them, , is the front tension before the exit, is the first incomplete rolling force.

[0058] Optionally, integrating and solving the first incomplete rolling force, the second incomplete rolling force, the third incomplete rolling force, and the fourth incomplete rolling force based on the abscissa of the second neutral point to obtain the second total rolling force in the second state deformation zone includes:

[0059] Using the formula:

[0060] ;

[0061] Calculating to obtain the second total rolling force in the second state deformation zone;

[0062] Wherein, is the second total rolling force, is the abscissa of the second neutral point.

[0063] Optionally, determining the target shape parameter, the abscissa of the first characteristic point, and the abscissa of the second characteristic point in the second state deformation zone according to the first rolling parameter and the second rolling parameter includes:

[0064] According to the first rolling parameter, using the formula:

[0065] ;

[0066] Calculating to obtain the first shape parameter;

[0067] Wherein, is the number of corrugations, >0, is the equivalent radius of the corrugated roll;

[0068] According to the first rolling parameter and the second rolling parameter, using the formula:

[0069] ;

[0070] Calculating to obtain the second shape parameter;

[0071] Wherein, is the thickness of the clad metal of the corrugated composite plate, is the thickness of the base metal of the corrugated composite plate;

[0072] According to the first rolling parameter, using the formula:

[0073] ;

[0074] Calculating to obtain the third shape parameter;

[0075] According to the first rolling parameter and the second rolling parameter, using the formula:

[0076] ;

[0077] Calculate the fourth shape parameter;

[0078] According to the first rolling parameter, the second rolling parameter, the third shape parameter, and the fourth shape parameter, use the formula:

[0079] ;

[0080] Calculate the abscissa of the first characteristic point;

[0081] According to the first rolling parameter and the second rolling parameter, use the formula:

[0082] ;

[0083] Calculate the abscissa of the second characteristic point;

[0084] Wherein, is the abscissa of the first characteristic point, is the abscissa of the second characteristic point.

[0085] Optionally, the determining the target rolling force during the flat roll rolling based on the first total rolling force and the second total rolling force includes:

[0086] Sort the first total rolling force and the second total rolling force according to a preset rule to obtain the target rolling force; the target rolling force is the first total rolling force and the second total rolling force arranged alternately.

[0087] Optionally, the determining the abscissa of the first neutral point based on the first boundary condition, the first complete rolling force, and the second complete rolling force includes:

[0088] For the formula:

[0089] ;

[0090] Solve to obtain the abscissa of the first neutral point.

[0091] In a second aspect, the present invention provides a device for determining the rolling force during the flat roll rolling of a corrugated composite plate, including:

[0092] A second rolling parameter determination module, configured to determine the second rolling parameter during the flat roll rolling; the second rolling parameter includes the reduction, the contact arc length, and the shear yield stress parameter; the second rolling parameter is calculated from the first rolling parameter during the flat roll rolling of the corrugated composite plate;

[0093] The total rolling force calculation module for the first state deformation zone is used to partition the first state deformation zone based on the first neutral point to obtain the first region set, and determine the first total rolling force based on the first rolling parameters, the second rolling parameters, and the first region set; the first state deformation zone is the rolling deformation zone in the state where the upper roll is in full contact with the upper surface of the corrugated composite plate;

[0094] The total rolling force calculation module for the second state deformation zone partitions the second state deformation zone based on the second neutral point to obtain the second region set, and determines the second total rolling force based on the first rolling parameters, the second rolling parameters, and the second region set; the second state deformation zone is the rolling deformation zone in the state where the upper roll is not in full contact with the upper surface of the corrugated composite plate;

[0095] The target rolling force determination module is used to determine the target rolling force in the flat roll rolling process based on the first total rolling force and the second total rolling force.

[0096] The technical effect of a method for determining the rolling force in the flat roll rolling process of a corrugated composite plate is as follows: The second rolling parameters determined in this method for the flat roll rolling process of the corrugated composite plate can be used to predict the rolling force in the flat roll rolling process of the corrugated composite plate. The first state deformation zone is partitioned based on the first neutral point to obtain the first region set, and the first total rolling force is determined based on the first rolling parameters, the second rolling parameters, and the first region set; the second state deformation zone is partitioned based on the second neutral point to obtain the second region set, and the second total rolling force is determined based on the first rolling parameters, the second rolling parameters, and the second region set; the target rolling force in the flat roll rolling process is determined based on the first total rolling force and the second total rolling force. Considering that there are two states in the rolling deformation zone of the flat roll rolling process, the rolling forces in the two states are calculated respectively, and the target rolling force is determined based on the rolling forces in the two states, so the calculated rolling force is more accurate.

[0097] The technical effect of a device for determining the rolling force in the flat roll rolling process of a corrugated composite plate is as follows: The rolling parameters obtained by this device for the flat roll rolling process of the corrugated composite plate can be used to predict the rolling force in the flat roll rolling process of the corrugated composite plate. In addition, this device considers that there are two states in the rolling deformation zone of the flat roll rolling process, calculates the rolling forces in the two states respectively, and determines the target rolling force based on the rolling forces in the two states, so the calculated rolling force is more accurate. Description of the Drawings

[0098] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0099] Figure 1 Flow chart of a method for determining rolling force during flat rolling of a corrugated composite plate provided by the present invention;

[0100] Figure 2 Schematic diagrams of the corrugated composite plate and the composite flat plate provided by the present invention;

[0101] Figure 3 Schematic diagram of flat rolling of a corrugated composite plate provided by the present invention;

[0102] Figure 4 Schematic diagram of the rolling deformation zone in a fully - contacted state provided by the present invention;

[0103] Figure 5 Schematic diagram of the rolling deformation zone in an incompletely - contacted state provided by the present invention;

[0104] Figure 6 Comparison chart of the model prediction value and the experimental value provided by the present invention;

[0105] Figure 7 Schematic structural diagram of a device for determining rolling force during flat rolling of a corrugated composite plate provided by the present invention.

[0106] Reference numerals:

[0107] 1 - clad layer, 2 - base layer. Detailed implementation manners

[0108] In order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, terms such as "first" and "second" are used to distinguish the same items 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 the terms "first" and "second" do not limit the quantity and execution order, and the terms "first" and "second" do not necessarily limit being different.

[0109] 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 solution described as "exemplary" or "for example" in the present invention should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific way.

[0110] In the present invention, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the relationship between associated objects and indicates that there can be three relationships. For example, A and / or B can represent the cases of A existing alone, A and B existing simultaneously, and B existing 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 a similar expression refers to any combination of these items, including any combination of single item or plural 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.

[0111] Currently, there is relatively little research on the rolling force during the flat roll rolling process of corrugated composite plates. The determination of the rolling force mainly uses the experimental method and the finite element method. The experimental method mainly uses a force sensor to collect the rolling force during the rolling process and outputs it through a signal output device. The entire process involves many operating devices, is cumbersome, time-consuming, and is easily affected by external environmental factors. The finite element method mainly establishes an assembly model of the entire rolling process, processes it through software operations, and manually extracts the stable rolling force during the rolling process. The simulation time during the entire rolling process is long, and the data extraction process is complex. In addition, both methods can only conduct single process plan experiments or simulations, with low efficiency, high labor costs, and are not convenient for engineering applications.

[0112] In addition, in addition to the above two methods, other calculations of the rolling force usually establish relevant mathematical models for the corrugated rolling process to obtain the rolling force, and the obtained is the corrugated composite plate. However, in actual applications, what is needed is a composite flat plate. Then, it is necessary to roll the prepared corrugated composite plate flat through the flat roll rolling process. Currently, there is a lack of a method for predicting the rolling force during the flat roll rolling process to guide the preparation of the composite flat plate. Therefore, there is an urgent need for a method that is time-consuming, convenient to calculate, efficient, and low-cost for predicting the rolling force during the flat roll rolling process of corrugated composite plates.

[0113] To solve the above problems, the present invention provides a method and device for determining the rolling force during the flat roll rolling process of corrugated composite plates, which will be described below with reference to the accompanying drawings.

[0114] See Figure 1 , a method for determining the rolling force during the flat roll rolling process of corrugated composite plates provided by the present invention includes the following steps:

[0115] Step 110: Determine the second rolling parameters during the flat roll rolling process;

[0116] The second rolling parameters include the reduction and the contact arc length and a shear yield stress parameter, which includes the shear yield stress of the clad metal of the corrugated composite plate , the shear yield stress of the base metal of the corrugated composite plate and the equivalent yield shear stress during the rolling process ; the second rolling parameter is calculated from the first rolling parameter during the flat rolling process of the corrugated composite plate; the first rolling parameter is a process parameter obtained during the rolling process, including the thickness of the clad metal of the corrugated composite plate , the thickness of the base metal of the corrugated composite plate , the width of the corrugated composite plate , the roll radii of the upper and lower rolls during the flat rolling process , the contact friction coefficient between the clad metal and the upper roll during the rolling process , the contact friction coefficient between the base metal and the lower roll , the front tension before the exit , the back tension after the entrance , the thickness of the clad metal of the composite flat plate after the rolling ends and the thickness of the base metal , the number of corrugations of the corrugated roll during the corrugated rolling process , the corrugation amplitude , the equivalent radius of the corrugated roll .

[0117] As Figure 2 shown, during the rolling process of the corrugated composite plate, in the first pass, the upper roll is a corrugated roll and the lower roll is a flat roll. After rolling, a corrugated composite plate is obtained. At this time, the upper surface of the clad layer 1 is corrugated, and the contact surface between the base layer 2 and the clad layer 1 is also corrugated. By flat rolling, the corrugated surface of the clad layer 1 is rolled flat to obtain a composite flat plate. At this time, the upper surface of the clad layer 1 is a flat straight surface. As Figure 3 shown, when the corrugated composite plate is flat rolled, the upper and lower rolls are flat rolls, and the upper and lower surfaces of the corrugated composite plate are gradually flattened by the rolling of the rolls.

[0118] Step 120: Partition the first-state deformation zone based on the first neutral point to obtain a first region set, and determine the first total rolling force based on the first rolling parameter, the second rolling parameter, and the first region set; the first-state deformation zone is the rolling deformation zone in the state where the lower surface of the upper roll is in full contact with the upper surface of the corrugated composite plate;

[0119] See Figure 4 , this figure shows the rolling deformation zone in the full contact state. In this state, the lower surface of the upper roll in the rolling deformation zone is in full contact with the upper surface of the corrugated composite plate. The intersection point of the center line connecting the upper and lower rolls and the straight line where the center of the exit thickness of the composite flat plate along the rolling direction is located is the coordinate origin Establish a coordinate axis, The positive direction of the axis is the rolling direction, The positive direction of the axis is the direction from the origin to the center of the upper roll. Using the perpendicular line where the first neutral point N F is located as the first dividing line to divide the first state deformation zone into two regions, namely the first complete region I and the second complete region II.

[0120] Step 130: Partition the second state deformation zone based on the second neutral point to obtain a second region set, and determine the second total rolling force based on the first rolling parameter, the second rolling parameter, and the second region set; the second state deformation zone is the rolling deformation zone in the state where the lower surface of the upper roll is not in complete contact with the upper surface of the corrugated composite plate;

[0121] Refer to Figure 5 , this figure shows the rolling deformation zone in the incomplete contact state, in which the lower surface of the upper roll is not in complete contact with the upper surface of the corrugated composite plate in the rolling deformation zone. The coordinate system is established in the same way as Figure 5 , using the perpendicular line where the second neutral point N P is located as the second dividing line, the perpendicular line where the first characteristic point S is located as the third dividing line, and the perpendicular line where the second characteristic point U is located as the fourth dividing line to divide the second state deformation zone into four regions, namely the first incomplete region A, the second incomplete region B, the third incomplete region C, and the fourth incomplete region D.

[0122] Step 140: Determine the target rolling force during the flat roll rolling process based on the first total rolling force and the second total rolling force.

[0123] Considering the special corrugated shape on the surface of the corrugated composite plate, the rolling force will show regular fluctuations in the stable state during the rolling process. Therefore, after obtaining the first total rolling force in the complete contact state and the second total rolling force in the incomplete contact state, the first total rolling force and the second total rolling force are sorted according to a preset rule to obtain the target rolling force; the target rolling force is the alternately arranged first total rolling force and the second total rolling force. The preset rule is the law of time change.

[0124] Figure 1 The rolling parameters obtained by the above method of[[ID=]] are for the flat roll rolling process and can realize the prediction of the rolling force during the flat roll rolling of the corrugated composite plate. In addition, this method takes into account that there are two states in the flat roll rolling deformation zone during the rolling process, calculates the rolling forces in the two states respectively, and determines the target rolling force based on the rolling forces in the two states, and the calculated rolling force is more accurate.

[0125] Based on the method of[[ID=]] Figure 1 , this specification also provides some specific implementation manners of this method, which will be described below.

[0126] Among them, step 110 can be implemented based on the following steps:

[0127] Step 111: Calculate the reduction in the flat rolling process according to formula (1), as shown in formula (1):

[0128] (1)

[0129] Wherein, is the reduction, is the thickness of the clad metal of the corrugated composite plate, is the thickness of the base metal of the corrugated composite plate, is the thickness of the clad metal of the composite flat plate, is the thickness of the base metal of the composite flat plate.

[0130] Step 112: Calculate the contact arc length in the flat rolling process according to formula (2), as shown in formula (2):

[0131] (2)

[0132] Wherein, is the contact arc length, is the roll radius.

[0133] Step 113: Calculate the shear yield stress of the clad metal of the corrugated composite plate according to formula (3), as shown in formula (3):

[0134] (3)

[0135] Wherein, is the shear yield stress of the clad metal of the corrugated composite plate, is the yield stress of the clad metal, is the clad metal model parameter, and its value depends on the specific material.

[0136] Step 114: Calculate the shear yield stress of the base metal of the corrugated composite plate according to formula (4), as shown in formula (4):

[0137] (4)

[0138] Wherein, is the shear yield stress of the base metal of the corrugated composite plate, is the yield stress of the base metal, is the base metal model parameter, and its value depends on the specific material.

[0139] Step 115 Calculate the equivalent yield shear stress in the rolling process according to formula (5), as shown in formula (5):

[0140] (5)

[0141] Among them, is the equivalent yield shear stress.

[0142] Step 120 can be implemented based on the following steps:

[0143] Step 121: Divide the first state deformation zone with the vertical line where the first neutral point is located as the first dividing line to obtain a first region set, and the first region set includes a first complete region and a second complete region;

[0144] Step 122: According to the contact friction factor between the base metal and the lower roll, the contact friction factor between the clad metal and the upper roll, the thickness of the clad metal of the composite plate, the thickness of the base metal of the composite plate, the roll radius in the first rolling parameters, the reduction, the corrugation amplitude, the equivalent yield shear stress in the second rolling parameters, use formula (6):

[0145] (6)

[0146] Calculate the first complete rolling force of the first complete region;

[0147] Among them, , is the first complete rolling force, is the contact friction factor between the base metal and the lower roll, is the equivalent yield shear stress, is the contact friction factor between the clad metal and the upper roll, is the reduction, is the corrugation amplitude, is the roll radius, is the abscissa of any point position in the rolling deformation zone, is the thickness of the clad metal of the composite plate, is the thickness of the base metal of the composite plate.

[0148] Step 123: According to the contact friction factor between the base metal and the lower roll, the contact friction factor between the clad metal and the upper roll, the roll radius, the post-entry back tension, the thickness of the clad metal and the base metal of the composite plate, the corrugation amplitude, the reduction, the equivalent yield shear stress and the contact arc length in the second rolling parameters, use formula (7):

[0149] (7)

[0150] Calculate the second complete rolling force of the second complete region;

[0151] Among them, , is the second complete rolling force; is the contact arc length, is the post - entrance back tension.

[0152] Step 124: Based on the first boundary condition, the first complete rolling force, and the second complete rolling force, determine the abscissa of the first neutral point; the first boundary condition is that the rolling forces in the first complete region and the second complete region are equal at the first dividing line; that is, when, the first complete rolling force and the second complete rolling force are equal, as shown in formula (8):

[0153] (8)

[0154] Solve formula (8) to obtain the abscissa of the first neutral point . is the first complete rolling force, is the second complete rolling force.

[0155] Step 125: Based on the abscissa of the first neutral point, perform integral solution on the first complete rolling force and the second complete rolling force to obtain the total rolling force of the first state deformation zone.

[0156] As an alternative, step 125 can be implemented based on the following steps:

[0157] Adopt formula (9):

[0158] (9)

[0159] Calculate to obtain the total rolling force of the first state deformation zone;

[0160] wherein, is the total rolling force of the first state, is the width of the corrugated composite plate.

[0161] As an alternative, step 130 can be implemented based on the following steps:

[0162] Step 131: Determine the target shape parameters, the abscissa of the first characteristic point, and the abscissa of the second characteristic point of the second state deformation zone according to the first rolling parameter and the second rolling parameter; the first characteristic point is the intersection point of the corrugated composite plate and the upper roll in the second state deformation zone, and the second characteristic point is the trough point of the corrugated composite plate in the second state deformation zone; the target shape parameters include the first shape parameter, the second shape parameter, the third shape parameter, and the fourth shape parameter;

[0163] Step 132: Divide the second state deformation area with the perpendicular line where the second neutral point is located as the second dividing line, the perpendicular line where the first feature point is located as the third dividing line, and the perpendicular line where the second feature point is located as the fourth dividing line, to obtain a second area set, where the second area set includes a first incomplete area, a second incomplete area, a third incomplete area, and a fourth incomplete area;

[0164] Step 133: Based on the target shape parameter, the abscissa of the first feature point, the abscissa of the second feature point, the first rolling parameter, and the second rolling parameter, calculate the first incomplete rolling force of the first incomplete area, the second incomplete rolling force of the second incomplete area, the third incomplete rolling force of the third incomplete area, and the fourth incomplete rolling force of the fourth incomplete area;

[0165] Step 134: Determine the abscissa of the second neutral point according to the fourth boundary condition, the first incomplete rolling force, and the second incomplete rolling force; the fourth boundary condition is that the rolling forces of the first incomplete area and the second incomplete area are equal at the second dividing line; that is, when, the first incomplete rolling force and the second incomplete rolling force are equal, as shown in formula (10):

[0166] (10)

[0167] Solve formula (10) to obtain the abscissa of the second neutral point.

[0168] Among them, is the first incomplete rolling force, is the second incomplete rolling force.

[0169] Step 135: Based on the abscissa of the second neutral point, perform integral solution on the first incomplete rolling force, the second incomplete rolling force, the third incomplete rolling force, and the fourth incomplete rolling force to obtain the second total rolling force of the second state deformation area.

[0170] As an optional method, step 131 can be implemented based on the following steps:

[0171] Step 1311: According to the number of corrugations , corrugation amplitude , and equivalent radius of the corrugated roll in the first rolling parameter, use formula (11):

[0172] (11)

[0173] Calculate to obtain the first shape parameter;

[0174] Step 1312: According to the thickness of the clad metal and the thickness of the base metal of the corrugated composite plate, the corrugation amplitude, the number of corrugations, the equivalent radius of the corrugated roll in the first rolling parameters, and the contact arc length in the second rolling parameters, use formula (12):

[0175] (12)

[0176] Calculate the second shape parameter;

[0177] Step 1313: According to the number of corrugations 、corrugation amplitude 、equivalent radius of the corrugated roll in the first rolling parameters, use formula (13):

[0178] (13)

[0179] Calculate the third shape parameter;

[0180] Step 1314: According to the thickness of the clad metal and the thickness of the base metal of the corrugated composite plate, the corrugation amplitude, the number of corrugations, the equivalent radius of the corrugated roll in the first rolling parameters, and the contact arc length in the second rolling parameters, use formula (14):

[0181] (14)

[0182] Calculate the fourth shape parameter;

[0183] Step 1315: According to the roll radius, corrugation amplitude, thickness of the clad metal and the thickness of the base metal of the composite flat plate in the first rolling parameters, the reduction in the second rolling parameters, the third shape parameter, and the fourth shape parameter, use formula (15):

[0184] (15)

[0185] Calculate the abscissa of the first characteristic point;

[0186] Step 1316: According to the equivalent radius of the corrugated roll, the number of corrugations and the contact arc length in the second rolling parameters in the first rolling parameters, use formula (16):

[0187] (16)

[0188] Calculate the abscissa of the second characteristic point;

[0189] where, is the abscissa of the first characteristic point, is the abscissa of the second characteristic point, is the first shape parameter, is the second shape parameter.

[0190] As an alternative, step 133 can be implemented based on the following steps:

[0191] Step 1331: According to the third shape parameter, the fourth shape parameter, the roll radius, the corrugation amplitude, the thickness of the clad metal and the thickness of the base metal of the composite flat plate, the contact friction coefficient between the clad metal and the upper roll, the contact friction coefficient between the base metal and the lower roll, the reduction, the equivalent yield shear stress, and the contact arc length in the first rolling parameter, use formula (17):

[0192] (17)

[0193] Calculate the fourth incomplete rolling force of the fourth incomplete area;

[0194] Wherein, ;

[0195] ;

[0196] ;

[0197] ;

[0198] ;

[0199] is the third shape parameter, is the fourth shape parameter, is the fourth incomplete rolling force;

[0200] Step 1332: Based on the second boundary condition, the first shape parameter, the second shape parameter, the third shape parameter, the fourth shape parameter, the abscissa of the second characteristic point, the contact friction coefficient between the clad metal and the upper roll, the contact friction coefficient between the base metal and the lower roll, the roll radius, the thickness of the clad metal and the thickness of the base metal of the composite flat plate, the corrugation amplitude, the reduction in the second rolling parameter, and the fourth incomplete rolling force, use formula (18):

[0201] (18)

[0202] Calculate the third incomplete rolling force of the third incomplete area; the second boundary condition is that the rolling forces at the fourth dividing line of the fourth incomplete area and the third incomplete area are equal;

[0203] Wherein, ;

[0204] is the abscissa of the second feature point, is the third incomplete rolling force, is the first shape parameter, is the second shape parameter;

[0205] Step 1333: Based on the third boundary condition, the target shape parameter, the abscissa of the first feature point, the contact friction coefficient between the clad metal and the upper roll in the first rolling parameter, the contact friction coefficient between the base metal and the lower roll, the roll radius, the ripple amplitude, the thickness of the clad metal and the thickness of the base metal of the composite flat plate, the equivalent yield shear stress, the reduction and the third incomplete rolling force in the second rolling parameter, use formula (19):

[0206] (19)

[0207] Calculate the second incomplete rolling force of the second incomplete region; the third boundary condition is that the rolling forces at the third dividing line of the third incomplete region and the second incomplete region are equal;

[0208] Among them, ;

[0209] is the second incomplete rolling force;

[0210] Step 1334: According to the contact friction coefficient between the clad metal and the upper roll in the first rolling parameter, the contact friction coefficient between the base metal and the lower roll, the ripple amplitude, the pre-export tension, the thickness of the clad metal and the thickness of the base metal of the composite flat plate, and the reduction and the equivalent yield shear stress in the second rolling parameter, use formula (20):

[0211] (20)

[0212] Calculate the first incomplete rolling force of the first incomplete region;

[0213] Among them, , is the pre-export tension, is the first incomplete rolling force.

[0214] As an alternative, step 135 can be implemented based on the following steps:

[0215] Use formula (21):

[0216] (21)

[0217] Calculate the second total rolling force of the second state deformation zone;

[0218] Among them, is the second total rolling force.

[0219] Next, take the copper-aluminum corrugated composite plate as an example to illustrate the specific implementation process of the technical solution provided by the present invention:

[0220] Step 1: The cladding layer of the corrugated composite plate is a copper layer, and the base layer is an aluminum layer. Obtain the thickness of the cladding layer metal of the corrugated composite plate according to the rolling process data of a certain pass , the thickness of the base layer metal , the width of the corrugated composite plate ; the roll radii of the upper and lower rolls during flat roll rolling , the contact friction coefficient between the cladding layer metal and the upper roll during rolling , the contact friction coefficient between the base layer metal and the lower roll , the front tension before the exit , the back tension after the entrance ; the thickness of the cladding layer metal of the composite flat plate after rolling , the thickness of the base layer metal ; the number of corrugations of the corrugated roll during corrugated rolling , the corrugation amplitude , the equivalent radius of the corrugated roll ;

[0221] Step 2: According to the roll radius, the thickness of the cladding layer metal of the corrugated composite plate, the thickness of the base layer metal, the thickness of the cladding layer metal of the composite flat plate, and the thickness of the base layer metal, calculate the reduction and the contact arc length during flat roll rolling as follows:

[0222] ;

[0223] ;

[0224] Step 3: According to the thickness of the cladding layer metal of the corrugated composite plate, the thickness of the base layer metal, the thickness of the cladding layer metal of the composite flat plate, and the thickness of the base layer metal, calculate the shear yield stress of the cladding layer metal, the shear yield stress of the base layer metal, and the equivalent yield shear stress during rolling;

[0225] According to the material properties, the yield stress of the copper layer metal is obtained as 335.2 MPa and the model parameter is 0.113 through experiments; the yield stress of the aluminum layer metal is 189.2 MPa and the model parameter is 0.239. The shear yield stress of the cladding layer metal , the shear yield stress of the base layer metal and the equivalent yield shear stress during rolling can be calculated as follows:

[0226] ;

[0227] ;

[0228] ;

[0229] Step 4: Divide the deformation zone into two states according to the shape of the deformation zone in the flat-roll rolling, including the full-contact state and the incomplete-contact state, and calculate the corresponding rolling forces in the two states respectively;

[0230] Step 5: Take the intersection point of the line connecting the centers of the upper and lower rolls and the line where the center of the exit thickness of the composite plate along the rolling direction is located as the coordinate origin Establish a coordinate axis, The positive direction of the x-axis is the rolling direction, The positive direction of the y-axis is the line connecting the origin and the center of the upper roll. Divide the deformation zone in the full-contact state into two regions, including Region I and Region II, and calculate the first full rolling force in Region I and the second full rolling force in Region II respectively;

[0231] Step 5.1: Calculate the first full rolling force in Region I according to the corrugation amplitude, equivalent yield shear stress, reduction, contact friction coefficient between the clad metal and the upper roll, contact friction coefficient between the base metal and the lower roll, and roll radius as follows:

[0232] ;

[0233] where, ;

[0234] Step 5.2: Calculate the second full rolling force in Region II according to the corrugation amplitude, equivalent yield shear stress, reduction, contact friction coefficient between the clad metal and the upper roll, contact friction coefficient between the base metal and the lower roll, the radii and contact arc lengths of the upper and lower rolls in the flat-roll rolling process as follows;

[0235] ;

[0236] where, ;

[0237] Step 6: Determine the coordinates of the neutral point of the lower roll according to the boundary condition that the rolling forces at the junction of Region I and Region II are equal, and combine the contact arc length, the width of the composite plate, and the rolling forces obtained in Regions I - II to calculate the first total rolling force in the full-contact state . Where and The specific method is as follows:

[0238] According to the stress boundary condition, when , , solve to obtain is (0.002192, 0), and then the first total rolling force in the fully - contact state is obtained by integrating the regions I and II. as follows:

[0239] ;

[0240] Step 7: Take the line connecting the centers of the upper and lower rolls and the line where the center of the exit thickness of the composite plate along the rolling direction is located as the coordinate origin. Establish coordinate axes. The positive direction of the x - axis is the rolling direction. The positive direction of the y - axis is the direction from the origin to the center of the upper roll. Divide the deformation zone in the incomplete - contact state into four regions, including region A, region B, region C, and region D, and calculate the first incomplete rolling force in region A , the second incomplete rolling force in region B , the third incomplete rolling force in region C and the fourth incomplete rolling force in region D ;

[0241] Step 7.1: Calculate the target shape parameters in the incomplete - contact state according to the corrugation amplitude, the number of corrugations, the equivalent radius of the corrugated roll, the radii of the upper and lower rolls and the contact arc length in the flat - roll rolling process. , , , and the coordinates of the characteristic points and are as follows:

[0242] ;

[0243] ;

[0244] ;

[0245] ;

[0246] ;

[0247] ;

[0248] Step 7.2: Calculate the rolling force in region D according to the corrugation amplitude, the equivalent yield shear stress, the reduction, the contact friction coefficient between the clad metal and the upper roll, the contact friction coefficient between the base metal and the lower roll, and the shape parameters , , the post - entrance back - tension, and the radii of the upper and lower rolls in the flat - roll rolling process. as follows:

[0249] ;

[0250] ;

[0251] ;

[0252] ;

[0253] ;

[0254] ;

[0255] Step 7.3: According to the ripple amplitude, equivalent yield shear stress, reduction, contact friction coefficient between the clad metal and the upper roll, contact friction coefficient between the base metal and the lower roll, shape parameters , , the radii of the upper and lower rolls during flat rolling, and the boundary condition that the rolling forces in regions C and D are equal at , calculate the rolling force in region C as follows:

[0256] ;

[0257] ;

[0258] Step 7.4: According to the ripple amplitude, equivalent yield shear stress, reduction, contact friction coefficient between the clad metal and the upper roll, contact friction coefficient between the base metal and the lower roll, the radii of the upper and lower rolls during flat rolling, and the boundary condition that the rolling forces in regions B and C are equal at , calculate the rolling force in region B as follows:

[0259] ;

[0260] ;

[0261] Step 7.5: According to the ripple amplitude, equivalent yield shear stress, reduction, contact friction coefficient between the clad metal and the upper roll, contact friction coefficient between the base metal and the lower roll, the radii of the upper and lower rolls during flat rolling, and the pre - exit tension, calculate the rolling force in region A as follows:

[0262] ;

[0263] where .

[0264] Step 8: Determine , and the rolling force obtained by combining the contact arc length, the width of the composite plate, and regions A to D ~ , calculate the second total rolling force in the incomplete contact state . Among them and The specific method is as follows:

[0265] According to the stress boundary conditions, when , , solving to obtain is (0.001542, 0), and then through integration of regions A, B, C, and D, is as follows:

[0266] ;

[0267] Step 9: Considering the special corrugated shape on the surface of the corrugated composite plate, there will be regular fluctuations in the stable state during the rolling process. Obtain the rolling force in the full contact state and the rolling force in the incomplete contact state . After that, arrange the two regularly according to time to obtain the rolling force during the flat roll rolling process.

[0268] Refer to Figure 6 . To verify the reliability of the present invention, finite element simulation is carried out using the same process parameters as the above method, and the rolling force during the simulated stable rolling process is extracted. Through comparison of the results, it can be obtained that: the average value of the simulated rolling force is 159.7 kN, the average value calculated by the model is 163.52 kN, and the error is within 2.4%. It proves that the rolling force calculated by the present invention during the flat roll rolling process of the corrugated composite plate has high accuracy and can be better applied to actual production.

[0269] In the case of dividing each functional module corresponding to each function, Figure 7 shows a structural schematic diagram of a rolling force determination device during the flat roll rolling process of a corrugated composite plate provided by the present invention. As Figure 7 shown, the device includes:

[0270] The second rolling parameter determination module 701 is used to determine the second rolling parameters during the flat roll rolling process; the second rolling parameters include the reduction, the contact arc length, and the shear yield stress parameter; the second rolling parameters are calculated from the first rolling parameters during the flat roll rolling process of the corrugated composite plate;

[0271] The total rolling force calculation module 702 for the first state deformation zone is configured to partition the first state deformation zone based on the first neutral point to obtain a first region set, and determine a first total rolling force based on the first rolling parameters, the second rolling parameters, and the first region set; the first state deformation zone is the rolling deformation zone in a state where the upper roll is in full contact with the upper surface of the corrugated composite plate.

[0272] The total rolling force calculation module 703 for the second state deformation zone partitions the second state deformation zone based on the second neutral point to obtain a second region set, and determines a second total rolling force based on the first rolling parameters, the second rolling parameters, and the second region set; the second state deformation zone is the rolling deformation zone in a state where the upper roll is not in full contact with the upper surface of the corrugated composite plate.

[0273] The target rolling force determination module 704 is configured to determine the target rolling force during the flat roll rolling process based on the first total rolling force and the second total rolling force.

[0274] All relevant content of each step involved in the above method embodiment can be cited in the function description of the corresponding functional module, and will not be elaborated here.

[0275] The above mainly introduces the solution provided by the embodiment of the present invention from the perspective of the interaction between each module. It can be understood that, in order to implement the above functions, it includes the corresponding hardware structure and / or software module 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 form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0276] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present invention are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a terminal, a user device, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that integrates 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).

[0277] Although the present invention has been described in connection with various embodiments, however, in the process of implementing the claimed invention, those skilled in the art can understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit can implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0278] Although the present invention has been described in connection with specific features and their embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present invention. Accordingly, the present specification and the drawings are merely exemplary illustrations of the invention defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present 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 changes and modifications.

Claims

1. A method for determining rolling force during flat roll rolling of a corrugated composite plate, characterized in that: include: determining a second rolling parameter in a flat roll rolling process; The second rolling parameters include reduction, contact arc length and shear yield stress parameters; The second rolling parameter is calculated from the first rolling parameter during the flat roll rolling of the corrugated composite plate; the first rolling parameter includes the thickness of the composite metal of the corrugated composite plate, the thickness of the base metal of the corrugated composite plate, the width of the corrugated composite plate, the roller radius of the upper and lower rollers during the flat roll rolling process, the contact friction factor between the composite metal and the upper roller during the rolling process, the contact friction factor between the base metal and the lower roller, the tension before the outlet, the tension after the inlet, the thickness of the composite metal and the base metal of the composite plate after rolling, the number of corrugations of the corrugation roller, the corrugation amplitude, and the equivalent radius of the corrugation roller; Partitioning the first state deformation zone based on the first neutral point to obtain a first region set, and determining a first total rolling force based on the first rolling parameter and the second rolling parameter and the first region set; The first state deformation zone is a rolling deformation zone in a state where the upper roller is in full contact with the upper surface of the corrugated composite plate; Partitioning the second state deformation zone based on the second neutral point to obtain a second region set, and determining a second total rolling force based on the first rolling parameter and the second rolling parameter and the second region set; The second state deformation zone is a rolling deformation zone in a state where the upper roller is in incomplete contact with the upper surface of the corrugated composite plate; A target rolling force during flat roll rolling is determined based on the first total rolling force and the second total rolling force.

2. The method for determining rolling force during flat roll rolling of corrugated composite plate according to claim 1, characterized in that: The partitioning of the first state deformation zone based on the first neutral point to obtain a first region set, and determining a first total rolling force based on the first rolling parameter, the second rolling parameter and the first region set comprises: The first state deformation zone is divided by taking the vertical line where the first neutral point is located as a first dividing line to obtain a first region set, wherein the first region set includes a first complete region and a second complete region; According to the first rolling parameter and the second rolling parameter, the formula is adopted: ； Calculating and obtaining a first complete rolling force of the first complete area; in, , is the first full rolling force, is the contact friction coefficient between the base metal and the lower roll, is the equivalent yield shear stress, is the contact friction coefficient between the composite metal and the upper roll, is the amount of pressure, is the ripple amplitude, is the roller radius, is the horizontal coordinate of any point in the rolling deformation zone, is the thickness of the composite metal layer of the composite plate, is the base metal thickness of the composite plate; According to the first rolling parameter and the second rolling parameter, the formula is adopted: ； calculating and obtaining a second complete rolling force in the second complete area; in, , is the second full rolling force; is the contact arc length, is the post-entry tension; Determining a first neutral point abscissa based on a first boundary condition, the first complete rolling force, and the second complete rolling force; the first boundary condition is that the rolling forces of the first complete region and the second complete region at the first dividing line are equal; Based on the first neutral point abscissa, the first complete rolling force and the second complete rolling force are integrated and solved to obtain a first total rolling force of the deformation zone in the first state.

3. The method for determining rolling force during flat roll rolling of corrugated composite plate according to claim 2, characterized in that: The first total rolling force of the first state deformation zone is obtained by integrating and solving the first complete rolling force and the second complete rolling force based on the first neutral point horizontal coordinate, and comprising: Using the formula: ； Calculating and obtaining a first total rolling force in the deformation zone of the first state; in, is the first total rolling force, is the width of the corrugated composite board, is the horizontal coordinate of the first neutral point.

4. The method for determining rolling force during flat roll rolling of corrugated composite plate according to claim 3, characterized in that: Partitioning the second state deformation zone based on the second neutral point to obtain a second region set, and determining a second total rolling force based on the first rolling parameter and the second rolling parameter and the second region set comprises: Determine the target shape parameter, the abscissa of the first characteristic point and the abscissa of the second characteristic point in the deformation zone of the second state according to the first rolling parameter and the second rolling parameter; the first characteristic point is the intersection point of the corrugated composite plate and the upper roller in the deformation zone of the second state, and the second characteristic point is the trough point of the corrugated composite plate in the deformation zone of the second state; The second state deformation zone is divided by taking the vertical line where the second neutral point is located as the second dividing line, the vertical line where the first characteristic point is located as the third dividing line, and the vertical line where the second characteristic point is located as the fourth dividing line to obtain a second region set, wherein the second region set includes a first incomplete region, a second incomplete region, a third incomplete region, and a fourth incomplete region; Based on the target shape parameter, the abscissa of the first characteristic point, the abscissa of the second characteristic point, the first rolling parameter, and the second rolling parameter, a first incomplete rolling force of the first incomplete region, a second incomplete rolling force of the second incomplete region, a third incomplete rolling force of the third incomplete region, and a fourth incomplete rolling force of the fourth incomplete region are calculated; Determining the second neutral point abscissa according to a fourth boundary condition, the first incomplete rolling force and the second incomplete rolling force; the fourth boundary condition is that the rolling forces of the first incomplete region and the second incomplete region at the second dividing line are equal; Based on the second neutral point horizontal coordinate, the first incomplete rolling force, the second incomplete rolling force, the third incomplete rolling force and the fourth incomplete rolling force are integrated and solved to obtain the second total rolling force of the deformation zone in the second state.

5. The method for determining rolling force during flat roll rolling of corrugated composite plate according to claim 4, characterized in that: The target shape parameters include a first shape parameter, a second shape parameter, a third shape parameter, and a fourth shape parameter; the first incomplete rolling force of the first incomplete area, the second incomplete rolling force of the second incomplete area, the third incomplete rolling force of the third incomplete area, and the fourth incomplete rolling force of the fourth incomplete area are calculated based on the target shape parameters, the first feature point abscissa, the second feature point abscissa, the first rolling parameter, and the second rolling parameter, and include: According to the target shape parameter, the first rolling parameter and the second rolling parameter, the formula is adopted: ； Calculating and obtaining a fourth incomplete rolling force of the fourth incomplete region; in, ; ； ； ； ； is the third shape parameter, is the fourth shape parameter, is the fourth incomplete rolling force; Based on the second boundary condition, the target shape parameter, the second characteristic point abscissa, the first rolling parameter, the second rolling parameter and the fourth incomplete rolling force are calculated using the formula: ； The third incomplete rolling force of the third incomplete region is calculated; the second boundary condition is that the rolling forces of the fourth incomplete region and the third incomplete region are equal at the fourth cutting line; in, ; is the horizontal coordinate of the second feature point, is the third incomplete rolling force, is the first shape parameter, is the second shape parameter; Based on the third boundary condition, the target shape parameter, the first characteristic point abscissa, the first rolling parameter, the second rolling parameter and the third incomplete rolling force, the formula is adopted: ； The second incomplete rolling force of the second incomplete region is calculated; the third boundary condition is that the rolling forces of the third incomplete region and the second incomplete region are equal at the third dividing line; in, ; is the second incomplete rolling force; is the horizontal coordinate of the first feature point; According to the first rolling parameter and the second rolling parameter, the formula is adopted: ； Calculating and obtaining a first incomplete rolling force of the first incomplete area; in, , is the tension before the outlet, is the first incomplete rolling force.

6. The method for determining rolling force during flat roll rolling of corrugated composite plate according to claim 5, characterized in that: Based on the second neutral point horizontal coordinate, the first incomplete rolling force, the second incomplete rolling force, the third incomplete rolling force and the fourth incomplete rolling force are integrated and solved to obtain the second total rolling force of the deformation zone in the second state, including: Using the formula: ； calculating and obtaining a second total rolling force in the deformation zone of the second state; in, is the second total rolling force, is the horizontal coordinate of the second neutral point.

7. The method for determining rolling force during flat roll rolling of corrugated composite plate according to claim 5, characterized in that: The step of determining the target shape parameter, the first characteristic point horizontal coordinate and the second characteristic point horizontal coordinate of the deformation zone in the second state according to the first rolling parameter and the second rolling parameter comprises: According to the first rolling parameter, the formula is adopted: ； Calculate and obtain the first shape parameter; in, is the number of ripples, >0, is the equivalent radius of the corrugation roller; According to the first rolling parameter and the second rolling parameter, the formula is adopted: ； The second shape parameter is calculated; in, is the thickness of the composite metal layer of the corrugated composite plate, is the base metal thickness of the corrugated composite plate; According to the first rolling parameter, the formula is adopted: ； The third shape parameter is calculated; According to the first rolling parameter and the second rolling parameter, the formula is adopted: ； The fourth shape parameter is calculated; According to the first rolling parameter, the second rolling parameter, the third shape parameter and the fourth shape parameter, the formula is adopted: ； Calculate and obtain the horizontal coordinate of the first feature point; According to the first rolling parameter and the second rolling parameter, the formula is adopted: ； Calculate and obtain the horizontal coordinate of the second feature point; in, is the horizontal coordinate of the first feature point, is the horizontal coordinate of the second feature point.

8. The method for determining rolling force during flat roll rolling of corrugated composite plate according to claim 1, characterized in that: The determining of the target rolling force in the flat roll rolling process based on the first total rolling force and the second total rolling force comprises: The first total rolling force and the second total rolling force are sorted according to a preset rule to obtain a target rolling force; the target rolling force is the first total rolling force and the second total rolling force arranged alternately.

9. The method for determining rolling force during flat roll rolling of corrugated composite plates according to claim 3, characterized in that: Determining the abscissa of the first neutral point based on the first boundary condition, the first complete rolling force, and the second complete rolling force comprises: For the formula: ； Solve and obtain the horizontal coordinate of the first neutral point.

10. A device for determining rolling force during flat roll rolling of a corrugated composite plate, applied to the method for determining rolling force during flat roll rolling of a corrugated composite plate as claimed in any one of claims 1 to 9, characterized in that: include: A second rolling parameter determination module, used to determine a second rolling parameter in a flat roll rolling process; The second rolling parameters include reduction, contact arc length and shear yield stress parameters; The second rolling parameter is calculated from the first rolling parameter during the flat roll rolling process of the corrugated composite plate; A first state deformation zone total rolling force calculation module, used for partitioning the first state deformation zone based on the first neutral point to obtain a first zone set, and determining a first total rolling force based on the first rolling parameter and the second rolling parameter and the first zone set; The first state deformation zone is a rolling deformation zone in a state where the upper roller is in full contact with the upper surface of the corrugated composite plate; A second state deformation zone total rolling force calculation module, which partitions the second state deformation zone based on the second neutral point to obtain a second zone set, and determines a second total rolling force based on the first rolling parameter and the second rolling parameter and the second zone set; The second state deformation zone is a rolling deformation zone in a state where the upper roller is in incomplete contact with the upper surface of the corrugated composite plate; The target rolling force determination module is used to determine the target rolling force in the flat roll rolling process based on the first total rolling force and the second total rolling force.

Images