Strip steel deviation control method, device and equipment and readable storage medium

Abstract

The embodiment of the present application provides a strip steel deviation control method, device, equipment and readable storage medium, through obtaining a first actual tension value of target strip steel at the entrance of a rolling mill and a second actual tension value at the exit of the rolling mill, based on the first actual tension value, the second actual tension value and a rolling tension setting value of the rolling mill, the initial tension change ratio of the rolling mill can be determined. If the initial tension change ratio is within a preset threshold range, the rolling mill is controlled to roll the target strip steel based on a preset rolling speed, and the current tension change ratio of the rolling mill is determined again. As long as the current tension change ratio is greater than the lower limit value of the preset threshold range, and the deviation of the target strip steel at the entrance of the rolling mill is detected, even if the rolling mill is not equipped with a shape meter, the rolling tension of the rolling mill can still be controlled to prevent the strip steel from further deviating, and the rolling mill can roll the strip steel as much as possible, thereby improving the stability of rolling of the rolling mill.

Description

Technical Field

[0001] This invention relates to the field of rolling technology, and in particular to a method, apparatus, equipment and readable storage medium for controlling strip deviation. Background Technology

[0002] Strip misalignment is one of the main causes of strip breakage in cold continuous rolling. When the raw material wedge shape exceeds the standard, the equipment precision is insufficient, or the rolling process is improper, strip misalignment and breakage are likely to occur, which reduces the stability of the cold continuous rolling process and affects rolling efficiency and yield.

[0003] For strip misalignment in cold continuous rolling mills, the conventional control method is to adjust it online using mill leveling techniques, taking into account the strip shape at the mill exit. However, since strip shape meters are typically only installed at the finished product stand exit in cold continuous rolling mills, and not at the non-finished product stands, this method is highly dependent on the strip shape meter and cannot perform online strip misalignment control on stands without one.

[0004] To ensure continuous and stable production of cold rolling mills, there is an urgent need for a new method to control strip deviation without relying on a strip shaper. Summary of the Invention

[0005] This invention provides a method, apparatus, equipment, and readable storage medium for controlling strip deviation, which solves the technical problem that existing rolling mills without a strip shape meter cannot accurately prevent strip deviation during the rolling process.

[0006] In a first aspect, the present invention provides a strip steel deviation control method through an embodiment of the invention, applied to a rolling mill. The method includes: acquiring a first actual tension value of the target strip steel at the mill inlet and a second actual tension value at the mill outlet; determining an initial tension change ratio of the rolling mill based on the first actual tension value, the second actual tension value, and a rolling tension setting value of the rolling mill; if the initial tension change ratio is within a preset threshold range, controlling the rolling mill to roll the target strip steel based on a preset rolling speed, and re-determining the current tension change ratio of the rolling mill; when the current tension change ratio is greater than the lower limit of the preset threshold range, and deviation of the target strip steel is detected at the mill inlet, controlling the current rolling tension of the rolling mill based on the rolling tension setting value and an anti-deviation coefficient.

[0007] Optionally, the rolling tension setting value includes a first tension setting value and a second tension setting value; determining the initial tension change ratio of the rolling mill based on the first actual tension value, the second actual tension value, and the rolling tension setting value of the rolling mill includes: determining the inlet tension change ratio of the rolling mill based on the ratio of the first actual tension value to the first tension setting value; determining the outlet tension change ratio of the rolling mill based on the ratio of the second actual tension value to the second tension setting value; the initial tension change ratio includes the inlet tension change ratio and the outlet tension change ratio.

[0008] Optionally, the method further includes: if the initial tension change ratio is less than or equal to the lower limit of the preset threshold range, then controlling the rolling mill to roll normally.

[0009] Optionally, the method further includes: if the initial tension change ratio is greater than the upper limit of the preset threshold range, then controlling the rolling mill to stop rolling.

[0010] Optionally, the method further includes: when the current tension change ratio is less than or equal to the lower limit of the preset threshold range, determining the current bending roll force setting value of the rolling mill based on the current rolling speed of the rolling mill; controlling the current bending roll force of the rolling mill according to the current bending roll force setting value; wherein, the greater the current rolling speed of the rolling mill, the greater the current bending roll force setting value.

[0011] Optionally, the method further includes: when the current tension change ratio is greater than the lower limit of the preset threshold range and the target strip is detected to be deviating at the mill exit, controlling the initial reduction rate of the mill based on the initial reduction rate of the mill and the deviation reduction rate adjustment amount.

[0012] Optionally, controlling the current rolling tension of the rolling mill based on the rolling tension setpoint and the anti-deviation coefficient includes: determining the current rolling tension setpoint of the rolling mill based on the product of the rolling tension setpoint and the anti-deviation coefficient; and controlling the current rolling tension of the rolling mill according to the current rolling tension setpoint.

[0013] The method of controlling the initial reduction rate of the rolling mill based on the initial reduction rate and the deviation reduction rate adjustment amount includes: determining the current reduction rate setting value of the rolling mill based on the difference between the initial reduction rate and the deviation reduction rate adjustment amount; and controlling the initial reduction rate of the rolling mill according to the current reduction rate setting value.

[0014] Secondly, through an embodiment of the present invention, the present invention provides a strip steel deviation control device, applied to a rolling mill, the device comprising:

[0015] The data acquisition unit is used to acquire the first actual tension value of the target strip at the mill inlet and the second actual tension value at the mill outlet.

[0016] The first calculation unit is used to determine the initial tension change ratio of the rolling mill based on the first actual tension value, the second actual tension value, and the rolling tension setting value of the rolling mill.

[0017] The second calculation unit is used to detect that when the initial tension change ratio is within a preset threshold range, control the rolling mill to roll the target strip based on a preset rolling speed, and redetermine the current tension change ratio of the rolling mill.

[0018] The rolling control unit is used to control the current rolling tension of the rolling mill based on the rolling tension setpoint and the anti-deviation coefficient when the current tension change ratio is greater than the lower limit of the preset threshold range and the target strip is detected to be deviating at the mill inlet.

[0019] Thirdly, through an embodiment of the present invention, a strip misalignment control device is provided, including a memory, a processor, and code stored in the memory and executable on the processor, wherein the processor executes the code to implement any of the embodiments in the first aspect.

[0020] Fourthly, through one embodiment of the present invention, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements any of the embodiments in the first aspect.

[0021] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0022] First, the first actual tension value of the target strip at the mill inlet and the second actual tension value at the mill outlet are obtained. Based on the first and second actual tension values ​​and the mill's rolling tension setting, the initial tension change ratio of the mill can be determined. Next, if the initial tension change ratio is within a preset threshold range, the mill is controlled to roll the target strip based on a preset rolling speed, and the current tension change ratio of the mill is redefined. Finally, if the current tension change ratio is greater than the lower limit of the preset threshold range, and deviation of the target strip is detected at the mill inlet, the current rolling tension of the mill is controlled based on the rolling tension setting and the anti-deviation coefficient. Even if the mill is not equipped with a shape gauge, it can still prevent further deviation of the strip by controlling the mill's rolling tension, ensuring normal strip rolling and improving the stability of the mill rolling process. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a flowchart of the strip misalignment control method in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the strip misalignment control device structure in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the strip misalignment control device structure in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of a computer-readable storage medium structure in an embodiment of the present invention. Detailed Implementation

[0028] This invention provides a method, apparatus, equipment, and readable storage medium for controlling strip deviation, which solves the technical problem that existing rolling mills without a strip shape meter cannot accurately prevent strip deviation during the rolling process.

[0029] The technical solution provided by the embodiments of the present invention is to solve the above-mentioned technical problems, and the general idea is as follows:

[0030] First, the first actual tension value of the target strip at the mill inlet and the second actual tension value at the mill outlet are obtained. Based on the first actual tension value, the second actual tension value and the mill's rolling tension setting value, the initial tension change ratio of the mill can be determined.

[0031] Next, if the initial tension change ratio is within the preset threshold range, the mill is controlled to roll the target strip based on the preset rolling speed, and the current tension change ratio of the mill is re-determined.

[0032] Finally, as long as the current tension change ratio is greater than the lower limit of the preset threshold range, and the target strip is detected to be deviating at the mill inlet, the current rolling tension of the mill is controlled based on the rolling tension setting value and the anti-deviation coefficient.

[0033] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0034] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0036] In a first aspect, the present invention provides a strip deviance control method through an embodiment of the present invention, which is applied to a rolling mill, specifically a cold continuous rolling mill unit that is not equipped with a strip shape meter.

[0037] Please see as follows Figure 1 As shown, the strip misalignment control method may include the following steps:

[0038] Step S101: Obtain the first actual tension value of the target strip at the mill inlet and the second actual tension value at the mill outlet.

[0039] Specifically, a tension meter can be used to obtain the first actual tension value and the second actual tension value.

[0040] In the specific implementation process, the tension gauge installed at the mill inlet can be used to obtain the first actual tension value of the target strip at the mill inlet; and the tension gauge installed at the mill outlet can be used to obtain the second actual tension value of the target strip at the mill outlet.

[0041] Specifically, the first actual tension value may include the actual tension value on the working side of the mill inlet and the actual tension value on the drive side of the mill inlet; the second actual tension value includes the actual tension value on the working side of the mill outlet and the actual tension value on the drive side of the mill outlet.

[0042] Step S102: Determine the initial tension change ratio of the rolling mill based on the first actual tension value, the second actual tension value, and the rolling tension setting value of the rolling mill.

[0043] Specifically, optionally, the rolling tension setting value may include a first tension setting value and a second tension setting value. The inlet tension change ratio of the rolling mill can be determined based on the ratio of the first actual tension value to the first tension setting value, and the outlet tension change ratio of the rolling mill can be determined based on the ratio of the second actual tension value to the second tension setting value.

[0044] The initial tension change ratio includes the inlet tension change ratio and the outlet tension change ratio. The inlet tension change ratio can be further divided into the tension change ratio on the working side of the mill inlet and the tension change ratio on the drive side of the mill inlet; the outlet tension change ratio can be further divided into the tension change ratio on the working side of the mill outlet and the tension change ratio on the drive side of the mill outlet.

[0045] In the specific implementation process, the change ratio of tension on the working side of the mill inlet can be calculated using the following formula:

[0046] F 张1 =1―F 实张1 / (F 设张1 / 2)

[0047] In the above formula, F 张1 F represents the percentage change in tension on the working side of the mill inlet. 实张1 F represents the actual tension value on the working side of the mill inlet. 设张1 Set the first tension value.

[0048] Similarly, the tension variation ratio on the drive side of the mill inlet can be calculated using the following formula:

[0049] F 张2 =1―F 实张2 / (F 设张1 / 2)

[0050] In the above formula, F 张2 F represents the ratio of tension change on the drive side of the rolling mill inlet. 实张2 F represents the actual tension value on the drive side of the rolling mill inlet. 设张1 Set the first tension value.

[0051] Furthermore, the percentage change in tension on the working side of the mill exit can be calculated using the following formula:

[0052] F 张3 =1―F 实张3 / (F 设张2 / 2)

[0053] In the above formula, F 张3 F represents the percentage change in tension on the working side of the rolling mill exit. 实张3 F represents the actual tension value on the working side of the mill exit. 设张2 Set the second tension value.

[0054] Furthermore, the percentage change in tension on the drive side of the mill exit can be calculated using the following formula:

[0055] F 张4 =1―F 实张4 / (F 设张2 / 2)

[0056] In the above formula, F 张4 F represents the ratio of tension change on the drive side of the rolling mill exit. 实张4 F represents the actual tension value on the drive side of the mill exit. 设张2 Set the second tension value.

[0057] Step S103: If the initial tension change ratio is within the preset threshold range, the mill is controlled to roll the target strip based on the preset rolling speed, and the current tension change ratio of the mill is re-determined.

[0058] Specifically, the preset threshold range can be set according to the actual application scenario. In one optional implementation, the preset threshold range can be (0.02, 0.5) or (0.1, 0.2). The preset rolling speed can be set according to the actual application scenario. In one optional implementation, the preset rolling speed can be the minimum speed for automatic control of flow rate and thickness per second. For example, the preset rolling speed can be set to 85 meters per minute.

[0059] Optionally, if the absolute value of the initial tension change ratio is within a preset threshold range, the mill can be controlled to roll the target strip based on the preset rolling speed, and the current tension change ratio of the mill can be redefined.

[0060] In practice, after the mill rolls the target strip based on the preset rolling speed, steps S101 to S102 can be re-executed to determine the current tension change ratio of the mill.

[0061] If the initial tension change ratio is less than or equal to the lower limit of the preset threshold range, or if the absolute value of the initial tension change ratio is less than or equal to the lower limit of the preset threshold range, then the mill will be controlled to roll normally.

[0062] If the initial tension change ratio is greater than the upper limit of the preset threshold range, or if the absolute value of the initial tension change ratio is greater than the upper limit of the preset threshold range, then the rolling mill will be stopped.

[0063] Step S104: When the current tension change ratio is greater than the lower limit of the preset threshold range and the target strip is detected to be deviating at the mill inlet, the current rolling tension of the mill is controlled based on the rolling tension setting value and the anti-deviation coefficient.

[0064] Specifically, the current rolling tension setting of the rolling mill can be determined based on the product of the rolling tension setting value and the anti-deviation coefficient, and then the current rolling tension of the rolling mill can be controlled according to the current rolling tension setting value.

[0065] It should be noted that since the target strip deviates at the mill inlet, the current rolling tension setting is for the mill inlet, and the current rolling tension setting is the inlet current rolling tension setting.

[0066] In the specific implementation process, the anti-deviation coefficient can be set according to the actual application scenario. In one optional implementation method, the anti-deviation coefficient can be set to 1.2.

[0067] For example, the current rolling tension setting can be calculated using the following formula:

[0068] F 当张 =F 设张 1×α

[0069] In the above formula, F 当张 F is the current rolling tension setting. 设张1 The first tension setting value is given, and α is the anti-deviation coefficient.

[0070] When the current tension change ratio is less than or equal to the lower limit of the preset threshold range, the current bending roll force setting value of the mill is determined based on the current rolling speed of the mill, and then the current bending roll force of the mill is controlled according to the current bending roll force setting value.

[0071] The higher the current rolling speed of the mill, the higher the current bending roll force setting.

[0072] In one alternative implementation, the deflection speed coupled bending roll force of the mill can be determined based on the current rolling speed of the mill, and the current bending roll force setting value can be determined based on the deflection speed coupled bending roll force and the initial bending roll force of the mill.

[0073] For example, the current bending roller force setting can be calculated using the following formula:

[0074] F 当弯 =F 初弯 +β

[0075] In the above formula, F 当弯 F is the current setting value for the bending roller force. 初弯 β is the initial bending force, and β is the bending force coupled with the deviation speed.

[0076] In the specific implementation process, the deviation speed coupled with the bending roller force can be determined based on the following Table 1:

[0077] Table 1. Schematic diagram of the relationship between the current rolling speed and the deflection speed coupled with the bending roll force.

[0078] Current rolling speed of the rolling mill (meters per minute) Misalignment speed coupled with bending roller force (tons) Minimum input speed for automatic control of flow rate and thickness per second. 0 Rolling speed a>150 1.5 150≤rolling speed<400 2 400≤rolling speed<600 3 600≤ Rolling speed 4

[0079] When the current tension change ratio is greater than the lower limit of the preset threshold range, and the target strip is detected to be deviating at the mill exit, the initial reduction rate of the mill is controlled based on the initial reduction rate of the mill and the deviating reduction rate adjustment amount.

[0080] It should be noted that the target strip deviated at the mill exit, but did not deviate at the mill inlet.

[0081] Specifically, the current reduction rate setting of the rolling mill can be determined based on the difference between the initial reduction rate and the deviation reduction rate adjustment, and then the initial reduction rate of the rolling mill can be controlled according to the current reduction rate setting.

[0082] In the specific implementation process, the deviation reduction rate adjustment amount can be set according to the actual application scenario. In one optional implementation method, the deviation reduction rate adjustment amount can be set to 2%.

[0083] For example, the current reduction rate setpoint can be calculated using the following formula:

[0084] F 当压 =F 初压 ―γ

[0085] In the above formula, F 当压 F is the current reduction rate setpoint. 初压 γ represents the initial reduction rate, and γ is the adjustment amount for the deviation reduction rate.

[0086] To better understand the above technical solution, examples are provided below to illustrate it.

[0087] First, suppose the actual tension value of the target strip at the mill inlet working side is 6.3 tons, the actual tension value at the mill inlet drive side is 7.6 tons, the actual tension value at the mill outlet working side is 15 tons, and the actual tension value at the mill outlet drive side is 16.6 tons. Suppose the first tension setting at the mill inlet is 14 tons, and the second tension setting at the mill outlet is 32 tons. Suppose the preset threshold range is (0.1, 0.2).

[0088] Using the above step S102, the tension change ratio on the working side of the mill inlet is calculated to be 0.1; the tension change ratio on the drive side of the mill inlet is -0.08; the tension change ratio on the working side of the mill outlet is 0.06; and the tension change ratio on the drive side of the mill outlet is -0.04.

[0089] It can be seen that if the initial tension change ratio is less than or equal to the lower limit of the preset threshold range, or the absolute value of the initial tension change ratio is less than or equal to the lower limit of the preset threshold range, then the rolling mill will be controlled to roll normally.

[0090] Second, suppose the actual tension value of the target strip at the mill inlet working side is 5.3 tons, the actual tension value of the target strip at the mill inlet drive side is 8.5 tons, the actual tension value of the target strip at the mill outlet working side is 12.1 tons, and the actual tension value of the target strip at the mill outlet drive side is 12 tons. Suppose the first tension setting value at the mill inlet is 14 tons, and the second tension setting value at the mill outlet is 32 tons. Suppose the preset threshold range is (0.1, 0.2).

[0091] Using the above step S102, the tension change ratio on the working side of the mill inlet is calculated to be 0.24; the tension change ratio on the drive side of the mill inlet is -0.21; the tension change ratio on the working side of the mill outlet is 0.24; and the tension change ratio on the drive side of the mill outlet is 0.25.

[0092] It can be seen that if the initial tension change ratio is greater than the upper limit of the preset threshold range, or the absolute value of the initial tension change ratio is greater than the upper limit of the preset threshold range, then the rolling mill will be stopped.

[0093] Third, assuming the actual tension value of the target strip at the mill inlet working side is 5.9 tons, the actual tension value at the mill inlet drive side is 7.8 tons, the actual tension value at the mill outlet working side is 14 tons, and the actual tension value at the mill outlet drive side is 18 tons. Assuming the first tension setting at the mill inlet is 14 tons and the second tension setting at the mill outlet is 32 tons. Assuming the preset threshold range is (0.1, 0.2).

[0094] Using the above step S102, the tension change ratio on the working side of the mill inlet is calculated to be 0.157; the tension change ratio on the drive side of the mill inlet is -0.11; the tension change ratio on the working side of the mill outlet is 0.12; and the tension change ratio on the drive side of the mill outlet is 0.12.

[0095] It can be seen that if the initial tension change ratio is within the preset threshold range, or the absolute value of the initial tension change ratio is within the preset threshold range, then the above step S103 is executed.

[0096] Assuming a preset rolling speed of 85 m / min, the actual tension values ​​of the target strip at the mill inlet working side are obtained as follows: 5.9 tons; at the mill inlet drive side: 7.8 tons; at the mill outlet working side: 14 tons; and at the mill outlet drive side: 18 tons. Assuming the first tension setting at the mill inlet is 14 tons and the second tension setting at the mill outlet is 32 tons, and assuming the preset threshold range is (0.1, 0.2), the actual tension values ​​are as follows:

[0097] Using the above step S102, the tension change ratio on the working side of the mill inlet is calculated to be 0.157; the tension change ratio on the drive side of the mill inlet is -0.11; the tension change ratio on the working side of the mill outlet is 0.12; and the tension change ratio on the drive side of the mill outlet is 0.12.

[0098] At this time, if the current tension change ratio is greater than the lower limit of the preset threshold range, and the absolute value of the current tension change ratio is greater than the lower limit of the preset threshold range, and if the target strip is detected to be deviating at the mill inlet, the current rolling tension of the mill is controlled based on the rolling tension setting value and the anti-deviating coefficient.

[0099] If the anti-deviation coefficient is 1.2, then the current rolling tension setting of the rolling mill is calculated to be 16.8 tons using the above step S104.

[0100] Assuming a preset rolling speed of 85 m / min, the actual tension values ​​of the target strip at the mill inlet working side are obtained as follows: 6.3 tons; at the mill inlet drive side: 7.6 tons; at the mill outlet working side: 14 tons; and at the mill outlet drive side: 18 tons. Assuming the first tension setting at the mill inlet is 14 tons and the second tension setting at the mill outlet is 32 tons, and assuming the preset threshold range is (0.1, 0.2), the actual tension values ​​are as follows:

[0101] Using the above step S102, the tension change ratio on the working side of the mill inlet is calculated to be 0.1; the tension change ratio on the drive side of the mill inlet is -0.08; the tension change ratio on the working side of the mill outlet is 0.12; and the tension change ratio on the drive side of the mill outlet is 0.12.

[0102] At this time, if the current tension change ratio is greater than the lower limit of the preset threshold range, and the absolute value of the current tension change ratio is greater than the lower limit of the preset threshold range, and if the target strip is detected to be deviating at the mill exit, the initial reduction rate of the mill is controlled based on the initial reduction rate of the mill and the deviation reduction rate adjustment amount.

[0103] If the reduction rate adjustment is 2%, then the current reduction rate setting of the mill is calculated to be 28% using the above step S104. The change in the target strip thickness caused by the change in the reduction rate of this pass will be absorbed and adjusted in the passes before and after it.

[0104] Secondly, based on the same inventive concept, this invention provides a strip steel deviation control device through an embodiment of the invention, applied to a rolling mill, as described in the reference. Figure 2 As shown, the strip misalignment control device includes:

[0105] The data acquisition unit 201 is used to acquire the first actual tension value of the target strip at the mill inlet and the second actual tension value at the mill outlet;

[0106] The first calculation unit 202 is used to determine the initial tension change ratio of the rolling mill based on the first actual tension value, the second actual tension value and the rolling tension setting value of the rolling mill.

[0107] The second calculation unit 203 is used to detect that the initial tension change ratio is within a preset threshold range, control the rolling mill to roll the target strip based on the preset rolling speed, and redetermine the current tension change ratio of the rolling mill.

[0108] The rolling control unit 204 is used to control the current rolling tension of the rolling mill based on the rolling tension set value and the anti-deviation coefficient when the current tension change ratio is greater than the lower limit of the preset threshold range and the target strip is detected to be deviating at the mill inlet.

[0109] As an optional implementation, the rolling tension setting value includes a first tension setting value and a second tension setting value; the first calculation unit 202 is specifically used to: determine the inlet tension change ratio of the rolling mill based on the ratio of the first actual tension value to the first tension setting value; determine the outlet tension change ratio of the rolling mill based on the ratio of the second actual tension value to the second tension setting value; the initial tension change ratio includes the inlet tension change ratio and the outlet tension change ratio.

[0110] As an optional implementation, the rolling control unit 204 is also used for:

[0111] When the initial tension change ratio is less than or equal to the lower limit of the preset threshold range, the mill is controlled to roll normally.

[0112] And when the initial tension change ratio exceeds the upper limit of the preset threshold range, the rolling mill is controlled to stop rolling.

[0113] As an optional implementation, the rolling control unit 204 is specifically used for:

[0114] When the current tension change ratio is less than or equal to the lower limit of the preset threshold range, the current bending roll force setting value of the rolling mill is determined based on the current rolling speed of the rolling mill; the current bending roll force of the rolling mill is controlled according to the current bending roll force setting value; wherein, the greater the current rolling speed of the rolling mill, the greater the current bending roll force setting value.

[0115] As an optional implementation, the rolling control unit 204 is specifically used for:

[0116] When the current tension change ratio is greater than the lower limit of the preset threshold range, and the target strip is detected to be deviating at the mill exit, the initial reduction rate of the mill is controlled based on the initial reduction rate of the mill and the deviating reduction rate adjustment amount.

[0117] Since the strip misalignment control device described in this embodiment is an electronic device used to implement the strip misalignment control method in this embodiment of the invention, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the strip misalignment control method described in this embodiment of the invention. Therefore, how the electronic device implements the method in this embodiment of the invention will not be described in detail here. Any electronic device used by those skilled in the art to implement the strip misalignment control method in this embodiment of the invention falls within the scope of protection of this invention.

[0118] Thirdly, based on the same inventive concept, the embodiments of the present invention provide a strip steel deviation control device that can be applied to rolling mills.

[0119] refer to Figure 3 As shown, the strip misalignment control device provided in this embodiment of the invention includes: a memory 301, a processor 302, and code stored in the memory and executable on the processor 302. When the processor 302 executes the code, it implements any of the embodiments of the strip misalignment control method described above.

[0120] Among them, Figure 3 In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 301. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 305 provides an interface between bus 300 and receiver 303 and transmitter 304. Receiver 303 and transmitter 304 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 301 can be used to store data used by processor 302 during operation.

[0121] Fourthly, such as Figure 4 As shown, based on the same inventive concept, the present invention provides a computer-readable storage medium 400 through an embodiment of the present invention, on which a computer program 401 is stored, which, when executed by a processor, implements any of the embodiments of the strip misalignment control method described above.

[0122] The technical solutions in the above embodiments of the present invention have at least the following technical effects or advantages:

[0123] By acquiring the first actual tension value of the target strip at the mill inlet and the second actual tension value at the mill outlet, and based on these values ​​and the mill's rolling tension setting, the initial tension change ratio of the mill can be determined. If the initial tension change ratio is within a preset threshold range, the mill is controlled to roll the target strip based on a preset rolling speed, and the current tension change ratio of the mill is redefined. As long as the current tension change ratio is greater than the lower limit of the preset threshold range, and if the target strip is detected to be deviating at the mill inlet, even if the mill is not equipped with a shape gauge, the rolling tension of the mill can still be controlled to prevent further deviation of the strip, ensuring normal rolling of the strip and improving the stability of the mill rolling process.

[0124] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable code.

[0125] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer 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 instructions. These computer 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, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0126] These computer instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function 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 function specified in one or more boxes.

[0127] These computer instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable 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.

[0128] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. 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 invention.

[0129] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for controlling strip misalignment, characterized in that, Applied to a rolling mill, the method includes: Obtain the first actual tension value of the target strip at the mill inlet and the second actual tension value at the mill outlet; Based on the first actual tension value, the second actual tension value, and the rolling tension setting value of the rolling mill, the initial tension change ratio of the rolling mill is determined; If the initial tension change ratio is within a preset threshold range, the mill is controlled to roll the target strip based on a preset rolling speed, and the current tension change ratio of the mill is re-determined. When the current tension change ratio is greater than the lower limit of the preset threshold range, and the target strip is detected to be deviating at the mill inlet, the current rolling tension of the mill is controlled based on the rolling tension setting value and the anti-deviating coefficient. The rolling tension setting value includes a first tension setting value and a second tension setting value; determining the initial tension change ratio of the rolling mill based on the first actual tension value, the second actual tension value, and the rolling tension setting value of the rolling mill includes: Based on the ratio of the first actual tension value to the first tension set value, the inlet tension change ratio of the rolling mill is determined; The exit tension change ratio of the rolling mill is determined based on the ratio of the second actual tension value to the second tension set value. The initial tension change ratio includes the inlet tension change ratio and the outlet tension change ratio; When the current tension change ratio is less than or equal to the lower limit of the preset threshold range, the current bending roll force setting value of the rolling mill is determined based on the current rolling speed of the rolling mill. The current bending roll force of the rolling mill is controlled according to the current bending roll force setting value; wherein, the greater the current rolling speed of the rolling mill, the greater the current bending roll force setting value; When the current tension change ratio is greater than the lower limit of the preset threshold range, and the target strip is detected to be deviating at the mill exit, the initial reduction rate of the mill is controlled based on the initial reduction rate of the mill and the deviating reduction rate adjustment amount. The control of the current rolling tension of the rolling mill based on the rolling tension setpoint and the anti-deviation coefficient includes: The current rolling tension setting value of the rolling mill is determined based on the product of the rolling tension setting value and the anti-deviation coefficient. The current rolling tension of the rolling mill is controlled according to the current rolling tension setting value; The method of controlling the initial reduction rate of the rolling mill based on the initial reduction rate and the deviation reduction rate adjustment amount includes: The current reduction rate setting value of the rolling mill is determined based on the difference between the initial reduction rate and the deviation reduction rate adjustment amount. The initial reduction rate of the rolling mill is controlled according to the current reduction rate setting value.

2. The method as described in claim 1, characterized in that, Also includes: If the initial tension change ratio is less than or equal to the lower limit of the preset threshold range, the mill is controlled to roll normally.

3. The method as described in claim 1, characterized in that, Also includes: If the initial tension change ratio is greater than the upper limit of the preset threshold range, the rolling mill is controlled to stop rolling.

4. A strip steel deviation control device, used to execute the strip steel deviation control method according to any one of claims 1-3, characterized in that, Applied to a rolling mill, the device includes: The data acquisition unit is used to acquire the first actual tension value of the target strip at the mill inlet and the second actual tension value at the mill outlet. The first calculation unit is used to determine the initial tension change ratio of the rolling mill based on the first actual tension value, the second actual tension value, and the rolling tension setting value of the rolling mill. The second calculation unit is used to detect that when the initial tension change ratio is within a preset threshold range, control the rolling mill to roll the target strip based on a preset rolling speed, and redetermine the current tension change ratio of the rolling mill. The rolling control unit is used to control the current rolling tension of the rolling mill based on the rolling tension setpoint and the anti-deviation coefficient when the current tension change ratio is greater than the lower limit of the preset threshold range and the target strip is detected to be deviating at the mill inlet.

5. A strip misalignment control device, comprising a memory, a processor, and code stored in the memory and executable on the processor, characterized in that, When the processor executes the code, it implements the method described in any one of claims 1-3.

6. 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 method described in any one of claims 1-3.

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