Methods, devices, media, and reversible rolling mills for strip steel shape control
By calculating the similarity between the strip shape deviation and the standard strip, and combining hydraulic cylinder leveling, roll adjustment, and roll crown adjustment, the problem of strip shape control during strip rolling was solved, achieving efficient and precise strip shape control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
- Filing Date
- 2023-07-10
- Publication Date
- 2026-05-26
Smart Images
Figure CN116984381B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of strip rolling technology, and in particular to a method for controlling the shape of strip during strip rolling. Background Technology
[0002] The 20-roll single-stand reversible rolling mill is set up between the uncoiler and the coiler. Before rolling begins, the steel coil is loaded onto the mandrel of the coiler. The strip head is fed into the mill through the uncoiler operation, and then the coiler on the other side coils the strip head before rolling. The mill stops after each rolling pass, and the next pass is started after switching passes. Due to the production process characteristics of oriented strip steel, the strip is relatively thin and has a high silicon content, resulting in high hardness. Some passes involve high-temperature rolling, and the process is reversible. The production process involves frequent stops and acceleration / deceleration. During daily rolling, the actual strip shape changes rapidly, and the shape deviation fluctuates greatly, making it difficult to adjust. During the rolling process, there are frequent instances of large deviations between the actual and target strip shapes, resulting in poor strip shape. Summary of the Invention
[0003] The purpose of this application is to provide a method for controlling the shape of strip steel during rolling. This application can improve the control of strip steel shape and reduce the defect rate of strip steel rolling.
[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.
[0005] According to one aspect of the embodiments of this application, a strip shape control method for strip rolling is provided. The method includes: acquiring standard strip shape deviations and standard speed indicators at different positions of a standard strip at intervals, acquiring the corresponding standard strip adjustment methods and saving them as the Gth data entry; acquiring the current strip shape deviation and current speed indicator; acquiring the Gth data entry using the current strip shape deviation and current speed indicator, and calculating the similarity between the current strip shape deviation and the standard strip shape deviation; if the similarity is less than a set value, adjusting the current strip using the standard strip adjustment method of the Gth data entry; if the similarity is greater than the set value, selecting the current strip adjustment method based on the current strip shape leveling deviation value and the current values of the four outer channels of the edge, according to the set strip adjustment method.
[0006] In one embodiment of this application, based on the aforementioned scheme, obtaining the current strip shape deviation value and current speed indicator includes: obtaining the current acceleration of the strip, distinguishing between constant speed, acceleration, and deceleration; obtaining the current rolling pass and current rolling speed of the strip; obtaining a preset target strip shape flatness based on the current acceleration, current rolling pass, and current rolling speed of the strip; reading the current strip shape flatness of the strip, and calculating the difference between the current strip shape flatness and the target strip shape flatness to obtain the current strip shape deviation value.
[0007] In one embodiment of this application, based on the aforementioned scheme, the similarity between the current plate shape deviation and the standard plate shape deviation is calculated using the following formula:
[0008] ∑|DS k -DS n |+……+|DS 1‘ -DS1|+|WS k -WS n |+……+|WS 1‘ -WS1|=Δ G
[0009] Where k is the maximum effective strip shape channel of standard strip steel, DS k WS represents the shape deviation value of the k-th strip shape measuring ring on the DS side covered by the standard strip width. k The strip shape deviation value of the k-th strip shape measuring ring on the WS side covered by the standard strip width, where n is the current maximum effective strip shape channel, and DS n WS represents the strip shape deviation at the nth measuring ring on the DS side. n This represents the strip shape deviation of the current strip at the nth measuring ring on the WS side.
[0010] In one embodiment of this application, based on the aforementioned scheme, if the similarity is less than a set value, after adjusting the current strip using the standard strip adjustment method of the Gth data, the method further includes:
[0011] The current plate shape deviation is calculated using the following formula.
[0012]
[0013] The standard plate shape deviation is calculated using the following formula.
[0014]
[0015] Obtain the current plate shape deviation value εN for the next 3 scan cycles:
[0016]
[0017] Obtain the standard plate shape deviation value εN for the next 3 scanning cycles:
[0018]
[0019] like If εN < εG, then the current strip shape deviation, current speed indicator, and current strip adjustment method will be updated and saved as the Gth data entry.
[0020] In one embodiment of this application, based on the foregoing scheme,
[0021] The current plate leveling deviation value is calculated using the following formula:
[0022]
[0023] Where ∑level is the current plate shape leveling deviation value, WS n DS represents the actual flatness value of the nth measuring ring on the operating side covered by the strip. n Let I' be the actual flatness value of the nth measuring ring on the transmission side covered by the strip, and In be the target flatness value of the corresponding measuring ring. n To set a flatness value for the secondary optimization of the target plate flatness value of the nth measurement ring based on steel type, speed, pass number, and speed status.
[0024] In one embodiment of this application, based on the aforementioned scheme, if the similarity is greater than a set value, then according to the current strip shape leveling deviation value and the current value of the four channels on the outer side of the edge, the current strip adjustment method is selected according to the set strip adjustment method, including: if the current DS strip shape deviation value is positive and the current WS strip shape deviation value is negative, then when ∑level is ≥30I-U, the hydraulic cylinder leveling method is used, and when ∑level is <30I-U, the first intermediate roller adjustment method is used; if the current DS strip shape deviation value is negative and the current WS strip shape deviation value is positive, then when ∑level is ≤-30I-U, the hydraulic cylinder leveling method is used, and when ∑level is >-30I-U, the first intermediate roller adjustment method is used; if the current D If the S-shaped deviation is positive, the current WS-shaped deviation is positive, and the values of the four edge channels are greater than 10I-U, then the roll crown adjustment method applies. If the current DS-shaped deviation is positive, the current WS-shaped deviation is positive, the values of the four edge channels are less than 10I-U but greater than 3I-U, and there are deviation values in other channels, then the roll crown adjustment method applies. If the current DS-shaped deviation is negative, the current WS-shaped deviation is negative, and the values of the four edge channels are less than -10I-U, then the roll crown adjustment method applies. If the current DS-shaped deviation is negative, the current WS-shaped deviation is negative, the values of the four edge channels are less than -10I-U but less than -3I-U, and there are deviation values in other channels, then the roll crown adjustment method applies.
[0025] In one embodiment of this application, based on the aforementioned scheme, several standard strips are selected from different preset width ranges.
[0026] According to one aspect of the embodiments of this application, a strip shape control device for strip rolling is provided. The device includes: a first acquisition unit, configured to acquire standard strip shape deviations and standard speed indicators at different positions of a standard strip at intervals, acquire the corresponding standard strip adjustment methods, and save them as the Gth data entry; a second acquisition unit, configured to acquire the current strip shape deviation and current speed indicator; a calculation unit, configured to acquire the Gth data entry using the current strip shape deviation and current speed indicator, and calculate the similarity between the current strip shape deviation and the standard strip shape deviation; a first execution unit, configured to adjust the current strip using the standard strip adjustment method of the Gth data entry if the similarity is less than a set value; and a second execution unit, configured to select the current strip adjustment method based on the current strip shape leveling deviation value and the current values of the four outer channels of the edge, according to the set strip adjustment method, if the similarity is greater than the set value.
[0027] According to one aspect of the embodiments of this application, a computer-readable storage medium is provided, wherein at least one piece of program code is stored therein, the at least one piece of program code being loaded and executed by a processor to perform the operations as described in the above embodiments.
[0028] According to one aspect of the embodiments of this application, a reversible rolling mill is provided, the reversible rolling mill including one or more processors and one or more memories, the one or more memories storing at least one piece of program code, the at least one piece of program code being loaded and executed by the one or more processors to perform the operations as described in the above embodiments.
[0029] In the technical solution of this application embodiment, qualified rolled strip steel is used as standard strip steel. Rolling process data at different positions of the standard strip steel are acquired and saved as the Gth data. Based on the current strip shape deviation and current speed indicator of the strip steel being rolled, the matching Gth data is obtained. The similarity between the current strip shape deviation and the standard strip shape deviation is calculated. If the similarity is less than a set value, the standard strip steel adjustment method of the Gth data is directly used to adjust the current strip steel, which can effectively improve the adjustment efficiency of the strip steel. If the similarity is greater than the set value, the standard strip steel adjustment method cannot be applied directly. In this case, based on the current strip shape leveling deviation value and the current value of the four channels on the outer edge, the current strip steel adjustment method is selected according to the set strip steel adjustment method, thereby achieving faster and more timely strip shape control, meeting actual control requirements, improving the strip shape consistency of each strip steel, improving the strip shape qualification rate, and improving the strip shape control accuracy.
[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0032] Figure 1 This is a flowchart illustrating a strip shape control method for strip rolling according to an embodiment of this application;
[0033] Figure 2 This is a block diagram of a strip shape control device for strip rolling according to an embodiment of this application;
[0034] Figure 3 This is a schematic diagram of a computer-readable storage medium according to an embodiment of this application;
[0035] Figure 4 This is a schematic diagram illustrating strip shape control during strip rolling according to an embodiment of this application. Detailed Implementation
[0036] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.
[0037] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0038] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.
[0039] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.
[0040] It should be noted that "multiple" in this article refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.
[0042] The implementation details of the technical solutions in the embodiments of this application are described in detail below:
[0043] First, it should be noted that the strip shape control method proposed in this application can be applied to the field of strip rolling technology. For example, for a 20-roll single-stand reversible rolling mill, the speed changes rapidly during the rolling process, and the requirements for the adjustment response speed of the strip shape also become higher. Therefore, the rapid response of the strip shape control method is particularly important.
[0044] According to one aspect of this application, a method for controlling the shape of rolled strip steel is provided. Figure 1 The flowchart illustrates a strip rolling shape control method according to an embodiment of this application. This strip rolling shape control method can be executed by a device with computational processing capabilities. The strip rolling shape control method includes at least steps 110 to 150, which are described in detail below:
[0045] Please refer to Figure 1 In step 110, the standard strip shape deviation and standard speed mark at different positions of the standard strip are obtained at intervals, and the corresponding standard strip adjustment method is obtained and saved as the Gth data item.
[0046] In this application, the standard strip is a rolled strip that has passed the rolling process. Standard strip shape deviations and standard speed indicators are obtained at certain length intervals along the length direction. The adjustment method of the standard strip at each position is then obtained, and this data is saved as the Gth data entry. In other words, the adjustment method of the standard strip under different standard strip shape deviations and standard speed indicators during the rolling process can be obtained using the standard strip.
[0047] In step 120, the current strip shape deviation and current speed indicator are obtained;
[0048] In this application, the current strip shape value can be directly obtained through a strip shape measuring instrument, and the current strip shape deviation can be obtained by comparing it with the target strip shape value. The records of the standard speed mark and the current speed mark include the speed and acceleration of the strip forward.
[0049] In step 130, the Gth data point is obtained using the current strip shape deviation and current speed identifier, and the similarity between the current strip shape deviation and the standard strip shape deviation is calculated.
[0050] In this application, the standard strip shape deviation and standard speed identifier that are the same as or similar to those of the standard strip can be obtained from the current strip shape deviation and the current speed identifier of the strip, so that the corresponding G data can be obtained, and then the similarity between the current strip shape deviation and the standard strip shape deviation can be calculated.
[0051] In step 140, if the similarity is less than the set value, the standard strip adjustment method of the Gth data is used to adjust the current strip.
[0052] In this application, the current strip can be adjusted using the standard strip adjustment method of the G data only when the similarity between the current strip shape deviation and the standard strip shape deviation is within the set value range, that is, when the rolling condition of the standard strip shape group G is close to the rolling condition of the current strip. This can greatly accelerate the response efficiency of the strip shape adjustment control.
[0053] In step 150, if the similarity is greater than the set value, the current strip adjustment method is selected based on the current plate shape leveling deviation value and the current value of the four channels on the outer side of the edge, according to the set strip adjustment method.
[0054] In this application, if the similarity is greater than a set value, it means that the current strip shape deviation and current speed indicator of the strip are close to those of the standard strip in Group G, but the similarity is too high, and the adjustment method of the standard strip in Group G cannot be directly applied. At this time, based on the current strip shape leveling deviation value and the current value of the four channels on the outer edge, the current strip adjustment method is selected according to the set strip adjustment method.
[0055] In one embodiment of this application, step 120, obtaining the current strip shape deviation value and current speed indicator, includes:
[0056] Step 121: Obtain the current acceleration of the strip and distinguish between constant speed, acceleration, and deceleration.
[0057] Step 122: Obtain the current rolling pass and current rolling speed of the strip.
[0058] Step 123: Obtain the preset target flatness of the strip based on the current acceleration, current rolling pass, and current rolling speed of the strip.
[0059] Step 124: Read the current flatness of the strip and calculate the difference between the current flatness and the target flatness to obtain the current flatness deviation value.
[0060] In this application, the current strip rolling acceleration and speed are obtained, and the preset target flatness can be obtained according to the current rolling pass of the strip. The difference between the current flatness and the target flatness is calculated to obtain the current flatness deviation value.
[0061] In one embodiment of this application, the similarity between the current plate shape deviation and the standard plate shape deviation is calculated using the following formula:
[0062] ∑|DS k -DS n |+……+|DS 1‘ -DS1|+|WS k -WS n |+……+|WS 1‘ -WS1|=Δ G
[0063] Where k is the maximum effective strip shape channel of standard strip steel, DS k WS represents the shape deviation value of the k-th strip shape measuring ring on the DS side covered by the standard strip width. k The strip shape deviation value of the k-th strip shape measuring ring on the WS side covered by the standard strip width, where n is the current maximum effective strip shape channel, and DS n WS represents the strip shape deviation at the nth measuring ring on the DS side. n This represents the strip shape deviation of the current strip at the nth measuring ring on the WS side.
[0064] In this application, based on the width of the standard strip, the effective number of magnetic rings on each side of the shape measuring roller occupied by the standard strip can be calculated to be k, and the total number of magnetic rings occupied by the standard strip is 2k. The strip shape deviation value of each magnetic ring of the shape measuring roller is DS. k and WS kThe current effective number of magnetic rings on each side of the strip measuring roller is n, and the total number of magnetic rings occupied by the standard strip is 2n. The strip shape deviation value of each magnetic ring on the shape measuring roller is DS. n and WS n .
[0065] It should be emphasized that the width range of standard strip steel is divided into 50m increments. Since the width of each outer measuring ring is 26mm, |nk|≤1. When n≤k, the number of measuring rings is n, and when n>k, the number of measuring rings is k. For ease of calculation and algorithm demonstration, we assume n≤k here, then the number of measuring rings is n, where n=k or n=k-1.
[0066] The similarity Δ can be calculated using the formula. G .
[0067] In one embodiment of this application, if the similarity is less than a set value in step 140, after adjusting the current strip using the standard strip adjustment method of the Gth data, the method further includes:
[0068] Step 141: Calculate the current plate shape deviation using the following formula.
[0069]
[0070] Step 142: Calculate the standard plate shape deviation using the following formula.
[0071]
[0072] Step 143, obtain the current plate shape deviation value εN for the next 3 scanning cycles:
[0073]
[0074] Step 144: Obtain the standard plate shape deviation value εN for the subsequent 3 scanning cycles:
[0075]
[0076] Step 145, if If εN < εG, then the current strip shape deviation, current speed indicator, and current strip adjustment method will be updated and saved as the Gth data entry.
[0077] In this application, if the similarity ΔG is less than a set value, which can be 10, then the two are considered to have a high similarity and the current plate shape can be controlled by the standard plate shape adjustment method.
[0078] The adjustment effect of the standard plate shape deviation value can then be verified based on the deviation values of the subsequent three scanning cycles. And εN<ε G If the current strip shape deviation value is smaller after adjustment using the standard strip shape adjustment method and is smaller than the subsequent strip shape deviation value of the standard strip, then the current strip shape deviation, current speed indicator, and current strip adjustment method are updated and saved as the Gth data entry. This improves the accuracy of subsequent adjustments.
[0079] In one embodiment of this application, the current plate shape leveling deviation value is calculated using the following formula:
[0080]
[0081] Where ∑level is the current plate shape leveling deviation value, WS n DS represents the actual flatness value of the nth measuring ring on the operating side covered by the strip. n Let I' be the actual flatness value of the nth measuring ring on the transmission side covered by the strip, and In be the target flatness value of the corresponding measuring ring. n To set a flatness value for the secondary optimization of the target plate flatness value of the nth measurement ring based on steel type, speed, pass number, and speed status.
[0082] In this application, the flatness deviation values of the strip on the DS side and WS side are calculated. The value is taken from the n / 2th to the nth measurement ring. When n / 2 is not an integer, it is moved inward to the junction of the measurement rings.
[0083] It should be emphasized that the shape measuring rolls are symmetrical about the rolling center line. The measuring rings of the shape measuring rolls are numbered from the inside out with the rolling center line as the center. The measuring rings of the shape measuring rolls on the drive side are numbered DS1, DS2, ..., DS19, while the measuring rings of the shape measuring rolls on the operation side are numbered WS1, WS2, ..., WS19 from the rolling center line outwards.
[0084] The strip width data is obtained as W, where 750 mm < W ≤ 1300 mm. After threading the strip in Step 1, the strip and the measuring rings of the shape meter are symmetric about the rolling center of the rolling mill during rolling. The control system (the first-level control system with a PLC controller) can calculate the number of effective measuring rings occupied by the strip in combination with the strip width W. There are 14 measuring rings in the middle part of the shape roll with a length of 52 mm and a total length of 728 mm, so the 52-mm measuring rings will all be covered by the strip. In addition, there are 24 measuring rings with a length of 26 mm. Therefore, the total number of measuring rings occupied is 14 + (W - 728) / 26. From the rolling center line to both sides, the number of measuring rings used on the DS side and the WS side is 7 + (W - 728) / 52 respectively. The maximum number of measuring rings that can be covered is WSn and DSn. For example, when this value is 13.53, it means that the measuring rings DS1,..., DS14 and WS1,..., WS14 are available for the strip, and the coverage rates of the measuring rings DS14 and WS14 are 53%.
[0085] Determine the maximum number of shape measuring rings n covered by W. When the strip coverage rate R of the WSn and DSn measuring rings ≤ 50%, since the coverage rate of this measuring ring is too small, the measured value detected cannot represent the shape of the outermost edge. The flatness value of the outermost edge is ignored at this time, and the number of effective measuring rings is determined to be n - 1. When the strip coverage rate of the WSn and DSn measuring rings 50 < R ≤ 80%, the shape detected by this edge measuring ring is only used for display on the screen for reference and does not participate in the actual automatic shape control setting. The number of effective measuring rings is determined to be n - 1. When the strip coverage rate R of the WSn and DSn measuring rings > 80%, it is regarded as an effective shape, and the number of effective measuring rings is determined to be n for automatic shape control.
[0086] Among them, the secondary optimized setting flatness value I' n takes the value according to Table 1:
[0087] Table 1 The secondary optimized setting flatness value I' of the target shape flatness value of the nth measuring ring n
[0088]
[0089]
[0090]
[0091] In an embodiment of the present application, in Step 150, if the similarity is greater than the set value, then according to the current shape leveling deviation value and the current values of the four channels on the outer side of the edge, the current strip adjustment method is selected according to the set strip adjustment method, including:
[0092] Step 151: If the current DS plate shape deviation value is positive and the current WS plate shape deviation value is negative, then when ∑level is ≥30I-U, the hydraulic cylinder leveling method is used, and when ∑level is <30I-U, the first intermediate roller adjustment method is used.
[0093] Step 152: If the current DS plate shape deviation value is negative and the current WS plate shape deviation value is positive, then when ∑level is ≦-30I-U, the hydraulic cylinder leveling method is used, and when ∑level is >-30I-U, the first intermediate roller adjustment method is used.
[0094] Step 153: If the current DS plate shape deviation value is positive, the current WS plate shape deviation value is positive, and the values of the four edge channels are greater than 10I-U, then the roller crown adjustment mode is activated.
[0095] Step 154: If the current DS plate shape deviation value is positive, the current WS plate shape deviation value is positive, the values of the four edge channels are less than 10I-U and greater than 3I-U, and there are deviation values in other channels, then the roll crown adjustment method is used.
[0096] Step 155: If the current DS plate shape deviation value is negative, the current WS plate shape deviation value is negative, and the values of the four edge channels are less than -10I-U, adjust the roller crowning method.
[0097] Step 156: If the current DS plate shape deviation value is negative, the current WS plate shape deviation value is negative, the values of the four edge channels are less than -10I-U and less than -3I-U, and other channels have deviation values, then the roll crown adjustment method is used.
[0098] In this application, when the similarity is greater than the set value, the current strip adjustment method is selected based on the current DS strip shape deviation value, the current WS strip shape deviation value, the current strip shape leveling deviation value, and the current values of the four channels on the outer side of the edge, according to the set strip adjustment method.
[0099] The operating rules for hydraulic cylinder leveling are shown in Table 2.
[0100] Table 2. Action Rules for Hydraulic Cylinder Leveling Methods
[0101]
[0102]
[0103] When the sequence number is 1 and ∑level is ≥30I-U, the hydraulic cylinder on the transmission side presses up and the hydraulic cylinder on the operation side descends. The action rate is 0.1 mm / s when the speed is constant, 0.2 mm / s when accelerating, and 0.05 mm / s when decelerating.
[0104] When the sequence number is 2 and ∑level is ≦-30I-U, the hydraulic cylinder on the operating side presses up and the hydraulic cylinder on the transmission side descends. The action rate is 0.1 mm / s when the speed is constant, 0.2 mm / s when accelerating, and 0.05 mm / s when decelerating.
[0105] The first intermediate roll of the 20-roll single-stand reversible rolling mill is tapered, with the upper first intermediate roll tapered on the operating side and the lower first intermediate roll tapered on the drive side. The main principle is to change the local force on the work rolls by taper, thereby differentiating the force on the edge areas of the strip and thus achieving strip shape adjustment. The adjustment method of the first intermediate roll is as follows:
[0106] Since the stroke of the first intermediate roller is 170mm, the current position of the work roller is calculated using the first intermediate roller according to the following formula:
[0107] W / 2-7500-T1-S act +850 = S edge
[0108] In the calculation formula, the unit is 0.1 mm, W is the strip width, T1 is the frustum length of the first intermediate roll, and S... act S represents the lateral displacement value of the current intermediate roller. edge This is the distance between the intermediate truncated cone and the edge of the strip.
[0109] In actual control, since the maximum stroke of the first intermediate roller is 170mm, the value of the upper first intermediate roller changes from 0 to 170 when it moves from DS to WS, and the value of the lower first intermediate roller changes from 170 to 0 when it moves from DS to WS. The difference between the upper and lower intermediate rollers is set to not exceed 20mm. edge When S is negative, it is used to adjust the edge wave pattern of the strip. edge When it is a positive value, it is used to adjust the edge pressing of the strip.
[0110] When the effective measurement ring number of the strip shape measuring roller for the current strip is determined to be n, the roll shifting rule of the first intermediate roller is set, (WSn-I') n The judgment criterion for )+(WSn-1-In-1)*(WSn-2-In-2)+(WSn-3-In-3) is that the value on one side, which is 4 channels away from the edge of the strip, is greater than 10I-U. At this time, it is set to decrease S. act The value is 1*αmm per cycle during constant speed, 3*αmm per cycle during acceleration, and 1*αmm per cycle during deceleration. When it is less than -10I-U, it is set to increase S. act The value of is -1*αmm per cycle at constant speed, -3*αmm per cycle during acceleration, and -1*αmm per cycle during deceleration. S actThe movement is within a range of no more than 160 mm and no less than 30 mm.
[0111] Where α=[(WSn-I' n The integer selected by 10 is not less than 1.
[0112] Similarly: when the effective measurement number of strip shape rings for the current strip is determined to be n, the rule for the first intermediate roll shifting is set, (DSn-I') n The criterion for determining the value of DSn-1-In-1, (DSn-2-In-2), and (DSn-3-In-3) is that the value on one side, which is 4 channels away from the edge of the strip, is greater than 10I-U. In this case, the value is set to decrease S. act The value is 1*αmm per cycle during constant speed, 3*αmm per cycle during acceleration, and 1*αmm per cycle during deceleration. When it is less than -10I-U, it is set to increase S. act The value of is -1*αmm per cycle at constant speed, -3*αmm per cycle during acceleration, and -1*αmm per cycle during deceleration. S act The movement is within a range of no more than 160 mm and no less than 30 mm.
[0113] Where, α'=[(WSn-I' n The integer selected by 10 is not less than 1.
[0114] |S act(上一中间) -S act(下一中间) |≤20, meaning the deviation of the lateral position of the upper and lower intermediate rollers is the condition for roller slippage.
[0115] The main principle of the roll crown adjustment method is to adjust the strip shape at the corresponding position by pressing down the rack. It is generally used to adjust the inner strip shape. There are 7 racks that can be individually pressed down and controlled in the width direction of the strip. The thickness of the roll system is changed by the rack. Each rack corresponds to an adjustable strip shape within a width range of 208mm.
[0116] The roller crown adjustment numbers from the drive side to the operating side are as follows: Roller crown adjustment #1, Roller crown adjustment #2, Roller crown adjustment #3, Roller crown adjustment #4, Roller crown adjustment #5, Roller crown adjustment #6, Roller crown adjustment #7.
[0117] The corresponding adjustment positions are shown in Table 3:
[0118] Table 3. Adjustment Positions Corresponding to Roller Crown Adjustment
[0119] Serial Number Roller crown adjustment device Corresponding effective plate shape roller measuring ring 1 #1 Roller Crown Adjustment <![CDATA[DS 19 、DS 18 、DS 17 、DS 16 、DS 15 、DS 14 ]]> 2 #2 Roller Crown Adjustment <![CDATA[DS 13 、DS 12 、DS 11 、DS 10 、DS9、DS8、DS7]]> 3 Adjustment of crown of roller #3 <![CDATA[DS6、DS5、DS4、DS3]]> 4 Adjustment of No. 4 roller crown <![CDATA[DS2、DS1、WS1、WS2]]> 5 5# Roller Crown Adjustment <![CDATA[WS3、WS4、WS5、WS6]]> 6 Adjustment of the crown of roller #6 <![CDATA[WS7、WS8、WS9、WS 10 、WS 11 、WS 12 、WS 13 ]]> 7 7# Roller Crown Adjustment <![CDATA[WS 14 、WS 15 、WS 16 、WS7、WS 18 、WS 19 ]]>
[0120] When the effective number of strip shape measurement rings for the current strip is determined to be n, and the corresponding target strip shape straightness is In, the calculation method for each roll crown adjustment device is determined according to the corresponding effective strip shape roll measurement ring. The strip secondary optimization setting straightness value for the outermost measurement ring should be set to I' based on the read pass number, speed, and speed status. n .
[0121] Taking number 3 as an example, the deviation value δ = (DS3-I'3) + (DS4-I'4) + (DS5-I'5) + (DS6-I'6).
[0122] When δ≥3I-U, increase the position of the No. 3 roller crown adjustment device and operate at the system set rate. When δ≤-3I-U, decrease the position of the No. 3 roller crown adjustment device and set the operation rule that the distance between adjacent racks shall not exceed 25mm.
[0123] In one embodiment of this application, several standard strips are selected from different preset width ranges.
[0124] In this application, a standard strip is set every 50mm in width range of 1000-1300mm, that is, one standard strip is set in each of the ranges of 1000-1049.9mm, 1050-1099.9mm, 1100-1149.9mm, 1150-1199.9mm, 1200-1249.9mm, and 1250-1300mm. The current strip can find a corresponding standard strip in the width range of 1000-1300mm.
[0125] In summary, by using qualified rolled strip as the standard strip, rolling process data at different positions of the standard strip is acquired and saved as the Gth data point. Based on the current shape deviation and current speed indicator of the strip being rolled, the matching Gth data point is obtained. The similarity between the current shape deviation and the standard shape deviation is calculated. If the similarity is less than a set value, the standard strip adjustment method from the Gth data point is directly used to adjust the current strip, effectively improving the adjustment efficiency. If the similarity is greater than the set value, the standard strip adjustment method cannot be applied directly. Instead, based on the current shape leveling deviation value and the current values of the four outer channels, the current strip adjustment method is selected according to the set adjustment method. This achieves faster and more timely shape control, meeting actual control requirements, improving the shape consistency of each strip, increasing the shape qualification rate, and improving shape control accuracy.
[0126] The following describes an embodiment of the apparatus described in this application, which can be used to execute the strip shape control method for strip rolling described in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the strip shape control method for strip rolling described in the above applications.
[0127] Figure 2 A block diagram of a strip rolling shape control device according to an embodiment of this application is shown.
[0128] Reference Figure 2 As shown, a strip rolling shape control device 400 according to an embodiment of this application includes: a first acquisition unit 401, a second acquisition unit 402, a calculation unit 403, a first execution unit 404, and a second execution unit 405.
[0129] The system comprises the following components: a first acquisition unit 401, used to acquire standard strip shape deviations and standard speed indicators at different positions of the standard strip at intervals, acquire the corresponding standard strip adjustment methods, and save them as the Gth data entry; a second acquisition unit 402, used to acquire the current strip shape deviation and current speed indicator; a calculation unit 403, used to acquire the Gth data entry using the current strip shape deviation and current speed indicator, and calculate the similarity between the current strip shape deviation and the standard strip shape deviation; a first execution unit 404, used to adjust the current strip using the standard strip adjustment method of the Gth data entry if the similarity is less than a set value; and a second execution unit 405, used to select the current strip adjustment method based on the current strip shape leveling deviation value and the current value of the four outer channels of the edge if the similarity is greater than a set value, according to the set strip adjustment method.
[0130] In another aspect, this application also provides a computer-readable storage medium storing a program product capable of implementing the strip rolling shape control method described above in this specification. In some possible embodiments, various aspects of this application may also be implemented as a program product comprising program code that, when run on a terminal device, causes the terminal device to perform the steps described in the "Exemplary Methods" section of this specification according to the various exemplary embodiments of this application.
[0131] refer to Figure 3 As shown, a program product 500 for implementing the above-described method according to an embodiment of this application is described. It may employ a portable compact disc read-only memory (CD-ROM) and include program code, and can run on a terminal device, such as a personal computer. However, the program product of this application is not limited thereto. In this application, the readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.
[0132] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.
[0133] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting programs for use by or in conjunction with an instruction execution system, apparatus, or device.
[0134] The program code contained on the readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.
[0135] Program code for performing the operations of this application can be written in any combination of one or more programming languages, including object-oriented programming languages such as Java and C++, and conventional procedural programming languages such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).
[0136] In another respect, this application also provides a reversible rolling mill capable of implementing the above-described method.
[0137] The reversible mill includes one or more processors and one or more memories, the one or more memories storing at least one piece of program code, which is loaded and executed by the one or more processors to perform the operations as described in the above embodiments.
[0138] like Figure 4 As shown, the reversible rolling mill 600 is represented in the form of a general-purpose computing device. The components of the reversible rolling mill 600 may include, but are not limited to: at least one processing unit 610, at least one storage unit 620, and a bus 630 connecting different system components (including storage unit 620 and processing unit 610).
[0139] The storage unit stores program code that can be executed by the processing unit 610, causing the processing unit 610 to perform the steps described in the "Embodiment Methods" section above according to various exemplary embodiments of this application.
[0140] Storage unit 620 may include readable media in the form of volatile storage units, such as random access memory (RAM) 621 and / or cache memory 622, and may further include read-only memory (ROM) 623.
[0141] Storage unit 620 may also include a program / utility 624 having a set (at least one) of program modules 625, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.
[0142] Bus 630 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.
[0143] The reversible mill 600 can also communicate with one or more external devices 1200 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable users to interact with the reversible mill 600, and / or any device that enables the reversible mill 600 to communicate with one or more other computing devices (e.g., routers, modems, etc.). This communication can be performed via input / output (I / O) interface 650. Furthermore, the reversible mill 600 can also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via network adapter 660. As shown, network adapter 660 communicates with other modules of the reversible mill 600 via bus 630. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with the reversible mill 600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.
[0144] Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, terminal device, or network device, etc.) to execute the method according to the embodiments of this application.
[0145] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of this application, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.
[0146] It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A method for controlling the shape of rolled strip steel, characterized in that, The method includes: The standard strip shape deviation and standard speed mark at different positions of the standard strip are obtained at intervals, and the corresponding standard strip adjustment method is obtained and saved as the Gth data item. Obtain the current strip shape deviation and current speed indicator; Obtain the Gth data point using the current strip shape deviation and current speed identifier, and calculate the similarity between the current strip shape deviation and the standard strip shape deviation; If the similarity is less than the set value, the standard strip steel adjustment method of the Gth data will be used to adjust the current strip steel. If the similarity is greater than the set value, the current strip adjustment method will be selected based on the current plate leveling deviation value and the current value of the four channels on the outer side of the edge, according to the set strip adjustment method. The current plate leveling deviation value is calculated using the following formula: in, This is the current plate leveling deviation value. This represents the actual flatness value of the nth measuring ring on the operating side covered by the strip. Let In be the actual flatness value of the nth measuring ring on the transmission side covered by the strip, and In be the target flatness value of the corresponding measuring ring. To set a flatness value for the secondary optimization of the target plate flatness value of the nth measurement ring based on steel type, speed, pass number, and speed status.
2. The method according to claim 1, characterized in that, The process of obtaining the current strip shape deviation value and current speed indicator includes: Obtain the current acceleration of the strip and distinguish between constant speed, acceleration, and deceleration; Obtain the current rolling pass and current rolling speed of the strip; The preset target flatness is obtained based on the current acceleration, current rolling pass, and current rolling speed of the strip. Read the current flatness of the strip and calculate the difference between the current flatness and the target flatness to obtain the current flatness deviation value.
3. The method according to claim 1, characterized in that, The similarity between the current plate shape deviation and the standard plate shape deviation is calculated using the following formula: in, This provides the largest effective strip shape channel for standard strip steel. Covered by the standard strip width The side of the first The strip shape meter measures the strip shape deviation of the ring. Covered by the standard strip width The side of the first The strip shape meter measures the strip shape deviation of the ring. It is currently the largest effective strip shape channel. For the current strip steel in Side The plate shape deviation of each measuring ring, For the current strip steel in Side The plate shape deviation of each measuring ring.
4. The method according to claim 1, characterized in that, If the similarity is less than the set value, the current strip is adjusted using the standard strip adjustment method of the Gth data point, and the adjustment also includes: The current plate shape deviation is calculated using the following formula. : The standard plate shape deviation is calculated using the following formula. : Obtain the current plate shape deviation value for the next 3 scan cycles. : Obtain the standard plate shape deviation value for the next 3 scanning cycles. : like and Then the current strip shape deviation, current speed indicator, and current strip adjustment method will be updated and saved as the Gth data entry.
5. The method according to claim 1, characterized in that, If the similarity is greater than the set value, then based on the current strip leveling deviation value and the current values of the four channels on the outer side of the edge, the current strip adjustment method is selected according to the set strip adjustment method, including: If the current DS plate shape deviation value is positive and the current WS plate shape deviation value is negative, then When the value is ≥30I-U, a hydraulic cylinder leveling method is used. When the value is <30I-U, the first intermediate roller adjustment method is used; If the current DS plate shape deviation value is negative and the current WS plate shape deviation value is positive, then When the value is ≤-30I-U, a hydraulic cylinder leveling method is used. When the value is >-30I-U, the first intermediate roller adjustment method is used; If the current DS plate shape deviation value is positive, the current WS plate shape deviation value is positive, and the values of the four edge channels are greater than 10I-U, then the roll crown adjustment method is used. If the current DS plate shape deviation value is positive, the current WS plate shape deviation value is positive, the values of the four edge channels are less than 10I-U and greater than 3I-U, and there are deviation values in other channels, then the roll crown adjustment method is used. If the current DS plate shape deviation value is negative, the current WS plate shape deviation value is negative, and the values of the four edge channels are less than -10I-U, the roll crown adjustment method is as follows: If the current DS plate shape deviation value is negative, the current WS plate shape deviation value is negative, the values of the four edge channels are less than -10I-U and less than -3I-U, and other channels have deviation values, then the roll crown adjustment method is used.
6. The method according to claim 1, characterized in that, Several standard strips are selected from different preset width ranges.
7. A strip shape control device for rolled steel, characterized in that, The device includes: The first acquisition unit is used to acquire the standard strip shape deviation and standard speed mark at different positions of the standard strip at intervals, acquire the corresponding standard strip adjustment method and save it as the Gth data item. The second acquisition unit is used to acquire the current strip shape deviation and current speed indicator of the strip. The calculation unit is used to obtain the Gth data point with the current strip shape deviation and the current speed identifier, and to calculate the similarity between the current strip shape deviation and the standard strip shape deviation. The first execution unit is used to adjust the current strip using the standard strip adjustment method of the Gth data if the similarity is less than the set value. The second execution unit is used to select the current strip adjustment method based on the current strip leveling deviation value and the current value of the four channels on the outer side of the edge if the similarity is greater than the set value. The device is also used for: The current plate leveling deviation value is calculated using the following formula: in, This is the current plate leveling deviation value. This represents the actual flatness value of the nth measuring ring on the operating side covered by the strip. Let In be the actual flatness value of the nth measuring ring on the transmission side covered by the strip, and In be the target flatness value of the corresponding measuring ring. To set a flatness value for the secondary optimization of the target plate flatness value of the nth measurement ring based on steel type, speed, pass number, and speed status.
8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one piece of program code, which is loaded and executed by a processor to perform the operations performed by the method as described in any one of claims 1 to 6.
9. A reversible rolling mill, characterized in that, The reversible mill includes one or more processors and one or more memories, the one or more memories storing at least one piece of program code, which is loaded and executed by the one or more processors to perform the operations performed by the method as described in any one of claims 1 to 6.