Strip shape reproduction control method and device

Abstract

The application discloses a strip plate shape reproduction control method and device, and relates to the technical field of plate shape straightening.The application controls the direction movement of the roll of the defect roll to the strip, forms the roll reduction, the movement distance of the intermediate roll is different from that of the two side rolls, the roll reduction of the intermediate roll is different from that of the two side rolls, after the strip is driven by the drive roll to move from the drive roll to the defect roll, different rolls apply different pressures to different parts of the strip, and the strip with plate shape defects is formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plate shape straightening technology, in particular to a strip plate shape reproduction control method and device. BACKGROUND

[0002] In the process of strip rolling, due to different steel compositions and rolling environments, strip plate defects may occur. In view of the strip plate defects, the metallurgical industry generally uses straightening process to eliminate defects. The straightening process uses bending and tensile deformation principle to straighten the strip. In actual production process, in order to reduce the cost of straightening, it is necessary to determine the optimal straightening process, which requires the strip with plate defects as the initial strip for simulation. SUMMARY

[0003] The present application provides a strip plate shape reproduction control method and device, which solves the technical problem of how to simulate the strip with plate defects.

[0004] In one aspect, the present application provides the following technical solutions:

[0005] A strip plate shape reproduction control method applied to a strip plate shape control system, the strip plate shape control system comprising a driving roller and a defect roller arranged in sequence, the defect roller comprising a plurality of rolling rollers arranged along the width direction of the strip, the method comprising:

[0006] After the strip passes through the middle of the defect roller, the defect roller is controlled to be tangent to the surface of the strip;

[0007] The rolling rollers of the defect roller are controlled to move in the direction of the strip, and the middle rolling roller of the defect roller has different movement distances from the two side rolling rollers;

[0008] The driving roller is controlled to drive the strip to move from the driving roller to the defect roller.

[0009] Optionally, the control of the rolling rollers of the defect roller to move in the direction of the strip comprises:

[0010] The rolling rollers of the defect roller are controlled to move in the direction of the strip based on the principle that the movement distance increases or decreases from the middle to the two sides of the defect roller.

[0011] Optionally, a first deflection roller and a bending roller group are arranged in sequence behind the defect roller, the bending roller group comprising an upper bending roller and a lower bending roller, and a second deflection roller and a straightening roller are arranged behind the bending roller group;

[0012] After the control of the driving roller to drive the strip to move from the driving roller to the defect roller, the method further comprises:

[0013] controlling the first turning roller, the upper bending roller, the second turning roller to be tangent to the upper surface of the strip steel, controlling the lower bending roller and the straightening roller to be tangent to the lower surface of the strip steel, and controlling the defect roller to be tangent to the surface of the strip steel;

[0014] controlling the lower bending roller and the straightening roller to move upward by a corresponding set distance;

[0015] applying a set tension to both ends of the strip steel in the length direction of the strip steel;

[0016] controlling the driving roller to drive the strip steel to move from the driving roller to the straightening roller;

[0017] fixing one end of the strip steel and controlling the driving roller, the first turning roller, the bending roller group, the second turning roller, and the straightening roller to be tangent to the surface of the strip steel.

[0018] Optionally, the set tension is determined by the formula wherein σ is the set tension, F is the tension applied to the strip steel, s is the width of the strip steel, and h is the thickness of the strip steel.

[0019] Optionally, the difference between the movement distances of two adjacent rollers of the defect roller is less than a set value.

[0020] Optionally, the cross-sectional shape of the roller of the defect roller includes a circle or a trapezoid.

[0021] In another aspect, the present application also provides the following technical solutions:

[0022] A strip steel shape reproduction control device applied to a strip steel shape control system, the strip steel shape control system including a driving roller and a defect roller arranged in sequence, the defect roller including a plurality of rollers arranged along the width direction of the strip steel, and the device including:

[0023] a first control module configured to control the defect roller to be tangent to the surface of the strip steel after the strip steel passes through the middle of the defect roller;

[0024] and control the rollers of the defect roller to move in the direction of the strip steel, the middle roller of the defect roller having a different movement distance from the two side rollers;

[0025] a second control module configured to control the driving roller to drive the strip steel to move from the driving roller to the defect roller.

[0026] Optionally, the first control module is specifically configured to:

[0027] control the rollers of the defect roller to move in the direction of the strip steel by a set distance based on the principle that the movement distance increases or decreases from the middle to the two sides of the defect roller.

[0028] On the other hand, the present invention also provides the following technical solution:

[0029] A computer device includes a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of a method for reproducing the shape of any strip steel plate.

[0030] On the other hand, the present invention also provides the following technical solution:

[0031] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a control method for reproducing the shape of any strip steel plate.

[0032] One or more technical solutions provided by this invention have at least the following technical effects or advantages:

[0033] This invention controls the movement of the defect roll towards the strip, resulting in a reduction in the roll's pressure. The movement distance between the middle roll and the two side rolls is different, thus the reduction in the middle roll and the two side rolls is different. After the drive roll moves the strip from the drive roll to the defect roll, different rolls will apply different pressures to different parts of the strip, resulting in strip with plate-shaped defects. Attached Figure Description

[0034] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the strip steel plate forming control system in an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the defect roller and strip steel before the defect roller moves in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the defect roller and the strip steel after the defect roller moves in an embodiment of the present invention;

[0038] Figure 4 This is a flowchart of the strip shape reproduction control method in an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of a strip steel with a corrugated edge defect in an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of a strip steel with a corrugated defect in the middle, as described in an embodiment of the present invention.

[0041] Figure 7 This is another flowchart of the strip shape reproduction control method in this embodiment of the invention;

[0042] Figure 8 This is a schematic diagram of the strip steel plate shape reproduction control device in an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 10-Strip steel; 20-Drive roll; 30-Defect roll; 301-Rolling roll; 40-First steering roll; 51-First upper bending roll; 52-First lower bending roll; 61-Second upper bending roll; 62-Second lower bending roll; 70-Second steering roll; 80-Straightening roll. Detailed Implementation

[0045] The embodiments of the present invention provide a strip shape reproduction control method and device, which solves the technical problem of how to simulate strips with shape defects.

[0046] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] like Figure 1 As shown, the strip shape control system of this invention includes a drive roller, a defect roller, a first steering roller, and a bending roller group arranged sequentially. A second steering roller and a straightening roller are provided after the bending roller group. The bending roller group includes an upper bending roller and a lower bending roller, which are positioned differently in the strip's movement direction. To improve the strip straightening effect, two sets of bending roller groups can be provided, namely a first bending roller group and a second bending roller group. The first bending roller group includes a first upper bending roller and a first lower bending roller, and the second bending roller group includes a second upper bending roller and a second lower bending roller. Multiple first and second steering rollers may also be provided.

[0048] Among them, the defective rollers include the upper roller and the lower roller ( Figure 1 (Not shown), the drive roller, the first lower bending roller, the second lower bending roller, and the lower roller of the straightening roller are all located below the strip, while the upper roller of the defect roller, the first steering roller, the first upper bending roller, the second upper bending roller, and the second steering roller are all located above the strip.

[0049] The defect roll consists of multiple rolls arranged along the width of the strip, both the upper and lower rolls. The cross-sectional shapes of these rolls can vary, such as circular, elliptical, or trapezoidal. A defect roll with a trapezoidal cross-sectional shape is an example. Figure 2 and Figure 3 As shown, Figure 2 The defect roll is only tangential to the strip surface. As the upper and lower rolls of the defect roll move towards the strip, they apply pressure to the strip, forming a... Figure 3 The cross-section of the strip shown is shown.

[0050] The strip plate shape reproduction control method of the embodiment of the present application is applied to a strip plate shape control system as shown in Figure 1 FIG. 1, and the method comprises the following steps. Figure 4

[0051] Step S1, after the strip passes through the middle of the defect roller, the defect roller is controlled to be tangent to the surface of the strip;

[0052] Step S2, the movement of the rolls of the defect roller in the direction of the strip is controlled, and the movement distances of the middle roll and the two side rolls of the defect roller are different;

[0053] Step S3, the driving roller is controlled to drive the strip to move from the driving roller to the defect roller.

[0054] Firstly, the defect roller is controlled to move to be tangent to the surface of the strip, and the driving roller is controlled to move upward to be tangent to the surface of the strip; then the movement of the rolls of the defect roller in the direction of the strip is controlled, that is, the upper roll of the defect roller is controlled to move downward, and the lower roll is controlled to move upward, so as to form the roll reduction, and the movement distances of the middle roll and the two side rolls are different, so the roll reductions of the middle roll and the two side rolls are different; the friction coefficient between the lower surface of the strip and the driving roller can be 0.1, and after the driving roller is controlled to drive the strip to move from the driving roller to the defect roller, different rolls will exert different pressures on different parts of the strip, so as to form the strip with plate shape defects, and the greater the roll reduction, the greater the pressure exerted by the roll on the strip, and the more obvious the plate shape defects of the strip; after the tail of the strip passes through the defect roller, the plate shape defect reproduction of the strip is completed. The movement speed of the strip can be 120-240 m / min.

[0055] It can be understood that if the difference between the roll reductions of adjacent rolls is too large, a step defect will be formed on the strip, which does not meet the requirements of the plate shape defects of the strip. In order to avoid the formation of the step defect on the strip, the difference between the movement distances of the adjacent two rolls of the defect roller can be set to be lower than a set value, that is, the difference between the roll reductions of the adjacent two rolls is lower than a set value, and the set value can be 0.4 mm.

[0056] In the embodiment of the present application, the plate shape defects of the strip include edge wave plate shape defects and middle wave plate shape defects, and in order to realize the edge wave plate shape defects and the middle wave plate shape defects, in step S2, the movement of the rolls of the defect roller in the direction of the strip can comprise: controlling the movement of the rolls of the defect roller in the direction of the strip to a set distance based on the principle that the movement distances of the rolls in the direction from the middle of the defect roller to the two sides increase or decrease. If the movement distances of the rolls in the direction from the middle of the defect roller to the two sides increase, the roll reductions of the two side rolls are large, the roll reduction of the middle roll is small, the elongation rates of the two sides of the strip in the width direction are larger than that of the middle, and the edge wave plate shape defects can be formed, as shown in Figure 5 ​If the movement distance of the rolling mill decreases from the middle to the two sides of the defect roller, the reduction of the rolling mill on the two sides is small, the reduction of the rolling mill in the middle is large, the elongation on the two sides of the strip width direction is smaller than the elongation in the middle, and the middle wave plate shape defect can be formed, as shown in FIG. 3. Figure 6 The more the number of the rolling mills of the defect roller is, the better the strip shape defect recurrence effect is. If the upper roller and the lower roller of the defect roller have three rolling mills, as shown in FIG. 4, when the edge wave plate shape defect is formed, the reduction (set distance) of the 1#, 2# and 3# rolling mills can be 0.8 mm, 0.6 mm and 0.3 mm respectively. Figure 3

[0057] After the strip with the plate shape defect is rolled, the strip with the plate shape defect needs to be straightened, therefore, after step S3, as shown in FIG. 5, the strip shape recurrence control method of the embodiment of the present application further comprises: Figure 7

[0058] Step S4, the first deflection roller, the upper bending roller, the second deflection roller are controlled to be tangent to the upper surface of the strip, the lower bending roller and the straightening roller are controlled to be tangent to the lower surface of the strip, and the defect roller is controlled to be tangent to the surface of the strip.

[0059] Step S5, the lower bending roller and the straightening roller are controlled to move upward by a corresponding set distance.

[0060] Step S6, a set tension is applied to the two ends of the strip in the length direction.

[0061] Step S7, the driving roller is controlled to drive the strip to move from the driving roller to the straightening roller.

[0062] Step S8, one end of the strip is fixed, and the driving roller, the first deflection roller, the bending roller group, the second deflection roller and the straightening roller are controlled to be tangent to the surface of the strip.

[0063] Step S4 controls the defect roller to be tangent to the surface of the strip to avoid the influence of the defect roller on the straightening of the strip. The set distance of the upward movement of the lower bending roller can be 24 mm, and the set distance of the upward movement of the straightening roller can be 30 mm. The upward force of the lower bending roller and the straightening roller on the defect strip simulates the bending tension of the strip, and the downward force of the first deflection roller, the upper bending roller and the second deflection roller on the defect strip is used to flatten the defect strip. The set tension in step S6 can be determined by the formula , where σ is the set tension, F is the tension applied to the strip, s is the width of the strip, and h is the thickness of the strip. When s = 1580 mm, h = 3 mm and F = 40 kN, the calculated set tension is about 4.2 N / mm 3 ​​Step S6 can simulate the tension of the strip steel. The driving roller drives the strip steel to move from the driving roller to the straightening roller until the tail of the strip steel passes through the last deflection roller. The first deflection roller, the bending roller set, the second deflection roller and the straightening roller can jointly act to straighten the defective strip steel. Step S8 is equivalent to fixing one end of the strip steel and keeping the other part of the strip steel in a free state for a period of time to complete the straightening process.

[0064] As shown in Figure 8 , the embodiment of the present application further provides a strip steel flatness reproduction control device applied to a strip steel flatness control system, comprising:

[0065] a first control module configured to control the defective roller to be tangent to the surface of the strip steel after the strip steel passes through the middle of the defective roller;

[0066] and control the movement of the roll of the defective roller to the direction of the strip steel, the movement distance of the middle roll of the defective roller being different from that of the two side rolls;

[0067] a second control module configured to control the driving roller to drive the strip steel to move from the driving roller to the defective roller.

[0068] Further, the first control module can be specifically configured to control the movement of the roll of the defective roller to the direction of the strip steel based on the principle that the movement distance increases or decreases along the direction from the middle of the defective roller to the two sides.

[0069] Further, the first control module can be further configured to control the first deflection roller, the upper bending roller and the second deflection roller to be tangent to the upper surface of the strip steel, control the lower bending roller and the straightening roller to be tangent to the lower surface of the strip steel, and control the defective roller to be tangent to the surface of the strip steel.

[0070] and control the corresponding set distance of the upward movement of the lower bending roller and the straightening roller.

[0071] The second control module can be further configured to control the driving roller to drive the strip steel to move from the driving roller to the straightening roller.

[0072] Further, the set tension can be determined by the formula , wherein σ is the set tension, F is the tension applied to the strip steel, s is the width of the strip steel, and h is the thickness of the strip steel.

[0073] Further, the difference between the movement distances of the two adjacent rolls of the defective roller is less than a set value.

[0074] Further, the cross-sectional shape of the roll of the defective roller can include a circle or a trapezoid.

[0075] Based on the same inventive concept as the strip shape reproduction control method, the embodiment of the present application also provides a computer device, comprising a memory, a processor and a computer program stored in the memory, the processor executes the computer program to realize the steps of any one of the strip shape reproduction control methods.

[0076] The bus architecture (represented by a bus) can include any number and kind of interconnecting buses and bridges, and the bus links various circuits such as the processor(s) represented by the processor(s), the memory represented by the memory, and various other circuits such as peripheral devices, voltage stabilizers, and power management circuits, which are well known in the art, and thus, are not further described herein. The bus interface provides an interface between the bus and the receiver and the transmitter. The receiver and the transmitter can be the same element, i.e., a transceiver, which provides a unit for communicating with various other devices over a transmission medium. The processor is responsible for managing the bus and general processing, while the memory can be used for storing data used by the processor in performing operations.

[0077] Since the computer device introduced in the embodiment of the present application is the computer device used to implement the strip shape reproduction control method in the embodiment of the present application, based on the strip shape reproduction control method introduced in the embodiment of the present application, those skilled in the art can understand the specific implementation of the computer device in the embodiment of the present application and various changes thereof, and thus, how the computer device realizes the method in the embodiment of the present application is not further described herein. As long as the computer device used to implement the strip shape reproduction control method in the embodiment of the present application is implemented by those skilled in the art, it belongs to the scope of the present application.

[0078] Based on the same inventive concept as the strip shape reproduction control method, the embodiment of the present application also provides a computer device, comprising a memory, a processor and a computer program stored in the memory, the processor executes the computer program to realize the steps of any one of the strip shape reproduction control methods.

[0079] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0080] The present application is described in reference to the flowchart illustrations and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. 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, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams block or blocks. Figure 1 Figure 1 Figure 1 Figure 1

[0081] Figure 1 Figure 1

[0082] While the preferred embodiments of the application have been described, it will be understood that those skilled in the art, both present and future, can make modifications and alterations to this application without departing from the spirit and scope of the application. Accordingly, it is intended to include all such modifications and alterations insofar as they come within the scope of the claims and the equivalents thereof.

[0083] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.​​​​​​​

Claims

1. A strip shape reproduction control method, applied to a strip shape control system, characterized in that, The strip shape control system includes a drive roll and a defect roll arranged sequentially, the defect roll comprising multiple rolls arranged along the width direction of the strip, and the method includes: After the strip passes through the middle of the defect roll, the defect roll is controlled to be tangent to the surface of the strip. The rolls controlling the defect rolls move toward the strip, and the movement distances of the middle rolls and the two side rolls of the defect rolls are different; The drive roller is controlled to move the strip from the drive roller to the defect roller.

2. The strip shape reproduction control method as described in claim 1, characterized in that, The movement of the roll controlling the defect roll toward the strip includes: The movement of the defective roll toward the strip is controlled by a predetermined distance based on the principle of increasing or decreasing the movement distance from the middle of the defective roll toward both sides.

3. The strip shape reproduction control method as described in claim 1, characterized in that, A first steering roller and a bending roller group are sequentially arranged after the defect roller. The bending roller group includes an upper bending roller and a lower bending roller. A second steering roller and a straightening roller are arranged after the bending roller group. After controlling the drive roller to move the strip from the drive roller to the defect roller, the method further includes: The first steering roller, the upper bending roller, and the second steering roller are controlled to be tangent to the upper surface of the strip steel; the lower bending roller and the straightening roller are controlled to be tangent to the lower surface of the strip steel; and the defect roller is controlled to be tangent to the surface of the strip steel. Control the lower bending roller and the straightening roller to move upward by a set distance; A set tension is applied to both ends of the strip along its length. Control the drive roller to move the strip from the drive roller to the straightening roller; One end of the strip is fixed, and the drive roller, the first steering roller, the bending roller group, the second steering roller, and the straightening roller are controlled to be tangent to the surface of the strip.

4. The strip shape reproduction control method as described in claim 3, characterized in that, The set tension is determined by the formula Let σ be the set tension, F be the tensile force applied to the strip, s be the width of the strip, and h be the thickness of the strip.

5. The strip shape reproduction control method as described in claim 1, characterized in that, The difference in movement distance between two adjacent rolls of the defective roll is lower than a set value.

6. The strip shape reproduction control method as described in claim 1, characterized in that, The cross-sectional shape of the defective roll includes circular or trapezoidal.

7. A strip shape reproduction control device, applied to a strip shape control system, characterized in that, The strip shape control system includes a drive roll and a defect roll arranged sequentially. The defect roll includes multiple rolls arranged along the width direction of the strip. The device includes: The first control module is used to control the defect roller to be tangent to the surface of the strip after the strip passes through the middle of the defect roller; And the rolls controlling the defect rolls move toward the strip, wherein the middle roll of the defect rolls moves at different distances than the rolls on both sides; The second control module is used to control the drive roller to move the strip from the drive roller to the defect roller.

8. The strip shape reproduction control device as described in claim 7, characterized in that, The first control module is specifically used for: The movement of the defective roll toward the strip is controlled by a predetermined distance based on the principle of increasing or decreasing the movement distance from the middle of the defective roll toward both sides.

9. A computer device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method according to any one of claims 1-6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method described in any one of claims 1-6.

Images