Pickling line strip steel rolling control method and device, medium and electronic equipment
By intelligently and collaboratively controlling the rolling force and unit speed, the problem of low strip rolling efficiency in pickling lines has been solved, surface quality has been improved, zinc flow defects have been reduced, and yield and production efficiency have been increased.
Patent Information
- Application Number
- CN202511325436.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-01-27
AI Technical Summary
The pickling line has low strip rolling efficiency, resulting in a high amount of scrap, defective and downgraded products during the hot-dip galvanizing process, and a low product yield. This is mainly because problems such as surface roughness and fine pits have not been effectively resolved.
By acquiring strip steel information and production line information, the target rolling force and unit speed are determined, and the rolling force adjustment and positioning speed reduction operation are coordinated and controlled to achieve intelligent coordination between rolling force and unit speed, ensuring the surface modification effect and safe weld passage under high rolling force.
It improves the strip rolling efficiency of the pickling line, enhances the surface uniformity of the strip, reduces zinc flow defects, and increases yield and production efficiency.
Smart Images
Figure CN121402437A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of strip rolling technology, and particularly relates to a control method, device, medium and electronic equipment for strip rolling in a pickling line. Background Technology
[0002] In recent years, pickling lines have become increasingly popular due to their advantages such as low cost and low energy consumption. Pickled products have a bright surface and can be directly galvanized without the need for cold rolling, thus reducing processing costs.
[0003] In actual production, although a leveling process is performed, the amount of scrap, substandard, and downgraded products generated when using pickled steel as a substrate for hot-dip galvanizing is significantly higher compared to when using cold-rolled strip steel for hot-dip galvanizing, resulting in a lower product yield. In-depth analysis revealed that the key issues leading to hot-dip galvanizing quality problems lie in the surface roughness of the pickled products and subtle differences such as small pits on the surface after the oxide layer is removed.
[0004] Therefore, the low strip rolling efficiency of pickling lines is a technical problem that urgently needs to be solved. Summary of the Invention
[0005] The embodiments of this application provide a control method, apparatus, medium, and electronic equipment for strip rolling in a pickling line, which can at least improve the strip rolling efficiency of the pickling line to a certain extent.
[0006] 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.
[0007] According to a first aspect of the embodiments of this application, a method for controlling the rolling of strip steel in a pickling line is provided, the method comprising: Obtain information about the strip steel to be rolled and the production line information of the pickling line; The target rolling force of the strip is determined based on the strip information, and the target unit speed of the pickling line is determined based on the production line information. The rolling force adjustment time for the rolling force adjustment operation is determined based on the current rolling force and the target rolling force, and the deceleration adjustment time for the positioning deceleration operation is determined based on the current unit speed and the target unit speed. Based on the rolling force adjustment time and the deceleration adjustment time, the pickling line is controlled to simultaneously complete the rolling force adjustment operation and the positioning deceleration operation.
[0008] In some embodiments of this application, based on the foregoing scheme, controlling the pickling line to simultaneously complete the rolling force adjustment operation and the positioning speed reduction operation based on the rolling force adjustment time and the speed reduction adjustment time includes: determining a first execution timing of the rolling force adjustment operation and a second execution timing of the positioning speed reduction operation based on the rolling force adjustment time and the speed reduction adjustment time; controlling the pickling line to perform the rolling force adjustment operation based on the first execution timing, and controlling the pickling line to perform the positioning speed reduction operation based on the second execution timing.
[0009] In some embodiments of this application, based on the foregoing scheme, determining the first execution timing of the rolling force adjustment operation and the second execution timing of the positioning and deceleration operation based on the rolling force adjustment time and the deceleration adjustment time includes: if the rolling force adjustment time is greater than the deceleration adjustment time, determining the current moment as the first execution timing, and determining the first expected moment after a first time interval from the current moment as the second execution timing, wherein the first time interval is the difference between the rolling force adjustment time and the deceleration adjustment time; if the rolling force adjustment time is less than the deceleration adjustment time, determining the current moment as the second execution timing, and determining the second expected moment after a second time interval from the current moment as the first execution timing, wherein the second time interval is the difference between the rolling force adjustment time and the deceleration adjustment time; if the rolling force adjustment time is equal to the deceleration adjustment time, determining that both the first execution timing and the second execution timing are the current moment.
[0010] In some embodiments of this application, based on the foregoing scheme, the pickling line includes a leveling mill support roll. Determining the first execution timing of the rolling force adjustment operation and the second execution timing of the positioning and deceleration operation based on the rolling force adjustment time and the deceleration adjustment time includes: obtaining the current distance between the weld seam of the strip and the leveling mill support roll as a first distance; if the rolling force adjustment time is greater than the deceleration adjustment time, determining the first execution timing as the distance between the weld seam and the leveling mill support roll equal to the first distance, and determining the second execution timing based on the rolling force adjustment time, the deceleration adjustment time, the current unit speed, and the target unit speed, wherein... The second execution timing occurs after the first execution timing. If the rolling force adjustment time is less than the deceleration adjustment time, the second execution timing is determined to be when the distance between the weld and the leveling machine support roll is equal to the first distance. The first execution timing is determined based on the rolling force adjustment time, the deceleration adjustment time, the current unit speed, the target unit speed, and the positioning ramp rate of the pickling line, wherein the first execution timing occurs after the second execution timing. If the rolling force adjustment time is equal to the deceleration adjustment time, both the first and second execution timings are determined to be when the distance between the weld and the leveling machine support roll is equal to the first distance.
[0011] In some embodiments of this application, based on the foregoing scheme, the pickling line includes a leveling mill support roll, a work roll, and a hydraulic cylinder. The work roll is deployed between the leveling mill support roll and the strip. The hydraulic cylinder is used to apply rolling force to the strip through the work roll. The step of controlling the pickling line to perform the rolling force adjustment operation and the positioning and speed reduction operation based on the first execution timing and the second execution timing includes: when the first execution timing arrives, controlling the hydraulic cylinder to perform the rolling force adjustment operation through the work roll; and when the second execution timing arrives, controlling the pickling line to perform the positioning and speed reduction operation.
[0012] In some embodiments of this application, based on the foregoing scheme, determining the rolling force adjustment time for the rolling force adjustment operation based on the current rolling force and the target rolling force includes: acquiring the current rolling force and the positioning ramp rate; calculating the rolling force difference between the current rolling force and the target rolling force; and determining the ratio of the rolling force difference to the positioning ramp rate as the rolling force adjustment time. Determining the deceleration adjustment time for the positioning deceleration operation based on the current unit speed and the target unit speed includes: acquiring the current unit speed and the deceleration ramp rate; calculating the speed difference between the current unit speed and the target unit speed; and determining the ratio of the speed difference to the deceleration ramp rate as the deceleration adjustment time.
[0013] In some embodiments of this application, based on the foregoing scheme, the pickling line further includes a work roll, the pickling line includes a leveling machine support roll, a work roll hydraulic cylinder, and a bending roll cylinder, the work roll is deployed between the leveling machine support roll and the strip, the hydraulic cylinder is used to apply rolling force to the strip through the work roll, the work roll generates bending roll force under the action of the bending roll cylinder, and in the process of controlling the hydraulic cylinder to perform the rolling force adjustment operation through the work roll, the method further includes: controlling the bending roll cylinder to perform the bending roll force adjustment operation through the work roll, wherein the bending roll force adjustment time of the bending roll force adjustment operation is equal to the rolling force adjustment time.
[0014] According to a second aspect of the embodiments of this application, a control device for strip rolling in a pickling line is provided, the device comprising: An acquisition unit is used to acquire strip information of the strip to be rolled and production line information of the pickling line; a first determination unit is used to determine the target rolling force of the strip based on the strip information and the target unit speed of the pickling line based on the production line information. The second determining unit is used to determine the rolling force adjustment time of the rolling force adjustment operation based on the current rolling force and the target rolling force, and to determine the deceleration adjustment time of the positioning deceleration operation based on the current unit speed and the target unit speed. The first control unit is used to control the pickling line to simultaneously complete the rolling force adjustment operation and the positioning speed reduction operation based on the rolling force adjustment time and the speed reduction adjustment time.
[0015] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, the computer-readable storage medium storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by a processor to perform the operation as described in any of the first aspects above.
[0016] According to a fourth aspect of the present application, an electronic device is provided, the electronic device including one or more processors and one or more memories, the one or more memories storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by the one or more processors to implement the method described in any of the embodiments of the first aspect above.
[0017] This application acquires information about the strip to be rolled and the production line information of the pickling line; determines the target rolling force of the strip based on the strip information, and determines the target unit speed of the pickling line based on the production line information; determines the rolling force adjustment time for the rolling force adjustment operation based on the current rolling force and the target rolling force, and determines the deceleration adjustment time for the positioning deceleration operation based on the current unit speed and the target unit speed; and controls the pickling line to simultaneously complete the rolling force adjustment operation and the positioning deceleration operation based on the rolling force adjustment time and the deceleration adjustment time. In other words, by establishing an intelligent collaborative control mechanism for rolling force and unit speed, intelligently deciding the execution sequence, improving the rolling force, and ensuring the dual requirements of surface modification effect and safe weld passage under high rolling force, zinc flow defects are reduced, yield is improved, and synergistic optimization of surface quality and production efficiency is achieved.
[0018] 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
[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 A flowchart of the control method for strip rolling in a pickling line according to an embodiment of this application is shown; Figure 2 A schematic diagram of a scenario in which the pickling line of the present application embodiments can be applied is shown; Figure 3 A flowchart illustrating the control process of strip rolling in the pickling line according to an embodiment of this application is shown; Figure 4 A block diagram of the control device for strip rolling in a pickling line according to an embodiment of this application is shown; Figure 5 A schematic diagram of the structure of an electronic device in an embodiment of this application is shown. Detailed Implementation
[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0021] 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.
[0022] 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.
[0023] 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.
[0024] 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.
[0025] It should also 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.
[0026] Figure 1 A flowchart illustrating the control method for strip rolling in a pickling line according to an embodiment of this application is shown. This control method for strip rolling in a pickling line can be executed by equipment with computational processing capabilities in the pickling line. (Refer to...) Figure 1 As shown, the control method for strip rolling in this pickling line includes: Step 101: Obtain the strip information to be rolled and the production line information of the pickling line; Step 102: Determine the target rolling force of the strip based on the strip information, and determine the target unit speed of the pickling line based on the production line information; Step 103: Determine the rolling force adjustment time for the rolling force adjustment operation based on the current rolling force and the target rolling force, and determine the deceleration adjustment time for the positioning deceleration operation based on the current unit speed and the target unit speed; Step 104: Based on the rolling force adjustment time and the deceleration adjustment time, control the pickling line to simultaneously complete the rolling force adjustment operation and the positioning deceleration operation.
[0027] This application acquires information about the strip steel to be rolled and the production line information of the pickling line; determines the target rolling force of the strip steel based on the strip steel information, and determines the target unit speed of the pickling line based on the production line information; determines the rolling force adjustment time for the rolling force adjustment operation based on the current rolling force and the target rolling force, and determines the deceleration adjustment time for the positioning deceleration operation based on the current unit speed and the target unit speed; and controls the pickling line to simultaneously complete the rolling force adjustment operation and the positioning deceleration operation based on the rolling force adjustment time and the deceleration adjustment time. In other words, by establishing an intelligent collaborative control mechanism between rolling force and unit speed, the surface uniformity and roughness of the pickled sheet are improved, zinc flow marks quality defects in the subsequent hot-dip galvanizing process are reduced, and product quality stability and yield are improved.
[0028] To enable those skilled in the art to better understand the method proposed in this application, in conjunction with Figure 2 A brief description of the pickling line in this application is provided. Figure 2 A schematic diagram of a pickling line scenario applicable to embodiments of this application is shown, such as... Figure 2 As shown, the strip steel 20 to be rolled is placed in the pickling tank 21 to remove surface iron oxide scale. The leveling mill support roll 22 provides rolling force under the action of a hydraulic cylinder, and the rolling force is applied to the strip steel through the work roll 23 to improve the surface uniformity of the strip steel. At the same time, the work roll 23 generates bending force under the action of a bending cylinder to improve the strip steel profile after rolling. The leveling mill front tension roll 24 and the leveling mill rear tension roll 25 work together to tighten the strip steel and maintain the strip steel tension during the rolling process. The processor 26 contains a computer program to complete the process of adjusting and controlling the rolling force and bending force in this application.
[0029] For example, in the pickling line, work rolls with a roughness of ≤2.5um are used. Based on the strength and width of the steel grade, the action of a cold rolling mill is simulated to significantly increase the unit rolling force, and finally increase the total rolling force to a maximum of 8000KN. The surface uniformity of the strip is improved by the larger rolling force.
[0030] Under the aforementioned high rolling force, the weld seam will crack, leading to weld strip breakage. Therefore, a reduced rolling force mode is required to pass through the weld seam. Through numerous experiments, it was found that reducing the rolling force to 3000KN and simultaneously reducing the unit speed to a maximum of 150 meters per minute can ensure that the weld seam passes through the leveling machine smoothly without breaking the strip, while also ensuring the overall operating efficiency of the unit.
[0031] To reduce the occurrence rate of mid-waves and improve the rolling effect under higher rolling forces, a working roll crown of 60μm is adopted in the diameter direction. The bending roll force is given according to 10%-15% of the total rolling force. At the same time, the bending roll force is automatically matched and adjusted with the rolling force to ensure good strip shape under higher rolling forces and through the weld section.
[0032] Under the aforementioned high rolling force, the strip steel thins significantly. Therefore, the thickness compensation value needs to be designed in advance for the next hot rolling process to eliminate the thinning caused by the increased rolling force, and the thinning thickness should be controlled within 50μm.
[0033] In the embodiment provided in step 101, the strip steel to be rolled is hot-rolled strip steel (steel coils that have had their surface oxide layer removed by pickling but have not been cold-rolled) that is about to enter the leveling and rolling process of the pickling line. In related technologies, the surface of the pickled strip steel has problems such as tiny pits and uneven roughness, which directly affect the quality of subsequent hot-dip galvanizing. Moreover, compared with traditional cold-rolled strip steel, its microstructure is looser, and its surface condition needs to be improved through special rolling processes.
[0034] Optionally, in this embodiment, the strip information mentioned above is a data set used to characterize the physical properties and process requirements of the strip, which may include, but is not limited to, basic parameters, mechanical properties, surface condition, and weld information. The basic parameters may include, but are not limited to, steel grade (e.g., 450GD), width (e.g., 1500mm), and thickness (e.g., 2.0mm). The mechanical properties may include, but are not limited to, yield strength and tensile strength (key factors determining unit rolling force). The surface condition may include, but is not limited to, roughness after pickling (e.g., ≤2.5μm) and the degree of oxide layer removal. The weld information may include, but is not limited to, weld location and welding process type (affecting the speed reduction strategy when passing through the weld).
[0035] Optionally, in this embodiment, the aforementioned production line information is a data set reflecting the real-time operating status of the pickling line, which may include, but is not limited to, equipment parameters, process status, location information, and control parameters. The aforementioned equipment parameters may include, but are not limited to, the crown of the leveling machine's work rolls (e.g., 60μm) and the maximum pressure of the hydraulic cylinder (e.g., 8000KN). The aforementioned process status may include, but is not limited to, the current unit speed (e.g., 300 m / min) and the tension roll pressure. The aforementioned location information may include, but is not limited to, the real-time distance between the weld seam and the leveling machine. The aforementioned control parameters may include, but are not limited to, the positioning ramp rate (e.g., b = 0.4 m / s) and the rolling force adjustment rate (e.g., a = 3000 KN / s).
[0036] In the embodiment provided in step 102, the target rolling force is an optimal rolling pressure value dynamically calculated based on the strip characteristics. It is applied to the work rolls via a hydraulic cylinder to induce plastic deformation in the strip, thereby improving surface quality.
[0037] Optionally, in this embodiment, after the strip head is leveled, determining the target rolling force of the strip based on the strip information may include, but is not limited to, adjusting the rolling force according to a high unit rolling force for high-strength steel and a low unit rolling force for low-strength steel, based on the current strip's steel grade, thickness, width, and other information.
[0038] While determining the target rolling force for the strip, the target bending roll force can also be determined based on the strip information. According to the current information such as the steel grade, thickness, and width of the strip, for high-strength steel grades, the rolling force is adjusted according to the high unit rolling force, and the bending roll force is adjusted according to the first percentage of the actual rolling force; for low-strength steel grades, the rolling force is adjusted according to the low unit rolling force, and the bending roll force is adjusted according to the second percentage of the actual rolling force, with the first percentage being higher than the second percentage.
[0039] Taking high-strength steel grades of 450GD and above, and low-strength steel grades of below 450GD as examples, with a high unit rolling force of 5.2KN / mm and a low unit rolling force of 4.7KN / mm, and a first percentage of 10-20% and a second percentage of 10-15%, the rolling force is adjusted according to a unit rolling force of 5.2KN / mm for high-strength steel grades of 450GD and above, and the bending roll force is adjusted according to 10-20% of the actual rolling force. For steel grades of below 450GD, the rolling force is adjusted according to a unit rolling force of 4.7KN / mm, and the bending roll force is adjusted according to 10-15% of the actual rolling force.
[0040] Optionally, in this embodiment, the target unit speed is the optimal production line operating speed set to adapt to the needs of different process sections. The target unit speed can be determined by, but is not limited to, by presetting the optimal production line operating speed, or it can be updated based on the real-time operating status of the production line.
[0041] In the embodiment provided in step 103, the current rolling force can be directly measured by a pressure sensor. The rolling pressure (unit: kN) applied to the strip is adjusted in real time by a hydraulic cylinder via the work rolls through a rolling force adjustment operation.
[0042] Optionally, in this embodiment, the current unit speed can be measured by an encoder. The unit speed is adjusted according to a preset rule before the weld reaches the leveling machine via a positioning and speed reduction operation.
[0043] Optionally, in this embodiment, the rolling force adjustment time is the time required to adjust the rolling force from its current value to the target value. The speed reduction adjustment time is the time required to reduce the speed from the current speed to the target speed.
[0044] In one embodiment of this application, the pickling line can be controlled to simultaneously perform the rolling force adjustment operation and the positioning deceleration operation based on the rolling force adjustment time and the deceleration adjustment time in the following manner: determining a first execution timing of the rolling force adjustment operation and a second execution timing of the positioning deceleration operation based on the rolling force adjustment time and the deceleration adjustment time; controlling the pickling line to perform the rolling force adjustment operation based on the first execution timing, and controlling the pickling line to perform the positioning deceleration operation based on the second execution timing.
[0045] Optionally, in this embodiment, the first execution timing mentioned above is the starting moment of triggering the rolling force adjustment operation, which needs to meet any of the following conditions: time condition, that is, the remaining time from the weld to the leveling machine = rolling force adjustment time; position condition, that is, the distance from the weld to the leveling machine = dynamically calculated rolling force adjustment point.
[0046] Optionally, in this embodiment, the second execution timing is the starting moment of triggering the positioning and speed reduction operation, which needs to meet any of the following conditions: time condition, that is, the remaining time from the weld to the leveling machine = speed reduction adjustment time; position condition, that is, the distance from the weld to the leveling machine = speed reduction distance.
[0047] It should be noted that the methods for determining the first and second execution timings mentioned above are based on the production line architecture. That is, when the pickling line adjusts the production process based on time, it needs to meet the corresponding time conditions; and when the pickling line adjusts the production process based on distance detection, it needs to meet the corresponding distance conditions.
[0048] Optionally, in this embodiment, when the rolling force adjustment time is greater than the deceleration adjustment time, the rolling force adjustment is initiated immediately (first execution timing), and a deceleration operation is triggered at a time after the time difference between the two (second execution timing); conversely, if the rolling force adjustment time is less than the deceleration adjustment time, the speed is immediately reduced (second execution timing), and the rolling force is adjusted again after a time difference (first execution timing); if the two times are equal, the rolling force adjustment and deceleration operations are executed synchronously. This timing control strategy ensures that the rolling force and speed are precisely matched when the weld passes through the leveling machine by dynamically coordinating the order of the two parameter adjustments, thereby resolving the contradiction between the risk of strip breakage and production efficiency under high rolling force.
[0049] In an embodiment of the present application, the first execution timing of the rolling force adjustment operation and the second execution timing of the positioning speed reduction operation can be determined based on the rolling force adjustment time and the speed reduction adjustment time, but not limited to the following methods: If the rolling force adjustment time is greater than the speed reduction adjustment time, determine the current moment as the first execution timing, and determine the first expected moment after the current moment passes through the first time as the second execution timing, where the first time is the difference between the rolling force adjustment time and the speed reduction adjustment time; If the rolling force adjustment time is less than the speed reduction adjustment time, determine the current moment as the second execution timing, and determine the second expected moment after the current moment passes through the second time as the first execution timing, where the second time is the difference between the rolling force adjustment time and the speed reduction adjustment time; If the rolling force adjustment time is equal to the speed reduction adjustment time, determine that both the first execution timing and the second execution timing are the current moment.
[0050] Optionally, in this embodiment, the execution order is determined by directly comparing the numerical relationship between the rolling force adjustment time T1 and the speed reduction adjustment time T2: When T1 > T2, start the rolling force adjustment immediately and start the speed reduction after a delay of (T1 - T2); When T1 < T2, first reduce the speed and then adjust the rolling force after a delay of (T2 - T1); When they are equal, execute synchronously. Compared with the distance trigger method that requires real-time tracking of the weld position, this solution only relies on time parameter calculation and has the advantages of simple implementation and small computational complexity, especially suitable for production scenarios with stable speeds.
[0051] In one embodiment of this application, the pickling line includes a leveling mill support roll. The first execution timing of the rolling force adjustment operation and the second execution timing of the positioning and deceleration operation can be determined, but is not limited to, based on the rolling force adjustment time and the deceleration adjustment time, in the following manner: obtaining the current distance between the weld seam of the strip and the leveling mill support roll as the first distance; if the rolling force adjustment time is greater than the deceleration adjustment time, determining the first execution timing as when the distance between the weld seam and the leveling mill support roll is equal to the first distance, and determining the second execution timing based on the rolling force adjustment time, the deceleration adjustment time, the current mill speed, and the target mill speed, wherein... The second execution timing occurs after the first execution timing. If the rolling force adjustment time is less than the deceleration adjustment time, the second execution timing is determined to be when the distance between the weld and the leveling machine support roll is equal to the first distance. The first execution timing is determined based on the rolling force adjustment time, the deceleration adjustment time, the current unit speed, the target unit speed, and the positioning ramp rate of the pickling line, wherein the first execution timing occurs after the second execution timing. If the rolling force adjustment time is equal to the deceleration adjustment time, both the first and second execution timings are determined to be when the distance between the weld and the leveling machine support roll is equal to the first distance.
[0052] Optionally, in this embodiment, the current distance between the weld seam of the strip and the support roller of the leveling machine is obtained as the first distance; If the rolling force adjustment time T1 is less than the speed reduction adjustment time T2, then the positioning speed reduction operation is performed first. The rolling force adjustment point is indicated by the distance between the weld seam and the leveling machine, and is determined by the formula. Calculate the second distance, where, The current unit speed, For the target unit speed, To determine the ramp rate; If the rolling force adjustment time T1 > the deceleration adjustment time T2, the rolling force adjustment operation is performed first, and the positioning deceleration control is performed when the predetermined positioning point is reached. The rolling force adjustment point is represented by the distance between the weld seam and the leveling machine using the formula. Calculate the second distance, where, This is the first distance; If the rolling force adjustment time T1 equals the speed reduction adjustment time T2, the rolling adjustment operation and the positioning speed reduction operation are executed simultaneously.
[0053] Optionally, in this embodiment, by real-time monitoring the current distance (the first distance) between the strip weld and the temper mill backup roll, the execution timing of rolling force adjustment and the unit speed reduction is dynamically determined: when the rolling force adjustment time is greater than the speed reduction adjustment time, the rolling force adjustment is immediately started (the first execution timing) when the weld reaches the first distance, and then the speed reduction operation timing is calculated according to the speed parameter (the second execution timing); otherwise, the speed reduction operation (the second execution timing) is triggered first and then the rolling force adjustment is started after a delay (the first execution timing); if the two times are equal, they are executed synchronously.
[0054] Compared with calculating the execution sequence based on the pure time difference, the distance-triggered method converts the time difference into a spatial distance trigger and realizes dynamic adjustment by real-time tracking the weld position. It can better adapt to the speed fluctuation condition, has higher control accuracy but requires adding a position detection system. Through the coupled control of spatial coordinates and time parameters, while ensuring process safety, the length of the transition section is shortened by 18%, further improving the production efficiency.
[0055] In the embodiment provided in step 104, by dynamically coordinating the timing relationship between the rolling force adjustment time (T1) and the speed reduction adjustment time (T2), the efficient collaborative control of the pickling line is achieved: when T1 > T2, the rolling force adjustment operation is immediately started, and the positioning speed reduction operation is triggered after a delay of (T1 - T2); when T1 < T2, the positioning speed reduction operation is first executed, and the rolling force adjustment is carried out after a delay of (T2 - T1); if T1 = T2, the two operations are executed synchronously. This two-parameter collaborative control strategy based on the time difference, by precisely matching the timing relationship between the rolling force adjustment and the unit speed change, not only ensures the surface quality of the strip under high rolling force (up to 8000 KN), but also avoids the risk of strip breakage in the weld section (speed ≤ 150 m / min), shortens the length of the transition section, and significantly improves the production efficiency and product yield.
[0056] In an embodiment of the present application, the pickling line includes a temper mill backup roll, a work roll, and a hydraulic cylinder. The work roll is arranged between the temper mill backup roll and the strip, and the hydraulic cylinder is used to apply the rolling force to the strip through the work roll. The pickling line can be controlled to perform the rolling force adjustment operation and the positioning speed reduction operation based on the first execution timing and the second execution timing in the following ways, but not limited to: when the first execution timing arrives, control the hydraulic cylinder to perform the rolling force adjustment operation through the work roll; when the second execution timing arrives, control the pickling line to perform the positioning speed reduction operation.
[0057] In one embodiment of this application, the rolling force adjustment time of the rolling force adjustment operation can be determined based on the current rolling force and the target rolling force in the following manner: obtaining the current rolling force and the positioning ramp rate; calculating the rolling force difference between the current rolling force and the target rolling force; and determining the ratio of the rolling force difference to the positioning ramp rate as the rolling force adjustment time.
[0058] Optionally, in this embodiment, the total rolling force (i.e., the current rolling force) = unit rolling force × strip width. If the width of the incoming strip is 1500mm, the total rolling force F1 can be calculated as 5.2 × 1500 = 7800KN. The ramp rate for adjusting the rolling force (i.e., the positioning ramp rate) is a = 3000KN / s. Therefore, the predetermined adjustment time for the rolling force (i.e., the rolling force adjustment time) is... .
[0059] It should be noted that the process of determining the rolling force adjustment time can be performed by a rolling force reduction model established based on the currently used rolling force, or by the processor based on a simple mathematical model.
[0060] In one embodiment of this application, the deceleration adjustment time for a positioning deceleration operation can be determined based on the current unit speed and the target unit speed in the following manner: acquiring the current unit speed and the deceleration ramp rate; calculating the speed difference between the current unit speed and the target unit speed; and determining the ratio of the speed difference to the deceleration ramp rate as the deceleration adjustment time.
[0061] Optionally, in this embodiment, if the current unit speed V1 = 300 m / min, the final weld seam passes through the leveling machine at a speed of V2 = 150 m / min, the positioning ramp speed is b = 0.4 m / s, and the deceleration time is... The deceleration time T2 is calculated to be 6.25 seconds. If the current unit speed is 180 meters per minute, with the same positioning ramp rate b, the required deceleration time T2 is calculated to be 1.25 seconds.
[0062] It should be noted that the process of determining the aforementioned deceleration adjustment time can be executed by the weld positioning model established based on the current unit speed, or by the processor based on a simple mathematical model.
[0063] In one embodiment of this application, the pickling line further includes a work roll, which includes a leveling machine support roll, a work roll hydraulic cylinder, and a bending roll cylinder. The work roll is deployed between the leveling machine support roll and the strip. The hydraulic cylinder is used to apply rolling force to the strip through the work roll. The work roll generates bending force under the action of the bending roll cylinder. In the process of controlling the hydraulic cylinder to perform the rolling force adjustment operation through the work roll, the method may, but is not limited to, the following: controlling the bending roll cylinder to perform the bending roll force adjustment operation through the work roll, wherein the bending roll force adjustment time of the bending roll force adjustment operation is equal to the rolling force adjustment time.
[0064] Table 1
[0065] Optionally, in this embodiment, the bending roll force output value is adjusted accordingly during the rolling force adjustment process based on the bending roll force following model. Adjustment coefficients as shown in Table 1 are applied for strips of different widths. Simultaneously, the bending roll force F2 adjustment time T3 is kept consistent with the rolling force adjustment time T1, i.e., T3 = T1, and the bending roll force adjustment rate is dynamically calculated. This allows for the synchronous adjustment of bending force and rolling force.
[0066] Optionally, in this embodiment, when the weld seam is detected to have passed 0.5 meters through the leveling machine, the rolling force is restored to the normal value according to the slope rate, and the bending roll force is simultaneously restored to the normal value according to the dynamically calculated bending roll force adjustment rate c. When the rolling force and bending roll force are uniformly restored to the normal value, the unit automatically speeds up production.
[0067] To help those skilled in the art better understand the above-mentioned control method for strip rolling in pickling lines, the following will be combined with... Figure 3 To explain, Figure 3 A flowchart illustrating the control process of strip rolling in the pickling line according to an embodiment of this application is shown, such as... Figure 3 As shown, the strip rolling process in the pickling line can be controlled, but is not limited to, through the following methods: Step 301: Obtain information on the strip steel to be rolled and the production line information of the pickling line; Step 302: Determine the target rolling force and target bending roll force based on strip steel information, and determine the target mill speed based on production line information; Step 303: Determine the rolling force adjustment time based on the current rolling force and the target rolling force, determine the speed reduction adjustment time based on the current unit speed and the target unit speed, and determine the rolling force adjustment time as the bending roll force adjustment time of the bending roll force adjustment operation; Step 304: Determine the execution sequence of the rolling force adjustment operation and the positioning speed reduction operation based on the rolling force adjustment time and the speed reduction adjustment time; Step 305: Perform the rolling force adjustment operation and the positioning speed reduction operation in the order of rolling force adjustment operation and positioning speed reduction operation, and perform the bending roll force adjustment operation while performing the rolling force adjustment operation; Step 306: After detecting that the weld has passed through the leveling machine, the rolling force and bending roll force are restored synchronously, and the positioning control is terminated. The unit continues high-speed rolling.
[0068] The above process improves the uniformity of the strip surface, achieving the same effect as strip that has undergone cold rolling. This reduces quality defects such as zinc flow marks during subsequent hot-dip galvanizing, ensuring smooth production on the hot-dip galvanizing line. Simultaneously, it reduces the length of defects in the transition section before and after the weld, ensuring the strip shape, lowering scrap output from the pickling line, and controlling production costs.
[0069] In one embodiment of this application, a control system for strip rolling in a pickling line is provided, which improves the strip rolling effect, enhances the strip shape control capability, and increases the unit's operating efficiency. The system includes: a material information acquisition module, a positioning control module, a rolling force adjustment module, and a bending roll force following control module.
[0070] The material information acquisition module is used to acquire information such as the steel type and specifications of the strip currently being rolled and the next coil to be rolled, and at the same time, to acquire the real-time distance from the head of the next coil to the leveling machine, and to calculate the remaining time based on the current speed.
[0071] The positioning control module is used to calculate the distance required for deceleration in real time based on the actual operating speed of the unit and the preset speed value that the unit should reduce to when the weld is at a fixed position point away from the leveling machine, and to obtain the first deceleration point and the first deceleration time.
[0072] The rolling force adjustment module calculates the first rolling force reduction point based on the rolling force reduction model and the current actual rolling force, and continuously adjusts the rolling force setting value according to the predetermined slope speed until the actual rolling force is reduced to the predetermined value.
[0073] The bending roll force following control module adjusts the set value according to the actual rolling force application and the bending roll force control model. During the process of reducing rolling force through the weld, the setting value of the bending roll force is continuously adjusted according to the predetermined model to match the rolling force application value.
[0074] The following describes an embodiment of the apparatus described in this application, which can be used to execute the control method for strip rolling in a pickling line as 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 control method for strip rolling in a pickling line described above in this application.
[0075] See Figure 4 The diagram shows a block diagram of the control device for strip rolling in the pickling line according to an embodiment of this application.
[0076] like Figure 4 As shown, the control device (400) for strip rolling in the pickling line according to an embodiment of this application includes: an acquisition unit 401, a first determination unit 402, a second determination unit 403, and a first control unit 404.
[0077] The system includes: an acquisition unit for acquiring strip information to be rolled and production line information of the pickling line; a first determination unit for determining the target rolling force of the strip based on the strip information and the target unit speed of the pickling line based on the production line information; a second determination unit for determining the rolling force adjustment time of the rolling force adjustment operation based on the current rolling force and the target rolling force, and for determining the deceleration adjustment time of the positioning deceleration operation based on the current unit speed and the target unit speed; and a first control unit for controlling the pickling line to simultaneously complete the rolling force adjustment operation and the positioning deceleration operation based on the rolling force adjustment time and the deceleration adjustment time.
[0078] In some embodiments of this application, based on the foregoing scheme, the first control unit is configured to: determine a first execution timing of the rolling force adjustment operation and a second execution timing of the positioning and deceleration operation based on the rolling force adjustment time and the deceleration adjustment time; control the pickling line to perform the rolling force adjustment operation based on the first execution timing, and control the pickling line to perform the positioning and deceleration operation based on the second execution timing.
[0079] In some embodiments of this application, based on the foregoing scheme, the first control unit is configured to: if the rolling force adjustment time is greater than the deceleration adjustment time, determine the current moment as the first execution opportunity, and determine the first expected moment after the current moment elapses through a first time as the second execution opportunity, wherein the first time is the difference between the rolling force adjustment time and the deceleration adjustment time; if the rolling force adjustment time is less than the deceleration adjustment time, determine the current moment as the second execution opportunity, and determine the second expected moment after the current moment elapses through a second time as the first execution opportunity, wherein the second time is the difference between the rolling force adjustment time and the deceleration adjustment time; if the rolling force adjustment time is equal to the deceleration adjustment time, determine that both the first execution opportunity and the second execution opportunity are the current moment.
[0080] In some embodiments of this application, based on the foregoing scheme, the pickling line includes a leveling mill support roll, and the second determining unit is configured to: obtain the current distance between the weld seam of the strip and the leveling mill support roll as a first distance; if the rolling force adjustment time is greater than the deceleration adjustment time, determine the first execution timing when the distance between the weld seam and the leveling mill support roll is equal to the first distance, and determine the second execution timing based on the rolling force adjustment time, the deceleration adjustment time, the current unit speed, and the target unit speed, wherein the second execution timing is after the first execution timing; if the If the rolling force adjustment time is less than the deceleration adjustment time, the second execution timing is determined to be when the distance between the weld and the leveling mill support roll is equal to the first distance. The first execution timing is determined based on the rolling force adjustment time, the deceleration adjustment time, the current unit speed, the target unit speed, and the positioning ramp rate of the pickling line, wherein the first execution timing is after the second execution timing. If the rolling force adjustment time is equal to the deceleration adjustment time, both the first and second execution timings are determined to be when the distance between the weld and the leveling mill support roll is equal to the first distance.
[0081] In some embodiments of this application, based on the foregoing scheme, the pickling line includes a leveling machine support roll, a work roll, and a hydraulic cylinder. The work roll is deployed between the leveling machine support roll and the strip. The hydraulic cylinder is used to apply rolling force to the strip through the work roll. The first control unit is configured to: control the hydraulic cylinder to perform the rolling force adjustment operation through the work roll when the first execution timing arrives; and control the pickling line to perform the positioning and speed reduction operation when the second execution timing arrives.
[0082] In some embodiments of this application, based on the foregoing scheme, the second determining unit is configured to: acquire the current rolling force and the positioning ramp rate; calculate the rolling force difference between the current rolling force and the target rolling force; and determine the ratio of the rolling force difference to the positioning ramp rate as the rolling force adjustment time; the second determining unit is configured to: acquire the current unit speed and the deceleration ramp rate; calculate the speed difference between the current unit speed and the target unit speed; and determine the ratio of the speed difference to the deceleration ramp rate as the deceleration adjustment time.
[0083] In some embodiments of this application, based on the foregoing scheme, the pickling line further includes a work roll, the pickling line includes a leveling machine support roll, a work roll hydraulic cylinder, and a bending roll cylinder, the work roll is deployed between the leveling machine support roll and the strip, the hydraulic cylinder is used to apply rolling force to the strip through the work roll, the work roll generates bending force under the action of the bending roll cylinder, and in the process of controlling the hydraulic cylinder to perform the rolling force adjustment operation through the work roll, the device further includes: The second control unit is used to control the bending roll cylinder to perform bending roll force adjustment operation through the work roll, wherein the bending roll force adjustment time of the bending roll force adjustment operation is equal to the rolling force adjustment time.
[0084] Based on the same inventive concept, embodiments of this application provide a computer-readable storage medium storing at least one computer program instruction, which is loaded and executed by a processor to perform the operations described above.
[0085] Based on the same inventive concept, this application also provides an electronic device, see reference. Figure 5 The diagram shows a schematic of the structure of an electronic device according to an embodiment of this application. The electronic device includes one or more memories 504, one or more processors 502, and at least one computer program (computer program instruction) stored in the memory 504 and executable on the processor 502. When the processor 502 executes the computer program, it implements the method described above.
[0086] Among them, Figure 5 In this document, a bus architecture (represented by bus 500) is used. Bus 500 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 502 and memory represented by memory 504. Bus 500 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 505 provides an interface between bus 500 and receiver 501 and transmitter 503. Receiver 501 and transmitter 503 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 502 is responsible for managing bus 500 and general processing, while memory 504 can be used to store data used by processor 502 during operation.
[0087] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.
[0088] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.
[0089] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.
[0090] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing computer program instructions, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.
[0091] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A method for controlling the rolling of strip steel in a pickling line, characterized in that, The method includes: Obtain information about the strip steel to be rolled and the production line information of the pickling line; The target rolling force of the strip is determined based on the strip information, and the target unit speed of the pickling line is determined based on the production line information. The rolling force adjustment time for the rolling force adjustment operation is determined based on the current rolling force and the target rolling force, and the deceleration adjustment time for the positioning deceleration operation is determined based on the current unit speed and the target unit speed. Based on the rolling force adjustment time and the deceleration adjustment time, the pickling line is controlled to simultaneously complete the rolling force adjustment operation and the positioning deceleration operation.
2. The method according to claim 1, characterized in that, The method of controlling the pickling line to simultaneously complete the rolling force adjustment operation and the positioning and deceleration operation based on the rolling force adjustment time and the deceleration time includes: The first execution timing of the rolling force adjustment operation and the second execution timing of the positioning and deceleration operation are determined based on the rolling force adjustment time and the deceleration adjustment time. Based on the first execution timing, the pickling line is controlled to perform the rolling force adjustment operation, and based on the second execution timing, the pickling line is controlled to perform the positioning and speed reduction operation.
3. The method according to claim 2, characterized in that, The determination of the first execution timing of the rolling force adjustment operation and the second execution timing of the positioning and deceleration operation based on the rolling force adjustment time and the deceleration adjustment time includes: If the rolling force adjustment time is greater than the deceleration adjustment time, the current moment is determined as the first execution opportunity, and the first expected moment after the current moment has elapsed for a first time is determined as the second execution opportunity, wherein the first time is the difference between the rolling force adjustment time and the deceleration adjustment time; If the rolling force adjustment time is less than the deceleration adjustment time, the current moment is determined as the second execution opportunity, and the second expected moment after the current moment has elapsed for a second time is determined as the first execution opportunity, wherein the second time is the difference between the rolling force adjustment time and the deceleration adjustment time; If the rolling force adjustment time is equal to the deceleration adjustment time, then both the first execution timing and the second execution timing are determined to be the current moment.
4. The method according to claim 2, characterized in that, The pickling line includes leveling mill support rolls. Determining the first execution timing of the rolling force adjustment operation and the second execution timing of the positioning and deceleration operation based on the rolling force adjustment time and the deceleration adjustment time includes: The current distance between the weld seam of the strip and the support roller of the leveling machine is obtained as the first distance; If the rolling force adjustment time is greater than the deceleration adjustment time, the first execution timing is determined to be when the distance between the weld and the leveling mill support roll is equal to the first distance, and the second execution timing is determined based on the rolling force adjustment time, the deceleration adjustment time, the current unit speed and the target unit speed, wherein the second execution timing is after the first execution timing; If the rolling force adjustment time is less than the deceleration adjustment time, the second execution timing is determined to be when the distance between the weld and the leveling mill support roll is equal to the first distance. The first execution timing is determined based on the rolling force adjustment time, the deceleration adjustment time, the current unit speed, the target unit speed, and the positioning ramp rate of the pickling line. The first execution timing is after the second execution timing. If the rolling force adjustment time is equal to the deceleration adjustment time, then the first execution timing and the second execution timing are both determined to be when the distance between the weld and the leveling machine support roller is equal to the first distance.
5. The method according to claim 2, characterized in that, The pickling line includes a leveling mill support roll, a work roll, and a hydraulic cylinder. The work roll is deployed between the leveling mill support roll and the strip. The hydraulic cylinder is used to apply rolling force to the strip through the work roll. Controlling the pickling line to perform the rolling force adjustment operation and the positioning and speed reduction operation based on the first and second execution timings includes: When the first execution opportunity arrives, the hydraulic cylinder is controlled to perform the rolling force adjustment operation through the work roll; When the second execution opportunity arrives, the pickling line is controlled to perform the positioning and deceleration operation.
6. The method according to claim 1, characterized in that, The method of determining the rolling force adjustment time based on the current rolling force and the target rolling force includes: acquiring the current rolling force and the positioning ramp rate; calculating the rolling force difference between the current rolling force and the target rolling force; and determining the ratio of the rolling force difference to the positioning ramp rate as the rolling force adjustment time. The step of determining the deceleration adjustment time for the positioning deceleration operation based on the current unit speed and the target unit speed includes: acquiring the current unit speed and the deceleration ramp rate; calculating the speed difference between the current unit speed and the target unit speed; and determining the ratio of the speed difference to the deceleration ramp rate as the deceleration adjustment time.
7. The method according to any one of claims 1 to 6, characterized in that, The pickling line also includes work rolls, and includes leveling mill support rolls, work roll hydraulic cylinders, and bending roll cylinders. The work rolls are deployed between the leveling mill support rolls and the strip. The hydraulic cylinders are used to apply rolling force to the strip through the work rolls. The work rolls generate bending force under the action of the bending roll cylinders. In the process of controlling the hydraulic cylinders to perform the rolling force adjustment operation through the work rolls, the method further includes: The bending roll cylinder is controlled to perform a bending roll force adjustment operation through the work roll, wherein the bending roll force adjustment time is equal to the rolling force adjustment time.
8. A control device for strip rolling in a pickling line, characterized in that, The device includes: The acquisition unit is used to acquire strip information of the strip to be rolled and production line information of the pickling line; The first determining unit is used to determine the target rolling force of the strip based on the strip information, and to determine the target unit speed of the pickling line based on the production line information. The second determining unit is used to determine the rolling force adjustment time of the rolling force adjustment operation based on the current rolling force and the target rolling force, and to determine the deceleration adjustment time of the positioning deceleration operation based on the current unit speed and the target unit speed. The first control unit is used to control the pickling line to simultaneously complete the rolling force adjustment operation and the positioning speed reduction operation based on the rolling force adjustment time and the speed reduction adjustment time.
9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions that are loaded and executed by a processor to perform the operations described in any one of claims 1 to 7.
10. An electronic device comprising a processor and a memory, characterized in that, The memory stores computer program instructions that can be executed by the processor, and when the processor executes the computer program instructions, it implements the instructions of the method as described in any one of claims 1 to 7.