A method of roll contouring for backing bearing segments of a sendzimir mill

Abstract

The application discloses a roll shape configuration method of backing bearing segments of a Sendzimir mill, and comprises the following steps: according to the positions of the backing bearings, the backing bearings which constitute support rollers are divided into multiple groups; the roll body crowns of the backing bearings are determined; the harmful contact zone lengths of the two ends of the backing bearings and the two intermediate transmission rollers and the two intermediate driven rollers are determined; based on the roll body crowns of the backing bearings and the harmful contact zone lengths of the two ends of the backing bearings and the two intermediate transmission rollers and the two intermediate driven rollers, the coefficients of the roll shape curves of the corresponding backing bearings are determined; and then the roll shape curves of the backing bearings are determined; wherein the roll shape curves corresponding to the backing bearings in the same group are the same and are all six-order polynomial roll shape curves. The application can effectively smooth the contact stress peak, homogenize the inter-roller contact stress, improve the uneven wear degree of the rollers and improve the same plate difference control level of the mill. Moreover, the application does not need to make any modification on the equipment and is convenient to popularize and apply on the same type of Sendzimir mill in various steel plants.

Description

Technical Field

[0001] This invention relates to the field of strip rolling technology, and in particular to a method for configuring the roll shape of the backing bearing section of a Sendzimir mill. Background Technology

[0002] Against the backdrop of a "dual carbon" environment, the global energy structure is facing a critical period of transformation, and the automotive industry is shifting towards new energy sources and accelerating electrification. As one of the three core components of new energy vehicles, the drive motor has extremely stringent requirements for power density, energy consumption, and size and weight. Therefore, higher demands are placed on motor manufacturing materials, especially cold-rolled non-oriented silicon steel sheets with lower high-frequency iron losses, higher magnetic induction, and higher yield strength. Practice has proven that using high-grade non-oriented silicon steel to manufacture motor stators and rotors not only improves drive motor efficiency but also further reduces carbon emissions, contributing to energy conservation and carbon reduction throughout the entire lifecycle of steel materials.

[0003] Sendzimir mills are the main equipment for the production of cold-rolled non-oriented silicon steel, and the same-plate difference control technology is one of the core technologies in the rolling process of this type of mill. The same-plate difference directly affects the stacking factor of silicon steel products. Higher precision requirements for the same-plate difference mean lower motor losses, which can improve the driving range of new energy vehicles.

[0004] To produce high-precision non-oriented silicon steel with consistent sheet thickness, major steel mills in the Sendzimir rolling mill have adopted measures such as optimizing the taper shape of the intermediate roll, rationally determining the reduction amount of each ASU (Automatic Subsidiary Unit), and improving the rolling process of each pass, achieving significant results. However, as the demand for thinner cold-rolled non-oriented silicon steel sheets from users of new energy vehicle drive motors continues to decrease, silicon steel products are gradually shifting from 0.35mm thickness to 0.25-0.30mm, and even 0.2-0.25mm thickness. This has drastically increased the difficulty of controlling the consistent sheet thickness of silicon steel products. Therefore, developing more advanced consistent sheet thickness control technologies has become one of the key research and development directions that urgently need to be addressed.

[0005] One document discloses "A method for controlling edge drop in silicon steel production using a Sendzimir mill." This document provides a single-taper intermediate roll profile and an intermediate roll slip control strategy. However, it does not address the roll profile design for other types of rolls in the mill, and the ability to control sheet shape discrepancies needs further improvement. Another document discloses "The driven roll profile of the second intermediate roll in a Sendzimir mill." This document provides roll profiles for the two intermediate driven rolls, including parabolic, elliptical, or quartic curves, which can further reduce the contact stress peaks between the two intermediate driven rolls and the first intermediate roll. However, this document does not consider the contact pressure of the support roll on the two intermediate driven rolls, which is greater than the influence of the first intermediate roll. Furthermore, there are more pronounced stress peaks between the support roll and the two intermediate driven rolls, significantly impacting uneven roll wear and sheet shape control capabilities. Yet another document discloses "A method for eliminating bearing marks on the backing of a 20-roll mill." The literature presents a roller shape for backed bearings, but the roller shape of this method is designed with tapered transition sections on both sides of the bearing. This can only avoid stress concentration at the contact edge, but cannot effectively reduce stress peaks. Instead, it increases the overall stress value. Summary of the Invention

[0006] This invention provides a method for configuring the roll shape of the backing bearing section of a Sendzimir mill to solve the technical problems of poor control of plate difference and inability to effectively reduce stress peaks in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] On one hand, the present invention provides a method for configuring the roll shape of a backing bearing section of a Sendzimir mill, the method comprising:

[0009] Based on the position of each backing bearing, the backing bearings that make up the support roller are divided into multiple groups; each group includes two backing bearings, and the backing bearings in the same group are symmetrical about the midpoint of the support roller spindle.

[0010] Determine the roll body crown of each backing bearing;

[0011] Determine the length of the harmful contact zone between each backing bearing and the two intermediate drive rollers and the two intermediate follower rollers;

[0012] Based on the roll body crown of the backing bearing and the length of the harmful contact area between the two ends of the backing bearing and the two intermediate drive rollers and the two intermediate follower rollers, the coefficient of the corresponding backing bearing roll profile curve is determined.

[0013] The roller profile of each backing bearing is determined based on the coefficient of the roller profile curve of each backing bearing; wherein the roller profile curves corresponding to backing bearings in the same group are the same.

[0014] Furthermore, the roll body crown of the backing bearings located in the same group is the same;

[0015] The formula for calculating the crown of the roller body is:

[0016] D j =k j *D

[0017] Among them, D j The k represents the roll body crown of the j-th backing bearing of the support roller; j The convexity of the j-th backing bearing of the support roller is the proportion of the total convexity of the support roller; D represents the total convexity of the support roller.

[0018] Furthermore, the harmful contact area lengths at both ends of the backing bearings located in the same group are the same as those of the two intermediate drive rollers and the two intermediate follower rollers; the formula for calculating the length of the harmful contact area is:

[0019] C j =p j *30

[0020] Among them, C j p represents the length of the harmful contact area between the two ends of the j-th backing bearing of the support roller and the two intermediate drive rollers and two intermediate follower rollers, in mm; j This represents the proportion of rolling force borne by the j-th backing bearing.

[0021] Furthermore, the roll profile curves of each backing bearing are all sixth-order polynomial roll profile curves.

[0022] Furthermore, based on the roll body crown of the backing bearing and the length of the harmful contact area between the two ends of the backing bearing and the two intermediate drive rollers and the two intermediate follower rollers, the coefficients of the corresponding backing bearing roll profile curve are determined, including:

[0023] Based on the roll body crown of the backing bearing and the length of the harmful contact area between the two ends of the backing bearing and the two intermediate drive rollers and the two intermediate follower rollers, the positions of the characteristic points of the roll profile curve of the corresponding backing bearing are determined; among them, the position of the first type of characteristic point is related to the length of the harmful contact area of ​​the corresponding backing bearing, and the position of the second type of characteristic point is related to the roll body crown of the corresponding backing bearing.

[0024] Substitute the position coordinates of the feature points into the following formula to determine the coefficients of the roll profile curve of the backing bearing:

[0025]

[0026] Where B(x) is the radius difference of the backing bearing; x is the roller body coordinate of the backing bearing, with the origin at the middle of the backing bearing; aij is the i-th coefficient of the roll profile curve of the j-th backing bearing of the support roller.

[0027] Furthermore, the range of x is -L j / 2~L j / 2,L j Indicates the length of the roller body of the backing bearing; a 0j The value range of a is 1.356635E-02 to 3.672743E-01. 1j The value range is 4.660095E-11 to 1.840990E-10, a 2j The value range of a is -1.239290E-03 to 2.475186E-05. 3j The value range of a is 1.445892E-15 to 1.611450E-14. 4j The value range is -1.608775E-07 to 3.041416E-07, a 5j The value range of a is -1.664843E-18 to -2.912735E-19. 6j The value range is 4.472965E-11 to 1.111047E-10.

[0028] Furthermore, the backing bearings that make up the support rollers are divided into three groups: A, B, and C.

[0029] Furthermore, the equation for the roll profile curve corresponding to the backing bearing of group A is:

[0030] B 16 (x) = 4.472965E-11x 6 -2.912735E-19x 5 +3.041416E-07x 4 +1.611450E-14x 3

[0031] -1.239290E-03x 2 +1.755120E-10x+3.672743E-01;

[0032] The equation for the roller profile curve corresponding to the backing bearing of group B is:

[0033] B 25 (x) = 8.302127E-11x 6 -1.192728E-18x 5 +6.876345E-08x 4 +4.479923E-15x 3

[0034] -5.872892E-04x 2+1.840990E-10x+2.104040E-01;

[0035] The equation for the roll profile curve corresponding to the backing bearing of group C is:

[0036] B 34 (x) = 1.111047E-10x 6 -1.664843E-18x 5 -1.608775E-07x 4 +1.445892E-15x 3

[0037] +2.475186E-05x 2 +4.660095E-11x+1.356635E-02;

[0038] Where x represents the coordinate of the roller body of the backing bearing, with the origin at the center of the backing bearing; B 16 (x) represents the difference in the backing bearing radius of group A; B 25 (x) represents the difference in the backing bearing radius of group B; B 34 (x) represents the difference in the backing bearing radius of group C; E is used to represent scientific notation.

[0039] In another aspect, the present invention also provides an electronic device comprising a processor and a memory; wherein the memory stores at least one instruction, which is loaded and executed by the processor to implement the above-described method.

[0040] In another aspect, the present invention also provides a computer-readable storage medium storing at least one instruction that is loaded and executed by a processor to implement the above-described method.

[0041] The beneficial effects of the technical solution provided by this invention include at least the following:

[0042] 1. This invention optimizes the roll shape of each backing bearing section of the support roll of the Sendzimir mill from no roll shape (or flat roll shape) to a sixth-order polynomial roll shape curve. This can eliminate stress peaks at the edge of each backing bearing, homogenize the contact stress between the backing bearing and the two intermediate drive rolls and the two intermediate follower rolls, improve the uneven wear of the rolls, thereby improving the crown control level of the Sendzimir mill and thus achieving a higher precision control capability for the same plate difference.

[0043] 2. This invention combines the structural characteristics of Sendzimir mills, classifies backing bearings according to the assembly position of each backing bearing in the support roll, and gives a sixth-order polynomial roll profile curve for each backing bearing, which improves the uneven stress of each backing bearing, increases the service life of a single backing bearing, and reduces the production cost of silicon steel.

[0044] 3. The present invention uses a single-segment roller curve, which can grind a given roller curve by a CNC grinding machine. Compared with multi-segment roller curves, it can reduce the number of processing steps.

[0045] 4. The roll configuration method of the Sendzimir mill backing bearing section of the present invention does not require any modification to the equipment, and can be easily promoted and applied to multi-roll mills such as 18-roll Sendzimir mills and 20-roll Sendzimir mills in major steel plants. It can effectively improve the economic efficiency of the mill, and is convenient to implement and has a very low cost. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the roll system structure of a 20-roll Sendzimir mill;

[0048] Figure 2 This is a structural diagram of the support roller;

[0049] Figure 3 This is a flowchart of the roll configuration method for the backing bearing section of the Sendzimir mill provided in an embodiment of the present invention;

[0050] Figure 4 This is a comparison diagram of the roller configuration schemes for each backing bearing section;

[0051] Figure 5 This is a comparison diagram of the contact stress distribution between the support rollers under two different roller configurations in each backing bearing section. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0053] First Embodiment

[0054] This embodiment provides a method for configuring the roll shape of the backing bearing section of a Sendzimir rolling mill, and applies it to a 20-roll Sendzimir rolling mill in a cold rolling plant. The 20-roll Sendzimir rolling mill is as follows: Figure 1 As shown, a set of rollers includes 8 support rollers, 4 intermediate drive rollers (two intermediate follower rollers), 4 intermediate rollers (one intermediate roller), and 2 work rollers. Each support roller consists of a spindle, a backing bearing, and a saddle. The positions and numbering of the backing bearings of each support roller are as follows: Figure 2 As shown, the roller body length L of each backing bearingj All are 171mm. In the Sendzimir mill roll configuration, the upper and lower roll systems are arranged symmetrically vertically, and the left and right roll systems are arranged symmetrically horizontally. The several backing bearings that make up the support rolls are also arranged symmetrically. Correspondingly, the roll profile curve of the backing bearings designed in this method is also a symmetrical curve.

[0055] This method, by employing this type of roll configuration on the end faces of each backing bearing section of the support roll, can essentially eliminate stress peaks at the edges of each backing bearing, homogenize the inter-roll contact stress between the support roll and the two intermediate drive rolls and the two intermediate follower rolls, and improve the uneven wear of the support roll's backing bearings, the two intermediate drive rolls, and the two intermediate follower rolls. This enhances the Sendzimir mill's ability to improve strip shape and improves the control level of strip difference within the same strip. Its execution process is as follows: Figure 3 As shown, it includes:

[0056] S1, according to the position of each backing bearing, the backing bearings that make up the support roller are divided into multiple groups; wherein, each group includes two backing bearings, and the backing bearings in the same group are symmetrical about the midpoint of the support roller spindle.

[0057] It should be noted that, since the backing bearings that make up the support roller are arranged symmetrically, in this embodiment, the six backing bearings are divided into three groups according to the position and force distribution curve of each backing bearing: backing bearing 1 and backing bearing 6 are group A, backing bearing 2 and backing bearing 5 are group B, and backing bearing 3 and backing bearing 4 are group C.

[0058] S2, determine the roll body crown of each backing bearing;

[0059] In the Sendzimir mill, the overall crown D of the support roll is 35μm under the action of each ASU pressure. Therefore, the formula for calculating the crown of each backing bearing is:

[0060] D j = k j * D (1)

[0061] Among them, D j The k represents the roll body crown of the j-th backing bearing of the support roller; j The crown of the j-th backing bearing of the support roller is the proportion of the overall crown of the support roller; D represents the overall crown of the support roller.

[0062] Specifically, in this embodiment, k1 = k6 = 0.625, k2 = k5 = 0.8, k3 = k4 = 0.875; thus, the roll body crown borne by the 1st and 6th backing bearings is 25μm, that is: D1 = D6 = 25μm; the roll body crown borne by the 2nd and 5th backing bearings is 32μm, that is: D2 = D5 = 32μm; and the roll body crown borne by the 3rd and 4th backing bearings is 35μm, that is: D3 = D4 = 35μm.

[0063] S3, determine the length of the harmful contact area between each backing bearing and the two intermediate drive rollers and the two intermediate follower rollers;

[0064] The formula for calculating the length of the harmful contact zone between the support rolls of the Sendzimir mill and the two intermediate drive rolls and two intermediate follower rolls under the action of each ASU is as follows:

[0065] C j = p j *30 (2)

[0066] Among them, C j p represents the length of the harmful contact area between the two ends of the j-th backing bearing of the support roller and the two intermediate drive rollers and two intermediate follower rollers, in mm; j This represents the proportion of rolling force borne by the j-th backing bearing.

[0067] Specifically, in this embodiment, the harmful contact area lengths of the 1st and 6th backing bearings are calculated using the above formula as follows: the harmful contact area lengths of the 1st and 6th backing bearings are 25mm, i.e., C1 = C6 = 25mm; the harmful contact area lengths of the 2nd and 5th backing bearings are 28mm, i.e., C2 = C5 = 28mm; and the harmful contact area lengths of the 3rd and 4th backing bearings are 30mm, i.e., C3 = C4 = 30mm.

[0068] S4. Based on the roll body crown of the backing bearing and the length of the harmful contact area between the two ends of the backing bearing and the two intermediate drive rollers and the two intermediate follower rollers, determine the coefficient of the corresponding backing bearing roll profile curve.

[0069] In particular, each backing bearing section of the support roller adopts a sixth-order polynomial roller profile curve, and the curve function is:

[0070]

[0071] Where B(x) is the radius difference of the backing bearings, in μm; x is the roller body coordinate of the backing bearing, with the origin at the center of the backing bearing, in mm; aij is the i-th coefficient of the roll profile curve of the j-th backing bearing of the support roller. The value range of x is -L. j / 2~L j / 2,Lj The length of the roller body for the backing bearing is in mm; a 0j The value range is 1.356635E-02 to 3.672743E-01, a 1j The value range is 4.660095E-11 to 1.840990E-10, a 2j The value range of a is -1.239290E-03 to 2.475186E-05. 3j The value range of a is 1.445892E-15 to 1.611450E-14. 4j The value range is -1.608775E-07 to 3.041416E-07, a 5j The value range of a is -1.664843E-18 to -2.912735E-19. 6j The value range is 4.472965E-11 to 1.111047E-10.

[0072] The positions of the characteristic points of the roll profile curves of each backing bearing section can be determined according to formulas (1) and (2). These characteristic point positions are related to the length of the harmful contact area and the roll body convexity borne by the backing bearing, respectively. Substituting the characteristic point positions into the equation shown in formula (3), the roll profile coefficient 'a' of each backing bearing section can be determined. ij Finally, the roller shape scheme for this type of backing bearing is obtained. For example, for the backing bearing of group A, the roller body crown is 25μm, and the coordinates of its corresponding first-type feature point should be: (-L j / 2,25) and (L j / 2, 25). Its harmful contact length refers to the length of the side section of the roller, and the coordinates of the corresponding second type of feature point should be: (-L j / 2+25,0) and (L j / 2-25,0), and the zero point (0,0) that must be passed through, from which the coefficients of the roller shape equation of the backing bearing of group A can be obtained.

[0073] S5. Based on the coefficients of the roll profile curves of each backing bearing, determine the roll profile curve of each backing bearing; wherein, the roll profile curves corresponding to backing bearings in the same group are the same.

[0074] The roll shape configuration of each backing bearing section of the support roll is as follows: Figure 4 As shown.

[0075] For backing bearing 1 and backing bearing 6, the roller profile is as follows:

[0076] B 16 (x) = 4.472965E-11x 6-2.912735E-19x 5 +3.041416E-07x 4 +1.611450E-14x 3

[0077] -1.239290E-03x 2 +1.755120E-10x+3.672743E-01;

[0078] For backing bearings 2 and 5, the roller profile is as follows:

[0079] B 25 (x) = 8.302127E-11x 6 -1.192728E-18x 5 +6.876345E-08x 4 +4.479923E-15x 3

[0080] -5.872892E-04x 2 +1.840990E-10x+2.104040E-01;

[0081] For backing bearings 3 and 4, the roller profile is as follows:

[0082] B 34 (x) = 1.111047E-10x 6 -1.664843E-18x 5 -1.608775E-07x 4 +1.445892E-15x 3

[0083] +2.475186E-05x 2 +4.660095E-11x+1.356635E-02;

[0084] Where x represents the coordinate of the roller body of the backing bearing, with the origin at the center of the backing bearing; B 16 (x) represents the difference in the backing bearing radius of group A; B 25 (x) represents the difference in the backing bearing radius of group B; B 34 (x) represents the difference in the backing bearing radius of group C; E is used to represent scientific notation.

[0085] In summary, this embodiment provides a method for configuring the roll shape of the backing bearing section of a Sendzimir mill. By obtaining the actual equipment parameters of the Sendzimir mill and based on the support roll structure diagram, the roll body length L of each backing bearing constituting the support roll is determined. j; Obtain the overall crown of the support roller D under the action of each ASU; Obtain the length of the harmful contact area C between the two ends of the backing bearing and the two intermediate drive rollers and the two intermediate follower rollers under the action of each ASU. j The roll profile curve of each backing bearing section of the support roller is determined to be a sixth-order polynomial; the roll profile coefficient 'a' of each backing bearing section of the support roller is determined. ij The final roll shape design for the backing bearing was obtained. After applying it to a 20-roll Sendzimir mill in a cold rolling mill, the following results were obtained: Figure 5 The data shown is from Figure 5 The data shows that the stress peaks at support roller backing bearings 1 and 6 are basically eliminated, the stress peaks at backing bearings 2 and 5 are reduced by 4.82%, and the stress peaks at backing bearings 3 and 4 are reduced by 5.83%. Therefore, this method can effectively smooth the contact stress peaks at the edge of the backing bearings, homogenize the inter-roller contact stress between the support roller and the two intermediate drive rollers and the two intermediate follower rollers, thereby improving the uneven wear of the rolls, enhancing the control level of the same plate difference in non-oriented silicon steel, extending the service life of individual backing bearings, and strengthening the steel enterprise's ability to increase efficiency and revenue and its market competitiveness.

[0086] Second Embodiment

[0087] This embodiment provides an electronic device, which includes a processor and a memory; wherein the memory stores at least one instruction, which is loaded and executed by the processor to implement the method of the first embodiment.

[0088] The electronic device can vary considerably depending on its configuration or performance, and may include one or more processors (central processing units, CPUs) and one or more memories, wherein the memories store at least one instruction that is loaded by the processor and executed in accordance with the above method.

[0089] Third Embodiment

[0090] This embodiment provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the method of the first embodiment described above. The computer-readable storage medium may be a ROM, random access memory, CD-ROM, magnetic tape, floppy disk, or optical data storage device, etc. The instruction stored therein can be loaded and executed by a processor in a terminal.

[0091] Furthermore, it should be noted that the present invention can be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code.

[0092] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0093] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0094] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0095] Finally, it should be noted that the above description represents a preferred embodiment of the present invention. It should be pointed out that although preferred embodiments have been described, those skilled in the art, once they understand the basic inventive concept of the present invention, can make various improvements and modifications without departing from the principles described herein. These improvements and modifications should also be considered within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

Claims

1. A method for configuring the roll shape of the backing bearing section of a Sendzimir rolling mill, characterized in that, include: Based on the position of each backing bearing, the backing bearings that make up the support roller are divided into multiple groups; each group includes two backing bearings, and the backing bearings in the same group are symmetrical about the midpoint of the support roller spindle. Determine the roll body crown of each backing bearing; Determine the length of the harmful contact zone between each backing bearing and the two intermediate drive rollers and the two intermediate follower rollers; Based on the roll body crown of the backing bearing and the length of the harmful contact area between the two ends of the backing bearing and the two intermediate drive rollers and the two intermediate follower rollers, the coefficient of the corresponding backing bearing roll profile curve is determined. Based on the coefficients of the roll profile curves of each backing bearing, the roll profile curves of each backing bearing are determined; among them, the roll profile curves corresponding to backing bearings in the same group are the same. The roller crowns of backing bearings located in the same group have the same crown; the formula for calculating the roller crown is: D j =k j *D Among them, D j The k represents the roll body crown of the j-th backing bearing of the support roller; j The crown of the j-th backing bearing of the support roller is the proportion of the overall crown of the support roller; D represents the overall crown of the support roller. The harmful contact area lengths at both ends of the backing bearings located in the same group are the same as those of the two intermediate drive rollers and the two intermediate follower rollers; the formula for calculating the length of the harmful contact area is: C j =p j *30 Among them, C j p represents the length of the harmful contact area between the two ends of the j-th backing bearing of the support roller and the two intermediate drive rollers and two intermediate follower rollers, in mm; j This indicates the proportion of rolling force borne by the j-th backing bearing; The roll profile curves of each backing bearing are all sixth-order polynomial roll profile curves; The coefficients for determining the roller profile curve of the corresponding backing bearing, based on the roller body crown of the backing bearing and the length of the harmful contact area between the two ends of the backing bearing and the two intermediate drive rollers and the two intermediate follower rollers, include: Based on the roll body crown of the backing bearing and the length of the harmful contact area between the two ends of the backing bearing and the two intermediate drive rollers and the two intermediate follower rollers, the positions of the characteristic points of the roll profile curve of the corresponding backing bearing are determined; among them, the position of the first type of characteristic point is related to the length of the harmful contact area of ​​the corresponding backing bearing, and the position of the second type of characteristic point is related to the roll body crown of the corresponding backing bearing. Substitute the position coordinates of the feature points into the following formula to determine the coefficients of the roll profile curve of the backing bearing: Where B(x) is the radius difference of the backing bearing; x is the roller body coordinate of the backing bearing, with the origin at the middle of the backing bearing; aij is the i-th coefficient of the roll profile curve of the j-th backing bearing of the support roller.

2. The roll configuration method for the backing bearing section of a Sendzimir mill as described in claim 1, characterized in that, The range of x is -L j / 2~L j / 2,L j Indicates the length of the roller body of the backing bearing; a 0j The value range of a is 1.356635E-02 to 3.672743E-01. 1j The value range is 4.660095E-11 to 1.840990E-10, a 2j The value range of a is -1.239290E-03 to 2.475186E-05. 3j The value range of a is 1.445892E-15 to 1.611450E-14. 4j The value range is -1.608775E-07 to 3.041416E-07, a 5j The value range of a is -1.664843E-18 to -2.912735E-19. 6j The value range is 4.472965E-11 to 1.111047E-10.

3. The method for configuring the roll shape of the backing bearing section of a Sendzimir mill as described in claim 1, characterized in that, The backing bearings that make up the support rollers are divided into three groups: A, B, and C.

4. The roll configuration method for the backing bearing section of a Sendzimir mill as described in claim 3, characterized in that, The equation for the roll profile curve corresponding to the backing bearing of Group A is: B 16 (x)=4.472965E-11x 6 -2.912735E-19x 5 +3.041416E-07x 4 +1.611450E-14x 3 -1.239290E-03x 2 +1.755120E-10x+3.672743E-01; The equation for the roller profile curve corresponding to the backing bearing of group B is: B 25 (x)=8.302127E-11x 6 -1.192728E-18x 5 +6.876345E-08x 4 +4.479923E-15x 3 -5.872892E-04x 2 +1.840990E-10x+2.104040E-01; The equation for the roll profile curve corresponding to the backing bearing of group C is: B 34 (x)=1.111047E-10x 6 -1.664843E-18x 5 -1.608775E-07x 4 +1.445892E-15x 3 +2.475186E-05x 2 +4.660095E-11x+1.356635E-02; Where x represents the coordinate of the roller body of the backing bearing, with the origin at the center of the backing bearing; B 16 (x) represents the difference in the backing bearing radius of group A; B 25 (x) represents the difference in the backing bearing radius of group B; B 34 (x) represents the difference in the backing bearing radius of group C; E is used to represent scientific notation.

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