A method and system for controlling the opening degree of guide plate at the inlet side of a coiler

Abstract

The present application provides a method and system for controlling the opening degree of the guide plate at the inlet side of the coiler, including: obtaining the deviation amount of the strip head at the finishing exit, if the strip head deviation amount exceeds the preset deviation amount threshold, then correcting the opening degree setting value of the guide plate at the inlet side of the coiler according to the strip head deviation amount; obtaining the excess width of the strip head at the finishing exit, if the strip head excess width amount exceeds the preset excess width amount threshold, then correcting the opening degree setting value of the guide plate at the inlet side of the coiler according to the strip head excess width amount; when the strip head at the finishing exit is seriously deviated or over-wide, controlling the guide plate at the inlet side of the coiler to open automatically, to avoid the steel piling accident caused by the strip head hitting the guide plate at the inlet side of the coiler. The present application can effectively prevent the potential accidents caused by the serious deviation of the finishing strip head or the over-wideness hitting the guide plate at the inlet side of the coiler, improve the rolling stability of the production line, and ensure smooth production.

Description

Technical Field

[0001] The invention relates to the application field of steel production, and in particular to a method and system for controlling the opening degree of a guide plate at an inlet side of a coiler. Background Art

[0002] The finishing exit of the hot rolling production line is usually equipped with a multifunctional instrument, which can detect the deviation of the finishing exit strip (the maximum deviation detection amount is ±100mm on both sides of the rolling center line) and the width. In the production process, due to the sickle bend of the intermediate billet or the wave shape between the frames, the head of the finishing strip often deviates seriously after the strip is threaded, and hits the guide plate piled on the entrance side of the coiler. The maximum deviation can reach ±100mm (the transmission side is +, and the operation side is -). The existing control technology has no automatic control method for the deviation of the finishing strip head, and there is a hidden danger of the strip head deviating and hitting the guide plate piled on the entrance side of the coiler; due to the excessive width of the intermediate billet head or the abnormal width control between the finishing mill frames, the width of the finishing strip head is often too wide. When the head of the finishing strip is too wide, the guide plate on the entrance side of the coiler fails to open in advance, resulting in a small setting of the opening of the guide plate on the entrance side of the coiler, and the strip head hits the guide plate piled on the entrance side of the coiler. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention proposes a method and system for controlling the opening degree of the guide plate at the entrance of the coiler, which mainly solves the potential accidents of serious deviation of the strip head and excessive width colliding with the steel pile on the guide plate at the entrance of the coiler, thereby avoiding the recurrence of similar scrap steel pile accidents.

[0004] In order to achieve the above purpose and other purposes, the technical solution adopted by the present invention is as follows.

[0005] The present application provides a method for controlling the opening degree of a guide plate at an inlet side of a coiler, comprising:

[0006] Obtain the deviation of the strip head at the finish rolling exit;

[0007] If the deviation amount of the strip head exceeds the preset deviation amount threshold, the opening degree setting value of the guide plate at the inlet side of the coiler is corrected according to the deviation amount of the strip head;

[0008] The movement of the single-side side guide plate at the coiler entrance is controlled according to the corrected opening degree setting value so that the strip head can pass through the coiler entrance smoothly.

[0009] In one embodiment of the present application, obtaining the deviation of the strip head at the finish rolling exit includes:

[0010] The steel presence detection and offset measurement are performed on the finishing rolling exit. When the steel presence signal is detected and after a preset time has passed, the measured offset is used as the deviation amount of the strip head.

[0011] In one embodiment of the present application, controlling the movement of the single-side side guide plate at the coiler entrance according to the corrected opening degree setting value includes:

[0012] Determining the deviation direction of the corresponding strip according to the deviation amount of the strip head, wherein the deviation direction includes a transmission side and an operation side;

[0013] If the deviation direction of the strip head is the transmission side, based on the original set opening degree of the guide plate on the inlet side of the coiler, the side guide plate on the transmission side is controlled to open the opening degree corresponding to the deviation amount of the strip head, so that the opening degree of the guide plate on the inlet side of the coiler is equal to the corrected opening degree setting value;

[0014] If the deviation direction of the strip head is to the operating side, based on the original set opening degree of the guide plate on the inlet side of the coiler, the side guide plate on the operating side is controlled to open the opening degree corresponding to the deviation amount of the strip head, so that the opening degree of the guide plate on the inlet side of the coiler is equal to the corrected opening degree setting value.

[0015] In one embodiment of the present application, after obtaining the strip head deviation amount at the finish rolling exit, the method further includes:

[0016] Get the maximum width of the strip head at the finish rolling exit;

[0017] If the deviation between the maximum width of the strip head and the target control width exceeds a preset over-width threshold, the deviation is used as the over-width of the head of the corresponding strip;

[0018] The side guide plates on both sides of the coiler entrance are controlled to open according to the excess width of the head, so that the strip head can pass through the coiler entrance smoothly.

[0019] In one embodiment of the present application, controlling the opening of the guide plate at the inlet side of the coiler according to the excess width of the head includes:

[0020] According to the excess width of the head, the original setting opening degree of the guide plate at the inlet side of the coiler is corrected to obtain a first opening degree correction value;

[0021] The side guide plates at the transmission side and the operating side of the coiler entrance are controlled to open so that the opening amount of the guide plates at both sides of the coiler entrance is equal to the first opening degree correction amount.

[0022] In one embodiment of the present application, controlling the opening of the guide plate at the inlet side of the coiler according to the excess width of the head includes:

[0023] According to the excess width of the head, the original opening degree of the guide plate at the inlet side of the coiler is corrected to obtain a second opening degree correction value;

[0024] The side guide plates at the transmission side and the operating side of the coiler entrance are controlled to open so that the opening amount of the guide plates at the coiler entrance is equal to the second opening degree correction amount.

[0025] The present application also provides a control system for the opening degree of a guide plate at an inlet side of a coiler, comprising:

[0026] The deviation acquisition module is used to obtain the deviation of the strip head measured at the finishing exit;

[0027] An opening correction module is used to correct the opening setting value of the guide plate at the inlet side of the coiler according to the strip head deviation amount if the strip head deviation amount exceeds a preset deviation amount threshold value;

[0028] The opening control module is used to control the movement of the guide plate at the inlet side of the coiler according to the corrected opening setting value, so that the strip head can pass through the inlet of the coiler smoothly.

[0029] As described above, a method and system for controlling the opening degree of a guide plate at an inlet side of a coiler according to the present invention have the following beneficial effects.

[0030] The present application can automatically correct the opening degree of the guide plate on the inlet side of the coiler according to the actual head deviation amount of the strip at the finishing exit, thereby avoiding the problem that the opening degree of the side guide plate is not adjusted in time or incorrectly due to the original manual judgment of the strip head deviation amount, resulting in the strip head deviation seriously colliding with the steel pile on the guide plate on the inlet side of the coiler. The application can effectively avoid the recurrence of similar scrap steel pile-up accidents, reduce the dependence of the opening degree correction of the guide plate on the inlet side of the coiler on manual operation, improve the rolling stability of the production line, and ensure smooth production. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flow chart of a method for controlling the opening degree of the guide plate at the inlet side of the coiler in one embodiment of the present application.

[0032] Figure 2 This is a module diagram of a control system for the guide plate opening degree at the inlet side of a coiler in one embodiment of the present application. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] The inventors have found that:

[0036] The existing control technology does not have an automatic control method for the deviation of the head of the finished strip, and there is a potential accident hazard of the strip head deviating and hitting the steel pile on the guide plate at the entrance of the coiler; the width of the head of the finished strip is often too wide due to reasons such as the excessive width of the intermediate billet head or abnormal width control between the finishing mill frames. The existing control technology is to pop up an alarm on the HMI screen when the head of the intermediate billet is too wide, and the coiling operator manually opens the opening of the guide plate on the entrance of the coiler to avoid the excessive width of the strip head hitting the steel pile on the guide plate on the entrance of the coiler. In the actual production process, the operator's side guide plate opening was not opened in time, which has caused multiple steel pile accidents, seriously affecting the stable and smooth production and the rolling yield.

[0037] Based on the above problems existing in the existing control technology, the embodiment of the present application provides a method and system for controlling the opening degree of the guide plate on the inlet side of a winder. The technical solution of the present application is described in detail below in conjunction with specific embodiments.

[0038] See also Figure 1 The present invention provides a method for controlling the opening degree of a guide plate at an inlet side of a coiler, the method comprising the following steps:

[0039] Step S100, obtaining the deviation of the strip head at the finish rolling exit;

[0040] Step S110, if the deviation amount of the strip head exceeds a preset deviation amount threshold, then correcting the opening degree setting value of the guide plate at the inlet side of the coiler according to the deviation amount of the strip head;

[0041] Step S120, controlling the movement of the single-side side guide plate at the coiler entrance according to the corrected opening degree setting value, so that the strip head can pass through the coiler entrance smoothly.

[0042] In one embodiment, the strip is rolled into a steel coil by an underground coiler after finishing rolling. When the first stand of finishing rolling bites the steel, the opening degree setting value of the guide plate at the inlet side of the coiler is issued, and the opening degree setting value controls the head of the strip to smoothly enter the underground coiler. In the actual finishing rolling process, the strip may have sickle bends or waves between the stands of the finishing mill, which may cause the head of the finishing strip to deviate seriously after the strip is threaded, and hit the guide plate at the inlet side of the coiler. Since the opening setting value of the guide plate on the inlet side of the coiler has been issued when the first stand of the finishing rolling mill bites the steel, no side guide plate opening setting data is reissued during the subsequent rolling process. When the head deviation of the finishing strip is serious or the width is too wide, the original issued opening setting value of the guide plate on the inlet side of the coiler does not match the actual head deviation and width of the finishing strip at the exit. Therefore, the present application provides a function for reissuing the opening setting of the guide plate on the inlet side of the coiler, detects the head deviation and width of the finishing strip at the exit, and reissues the opening setting based on the actual measured results.

[0043] In step S100, the deviation of the strip head at the finishing exit is obtained, including: steel detection and offset measurement at the finishing exit, when the steel signal is detected and after a preset time, the measured offset is used as the deviation of the strip head.

[0044] Specifically, a multifunctional instrument installed at the finishing exit can be used to detect whether there is steel at the finishing exit. When the steel signal is detected for a period of time, the deviation of the strip head from the rolling center line at the finishing exit is further measured, and the deviation is used as the strip head deviation.

[0045] In step S110, the opening degree setting value of the guide plate at the inlet side of the coiler can be further calculated according to the obtained strip head deviation. And the opening degree setting value is reissued according to the calculated opening degree setting value to complete the opening degree setting value correction. The calculation method of the opening degree setting value of the guide plate at the inlet side of the coiler issued when the first stand of the finishing rolling bites the steel can be expressed as follows:

[0046] SG = finished product control width (cold state) * 1.0083 + process table correction amount + screen correction amount;

[0047] Wherein: SG is the setting value of the guide plate opening at the inlet side of the coiler; 1.0083 is the conversion coefficient of the hot and cold states of the strip; the finished product control width (cold state), the process table correction amount and the screen correction amount are all pre-set constants. The specific values ​​can be adjusted according to actual production needs and are not restricted here.

[0048] When the opening degree setting value is corrected according to the strip head deviation amount, the strip head deviation amount can be added to the opening degree setting value issued last time.

[0049] In one embodiment, after the multifunctional instrument at the finishing exit detects the steel signal for 2 seconds, if the strip head deviation is greater than 30 mm, the coiler entrance guide plate opening setting value is automatically reissued. There are two cases for correcting the coiler entrance guide plate opening setting value according to the strip head deviation.

[0050] In the first case, the strip head deviates from the transmission side. After the strip head is detected for 2 seconds, if the strip head deviates from the transmission side by more than 30 mm, the deviation amount on the transmission side will be added to the opening setting value issued last time. The specific calculation method is as follows:

[0051] SG = cold control width * 1.0083 + process table correction + screen correction + transmission side deviation;

[0052] In the second case, the strip head deviates from the operating side. After the finishing strip head is detected for 2 seconds, if the strip head deviates from the operating side by more than 30 mm, the deviation amount on the operating side will be added to the opening setting value issued last time. The specific calculation method is as follows:

[0053] SG = cold control width * 1.0083 + process table correction amount + screen correction amount + operating side deviation amount;

[0054] After the opening degree setting value of the corresponding coiler entrance side guide is recalculated, the opening degree setting value can be reissued so that the corresponding coiler entrance side guide can be automatically opened to the corresponding deviation amount according to the reissued opening degree setting value. The opening degree setting of the coiler entrance side guide can be automatically corrected by the deviation amount of the strip head, which can effectively avoid the recurrence of the accident that the strip head deviates seriously and hits the coiler entrance side guide plate steel pile.

[0055] The above only takes 30 mm as an example of the deviation threshold. The specific deviation threshold can be adjusted according to actual production needs and is not limited here.

[0056] In step S120, the movement of the single-side side guide plate at the coiler entrance is controlled according to the corrected opening degree setting value, including:

[0057] Determining the deviation direction of the corresponding strip according to the deviation amount of the strip head, wherein the deviation direction includes a transmission side and an operation side;

[0058] If the deviation direction of the strip head is the transmission side, based on the original set opening degree of the guide plate on the inlet side of the coiler, the side guide plate on the transmission side is controlled to open the opening degree corresponding to the deviation amount of the strip head, so that the opening degree of the guide plate on the inlet side of the coiler is equal to the corrected opening degree setting value;

[0059] If the deviation direction of the strip head is to the operating side, based on the original set opening degree of the guide plate on the inlet side of the coiler, the side guide plate on the operating side is controlled to open the opening degree corresponding to the deviation amount of the strip head, so that the opening degree of the guide plate on the inlet side of the coiler is equal to the corrected opening degree setting value.

[0060] Specifically, since the measurement of the deviation of the head of the finished rolling exit strip is based on the rolling center line, there are positive and negative differences in the values ​​of different deviation directions. The deviation direction of the head of the strip can be determined based on the value of the deviation of the head of the strip. According to the calculation method in the previous steps, assuming that the control width of the cold strip is 1510mm, and the deviation of the head of the strip on the transmission side is measured to be 100mm, the opening setting value of the guide plate on the inlet side of the coiler is

[0061] =1510mm*1.0083+20mm+10mm+100mm=1652.53mm, among which the opening degree of the side guide plate on the transmission side is 876.26mm (the transmission side is opened 100mm on one side), and the opening degree of the side guide plate on the operating side is 776.26mm.

[0062] Similarly, assuming that the controlled width of the cold strip is 1510mm, and the measured deviation of the strip head operating side reaches 80mm, the setting value of the guide plate opening at the coiler entrance side is

[0063] =1510mm*1.0083+20mm+10mm+80mm=1632.53mm, among which the opening of the side guide plate on the transmission side is 776.26mm, and the opening of the side guide plate on the operating side is 856.26mm (the operating side is opened 80mm on one side).

[0064] In one embodiment, when the deviation of the strip head exceeds the deviation threshold, an alarm message can be displayed through the human-computer interaction interface. Specifically, when the deviation of the strip head exceeds ±30mm (+ for the transmission side and - for the operation side), the coiling HMI screen automatically pops up an alarm prompt "The strip head deviates from the transmission side or the operation side + the actual deviation", so as to remind the coiling operator to pay attention to whether the corresponding single-side side guide is normally opened and in place.

[0065] In one embodiment, after obtaining the strip head deviation amount at the finish rolling exit, the method further includes:

[0066] Get the maximum width of the strip head at the finish rolling exit;

[0067] If the deviation between the maximum width of the strip head and the target control width exceeds a preset over-width threshold, the deviation is used as the over-width of the head of the corresponding strip;

[0068] The side guide plates on both sides of the coiler entrance are controlled to open according to the excess width of the head, so that the strip head can pass through the coiler entrance smoothly, avoiding the coiler entrance side guide plate opening being set too small, which may cause the strip head to collide with the coiler entrance side guide plate pile.

[0069] Specifically, while measuring the deviation of the strip head at the finishing exit, the multi-function instrument can also be used to measure the width of the strip head at the finishing exit to determine whether the strip head width is too wide. The difference between the strip head width and the target control width can be used as the strip head overwidth. If the strip head overwidth is less than 10mm 2s after the steel signal is detected at the finishing exit, the opening of the side guide plate at the coiler entrance has a set margin based on the calorific value of the finished strip width. In order to ensure that the coil shape of the strip head is controlled, the opening of the side guide plate at the coiler entrance is set according to the original control method. The side guide plate opening calculation method is as follows:

[0070] SG = cold control width * 1.0083 + process table correction amount + screen correction amount;

[0071] For example, if the strip width is 1510mm and the maximum width of the head is 1518mm, the opening setting value of the guide plate on the inlet side of the coiler = 1510mm*1.0083+20mm+10mm=1552.53mm.

[0072] In one embodiment, controlling the opening of the guide plate at the inlet side of the coiler according to the excess width of the head includes:

[0073] According to the excess width of the head, the original opening degree of the guide plate at the inlet side of the coiler is corrected to obtain a first opening degree correction value;

[0074] The side guide plates on the transmission side and the operating side of the coiler entrance are controlled to open so that the opening amount of the side guide plates on both sides of the coiler entrance is equal to the first opening degree correction amount.

[0075] If the strip head is over-width greater than 10mm, the coiling side guide opening must be opened in time (both sides open at the same time) to ensure that the over-width part of the strip head passes smoothly through the coiler entrance side guide to avoid the over-width part of the finished strip head hitting the coiler entrance side guide pile. The side guide opening setting value (i.e. the first opening correction value) is calculated as follows:

[0076] SG = cold control width * 1.0083 + process table correction + screen correction + (maximum head measured width - cold control width);

[0077] For example, if the strip steel has a width of 1510 mm and a maximum head width of 1535 mm, the coiler inlet guide plate opening setting value = 1510 mm * 1.0083 + 20 mm + 10 mm + (1535 mm - 1510 mm)

[0078] =1577.53mm, the side guides on both sides are opened 12.5mm each.

[0079] In one embodiment, when the width of the strip head exceeds 10 mm, the coiling human-computer interaction screen automatically pops up an alarm prompting "strip head is too wide + actual excess width" to remind the coiling operator to pay attention to whether the opening of the side guide plates on both sides of the coiling is normally opened.

[0080] The above only takes 10mm as an example of the head over-width threshold. The specific head over-width threshold can be adjusted according to actual production needs and is not limited here.

[0081] In one embodiment, controlling the opening of the guide plate at the inlet side of the coiler according to the excess width of the head includes:

[0082] According to the excess width of the head, the original opening degree of the guide plate at the inlet side of the coiler is corrected to obtain a second opening degree correction value;

[0083] The side guide plates at the transmission side and the operating side of the coiler entrance are controlled to open so that the opening amount of the guide plates at the coiler entrance is equal to the second opening degree correction amount.

[0084] Specifically, if the deviation of the head of the finished strip is greater than 30 mm and the excess width of the head of the strip is greater than 10 mm, the calculation method of the guide plate opening at the entrance side of the coiler (i.e., the second opening correction amount) is as follows:

[0085] SG = cold control width * 1.0083 + process table correction + screen correction + transmission or operation side deviation + (maximum head measured width - cold control width);

[0086] For example, if the strip steel with a width of 1510 mm is controlled, the deviation on the operating side reaches 80 mm, and the maximum width of the head is 1530 mm, then the setting value of the guide plate opening on the inlet side of the coiler is

[0087] =1510mm*1.0083+20mm+10mm+80mm+(1530mm-1510mm)=1652.53mm, wherein the opening setting value of the side guide plate on the transmission side is: 1552.53mm / 2+10mm=786.26mm, and the opening setting value of the side guide plate on the operating side is: 1552.53mm / 2+80mm+10mm=866.26mm.

[0088] Based on the above technical scheme, the present application can effectively solve the problem that the existing control technology lacks an automatic control method for the deviation of the head of the finished strip, thereby avoiding the repeated occurrence of the accident of the head of the finished strip hitting the guide plate on the inlet side of the coiler when the deviation is serious, eliminating the hidden dangers of the scrap steel pile accident, and improving the stability of the finishing rolling; effectively avoiding the repeated occurrence of the accident of steel piling due to the manual opening of the guide plate on the inlet side of the ultra-wide coiler at the head of the finished strip, thereby ensuring stable and smooth production and improving the rolling yield rate.

[0089] See also Figure 2 This embodiment also provides a control system for the opening degree of the guide plate at the inlet side of the coiler, which is used to execute the control method for the opening degree of the guide plate at the inlet side of the coiler described in the aforementioned method embodiment. Since the technical principle of the system embodiment is similar to the technical principle of the aforementioned method embodiment, the same technical details will not be repeated.

[0090] In one embodiment, a coiler inlet side guide plate opening control system includes: a deviation amount acquisition module 10, used to obtain the deviation amount of the strip head at the finishing rolling outlet; an opening degree correction module 11, used to correct the coiler inlet side guide plate opening setting value according to the strip head deviation amount if the strip head deviation amount exceeds a preset deviation amount threshold; an opening degree control module 12, used to control the single-side side guide action of the coiler inlet according to the corrected opening degree setting value, so that the strip head can pass through the coiler inlet smoothly.

[0091] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for controlling the opening degree of the guide plate at the inlet side of a coiler, characterized in that: include: Obtain the strip head deviation at the finish rolling exit; Obtaining the deviation of the head of the strip at the finishing exit, including: detecting the presence of steel at the finishing exit and measuring the deviation, when a steel signal is detected and after a preset time, using the measured deviation as the deviation of the head of the strip; If the deviation amount of the strip head exceeds the preset deviation amount threshold, the opening degree setting value of the guide plate at the inlet side of the coiler is corrected according to the deviation amount of the strip head; Controlling the movement of the unilateral side guide plate at the coiler entrance according to the revised opening setting value so that the strip head can pass through the coiler entrance smoothly; controlling the movement of the unilateral side guide plate at the coiler entrance according to the revised opening setting value includes: determining the deviation direction of the corresponding strip according to the deviation amount of the strip head, wherein the deviation direction includes the transmission side and the operation side; if the deviation direction of the strip head is the transmission side, then based on the original setting opening of the coiler entrance side guide plate, controlling the side guide plate on the transmission side to open the opening corresponding to the deviation amount of the strip head, so that the opening of the coiler entrance side guide plate is equal to the revised opening setting value; if the deviation direction of the strip head is the operation side, then based on the original setting opening of the coiler entrance side guide plate, controlling the side guide plate on the operation side to open the opening corresponding to the deviation amount of the strip head, so that the opening of the coiler entrance side guide plate is equal to the revised opening setting value.

2. The method for controlling the opening degree of the guide plate at the inlet side of the coiler according to claim 1, characterized in that: After obtaining the strip head deviation at the finishing exit, it also includes: Get the maximum width of the strip head at the finish rolling exit; If the deviation between the maximum width of the strip head and the target control width exceeds the preset over-width threshold, the deviation is used as the over-width of the head of the corresponding strip; The side guide plates on both sides of the coiler entrance are controlled to open according to the excess width of the head, so that the strip head can pass through the coiler entrance smoothly.

3. The method for controlling the opening degree of the guide plate at the inlet side of the coiler according to claim 2, characterized in that: Controlling the opening of the guide plate at the inlet side of the coiler according to the excess width of the head includes: According to the excess width of the head, the original setting opening degree of the guide plate at the inlet side of the coiler is corrected to obtain a first opening degree correction value; The side guide plates at the transmission side and the operating side of the coiler entrance are controlled to open so that the opening amount of the guide plates at both sides of the coiler entrance is equal to the first opening degree correction amount.

4. The method for controlling the opening degree of the guide plate at the inlet side of the coiler according to claim 2, characterized in that: Controlling the opening of the guide plate at the inlet side of the coiler according to the excess width of the head includes: According to the excess width of the head, the original opening degree of the guide plate at the inlet side of the coiler is corrected to obtain a second opening degree correction value; The side guide plates at the transmission side and the operating side of the coiler entrance are controlled to open so that the opening amount of the guide plates at the coiler entrance is equal to the second opening degree correction amount.

5. A control system for the opening degree of the guide plate at the inlet side of a coiler for executing the method for controlling the opening degree of the guide plate at the inlet side of a coiler according to any one of claims 1 to 3, characterized in that: include: The deviation acquisition module is used to obtain the deviation of the strip head measured at the finishing exit; An opening correction module is used to correct the opening setting value of the guide plate at the inlet side of the coiler according to the strip head deviation amount if the strip head deviation amount exceeds a preset deviation amount threshold value; The opening control module is used to control the movement of the single-side side guide plate of the coiling machine according to the corrected opening setting value, so that the strip head can pass through the coiler entrance smoothly.

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