A control method and system for the side guide plate of a hot rolling coiler

Abstract

This invention discloses a method and system for controlling side guide plates of a hot-rolled coiler, relating to the field of thin material handling technology. The main steps include: acquiring an entry signal of the strip head entering the double-sided side guide plates; after the strip head enters a preset position on the double-sided side guide plates; guiding the strip movement by opposing movement of the double-sided side guide plates in a position-controlled manner; after each side guide plate has moved a preset distance, controlling the double-sided side guide plates to guide the strip movement by using position control on one side and pressure control on the other side; after the pressure value of either side guide plate reaches a target value; comparing the actual pressure value of the position-controlled side guide plate with the given pressure value range of the pressure-controlled side guide plate; and adjusting the given pressure value of the pressure-controlled side guide plate based on the comparison result and the actual pressure value of the position-controlled side guide plate. This invention significantly improves the coil shape quality by adjusting the given value of the pressure control side in real time.

Description

Technical Field

[0001] This invention relates to the field of thin material handling technology, and specifically to a control method and system for the side guide plate of a hot rolling coiler. Background Technology

[0002] In existing technologies, the control of side guide plates in hot rolling coilers mainly employs two methods: pressure control and position control. During the coiling process, relying solely on bilateral position control, due to the fixed position of the side guide plates, makes dynamic adjustment based on the actual position of the strip edge impossible. This can easily lead to poor coil shape, excessive edge pressure, and consequently, edge damage, folding, and other edge quality defects. Traditional pressure control typically combines single-sided pressure control with position control on the other side. The pressure setpoint is pre-calculated based on parameters such as strip thickness, width, strength, and temperature, and remains constant throughout the coiling process. However, in actual production, variations in strip shape can cause pressure imbalances on both sides of the side guide plates, with one side experiencing excessive pressure while the other has no pressure. This frequently results in strip misalignment, coil stacking, and edge damage.

[0003] Therefore, existing technologies have significant limitations in dealing with complex working conditions, particularly in dynamically adjusting the position and pressure of the side guide plates, making it difficult to meet the demands of high-quality winding. To address these issues, a novel control method capable of dynamically adjusting the pressure and position of the side guide plates is urgently needed to improve winding quality and production efficiency. Summary of the Invention

[0004] To address the problems of existing technologies, this invention proposes a method for controlling the side guide plate of a hot rolling coiler, comprising the following steps:

[0005] S1: Obtain the entry signal of the strip head into the double-sided guide plate, and proceed to the next step after the strip head enters the preset position of the double-sided guide plate:

[0006] S2: The strip steel is guided to move by the opposing movement of the two side guide plates in a position control manner, and the next step is entered after the two side guide plates have moved a preset distance respectively.

[0007] S3: Control the double-sided guide plates to guide the strip steel movement by using position control on one side and pressure control on the other side, and proceed to the next step after the pressure value of either guide plate reaches the target value;

[0008] S4: Compare the actual pressure value of the position control side guide plate with the given pressure value range of the pressure control side guide plate;

[0009] S5: Adjust the given pressure value of the pressure control side guide plate according to the comparison results and the actual pressure value of the position control side guide plate;

[0010] S6: When the tail of the strip enters the preset position of the double-sided guide plate, the strip is guided by the current position of the double-sided guide plate in the position control mode.

[0011] Furthermore, in step S2, the preset distance that each of the two side guide plates moves is less than the distance that the two side guide plates need to move when the strip is guided by position control alone.

[0012] Furthermore, in step S3, the initial given pressure value of the pressure control side of the double-sided guide plate is set according to the current strip steel specification parameters.

[0013] Furthermore, in step S5, the adjustment of the given pressure value is expressed by the following formula:

[0014]

[0015] In the formula, P ref2 To adjust the given pressure value of the pressure control side guide plate after adjustment, P ref1 Given an initial pressure value, P max Given a maximum pressure value, P min Given a lower pressure limit, P act1 The actual pressure value of the position control side guide plate, K1 and K2 are the adjustment ratios used to adjust the given pressure value, and Ra min Ra is the lower bound of the interval comparison. max Ra1 and Ra2 are the upper limit ratios for interval comparison, and the interval ratios for interval comparison are the upper limit ratios for interval comparison.

[0016] Furthermore, following step S6, the following step is also included:

[0017] S7: Obtain the output signal of the double-sided guide plate at the tail of the strip, and the winding task ends.

[0018] This invention also proposes a side guide plate control system for a hot rolling coiler, comprising:

[0019] A hot metal detector is used to acquire the sensing signal of the position of the strip head in the double-sided guide plates;

[0020] Displacement sensors are used to acquire the actual position values ​​of each side guide plate in the double-sided side guide plate and return the actual position signal;

[0021] The control unit receives sensing signals. Upon receiving a sensing signal indicating that the head of the strip has entered a preset position on both side guide plates, it controls the two side guide plates to move in opposite directions to guide the strip movement using position control. After each side guide plate has moved a preset distance, it controls the two side guide plates to guide the strip movement using position control on one side and pressure control on the other. Upon receiving a sensing signal indicating that the tail of the strip has entered a preset position on both side guide plates, it controls the two side guide plates to guide the strip in position control mode at their current positions.

[0022] Pressure sensors are used to collect the actual pressure values ​​of each side guide plate in the dual-sided guide plate and return the pressure signal;

[0023] The control unit is also used to, after receiving a pressure signal that the pressure value of either side guide plate has reached the target value, compare the actual pressure value of the position control side guide plate with the given pressure value range of the pressure control side guide plate, and adjust the given pressure value of the pressure control side guide plate according to the comparison result and the actual pressure value of the position control side guide plate.

[0024] Furthermore, during the opposing movement of the two side guide plates, the preset distance that each side guide plate moves is less than the distance that the two side guide plates need to move when the strip is guided by position control alone.

[0025] Furthermore, the initial given pressure value of the pressure control side in the dual-sided guide plate is set according to the current strip steel specifications.

[0026] Furthermore, the adjustment of a given pressure value is expressed by the following formula:

[0027]

[0028] In the formula, P ref2 To adjust the given pressure value of the pressure control side guide plate after adjustment, P ref1 Given an initial pressure value, P max Given a maximum pressure value, P min Given a lower pressure limit, P act1 The actual pressure value of the position control side guide plate, K1 and K2 are the adjustment ratios used to adjust the given pressure value, and Ra min Ra is the lower bound of the interval comparison. max Ra1 and Ra2 are the upper limit ratios for interval comparison, and the interval ratios for interval comparison are the upper limit ratios for interval comparison.

[0029] Furthermore, after the distance sensor acquires the exit signal of the double-sided guide plates at the tail of the strip, the control unit is also used to control the end of the winding task.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] (1) The hot rolling coiler side guide plate control method and system of the present invention, by adjusting the given value of the pressure control side in real time, keeps the center line of the strip consistent, effectively avoids the problem of the steel coil tower shape caused by the unbalanced pressure of the side guide plate, and significantly improves the coil shape quality of the coil.

[0032] (2) The given pressure value is dynamically adjusted according to the actual position and pressure of the strip, which avoids edge defects such as strip edge damage and folding caused by excessive or insufficient pressure, and improves the surface quality of the product.

[0033] (3) The position and pressure of the side guide plate can be flexibly adjusted according to the changes in the shape of the strip, which is suitable for strip coiling of different specifications and materials, greatly improving the adaptability and stability of the system.

[0034] (4) By optimizing the side guide plate control strategy, the scrap rate caused by poor roll shape or edge damage was reduced, and the time cost of equipment adjustment and maintenance was reduced, thereby improving the overall production efficiency.

[0035] (5) Since the dynamic calculation of the pressure setpoint is based on the actual production conditions, only a few key parameters need to be determined during the debugging process to achieve the ideal control effect, which simplifies the system debugging process. Attached Figure Description

[0036] Figure 1 A flowchart illustrating the steps of a control method for a side guide plate of a hot rolling coiler;

[0037] Figure 2 This is a block diagram of a side guide plate control system for a hot rolling coiler;

[0038] Figure 3 To control the function curve corresponding to the formula. Detailed Implementation

[0039] The technical solution of the present invention will be described in detail below with reference to specific embodiments. It should be noted that these embodiments are only used to further illustrate the content and advantages of the present invention and do not limit the scope of protection of the present invention in any way. In practical applications, the parameters, structures, or method steps in the embodiments can be appropriately adjusted according to specific needs and technical conditions, but all such adjustments should be considered within the scope of the present invention.

[0040] Example 1

[0041] This embodiment provides a side guide plate control method for a hot-rolled coiler, mainly applied to the position and pressure control of the side guide plate during strip coiling. By dynamically adjusting the setpoint of the pressure control side, problems such as poor coil shape and edge damage existing in the prior art are solved, significantly improving coiling quality and production efficiency. The following is a description of the specific implementation steps and key technical details of this method. Figure 1 As shown, the method includes the following steps:

[0042] S1: Obtain the entry signal of the strip head into the double-sided guide plate, and proceed to the next step after the strip head enters the preset position of the double-sided guide plate:

[0043] S2: The strip steel is guided to move by the opposing movement of the two side guide plates in a position control manner, and the next step is entered after the two side guide plates have moved a preset distance respectively.

[0044] S3: Control the double-sided guide plates to guide the strip steel movement by using position control on one side and pressure control on the other side, and proceed to the next step after the pressure value of either guide plate reaches the target value;

[0045] S4: Compare the actual pressure value of the position control side guide plate with the given pressure value range of the pressure control side guide plate;

[0046] S5: Adjust the given pressure value of the pressure control side guide plate according to the comparison results and the actual pressure value of the position control side guide plate;

[0047] S6: When the tail of the strip enters the preset position of the double-sided guide plate, the strip is guided by the current position of the double-sided guide plate in the position control mode.

[0048] In the hot-rolled coiler side guide plate control method, the main task of step S1 is to detect the signal of the strip head entering the double-sided side guide plates and adjust the side guide plates to the initial position to guide the strip smoothly into the coil. To achieve this goal, the system needs to be completed through a series of sophisticated sensors and control systems.

[0049] Before the strip approaches the coiler, hot metal sensors and distance sensors (such as laser rangefinders or photoelectric sensors) installed in the side guide plate area monitor the position of the strip head in real time. These sensors are typically positioned near the entrance of the parallel section of the side guide plate to ensure accurate detection of the strip head's arrival.

[0050] When the sensor detects that the strip head has reached the preset position, it generates a "strip entry signal" and sends the signal to the control system. This preset position is usually located near the entrance of the parallel section of the side guide plate, with a certain safety margin from the actual contact point of the strip to ensure the timeliness and accuracy of the signal.

[0051] Upon receiving the "strip steel entry signal," the control system immediately initiates the subsequent operation procedures to ensure seamless integration of the entire process.

[0052] Upon receiving the strip entry signal, the control system immediately activates the position control mode of the dual-side guide plates. At this time, both side guide plates use position control, moving in opposite directions according to a preset opening width W+δ1. Here, W represents the strip width, and δ1 is a safety margin, typically set to 60 mm. This design aims to prevent the strip head from colliding or being damaged during entry due to the side guide plates being too narrow.

[0053] The opening width setting W+δ1 not only considers the actual width of the strip but also reserves a certain safety margin to cope with slight deviations or other uncertainties that may occur. For example, in some steel mill applications, a typical value of δ1 is 60 mm, which is sufficient to ensure that the strip head can smoothly enter the side guide plate area. To further improve the reliability of the system, the moving speed and acceleration of the double side guide plates can also be further optimized. By optimizing the motion parameters, the impact force when the strip enters can be effectively reduced, thereby reducing the risk of strip surface damage.

[0054] The opposing movement of the dual side guide plates is driven by a hydraulic servo system. Each side guide plate is equipped with an independent hydraulic cylinder to ensure the synchronization of movement on both sides. High-precision displacement sensors are installed inside the hydraulic cylinders to monitor the actual position of the side guide plates in real time and feed the data back to the control system.

[0055] The control system uses a closed-loop control algorithm, combined with data from sensor feedback, to dynamically adjust the pressure and flow rate of the hydraulic cylinder, ensuring that the side guide plates move precisely along a predetermined trajectory. This closed-loop control method not only improves the system's response speed but also significantly enhances control accuracy.

[0056] After entering step S2, the system begins the short-stroke control phase. The core objective of this phase is to rapidly guide the strip steel into the core area of ​​the coiler through the opposing movement of the double-sided guide plates. Specifically:

[0057] When the strip head reaches near the middle of the parallel section of the side guide plate, the system automatically switches to short-stroke control mode. This trigger condition is set based on parameters such as the strip speed, width, and the geometry of the side guide plate to ensure that short-stroke control can be initiated at the appropriate time.

[0058] The starting position for short-stroke control is usually located at a certain distance after the strip head enters the side guide plate area. The specific position can be determined through experimental debugging to achieve the best guiding effect.

[0059] During the short-stroke control phase, the dual side guides continue to move in opposite directions using position control, but the moving distance is less than the total moving distance required when using position control alone. This design aims to reduce resistance during strip entry while quickly guiding the strip into the core area of ​​the coiler.

[0060] The travel distance for short-stroke control is typically set as the strip width W plus a small margin m1, i.e., W + δ1 - m1. For example, in some steel mill applications, a typical value for m1 is 30 mm. This design ensures that the strip can smoothly enter the side guide plate area while avoiding energy waste due to excessive movement.

[0061] To ensure the stability of short-stroke control, the system employs a high-precision synchronous control algorithm to ensure that the movement of the side guide plates remains highly consistent. Even under high-speed operating conditions, it can achieve precise guidance.

[0062] Once both side guides have moved a preset distance, the system determines that the strip has successfully entered the control range of the side guides, thus proceeding to the next stage. This termination condition is set based on parameters such as the strip's speed, width, and the geometry of the side guides, ensuring that short-stroke control can end at an appropriate time.

[0063] Upon entering step S3, the system switches the control mode of the dual-side guide plates from dual-side position control to a combined mode of one-side position control and the other-side pressure control. The core objective of this stage is to ensure the strip remains stable throughout the entire coiling process through dynamic adjustments on the pressure control side.

[0064] The initial set pressure value on the pressure control side is calculated based on the current strip specifications (such as thickness, width, strength, and temperature). These parameters are typically acquired in real time through an online monitoring system to ensure that the initial set pressure value can adapt to the needs of strips of different specifications. It should be noted that different companies use different methods to calculate the initial set pressure value for different strip specifications; therefore, it will not be described in detail here.

[0065] When the pressure value of either side guide plate reaches the target value, the system considers that the side guide plate has made contact with the edge of the strip and is ready to enter the next stage of fine control. This switching condition is set based on real-time feedback data from the pressure sensor to ensure the accuracy of the switching timing.

[0066] Pressure sensors are typically installed in the hydraulic control circuit of the side guide plate's hydraulic cylinder. By calculating the actual pressure on the piston and rod sides of the hydraulic cylinder, the pressure between the side guide plate and the strip is determined, enabling real-time monitoring of the pressure distribution between them. By analyzing the pressure distribution data, the system can accurately determine whether the side guide plate has made contact with the edge of the strip.

[0067] After switching to pressure control mode, the system dynamically adjusts the setpoint on the pressure control side to ensure the strip remains stable throughout the coiling process. This dynamic adjustment mechanism better adapts to changes in strip shape and avoids problems such as poor coiling or edge damage caused by pressure imbalance.

[0068] In step S4, the system compares the actual pressure value of the guide plate on the position control side with the given pressure multiplier range on the pressure control side to achieve dynamic adjustment. The pressure multiplier range is divided into three parts: low multiplier range (0.2 to 0.8 times), medium multiplier range (0.8 to 1.2 times), and high multiplier range (1.2 to 2.0 times) (the multiplier values ​​described here are for illustrative purposes only; the actual values ​​need to be set according to actual requirements). The control strategy for each range is different to meet the needs of different operating conditions.

[0069] For example, when the actual pressure value of the position control side guide plate is less than 0.8 times the calculated target value, the real-time calculated pressure value increases proportionally; when the actual pressure value is less than 0.2 times the calculated target value, it equals the upper limit value.

[0070] Dynamic adjustment methods include two strategies: proportional control and upper / lower limit restrictions. By reasonably setting the proportional control and upper / lower limit values, excessive fluctuations in the setpoint on the pressure control side can be effectively avoided, thereby improving system stability.

[0071] In step S5, based on the comparison results from S4, the system further adjusts the setpoint on the pressure control side. The control formula is as follows (function curve shown). Figure 3 ):

[0072]

[0073] In the formula, P ref2 To adjust the given pressure value of the pressure control side guide plate after adjustment, P ref1 Given an initial pressure value, P max Given a maximum pressure value, P min Given a lower pressure limit, P act1 The actual pressure value of the position control side guide plate, K1 and K2 are the adjustment ratios used to adjust the given pressure value, and Ra min Ra is the lower bound of the interval comparison. max Ra1 and Ra2 are the upper limit ratios for interval comparison, and the interval ratios for interval comparison are the upper limit ratios for interval comparison.

[0074] Using the above formula, the system can precisely adjust the given value on the pressure control side to ensure that the strip remains stable throughout the entire coiling process.

[0075] Finally, when the tail of the strip reaches near the middle of the parallel section of the side guide plate, the system enters step S6. The main purpose of this stage is to ensure that the tail of the strip can smoothly exit the side guide plate area, avoiding poor coiling or other quality problems caused by improper pressure or position control.

[0076] In summary, the hot rolling coiler side guide plate control method and system proposed in this invention, by adjusting the given value of the pressure control side in real time, keeps the center line of the strip consistent, effectively avoids the coil towering problem caused by the unbalanced pressure of the side guide plate, and significantly improves the coiling quality.

[0077] The given pressure value is dynamically adjusted according to the actual position and pressure of the strip, avoiding edge defects such as strip edge damage and folding caused by excessive or insufficient pressure, thus improving the surface quality of the product.

[0078] The position and pressure of the side guide plates can be flexibly adjusted according to the changes in the shape of the strip, making it suitable for coiling strips of different specifications and materials, which greatly improves the adaptability and stability of the system.

[0079] By optimizing the side guide plate control strategy, the scrap rate caused by poor roll shape or edge damage was reduced, while the time cost of equipment adjustment and maintenance was reduced, thereby improving the overall production efficiency.

[0080] Since the dynamic calculation of the pressure setpoint is based on the actual production conditions, only a few key parameters need to be determined during the debugging process to achieve the ideal control effect, which simplifies the system debugging process.

[0081] Example 2

[0082] To better understand the technical content of this invention, this embodiment describes the invention in the form of system modules, such as... Figure 2 As shown, the present invention also proposes a side guide plate control system for a hot rolling coiler, comprising:

[0083] A hot metal detector is used to acquire the sensing signal of the position of the strip head in the double-sided guide plates;

[0084] Displacement sensors are used to acquire the actual position values ​​of each side guide plate in the double-sided side guide plate and return the actual position signal;

[0085] The control unit receives sensing signals. Upon receiving a sensing signal indicating that the head of the strip has entered a preset position on both side guide plates, it controls the two side guide plates to move in opposite directions to guide the strip movement using position control. After each side guide plate has moved a preset distance, it controls the two side guide plates to guide the strip movement using position control on one side and pressure control on the other. Upon receiving a sensing signal indicating that the tail of the strip has entered a preset position on both side guide plates, it controls the two side guide plates to guide the strip in position control mode at their current positions.

[0086] Pressure sensors are used to collect the actual pressure values ​​of each side guide plate in the dual-sided guide plate and return the pressure signal;

[0087] The control unit is also used to, after receiving a pressure signal that the pressure value of either side guide plate has reached the target value, compare the actual pressure value of the position control side guide plate with the given pressure value range of the pressure control side guide plate, and adjust the given pressure value of the pressure control side guide plate according to the comparison result and the actual pressure value of the position control side guide plate.

[0088] Furthermore, during the opposing movement of the two side guide plates, the preset distance that each side guide plate moves is less than the distance that the two side guide plates need to move when the strip is guided by position control alone.

[0089] Furthermore, the initial given pressure value of the pressure control side in the dual-sided guide plate is set according to the current strip steel specifications.

[0090] Furthermore, the adjustment of a given pressure value is expressed by the following formula:

[0091]

[0092] In the formula, P ref2 To adjust the given pressure value of the pressure control side guide plate after adjustment, P ref1 Given an initial pressure value, P max Given a maximum pressure value, P min Given a lower pressure limit, P act1 The actual pressure value of the position control side guide plate, K1 and K2 are the adjustment ratios used to adjust the given pressure value, and Ra min Ra is the lower bound of the interval comparison. max Ra1 and Ra2 are the upper limit ratios for interval comparison, and the interval ratios for interval comparison are the upper limit ratios for interval comparison.

[0093] Furthermore, after the distance sensor acquires the exit signal of the double-sided guide plates at the tail of the strip, the control unit is also used to control the end of the winding task.

[0094] In summary, this invention provides an optimized method and system for controlling the side guide plate of a hot-rolled coiler. By dynamically adjusting the setpoint on the pressure control side, it solves problems such as poor coil shape and edge damage caused by pressure imbalance in existing technologies. This method achieves precise position and pressure control during strip coiling, significantly improving coiling quality and production efficiency. Furthermore, this invention is not only applicable to the control of the side guide plate of a hot-rolled coiler but can also be extended to other similar industrial applications, possessing broad application prospects and significant technical advantages. It should be noted that the above embodiments are merely one specific implementation of this invention, and those skilled in the art can make appropriate adjustments or extensions according to actual needs and technical conditions, but all such adjustments or extensions should be considered within the scope of protection of this invention.

[0095] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0096] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0097] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0098] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A method for controlling the side guide plate of a hot rolling coiler, characterized in that, Including the following steps: S1: Obtain the entry signal of the strip head into the double-sided guide plate, and proceed to the next step after the strip head enters the preset position of the double-sided guide plate; S2: The strip steel is guided to move by the opposing movement of the two side guide plates in a position control manner, and the next step is entered after the two side guide plates have moved a preset distance respectively. S3: Control the double-sided guide plates to guide the strip steel movement by using position control on one side and pressure control on the other side, and proceed to the next step after the pressure value of either guide plate reaches the target value; S4: Compare the actual pressure value of the position control side guide plate with the given pressure value range of the pressure control side guide plate; S5: Adjust the given pressure value of the pressure control side guide plate according to the comparison results and the actual pressure value of the position control side guide plate; the adjustment of the given pressure value in step S5 is expressed by the following formula: ； In the formula, The set pressure value is adjusted to control the pressure on the guide plate. Given an initial pressure value, Given a maximum pressure value, Given a lower pressure limit, The actual pressure value of the position control side guide plate. The control ratio is used to adjust a given pressure value. This is the lower limit ratio for interval comparison. This represents the upper limit of the interval comparison. The interval comparison ratio; S6: When the tail of the strip enters the preset position of the double-sided guide plate, the strip is guided by the current position of the double-sided guide plate in the position control mode.

2. The method for controlling the side guide plate of a hot rolling coiler as described in claim 1, characterized in that, In step S2, the preset distance that each of the two side guide plates moves is less than the distance that the two side guide plates need to move when the strip is guided by position control alone.

3. The method for controlling the side guide plate of a hot rolling coiler as described in claim 1, characterized in that, In step S3, the initial given pressure value of the pressure control side of the double-sided guide plate is set according to the current strip steel specification parameters.

4. The method for controlling the side guide plate of a hot rolling coiler as described in claim 1, characterized in that, Following step S6, the following step is also included: S7: Obtain the output signal of the double-sided guide plate at the tail of the strip, and the winding task ends.

5. A control system for a side guide plate of a hot rolling coiler, characterized in that, include: A hot metal detector is used to acquire the sensing signal of the position of the strip head in the double-sided guide plates; Displacement sensors are used to acquire the actual position values ​​of each side guide plate in the dual-sided guide plates and return the actual position signal; The control unit receives sensing signals. Upon receiving a sensing signal indicating that the head of the strip has entered a preset position on both side guide plates, it controls the two side guide plates to move in opposite directions to guide the strip movement using position control. After each side guide plate has moved a preset distance, it controls the two side guide plates to guide the strip movement using position control on one side and pressure control on the other. Upon receiving a sensing signal indicating that the tail of the strip has entered a preset position on both side guide plates, it controls the two side guide plates to guide the strip in position control mode at their current positions. Pressure sensors are used to collect the actual pressure values ​​of each side guide plate in the dual-sided guide plate and return the pressure signal; The control unit is also used to, after receiving a pressure signal that the pressure value of either side guide plate has reached the target value, compare the actual pressure value of the position control side guide plate with the pressure value multiplier range of the pressure control side guide plate, and adjust the pressure value of the pressure control side guide plate according to the comparison result and the actual pressure value of the position control side guide plate. The control of a given pressure value is expressed by the following formula: ； In the formula, The set pressure value is adjusted to control the pressure on the guide plate. Given an initial pressure value, Given a maximum pressure value, Given a lower pressure limit, The actual pressure value of the position control side guide plate. The control ratio is used to adjust a given pressure value. This is the lower limit ratio for interval comparison. This represents the upper limit of the interval comparison. This represents the interval ratio for interval comparison.

6. The hot rolling coiler side guide plate control system as described in claim 5, characterized in that, During the opposing movement of the two side guide plates, the preset distance that each side guide plate moves is less than the distance that the two side guide plates need to move when the strip is guided by position control alone.

7. A hot-rolling coiler side guide plate control system as described in claim 5, characterized in that, The initial pressure value of the pressure control side of the dual-sided guide plate is set according to the current strip steel specifications.

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