A steel coil roll type quality improvement control method and device

Abstract

The application relates to the technical field of hot continuous rolling, and provides a steel coil shape quality improvement control method and device, which comprises the following steps: obtaining a current steel strip control thickness and a preset coiling side guide plate opening degree; according to the strip control thickness, a coiling side guide plate opening degree adjustment amount of the strip at different preset positions is called; when the strip head reaches each preset position, the side guide plate opening degree of each preset position is adjusted according to the coiling side guide plate opening degree adjustment amount and the preset coiling side guide plate opening degree, so that the steel coil shape after the strip passes through the coiling drum meets preset requirements. In the application, the coiling side guide plate opening degree can be classified and adjusted according to the strip control thickness, so as to avoid the quality defect problems of the head tower shape and the tail overflow edge in the coiling process caused by the head deviation or the poor strip shape of part of the thin strip; through the adjustment of the coiling side guide plate opening degree of each preset position, the steel coil shape quality can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hot continuous rolling, in particular to a steel coil shape quality improvement control method and device. BACKGROUND

[0002] The main function of the coiler side guide plate of the hot continuous rolling production line is to ensure that the strip entering the coiler can be wound neatly on the winding drum without drifting left and right, so as to ensure that the steel coil shape is controlled and reduce the coil shape quality defects such as head tower shape and tail overflow edge.

[0003] The existing coiler side guide plate opening degree control of the hot coil production line of the rolling mill mainly adopts a control mode combining position ring and pressure ring. After the coiler side guide plate is preset to bite the steel coil of the finishing mill F1 rack, the coiler side guide plate is controlled by the position ring, that is, the opening degree of the side guide plate reaches the preset opening degree position. After the head of the strip passes through the side guide plate and enters the winding drum to bite the steel coil (the winding drum bite signal arrives), the control is automatically switched to the pressure ring, that is, the side guide plate is controlled by the constant pressure ring throughout the process. When the actual pressure of the side guide plate is less than the preset pressure, the opening degree of the side guide plate is automatically closed to reach the preset pressure. When the actual pressure of the side guide plate is greater than the preset pressure, the opening degree of the side guide plate is automatically opened to reach the preset pressure.

[0004] In actual production process, due to the reasons such as head deviation and poor shape of part of thin gauge strip, the coil shape quality defects such as head tower shape and tail overflow edge often occur during the winding process of thin gauge strip, which needs to be rewound by the upper leveling and dividing unit, affecting the winding control and rolling stability of the strip, and also increasing the fixed cost of ton steel.

[0005] In the existing coiler side guide plate opening degree control method, the opening degree of the side guide plate during the winding process of the strip cannot be controlled in real time and accurately, resulting in poor coil shape quality of part of the specifications. SUMMARY

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a steel coil shape quality improvement control method and device, which is used to solve the problem that the existing control technology cannot control the opening degree of the side guide plate during the winding process of the strip in real time and accurately, resulting in poor coil shape quality of part of the specifications.

[0007] To achieve the above-mentioned purpose and other related purposes, the present application provides a steel coil shape quality improvement control method, which comprises:

[0008] Obtaining the current strip control thickness and the preset coiler side guide plate opening degree;

[0009] According to the strip control thickness, the coiler side guide plate opening degree adjustment amount of the strip at different preset positions is called;

[0010] When the strip head reaches each of the preset positions, the opening degree of the side guide plate is pre-adjusted according to the preset coiling side guide plate opening degree and the coiling side guide plate opening degree adjustment amount, so that the coil shape after the strip is coiled on the reel meets the preset coil shape quality requirement.

[0011] In an embodiment of the present application, the coiling side guide plate opening degree adjustment amount of the strip at different preset positions is called according to the controlled thickness of the strip, including:

[0012] If the controlled thickness of the strip is less than or equal to the preset thickness threshold, the strip is determined to be a thin strip, and the coiling side guide plate opening degree adjustment amount of the thin strip at different preset positions is called;

[0013] If the controlled thickness of the strip is greater than the preset thickness threshold, the strip is determined to be a thick strip, and the coiling side guide plate opening degree adjustment amount of the thick strip at different preset positions is called; wherein the different preset positions include a side guide plate middle position, a side guide plate tail position, and a pinch roll position.

[0014] In an embodiment of the present application, the opening degree of the side guide plate is pre-adjusted according to the coiling side guide plate opening degree adjustment amount and the preset coiling side guide plate opening degree, including:

[0015] According to the coiling side guide plate opening degree adjustment amount of the thin strip at different preset positions, the preset coiling side guide plate opening degree is adjusted to obtain a coiling side guide plate target opening degree of the thin strip at different preset positions;

[0016] According to the coiling side guide plate target opening degree, the coiling side guide plate opening degree of the thin strip at different preset positions is pre-adjusted, so that the side guide plate reaches the coiling side guide plate target opening degree.

[0017] In an embodiment of the present application, the opening degree of the side guide plate is pre-adjusted according to the coiling side guide plate opening degree adjustment amount and the preset coiling side guide plate opening degree, including:

[0018] According to the coiling side guide plate opening degree adjustment amount of the thick strip at different preset positions, the preset coiling side guide plate opening degree is adjusted to obtain a coiling side guide plate target opening degree of the thick strip at different preset positions;

[0019] According to the coiling side guide plate target opening degree, the coiling side guide plate opening degree of the thick strip at different preset positions is pre-adjusted, so that the side guide plate reaches the coiling side guide plate target opening degree.

[0020] In an embodiment of the present application, after the opening degree of the side guide plate is pre-adjusted according to the coiling side guide plate opening degree adjustment amount and the preset coiling side guide plate opening degree, it further includes:

[0021] acquiring an actual pressure of the side guide plate when the pinch roll biting signal is detected;

[0022] adjusting an opening degree of the side guide plate according to the actual pressure.

[0023] In an embodiment of the present application, after the opening degree of the side guide plate is adjusted, the method further comprises:

[0024] if the actual pressure is greater than a preset side guide plate two-side pressure threshold, controlling the side guide plate to open;

[0025] if a change value of the opening degree of the side guide plate when the side guide plate opens is greater than a preset opening degree change threshold, adjusting the opening degree of the side guide plate to the preset coiling side guide plate opening degree.

[0026] In an embodiment of the present application, after the opening degree of the side guide plate is adjusted, the method further comprises:

[0027] if the actual pressure is less than a preset side guide plate two-side pressure threshold, controlling the side guide plate to close;

[0028] if a change value of the opening degree of the side guide plate when the side guide plate closes is greater than a preset opening degree change threshold, adjusting the opening degree of the side guide plate to the preset coiling side guide plate opening degree.

[0029] In an embodiment of the present application, a steel coil coiling quality improvement control device is further provided, and the device comprises:

[0030] a data acquisition module, configured to acquire a current strip steel control thickness and a preset coiling side guide plate opening degree;

[0031] an adjustment amount calling module, configured to call a coiling side guide plate opening degree adjustment amount of the strip steel at different preset positions according to the strip steel control thickness;

[0032] a pre-adjustment module, configured to pre-adjust an opening degree of the side guide plate according to the coiling side guide plate opening degree adjustment amount and the preset coiling side guide plate opening degree when the strip steel head reaches each of the preset positions, so that a steel coil coiling shape after the strip steel is coiled by a coiling drum meets a preset coiling quality requirement.

[0033] The present application has the following beneficial effects:

[0034] The current strip control thickness and preset coiling side guide opening degree are acquired firstly; then the coiling side guide opening degree adjustment amount of the strip at different preset positions is called according to the strip control thickness; when the strip head reaches each preset position, the opening degree of the side guide is pre-adjusted according to the coiling side guide opening degree adjustment amount and the preset coiling side guide opening degree, so that the steel coil shape after the strip is coiled on the winding drum meets the preset coil shape quality requirement. In the application, the coiling side guide opening degree can be classified and adjusted according to the strip control thickness, so as to avoid the steel coil quality defects such as head tower shape and tail overflow edge in the coiling process caused by the head deviation or poor shape of part of the thin strip; through the adjustment of the coiling side guide opening degree at each preset position, the steel coil shape quality can be effectively improved.

[0035] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0036] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application. It is clear that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0037] Figure 1 is a working schematic diagram of a coiler shown in an exemplary embodiment of the present application;

[0038] Figure 2 is a flow schematic diagram of a steel coil shape quality improvement control method shown in an exemplary embodiment of the present application;

[0039] Figure 3 is a block diagram of a steel coil shape quality improvement control device shown in an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described below with reference to the drawings and preferred embodiments, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure in the specification. The present application can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, but not for limiting the protection scope of the present application.

[0041] It is to be noted that the drawings provided in the following embodiments only schematically illustrate the basic concepts of the present application, and only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, number and ratio of the components in actual implementation can be arbitrarily changed, and the layout type of the components can be more complex.

[0042] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the application, however, it is obvious to those skilled in the art that the embodiments of the application can be implemented without these specific details, and in other embodiments, the known structures and devices are shown in the form of block diagrams rather than in the form of details, to avoid making the embodiments of the application difficult to understand.

[0043] First of all, it should be noted that hot continuous rolling is a way of producing steel. Using continuous casting slabs or roughing slabs as raw materials, after heating in a step-by-step heating furnace, high-pressure water is used to remove phosphorus, and then the rough rolling intermediate blank is cut at the head and tail, and then enters the finishing mill, computer-controlled rolling is implemented, and after finishing, it is cooled by laminar flow and coiled by a coiler to become a steel coil. In the daily production process, the head and tail of the steel coil often have a tongue shape and a fish tail shape, and the thickness and width accuracy is poor, and the edge often has wave-shaped, folded edges, tower-shaped and other coil shape quality defects.

[0044] The coiler side guide plate is one of the devices in the coiler set on the hot rolling production line, which ensures that the strip steel is correctly centered and guided into the coiler drum for coiling. The device is composed of 4 guide plates, which are symmetrically arranged on the transmission side and the operation side, among which the long guide plates are installed on the fixed seats on both sides of the roller, forming a horn section, which can stably and effectively center and guide the strip steel. To ensure that the strip steel is correctly centered and guided into the coiler drum for coiling, there must be enough centering force and corresponding pressure grade hydraulic cylinders.

[0045] The hydraulic servo system is used to control the position and pressure of the side guide plate, which has the characteristics of fast dynamic response and high control precision, and can control the opening degree and pressure of the side guide plate in real time during the coiling process of the strip steel, so that the strip steel is stably centered on the rolling center line.

[0046] Referring to Figure 1 , Figure 1 is a working schematic diagram of a coiler shown in an exemplary embodiment of the present application, Figure 1The arrow direction in the figure is the movement direction of the strip head in the coiling process, and the strip is coiled through the side guide plate, pinch roll, reel and other equipment in turn to obtain a coil. In the existing strip coiling process, the strip head is controlled by position ring control before being coiled by the reel, and the opening degree of the side guide plate is set to be larger than the width of the strip, so that the strip can smoothly enter the pinch roll; after the strip head enters the reel and bites the steel, the control is automatically switched to pressure ring control, that is, the side guide plate is controlled by constant pressure throughout the process.

[0047] In actual production process, due to the deviation of the head of part of thin gauge strip and poor plate shape, the following problems are prone to occur:

[0048] When the head of part of thin gauge strip deviates or the plate shape is poor, there is no effective solution for the existing control technology, resulting in the head tower shape and tail overflow edge of thin gauge strip during coiling process.

[0049] The existing side guide plate pressure ring is put into late, which affects the head shape quality control of thin gauge strip;

[0050] After the coiling side guide plate is switched to pressure ring control, the opening degree of the side guide plate is often abnormally opened or closed, resulting in the drift of the strip during coiling process (abnormal opening) or being folded by the pinch, which directly leads to coiling and stacking of steel, seriously affecting the production stability.

[0051] In order to solve the problem of low control precision of part of the existing control technology, the embodiments of the present application respectively propose a steel coil shape quality improvement control method and a steel coil shape quality improvement control device, which will be described in detail below.

[0052] Please refer to Figure 2 , Figure 2 is a flowchart of a steel coil shape quality improvement control method according to an example embodiment of the present application, and the embodiment does not limit the applicable implementation environment of the method.

[0053] As shown in Figure 2 , in an example embodiment, the steel coil shape quality improvement control method at least includes steps S210 to S230, which are described in detail as follows:

[0054] In step S210, the current strip control thickness and the preset coiling side guide plate opening degree are obtained.

[0055] Exemplarily, the preset coiling side guide opening degree in the embodiment of the present application may be, for example, a second-level preset side guide opening degree. When the finishing F1 rack bites the steel, the second-level model preset calculates the coiler side guide opening degree, and the second-level preset side guide opening degree in the embodiment of the present application may be, for example, 1562.7 mm; after the side guide opening degree is set and issued, the controlled thickness of the strip steel is obtained.

[0056] In step S220, according to the controlled thickness of the strip steel, the adjustment amount of the coiling side guide opening degree of the strip steel at different preset positions is called.

[0057] Exemplarily, the strip steel types may be divided into thin strip steel and thick strip steel. After the strip steel is classified according to the controlled thickness, the adjustment amount of the coiling side guide opening degree of the thin strip steel or the thick strip steel at different preset positions is called. The different preset positions in the embodiment of the present application include the middle position of the side guide, the tail position of the side guide, and the pinch roll position. The preset coiling side guide opening degree of the different preset positions is adjusted through the adjustment amount of the coiling side guide opening degree, and then the position ring closed-loop control is performed according to the adjusted side guide opening degree, so as to improve the coil shape quality of the steel coil and avoid the problems of the head tower shape and the tail overflow edge in the coiling process caused by the head deviation or the poor shape of the partial thin specification strip steel.

[0058] In step S230, when the head of the strip steel reaches each preset position, the opening degree of the side guide is pre-adjusted according to the adjustment amount of the coiling side guide opening degree and the preset coiling side guide opening degree, so that the coil shape of the steel coil after the strip steel is coiled on the winding drum meets the preset coil shape quality requirement.

[0059] Exemplarily, the position ring closed-loop control in the present application is divided into three stages, and each stage corresponds to a position in the coiling process. The first stage position ring closed-loop control corresponds to the time when the head of the strip steel reaches the middle position of the side guide (i.e. the position of the side guide 1 / 2), the second-level preset side guide opening degree is adjusted for the first time according to the adjustment amount of the coiling side guide opening degree, the target coiling side guide opening degree of the middle position of the side guide is obtained, and then the position ring closed-loop control is performed; the second stage position ring closed-loop control corresponds to the time when the head of the strip steel reaches the tail position of the side guide, the second-level preset side guide opening degree is adjusted for the second time according to the adjustment amount of the coiling side guide opening degree, the target coiling side guide opening degree of the tail position of the side guide is obtained, and then the position ring closed-loop control is performed; the third stage position ring closed-loop control corresponds to the time when the head of the strip steel reaches the pinch roll position, the second-level preset side guide opening degree is adjusted for the third time according to the adjustment amount of the coiling side guide opening degree, the target coiling side guide opening degree of the pinch roll position is obtained, and then the position ring closed-loop control is performed. Through the position ring closed-loop control of the coiler side guide opening degree at multiple preset positions, the head coil shape quality of the steel coil is effectively improved until the head of the strip steel passes through the pinch roll position.

[0060] From the steps S210 to S230, the scheme provided in the embodiment can classify and adjust the opening degree of the coiling side guide plate according to the controlled thickness of the strip steel, so as to avoid the quality defects of the steel coil such as the head tower shape in the coiling process and the overflow edge of the tail caused by the head deviation or poor shape of the partial thin strip steel; and by adjusting the opening degree of the coiling side guide plate at each preset position, the shape quality of the steel coil can be effectively improved.

[0061] In an embodiment of the present application, according to the controlled thickness of the strip steel, the opening degree adjustment amount of the coiling side guide plate of the strip steel at different preset positions is called, including:

[0062] If the controlled thickness of the strip steel is less than or equal to the preset thickness threshold, the strip steel is determined as a thin strip steel, and the opening degree adjustment amount of the coiling side guide plate of the thin strip steel at different preset positions is called;

[0063] If the controlled thickness of the strip steel is greater than the preset thickness threshold, the strip steel is determined as a thick strip steel, and the opening degree adjustment amount of the coiling side guide plate of the thick strip steel at different preset positions is called; wherein the different preset positions include a middle position of the side guide plate, a tail position of the side guide plate, and a pinch roll position.

[0064] In an embodiment of the present application, the opening degree of the side guide plate is pre-adjusted according to the opening degree adjustment amount of the coiling side guide plate and the preset opening degree of the coiling side guide plate, including:

[0065] According to the opening degree adjustment amount of the coiling side guide plate of the thin strip steel at different preset positions, the preset opening degree of the coiling side guide plate is adjusted to obtain the target opening degree of the coiling side guide plate of the thin strip steel at different preset positions;

[0066] According to the target opening degree of the coiling side guide plate, the opening degree of the coiling side guide plate of the thin strip steel at different preset positions is pre-adjusted, so that the side guide plate reaches the target opening degree of the coiling side guide plate.

[0067] For example, when the controlled thickness of the strip steel is less than or equal to 3.5 mm, the strip steel is a thin strip steel; and when the controlled thickness of the strip steel is greater than 3.5 mm, the strip steel is a thick strip steel.

[0068] When the thin strip head reaches the middle position of the side guide plate, the opening adjustment amount of the coiling side guide plate is 22.5 mm, and on the basis of the second preset side guide plate opening, each side is compressed by 22.5 mm. For example, if the controlled width of the rolled thin strip is 1510 mm, and the second preset side guide plate opening is 1562.7 mm, then the target opening of the coiling side guide plate at the middle position of the side guide plate is 1517.7 mm. When the thin strip head reaches the tail position of the side guide plate, the opening adjustment amount of the coiling side guide plate is 15 mm, and on the basis of the second preset side guide plate opening, each side is compressed by 15 mm. For example, if the controlled width of the rolled thin strip is 1510 mm, and the second preset side guide plate opening is 1562.7 mm, then the target opening of the coiling side guide plate at the tail position of the side guide plate is 1532.7 mm. When the thin strip head reaches the pinch roll position, the opening adjustment amount of the coiling side guide plate is 10 mm, and on the basis of the second preset side guide plate opening, each side is compressed by 10 mm. For example, if the controlled width of the rolled thin strip is 1510 mm, and the second preset side guide plate opening is 1562.7 mm, then the target opening of the coiling side guide plate at the pinch roll position is 1542.7 mm. After obtaining the target opening of the coiling side guide plate of the thin strip at different preset positions, the current opening of the side guide plate when the thin strip head reaches different preset positions is obtained, and the position ring closed loop control of the side guide plate opening is performed according to the target opening and the current opening of the coiling side guide plate. The above position ring closed loop control mode can effectively avoid the problems of head tower shape and tail overflow edge and other coil shape quality defects in the coiling process caused by the head deviation or poor strip shape of part of the thin strip.

[0069] In an embodiment of the present application, the opening of the side guide plate is pre-adjusted according to the opening adjustment amount of the coiling side guide plate and the preset coiling side guide plate opening, comprising:

[0070] According to the opening adjustment amount of the coiling side guide plate of the thick strip at different preset positions, the preset coiling side guide plate opening is adjusted to obtain the target opening of the coiling side guide plate of the thick strip at different preset positions;

[0071] According to the target opening of the coiling side guide plate, the opening of the coiling side guide plate of the thick strip at different preset positions is pre-adjusted to make the side guide plate reach the target opening of the coiling side guide plate.

[0072] For example, when the head of the thick strip reaches the middle position of the side guide plate, the opening adjustment amount of the coiling side guide plate is 20 mm, and on the basis of the second preset side guide plate opening, each side is compressed by 20 mm. For example, the controlled width of the rolled thick strip is 1510 mm, and the second preset side guide plate opening is 1562.7 mm, so that the target opening of the coiling side guide plate at the middle position of the side guide plate is 1522.7 mm. When the head of the thick strip reaches the tail position of the side guide plate, the opening adjustment amount of the coiling side guide plate is 12.5 mm, and on the basis of the second preset side guide plate opening, each side is compressed by 12.5 mm. For example, the controlled width of the rolled thick strip is 1510 mm, and the second preset side guide plate opening is 1562.7 mm, so that the target opening of the coiling side guide plate at the tail position of the side guide plate is 1537.7 mm. When the head of the thick strip reaches the position of the pinch roll, the opening adjustment amount of the coiling side guide plate is 7.5 mm, and on the basis of the second preset side guide plate opening, each side is compressed by 7.5 mm. For example, the controlled width of the rolled thick strip is 1510 mm, and the second preset side guide plate opening is 1562.7 mm, so that the target opening of the coiling side guide plate at the position of the pinch roll is 1547.7 mm. After obtaining the target opening of the coiling side guide plate of the thick strip at different preset positions, the current opening of the side guide plate when the head of the thick strip reaches different preset positions is obtained, and the position ring closed loop control of the opening of the side guide plate is performed according to the target opening and the current opening of the coiling side guide plate. The above-mentioned position ring closed loop control mode can effectively avoid the problems of head tower shape and tail overflow edge and other coil shape quality defects in the coiling process caused by the head deviation or poor plate shape of part of the strip.

[0073] In an embodiment of the present application, after the opening of the side guide plate is pre-adjusted according to the opening adjustment amount of the coiling side guide plate and the preset coiling side guide plate opening, the method further comprises:

[0074] When the pinch roll steel biting signal is detected, the actual pressure of the side guide plate is obtained;

[0075] According to the actual pressure, the opening of the side guide plate is adjusted.

[0076] For example, in order to ensure that the head of the strip is controlled and the coiling side guide plate pressure ring is optimized, the pressure ring control is put into operation in advance after the head of the strip passes through the side guide plate smoothly, and the coiling side guide plate pressure ring is optimized from the coiling drum steel biting to the pinch roll steel biting (the pinch roll steel signal arrives). That is, when the pinch roll steel biting signal is detected, the actual pressure of the side guide plate on both sides is obtained, and the opening of the side guide plate is controlled by the pressure ring according to the actual pressure, which can further improve the coil shape quality.

[0077] It should be noted that in the actual coiling process of the strip steel, when the side guide plate pressure is insufficient due to insufficient hydraulic pressure, cylinder seal damage, etc., and the action stroke is insufficient, the actual opening degree change value of the side guide plate opening degree pressure ring when the pressure ring is put in is often greater than the abnormal opening degree threshold value, the side guide plate is abnormally opened or closed, which causes the strip steel to drift back and forth on both sides (abnormal opening) or be folded and stacked (abnormal closing) during coiling. In view of similar fault problems, when the side guide plate pressure ring control is abnormal, the position ring closed-loop control is automatically switched back to ensure that the side guide plate opening degree control is normal and the strip steel coiling is stable.

[0078] In an embodiment of the present application, after adjusting the opening degree of the side guide plate, further comprising:

[0079] If the actual pressure is greater than the preset side guide plate two-side pressure threshold value, the side guide plate is controlled to open;

[0080] When the opening degree change value of the side guide plate opening is greater than the preset opening degree change threshold value, the opening degree of the side guide plate is adjusted to the preset coiling side guide plate opening degree.

[0081] In an embodiment of the present application, after adjusting the opening degree of the side guide plate, further comprising:

[0082] If the actual pressure is less than the preset side guide plate two-side pressure threshold value, the side guide plate is controlled to close;

[0083] When the opening degree change value of the side guide plate opening is greater than the preset opening degree change threshold value, the opening degree of the side guide plate is adjusted to the preset coiling side guide plate opening degree.

[0084] For example, during the side guide plate pressure ring input process of thin strip steel, the preset opening degree change threshold value is 25 mm. If the opening exceeds 25 mm or the closing exceeds 25 mm during the side guide plate opening degree pressure ring control process, the position ring closed-loop control is automatically switched back, that is, the position ring closed-loop control is switched to the second preset side guide plate opening degree. For example, for SPHC steel with a rolling specification of 3.02 mm*1510 mm, the side guide plate two-side pressure threshold value is preset to 8 KN. After the pressure ring is put in, the constant pressure control is automatically switched throughout the process, that is, when the actual pressure of the side guide plate is greater than the preset side guide plate two-side pressure threshold value, the side guide plate is automatically opened, and when the opening degree change value of the side guide plate automatically opened exceeds 25 mm, the side guide plate opening degree is automatically switched back to 1562.7 mm position ring closed-loop control throughout the process; when the actual pressure of the side guide plate is less than the preset side guide plate two-side pressure threshold value, the side guide plate is automatically closed, and when the opening degree change value of the side guide plate automatically closed exceeds 25 mm, the side guide plate opening degree is automatically switched back to 1562.7 mm position ring closed-loop control throughout the process, to ensure that the side guide plate opening degree control is normal and the strip steel coiling is stable.

[0085] For example, during the side guide pressure ring input process for thick strip steel, the preset opening degree change threshold is 30 mm. If the side guide opening degree pressure ring control process is opened more than 30 mm or closed more than 30 mm, it is automatically switched back to position ring closed loop control, that is, switched to the secondary preset side guide opening degree for position ring closed loop control. For example, for Q235B steel with a rolling specification of 7.39 mm*1510 mm, the side guide two-side pressure threshold is preset to 18 KN. After the pressure ring is input, it is automatically switched to constant pressure control throughout the process, that is: when the actual pressure of the side guide is greater than the preset side guide two-side pressure threshold, the side guide is automatically opened. When the opening degree change value of the automatically opened side guide exceeds 30 mm, the side guide opening degree is automatically switched back to 1562.7 mm position ring closed loop control throughout the process. When the actual pressure of the side guide is less than the preset side guide two-side pressure threshold, the side guide is automatically closed. When the opening degree change value of the automatically closed side guide exceeds 30 mm, the side guide opening degree is automatically switched back to 1562.7 mm position ring closed loop control throughout the process, to ensure that the side guide opening degree control is normal and to ensure that the strip steel coiling is stable.

[0086] Figure 3 is a block diagram of a steel coil coiling quality improvement control device according to an example embodiment of the present application. The present embodiment does not limit the implementation environment to which the device is applied.

[0087] As shown in Figure 3 , the example steel coil coiling quality improvement control device includes:

[0088] A data acquisition module 301 is configured to acquire a current strip steel control thickness and a preset coiling side guide opening degree.

[0089] An adjustment amount calling module 302 is configured to call a coiling side guide opening degree adjustment amount of the strip steel at different preset positions according to the strip steel control thickness.

[0090] A pre-adjustment module 303 is configured to pre-adjust the opening degree of the side guide according to the coiling side guide opening degree adjustment amount and the preset coiling side guide opening degree when the head of the strip steel reaches each of the preset positions, so that the steel coil coiling after the strip steel passes through the coiling drum meets the preset coiling quality requirement.

[0091] In the example steel coil coiling quality improvement control device, the coiling side guide opening degree can be classified and adjusted according to the strip steel control thickness, to avoid some thin strip steel from causing steel coil quality defects such as head tower shape and tail overflow edge during the coiling process due to head deviation or poor strip shape. Through the adjustment of the coiling side guide opening degree at each preset position, the steel coil coiling quality can be effectively improved.

[0092] It should be noted that the steel coil shape quality improvement control device provided by the above-mentioned embodiments and the steel coil shape quality improvement control method provided by the above-mentioned embodiments belong to the same concept, wherein the specific manner in which each module and unit performs operations has been described in detail in the method embodiments, and will not be described here. The steel coil shape quality improvement control device provided by the above-mentioned embodiments can complete the above-described functions by different functional modules according to the actual application, that is, the internal structure of the device is divided into different functional modules to complete all or part of the above-described functions, and this is not limited here.

[0093] The above-mentioned embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A method for improving and controlling the quality of steel coils, characterized in that, The method includes: Obtain the current strip control thickness and the preset opening degree of the coiling side guide plate; Based on the controlled thickness of the strip, the adjustment amount of the opening of the coiling side guide plate at different preset positions is called, including: If the controlled thickness of the strip is less than or equal to the preset thickness threshold, the strip is determined to be a thin strip, and the opening adjustment amount of the coiling side guide plate at different preset positions is called. If the controlled thickness of the strip is greater than the preset thickness threshold, the strip is determined to be a thick strip, and the opening adjustment amount of the coiling side guide plate at different preset positions is called; wherein, the different preset positions include the middle position of the side guide plate, the tail position of the side guide plate, and the position of the pinch roll; When the strip head reaches each of the preset positions, the opening of the side guide plate is pre-adjusted according to the opening adjustment amount of the winding side guide plate and the preset opening of the winding side guide plate, so that the coil shape of the strip after being wound by the drum meets the preset coil shape quality requirements, including: Based on the adjustment amount of the opening degree of the coiling side guide plate at different preset positions of the thin strip steel, the preset opening degree of the coiling side guide plate is adjusted to obtain the target opening degree of the coiling side guide plate at different preset positions of the thin strip steel; based on the target opening degree of the coiling side guide plate, the opening degree of the coiling side guide plate at different preset positions is pre-adjusted so that the side guide plate reaches the target opening degree of the coiling side guide plate. Based on the adjustment amount of the opening degree of the coiling side guide plate at different preset positions of the thick strip steel, the preset opening degree of the coiling side guide plate is adjusted to obtain the target opening degree of the coiling side guide plate at different preset positions of the thick strip steel; based on the target opening degree of the coiling side guide plate, the opening degree of the coiling side guide plate at different preset positions of the thick strip steel is pre-adjusted so that the side guide plate reaches the target opening degree of the coiling side guide plate. When a bite signal is detected from the pinch roll, the actual pressure of the side guide plate is obtained; the opening degree of the side guide plate is adjusted according to the actual pressure. If the actual pressure is greater than the preset pressure threshold on both sides of the side guide plate, the side guide plate is controlled to open; when the change value of the opening degree of the side guide plate is greater than the preset opening degree change threshold, the opening degree of the side guide plate is adjusted to the preset winding side guide plate opening degree. If the actual pressure is less than the preset pressure threshold on both sides of the side guide plate, the side guide plate is controlled to close; when the change in the opening of the closed side guide plate is greater than the preset opening change threshold, the opening of the side guide plate is adjusted to the preset winding side guide plate opening.

Images