CN-122007159-A - Rolling method, device, medium and equipment for optimizing plane shape of steel plate

CN122007159ACN 122007159 ACN122007159 ACN 122007159ACN-122007159-A

Abstract

The application discloses a rolling method, a rolling device, a rolling medium and rolling equipment for optimizing the plane shape of a steel plate. The method comprises the steps of carrying out longitudinal and transverse rolling on a plate blank based on a plane shape control parameter of longitudinal and transverse rolling for a preset number of times before carrying out longitudinal and transverse rolling on the plate blank so as to adjust the stretching ratio and the extending ratio of the plate blank before entering a longitudinal and transverse rolling stage, wherein the preset number of times is determined based on the original stretching ratio and the original extending ratio of the plate blank and the original stretching ratio and the original extending ratio of the plate blank when entering the longitudinal and transverse rolling stage, and the plane shape control parameter of longitudinal and transverse rolling is determined based on the deformation amount of a rolled piece obtained after each longitudinal and transverse rolling, and the original stretching ratio is larger than or equal to 1.8. The method can lead the new target widening ratio and the new target extending ratio which are finally obtained before the longitudinal and transverse rolling strategy to be in a reasonable range interval, effectively control the plane shape and improve the rectangular degree of the final finished steel plate.

Inventors

JIAO ZHIJIE
WANG ZHIQIANG
LIU CAIWEI
HE CHUNYU
ZHAO ZHONG
WU ZHIQIANG

Assignees

东北大学

Dates

Publication Date: 20260512
Application Date: 20260415

Claims (10)

1. A rolling method for optimizing a planar shape of a steel sheet, the method comprising: Calculating an original widening ratio of the slab based on the original size of the slab and the target size of the finished product; determining an initial widening ratio of a plate blank when the plate blank enters a longitudinal and transverse rolling stage based on the target size of the finished product and control parameters of the longitudinal and transverse rolling stage; determining the preset times of longitudinal and transverse rolling based on the ratio between the original stretching ratio and the initial stretching ratio; Before longitudinal and transverse rolling is carried out on the plate blank, longitudinal and transverse rolling is carried out on the plate blank for the preset times based on a plane shape control parameter of longitudinal and transverse rolling, so that the widening ratio and the extending ratio of the plate blank before the plate blank enters a longitudinal and transverse rolling stage are adjusted; the plane shape control parameter of the longitudinal and transverse rolling is determined based on the deformation of the rolled piece obtained after each longitudinal and transverse rolling, and the original widening ratio is greater than or equal to 1.8.
2. The rolling method for optimizing the planar shape of a steel sheet according to claim 1, further comprising: calculating an original extension ratio of the slab based on the original size of the slab and the target size of the finished product; And determining the initial extension ratio of the plate blank when the plate blank enters the longitudinal and transverse rolling stage based on the target size of the finished product and the control parameters of the longitudinal and transverse rolling stage.
3. The rolling method for optimizing a planar shape of a steel sheet according to claim 1, wherein the determining the preset number of times based on the ratio between the original stretch ratio and the initial stretch ratio includes: calculating the variation between the original stretching ratio and the initial stretching ratio; Calculating the ratio of the variation to a preset broadening optimization coefficient, and taking up a positive integer to obtain the preset times.
4. The rolling method for optimizing the planar shape of a steel sheet according to claim 1, further comprising: Based on the stage size of the rolled piece obtained after the i-1 th longitudinal and transverse rolling, the initial size of the plate blank before entering the longitudinal and transverse rolling stage and the preset times, respectively calculating the stage size of the rolled piece obtained after the i-th longitudinal and transverse rolling; Determining the stage widening ratio and the stage extending ratio of the ith longitudinal and transverse rolling based on the stage size, the initial size and the preset times of the rolled piece obtained after the ith longitudinal and transverse rolling; and respectively determining plane shape control parameters conforming to the stage widening ratio and the stage extending ratio of the corresponding longitudinal and transverse rolling stage based on the stage size.
5. The method for rolling a planar shape of an optimized steel sheet according to claim 4, wherein, The stage size or the original size of the slab or the target size of the finished product comprises thickness, width and length; The step size of the rolled piece is obtained based on the i-1 th longitudinal and transverse rolling, the initial size of the longitudinal and transverse rolling and the preset times, the step size of the rolled piece is obtained based on the i-th longitudinal and transverse rolling, and the following calculation formula is adopted: ; ; ; In the formula, Is the original thickness of the slab; is the original width of the slab; is the original length of the slab; The thickness of the rolled piece is obtained after the ith longitudinal and transverse rolling; the width of the rolled piece is obtained after the ith longitudinal and transverse rolling; the length of the rolled piece is obtained after the ith longitudinal and transverse rolling; the thickness of the rolled piece is obtained after the i-1 th longitudinal and transverse rolling; The width of the rolled piece is obtained after the i-1 th longitudinal and transverse rolling; The length of the rolled piece is obtained after the i-1 th longitudinal and transverse rolling; The initial width of the slab before entering the longitudinal and transverse rolling stage; The initial length of the slab before entering the longitudinal and transverse rolling stage; Is a preset number of times.
6. The rolling method for optimizing the planar shape of a steel sheet according to claim 1, further comprising: Based on the original size of the slab and the original size of the slab when entering a longitudinal and transverse rolling stage, the original size is evenly distributed to each longitudinal and transverse rolling stage, and the stage widening ratio and the stage extending ratio of each longitudinal and transverse rolling stage are determined; Calculating a stage size of each longitudinal and transverse rolling based on the initial size, the stage widening ratio and the stage extending ratio; and respectively determining plane shape control parameters conforming to the stage widening ratio and the stage extending ratio of the corresponding longitudinal and transverse rolling stage based on the stage size.
7. The method for rolling an optimized steel sheet planar shape as claimed in any one of claims 4 to 6, wherein, The longitudinal and transverse rolling comprises a forming stage and a widening stage; The plane shape control parameters comprise a stable state length, an unsteady state horizontal length and a plane shape control height of the platform section; and respectively determining plane shape control parameters conforming to the stage widening ratio and the stage extending ratio of the corresponding longitudinal and transverse rolling stages based on the stage sizes, and adopting the following calculation formula: ; ; ; ; In the formula, Is the unsteady horizontal length of the forming stage in the ith longitudinal and transverse rolling; The non-steady horizontal length of the widening stage in the ith longitudinal and transverse rolling; controlling the height for the plane shape of the forming stage in the ith longitudinal and transverse rolling; controlling the height of the plane shape of the widening stage in the ith longitudinal and transverse rolling; Is a horizontal speed; Is a vertical velocity; the step widening ratio of the ith longitudinal and transverse rolling; the stage elongation ratio of the ith longitudinal and transverse rolling is obtained.
8. A rolling device for optimizing the planar shape of a steel sheet, said device comprising: A simulation calculation module for calculating an original spread ratio of a slab based on an original size of the slab and a target size of a finished product, and Determining initial widening ratio of the plate blank when entering the longitudinal and transverse rolling stage based on the target size of the finished product and the control parameters of the longitudinal and transverse rolling stage, and Determining the preset times of longitudinal and transverse rolling based on the ratio between the original stretching ratio and the initial stretching ratio; The control module is used for carrying out longitudinal and transverse rolling on the plate blank for preset times based on the plane shape control parameters of the longitudinal and transverse rolling before the plate blank is subjected to longitudinal and transverse rolling so as to adjust the widening ratio and the extension ratio before the plate blank enters the longitudinal and transverse rolling stage; the plane shape control parameter of the longitudinal and transverse rolling is determined based on the deformation of the rolled piece obtained after each longitudinal and transverse rolling, and the original widening ratio is greater than or equal to 1.8.
9. A readable storage medium having stored thereon a program or instructions, which when executed by a processor, implements the rolling method of optimizing a planar shape of a steel sheet according to any one of claims 1 to 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the rolling method of optimizing the planar shape of a steel sheet according to any one of claims 1 to 7 when executing the program.

Description

Rolling method, device, medium and equipment for optimizing plane shape of steel plate Technical Field The application relates to the technical field of metal rolling, in particular to a rolling method, a rolling device, a rolling medium and rolling equipment for optimizing the plane shape of a steel plate. Background In the field of metal press working, the rolling of a medium plate is a process of rolling a thick-gauge slab into a target-size steel plate. In the rolling process, when a thick-specification plate blank is used for producing a steel plate with a large stretching ratio, the matching of the stretching ratio and the extension ratio is not in a reasonable range, so that the plane shape of a final finished steel plate can be influenced, the width deviation between the head and the tail of the finished steel plate and the middle of the finished steel plate is overlarge, the trimming amount is increased, and the yield is seriously influenced. In the prior art, two strategies of transverse rolling and longitudinal rolling and transverse rolling are mainly adopted. Compared with transverse and longitudinal rolling, the transverse and longitudinal rolling optimizes blank state and metal flow condition through longitudinal rolling, so that the matching of widening and extending is more reasonable, the width deviation is reduced, the rectangular degree of the steel plate can be improved more effectively, and the shape accuracy is improved. However, as the slab specifications expand, the thickness increases, and the stretch ratio and the extension ratio break through the limits of traditional experience. Meanwhile, due to the limitation of the capacity of the rolling mill, the traditional plane shape control effect reaches the upper limit, the rectangular degree cannot be further improved, and the cutting loss cannot be further reduced. Disclosure of Invention In view of the above, the application provides a rolling method, a device, a medium and equipment for optimizing the planar shape of a steel plate, which are capable of effectively controlling the planar shape, improving the rectangular degree of a final finished steel plate and improving the yield by adding longitudinal and transverse rolling for a preset number of times before longitudinal and transverse rolling and adjusting the widening ratio and the extending ratio to a reasonable range. According to a first aspect of the present application, there is provided a rolling method for optimizing a planar shape of a steel sheet, the method comprising: Calculating an original widening ratio of the slab based on the original size of the slab and the target size of the finished product; determining an initial widening ratio of a plate blank when the plate blank enters a longitudinal and transverse rolling stage based on the target size of the finished product and control parameters of the longitudinal and transverse rolling stage; determining the preset times of longitudinal and transverse rolling based on the ratio between the original stretching ratio and the initial stretching ratio; before longitudinal and transverse rolling is carried out on the plate blank, longitudinal and transverse rolling is carried out on the plate blank for the preset times based on a plane shape control parameter of longitudinal and transverse rolling, so that the widening ratio and the extending ratio of the plate blank before entering the longitudinal and transverse rolling stage are adjusted; the plane shape control parameter of the longitudinal and transverse rolling is determined based on the deformation of the rolled piece obtained after each longitudinal and transverse rolling, and the original widening ratio is greater than or equal to 1.8. Optionally, the rolling method for optimizing the planar shape of the steel plate further comprises: Calculating the original extension ratio of the slab based on the original size of the slab and the target size of the finished product; And determining the initial extension ratio of the plate blank when the plate blank enters the longitudinal and transverse rolling stage based on the target size of the finished product and the control parameters of the longitudinal and transverse rolling stage. Optionally, the determining the preset number of times based on the ratio between the original stretching ratio and the initial stretching ratio includes: calculating the variation between the original stretching ratio and the initial stretching ratio; Calculating the ratio of the variation to a preset broadening optimization coefficient, and taking up a positive integer to obtain the preset times. Optionally, the rolling method for optimizing the planar shape of the steel plate further comprises: The method comprises the steps of obtaining a stage size of a rolled piece after i-1 th longitudinal and transverse rolling, respectively calculating the stage size of the rolled piece after i-th longitudinal and transverse rolling based on th