Coiling side guide plate control method and system

Abstract

The invention provides a coiling side guide plate control method and system, and the method comprises the steps: S1, after strip steel enters a side guide plate, the side guide plate executes two times of short-stroke actions, and after the head of the strip steel enters a pinch roll, the side guide plate enters a pressure control mode according to a set pressure; s2, in the pressure control mode, when the total pressure of the two sides exceeds two times or more of the set pressure, the side guide plate locks the current position and exits from the pressure control mode; s3, in the position control mode, when the total pressure is increased, the opening degree of a side guide plate is correspondingly increased, the positions on the two sides are also increased accordingly, and it is ensured that the strip steel is aligned with the rolling center line; and S4, when the side guide plate is kept in the pressure control mode and the tail of the strip steel throws steel from the finishing mill, if the pressure is continuously increased and the position of the side guide plate is opened to the set value of the width of the strip steel, the pressure control mode is quitted, and the current position is locked. The problems of side guide plate steel clamping, staggered layer edge forming and the like caused by a single control mode can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of strip rolling, and specifically, to a control method and system for a coiling side guide plate. Background Art

[0002] The coiling side guide plate is used to guide the strip into the coiler and align the strip with the rolling center line, which directly affects the quality of the coiled strip. At the same time, its poor state will lead to steel jamming, coiling layer misalignment, etc.

[0003] Existing related technologies, such as the invention patent with the publication number CN115740022A, disclose a control method for preventing steel clamping by the coiling side guide plate of hot-rolled thin gauge strips, including side guide plate calibration, calibrating the standard opening and standard side guide plate pressure; real-time monitoring of the side guide plate opening and pressure feedback values, comparing them with the strip width, and adopting a position control mode and a pressure control mode to adjust the opening width of the side guide plate.

[0004] Currently, the control of the coiling side guide plate is position control at the head. After two short strokes, the side guide plate enters pressure control (unilateral) according to pressure or head position; when the strip tail reaches a certain position, the side guide plate exits pressure control and enters position control again, waiting for the next strip. Under this control method, when the strip head has poor shape, such as sickle bend or S bend, the side guide plate (pressure control) will squeeze the strip, resulting in steel jamming, head layer misalignment, etc.; when the strip tail has side bend, the side guide plate (pressure control) will open in advance, resulting in tail edge out, etc. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a control method and system for a coiling side guide plate.

[0006] According to a control method and system for a coiling side guide plate provided by the present invention, the solution is as follows:

[0007] In a first aspect, a control method for a coiling side guide plate is provided, and the method includes:

[0008] Step S1: After the strip enters the side guide plate, the side guide plate performs two short-stroke actions. After the strip head enters the pinch roll, the side guide plate enters the pressure control mode according to the set pressure;

[0009] Step S2: In the pressure control mode, when the total pressure on both sides exceeds twice the set pressure or more, the side guide plate locks the current position and exits the pressure control mode;

[0010] Step S3: In the position control mode, when the total pressure increases, the opening of the side guide plate increases accordingly, and the positions on both sides also increase, ensuring that the strip is aligned with the rolling center line;

[0011] Step S4: When the side guide is in the pressure control mode and the tail of the strip is discharged from the finishing mill, if the pressure continues to increase and the position of the side guide opens to the set value of the strip width, the pressure control mode is exited and the current position is locked.

[0012] Preferably, step S1 includes: after the head of the strip enters the pinch roll, the side guide enters the pressure control mode in advance according to the set pressure threshold to change the head coiling shape, and when the shape of the strip head is defective, the strip is clamped in advance.

[0013] Preferably, step S2 includes: in the pressure control mode, only one side of the side guide enters the pressure control, and the other side maintains the position control;

[0014] When the shape of the strip is defective, the contact with the side guide is close to the non-pressure control side, and the total pressure is used to judge the contact situation between the strip and the side guide. If the total pressure is too large, it is considered that the side guide has clamped the strip, and the current position is locked and the pressure control is exited.

[0015] Preferably, step S3 includes:

[0016] In the position control mode, when the pressure on the pressure control side of the side guide increases, the opening degree increases accordingly, and at the same time, the position control side adjusts synchronously according to the position of the pressure control side to ensure that the strip is aligned with the rolling center line and prevent the strip from deviating to one side.

[0017] Preferably, step S4 includes:

[0018] During the normal control process, the pressure control is exited when the tail of the strip leaves the side guide;

[0019] If the shape of the strip tail is abnormal, it will cause the pressure to increase, and the pressure control side of the side guide continues to open. Before the normal pressure control exit timing, the pressure control is exited in advance when the strip width is opened to the set value according to the side guide position, and the current position is locked.

[0020] In a second aspect, a coiling side guide control system is provided, and the system includes:

[0021] Module M1: After the strip enters the side guide, the side guide performs two short-stroke actions. After the head of the strip enters the pinch roll, the side guide enters the pressure control mode according to the set pressure;

[0022] Module M2: In the pressure control mode, when the total pressure on both sides exceeds twice the set pressure or more, the side guide locks the current position and exits the pressure control mode;

[0023] Module M3: In the position control mode, when the total pressure increases, the opening degree of the side guide increases accordingly, and the positions on both sides also increase, ensuring that the strip is aligned with the rolling center line;

[0024] Module M4: When the side guide is in the pressure control mode and the tail of the strip is discharged from the finishing mill, if the pressure continues to increase and the position of the side guide opens to the set value of the strip width, the pressure control mode is exited and the current position is locked.

[0025] Preferably, the module M1 includes: after the head of the strip enters the pinch roll, the side guide enters the pressure control mode in advance according to the set pressure threshold to change the head coiling shape, and when the shape of the strip head is poor, the strip is clamped in advance.

[0026] Preferably, the module M2 includes: in the pressure control mode, the side guide enters the pressure control only on one side, and the other side maintains the position control;

[0027] When the shape of the strip is poor, the contact with the side guide is close to the non-pressure control side, and the total pressure is used to judge the contact situation between the strip and the side guide. If the total pressure is too large, it is considered that the side guide has clamped the strip, and the current position is locked to exit the pressure control.

[0028] Preferably, the module M3 includes: in the position control mode, when the pressure on the pressure control side of the side guide increases, the opening increases accordingly, and the position control side adjusts synchronously according to the position of the pressure control side to ensure that the strip is aligned with the rolling center line and prevent the strip from deviating to one side.

[0029] Preferably, the module M4 includes: in the normal control process, the pressure control is exited when the tail of the strip leaves the side guide;

[0030] If the shape of the strip tail is abnormal, it will cause the pressure to increase, and the pressure control side of the side guide will continue to open. Before the normal pressure control exit timing, the pressure control is exited in advance when the strip width is opened to the set value according to the side guide position, and the current position is locked.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] Under the original separate position control and pressure control modes of the coiling side guide, the present invention adds corresponding protection controls and adjusts according to the site conditions, avoiding problems such as strip jamming, misalignment, and edge deviation caused by poor strip shape, and reducing operation intervention.

[0033] Other beneficial effects of the present invention will be described in the specific embodiments through the introduction of specific technical features and technical solutions. Those skilled in the art should be able to understand the beneficial technical effects brought by the technical features and technical solutions through these introductions. Brief Description of the Drawings

[0034] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:

[0035] Figure 1 This is a schematic diagram of the overall process of the present invention. Detailed implementation manners

[0036] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all fall within the protection scope of the present invention.

[0037] An embodiment of the present invention provides a coiling side guide control method. For the optimization of side guide control, pressure protection is introduced during position control; position protection is introduced during pressure control to avoid problems such as steel jamming and misaligned edge of the side guide caused by a single control method. Refer to Figure 1 As shown, the method specifically includes:

[0038] Step S1: After the strip enters the side guide, the side guide performs two short-stroke actions (the short-stroke action refers to reducing the fixed opening on one side, generally 35 mm for the first time and 20 mm for the second time, which can be modified on the screen or selected in the program). After the head of the strip enters the pinch roll, the side guide enters the pressure control mode according to the set pressure. After the head of the strip enters the pinch roll, the side guide enters the pressure control mode in advance according to the set pressure threshold to improve the head coiling shape. Especially when the strip head shape is poor (sickle bend or S bend), the impact can be reduced by clamping the strip in advance.

[0039] Step S2: In the pressure control mode, when the total pressure on both sides exceeds twice the set pressure and above, the side guide locks the current position and exits the pressure control mode.

[0040] Specifically, in the pressure control mode, the side guide uses the total pressure as the basis for judging the contact situation between the strip and the side guide. When the total pressure exceeds twice the set pressure and above, it locks the current position and exits the pressure control mode to avoid the strip being blocked from advancing due to insufficient pressure on one side. Among them, the threshold of twice the set pressure and above can be adjusted according to the on-site situation.

[0041] Step S3: In the position control mode, when the total pressure increases, the opening of the side guide increases accordingly, and the positions on both sides also increase (the opening increases by 5 mm according to 30% of the pressure increase amount, which can be adjusted according to the steel type, thickness, and width) to ensure that the strip is aligned with the rolling center line.

[0042] Specifically, in the position control mode of the side guide plate, when the pressure on the pressure control side increases, the opening degree increases accordingly. At the same time, the position control side adjusts synchronously according to the position of the pressure control side to ensure that the strip is aligned with the rolling center line and prevent the strip from deviating to one side.

[0043] Step S4: When the side guide plate remains in the pressure control mode and the tail of the strip is ejected from the finishing mill, if the pressure continues to increase and the position of the side guide plate opens to the strip width + 20 mm, the pressure control mode is exited and the current position is locked.

[0044] Specifically, when the tail of the strip is ejected, if the pressure on the side guide plate continues to increase and the position of the side guide plate opens to the strip width plus 20 mm, the pressure control mode is exited in advance and the current position is locked to improve the coiling control of the strip tail.

[0045] Among them, when the tail of the strip is ejected, the adjustment amount of the opening position (strip width + 20 mm) can be adjusted according to the on-site situation. In the position control mode of the side guide plate, the adjustment amounts of the positions on both sides are dynamically adjusted according to the pressure change on the pressure control side to ensure that the strip is aligned with the rolling center line.

[0046] The present invention also provides a coiling side guide plate control system, which can be implemented by executing the process steps of the coiling side guide plate control method. That is, those skilled in the art can understand the coiling side guide plate control method as a preferred implementation manner of the coiling side guide plate control system. The system specifically includes:

[0047] Module M1: After the strip enters the side guide plate, the side guide plate performs two short-stroke actions (the short-stroke action means that the fixed opening position on one side is reduced, generally 35 mm for the first time and 20 mm for the second time, which can be modified on the screen or selected in the program). After the head of the strip enters the pinch roll, the side guide plate enters the pressure control mode according to the set pressure. After the head of the strip enters the pinch roll, the side guide plate enters the pressure control mode in advance according to the set pressure threshold to improve the head coiling shape. Especially when the strip head shape is poor (scissor bend or S bend), the strip is clamped in advance to reduce the impact.

[0048] Module M2: In the pressure control mode, when the total pressure on both sides exceeds twice the set pressure and above, the side guide plate locks the current position and exits the pressure control mode.

[0049] Specifically, in the pressure control mode of the side guide plate, the total pressure is used as the basis for judging the contact situation between the strip and the side guide plate. When the total pressure exceeds twice the set pressure and above, the current position is locked and the pressure control mode is exited to prevent the strip from being blocked from advancing due to insufficient pressure on one side. Among them, the threshold of twice the set pressure and above can be adjusted according to the on-site situation.

[0050] Module M3: In the position control mode, when the total pressure increases, the opening of the side guide plate increases accordingly, and the positions on both sides also increase (the opening increases by 5 mm according to a 30% increase in the pressure, which can be adjusted according to the steel type, thickness, and width), ensuring that the strip is aligned with the rolling center line.

[0051] Specifically, in the position control mode of the side guide plate, when the pressure on the pressure control side increases, the opening increases accordingly, and at the same time, the position control side adjusts synchronously according to the position of the pressure control side to ensure that the strip is aligned with the rolling center line and prevent the strip from deviating to one side.

[0052] Module M4: When the side guide plate remains in the pressure control mode and the tail of the strip is ejected from the finishing mill, if the pressure continues to increase, when the position of the side guide plate opens to the strip width + 20 mm, it exits the pressure control mode and locks the current position.

[0053] Specifically, when the tail of the strip is ejected, if the pressure continues to increase, the side guide plate exits the pressure control mode in advance when the position opens to the strip width plus 20 mm and locks the current position to improve the coiling control of the strip tail.

[0054] Among them, when the tail of the strip is ejected, the adjustment amount of the opening position (strip width + 20 mm) can be adjusted according to the actual situation on site. In the position control mode of the side guide plate, the adjustment amounts of the positions on both sides are dynamically adjusted according to the pressure change of the pressure control side to ensure that the strip is aligned with the rolling center line.

[0055] Next, the present invention will be described in more detail.

[0056] The present invention provides a coiling side guide plate control method, which specifically includes:

[0057] 1. When the head of the strip enters the side guide plate, a short stroke is executed once. After the pinch roll bites the steel, it enters the second short stroke, or directly enters the pressure control when the side guide plate pressure reaches the set value (which can be modified) (directly enters the pressure control after the head builds tension). Compared with the general side guide plate head control method (i.e., executes the second short stroke after the head builds tension), the early short stroke action of the head is beneficial to the head coiling control. When the head shape is poor (sickle bend or S bend), the impact is large, and the side guide plate can enter the pressure ring to clamp the strip in advance (according to the set pressure threshold) to improve the head coiling. Compared with the general side guide plate pressure control (directly enters according to the pressure), after the head of the strip is bitten by the pinch roll, it is necessary to ensure that the head of the strip is controlled to prevent the side guide plate pressure control from directly clamping the strip to death. After the coiler builds tension, the side guide plate entering the pressure ring is the final protection measure to ensure that the side guide plate can finally enter the pressure ring to clamp the strip.

[0058] 2. When controlling the side guide plate pressure, when the total pressure on both sides exceeds twice the set pressure or more (adjustable according to the site), lock the current position and exit the pressure control. Since the pressure ring control of the side guide plate only controls one side (the drive side or the operation side), and the pressure can truly reflect the contact situation between the strip and the side guide plate, the pressure control should be the main at this time (the strip width may be abnormal). When the strip shape is poor, the contact with the side guide plate may be close to the non-pressure control side. Therefore, the total pressure is used to judge the contact situation between the strip and the side guide plate. If the total pressure is too large, it is considered that the side guide plate has clamped the strip (it may be biased to one side). Lock the current position and exit the pressure control to avoid insufficient pressure on one side. Continuously reducing the opening and then clamping the strip will cause the strip to be blocked from advancing.

[0059] 3. When in position control and the total pressure increases, the opening of the side guide plate increases, and the positions on both sides increase accordingly to avoid squeezing the strip and ensure that the strip is aligned with the rolling center line at the same time. When the side guide plate enters the pressure ring, only one side is in pressure control, and the other side is still in position control (it is impossible to ensure that the strip shape is completely normal and the contact situation on both sides of the side guide plate is the same. If both sides are in pressure control at the same time, it will push the strip to shift to one side). At this time, when the pressure on the pressure control side increases, the opening will increase. If the position control side is not adjusted, it will cause the strip to deviate to one side. The position control side of the side guide plate adjusts accordingly according to the position of the pressure control side, and the positions on both sides increase accordingly. On the one hand, it can avoid squeezing the strip, and at the same time, it can ensure that the strip is aligned with the rolling center line, which is beneficial to the coil shape control and can also ensure that the coil handling position of the uncoiler trolley is on the center line.

[0060] 4. When the side guide plate remains in pressure control and the tail of the strip is ejected from the finishing mill, if the pressure continues to increase (pressure control side), the side guide plate position is opened to the strip width + 20 mm (adjustable) and then the pressure control is exited and the current position is locked. During the normal control process, the pressure control will be exited when the tail of the strip leaves the side guide plate. Before that, due to the abnormal strip shape (sickle bend or S bend) at the tail of the strip, the pressure increases, and the pressure control side of the side guide plate will continue to open, and the tail coil shape is out of control. Before the normal sequence of exiting the pressure control, open the side guide plate to the strip width + 20 mm (adjustable) according to the side guide plate position and exit the pressure control in advance, and lock the current position, which is beneficial to the coil shape control of the strip tail.

[0061] The embodiment of the present invention provides a coiling side guide plate control method and system, which adds pressure protection in the position control and position protection in the pressure control during the single control of the side guide plate, and optimizes and adjusts the side guide plate control at the same time, which can effectively avoid problems such as side guide plate steel jamming, misalignment and edge breakout caused by poor strip shape.

[0062] Those skilled in the art know that, in addition to implementing the system and its various devices, modules, and units provided by the present invention in the form of pure computer-readable program code, the method steps can be logically programmed to enable the system and its various devices, modules, and units provided by the present invention to be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers, etc. to achieve the same functions. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a kind of hardware component, and the devices, modules, and units included therein for implementing various functions can also be regarded as the structures within the hardware component; the devices, modules, and units for implementing various functions can also be regarded as either software modules for implementing the method or structures within the hardware component.

[0063] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A coiling side guide control method, characterized in that, Including: Step S1: After the strip steel enters the side guide plate, the side guide plate performs two short-stroke actions. After the head of the strip steel enters the pinch roll, the side guide plate enters the pressure control mode according to the set pressure. Step S2: In the pressure control mode, when the total pressure on both sides exceeds twice the set pressure or more, the side guide plate locks the current position and exits the pressure control mode. Step S3: In the position control mode, when the total pressure increases, the opening of the side guide plate increases accordingly, and the positions on both sides also increase, ensuring that the strip steel is aligned with the rolling center line. Step S4: When the side guide plate remains in the pressure control mode and the tail of the strip steel is thrown off from the finishing mill, if the pressure continues to increase and the position of the side guide plate opens to the set value of the strip steel width, it exits the pressure control mode and locks the current position.

2. The coiling side guide control method according to claim 1, characterized in that, The said Step S1 includes: After the head of the strip steel enters the pinch roll, the side guide plate enters the pressure control mode in advance according to the set pressure threshold, changes the head shape, and clamps the strip steel in advance when the shape of the head of the strip steel is defective.

3. The coiling side guide control method according to claim 1, wherein The said Step S2 includes: In the pressure control mode, the side guide plate enters the pressure control only on one side, and the other side remains in the position control. When the shape of the strip steel is defective, the contact with the side guide plate is close to the non-pressure control side. The contact situation between the strip steel and the side guide plate is judged by the total pressure. If the total pressure is too large, it is considered that the side guide plate has clamped the strip steel, and the current position is locked and the pressure control is exited.

4. The coiling side guide control method according to claim 1, wherein The said Step S3 includes: In the position control mode, when the pressure on the pressure control side of the side guide plate increases, the opening increases accordingly, and the position control side adjusts synchronously according to the position of the pressure control side to ensure that the strip steel is aligned with the rolling center line and prevent the strip steel from deviating to one side.

5. The coiling side guide control method according to claim 1, wherein The said Step S4 includes: In the normal control process, the pressure control is exited when the tail of the strip steel leaves the side guide plate. If the shape of the tail of the strip steel is abnormal, it will cause the pressure to increase. The pressure control side of the side guide plate continues to open. Before the normal pressure control exit timing, when the strip steel width is opened to the set value according to the position of the side guide plate, the pressure control is exited in advance and the current position is locked.

6. A coiling side guide control system, characterized in that, Including: Module M1: After the strip steel enters the side guide plate, the side guide plate performs two short-stroke actions. After the head of the strip steel enters the pinch roll, the side guide plate enters the pressure control mode according to the set pressure. Module M2: In the pressure control mode, when the total pressure on both sides exceeds twice the set pressure or more, the side guide plate locks the current position and exits the pressure control mode. Module M3: In the position control mode, when the total pressure increases, the opening of the side guide plate increases accordingly, and the positions on both sides also increase, ensuring that the strip steel is aligned with the rolling center line. Module M4: When the side guide plate remains in the pressure control mode and the tail of the strip steel is thrown off from the finishing mill, if the pressure continues to increase and the position of the side guide plate opens to the set value of the strip steel width, it exits the pressure control mode and locks the current position.

7. The coiling side guide control system according to claim 6, wherein The said Module M1 includes: After the head of the strip steel enters the pinch roll, the side guide plate enters the pressure control mode in advance according to the set pressure threshold, changes the head shape, and clamps the strip steel in advance when the shape of the head of the strip steel is defective.

8. The coiling side guide control system according to claim 6, characterized in that, The said Module M2 includes: In the pressure control mode, the side guide plate enters the pressure control only on one side, and the other side remains in the position control. When the shape of the strip is defective, the contact with the side guide approaches the non-pressure control side. The total pressure is used to judge the contact situation between the strip and the side guide. If the total pressure is too high, it is considered that the side guide has clamped the strip, and the current position is locked to exit the pressure control.

9. The coiling side guide control system according to claim 6, characterized in that, The module M3 includes: in the position control mode of the side guide, when the pressure on the pressure control side increases, the opening degree increases accordingly. At the same time, the position control side is adjusted synchronously according to the position of the pressure control side to ensure that the strip is aligned with the rolling center line and prevent the strip from deviating to one side.

10. The coiling side guide control system according to claim 6, characterized in that, The module M4 includes: during the normal control process, the pressure control is exited when the tail of the strip leaves the side guide. If the shape of the strip tail is abnormal, it will cause the pressure to increase, and the pressure control side of the side guide will continue to open. Before the normal pressure control exit timing, the pressure control is exited in advance when the strip width is opened to the set value according to the side guide position, and the current position is locked.

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