Method, device and storage medium for controlling two-position production of a hot coil box

Abstract

The application discloses a control method and device for double-position production of a hot coil box and a storage medium, relates to the technical field of hot-rolled plate strip production, and comprises the following steps: acquiring a current working state signal of the hot coil box and tracking information of an intermediate blank; determining a working phase of the hot coil box based on the current working state signal; when the working phase is that an uncoiling station is executing an uncoiling and feeding action, starting a coiling preparation action of the next intermediate blank in the coiling station in parallel; when the working phase is that the coiling of the current intermediate blank is completed in the coiling station, determining an access condition of a finishing mill based on the tracking information of the intermediate blank; and controlling the uncoiling station to execute the uncoiling and feeding action of the coiled intermediate blank based on the access condition of the finishing mill.

Description

Technical Field

[0001] This application relates to the field of hot-rolled strip steel production technology, and in particular to a control method, equipment and storage medium for hot-rolled coil box dual-position production. Background Technology

[0002] In the hot-rolled strip steel production process, the hot coil box is a key piece of equipment connecting the roughing and finishing rolling processes. Its core function is to coil the high-temperature intermediate billets after roughing into intermediate coils for temporary storage, and then uncoil them and send them to the finishing mill for subsequent rolling. Structurally, the hot coil box typically has independent coiling and uncoiling stations, theoretically capable of handling two intermediate coils simultaneously. That is, while one intermediate coil is being uncoiled and sent to the finishing mill, the coiling station can prepare for coiling the next intermediate billet in parallel; this mode is called "dual-station production." However, in actual production, due to limitations in the original control program design, the coiling and uncoiling operations of the hot coil box have long been in a strictly sequential control mode. This means that preparation for coiling the next intermediate billet can only begin after the previous intermediate coil has completely completed the uncoiling and sending process. This single-coil production mode results in unnecessary waiting time for the intermediate billets between the last pass of roughing and their entry into the finishing mill, prolonging the rolling rhythm and becoming one of the key bottlenecks restricting the further utilization of the entire hot-rolling production line's capacity. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] This application specifically includes the following aspects: Firstly, this application proposes a control method for dual-station hot roll production, comprising: Acquire the current operating status signal of the hot roll box and the tracking information of the intermediate billet; Based on the current working status signal, the working stage of the hot roll box is determined; When the working stage is when the uncoiling station is performing the uncoiling and feeding action, the parallel control winding station starts the winding preparation action for the next intermediate billet; When the working stage is when the coiling station completes the coiling of the current intermediate billet, the access conditions of the finishing mill are determined based on the tracking information of the intermediate billet. Based on the access conditions of the finishing mill, the uncoiling station is controlled to perform the uncoiling and feeding action of the already coiled intermediate billet.

[0005] In one feasible implementation, the parallel control winding station initiates the winding preparation action for the next intermediate blank, including: When the unwinding support roller of the unwinding station is detected to be descending, the bending roller and winding auxiliary roller of the winding station are controlled to perform a winding position preparation action.

[0006] In one feasible implementation, determining the admission criteria for the finishing mill based on the tracking information of the intermediate billet includes: Obtain the real-time position of the previous strip in front of the first stand of the finishing mill; The real-time location is compared with a first preset location threshold. Based on the comparison results, it is determined whether the access conditions of the finishing mill are met, and when they are met, the timing for uncoiling is determined. The first preset position threshold is determined based on the action signal of the flying shear completing the tail shearing.

[0007] In one feasible implementation, the method further includes: Acquire the winding diameter signal, thermal detection signal, and head and tail tracking information of the intermediate billet from the winding station; The thermal detection signal is subjected to a delay filter of a preset duration; Based on the winding diameter signal, the thermal detection signal after delay filtering, and the head and tail tracking information, determine whether the winding station meets the preset real occupancy conditions. If the winding station does not meet the preset actual occupancy conditions, then the winding station is determined to be in an unoccupied state; When it is determined that the winding station is in an unoccupied state, the process interlock associated with the winding station, which is used to prevent the next intermediate billet from entering, is reset.

[0008] In one feasible implementation, the preset actual occupancy conditions include: The roll diameter value indicated by the roll diameter signal is greater than a preset roll diameter threshold. The thermal detection signal after the aforementioned delay filtering process exists; Based on the head and tail tracking information, it is determined that at least one of the head and tail of the intermediate billet has not moved out of the preset area of ​​the winding station.

[0009] In one feasible implementation, during the step of the control uncoiling station performing the uncoiling and feeding action of the wound intermediate billet, the control position roller is held in a fixed extended position.

[0010] In one feasible implementation, the control uncoiling station performs the uncoiling and feeding action of the wound intermediate billet, including: During the uncoiling process of the intermediate blank that has been wound, when it is detected that the uncoiling receiving roller of the uncoiling station is moving towards the receiving position, the uncoiling support roller is controlled to perform a descent action.

[0011] In one feasible implementation, after determining the permitted unwinding time, the method further includes: Obtain the operator's rhythm intervention instructions; Based on the rhythm intervention command, the timing of uncoiling is adjusted to avoid rear-end collisions between the front and rear strips in the finishing mill.

[0012] Secondly, this application also proposes an electronic device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program stored in the memory to implement the steps of the control method for hot roll box dual-position production as described in any of the first aspects above.

[0013] Thirdly, this application also proposes a computer-readable storage medium storing a computer program thereon, characterized in that, when the computer program is executed by a processor, it implements the steps of the control method for dual-position production of hot roll boxes as described in any of the first aspects above. This application proposes a control method, equipment, and storage medium for dual-station hot-rolled coil production. By establishing a collaborative monitoring mechanism for the working status of the coiling and uncoiling stations, and based on a comprehensive judgment of parallel execution conditions, it can precisely control the timing of the coiling station's preparation for starting the next intermediate billet and the timing of the uncoiling station's execution of the uncoiling and delivery of the already coiled intermediate billet, achieving synchronization or overlap. This method fundamentally changes the traditional control mode where coiling and uncoiling operations must be strictly executed sequentially, successfully activating the inherent dual-station production capacity of the hot-rolled coil equipment. Its most significant benefit lies in effectively eliminating the passive waiting time of the intermediate billet after rough rolling and the delay before uncoiling and delivery, significantly reducing the rolling interval time between the two steel pieces, thereby comprehensively improving the production rhythm and capacity level of the hot-rolling production line, and solving the key bottleneck problem that has long restricted the improvement of production line efficiency.

[0014] This application discloses a control method, equipment, and storage medium for dual-position production of hot roll boxes. Other advantages, objectives, and features of this application will be partly apparent from the following description and partly understood by those skilled in the art through study and practice of this application. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit this specification. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A flowchart illustrating a control method for two-station hot roll production provided in an embodiment of this application; Figure 2 A schematic diagram illustrating the optimization of hot roll box unwinding triggering before and after an embodiment of this application; Figure 3 A graph illustrating the variation of the intermediate roll diameter is provided for an embodiment of this application; Figure 4 A graph showing the actual position and reference position of a position roller provided in an embodiment of this application; Figure 5 A timing diagram showing the change in intermediate roll diameter is provided for an embodiment of this application; Figure 6 A timing diagram of unwinding and rewinding roller position command and response is provided for embodiments of this application; Figure 7 A timing diagram of the position command and response of a first unwinding support roller provided in an embodiment of this application; Figure 8 A timing diagram of the position command and response of a take-up auxiliary roller provided in an embodiment of this application; Figure 9 A functional module diagram of a control system for dual-position hot roll production provided in an embodiment of this application; Figure 10 This is a schematic diagram of the structure of a control device for dual-position hot roll production provided in an embodiment of this application. Detailed Implementation

[0016] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0017] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0018] Please see Figure 1 This is a flowchart illustrating a control method for dual-station production in a hot roll box, provided in an embodiment of this application. Specifically, it may include: S110. Obtain the current working status signal of the hot rolling box and the tracking information of the intermediate billet.

[0019] Specifically, the operating status signals cover equipment operation data such as the position of the uncoiling support rollers at the uncoiler station, the operation status of the bending rollers at the coiling station, and the coil diameter; the intermediate billet tracking information includes the head and tail positions of the intermediate billet, the transmission speed, and its real-time position in the rolling line. This allows the control system to have a comprehensive grasp of the dynamics of the production site, providing accurate data support for subsequent decision-making and avoiding coordination errors caused by missing information.

[0020] S120. Based on the current working status signal, determine the working stage of the hot roll box.

[0021] Specifically, the hot roll box mainly consists of core working stages such as unwinding and feeding, winding completion, and winding preparation. The control system analyzes the current working status signals obtained in step S110, such as whether the unwinding support roller has descended and whether the winding station has completed the roll diameter detection, to accurately determine which stage it is currently in. This ensures that subsequent action commands are issued at the correct time, avoiding conflicts between actions in different stages.

[0022] S130. When the working stage is that the uncoiling station is performing the uncoiling and feeding action, the parallel control winding station starts the winding preparation action for the next intermediate billet.

[0023] Specifically, in traditional control logic, the coiling station must wait for the uncoiling station to complete the uncoiling operation before it can start preparing for the next intermediate billet, resulting in a significant waste of time. However, step S130 enables parallel operation of "uncoiling while preparing for coiling". When the uncoiling station sends the coiled intermediate billet to the finishing mill, the coiling station simultaneously performs preparatory actions such as adjusting the bending rolls and positioning the coiling auxiliary rolls, fundamentally shortening the rolling interval time.

[0024] S140. When the working stage is when the coiling station completes the coiling of the current intermediate billet, the access conditions of the finishing mill are determined based on the tracking information of the intermediate billet.

[0025] S150. Based on the access conditions of the finishing mill, control the uncoiling station to perform the uncoiling and feeding action of the already coiled intermediate billet.

[0026] Specifically, after coiling is completed, the control system uses the intermediate billet tracking information to determine the position of the previous strip in the finishing mill, and determines whether the current intermediate billet can enter the finishing mill to avoid the risk of tail-end collision. At the same time, it precisely controls the uncoiler station to start uncoiling to ensure that the intermediate billet can enter the next process in a timely and safe manner.

[0027] For example, taking a hot-rolling production line in a steel plant as an example, in the traditional single-coil production mode, when the hot-rolled coiling station sends the intermediate billet to the finishing mill, the coiling station must wait for the uncoiling action to be completely completed before it can prepare to receive the next intermediate billet, resulting in a rolling interval of 12 to 20 seconds. With the control method of this application, when the uncoiling support roller of the uncoiling station begins to descend to perform the uncoiling and feeding action, the control system obtains the working status signal through sensors, immediately determines that it is currently in the "uncoiling and feeding stage," and then controls the bending roller of the coiling station to start its action and the coiling auxiliary roller to adjust to the preset position in parallel, preparing to receive the next intermediate billet. After the coiling station completes the coiling of the current intermediate billet, the control system obtains the real-time position of the previous strip steel in front of the F1 stand of the finishing mill through the intermediate billet tracking system, determines that the finishing mill access conditions have been met, and then controls the uncoiling station to start the uncoiling and feeding action of the coiled intermediate billet. Throughout the process, the uncoiling and coiling actions are carried out in parallel and in tandem, completely breaking the timing limitations of traditional single-coil production.

[0028] In some examples, the parallel control winding station initiates the winding preparation action for the next intermediate blank, including: When the unwinding support roller of the unwinding station is detected to be descending, the bending roller and winding auxiliary roller of the winding station are controlled to perform the winding position preparation action.

[0029] Specifically, the descent of the uncoiling support roller (i.e., roller 1A) marks the starting point of the uncoiling feed action. At this point, the uncoiling station has entered a stable uncoiling process, and the winding station's winding preparation action will not conflict with the uncoiling action. The core of the winding preparation action is to control the bending roller and winding auxiliary roller (i.e., roller 1B) of the winding station to perform winding position preparation. The bending roller guides the intermediate billet to form a coil, while the winding auxiliary roller is used for auxiliary support and positioning. Both work together to adjust to the preset winding position to ensure that the next intermediate billet can smoothly enter the winding station and complete winding. In traditional control logic, the winding station must wait for the uncoiling support roller to descend to the 0 position before it can start the bending roller and winding auxiliary roller. However, in this embodiment, the start time is advanced to when the uncoiling support roller begins to descend, realizing parallel coordination of actions and further shortening the preparation time.

[0030] In the actual production process of a certain production line, when the hot coil box uncoiling station begins the uncoiling and feeding action, the uncoiling support roll (roll 1A) begins to descend from its highest position. After the control system detects the descent signal of roll 1A through the displacement sensor, it no longer waits for it to descend to the 0 position, but immediately sends a control command to the coiling station to initiate the coiling position preparation actions of the bending roll and the coiling auxiliary roll (roll 1B). The bending roll begins to adjust according to the preset speed and amplitude, and the coiling auxiliary roll moves synchronously to the preset position for auxiliary coiling. While the uncoiling support roll continues to descend to complete the uncoiling and feeding action, the bending roll and roll 1B have completed the coiling position preparation. When the next intermediate billet is transferred from the R2 mill to the coiling station, the coiling action can be started immediately without waiting for the equipment to prepare, completely solving the problem of steel placement waiting caused by the lag in the bending roll action in the traditional mode. By advancing the start time of the coiling preparation action, the preparation time of the bending roll and the coiling auxiliary roll is significantly shortened. Practical application has verified that it can reduce the waiting time for the last pass of the R2 rolling mill by about 12 seconds, which significantly improves the rolling rhythm.

[0031] In some examples, entry criteria for the finishing mill are determined based on intermediate billet tracking information, including: Obtain the real-time position of the previous strip in front of the first stand of the finishing mill; Compare the real-time location with a first preset location threshold; Based on the comparison results, it is determined whether the access conditions of the finishing mill are met, and when they are met, the timing for uncoiling is determined. The first preset position threshold is determined based on the action signal of the flying shear completing the tail shearing.

[0032] Specifically, by accurately monitoring the position of the previous strip steel and combining it with preset thresholds to determine the entry conditions of the finishing mill, the timing of uncoiling is determined, ensuring the safety and orderliness of dual-station production.

[0033] As a key piece of equipment in the hot rolling production line, the spacing between the front and rear strips of the finishing mill directly affects production safety; if the spacing is too close, rear-end collisions are likely to occur. Figure 2 As shown, in traditional control logic, the finishing mill access condition is that the tail of the previous strip is 2 meters away from F1. This condition is too strict, resulting in a long waiting time for uncoiling after the next strip is coiled. In this embodiment, the real-time position of the previous strip in front of the first stand (F1) of the finishing mill is obtained through the intermediate billet tracking system. This position is compared with a first preset position threshold determined based on the signal of the flying shear completing the tail shearing action. The completion of the tail shearing by the flying shear means that the previous strip has formed a stable tail shape. At this time, it is not necessary to wait for it to leave 2 meters before F1 to determine that the finishing mill access condition is met, thus determining the uncoiling permission time in advance. This optimization ensures sufficient safety interval between the front and rear strips and significantly shortens the uncoiling waiting time, achieving a balance between efficiency and safety.

[0034] During production on a certain production line, after the coiling station completes the coiling of the current intermediate slab, the control system obtains the real-time position information of the previous strip in front of the F1 stand through the intermediate slab tracking system. Simultaneously, the system monitors the operation status of the flying shear. When the flying shear completes the tail shearing of the previous strip, it sends an action completion signal to the control system, which then determines a first preset position threshold (without waiting for the strip tail to leave the F1 stand by 2 meters). Subsequently, the control system compares the real-time position of the previous strip with this preset position threshold. If it determines that the finishing mill access conditions are met, it determines the permissible timing for uncoiling the current intermediate slab. For example, if the tail of the previous strip has just been sheared by the flying shear, and its position in front of the F1 stand is still near the F1 entrance, but because the flying shear has completed the shearing and the tail shape is stable, the control system determines that the access conditions are met and immediately allows the uncoiling station to start the uncoiling and delivery action of the current intermediate slab, starting the uncoiling 5-8 seconds earlier than the traditional mode. By determining the preset position threshold based on the completion of the flying shear's tail shearing, compared to the traditional condition of "2 meters before leaving F1," the uncoiling permission time is significantly advanced, the uncoiling waiting time is shortened, and the rolling rhythm is significantly improved. Furthermore, by acquiring the strip position in real time and comparing it with the preset threshold, the accuracy of the finishing mill access condition determination is ensured, effectively preventing rear-end collisions between strips within the finishing mill and guaranteeing production safety.

[0035] In some examples, the method also includes: Acquire the winding diameter signal, thermal detection signal, and head and tail tracking information of the intermediate billet from the winding station; The thermal detection signal is subjected to a preset duration of delay filtering. Based on the roll diameter signal, the thermal detection signal after delay filtering, and the head and tail tracking information, determine whether the winding station meets the preset real occupancy conditions. If the winding station does not meet the preset actual occupancy conditions, the winding station is determined to be in an unoccupied state; When it is determined that the winding station is in an unoccupied state, the process interlock associated with the winding station, which is used to prevent the next intermediate billet from entering, is reset.

[0036] Specifically, in the hot rolling process, after the coiling station of the hot coil box completes the coiling of an intermediate billet, the intermediate coil is removed by the equipment of the coiling station (such as the No. 1 cradle roll) to make room for receiving the next intermediate billet. The control system relies on a series of sensor signals to determine whether the coiling station is "occupied," one of the key ones being the thermal detection signal (such as the No. 3 thermal detector). This thermal detector is used to detect whether there are high-temperature objects in the coiling station area. In the traditional control logic, the occupancy status of the coiling station is determined only by the No. 3 thermal detector signal. When the iron oxide scale on the surface of the intermediate coil falls off and floats in the No. 3 thermal detector window, it will trigger the thermal detector signal. The program will mistakenly judge that the coiling station is occupied (the "No. 1 CR OCC" signal, which means No. 1 Cradle Occupied (No. 1 cradle roll occupied) is valid, and there is an internal chain signal indicating "the coiling station is occupied and entry is prohibited"), thus locking the coiling station and preventing the next intermediate billet from entering, causing the steel to wobble.

[0037] This embodiment constructs a more comprehensive and accurate occupancy determination mechanism by integrating three dimensions of signals: coil diameter signal, filtered thermal detection signal, and intermediate billet head and tail tracking information. First, the coil diameter signal from the coiling station is acquired, obtained from the coiling station's measuring device, which indicates the diameter of the steel coil on the current coil shaft in real time (reflecting whether an intermediate billet has been actually coiled). Then, the thermal detection signal comes from the hot metal detector in the coiling station area (detecting whether there are any obstructions), and the intermediate billet head and tail tracking information originates from the production line's material tracking system, which can calculate and report the precise position of the head and tail of each intermediate billet on the production line in real time (reflecting whether the intermediate billet is actually in the coiling station).

[0038] Then, the system performs a preset duration (e.g., 200 milliseconds) delay filtering on the original thermal detection signal. This processing can effectively filter out instantaneous signal pulses with a duration shorter than the preset duration caused by factors such as passing iron oxide scale, retaining only stable and continuous thermal detection signals, thereby greatly reducing the probability of misjudgment caused by transient interference.

[0039] Finally, based on the comprehensive judgment of the signals from the three dimensions, it is determined whether the winding station is actually occupied. If the actual occupancy condition is not met, it is determined to be in an unoccupied state, and the relevant process interlocks are reset to allow the next intermediate billet to enter.

[0040] During the production process of a certain production line, when the intermediate coil is transported from the coiling station to the uncoiling station, the iron oxide scale on its surface may fall off and land on the No. 3 thermal inspection window of the coiling station, causing the No. 3 thermal inspection sensor to trigger a thermal inspection signal. In the traditional control logic, this signal would be directly judged as the coiling station being occupied, triggering a process interlock and prohibiting the next intermediate billet from entering the coiling station, resulting in the fifth pass of R2 steel being tilted. In this embodiment, the control system first acquires the coil diameter signal of the coiling station (at which point the coil diameter is less than the preset threshold), the No. 3 hot detection signal, and the intermediate billet head and tail tracking information (at which point the head and tail of the intermediate billet have moved out of the preset area of ​​the coiling station); then, the No. 3 hot detection signal is subjected to a 200ms delay filtering process to eliminate the instantaneous false signal caused by iron oxide scale obstruction; next, the signals from the three dimensions are combined for judgment: the coil diameter signal indicates that the coil diameter value is less than the preset threshold, the hot detection signal after delay filtering has no effective triggering, and the head and tail of the intermediate billet have moved out of the preset area of ​​the coiling station, so it is determined that the coiling station does not meet the actual occupancy conditions and is in the unoccupancy state; finally, the control system automatically resets the process interlock that prohibits the next intermediate billet from entering, allowing the next intermediate billet to enter the coiling station smoothly, avoiding waiting for the steel to be placed.

[0041] In summary, the multi-signal fusion judgment mechanism significantly improves the accuracy of coiling station occupancy status determination compared to traditional single thermal detection signal determination, completely resolving the problem of false occupancy caused by impurities such as iron oxide scale. Furthermore, delay filtering of the thermal detection signal effectively eliminates the influence of instantaneous erroneous signals, further enhancing the reliability of the judgment results. Simultaneously, automatic reset of the process interlock avoids waiting time for steel placement due to false occupancy, reducing the waiting time for the last pass of the R2 mill, and improving rolling rhythm and production efficiency. The entire judgment process is automated, requiring no manual intervention, reducing the labor intensity of operators and avoiding production problems caused by human error. This further protects the stability of equipment operation, reduces frequent equipment start-ups and shutdowns due to false triggering of process interlocks, and extends equipment lifespan.

[0042] In some examples, the preset actual occupancy conditions include: The roll diameter value indicated by the roll diameter signal is greater than the preset roll diameter threshold; There is a thermal detection signal after delay filtering; Based on head and tail tracking information, at least one of the head and tail sections of the intermediate billet is identified as not having moved out of the preset area of ​​the winding station.

[0043] Specifically, the actual occupancy of the winding station means that there is an actual intermediate blank being wound or waiting within the winding station. Therefore, it needs to be defined from three core dimensions: "whether there is an intermediate blank actually being wound," "whether there is an object actually present," and "whether the intermediate blank is actually within the winding station area." The first condition, "the winding diameter value indicated by the winding diameter signal is greater than a preset winding diameter threshold (e.g., 600 mm)," is used to determine whether there is an intermediate blank actually being wound at the winding station. If the winding diameter is greater than the threshold, it means that there is an intermediate blank that has been wound or is being wound; otherwise, there is not. The second condition, "the existence of a thermal detection signal after delay filtering," is used to determine whether there is an object (intermediate blank or other debris) within the winding station. However, after delay filtering, instantaneous false signals can be eliminated to ensure the validity of the signal. The third condition, "based on head and tail tracking information, determining that at least one of the head and tail of the intermediate blank has not moved out of the preset area of ​​the winding station," is used to determine whether the intermediate blank is actually within the effective area of ​​the winding station. If at least one of the head and tail has not moved out, it means that the intermediate blank is still in the winding station; otherwise, it has left. All three conditions must be met simultaneously to determine that the coiling station is actually occupied; none of them can be omitted, thus ensuring the rigor of the determination result.

[0044] Taking the hot-rolling station of a production line as an example, the preset roll diameter threshold is 600mm, and the preset area of ​​the winding station is the entire effective working area from the winding inlet to the winding outlet. When the intermediate billet enters the winding station and begins winding, the roll diameter gradually increases. When the roll diameter reaches 700mm (greater than the preset threshold of 600mm), the roll diameter signal meets the condition. At the same time, the intermediate billet blocks the No. 3 thermal detection sensor, generating a thermal detection signal. After a 200ms delay and filtering process, the signal still exists, satisfying the second condition. The intermediate billet head-tail tracking system detects that the head of the intermediate billet has entered the preset area of ​​the winding station, while the tail has not yet entered, meaning that at least the head has not moved out of the preset area, satisfying the third condition. At this time, the control system determines that the winding station is in a truly occupied state, and the relevant process interlocks are activated to prevent the next intermediate billet from entering, thus avoiding action conflicts. When the intermediate billet is wound up and transported to the unwinding station, the roll diameter is reduced to 300mm (less than the preset threshold of 600mm), the thermal detection signal disappears after filtering, and both the head and tail have been moved out of the preset area of ​​the winding station. Since none of the three conditions are met, it is determined that the winding station is released from occupancy.

[0045] In some examples, during the step of controlling the uncoiling station to perform the uncoiling and feeding action of the intermediate billet, the control position roller is kept in a fixed extended position.

[0046] Specifically, during the uncoiling process in the hot coil box, the position roller's function is to mechanically limit and block the axial position of the intermediate coil on one side of the uncoiling station, preventing it from getting too close to other equipment in the uncoiling station. In the original control logic, the position roller was not fixed but designed to be dynamically adjusted based on the diameter change of the intermediate coil and the uncoiling progress, driven by hydraulics and relying on feedback from a position sensor (such as a Magnetostrictive Displacement Sensor, MTS). However, because the hydraulic cylinder and sensor are installed extremely close to the high-temperature intermediate blank, they are constantly exposed to a high-heat radiation environment, causing the position sensor's measurement signal to drift or fail due to high-temperature interference. This leads to problems such as abnormal position roller movement and loss of positioning signals, which not only increases the failure rate of the uncoiling process but also prolongs equipment preparation time due to waiting for repeated adjustments and confirmations of the position roller.

[0047] This embodiment eliminates the control logic for dynamically adjusting the position roller based on process variables, instead setting its control to a fixed mechanical position. Specifically, throughout the entire process of controlling the uncoiling station to unwind and feed the already wound intermediate roll, the system no longer sends follow-up adjustment commands to the position roller. Instead, it continuously outputs a constant control signal, driving the position roller's hydraulic cylinder to stably maintain a pre-set, fully extended mechanical position. This "fixed extended position" is determined after spatial position matching calculations with adjacent equipment such as the pinch rollers, ensuring that the position roller provides effective axial resistance throughout the entire diameter range of the intermediate roll unwinding without requiring real-time tracking and adjustment.

[0048] like Figure 3 and Figure 4 As shown in the position roller control curve, during the approximately two and a half minute unwinding and winding process, both curves representing the actual position (PORS_act) and reference position (PORS_ref) of the position roller remained a stable straight line, consistently maintaining an extension position of approximately 0.4 meters. This intuitively demonstrates that the optimized position roller no longer fluctuates with the actual position. Figure 3 The system operates in response to changes in the intermediate roll diameter (C_Diam, U_Diam). This optimization eliminates the reliance on fragile sensors, transforming complex closed-loop dynamic control into simple open-loop position holding, significantly improving system reliability. By eliminating unnecessary reciprocating motion of the position roller and the resulting timing delays, the time required for the entire system to reset to standby mode after unwinding is effectively shortened, creating conditions for rapid startup of the next production cycle.

[0049] In some examples, controlling the uncoiling station to perform the uncoiling and feeding action of the wound intermediate billet includes: During the uncoiling process of the intermediate billet, when the uncoiling receiving roller of the uncoiling station is detected to move towards the receiving position, the uncoiling support roller is controlled to perform a lowering action.

[0050] Specifically, during the uncoiling and delivery of the pre-coiled intermediate billet at the hot coil box uncoiling station, the timing of the actions of multiple roller systems directly determines the compactness and efficiency of the workflow. This embodiment has made key optimizations to the descent timing of the first uncoiling support roller (1A roller), and its control logic and effects can be achieved through… Figures 5 to 8 The four sets of time series curves are presented in a complete and continuous manner.

[0051] First, such as Figure 5 As shown, the curves (C_Diam and U_Diam) reflect the diameter change of the intermediate roll during the unwinding process, providing the process background for the entire timing analysis. It indicates that a complete unwinding operation is underway within the indicated time period, establishing a clear time reference and operating context for the analysis of subsequent roll system actions.

[0052] Secondly, such as Figure 6 As shown, the curves (CR2L S_ref and CR2L S_act) reveal the triggering benchmark for this optimization. The rising edge of the CR2L S_ref curve indicates that the control system has issued a "start moving towards the contact position" command to the unwinding and rewinding roll (2L roll). The logic before optimization required waiting for the CR2L S_act (actual position) curve to follow this command and complete the entire rising process (i.e., move into position). The core of this embodiment is to use the moment this command is issued itself as the key trigger point.

[0053] Immediately afterwards, such as Figure 7 As shown, the curves (CR1A S_ref and CR1A S_act) directly reflect the optimized core control response. Almost simultaneously with the rise of the CR2L S_ref curve, the CR1A S_ref curve immediately begins to fall from its high position. This close coupling of the starting points of these two command curves intuitively demonstrates the technical feature of "controlling the unwinding support roller to perform a descent action when the movement of the unwinding and receiving roller towards the receiving position is detected." The descent command of the first unwinding support roller no longer waits for the actual mechanical movement of the unwinding and receiving roller to reach its position, but is issued synchronously with the latter's start-up process, thus advancing the start-up of the 1A roller's action by approximately 5 seconds.

[0054] Finally, as Figure 8As shown, curves (CR1B S_ref and CR1B S_act) demonstrate the synergistic effect resulting from the optimization. Simultaneously or subsequently, the take-up auxiliary roll (1B roll) also begins its movement according to the optimized timing. The four sets of curves together depict a completely new, highly parallel sequence of actions: with the command to begin moving the unwinding and take-up rolls as the unified trigger point, the descent of the first unwinding support roll and the corresponding movement of the take-up auxiliary roll are initiated in advance. Compared to the original serial logic, the actions of each roll system achieve significant overlap on the time axis.

[0055] therefore, Figures 5 to 8 The four sets of timing curves fully confirm the timing optimization of this embodiment. By using the early event of "detecting the start of movement of the unwinding and rewinding rollers" as the core triggering condition, the system significantly advances the descent action of the first unwinding support roller and drives the compact arrangement of related roller actions, eliminating the idle intervals in the original process. This provides key technical support for shortening the total unwinding and feeding time and achieving efficient two-position production.

[0056] In the unwinding process of a hot coil box on a certain production line, under the traditional control mode, the unwinding and receiving roller (2L roller) moves from the initial position to the receiving position. Only after reaching the receiving position and completing the receiving, does the unwinding support roller (1A roller) begin to descend from its highest position. The entire process is time-consuming, resulting in a slow unwinding rhythm. In this embodiment, when the control system issues an unwinding command and the unwinding and receiving roller (2L roller) begins to move towards the receiving position, the control system detects this movement signal through a displacement sensor and immediately initiates the descent of the unwinding support roller (1A roller). During the movement of the unwinding and receiving roller to the receiving position, the unwinding support roller descends synchronously. When the unwinding and receiving roller reaches the receiving position and is ready to complete the receiving, the unwinding support roller has already descended to the preset position, without affecting the receiving action. For example, if it takes 5 seconds for the unwinding and receiving roller to move to the receiving position, under the traditional mode, the unwinding support roller needs another 5 seconds to descend to its position, for a total time of 10 seconds. After optimization, both are performed in parallel, with a total time of only 5 seconds, significantly shortening the unwinding action time.

[0057] In some examples, after determining when opening the book is permitted, the following is also included: Obtain the operator's rhythm intervention instructions; Based on the rhythm intervention command, the timing of uncoiling is adjusted to avoid rear-end collisions between the front and rear strips in the finishing mill.

[0058] Specifically, different strip steel specifications and different production conditions (such as equipment operating status and raw material quality) may cause slight deviations in the automatically determined uncoiling timing. Automatic control alone may not be able to completely avoid the risk of collisions. This embodiment allows operators to issue rhythm intervention commands through the control panel to adjust the automatically determined uncoiling timing based on actual site conditions. Operators can judge whether the interval between the preceding and following strip steel is reasonable based on their own production experience and on-site observation. If they believe the automatically determined uncoiling timing is too early, potentially leading to a collision, they can issue a command to delay uncoiling; if they believe the uncoiling timing is too late, affecting the production rhythm, they can issue a command to advance uncoiling. The control system receives and executes this intervention command, dynamically adjusting the uncoiling timing to ensure that the risk of collisions is avoided under any operating condition, while also considering production efficiency.

[0059] During the production of strip steel of different specifications on a certain production line, when producing thicker and harder strip steel, its transmission speed in the finishing mill is relatively slow. If the uncoiling is started according to the automatically determined uncoiling time, the interval between the preceding and following strips may be too close, posing a risk of collision. In this case, the operator observes the transmission status of the preceding strip steel in the finishing mill through the on-site monitoring system and determines that the automatic uncoiling time is too early. Therefore, the operator issues a rhythm intervention command to delay the uncoiling by 5 seconds via the control panel. Upon receiving this command, the control system immediately adjusts the uncoiling time, delaying the uncoiling action by 5 seconds from the automatically determined time to ensure sufficient safe spacing between the preceding and following strips. When producing thinner strip steel with a faster transmission speed, the operator observes that the preceding strip steel has already passed through the finishing mill quickly, and the automatically determined uncoiling time is too late. Therefore, the operator issues a command to advance the uncoiling time by 3 seconds. The control system then adjusts the uncoiling time, starting the uncoiling earlier to avoid the intermediate billet waiting at the coiling station and improve the production rhythm.

[0060] Furthermore, this application also proposes a control system for two-position hot roll box production, used to execute an embodiment of any of the above-mentioned control methods for two-position hot roll box production, specifically as follows: Figure 9 The diagram shown is a functional module schematic of a control system for dual-station hot roll production proposed in this application. The system includes: The data acquisition unit 21 is used to acquire the current working status signal of the hot roll box and the tracking information of the intermediate billet; Data processing unit 22 is used to determine the working stage of the hot roll box based on the current working status signal; The first control unit 23 is used to control the winding station to start the winding preparation action for the next intermediate billet in parallel when the working stage is when the unwinding station is performing the unwinding and feeding action. The second control unit 24 is used to determine the access conditions of the finishing mill based on the tracking information of the intermediate billet when the working stage is when the coiling station completes the coiling of the current intermediate billet; The third control unit 25 is used to control the uncoiling station to perform the uncoiling and feeding action of the coiled intermediate billet based on the access conditions of the finishing mill.

[0061] It should be noted that the above embodiments are merely best examples and are not intended to limit the implementation of this application.

[0062] Furthermore, such as Figure 10 As shown, this application embodiment also provides an electronic device 300, including a processor 310, a memory 320, and a computer program 321 stored in the memory 320 and executable on the processor. When the processor 310 executes the computer program 321, it implements the steps of the control method for dual-position production of any of the above-mentioned hot roll boxes.

[0063] Since the electronic device described in this embodiment is the device used to implement the control method for dual-position production of hot roll box in the embodiments of this application, those skilled in the art can understand the specific implementation method and various variations of the electronic device in this embodiment based on the method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any device used by those skilled in the art to implement the method in the embodiments of this application falls within the scope of protection of this application.

[0064] In practical implementation, when the computer program 321 is executed by the processor, it can achieve the following: Figure 1 Any of the corresponding implementation methods in the embodiments.

[0065] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0066] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-readable program code.

[0067] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0068] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0069] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0070] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to execute a control method for hot roll box dual-position production.

[0071] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0072] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0073] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms.

[0074] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0075] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0076] 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 of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0077] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0078] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0079] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A control method for dual-station production in a hot roll box, characterized in that, include: Acquire the current operating status signal of the hot roll box and the tracking information of the intermediate billet; Based on the current working status signal, the working stage of the hot roll box is determined; When the working stage is when the uncoiling station is performing the uncoiling and feeding action, the parallel control winding station starts the winding preparation action for the next intermediate billet; When the working stage is when the coiling station completes the coiling of the current intermediate billet, the access conditions of the finishing mill are determined based on the tracking information of the intermediate billet. Based on the access conditions of the finishing mill, the uncoiling station is controlled to perform the uncoiling and feeding action of the already coiled intermediate billet.

2. The method according to claim 1, characterized in that, The parallel control winding station initiates the winding preparation action for the next intermediate blank, including: When the unwinding support roller of the unwinding station is detected to be descending, the bending roller and winding auxiliary roller of the winding station are controlled to perform a winding position preparation action.

3. The method according to claim 1, characterized in that, The determination of the entry criteria for the finishing mill based on the tracking information of the intermediate billet includes: Obtain the real-time position of the previous strip in front of the first stand of the finishing mill; The real-time location is compared with a first preset location threshold. Based on the comparison results, it is determined whether the access conditions of the finishing mill are met, and when they are met, the timing for uncoiling is determined. The first preset position threshold is determined based on the action signal of the flying shear completing the tail shearing.

4. The method according to claim 1, characterized in that, The method further includes: Acquire the winding diameter signal, thermal detection signal, and head and tail tracking information of the intermediate billet from the winding station; The thermal detection signal is subjected to a delay filter of a preset duration; Based on the winding diameter signal, the thermal detection signal after delay filtering, and the head and tail tracking information, determine whether the winding station meets the preset real occupancy conditions. If the winding station does not meet the preset actual occupancy conditions, then the winding station is determined to be in an unoccupied state; When it is determined that the winding station is in an unoccupied state, the process interlock associated with the winding station, which is used to prevent the next intermediate billet from entering, is reset.

5. The method according to claim 4, characterized in that, The preset actual occupancy conditions include: The roll diameter value indicated by the roll diameter signal is greater than a preset roll diameter threshold. The thermal detection signal after the aforementioned delay filtering process exists; Based on the head and tail tracking information, it is determined that at least one of the head and tail of the intermediate billet has not moved out of the preset area of ​​the winding station.

6. The method according to claim 1, characterized in that, In the step of the control uncoiling station performing the uncoiling and feeding action of the intermediate blank, the control position roller is kept in a fixed extended position.

7. The method according to claim 1, characterized in that, The control uncoiling station performs the uncoiling and feeding action of the wound intermediate billet, including: During the uncoiling process of the intermediate blank that has been wound, when it is detected that the uncoiling receiving roller of the uncoiling station is moving towards the receiving position, the uncoiling support roller is controlled to perform a descent action.

8. The method according to claim 3, characterized in that, After determining the permitted timing for unwinding, the following is also included: Obtain the operator's rhythm intervention instructions; Based on the rhythm intervention command, the timing of uncoiling is adjusted to avoid rear-end collisions between the front and rear strips in the finishing mill.

9. An electronic device, comprising: The memory and processor are characterized in that the processor is used to execute a computer program stored in the memory to implement the steps of the control method for dual-position production of hot roll boxes as described in any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the control method for dual-position production of hot roll boxes as described in any one of claims 1 to 7.

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