Strip Deviation Control Method, Device and Equipment for Cold Rolling Continuous Annealing Production Line

Abstract

The present invention discloses a strip deviation control method, device and equipment for a cold rolling continuous annealing production line. The cold rolling continuous annealing production line includes an entrance loop and a continuous annealing furnace. The method includes: when strip production is carried out on the cold rolling continuous annealing production line, obtaining the actual width of the target strip; if the actual width is less than the preset width, obtaining the entrance deviation amount of the target strip at the entrance loop and the strip defects of the target strip; based on the entrance deviation amount and the strip defects, controlling the strip production process of the cold rolling continuous annealing production line to reduce the deviation amount of the target strip in the cold rolling continuous annealing production line. By means of the present invention, the technical problem that the strip is likely to deviate during production is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of strip steel production, and in particular relates to a strip steel deviation control method, device and equipment for a cold rolling and annealing production line. Background Art

[0002] The cold rolling annealing line has a fast production pace, a large number of narrow material production orders, differences in raw material plate quality, many process requirements, high production line qualification rate requirements, and great difficulty in furnace area control. Therefore, the strip is likely to deviate during production, which will cause accidents such as scraping the furnace wall and breaking the strip or damage to the equipment in the furnace, thus affecting the normal and stable production of the production line and posing a major safety hazard. Therefore, the high possibility of strip deviation during production is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The embodiments of the present invention provide a method, device and equipment for controlling strip deviation in a cold rolling and annealing production line, which solve the technical problem that the strip is likely to deviate during production.

[0004] In the first aspect, an embodiment of the present invention provides a strip deviation control method for a cold rolling and continuous annealing production line, wherein the cold rolling and continuous annealing production line includes an entrance looper and a continuous annealing furnace, and the method includes: when the cold rolling and continuous annealing production line is producing strip, obtaining the actual width of the target strip; if the actual width is less than the preset width, obtaining the entrance deviation amount of the target strip at the entrance looper and the strip defects of the target strip; based on the entrance deviation amount and the strip defects, controlling the strip production process of the cold rolling and continuous annealing production line to reduce the deviation amount of the target strip in the cold rolling and continuous annealing production line.

[0005] In combination with the first aspect of the present invention, in some embodiments, the preset width is 1250 mm.

[0006] In combination with the first aspect of the present invention, in some embodiments, the strip production process of the cold rolling continuous annealing production line is controlled based on the entrance deviation amount and the strip defect, including: if the entrance deviation amount is greater than a preset deviation amount threshold, controlling the running speed of the target strip to be less than a preset speed; if the strip defect is a wave defect or a sickle bend defect, reducing the speed of the target strip and increasing the tension.

[0007] In combination with the first aspect of the present invention, in some implementations, the preset deviation threshold is 70 mm, and the preset speed is 220 m / min.

[0008] In combination with the first aspect of the present invention, in some embodiments, the control of the strip production process of the cold rolling continuous annealing production line based on the entry deviation amount and the strip defect further includes: if the entry deviation amount is not greater than a preset deviation amount threshold and the strip defect does not exist, controlling the temperature of the P2 pyrometer in the furnace heating section of the continuous annealing furnace to be within a preset first temperature range, controlling the temperature of the P3 pyrometer in the furnace heating section of the continuous annealing furnace to be within a preset second temperature range, controlling the hourly output of the furnace area of the continuous annealing furnace to be less than a preset output threshold, and increasing the tension of the target strip in the first heating section and the second heating section of the continuous annealing furnace, wherein the lower limit value of the second temperature range is greater than the upper limit value of the first temperature range.

[0009] In combination with the first aspect of the present invention, in some embodiments, the preset deviation amount threshold is 70 mm, the first temperature range is 500 °C to 600 °C, the second temperature range is 730 °C to 750 °C, and the preset output threshold is 150 t / h.

[0010] In combination with the first aspect of the present invention, in some embodiments, it further includes:

[0011] If the production plan of the cold rolling continuous annealing production line is greater than a preset coil number threshold, controlling a group of thermal crown fans of the continuous annealing furnace to be in a working state, and controlling the power output value of the group of thermal crown fans to be within a preset percentage range.

[0012] In combination with the first aspect of the present invention, in some embodiments, the preset coil number threshold is 20 coils, the group of thermal crown fans includes the first thermal crown fan, the second thermal crown fan, and the third thermal crown fan of the continuous annealing furnace, and the preset percentage range is 30% to 50%.

[0013] In a second aspect, an embodiment of the present invention provides a strip deviation control device for a cold rolling continuous annealing production line. The cold rolling continuous annealing production line includes an entry loop and a continuous annealing furnace. The device includes: a first acquisition unit for acquiring the actual width of a target strip when the cold rolling continuous annealing production line produces the strip; a second acquisition unit for acquiring the entry deviation amount of the target strip at the entry loop and the strip defect of the target strip if the actual width is less than a preset width; and a production control unit for controlling the strip production process of the cold rolling continuous annealing production line based on the entry deviation amount and the strip defect to reduce the deviation amount of the target strip in the cold rolling continuous annealing production line.

[0014] In a third aspect, an embodiment of the present invention provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where when the processor executes the computer program, the method described in any one of the first aspect is implemented.

[0015] One or more technical solutions provided by the embodiments of the present invention at least achieve the following technical effects or advantages:

[0016] In the embodiment of the present invention, when strip steel is produced on a cold rolling continuous annealing production line, the actual width of the target strip steel is obtained; if the actual width is less than the preset width, the entry deviation amount of the target strip steel at the entry loop and the strip steel defects of the target strip steel are obtained; based on the entry deviation amount and the strip steel defects, the strip steel production process of the cold rolling continuous annealing production line is controlled to reduce the deviation amount of the target strip steel on the cold rolling continuous annealing production line. In the case of reducing the deviation amount of the target strip steel on the cold rolling continuous annealing production line, the possibility of the strip steel deviating during production is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a flowchart of the strip steel deviation control method for a cold rolling continuous annealing production line in an embodiment of the present invention;

[0019] Figure 2 It is a functional module diagram of the strip steel deviation control device for a cold rolling continuous annealing production line in an embodiment of the present invention;

[0020] Figure 3 It is a schematic structural diagram of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] In the present invention, descriptions such as "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or is unachievable, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] An embodiment of the present invention provides a strip deviation control method for a cold rolling continuous annealing production line. The cold rolling continuous annealing production line includes an entry loop and a continuous annealing furnace. Referring Figure 1 as shown, the method includes the following steps S101 to S103:

[0024] S101: When strip production is carried out on the cold rolling continuous annealing production line, obtain the actual width of the target strip.

[0025] S102: If the actual width is less than the preset width, obtain the entry deviation amount of the target strip at the entry loop and the strip defects of the target strip.

[0026] It should be noted that the actual width being less than the preset width indicates that the target strip is a narrow strip, and the preset width can be 1250 mm.

[0027] In some embodiments, obtaining the entry deviation amount of the target strip at the entry loop may be: obtaining the video recording of the camera, and obtaining the entry deviation amount based on the video recording. Among them, the camera can be placed near the entry loop, and the shooting area of the camera is aligned with the strip at the entry loop.

[0028] S103: Based on the entry deviation amount and the strip defects, control the strip production process of the cold rolling continuous annealing production line to reduce the deviation amount of the target strip in the cold rolling continuous annealing production line.

[0029] In some embodiments, step S103 may include: if the entry deviation amount is greater than the preset deviation amount threshold, control the running speed of the target strip to be less than the preset speed; if the strip defect is a wavy defect or a camber defect, reduce the speed and increase the tension of the target strip.

[0030] It should be noted that the preset deviation amount threshold can be 70 mm, and the preset speed can be 220 m / min. Among them, if the entry deviation amount is greater than the preset deviation amount threshold and the running speed of the target strip is controlled to be less than 220 m / min, it can prevent the increase of the strip deviation amount and minimize the occurrence of strip breakage to the greatest extent.

[0031] It should be noted that after the running speed of the target strip steel is controlled to be less than the preset speed, if there is no obvious deviation of the target strip steel before entering the furnace, since there is a risk of deviation when the target strip steel passes through the first heating section of the continuous annealing furnace, in order to prevent the deviation from occurring, after the weld passes through the second heating section of the continuous annealing furnace of the continuous annealing line, the normal operation can be gradually restored.

[0032] In some embodiments, step S103 may further include: if the inlet deviation amount is not greater than the preset deviation amount threshold and there is no strip steel defect, control the temperature of the pyrometer P2 in the heating section P2 of the continuous annealing furnace to be within a preset first temperature range, control the temperature of the pyrometer P3 in the heating section P3 of the continuous annealing furnace to be within a preset second temperature range, control the hourly output of the furnace area of the continuous annealing furnace to be less than the preset output threshold, and increase the tension of the target strip steel in the first heating section and the second heating section of the continuous annealing furnace. The lower limit value of the second temperature range is greater than the upper limit value of the first temperature range.

[0033] Among them, the preset deviation amount threshold may be 70 mm, the first temperature range may be 500 °C to 600 °C, the second temperature range may be 730 °C to 750 °C, and the preset output threshold may be 150 t / h.

[0034] It should be noted that the heating section of the continuous annealing furnace of the continuous annealing line includes the first heating section of the continuous annealing furnace of the continuous annealing line, the second heating section of the continuous annealing furnace of the continuous annealing line, and the third heating section of the continuous annealing furnace of the continuous annealing line. The pyrometers in the heating section of the furnace area include the pyrometer P1 in the heating section P1 of the furnace area, the pyrometer P2 in the heating section P2 of the furnace area, and the pyrometer P3 in the heating section P3 of the furnace area. The pyrometer P1 in the heating section P1 of the furnace area is arranged at the inlet end of the first heating section of the continuous annealing furnace of the continuous annealing line, the pyrometer P2 in the heating section P2 of the furnace area is arranged between the first heating section of the continuous annealing furnace and the second heating section of the continuous annealing furnace of the continuous annealing line, and the pyrometer P3 in the heating section P3 of the furnace area is arranged between the second heating section of the continuous annealing furnace and the third heating section of the continuous annealing furnace of the continuous annealing line. Since the temperature control range of the pyrometer P2 in the heating section P2 of the furnace area covers the first heating section of the continuous annealing furnace to the second heating section of the continuous annealing furnace of the continuous annealing line, and the temperature control range of the pyrometer P3 in the heating section P3 of the furnace area covers the second heating section of the continuous annealing furnace to the third heating section of the continuous annealing furnace of the continuous annealing line, therefore, the setting of the first temperature range and the second temperature range ensures the constant temperature of the heating section of the furnace area and guarantees the heating capacity in the furnace when the strip steel passes through, so as to prevent the strip steel from deviating. In addition, increasing the tension of the first heating section and the second heating section of the continuous annealing furnace can also prevent the strip steel from deviating.

[0035] In some embodiments, the strip steel deviation control method for the cold rolling continuous annealing production line may further include: if the production plan of the cold rolling continuous annealing production line is greater than the preset coil number threshold, control a group of thermal crown fans of the continuous annealing furnace to be in the working state, and control the power output value of the group of thermal crown fans to be within a preset percentage range.

[0036] It should be noted that the preset coil number threshold can be 20 coils. A group of hot crown fans can include the first hot crown fan, the second hot crown fan, and the third hot crown fan of the continuous annealing furnace. The preset percentage range can be 30% - 50%. By setting the preset coil number threshold, a group of hot crown fans, and the preset percentage range, when continuously producing strip steel of a batch specification, using the hot crown fans mainly ensures uniform through-width heating of the strip steel, while ensuring the shape and quality of the strip steel, preventing the occurrence of risks such as strip steel warping and deviation.

[0037] It should be noted that if defects such as large incoming wave shape or sickle bend are found, preventive measures such as reducing speed and increasing tension should be taken in advance to control deviation. After the narrow strip enters the furnace, closely monitor the running condition of the strip steel in the furnace through a monitor. Avoid frequent large-scale speed increase and decrease under normal circumstances. If abnormal deviation is found, execute the strip steel deviation handling measures.

[0038] It should be noted that the embodiment of the present invention effectively solves the problem of deviation of narrow strip production in the furnace area, ensuring the stability and continuity of the production line. Especially in the continuous annealing line, the production rhythm is fast, the specifications change frequently, and the following problems are likely to occur: narrow strip deviation problem, deviation and edge scraping in the furnace area, and strip breakage in the furnace, affecting the production rhythm and product quality of the production line, and increasing the consumption of energy media. The embodiment of the present invention well solves the above problems.

[0039] In the embodiment of the present invention, when strip steel is produced on a cold rolling continuous annealing production line, the actual width of the target strip steel is obtained; if the actual width is less than the preset width, the incoming deviation amount of the target strip steel at the entry loop and the strip steel defects of the target strip steel are obtained; based on the incoming deviation amount and the strip steel defects, the strip steel production process of the cold rolling continuous annealing production line is controlled to reduce the deviation amount of the target strip steel on the cold rolling continuous annealing production line. In the case of reducing the deviation amount of the target strip steel on the cold rolling continuous annealing production line, the possibility of strip steel deviation during production is also reduced.

[0040] Based on the same inventive concept, as shown in Figure 2 the embodiment of the present invention provides a strip steel deviation control device 10 for a cold rolling continuous annealing production line. The cold rolling continuous annealing production line includes an entry loop and a continuous annealing furnace. The device includes: a first acquisition unit 110, configured to obtain the actual width of the target strip steel when strip steel is produced on the cold rolling continuous annealing production line; a second acquisition unit 120, configured to obtain the incoming deviation amount of the target strip steel at the entry loop and the strip steel defects of the target strip steel if the actual width is less than the preset width; a production control unit 130, configured to control the strip steel production process of the cold rolling continuous annealing production line based on the incoming deviation amount and the strip steel defects to reduce the deviation amount of the target strip steel on the cold rolling continuous annealing production line.

[0041] Among them, the preset width is 1250 mm.

[0042] It can be understood that the production control unit 130 includes: a first control subunit, which is used to control the running speed of the target strip steel to be less than the preset speed if the entrance deviation amount is greater than the preset deviation amount threshold; if the strip steel defect is a wavy defect or a sickle bend defect, reduce the speed and increase the tension of the target strip steel.

[0043] Among them, the preset deviation amount threshold is 70 mm, and the preset speed is 220 m / min.

[0044] It can be understood that the production control unit 130 further includes: a second control subunit, which is used to control the temperature of the P2 pyrometer in the furnace zone heating section of the continuous annealing furnace to be within a preset first temperature range, control the temperature of the P3 pyrometer in the furnace zone heating section of the continuous annealing furnace to be within a preset second temperature range, control the hourly output of the furnace zone of the continuous annealing furnace to be less than the preset output threshold, and increase the tension of the target strip steel in the first heating section and the second heating section of the continuous annealing furnace if the entrance deviation amount is not greater than the preset deviation amount threshold and there is no strip steel defect, and the lower limit value of the second temperature range is greater than the upper limit value of the first temperature range.

[0045] Among them, the preset deviation amount threshold is 70 mm, the first temperature range is 500°C to 600°C, the second temperature range is 730°C to 750°C, and the preset output threshold is 150 t / h.

[0046] It can be understood that the strip steel deviation control device 10 of the cold rolling continuous annealing production line further includes: a fan control unit, which is used to control a group of thermal crown fans of the continuous annealing furnace to be in a working state and control the power output value of the group of thermal crown fans to be within a preset percentage range if the production plan of the cold rolling continuous annealing production line is greater than the preset coil number threshold.

[0047] Among them, the preset coil number threshold is 20 coils, a group of thermal crown fans includes the first thermal crown fan, the second thermal crown fan and the third thermal crown fan of the continuous annealing furnace, and the preset percentage range is 30% to 50%.

[0048] It should be understood that more implementation details of the strip steel deviation control device 10 of the cold rolling continuous annealing production line in the embodiments of the present invention are referred to the strip steel deviation control method of the cold rolling continuous annealing production line described above. For the sake of simplicity of the specification, it will not be repeated here.

[0049] Based on the same inventive concept, the embodiments of the present invention also provide an electronic device, as Figure 3 shown, including a memory 304, a processor 302, and a computer program stored on the memory 304 and executable on the processor 302. The processor 302 executes the program to implement the steps of any implementation manner of the strip steel deviation control method embodiment of the cold rolling continuous annealing production line.

[0050] Among them, inFigure 3 In [description], a bus architecture (represented by bus 300) may include any number of interconnected buses and bridges. Bus 300 links together various circuits of one or more processors represented by processor 302 and a memory represented by memory 304. Bus 300 may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and thus will not be further described herein. Bus interface 305 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 may be used to store data used by processor 302 when performing operations.

[0051] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. In addition, each functional unit may be integrated in one processing unit, may exist physically separately as individual units, or two or more units may be integrated in one unit.

[0052] In several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units may be a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the couplings or direct couplings or communication connections shown or discussed among each other may be through some interfaces, and the indirect couplings or communication connections of units or modules may be in electrical or other forms.

[0053] The units described as separate components may or may not be physically separated. The components serving as control devices may or may not be physical units, i.e., they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0054] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs that can store program codes.

[0055] The above are only the embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A method for controlling strip deviation in a cold rolling and annealing production line, characterized in that: The cold rolling and annealing production line comprises an inlet looper and a continuous annealing furnace, and the method comprises: When the cold rolling and annealing production line is producing strip steel, obtaining the actual width of the target strip steel; If the actual width is less than the preset width, the entrance deviation of the target strip at the entrance loop and the strip defects of the target strip are obtained; the preset width is 1250mm; the actual width is less than the preset width, indicating that the target strip is a narrow strip; Based on the entry deviation amount and the strip defect, the strip production process of the cold rolling and continuous annealing production line is controlled to reduce the deviation amount of the target strip in the cold rolling and continuous annealing production line; wherein, based on the entry deviation amount and the strip defect, the strip production process of the cold rolling and continuous annealing production line is controlled, including: if the entry deviation amount is greater than a preset deviation amount threshold, controlling the running speed of the target strip to be less than a preset speed; if the strip defect is a wave defect or a sickle bend defect, reducing the speed and increasing the tension of the target strip; if the entry deviation amount is not greater than the preset deviation amount threshold, controlling the running speed of the target strip to be less than a preset speed; if the strip defect is a wave defect or a sickle bend defect, reducing the speed and increasing the tension of the target strip; if the entry deviation amount is not greater than the preset deviation amount threshold, controlling the running speed of the target strip to be less than a preset speed; if the strip defect is a wave defect or a sickle bend defect, reducing the speed and increasing the tension of the target strip; if the entry deviation amount is not greater than the preset deviation amount threshold, controlling the running speed of the target strip to be less than a preset speed; if the entry deviation amount is ... The quantity threshold is reached, and the strip defect does not exist, the temperature of the pyrometer of the furnace zone heating section P2 of the continuous annealing furnace is controlled to be within a preset first temperature range, the temperature of the pyrometer of the furnace zone heating section P3 of the continuous annealing furnace is controlled to be within a preset second temperature range, the furnace zone hourly output of the continuous annealing furnace is controlled to be less than the preset output threshold, and the tension of the target strip in the continuous annealing furnace heating section one and the continuous annealing furnace heating section two is increased, the lower limit value of the second temperature range is greater than the upper limit value of the first temperature range; the preset deviation threshold value is 70mm, and the preset speed is 220m / min.

2. The strip deviation control method of the cold rolling and annealing production line according to claim 1 is characterized in that: The first temperature range is 500°C to 600°C, the second temperature range is 730°C to 750°C, and the preset output threshold is 150t / h.

3. The strip deviation control method of the cold rolling and annealing production line according to claim 1 is characterized in that: Also includes: If the production plan of the cold rolling annealing production line is greater than the preset coil number threshold, a group of thermal crown fans of the continuous annealing furnace are controlled to be in working state, and the power output value of the group of thermal crown fans is controlled to be within a preset percentage range.

4. The strip deviation control method of the cold rolling and annealing production line according to claim 3 is characterized in that: The preset roll number threshold is 20 rolls, the group of thermal crowning fans includes thermal crowning fan No. 1, thermal crowning fan No. 2 and thermal crowning fan No. 3 of the continuous annealing furnace, and the preset percentage range is 30% to 50%.

5. A strip deviation control device for a cold rolling and annealing production line, characterized in that: The cold rolling and annealing production line includes an inlet looper and a continuous annealing furnace, and the device includes: A first acquisition unit is used to acquire the actual width of the target steel strip when the cold rolling and annealing production line is producing steel strip; The second acquisition unit is used to acquire the entrance deviation amount of the target strip at the entrance loop and the strip defects of the target strip if the actual width is less than the preset width; the preset width is 1250mm; the actual width is less than the preset width, indicating that the target strip is a narrow strip; A production control unit, used for controlling the strip production process of the cold rolling and continuous annealing production line based on the entry deviation amount and the strip defect, so as to reduce the deviation amount of the target strip in the cold rolling and continuous annealing production line; wherein, the control of the strip production process of the cold rolling and continuous annealing production line based on the entry deviation amount and the strip defect includes: if the entry deviation amount is greater than a preset deviation amount threshold, controlling the running speed of the target strip to be less than a preset speed; if the strip defect is a wave defect or a sickle bend defect, reducing the speed and increasing the tension of the target strip; if the entry deviation amount is not greater than A deviation threshold is preset, and the strip defect does not exist, the temperature of the pyrometer of the P2 heating section of the continuous annealing furnace is controlled to be within a preset first temperature range, the temperature of the pyrometer of the P3 heating section of the continuous annealing furnace is controlled to be within a preset second temperature range, the hourly output of the furnace zone of the continuous annealing furnace is controlled to be less than the preset output threshold, and the tension of the target strip in the first heating section and the second heating section of the continuous annealing furnace is increased, and the lower limit value of the second temperature range is greater than the upper limit value of the first temperature range; the preset deviation threshold is 70 mm, and the preset speed is 220 m / min.

6. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 4 when executing the computer program.

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