CN114959536B - Method and device for controlling thickness of galvanized zinc layer - Google Patents

Method and device for controlling thickness of galvanized zinc layer Download PDF

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Publication number
CN114959536B
CN114959536B CN202210595370.9A CN202210595370A CN114959536B CN 114959536 B CN114959536 B CN 114959536B CN 202210595370 A CN202210595370 A CN 202210595370A CN 114959536 B CN114959536 B CN 114959536B
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current
target
zinc
zinc layer
thickness
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CN114959536A (en
Inventor
刘醒
任新意
王振鹏
张旭亮
刘丽
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Shougang Jingtang United Iron and Steel Co Ltd
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Shougang Jingtang United Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • C23C2/20—Strips; Plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)

Abstract

The invention discloses a method and a device for controlling the thickness of a galvanized zinc layer, wherein the method comprises the following steps: obtaining a zinc layer database for controlling the thickness of a galvanized zinc layer; obtaining the target zinc layer thickness and the current traction speed of the current strip steel; obtaining current control parameters of the current strip steel zinc coating according to the zinc layer database, the target zinc layer thickness and the current traction speed; and controlling the zinc coating to the current strip steel according to the current control parameters. The control method controls the galvanized layer to the current strip steel, does not need manual intervention in the adjustment process of control parameters, avoids the influence caused by possible misoperation, improves the uniformity of the thickness of the plating layer, effectively reduces the abnormal loss of a zinc ingot, and further realizes the accurate control of the thickness of the galvanized layer in the strip steel production.

Description

Method and device for controlling thickness of galvanized zinc layer
Technical Field
The application relates to the technical field of zinc layer thickness control in steel rolling production, in particular to a method and a device for controlling the thickness of a galvanized zinc layer.
Background
The control of the thickness of the galvanized zinc layer is realized by manually setting parameters of an air knife above the zinc pot by an operator, and the parameters of the air knife which need to be changed include air knife pressure, air knife height, air knife distance and the like. Because the specification change of the strip steel and the speed change of the galvanization production line can all have influence on the thickness of the zinc layer, operators are required to continuously and manually modify parameters according to actual production conditions in the production at present, and the workload of the operators is greatly increased.
The manual operation requires operators to grasp the time point of parameter switching, and the switching can lead to the improvement of production cost and the fluctuation of strip steel product performance, and the uncertainty is increased by the pure manual control, so that the quality problem caused by misoperation can occur.
Therefore, how to realize the accurate control of the thickness of the galvanized zinc layer in the strip steel production is a technical problem to be solved urgently at present.
Disclosure of Invention
The method and the device for controlling the thickness of the galvanized zinc layer realize the accurate control of the thickness of the galvanized zinc layer in the strip steel production.
The embodiment of the invention provides the following scheme:
in a first aspect, an embodiment of the present invention provides a method for controlling a thickness of a galvanized zinc layer, the method including:
obtaining a zinc layer database for controlling the thickness of a galvanized zinc layer;
Obtaining the target zinc layer thickness and the current traction speed of the current strip steel;
obtaining current control parameters of the current strip steel zinc coating according to the zinc layer database, the target zinc layer thickness and the current traction speed;
and controlling the zinc coating to the current strip steel according to the current control parameters.
In an alternative embodiment, the obtaining a zinc layer database controlling the thickness of the galvanized zinc layer includes:
Acquiring a database template and historical setting data of a historical strip steel zinc coating layer;
and obtaining the zinc layer database according to the database template and the history setting data.
In an alternative embodiment, the obtaining the current control parameters of the current strip steel zinc coating layer according to the zinc layer database, the target zinc layer thickness and the current traction speed includes:
Obtaining a target information column in the zinc layer database according to the zinc layer thickness information of the zinc layer database and the target zinc layer thickness;
And obtaining the current control parameters according to the strip steel speed information of the target information field and the current traction speed.
In an alternative embodiment, before controlling the zinc coating to the current strip steel according to the current control parameters, the method further comprises:
acquiring the thickness of a historical zinc layer of the historical strip steel and historical control parameters;
obtaining a current comparison result of the zinc layer thickness according to the historical zinc layer thickness and the target zinc layer thickness;
And updating the historical control parameters into the current control parameters according to the current comparison result.
In an optional embodiment, the updating the historical control parameter to the current control parameter according to the current comparison result includes:
If the thickness of the target zinc layer in the current comparison result is smaller than the thickness of the historical zinc layer, updating the historical control parameter to be the current control parameter after the plating of the zinc layer is completed on the historical strip steel;
If the thickness of the target zinc layer in the current comparison result is larger than the thickness of the historical zinc layer, updating the historical control parameter to be the current control parameter before the plating of the zinc layer of the historical strip steel is completed.
In an alternative embodiment, said controlling the galvanization layer to the current strip steel according to the current control parameters comprises:
obtaining target air pressure, target height and target distance in the current control parameters, wherein the target height is the vertical height between an air knife and a zinc pot, and the target distance is the linear distance between the current strip steel and the air knife along the blowing direction;
And controlling the air knife to move to the target height and the target distance, and blowing the surface of the current strip steel with the target air pressure after the current strip steel is galvanized by the zinc pot.
In an alternative embodiment, the current control parameters are stored in the zinc layer database with interval values, and the obtaining the target air pressure, the target height and the target distance in the current control parameters includes:
acquiring a fitting relation between the traction speed and the air pressure of the air knife;
obtaining the target air pressure according to the current traction speed and the fitting relation;
obtaining a target speed interval according to the current traction speed and the zinc layer database;
And obtaining the target height and the target distance according to the endpoint value of the corresponding preset control parameter of the target speed interval.
In a second aspect, the present invention further provides a device for controlling the thickness of a galvanized zinc layer, the device comprising:
The first acquisition module is used for acquiring a zinc layer database for controlling the thickness of the galvanized zinc layer;
The second acquisition module is used for acquiring the target zinc layer thickness and the current traction speed of the current strip steel;
the first obtaining module is used for obtaining current control parameters of the current strip steel zinc coating layer according to the zinc layer database, the target zinc layer thickness and the current traction speed;
And the first control module is used for controlling the zinc coating to the current strip steel according to the current control parameters.
In an alternative embodiment, the first obtaining module includes:
the first acquisition submodule is used for acquiring a database template and historical setting data of a historical strip steel zinc coating layer;
and the first obtaining submodule is used for obtaining the zinc layer database according to the database template and the history setting data.
In an alternative embodiment, the first obtaining module includes:
The second obtaining submodule is used for obtaining a target information column in the zinc layer database according to the zinc layer thickness information of the zinc layer database and the target zinc layer thickness;
and the third obtaining submodule is used for obtaining the current control parameters according to the strip steel speed information of the target information field and the current traction speed.
In an alternative embodiment, the apparatus further comprises:
the second acquisition module is used for acquiring the historical zinc layer thickness and the historical control parameters of the historical strip steel;
the second obtaining module is used for obtaining the current comparison result of the zinc layer thickness according to the historical zinc layer thickness and the target zinc layer thickness;
And the first updating module is used for updating the historical control parameters into the current control parameters according to the current comparison result.
In an alternative embodiment, the first updating module includes:
The first updating sub-module is used for updating the historical control parameters into the current control parameters after the historical strip steel finishes plating of the zinc layer when the thickness of the target zinc layer is smaller than the thickness of the historical zinc layer in the current comparison result;
and the second updating sub-module is used for updating the historical control parameters into the current control parameters before the historical strip steel finishes the zinc layer plating when the target zinc layer thickness is larger than the historical zinc layer thickness in the current comparison result.
In an alternative embodiment, the first control module includes:
the second acquisition submodule is used for acquiring target air pressure, target height and target distance in the current control parameters, wherein the target height is the vertical height between the air knife and the zinc pot, and the target distance is the linear distance between the current strip steel and the air knife along the blowing direction;
and the control submodule is used for controlling the air knife to move to the target height and the target distance, and blowing the surface of the current strip steel with the target air pressure after the current strip steel is galvanized by the zinc pot.
In an alternative embodiment, the current control parameter is stored in the zinc layer database with an interval value, and the second obtaining sub-module includes:
the first acquisition unit is used for acquiring a fitting relation between the traction speed and the air pressure of the air knife;
The first obtaining unit is used for obtaining the target air pressure according to the current traction speed and the fitting relation;
The third obtaining unit is used for obtaining a target speed interval according to the current traction speed and the zinc layer database;
And a fourth obtaining unit, configured to obtain the target height and the target distance according to an endpoint value of the target speed interval corresponding to a preset control parameter.
In a third aspect, the present implementations also provide an electronic device comprising a processor and a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the electronic device to perform the steps of the method of any of the first aspects.
In a fourth aspect, the present implementation further provides a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, implements the steps of the method according to any of the first aspects.
Compared with the prior art, the method and the device for controlling the thickness of the galvanized zinc layer have the following advantages:
According to the invention, the current control parameters of the current strip steel zinc coating are obtained in the zinc layer database through the target zinc layer thickness and the current traction speed of the current strip steel, the zinc coating is controlled to the current strip steel according to the current control parameters, the adjustment process of the control parameters does not need manual intervention, adverse effects caused by errors in the manual operation process are avoided, the uniformity of the zinc coating thickness on the surface of the current strip steel is improved, the abnormal loss of a zinc ingot is effectively reduced, and the accurate control of the zinc coating thickness in strip steel production is further realized.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present description, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for controlling a thickness of a zinc coating according to an embodiment of the present invention;
FIG. 2-1 is a table of control parameters for a target zinc layer thickness of 80 μm in a zinc layer database provided by an embodiment of the present invention;
FIG. 2-2 is a table of control parameters for a target zinc layer thickness of 100 μm in a zinc layer database provided by an embodiment of the present invention;
FIGS. 2-3 are graphs of control parameters for a target zinc layer thickness of 120 μm in a zinc layer database provided by embodiments of the present invention;
FIG. 3 is a schematic diagram illustrating the variation of preset control parameters of an air knife according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a device for controlling the thickness of a zinc coating according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the embodiments of the present invention.
The process of plating zinc layer on strip steel production line includes heating zinc block in zinc pot to form liquid zinc liquid, soaking zinc in the zinc pot to adhere the liquid zinc liquid to the surface of strip steel, blowing the zinc pot below the air knife with the liquid zinc liquid being distributed homogeneously to the outer surface of strip steel, and refluxing the residual liquid zinc liquid to the zinc pot to complete zinc layer plating of strip steel. The control of the zinc layer thickness is mainly controlled by air knife parameters, the existing strip steel production line is controlled by manual adjustment, so that the defect of the accuracy of the zinc layer thickness control in strip steel production is caused, and the embodiment of the invention takes a control system applied to a certain strip steel production line as an example, and specifically describes how to implement the zinc layer thickness control method.
Referring to fig. 1, fig. 1 is a flowchart of a method for controlling a thickness of a zinc coating according to an embodiment of the present invention, where the method includes:
s11, obtaining a zinc layer database for controlling the thickness of the galvanized zinc layer.
Specifically, the zinc layer database can be created based on a MySQL database creation tool (or called a key database management system) on a PC (Personal Computer ), each control parameter in the zinc layer database can be set according to a specific standard parameter of zinc layer plating, and when the drawing speed of the strip steel is rated, the data in the zinc layer database mainly comprise the fitting relation between the zinc layer plating thickness on the strip steel and the blowing air pressure of an air knife, and can be stored in a data curve mode; of course, the parameters can be stored in a form of table data, and the air knife control parameters of the zinc layer thickness can be obtained through a zinc layer database.
In a specific embodiment, a zinc layer database is obtained for controlling the thickness of a galvanized zinc layer, comprising:
Acquiring a database template and historical setting data of a historical strip steel zinc coating layer; and obtaining a zinc layer database according to the database template and the historical setting data.
Specifically, each parameter in the zinc layer database can be stored in a form, the history setting data is verified by the actual application of the strip steel production line, a good practical foundation is provided, the history setting data can be stored according to a specific format through a database template, and the corresponding control parameter can be conveniently and rapidly found out. Referring to fig. 2-1, 2-2 and 2-3, the database template is divided into a plurality of tables according to the difference of the zinc coating thickness, each table corresponds to the zinc coating thickness, and different traction speeds in each table correspond to different air knife control parameters. The corresponding relation between the zinc layer thickness and the traction speed and the air knife control parameters can be recorded through the database template, and meanwhile, the air knife control parameters can be inquired, modified and updated, so that the method has good convenience in operation. After the zinc layer database is acquired, the process proceeds to step S12.
S12, obtaining the target zinc layer thickness and the current traction speed of the current strip steel.
Specifically, the thickness of the target zinc layer is the thickness of the zinc layer to be plated on the current strip steel, and generally, according to the quality requirements of different customers on the strip steel, certain difference exists between the thickness of the target zinc layer of the strip steel with different thicknesses and the thickness of the target zinc layer of the strip steel with different steel grades, and the thickness of the target zinc layer can be issued through a secondary system of a strip steel production line. Because of the difference in the specifications of the strip steel production, the traction speed of the strip steel on the production line also has a certain difference, the current traction speed can be obtained through monitoring by a speed sensor of the strip steel production line, for example, through measuring by an encoder arranged on a conveying roller of the strip steel production line, and the step S13 is carried out after the target zinc layer thickness and the current traction speed are obtained.
S13, obtaining current control parameters of the current strip steel zinc coating according to the zinc layer database, the target zinc layer thickness and the current traction speed.
Specifically, the zinc layer database stores the target zinc layer thickness, the current traction speed and the corresponding air knife control parameters. Therefore, the current control parameters can be obtained by searching a zinc layer database according to the target zinc layer thickness and the current traction speed. For example, the current strip steel has a target zinc layer thickness of 80 mu m, a current traction speed of 70m/min, and the target distance of 8mm, the target air pressure of 180KPa and the target height of 700mm in the current control parameters can be obtained through the table query of the figure 2-1.
In a specific embodiment, the current control parameters of the current strip steel zinc coating layer are obtained according to a zinc layer database, a target zinc layer thickness and a current traction speed, and the method comprises the following steps:
Obtaining a target information column in the zinc layer database according to the zinc layer thickness information of the zinc layer database and the target zinc layer thickness; and obtaining the current control parameters according to the strip steel speed information and the current traction speed of the target information field.
Specifically, the zinc layer database divides the corresponding traction speed and air knife control parameters into a plurality of tables for storage according to the specific zinc layer thickness in the zinc layer thickness information, for example, a control parameter table is divided for the target zinc layer thickness of 80 mu m, and another control parameter table is divided for the target zinc layer thickness of 100 mu m. After the thickness of the target zinc layer of the current strip steel is determined, a corresponding target information field can be quickly searched according to the thickness of the target zinc layer, and then the current control parameters are further searched in the target information field according to the current traction speed. After the current control parameters are acquired, the process proceeds to step S14.
S14, controlling the zinc coating to the current strip steel according to the current control parameters.
Specifically, after the current control parameters are obtained, the air knife can be controlled to control the galvanized layer to the current strip steel according to the current control parameters.
In the concrete implementation, the thickness of the zinc layer plated by the strip steel with different specifications is different due to the variation of the specification and the steel grade of the strip steel rolled by the strip steel production line, so the control method needs to be suitable for the use scene with the variation of the thickness of the zinc layer.
In a specific embodiment, before controlling the zinc coating to the current strip steel according to the current control parameters, the method further comprises:
acquiring the thickness of a historical zinc layer of the historical strip steel and historical control parameters; obtaining a current comparison result of the zinc layer thickness according to the historical zinc layer thickness and the target zinc layer thickness; and updating the historical control parameters into current control parameters according to the current comparison result.
Specifically, the thickness of the zinc layer is used as a zone bit, whether the air knife control parameters of the strip steel production line need to be adjusted or not can be known in real time, and if the current comparison result of the thickness of the historical zinc layer and the thickness of the target zinc layer is the same, the air knife is still controlled by adopting the historical control parameters to execute corresponding blowing actions; if the current comparison results of the historical zinc layer thickness and the target zinc layer thickness are different, updating the historical control parameters to be current control parameters, and adopting the current control parameters to control the air knife to execute new blowing actions.
Because of the characteristics of the air knife, a gradual change process is needed for controlling the air knife to execute corresponding actions through the air knife control parameters, if the control parameters are updated immediately after the specification or the steel grade of the strip steel changes, the zinc layer plating thickness of the current strip steel can not reach the target set value.
In a specific embodiment, updating the historical control parameter to the current control parameter according to the current comparison result includes:
If the thickness of the target zinc layer in the current comparison result is smaller than the thickness of the historical zinc layer, updating the historical control parameters to be current control parameters after the plating of the zinc layer is completed by the historical strip steel; if the thickness of the target zinc layer is larger than the thickness of the historical zinc layer in the current comparison result, updating the historical control parameters to be current control parameters before the plating of the zinc layer is completed by the historical strip steel.
Specifically, the thickness of the target zinc layer is smaller than the thickness of the historical zinc layer, which means that the thickness of the zinc layer plating of the current strip steel is smaller than that of the historical strip steel, and in order to ensure that the tail part of the steel coil of the historical strip steel meets the quality requirement, after the plating of the zinc layer is completed by the historical strip steel, the historical control parameters are updated to be the current control parameters, so that the thickness of the actual zinc layer in the tail part area of the historical strip steel is not smaller, and the customer requirement is met. The thickness of the target zinc layer is larger than that of the historical zinc layer, which means that the thickness of the zinc layer plating of the current strip steel is larger than that of the historical strip steel, and in order to ensure that the thickness of the zinc layer plating of the head area of the current strip steel reaches the quality requirement, before the plating of the zinc layer is completed on the historical strip steel, the historical control parameter is updated to be the current control parameter, so that the thickness of the actual zinc layer in the head area of the current strip steel is not smaller, and as can be understood by a person skilled in the art, the update time of the control parameter is calculated according to the change amount of the control parameter and the change speed, and the final purpose is to realize that the position of the air knife is just completed to change when the current strip steel reaches the air knife, so that the purpose of reducing the loss of the zinc layer can be realized, and the production cost is saved. The updating time can be determined by calibrating the action rate of the air knife, and can also be calculated and determined according to the moving speed and distance of the air knife.
At present, the cost of zinc ingots is 0.0022 ten thousand yuan per kilogram, and 100 kilograms of zinc ingots are consumed per coil of steel, and after the scheme is used, 1 kilogram of zinc ingot is averagely saved per coil of steel, and the production cost is saved by 50 coils per day, wherein the average production number is as follows:
Annual benefit = number of coils produced per day x number of zinc ingots saved per coil of steel x price of zinc ingots x 365 days = 50 coils/day x 1 kg x 0.002 ten thousand yuan/kg x 365 days = 36.5 ten thousand yuan.
In a specific embodiment, controlling the galvanization layer to the current strip steel according to the current control parameters comprises:
Obtaining target air pressure, target height and target distance in current control parameters, wherein the target height is the vertical height between the air knife and the zinc pot, and the target distance is the linear distance between the current strip steel and the air knife along the blowing direction; and controlling the air knife to move to a target height and a target distance, and blowing the surface of the current strip steel with target air pressure after the current strip steel is galvanized by the zinc pot.
Specifically, the movement control of the air knife can be completed through driving of two servo motors, wherein one motor drives the air knife to move along the vertical direction of the zinc pot through a screw transmission structure, and the other motor drives the air knife to linearly move along the blowing direction through the screw transmission structure; the blowing air pressure control of the air knife can be realized by a flow valve, and the flow of compressed air in the air knife is regulated by the flow valve so as to control the air pressure sprayed out of the air knife. After the target air pressure, the target height and the target distance are obtained, the air knife is controlled to move to the target height and the target distance, and after the current strip steel is galvanized by a zinc pot, the surface of the current strip steel is blown by the target air pressure.
In the concrete implementation, the height of the air knife from the zinc pot and the distance from the strip steel are adjusted through motor driving, and if frequent movements cause adverse effects on the service life of the motor.
In a specific embodiment, the current control parameters are stored in a zinc layer database in interval values, and the target air pressure, the target height and the target distance in the current control parameters are obtained, including:
acquiring a fitting relation between the traction speed and the air pressure of the air knife; obtaining target air pressure according to the current traction speed and the fitting relation; obtaining a target speed interval according to the current traction speed and a zinc layer database; and obtaining the target height and the target distance according to the endpoint value of the target speed interval corresponding to the preset control parameter.
Specifically, because the air pressure value of the air knife has a larger influence on the thickness of the galvanized zinc layer of the strip steel, and the air pressure of the air knife can be controlled and regulated through the flow valve, the regulating amplitude can be any value, and the more accurate the air pressure control of the air knife is, the more accurate the corresponding thickness of the galvanized zinc layer is. The fitting relation between the traction speed and the air knife air pressure can be represented by a curve, is usually a linear fitting relation, and further can obtain accurate target air pressure through the current traction speed and the fitting relation. The current control parameters are stored in the zinc layer database in interval values, namely, the stored data are distributed in a punctiform manner, the current traction speed corresponds to a control parameter table in the zinc layer database to find out a target speed interval, and as the corresponding preset control parameters exist in the target speed interval, the target height and the target distance can be determined according to the endpoint values of the preset control parameters, the target height and the target distance can be determined according to the two endpoint values of the target speed interval, which endpoint value is closer, the approaching value is determined to be the target height and the target distance, and frequent actions of driving the air knife moving motor are avoided. Referring to fig. 3, when the thickness of the target zinc layer (or called zinc layer thickness setting) changes, the output air knife air pressure (or air knife pressure value) changes along with the change, wherein the thickness of the target zinc layer is inversely proportional to the air knife air pressure; when the current traction speed (or the actual speed of the production line) changes, the output air pressure of the air knife also changes along with the change, wherein the current traction speed is in direct proportion to the air pressure of the air knife; but the height and distance of the air knife are not changed.
Based on the same inventive concept as the control method, the invention further provides a device for controlling the thickness of a zinc coating, referring to fig. 4, the device comprises:
A first obtaining module 401, configured to obtain a zinc layer database for controlling the thickness of a galvanized zinc layer;
A second obtaining module 402, configured to obtain a target zinc layer thickness and a current traction speed of the current strip steel;
a first obtaining module 403, configured to obtain current control parameters of the current strip steel zinc coating layer according to the zinc layer database, the target zinc layer thickness, and the current traction speed;
A first control module 404, configured to control the galvanization layer to the current strip steel according to the current control parameter.
In an alternative embodiment, the first obtaining module includes:
the first acquisition submodule is used for acquiring a database template and historical setting data of a historical strip steel zinc coating layer;
and the first obtaining submodule is used for obtaining the zinc layer database according to the database template and the history setting data.
In an alternative embodiment, the first obtaining module includes:
The second obtaining submodule is used for obtaining a target information column in the zinc layer database according to the zinc layer thickness information of the zinc layer database and the target zinc layer thickness;
and the third obtaining submodule is used for obtaining the current control parameters according to the strip steel speed information of the target information field and the current traction speed.
In an alternative embodiment, the apparatus further comprises:
the second acquisition module is used for acquiring the historical zinc layer thickness and the historical control parameters of the historical strip steel;
the second obtaining module is used for obtaining the current comparison result of the zinc layer thickness according to the historical zinc layer thickness and the target zinc layer thickness;
And the first updating module is used for updating the historical control parameters into the current control parameters according to the current comparison result.
In an alternative embodiment, the first updating module includes:
The first updating sub-module is used for updating the historical control parameters into the current control parameters after the historical strip steel finishes plating of the zinc layer when the thickness of the target zinc layer is smaller than the thickness of the historical zinc layer in the current comparison result;
and the second updating sub-module is used for updating the historical control parameters into the current control parameters before the historical strip steel finishes the zinc layer plating when the target zinc layer thickness is larger than the historical zinc layer thickness in the current comparison result.
In an alternative embodiment, the first control module includes:
the second acquisition submodule is used for acquiring target air pressure, target height and target distance in the current control parameters, wherein the target height is the vertical height between the air knife and the zinc pot, and the target distance is the linear distance between the current strip steel and the air knife along the blowing direction;
and the control submodule is used for controlling the air knife to move to the target height and the target distance, and blowing the surface of the current strip steel with the target air pressure after the current strip steel is galvanized by the zinc pot.
In an alternative embodiment, the current control parameter is stored in the zinc layer database with an interval value, and the second obtaining sub-module includes:
the first acquisition unit is used for acquiring a fitting relation between the traction speed and the air pressure of the air knife;
The first obtaining unit is used for obtaining the target air pressure according to the current traction speed and the fitting relation;
The third obtaining unit is used for obtaining a target speed interval according to the current traction speed and the zinc layer database;
And a fourth obtaining unit, configured to obtain the target height and the target distance according to an endpoint value of the target speed interval corresponding to a preset control parameter.
Based on the same inventive concept as the control method, the present invention implementation also provides an electronic device comprising a processor and a memory, the memory being coupled to the processor, the memory storing instructions which, when executed by the processor, cause the electronic device to perform the steps of any one of the control methods.
Based on the same inventive concept as the control method, a computer-readable storage medium has stored thereon a computer program, characterized in that the program, when executed by a processor, realizes the steps of any one of the control methods.
The technical scheme provided by the embodiment of the invention has at least the following technical effects or advantages:
1. The current control parameters of the current strip steel zinc coating layer are obtained in a zinc layer database through the target zinc layer thickness and the current traction speed of the current strip steel, the zinc coating layer is controlled to the current strip steel according to the current control parameters, the adjustment process of the control parameters does not need manual intervention, adverse effects caused by errors in the manual operation process are avoided, the uniformity of the zinc coating layer thickness on the surface of the current strip steel is improved, the abnormal loss of a zinc ingot is effectively reduced, and the accurate control of the zinc coating layer thickness in strip steel production is further realized.
2. By means of the air knife parameter changes of the historical steel coil and the current steel coil, optimal parameter switching time is calculated, and on the premise that the strip steel zinc layer plating requirement is met, waste of zinc ingots is reduced in the maximum range, and production cost is reduced.
3. The method changes the manual control of the air knife parameters into automatic control, effectively reduces the workload of operators, achieves the purposes of simplifying personnel and reducing labor cost, ensures that post personnel can pay more attention to other quality control points, and is beneficial to product quality improvement and production cost control.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (modules, systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (7)

1. A method for controlling the thickness of a zinc-plated layer, the method comprising:
obtaining a zinc layer database for controlling the thickness of a galvanized zinc layer;
Obtaining the target zinc layer thickness and the current traction speed of the current strip steel;
obtaining current control parameters of the current strip steel zinc coating according to the zinc layer database, the target zinc layer thickness and the current traction speed;
Controlling a zinc coating layer to the current strip steel according to the current control parameters;
The zinc layer database for obtaining and controlling the thickness of the galvanized zinc layer comprises the following steps:
acquiring a database template and historical setting data of a historical strip steel zinc coating layer, wherein the historical setting data is data of a strip steel production line verified by practical application;
obtaining the zinc layer database according to the database template and the history setting data;
and controlling the zinc coating to the current strip steel according to the current control parameters, wherein the method comprises the following steps of:
obtaining target air pressure, target height and target distance in the current control parameters, wherein the target height is the vertical height between an air knife and a zinc pot, and the target distance is the linear distance between the current strip steel and the air knife along the blowing direction;
Controlling the air knife to move to the target height and the target distance, and blowing the surface of the current strip steel with the target air pressure after the current strip steel is galvanized by the zinc pot;
the current control parameters are stored in the zinc layer database in interval values, and the obtaining of the target air pressure, the target height and the target distance in the current control parameters comprises the following steps:
acquiring a fitting relation between a traction speed and air pressure of an air knife, wherein the fitting relation is a curve of the traction speed changing along with the air pressure of the air knife;
obtaining the target air pressure according to the current traction speed and the fitting relation;
obtaining a target speed interval according to the current traction speed and the zinc layer database;
And obtaining the target height and the target distance according to the end point value of the target speed interval corresponding to the preset control parameter, wherein the target height and the target distance are determined according to the two end point values of the target speed interval, which are close to the target speed interval, and the height and the distance corresponding to the close end point values are respectively determined as the target height and the target distance so as to avoid frequent actions of driving the air knife moving motor.
2. The method of claim 1, wherein the obtaining current control parameters of the current strip steel zinc coating according to the zinc coating database, the target zinc coating thickness, and the current traction speed comprises:
Obtaining a target information column in the zinc layer database according to the zinc layer thickness information of the zinc layer database and the target zinc layer thickness;
And obtaining the current control parameters according to the strip steel speed information of the target information field and the current traction speed.
3. The method of controlling the thickness of a zinc-plated layer according to claim 1, wherein before controlling the zinc-plated layer to the current strip steel according to the current control parameter, further comprising:
acquiring the thickness of a historical zinc layer of the historical strip steel and historical control parameters;
obtaining a current comparison result of the zinc layer thickness according to the historical zinc layer thickness and the target zinc layer thickness;
And updating the historical control parameters into the current control parameters according to the current comparison result.
4. A method of controlling a zinc-plated layer thickness according to claim 3, wherein the updating the historical control parameter to the current control parameter according to the current comparison result comprises:
If the thickness of the target zinc layer in the current comparison result is smaller than the thickness of the historical zinc layer, updating the historical control parameter to be the current control parameter after the plating of the zinc layer is completed on the historical strip steel;
If the thickness of the target zinc layer in the current comparison result is larger than the thickness of the historical zinc layer, updating the historical control parameter to be the current control parameter before the plating of the zinc layer of the historical strip steel is completed.
5. A device for controlling the thickness of a galvanized zinc layer, characterized in that the device corresponds to the control method according to claims 1-4, and the device comprises:
The first acquisition module is used for acquiring a zinc layer database for controlling the thickness of the galvanized zinc layer;
The second acquisition module is used for acquiring the target zinc layer thickness and the current traction speed of the current strip steel;
the first obtaining module is used for obtaining current control parameters of the current strip steel zinc coating layer according to the zinc layer database, the target zinc layer thickness and the current traction speed;
And the first control module is used for controlling the zinc coating to the current strip steel according to the current control parameters.
6. An electronic device comprising a processor and a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the electronic device to perform the steps of the method of any of claims 1-4.
7. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method according to any one of claims 1-4.
CN202210595370.9A 2022-05-29 2022-05-29 Method and device for controlling thickness of galvanized zinc layer Active CN114959536B (en)

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