CN114472542A - Method, device and equipment for controlling plate shape in production process of hot-rolled strip steel - Google Patents
Method, device and equipment for controlling plate shape in production process of hot-rolled strip steel Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
Abstract
The application discloses a method, a device and equipment for controlling plate shape in the production process of hot-rolled strip steel. The method comprises the following steps: detecting the processing stage of the head and the tail of the intermediate billet of the hot-rolled strip steel in the production process of the hot rolling unit; and when the head and the tail of the intermediate billet of the hot-rolled strip steel are detected to be positioned at the preset positions of the hot rolling unit, controlling a preset frame of a finishing mill to process the hot-rolled strip steel according to preset rolling parameters corresponding to the preset positions of the head and the tail of the hot-rolled strip steel. According to the embodiment of the application, the problem of improving the cooling wave shape in the production process of the hot-rolled strip steel is solved.
Description
Technical Field
The application belongs to the technical field of hot rolled strip steel production, and particularly relates to a method, a device and equipment for controlling a strip shape in a hot rolled strip steel production process.
Background
In the production process of the hot-rolled strip steel, edge waves appear after the hot-rolled strip steel is subjected to laminar cooling due to uneven stress distribution of the hot-rolled strip steel in a finishing mill set and non-uniformity of laminar cooling temperature; particularly, the head and the tail of the hot-rolled strip steel are in a free state due to no tension, the edge waves are serious, the strip shape is not controlled, the subsequent leveling difficulty is increased, the product is degraded or judged to be waste due to the edge wave defect, and the thin-specification yield is low.
In the prior art, when steel mills of the same type at home and abroad produce high-strength thin steel grades, methods such as 'using a crown roller with local edge wave control capability', 'improving cooling uniformity by using a layer cooling edge shielding device', 'improving temperature uniformity of a cross section by using an edge heating device', 'improving edge wave defects by using a high-strength temper mill' and the like are generally adopted.
The method in the prior art has poor universality, is not suitable for all steel grades, and has large equipment investment, large maintenance difficulty and high cost.
Disclosure of Invention
The embodiment of the application provides a method, a device and equipment for controlling the shape of a hot-rolled strip steel in the production process, and can solve the problem of improving the cooling wave shape in the production process of the hot-rolled strip steel.
In a first aspect, an embodiment of the present application provides a method for controlling a strip shape in a hot-rolled strip steel production process, the method including:
detecting the processing stage of the head and the tail of the intermediate billet of the hot-rolled strip steel in the production process of the hot rolling unit;
when the foremost end of the head is detected to be exposed out of the last frame of the finishing mill, adjusting the rolling parameters of a preset frame of the finishing mill according to a first rolling parameter adjusting strategy, so that the preset frame of the finishing mill rolls the head of the intermediate billet according to the adjusted rolling parameters;
when the head is detected to enter a crimping machine for crimping, adjusting the rolling parameters of a preset rack of a finishing mill according to a second rolling parameter adjusting strategy, so that the preset rack of the finishing mill rolls the middle part of the intermediate billet according to the adjusted rolling parameters, and the deformation amount of the middle part is larger than that of the head;
and when the tail part is detected to be rolled by the first frame of the finishing mill, adjusting the rolling parameters of a preset frame of the finishing mill according to a third rolling parameter adjusting strategy, so that the preset frame of the finishing mill rolls the tail part of the intermediate billet according to the adjusted rolling parameters, and the deformation quantity of the tail part is larger than that of the middle part.
In a second aspect, an embodiment of the present application provides a strip shape control apparatus for hot-rolled strip steel, the apparatus including:
the detection module is used for detecting the processing stage of the head and the tail of the intermediate billet of the hot-rolled strip steel in the production process of the hot rolling unit;
the adjusting module is used for adjusting the rolling parameters of a preset rack of the finishing mill according to a first rolling parameter adjusting strategy when the foremost end of the head is detected to be exposed out of the last rack of the finishing mill, so that the head of the intermediate billet is rolled by the preset rack of the finishing mill according to the adjusted rolling parameters;
the adjusting module is further used for adjusting the rolling parameters of a preset rack of a finishing mill according to a second rolling parameter adjusting strategy when the head is detected to enter the crimping machine for crimping, so that the preset rack of the finishing mill rolls the middle part of the intermediate billet according to the adjusted rolling parameters, and the deformation amount of the middle part is larger than that of the head;
and the adjusting module is further used for adjusting the rolling parameters of a preset rack of the finishing mill according to a third rolling parameter adjusting strategy when the tail part is detected to be rolled by the first rack of the finishing mill, so that the preset rack of the finishing mill rolls the tail part of the intermediate billet according to the adjusted rolling parameters, and the deformation quantity of the tail part is larger than that of the middle part.
In a third aspect, an embodiment of the present application provides an electronic device, where the device includes: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements a method as claimed in any one of the claims herein.
In a fourth aspect, embodiments of the present application provide a computer storage medium having computer program instructions stored thereon, which when executed by a processor, implement a method according to any one of the claims of the present application.
According to the strip shape control method, device, equipment and computer storage medium in the production process of the hot-rolled strip steel, different rolling parameter adjustment strategies are adopted to adjust the rolling parameters of the preset rack of the finishing mill according to the preset rolling parameter adjustment strategies under the condition that the position of the hot-rolled strip steel is detected to meet the preset conditions and at different processing stages by detecting the processing stages of the hot-rolled strip steel intermediate blank in the production process of the hot rolling unit, and then the finishing mill is controlled to roll different parts of the intermediate blank according to the corresponding rolling parameters, so that the hot-rolled strip steel is controlled to generate micro-moderate wave deformation, the deformation caused by cooling is offset, and the cooling wave shape is improved. The automatic control device has the advantages that the arrangement characteristics of the existing equipment are combined, the automatic roll bending force control function is added for specific hot-rolled strip steel specifications in a finishing mill system, the edge wave defect of the hot-rolled strip steel is improved, and the yield of the hot-rolled strip steel is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a hot rolled strip production process provided in an embodiment of the present application.
FIG. 2 is a schematic flow chart of a strip shape control method in a hot rolled strip steel production process according to an embodiment of the present application;
FIG. 3 is a schematic structural view of a strip shape control apparatus in a hot rolled strip production process according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the production process of the hot rolling unit, the intermediate blank rolled in the rough rolling process is subjected to finish rolling, laminar cooling and coiling for 3 stages to form a hot rolled plate strip product.
FIG. 1 shows a part of the process flow of the production process of hot rolled strip steel, which comprises the following steps: and (3) continuously rolling the roughly rolled intermediate blank by using a seven-rack finishing mill, then carrying out laminar cooling, carrying out water cooling to a proper temperature to obtain a required tissue, and finally forming a steel coil by using an underground coiler.
The hot rolled strip elongation is defined as follows:
wherein:
βjis the elongation of any fiber in the transverse direction; Δ Lj: the difference between the longitudinal length of the fiber and the reference length; l: a longitudinal reference length.
The flatness is defined as follows
Wherein: beta is aMEAS: actual value of flatness; beta is aDR: drive side elongation; beta is aOP: an operating side elongation; beta is aC: elongation in the middle.
βMEASIf the value is more than 0, the edge wave appears; beta is aMEAS< 0, representing the presence of a moderate wave.
Generally, the flatness control target βt0, i.e. it is desired to obtain a flat hot-rolled strip at the outlet, but taking into account the presence of internal stresses, or laminar flowThe influence of the thermal stress and the transformation stress on the shape of the hot-rolled strip after cooling is controlled to be non-zero when a target value is given, that is, the target betatIs not 0. The complexity is that the specific amount cannot be accurately given through a model, which puts higher requirements on process personnel.
ASFC flatness feedback control function: the flatness meter transmits the measured flatness value beta to the controller through a hard wireMEAS. When beta isMEAS＞βtIncreasing the bending force of the last frame; beta is aMEAS＜βtThe final frame roll bending force is reduced. The detected flatness is brought closer to a target value by controlling the final stand roll bending force.
The current defects of ASFC flatness feedback control are two points: the first one can only control symmetrical wave form, and the scene is usually with asymmetrical wave form many, and the second one is that the instrument detects mainly explicit wave form, can not detect potential wave form, has certain limitation. The effective distance for ASFC to function is before the coiler bites the steel, after the coiler bites the steel, the ASFC continues to run, but the hot rolled strip builds up tension between the finishing train and the coiler, the hot rolled strip has a small wave shape, and the ASFC output remains substantially constant.
Aiming at the condition that the plate shape of a finish rolling outlet is good, but the quality of the plate shape of a finished product is influenced by serious waves after laminar cooling when the thin-gauge high-strength steel is rolled, the following innovative ideas are proposed:
the control method is generally used for the final stand of the finishing mill group. According to the technological requirements of rolling thin high-strength steel and the actual plate shape conditions of different positions of the head, the middle and the tail in the length direction of the on-site hot-rolled strip steel, an operator selects and applies the control method from a primary computer control picture, automatically increases a proper roll bending force strategy at a certain speed, offsets the stress concentration of the edge of the hot-rolled strip steel and improves the edge wave defect of the hot-rolled strip steel.
In order to solve the problems of the prior art, the embodiment of the application provides a method, a device and equipment for controlling the shape of a hot-rolled strip steel in the production process. First, a method for controlling a strip shape in a hot rolled strip production process according to an embodiment of the present invention will be described.
FIG. 2 is a schematic flow chart of a strip shape control method in a hot rolled strip steel production process according to an embodiment of the present application. As shown in fig. 2, the strip shape control method in the production process of the hot-rolled strip steel provided by the embodiment of the application comprises the following steps:
and 204, when the tail part is detected to be rolled by the first frame of the finishing mill, adjusting the rolling parameters of a preset frame of the finishing mill according to a third rolling parameter adjustment strategy, so that the preset frame of the finishing mill rolls the tail part of the intermediate billet according to the adjusted rolling parameters, and the deformation quantity of the tail part is larger than that of the middle part.
According to the strip shape control method in the production process of the hot-rolled strip steel, the processing stage of the hot-rolled strip steel intermediate blank in the production process of the hot rolling unit is detected, according to the preset rolling parameter adjustment strategy, under the condition that the position of the hot-rolled strip steel is detected to meet the preset condition and at different processing stages, different rolling parameter adjustment strategies are adopted, the rolling parameters of the preset rack of the finishing mill are adjusted, the finishing mill is controlled to roll different parts of the intermediate blank according to the corresponding rolling parameters, and therefore the hot-rolled strip steel is controlled to generate micro-medium wave deformation, deformation caused by cooling is offset, and the cooling wave shape is improved. The automatic control device has the advantages that the arrangement characteristics of the existing equipment are combined, the automatic roll bending force control function is added for specific hot-rolled strip steel specifications in a finishing mill system, the edge wave defect of the hot-rolled strip steel is improved, and the yield of the hot-rolled strip steel is improved.
The strip shape control method in the production process of the hot rolled strip steel can be executed by controlling a hot rolled strip steel production device through a hot rolled strip steel production controller, wherein the controller can be a computer with a control function.
In some embodiments of the present application, the controller may obtain the processing stage of the head and tail of the intermediate slab of the hot rolled strip in the hot rolling mill train by monitoring the processing information of the hot rolled strip in step 201.
The intermediate billet of the hot-rolled strip steel is a processed piece of the hot-rolled strip steel in the production process of the hot-rolled unit.
The head of the hot rolling strip steel is a processing part of the intermediate billet of the hot rolling strip steel along the advancing direction of a processing piece in the production process from the foremost end to the distance from the frame at the rearmost end of the finishing mill to the coiler.
The tail part of the hot-rolled strip steel is a processing part of which the length from the tail end to the front part is the distance from the first frame of the finishing mill to the tail end frame along the advancing direction of a processing piece in the production process of the intermediate blank of the hot-rolled strip steel.
The hot rolling unit is a finishing mill unit for rolling hot strip steel in the hot strip steel production project, a coiling machine and a processing device between the finishing mill unit and the coiling machine.
The production process stage of the hot rolled strip in the hot rolling unit is the rolling stage of the hot rolled strip, the laminar cooling stage and the curling stage
Illustratively, in the production process of the hot rolled strip, when the hot rolled strip intermediate blank reaches the hot rolling mill train, the controller acquires the processing stage of the head and tail of the intermediate blank of the hot rolled strip in the hot rolling mill train by monitoring the processing information of the hot rolled strip.
Optionally, in some embodiments of the present application, before the detecting the processing stage of the head and the tail of the intermediate slab of the hot-rolled strip in the production process of the hot-rolling mill train, the method further includes:
and under the condition that the automatic plate shape control system is detected to be closed, responding to an input instruction of a user, and starting a plate shape control function of the hot-rolled strip steel.
The controller may turn on a strip shape control function of the hot rolled strip in response to a user's input command in case it is recognized that the automatic strip shape control system is turned off before detecting a processing stage of a head and a tail of an intermediate slab of the hot rolled strip in the hot rolling mill train.
An automatic strip shape control system (ASFC, automatic flatness control), also known as flatness feedback, of the finishing mill train adjusts the roll bending force of the downstream stand in real time, mainly based on the flatness deviation detected by the outlet flatness meter.
The flatness meter can only detect the flatness of the head of the hot rolled strip steel, and the strategy of participating in control also aims at the head of the hot rolled strip steel. After the hot rolled strip enters the coiler, the straightness is about 0 due to the tension, and the potential wave shape of the hot rolled strip cannot be controlled.
Before detecting the processing stage of the head and the tail of the intermediate billet of the hot-rolled strip steel in the production process of the hot rolling unit, a user can control the automatic plate shape control system of the finishing mill unit to be closed by inputting a control command.
Under the condition that the automatic strip shape control system is closed, a user can select to use the strip shape control method in the production process of the hot-rolled strip steel in the control module of the controller.
Illustratively, the controller can monitor whether an automatic strip shape control system in a hot rolled strip steel production system is in a closed state, and can respond to an input instruction of a user to start the strip shape control function of the hot rolled strip steel under the condition that the automatic strip shape control system is detected to be in the closed state.
In this embodiment, the controller may detect in advance that the automatic shape control function of the system is in a closed state, and open the shape control function of the present application according to an input instruction of a user, thereby avoiding conflict between automatic shape adjustment of the automatic shape control system and the shape control method of the present application, and improving the shape control effect.
Optionally, in some embodiments of the present application, before detecting the processing stage at which the head and the tail of the intermediate slab of the hot-rolled strip are in the production process of the hot rolling train, the method further comprises:
and determining the first rolling parameter adjustment strategy, the second rolling parameter adjustment strategy and the third rolling parameter adjustment strategy according to the characteristic parameters of the hot-rolled strip steel.
Before detecting the processing stage of the head and the tail of the intermediate slab of the hot-rolled strip in the hot rolling mill train, the controller may determine the first rolling parameter adjustment strategy, the second rolling parameter adjustment strategy, and the third rolling parameter adjustment strategy according to the characteristic parameters of the hot-rolled strip.
The characteristic parameters of the hot rolled strip steel can be input by a user in the system or can be stored in the system in advance.
The first rolling parameter adjustment strategy, the second rolling parameter adjustment strategy and the third rolling parameter adjustment strategy are adjustment strategies of own processing parameters of a rack of the finishing mill in the production process of the hot-rolled strip steel. The first rolling parameter adjustment strategy, the second rolling parameter adjustment strategy and the third rolling parameter adjustment strategy can comprise adjustment speed and adjustment amount of processing parameters in the production process of the hot-rolled strip steel and the like.
For example, the controller may determine a rolling parameter adjustment strategy adapted to the currently processed hot rolled strip according to the characteristic parameter of the current hot rolled strip.
In the embodiment, different hot rolled strip steels are detected, and the optimal rolling parameter adjustment strategy corresponding to the hot rolled strip steel being processed is selected, so that the shape control effect of the hot rolled strip steels is further improved, and the yield of the hot rolled strip steels is improved.
Optionally, in some embodiments of the present application, the characteristic parameter is at least one of the hot rolled steel strip grade and/or an actual strip shape of the hot rolled steel strip.
The characteristic parameter may be the type of hot rolled strip or the actual shape of the hot rolled strip.
The steel grade of the hot-rolled strip steel can be determined according to the quality, the application, the chemical composition and the like of the hot-rolled strip steel.
The actual plate shape of the hot-rolled strip steel is the actual plate shape information of the hot-rolled strip steel in the production process, and the actual plate shape information can comprise the flatness or convexity and the like of the hot-rolled strip steel.
In the embodiment, the optimal rolling parameter adjusting strategy corresponding to the hot rolled strip being processed is selected by detecting the steel types of different hot rolled strips and/or the actual plate shapes of the hot rolled strips, so that the plate shape control effect of the hot rolled strips is further improved, and the yield of the hot rolled strips is improved.
In some embodiments of the present application, in step 202, the controller adjusts rolling parameters of a preset stand of the finishing mill according to a first rolling parameter adjustment strategy when detecting that the foremost end of the head is exposed from the last stand of the finishing mill, so that the preset stand of the finishing mill rolls the head of the intermediate billet with the adjusted rolling parameters.
The head of the hot-rolled strip steel intermediate billet is positioned at a section of the processing part of the head of the hot-rolled strip steel at the foremost end of the hot-rolled strip steel intermediate billet along the advancing direction of a processing piece in the production process.
The preset frame of the finishing mill is a frame of a finishing mill group for processing a workpiece by the finishing mill along the intermediate blank of the hot-rolled strip steel in the production process.
For example, the controller controls the finishing mill to adjust the rolling parameters of the preset stand of the finishing mill according to the first rolling parameter adjustment strategy after recognizing that the foremost end of the head of the hot-rolled strip is exposed from the rearmost stand of the finishing mill during the production of the hot-rolled strip, so that the preset stand of the finishing mill rolls the head of the hot-rolled strip according to the adjusted rolling parameters.
Optionally, in some embodiments of the present application, the rolling parameter of the preset stand of the finishing mill is a roll bending force provided by the preset stand of the finishing mill.
The information of the bending force provided by the preset stand of the finishing mill includes an adjustment speed of the bending force and an adjustment amount of the bending force.
The roll bending technology is a technology for controlling the convexity and flatness of hot-rolled strip steel by bending the roll body of a roll through mechanical force, usually uses hydraulic pressure as power, and is also called as hydraulic roll bending.
The controller can calculate the roll bending force value required for obtaining good plate shape or transverse thickness precision in advance according to the material quality, material width, material thickness, original convexity, rolling reduction, rolling pressure and original parameters of the rolling mill before rolling the hot rolled strip steel.
The roll bending force can be calculated according to the plate shape prediction model, and can also be statistically analyzed by a user according to actual production data to obtain roll bending force data with the best production effect.
The roll bending force may be provided by a stand of a finishing mill to ensure that the hot rolled strip passes through the stand with good strip shape and less strip crown.
Optionally, in some embodiments of the present application, when it is detected that the processing stage of the head is the end of the finish rolling stage, adjusting the rolling parameters of the preset stand of the finish rolling mill according to a first rolling parameter adjustment strategy specifically includes:
and when the machining stage of the head is detected to be the end of the finish rolling stage, delaying for a first preset time, and adjusting the rolling parameters of a preset rack of the finish rolling mill according to a first rolling parameter adjusting strategy.
And when detecting that the processing stage of the head is the end of the finish rolling stage, delaying for a first preset time, and adjusting the rolling parameters of a preset rack of the finish rolling mill according to a first rolling parameter adjustment strategy by a controller.
The first preset time can be input by a user, and a controller can also select the first preset time according to characteristic parameters such as the type of the hot rolled strip steel or the actual shape of the hot rolled strip steel.
Illustratively, the controller delays for a certain time after recognizing that the foremost end of the head of the hot-rolled strip is exposed from the rearmost stand of the finishing mill during the production of the hot-rolled strip, and controls the finishing mill to adjust the rolling parameters of the preset stand of the finishing mill according to the first rolling parameter adjustment strategy, so that the preset stand of the finishing mill rolls the head of the hot-rolled strip according to the adjusted rolling parameters.
In this embodiment, the controller may adjust the rolling parameters of the finishing mill housing after delaying the preset time by detecting that the foremost end of the head of the hot rolled strip is exposed from the rearmost housing of the finishing mill during the production of the hot rolled strip, so as to prevent the deformation of the foremost end of the head of the hot rolled strip and the head of the hot rolled strip from being uneven due to direct processing after the foremost end of the head of the hot rolled strip is exposed from the rearmost housing of the finishing mill, and further improve the strip shape control effect.
In some embodiments of the present application, in step 203, the controller adjusts the rolling parameters of the preset stand of the finishing mill according to a second rolling parameter adjustment strategy when it is detected that the head enters the crimper for crimping, so that the preset stand of the finishing mill rolls the middle portion of the intermediate billet with the adjusted rolling parameters, so that the deformation amount of the middle portion is greater than the deformation amount of the head.
The deformation amount is the deformation amount of the hot-rolled strip steel in the hot-rolled strip steel production process, which is relatively in the processing process without rolling parameter adjustment after the rolling processing is carried out by using the adjusted rolling parameters.
Illustratively, the controller controls the finishing mill to adjust the rolling parameters of the preset stand of the finishing mill according to the second rolling parameter adjustment strategy when recognizing that the head of the hot-rolled strip enters the crimper to be crimped in the production process of the hot-rolled strip, so that the preset stand of the finishing mill rolls the head of the hot-rolled strip according to the adjusted rolling parameters.
In some embodiments of the present application, in step 204, the controller adjusts the rolling parameters of the preset stands of the finishing mill according to a third rolling parameter adjustment strategy when detecting that the tail is rolled by the first stand of the finishing mill, so that the preset stands of the finishing mill roll the tail of the intermediate billet with the adjusted rolling parameters, so that the deformation amount of the tail is greater than the deformation amount of the middle part.
Illustratively, the controller controls the finishing mill to adjust the rolling parameters of the preset stand of the finishing mill according to a third rolling parameter adjustment strategy when recognizing that the tail of the hot-rolled strip is rolled by the first stand of the finishing mill in the production process of the hot-rolled strip, so that the preset stand of the finishing mill rolls the head of the hot-rolled strip according to the adjusted rolling parameters.
Optionally, in some embodiments of the present application, the adjusting, according to the first rolling parameter adjustment strategy, the rolling parameters of the preset stand of the finishing mill specifically includes:
controlling the roll bending force of a preset frame of the finishing mill to continuously increase a first regulating quantity at a first speed;
the adjusting of the rolling parameters of the preset frame of the finishing mill according to the second rolling parameter adjustment strategy specifically includes:
controlling the roll bending force of a preset frame of the finishing mill to continuously increase a second regulating quantity at a second speed;
the adjusting of the rolling parameters of the preset frame of the finishing mill according to the third rolling parameter adjustment strategy specifically includes:
controlling the roll bending force of a preset frame of the finishing mill to continuously increase a third regulating quantity at a third speed;
the preset frame of the finishing mill is a tail end frame of the finishing mill.
In some embodiments of the present application, the first speed is a speed at which the bending force of the last stand of the finishing mill increases when it is detected that the most forward processing stage of the head is the finishing rolling stage is the last stand exposed from the last stand of the finishing mill, and the first adjustment amount is a magnitude of the bending force of the finishing mill increasing at the first speed.
The second speed is a speed at which the bending force of the end stand of the finishing mill is increased when the head is detected to enter the crimper for crimping, and the second adjustment amount is a magnitude of the bending force of the finishing mill increased at the second speed.
The third speed is a speed at which the bending force of the end stand of the finishing mill increases when it is detected that the rolling of the tail portion by the first stand of the finishing mill is ended, and the third adjustment amount is a magnitude of the bending force of the finishing mill increased at the third speed.
The first speed and the first adjustment amount, the second speed and the second adjustment amount, and the third speed and the third adjustment amount may be input by a user according to the steel type or the actual plate shape of the hot rolled strip, or a corresponding threshold may be selected by the controller according to the current steel type or the actual plate shape of the hot rolled strip.
The threshold may be a threshold of an optimal rolling parameter corresponding to the steel type or the actual plate shape of the hot-rolled strip obtained by statistical analysis according to historical processing data, or a rolling parameter corresponding to the steel type and/or the actual plate shape of the hot-rolled strip measured through an experimental process before the hot-rolled strip is processed.
The final stand of the finishing mill is the last stand of the finishing mill in the forward direction of the workpiece in the process of producing the intermediate blank of the hot rolled strip.
Illustratively, in the hot rolled strip processing, in a case where it is detected that the processing stage of the foremost end of the head is the finishing stage as the last stand rolling exposed from the last stand of the finishing mill, the roll bending force of the last stand of the finishing mill is increased by a first adjustment amount at a first speed; upon detecting that the head enters the crimper for crimping, increasing the roll bending force of the finishing mill end housing by a second adjustment amount at a second increase rate; upon detecting the end of rolling of the tail by the first stand of the finishing mill, the roll bending force of the finishing mill end stand is increased by a third adjustment amount at a third increase speed.
In the embodiment, the straightness detected by the shape meter is not considered, the full length of the hot rolled strip steel is controlled, the hot rolled strip steel is divided into a head section, a middle section and a tail section, the straightness of the hot rolled strip steel in the full length direction is respectively controlled, and the straightness of the hot rolled strip steel is not only aimed at the head of the hot rolled strip steel. By carrying out sectional control on the hot-rolled strip steel, the defects that the existing strip shape control method only can carry out strip shape detection on the head of the hot-rolled strip steel and carry out strip shape control according to the strip shape detection result are overcome, the strip shape control is carried out on the whole length of the hot-rolled strip steel, and the strip shape control effect in the production process of the hot-rolled strip steel is further improved.
Based on the plate shape control method in the production process of the hot-rolled strip steel provided by the embodiment, correspondingly, the application also provides a specific implementation mode of the plate shape control device in the production process of the hot-rolled strip steel. Please see the examples below.
Referring first to fig. 3, an apparatus 300 for controlling a hot rolled strip shape according to an embodiment of the present invention includes:
the detection module 301 is used for detecting the processing stages of the head and the tail of the intermediate billet of the hot-rolled strip steel in the production process of the hot rolling unit;
an adjusting module 302, configured to, when it is detected that the foremost end of the head is exposed from the last stand of the finishing mill, adjust a rolling parameter of a preset stand of the finishing mill according to a first rolling parameter adjustment policy, so that the preset stand of the finishing mill rolls the head of the intermediate slab with the adjusted rolling parameter;
the adjusting module 302 is further configured to, when it is detected that the head enters the crimper for crimping, adjust a rolling parameter of a preset stand of a finishing mill according to a second rolling parameter adjustment policy, so that the preset stand of the finishing mill rolls the middle portion of the intermediate billet according to the adjusted rolling parameter, so that a deformation amount of the middle portion is greater than a deformation amount of the head;
the adjusting module 302 is further configured to, when it is detected that the tail is rolled by the first stand of the finishing mill, adjust the rolling parameters of a preset stand of the finishing mill according to a third rolling parameter adjustment policy, so that the preset stand of the finishing mill rolls the tail of the intermediate billet according to the adjusted rolling parameters, and the deformation amount of the tail is greater than the deformation amount of the middle portion.
The plate shape control device in the production process of the hot-rolled strip steel can adjust the rolling parameters of the preset rack of the finishing mill by detecting the processing stage of the hot-rolled strip steel intermediate blank in the production process of the hot rolling unit according to the preset rolling parameter adjusting strategy under the condition that the position of the hot-rolled strip steel is detected to meet the preset conditions and when the hot-rolled strip steel is in different processing stages, and further control the finishing mill to roll different parts of the intermediate blank according to the corresponding rolling parameters, so that the hot-rolled strip steel is controlled to generate micro-medium wave deformation, the deformation amount caused by cooling is offset, and the cooling wave shape is improved. The automatic control device has the advantages that the arrangement characteristics of the existing equipment are combined, the automatic roll bending force control function is added for specific hot-rolled strip steel specifications in a finishing mill system, the edge wave defect of the hot-rolled strip steel is improved, and the yield of the hot-rolled strip steel is improved.
Optionally, the plate shape control device 300 in the hot rolled strip production process of the present application further includes:
and the rolling parameter determining module is used for determining the first rolling parameter adjusting strategy, the second rolling parameter adjusting strategy and the third rolling parameter adjusting strategy according to the characteristic parameters of the hot-rolled strip steel.
Optionally, the characteristic parameter is at least one of the hot rolled strip steel grade and/or an actual plate shape of the hot rolled strip steel.
Optionally, the rolling parameters of the preset frame of the finishing mill are roll bending forces provided by the preset frame of the finishing mill.
Optionally, the adjusting module 302 is specifically configured to control the roll bending force of a preset stand of the finishing mill to continuously increase by a first adjustment amount at a first speed;
the adjusting module 303 is further configured to control the roll bending force of the preset frame of the finishing mill to continuously increase a second adjustment amount at a second speed;
the adjusting module 304 is further configured to control the roll bending force of the preset frame of the finishing mill to continuously increase a third adjustment amount at a third speed;
the preset frame of the finishing mill is a tail end frame of the finishing mill.
Optionally, the adjusting module 302 is further configured to, after delaying a first preset time when it is detected that the processing stage of the head is the end of the finish rolling stage, adjust the rolling parameters of the preset stand of the finish rolling mill according to a first rolling parameter adjustment strategy.
Optionally, the plate shape control device 300 in the hot rolled strip production process of the present application further includes:
and the function starting module is used for responding to an input instruction of a user and starting the plate shape control function of the hot-rolled strip steel under the condition of detecting that the automatic plate shape control system is closed.
Fig. 4 shows a hardware structure diagram of an electronic device 400 provided in an embodiment of the present application.
The electronic device 400 may include a processor 401 and a memory 402 storing computer program instructions.
Specifically, the processor 401 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more Integrated circuits of the embodiments of the present Application.
The memory may include Read Only Memory (ROM), Random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors), it is operable to perform operations described with reference to the methods according to an aspect of the application.
The processor 401 reads and executes the computer program instructions stored in the memory 402 to implement the strip shape control method in the production process of the hot rolled strip steel in any one of the above embodiments.
In one example, electronic device 400 may also include a communication interface 403 and a bus 410. As shown in fig. 4, the processor 401, the memory 402, and the communication interface 403 are connected via a bus 410 to complete communication therebetween.
The communication interface 403 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present application.
The electronic apparatus 400 may perform the strip shape control method in the hot rolled strip manufacturing process according to the embodiment of the present application, thereby implementing the strip shape control method and apparatus in the hot rolled strip manufacturing process described with reference to fig. 2 and 3.
In addition, the embodiment of the application can provide a computer storage medium to realize by combining the strip shape control method in the production process of the hot rolled strip steel in the embodiment. The computer storage medium having computer program instructions stored thereon; the computer program instructions, when executed by a processor, implement any of the above-described embodiments of a method of controlling strip shape during hot rolled strip production.
It is to be understood that the present application is not limited to the particular arrangements and instrumentality described above and shown in the attached drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions or change the order between the steps after comprehending the spirit of the present application.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the present application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Aspects of the present application are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of 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, 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, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware for performing the specified functions or acts, or combinations of special purpose hardware and computer instructions.
As described above, only the specific embodiments of the present application are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.
Claims (11)
1. A method for controlling the shape of a hot-rolled strip steel in the production process is characterized by comprising the following steps:
detecting the processing stage of the head and the tail of the intermediate billet of the hot-rolled strip steel in the production process of the hot rolling unit;
when the foremost end of the head is detected to be exposed out of the last frame of the finishing mill, adjusting the rolling parameters of a preset frame of the finishing mill according to a first rolling parameter adjusting strategy, so that the preset frame of the finishing mill rolls the head of the intermediate billet according to the adjusted rolling parameters;
when the head is detected to enter a crimping machine for crimping, adjusting the rolling parameters of a preset rack of a finishing mill according to a second rolling parameter adjusting strategy, so that the preset rack of the finishing mill rolls the middle part of the intermediate billet according to the adjusted rolling parameters, and the deformation amount of the middle part is larger than that of the head;
and when the tail part is detected to be rolled by the first frame of the finishing mill, adjusting the rolling parameters of a preset frame of the finishing mill according to a third rolling parameter adjusting strategy, so that the preset frame of the finishing mill rolls the tail part of the intermediate billet according to the adjusted rolling parameters, and the deformation quantity of the tail part is larger than that of the middle part.
2. The method of claim 1, wherein prior to detecting the processing stage of the head and tail of the intermediate slab of hot rolled strip steel in the production process of the hot rolling train, the method further comprises:
and determining the first rolling parameter adjustment strategy, the second rolling parameter adjustment strategy and the third rolling parameter adjustment strategy according to the characteristic parameters of the hot-rolled strip steel.
3. The method according to claim 2, characterized in that the property parameter is at least one of the hot rolled steel strip grade and/or the actual plate shape of the hot rolled steel strip.
4. The method of claim 1, wherein the rolling parameter of the pre-set stand of the finishing mill is a roll bending force provided by the pre-set stand of the finishing mill.
5. The method according to claim 4, wherein the adjusting of the rolling parameters of the preset stands of the finishing mill according to the first rolling parameter adjustment strategy comprises:
controlling the roll bending force of a preset frame of the finishing mill to continuously increase a first regulating quantity at a first speed;
the adjusting of the rolling parameters of the preset frame of the finishing mill according to the second rolling parameter adjustment strategy specifically includes:
controlling the roll bending force of a preset frame of the finishing mill to continuously increase a second regulating quantity at a second speed;
the adjusting of the rolling parameters of the preset frame of the finishing mill according to the third rolling parameter adjustment strategy specifically includes:
controlling the roll bending force of a preset frame of the finishing mill to continuously increase a third regulating quantity at a third speed;
the preset frame of the finishing mill is a tail end frame of the finishing mill.
6. The method according to claim 1, wherein when it is detected that the processing phase of the head is the end of the finishing rolling phase, adjusting the rolling parameters of a preset stand of the finishing mill according to a first rolling parameter adjustment strategy comprises:
and when the machining stage of the head is detected to be the end of the finish rolling stage, delaying for a first preset time, and adjusting the rolling parameters of a preset rack of the finish rolling mill according to a first rolling parameter adjusting strategy.
7. The method of claim 1, wherein prior to said detecting the processing stage in which the head and tail of the rough rolled intermediate slab of hot rolled strip are in the production process of the hot rolling train, the method further comprises:
and under the condition that the automatic plate shape control system is detected to be closed, responding to an input instruction of a user, and starting a plate shape control function of the hot-rolled strip steel.
8. A hot rolled strip shape control apparatus, comprising:
the detection module is used for detecting the processing stage of the head and the tail of the intermediate billet of the hot-rolled strip steel in the production process of the hot rolling unit;
the adjusting module is used for adjusting the rolling parameters of a preset rack of the finishing mill according to a first rolling parameter adjusting strategy when the foremost end of the head is detected to be exposed out of the last rack of the finishing mill, so that the head of the intermediate billet is rolled by the preset rack of the finishing mill according to the adjusted rolling parameters;
the adjusting module is further used for adjusting the rolling parameters of a preset rack of a finishing mill according to a second rolling parameter adjusting strategy when the head is detected to enter the crimping machine for crimping, so that the preset rack of the finishing mill rolls the middle part of the intermediate billet according to the adjusted rolling parameters, and the deformation amount of the middle part is larger than that of the head;
and the adjusting module is further used for adjusting the rolling parameters of a preset rack of the finishing mill according to a third rolling parameter adjusting strategy when the tail part is detected to be rolled by the first rack of the finishing mill, so that the preset rack of the finishing mill rolls the tail part of the intermediate billet according to the adjusted rolling parameters, and the deformation quantity of the tail part is larger than that of the middle part.
9. An electronic device, characterized in that the device comprises: a processor and a memory storing computer program instructions;
the processor, when executing the computer program instructions, implements the method of any of claims 1-7.
10. A computer-readable storage medium having computer program instructions stored thereon which, when executed by a processor, implement the method of any one of claims 1-7.
11. A computer program product, wherein instructions in the computer program product, when executed by a processor of an electronic device, cause the electronic device to perform the method of any of claims 1-7.
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| CN202210061908.8A CN114472542A (en) | 2022-01-19 | 2022-01-19 | Method, device and equipment for controlling plate shape in production process of hot-rolled strip steel |
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| CN202210061908.8A CN114472542A (en) | 2022-01-19 | 2022-01-19 | Method, device and equipment for controlling plate shape in production process of hot-rolled strip steel |
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