Strip steel plate shape reproduction control method and device

Abstract

The invention discloses a strip steel plate shape reproduction control method and device, and relates to the technical field of plate shape straightening. The roller of the defective roller is controlled to move towards the strip steel to form the rolling reduction of the roller, the rolling reduction of the middle roller and the rolling reduction of the two sides are different if the movement distances of the middle roller and the rolling reduction of the two sides are different, and after the driving roller is controlled to drive the strip steel to move from the driving roller to the defective roller, the different rollers can apply different pressures to different parts of the strip steel; and strip steel with plate shape defects is formed.

Description

Technical Field

[0001] The invention relates to the technical field of plate shape straightening, and in particular to a strip steel plate shape reproduction control method and device. Background Art

[0002] During the rolling process of strip steel, due to the different steel composition and rolling environment, the strip steel will have shape defects. In order to eliminate the shape defects of strip steel, the metallurgical industry generally adopts the straightening process to eliminate the defects. The straightening process uses the bending and stretching deformation principles to straighten the strip steel. In the actual production process, in order to reduce the cost of straightening, it is necessary to determine the optimal straightening process, which requires strip steel with shape defects as the initial strip steel for simulation. Summary of the invention

[0003] The present invention solves the technical problem of how to simulate a strip steel with plate shape defects by providing a strip steel shape reproduction control method and device.

[0004] On the one hand, the present invention provides the following technical solutions:

[0005] A strip shape reproduction control method is applied to a strip shape control system, wherein the strip shape control system comprises a driving roller and a defective roller arranged in sequence, wherein the defective roller comprises a plurality of rollers arranged along the width direction of the strip, and the method comprises:

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

[0007] Controlling the roller of the defective roller to move in the direction of the strip, wherein the movement distance of the middle roller of the defective roller is different from that of the rollers on both sides;

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

[0009] Optionally, controlling the roll of the defective roll to move toward the direction of the steel strip includes:

[0010] Based on the principle that the movement distance increases or decreases from the middle of the defective roller to both sides, the roller of the defective roller is controlled to move a set distance in the direction of the strip.

[0011] Optionally, a first steering roller and a bending roller group are sequentially arranged behind the defective roller, the bending roller group includes an upper bending roller and a lower bending roller, and a second steering roller and a straightening roller are arranged behind the bending roller group;

[0012] After controlling the driving roller to drive the strip to move from the driving roller to the defective roller, the method further includes:

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

[0014] Control the lower bending roller and the straightening roller to move upwards by a set distance;

[0015] Applying set tension to both ends of the strip in the length direction;

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

[0017] One end of the steel strip is fixed, and the driving 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 steel strip.

[0018] Optionally, the set tension is given by the formula Determine, σ is the set tension, F is the straightening force applied to the strip, s is the width of the strip, and h is the thickness of the strip.

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

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

[0021] On the other hand, the present invention also provides the following technical solutions:

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

[0023] A first control module is used to control the defective roller to be tangent to the surface of the strip after the strip passes through the middle of the defective roller;

[0024] and controlling the roller of the defective roller to move in the direction of the strip, wherein the movement distance of the middle roller of the defective roller is different from that of the rollers on both sides;

[0025] The second control module is used to control the driving roller to drive the strip to move from the driving roller to the defective roller.

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

[0027] Based on the principle that the movement distance increases or decreases from the middle of the defective roller to both sides, the roller of the defective roller is controlled to move a set distance in the direction of the strip.

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

[0029] A computer device comprises a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any strip shape reproduction control method.

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

[0031] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of any strip shape reproduction control method.

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

[0033] The present invention controls the roller of the defective roller to move in the direction of the strip, thereby forming a reduction amount of the roller. The movement distance of the middle roller and the rollers on both sides are different, and the reduction amount of the middle roller and the rollers on both sides are different. After the driving roller is controlled to drive the strip to move from the driving roller to the defective roller, different rollers will apply different pressures to different parts of the strip, thereby forming a strip with plate shape defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0035] Figure 1 Schematic diagram of a strip steel shape control system in an embodiment of the present invention;

[0036] Figure 2 Schematic diagram of a defective roller and a steel strip before the defective roller moves in an embodiment of the present invention;

[0037] Figure 3 Schematic diagram of a defective roller and a steel strip after the defective roller moves in an embodiment of the present invention;

[0038] Figure 4 Flow chart of a strip shape reproduction control method in an embodiment of the present invention;

[0039] Figure 5 Schematic diagram of a steel strip with edge corrugation defects in an embodiment of the present invention;

[0040] Figure 6 Schematic diagram of a steel strip with a middle corrugated plate-shaped defect in an embodiment of the present invention;

[0041] Figure 7 Another flow chart of the strip shape reproduction control method in an embodiment of the present invention;

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

[0043] Description of reference numerals:

[0044] 10-strip steel; 20-driving roller; 30-defective roller; 301-roller, 40-first steering roller; 51-first upper bending roller; 52-first lower bending roller; 61-second upper bending roller; 62-second lower bending roller; 70-second steering roller; 80-straightening roller. DETAILED DESCRIPTION

[0045] The embodiment of the present invention solves the technical problem of how to simulate a strip steel with a plate shape defect by providing a strip steel shape reproduction control method and device.

[0046] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] like Figure 1 As shown, the strip shape control system of the embodiment of the present invention includes a driving roller, a defect roller, a first steering roller, and a bending roller group arranged in sequence, and a second steering roller and a straightening roller are arranged behind the bending roller group. The bending roller group includes an upper bending roller and a lower bending roller, and the upper bending roller and the lower bending roller are located at different positions in the direction of movement of the strip. In order to improve the strip straightening effect, two sets of bending roller groups can be set, 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. There can also be multiple first steering rollers and second steering rollers.

[0048] Among them, the defective roller includes the upper roller and the lower roller ( Figure 1 (not shown), the driving 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, and 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 upper and lower rolls of the defective rolls both include a plurality of rolls arranged along the width direction of the strip. The cross-sectional shapes of the rolls can be various, such as circular, elliptical, and trapezoidal. The defective roll with a trapezoidal cross-sectional shape is as follows: Figure 2 and Figure 3 As shown, Figure 2 The defective roller is only tangent to the surface of the strip. The upper and lower rollers of the defective roller will exert pressure on the strip after moving in the direction of the strip, forming a Figure 3 Strip cross section shown.

[0050] The strip shape reproduction control method of the embodiment of the present invention is applied to Figure 1 Strip shape control system, such as Figure 4 As shown, the method includes:

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

[0052] Step S2, controlling the roller of the defective roller to move in the direction of the strip, and the movement distance of the middle roller of the defective roller is different from that of the rollers on both sides;

[0053] Step S3, controlling the driving roller to drive the strip to move from the driving roller to the defective roller.

[0054] First, the defective 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 roller of the defective roller is controlled to move in the direction of the strip, that is, the upper roller of the defective roller is controlled to move downward and the lower roller is controlled to move upward, so as to form the roller's depression amount. If the movement distance of the middle roller is different from that of the rollers on both sides, the depression amount of the middle roller and the rollers on both sides will be different; the friction coefficient between the lower surface of the strip and the driving roller can be 0.1. After the driving roller is controlled to drive the strip to move from the driving roller to the defective roller, different rollers will apply different pressures to different parts of the strip, forming a strip with a plate shape defect. The greater the roller's depression amount and the greater the pressure applied by the roller to the strip, the more obvious the plate shape defect of the strip. After the tail of the strip passes through the defective roller, the plate shape defect of the strip is reproduced. Among them, the movement speed of the strip can be 120-240m / min.

[0055] It is understandable that if the difference in the reduction of adjacent rolls is too large, a step-like defect will be formed on the strip, which does not meet the requirements of the strip shape defect. In order to avoid the formation of step-like defects on the strip, the difference in the movement distance of the two adjacent rolls of the defective roll can be set to be lower than the set value, that is, the difference in the reduction of the two adjacent rolls is lower than the set value, which can be 0.4mm.

[0056] In the embodiment of the present invention, the strip shape defects include edge wave shape defects and middle wave shape defects. To achieve edge wave shape defects and middle wave shape defects, in step S2, controlling the roller of the defective roller to move in the direction of the strip may include: controlling the roller of the defective roller to move a set distance in the direction of the strip based on the principle of increasing or decreasing the roller movement distance from the middle of the defective roller to both sides. Among them, if the roller movement distance from the middle of the defective roller to both sides increases, the pressing amount of the rollers on both sides is large, and the pressing amount of the middle roller is small, and the elongation on both sides of the strip width direction is larger than the elongation in the middle, which may form edge wave shape defects, such as Figure 5As shown in the figure; if the movement distance of the rollers decreases from the middle to the sides of the defective roller, the pressure reduction of the rollers on both sides is small, and the pressure reduction of the middle roller is large. The elongation on both sides of the strip width direction is smaller than that in the middle, and a corrugated plate defect in the middle may be formed, such as Figure 6 As shown. The more rolls of the defective roll, the better the strip shape defect reproduction effect. If the upper roll and the lower roll of the defective roll both have 3 rolls, such as Figure 3 As shown, when edge wave plate-shaped defects are formed, the pressing amount (set distance) of the 1#, 2#, and 3# rollers can be 0.8mm, 0.6mm, and 0.3mm respectively.

[0057] After rolling the strip with plate shape defects, the strip with plate shape defects needs to be straightened. Therefore, after step S3, Figure 7 As shown, the strip shape reproduction control method of the embodiment of the present invention also includes:

[0058] Step S4, controlling the first steering roller, the upper bending roller, and the second steering roller to be tangent to the upper surface of the steel strip, controlling the lower bending roller and the straightening roller to be tangent to the lower surface of the steel strip, and controlling the defective roller to be tangent to the surface of the steel strip;

[0059] Step S5, controlling the lower bending roller and the straightening roller to move upward by a set distance corresponding to the movement;

[0060] Step S6, applying a set tension to both ends of the strip in the length direction;

[0061] Step S7, controlling the driving roller to drive the strip to move from the driving roller to the straightening roller;

[0062] Step S8, fixing one end of the steel strip, and controlling the driving roller, the first steering roller, the bending roller group, the second steering roller, and the straightening roller to be tangent to the surface of the steel strip.

[0063] Step S4 controls the defective roller to be tangent to the surface of the strip to prevent the defective roller from affecting the straightening of the strip. Step S5 controls the setting distance of the lower bending roller to move upward to 24 mm, and controls the setting distance of the straightening roller to move upward to 30 mm. The lower bending roller and the straightening roller apply an upward force to the defective strip to simulate the bending tension of the strip. The first steering roller, the upper bending roller, and the second steering roller apply a downward force to the defective strip to flatten the defective strip. The setting tension in step S6 can be expressed by the formula Determine, σ is the set tension, F is the straightening force applied to the strip, s is the width of the strip, and h is the thickness of the strip; if s = 1580mm, h = 3mm, and F = 40kN, the calculated set tension is approximately 4.2N / mm 3Step S6 can simulate the tension of the strip. The driving roller is controlled to drive the strip to move from the driving roller to the straightening roller until the tail of the strip passes through the last turning roller. The first turning roller, the bending roller group, the second turning roller, and the straightening roller can work together to straighten the defective strip. Step S8 is equivalent to fixing one end of the strip and making the other parts of the strip free for a period of time to complete the straightening process.

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

[0065] The first control module is used to control the defective roller to be tangent to the surface of the strip after the strip passes through the middle of the defective roller;

[0066] and controlling the roll of the defective roll to move in the direction of the strip, wherein the movement distance of the middle roll of the defective roll is different from that of the rolls on both sides;

[0067] The second control module is used to control the driving roller to drive the strip to move from the driving roller to the defective roller.

[0068] Furthermore, the first control module can be specifically used to control the defective roller to move a set distance toward the strip based on the principle of increasing or decreasing the moving distance from the middle to both sides of the defective roller.

[0069] Furthermore, the first control module can also be used to: control the first steering roller, the upper bending roller, and the second steering roller to be tangent to the upper surface of the steel strip, control the lower bending roller and the straightening roller to be tangent to the lower surface of the steel strip, and control the defective roller to be tangent to the surface of the steel strip;

[0070] and controlling the set distance corresponding to the upward movement of the lower bending roller and the straightening roller;

[0071] The second control module can also be used to control the driving roller to drive the strip to move from the driving roller to the straightening roller.

[0072] Furthermore, the tension can be set by the formula Determine, σ is the set tension, F is the straightening force applied to the strip, s is the width of the strip, and h is the thickness of the strip.

[0073] Furthermore, the difference in movement distances between two adjacent rollers of the defective roller is lower than a set value.

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

[0075] Based on the same inventive concept as the strip shape reproduction control method mentioned above, an embodiment of the present invention also provides a computer device, including a memory, a processor and a computer program stored in the memory, and the processor executes the computer program to implement the steps of any of the strip shape reproduction control methods mentioned above.

[0076] Among them, the bus architecture (represented by the bus), the bus can include any number of interconnected buses and bridges, and the bus links various circuits including one or more processors represented by the processor and memory represented by the memory. The bus can also link various other circuits such as peripherals, voltage regulators, and power management circuits together, which are all well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the receiver and transmitter. The receiver and transmitter can be the same element, namely a transceiver, which provides a unit for communicating with various other devices on a transmission medium. The processor is responsible for managing the bus and general processing, while the memory can be used to store data used by the processor when performing operations.

[0077] Since the computer device introduced in the embodiment of the present invention is a computer device used to implement the strip shape reproduction control method in the embodiment of the present invention, based on the strip shape reproduction control method introduced in the embodiment of the present invention, the technical personnel in the field can understand the specific implementation of the computer device in the embodiment of the present invention and its various variations, so how the computer device implements the method in the embodiment of the present invention is not described in detail here. As long as the technical personnel in the field implement the computer device used in the strip shape reproduction control method in the embodiment of the present invention, it belongs to the scope of protection of the present invention.

[0078] Based on the same inventive concept as the above-mentioned strip shape reproduction control method, the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the above-mentioned strip shape reproduction control methods are implemented.

[0079] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may 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-ROM, optical storage, etc.) containing computer-usable program code.

[0080] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including an instruction device, which implements the functions specified in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0081] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0082] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0083] 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 equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A strip steel flatness reproduction control method, applied to a strip steel flatness control system, characterized in that: The strip shape control system comprises a driving roller and a defective roller arranged in sequence, wherein the defective roller comprises a plurality of rollers arranged along the width direction of the strip, and the method comprises: After the strip passes through the middle of the defective roller, the defective roller is controlled to be tangent to the surface of the strip; Controlling the roller of the defective roller to move in the direction of the strip, wherein the movement distance of the middle roller of the defective roller is different from that of the rollers on both sides; The driving roller is controlled to drive the strip to move from the driving roller to the defective roller.

2. The strip shape reproduction control method according to claim 1, characterized in that: The step of controlling the roll of the defective roll to move toward the direction of the steel strip comprises: Based on the principle that the movement distance increases or decreases from the middle of the defective roller to both sides, the roller of the defective roller is controlled to move a set distance in the direction of the strip.

3. The strip shape reproduction control method according to claim 1, characterized in that: A first steering roller and a bending roller group are sequentially arranged behind the defective roller, the bending roller group includes an upper bending roller and a lower bending roller, and a second steering roller and a straightening roller are arranged behind the bending roller group; After controlling the driving roller to drive the strip to move from the driving roller to the defective roller, the method further includes: Controlling the first steering roller, the upper bending roller, and the second steering roller to be tangent to the upper surface of the steel strip, controlling the lower bending roller and the straightening roller to be tangent to the lower surface of the steel strip, and controlling the defect roller to be tangent to the surface of the steel strip; Control the lower bending roller and the straightening roller to move upwards by a set distance; Applying set tension to both ends of the strip in the length direction; Controlling the driving roller to drive the strip to move from the driving roller to the straightening roller; One end of the steel strip is fixed, and the driving 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 steel strip.

4. The strip shape reproduction control method according to claim 3, characterized in that: The set tension is given by the formula Determine, σ is the set tension, F is the straightening force applied to the strip, s is the width of the strip, and h is the thickness of the strip.

5. The strip shape reproduction control method according to claim 1, characterized in that: The difference between the movement distances of two adjacent rollers of the defective roller is lower than a set value.

6. The strip shape reproduction control method according to claim 1, characterized in that: The cross-sectional shape of the roll of the defective roll includes a circle or a trapezoid.

7. A strip steel shape reproduction control device, applied to a strip steel shape control system, characterized in that: The strip shape control system comprises a driving roller and a defective roller which are arranged in sequence, wherein the defective roller comprises a plurality of rollers arranged along the width direction of the strip, and the device comprises: A first control module is used to control the defective roller to be tangent to the surface of the strip after the strip passes through the middle of the defective roller; and controlling the roller of the defective roller to move in the direction of the strip, wherein the movement distance of the middle roller of the defective roller is different from that of the rollers on both sides; The second control module is used to control the driving roller to drive the strip to move from the driving roller to the defective roller.

8. The strip shape reproduction control device according to claim 7, characterized in that: The first control module is specifically used to: Based on the principle that the movement distance increases or decreases from the middle of the defective roller to both sides, the roller of the defective roller is controlled to move a set distance in the direction of the strip.

9. A computer device, characterized in that: The invention comprises 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 to 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, the steps of the method according to any one of claims 1 to 6 are implemented.

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