CN113083908A - Method and device for controlling width of hot-rolled width-adjusted blank - Google Patents
Method and device for controlling width of hot-rolled width-adjusted blank Download PDFInfo
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- CN113083908A CN113083908A CN202110347308.3A CN202110347308A CN113083908A CN 113083908 A CN113083908 A CN 113083908A CN 202110347308 A CN202110347308 A CN 202110347308A CN 113083908 A CN113083908 A CN 113083908A
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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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
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Abstract
The invention discloses a method and a device for controlling the width of a hot-rolled width-adjusted blank, wherein the method comprises the following steps: determining a plurality of head measuring points and a plurality of tail measuring points on the width-adjusted blank before entering a side press; obtaining a slab length, a head width reduction amount and a tail width reduction amount based on the plurality of head measurement points and the plurality of tail measurement points; obtaining a width reduction amount adjustment coefficient based on the slab length, the head width reduction amount and the tail width reduction amount; and controlling the side press under variable pressure based on the width reduction quantity adjusting coefficient. The method can obtain the width-adjusting blank with more uniform head and tail width, and avoids production waste.
Description
Technical Field
The invention relates to the technical field of steel making, in particular to a method and a device for controlling the width of a hot-rolled width-adjusted billet.
Background
In order to meet the width requirement and the width reduction capacity limit of a hot rolling line product, a plurality of slab width blank types are generally designed in a continuous casting process, and a width adjusting blank can be generated when different slab widths are switched. The width of the head and the tail of the width-adjusting blank is not uniform, and the difference of the width of the head and the tail is generally 20-150 mm. For width-adjusted billets, the hot rolling is also typically width-controlled according to the normal slab, resulting in a width wedge also in the finished product width. Therefore, most products produced by width-adjusting blanks can only be disposed according to protocol products, and a large amount of waste is caused to enterprises.
It can be seen that the width of the width-adjusted blank is not uniform in the current hot rolling process, which causes serious waste.
Disclosure of Invention
In view of the above problems, the invention provides a method and a device for controlling the width of a hot-rolled width-adjusting billet, which can obtain the width-adjusting billet with more uniform head and tail widths and avoid production waste.
In a first aspect, the present application provides the following technical solutions through an embodiment:
a width control method for a hot-rolled width-adjusted blank comprises the following steps:
determining a plurality of head measuring points and a plurality of tail measuring points on the width-adjusted blank before entering a side press; obtaining a slab length, a head width reduction amount and a tail width reduction amount based on the plurality of head measurement points and the plurality of tail measurement points; obtaining a width reduction amount adjustment coefficient based on the slab length, the head width reduction amount and the tail width reduction amount; and controlling the side press under variable pressure based on the width reduction quantity adjusting coefficient.
Optionally, the determining a plurality of head measurement points and a plurality of tail measurement points on the width-adjusted blank before entering the side press includes:
determining a first preset length at the head of the width-adjusting blank before entering a side press, and determining a second preset length at the tail of the width-adjusting blank; determining a target area based on the first preset length and the second preset length; the target area is a length area outside the first preset length and the second preset length on the width-adjusting blank; a plurality of head measurement points are determined at the head of the target region, and a plurality of tail measurement points are determined at the tail of the target region.
Optionally, obtaining a head width reduction amount and a tail width reduction amount based on the plurality of head measurement points and the plurality of tail measurement points includes:
acquiring a head width mean value of the width-adjusting blank based on the width values of the plurality of head measuring points; obtaining the head width reduction amount based on the original width of the width-adjusting blank and the head width mean value; acquiring a tail width mean value of the width-adjusting blank based on the width values of the plurality of tail measuring points; and obtaining the tail width reduction amount based on the original width of the width-adjusting blank and the tail width mean value.
Optionally, obtaining the slab length based on the plurality of head measurement points and the plurality of tail measurement points includes:
obtaining a first target position based on the positions of the plurality of head measurement points; wherein the first target position is a center position of two farthest points of the plurality of head measurement points; obtaining a second target position based on the positions of the plurality of tail measurement points; wherein the second target position is a central position of two farthest points in the plurality of tail measurement points; and obtaining the length of the slab based on the first target position and the second target position.
Optionally, obtaining a width reduction amount adjustment coefficient based on the slab length, the head width reduction amount, and the tail width reduction amount includes:
based on the formula
Obtaining the width reduction amount adjusting coefficient; where k is the adjustment coefficient of the amount of width reduction,. DELTA.whFor head part width reduction, Δ wtThe tail is reduced in width.
In a second aspect, based on the same inventive concept, the present application provides the following technical solutions through an embodiment:
a width control device for hot-rolled width-adjusted billets comprises:
the determining module is used for determining a plurality of head measuring points and a plurality of tail measuring points on the width-adjusted blank before entering the side press; the first acquisition module is used for acquiring the length of the plate blank, the head width reduction amount and the tail width reduction amount based on the plurality of head measuring points and the plurality of tail measuring points; the second obtaining module is used for obtaining a width reduction amount adjusting coefficient based on the length of the plate blank, the head width reduction amount and the tail width reduction amount; and the control module is used for controlling the side press machine under the variable pressure based on the width reduction amount adjusting coefficient.
Optionally, the determining module is specifically configured to:
determining a first preset length at the head of the width-adjusting blank before entering a side press, and determining a second preset length at the tail of the width-adjusting blank; determining a target area based on the first preset length and the second preset length; the target area is a length area outside the first preset length and the second preset length on the width-adjusting blank; a plurality of head measurement points are determined at the head of the target region, and a plurality of tail measurement points are determined at the tail of the target region.
Optionally, the first obtaining module is specifically configured to:
acquiring a head width mean value of the width-adjusting blank based on the width values of the plurality of head measuring points; obtaining the head width reduction amount based on the original width of the width-adjusting blank and the head width mean value; acquiring a tail width mean value of the width-adjusting blank based on the width values of the plurality of tail measuring points; and obtaining the tail width reduction amount based on the original width of the width-adjusting blank and the tail width mean value.
Optionally, the first obtaining module is specifically configured to:
obtaining a first target position based on the positions of the plurality of head measurement points; wherein the first target position is a center position of two farthest points of the plurality of head measurement points; obtaining a second target position based on the positions of the plurality of tail measurement points; wherein the second target position is a central position of two farthest points in the plurality of tail measurement points; and obtaining the length of the slab based on the first target position and the second target position.
In a third aspect, based on the same inventive concept, the present application provides the following technical solutions through an embodiment:
a computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any of the first aspects.
According to the width control method and device for the hot-rolled width-adjusted blank, provided by the embodiment of the invention, a plurality of head measuring points and a plurality of tail measuring points are determined on the width-adjusted blank before the width-adjusted blank enters a side press. And then based on the plurality of head measuring points and the plurality of tail measuring points, the length of the plate blank, the head width reduction amount and the tail width reduction amount are obtained, the influence of the local width change of the width-adjusting blank on the width reduction amount adjusting coefficient is reduced, and the accuracy of the width reduction amount adjusting coefficient is improved. Further, based on the length of the slab, the head width reduction amount and the tail width reduction amount, a width reduction amount adjustment coefficient is obtained, so that the width adjustment of the width-adjusted slab can be realized by the adjustment coefficient. Finally, based on the width reduction quantity adjusting coefficient, the side press is controlled under variable pressure, so that width adjusting blanks with more uniform head and tail widths can be obtained, and production waste is avoided.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts. In the drawings:
fig. 1 is a flowchart illustrating a method for controlling a width of a hot rolled slab according to a first embodiment of the present invention;
FIG. 2 is a graph showing a width change of a trimmed blank produced without the method of the first embodiment of the present invention;
FIG. 3 is a graph showing the variation of the side press width reduction amount along the length of the width-adjusted blank in the first embodiment of the present invention;
FIG. 4 is a graph showing the variation of the width of the finished width of the width-adjusted blank produced by the method according to the first embodiment of the present invention;
fig. 5 is a schematic structural diagram illustrating a hot-rolled width-adjusting blank width control device according to a second embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
First embodiment
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for controlling a width of a hot rolled slab according to a first embodiment of the present invention. The method comprises the following steps:
step S10: determining a plurality of head measuring points and a plurality of tail measuring points on the width-adjusted blank before entering a side press.
In step S10, since the side press needs to be controlled, the width measurement of the trimmed billet needs to be performed before entering the side press. The plurality of head measurement points should be close to the head position of the width-adjusted blank and the plurality of tail measurement points should be close to the tail position of the width-adjusted blank. In order to avoid the influence caused by the mutual interference of the short stroke control, the width-adjusting blank can be trimmed before the measurement point is determined, that is, the step S10 is specifically executed as follows:
firstly, a first preset length is determined at the head of the width-adjusting blank before entering the side press, and a second preset length is determined at the tail of the width-adjusting blank. The first preset length and the second preset length are length ranges which are subjected to short-distance stroke control interference in the head and the tail of the width-adjusting blank. The first preset length and the second preset length can be the same or different, and can be set differently according to different steel grades. The range value of the first preset length and the second preset length is 0.5-1 m, the mutual interference area of short stroke control can be skipped, the length range of width adjustment calculation in the width adjustment blank can be increased as much as possible, and the accuracy of the calculation of the adjustment coefficient of the subsequent width reduction amount is ensured. That is, the control precision of the middle section of the width-adjusting blank can be improved by abandoning the control precision of the small range of the head section and the tail section of the width-adjusting blank.
Then, determining a target area based on the first preset length and the second preset length; the target area is a length area outside a first preset length and a second preset length on the width-adjusting blank. Finally, a plurality of head measurement points are determined at the head of the target area and a plurality of tail measurement points are determined at the tail of the target area. The number of the head measuring points and the tail measuring points can be the same or different, and can be determined according to the width fluctuation size during production, the larger the width fluctuation is, the more the number of the measuring points can be, and the accuracy of data is improved. For example, the number of the head measurement points and the tail measurement points can be 4-10, and the head measurement points and the tail measurement points can be uniformly distributed or non-uniformly distributed without limitation. In this embodiment, the number of the head measurement points and the number of the tail measurement points can be 5, so that the hardware cost and the labor cost are reduced on the premise of ensuring accurate data.
Step S20: based on the plurality of head measurement points and the plurality of tail measurement points, a slab length, a head width reduction amount, and a tail width reduction amount are obtained.
In step S20, the process of acquiring the slab length is: firstly, obtaining a first target position based on the positions of a plurality of head measuring points; the first target position is the central position of the farthest two points in the head measurement points; then, based on the positions of the tail measuring points, a second target position is obtained; the second target position is the central position of the two farthest points in the tail measuring points; and finally, obtaining the slab length based on the first target position and the second target position. Therefore, the length of the plate blank can be ensured to correspond to the actual head part width reduction amount and the actual tail part width reduction amount, and errors are avoided.
For example, if there are 5 head measurement points and 5 tail measurement points, the width and position data of the head measurement points are (w)i，xi) I is a1, a2, a3, a4 and a5, and the width value and the position data of the tail measuring point are (w)j，xj) J ═ b1, b2, b3, b4, b5, where w isi、wjIs a width value, xi、xjTo widen the position of the measuring point on the blank. If x is among the plurality of head measurement pointsa1、xa5Two farthest points, x in a plurality of tail measurement pointsb1、xb5The two farthest points are the first target position
The second target position is
The length of the slab is
If the head measuring point and the tail measuring point are sequentially arranged measuring points with equal intervals, the first target position is xa3The second target position is xb3The length of the slab is l ═ xb3-xa3。
It should be noted that, in this embodiment, the measurement data of each measurement point may be obtained from a PDI (proportional-integral-derivative control) controller, for example, manually measured by a steelmaking quality inspector, and maintained in a tertiary system, and the tertiary system is issued to a hot rolling secondary system through the PDI. The measuring data of each measuring point can be obtained by a width gauge at the rough rolling inlet, and the width gauge can be arranged atAnd (4) before the lateral pressing machine, width measurement is carried out on the width-adjusted blank, and the position and the width value of each measuring point are recorded. When the width measuring instrument is adopted for measurement, point taking measurement can be carried out on the full length of the width adjusting blank, and finally N measuring points (w) are obtainedi，xi) I 1, 2, 3.., N, a plurality of head measurement points and a plurality of tail measurement points may be selected from the N measurement points.
In step S20, the procedure of acquiring the head and tail width reduction amounts is:
when the head width reduction amount is obtained, the head width mean value of the width-adjusting blank can be obtained based on the width values of the plurality of head measuring points; and obtaining the head width reduction amount based on the original width of the width-adjusting blank and the average value of the head width. For example, the width and position data of the head measurement point are (w)i，xi) I-a 1, a2, a3, a4, a5, the average head width is
Head width reduction Δ wh＝w-wh。
When the tail width reducing amount is obtained, the tail width mean value of the width-adjusting blank can be obtained based on the width values of the plurality of tail measuring points; and obtaining the tail width reduction amount based on the average value of the original width and the tail width of the width-adjusting blank. For example, the width and position data of the tail measurement point is (w)j，xj) J-b 1, b2, b3, b4, b5, the tail width mean value
Tail width reduction Δ wt＝w-wt。
In the embodiment, the length, the head width reduction amount and the tail width reduction amount of the plate blank are obtained through the plurality of head measuring points and the plurality of tail measuring points, so that the influence caused by local width fluctuation of the width-adjusted plate blank can be reduced, and the accuracy of subsequently obtaining the width reduction amount adjusting coefficient is improved.
Step S30: and obtaining a width reduction amount adjusting coefficient based on the slab length, the head width reduction amount and the tail width reduction amount.
In step S30Embodied as being based on a formula
Obtaining a width reduction amount adjusting coefficient; where k is the adjustment coefficient of the amount of width reduction,. DELTA.whFor head part width reduction, Δ wtThe tail is reduced in width. When the control is performed based on the width reduction amount adjustment coefficient, the adjustment can be accurately performed according to the step amount of the side press, and the amount of change in the width reduction amount is k · Δ l when the width-adjusted blank is advanced in the side press every step, and Δ l is the step amount of the side press.
Step S40: and controlling the side press under variable pressure based on the width reduction quantity adjusting coefficient.
In step S40, the width reducing devices of the rough rolling section are typically a side mill and a vertical roll, and the input parameters involved are typically a finish rolling target width, an intermediate slab thickness, a tapping temperature, a rough rolling exit temperature, a rough rolling mode, rough rolling load distribution, a maximum width reduction amount of the side mill and the vertical roll, and the like. The related model is a rough rolling model, in the embodiment, the width reduction amount of the side press of the rough rolling model is controlled through the width reduction amount adjustment coefficient, namely, when the side press performs the pressure reduction control on the width-adjusted blank, the variation amount of the width reduction amount is k · Δ l when the side press advances for one step, so that the width change of the middle section of the width-adjusted blank can be ensured to be more uniform through the pressure-variable control of the side press, and the generation of the wedge-shaped width-adjusted blank is avoided.
For example, a steel grade passes practical production tests and is applied to the production of width-adjustable billets (with the head-tail width difference of 100mm) of a 2250mm hot rolling line. When the width reduction control is not performed by the method of this embodiment, the width curve of the width-adjusted billet is shown in fig. 2. When the method in the embodiment is adopted for width reduction control, the schematic diagram of the change of the width reduction amount of the side press along the length of the slab of the width-adjusting blank is shown in fig. 3, the change value of the width reduction amount of the side press is uniformly reduced from large to small, and the control under variable pressure is realized for each section of the width-adjusting blank. The width of the final finished slab is shown in fig. 4, and it can be seen from fig. 4 that the width of the finished product of the width-adjusted slab obtained by the control production of the method of the present embodiment is more stable and close to the actual width set value, thereby avoiding the generation of the wedge-shaped width-adjusted slab and reducing the waste of the width-adjusted slab.
In the method for controlling the width of the hot-rolled width-adjusted blank, a plurality of head measurement points and a plurality of tail measurement points are determined on the width-adjusted blank before the hot-rolled width-adjusted blank enters the side press. And then based on the plurality of head measuring points and the plurality of tail measuring points, the length of the plate blank, the head width reduction amount and the tail width reduction amount are obtained, the influence of the local width change of the width-adjusting blank on the width reduction amount adjusting coefficient is reduced, and the accuracy of the width reduction amount adjusting coefficient is improved. Further, based on the length of the slab, the head width reduction amount and the tail width reduction amount, a width reduction amount adjustment coefficient is obtained, so that the width adjustment of the width-adjusted slab can be realized by the adjustment coefficient. Finally, based on the width reduction quantity adjusting coefficient, the side press is controlled under variable pressure, so that width adjusting blanks with more uniform head and tail widths can be obtained, and production waste is avoided.
Second embodiment
Referring to fig. 5, based on the same inventive concept, fig. 5 is a schematic structural diagram of a hot-rolled width-adjusting billet width control device 300 according to a second embodiment of the present invention. The width control device 300 for hot-rolled width-adjusted billet comprises:
a determining module 301, configured to determine a plurality of head measurement points and a plurality of tail measurement points on the width-adjusted blank before entering the side press; a first obtaining module 302, configured to obtain a slab length, a head width reduction amount, and a tail width reduction amount based on the plurality of head measurement points and the plurality of tail measurement points; a second obtaining module 303, configured to obtain a width reduction amount adjustment coefficient based on the slab length, the head width reduction amount, and the tail width reduction amount; and the control module 304 is used for performing variable-pressure control on the side press based on the width reduction amount adjusting coefficient.
As an optional implementation manner, the determining module 301 is specifically configured to:
determining a first preset length at the head of the width-adjusting blank before entering a side press, and determining a second preset length at the tail of the width-adjusting blank; determining a target area based on the first preset length and the second preset length; the target area is a length area outside the first preset length and the second preset length on the width-adjusting blank; a plurality of head measurement points are determined at the head of the target region, and a plurality of tail measurement points are determined at the tail of the target region.
As an optional implementation manner, the first obtaining module 302 is specifically configured to:
acquiring a head width mean value of the width-adjusting blank based on the width values of the plurality of head measuring points; obtaining the head width reduction amount based on the original width of the width-adjusting blank and the head width mean value; acquiring a tail width mean value of the width-adjusting blank based on the width values of the plurality of tail measuring points; and obtaining the tail width reduction amount based on the original width of the width-adjusting blank and the tail width mean value.
As an optional implementation manner, the first obtaining module 302 is specifically configured to:
obtaining a first target position based on the positions of the plurality of head measurement points; wherein the first target position is a center position of two farthest points of the plurality of head measurement points; obtaining a second target position based on the positions of the plurality of tail measurement points; wherein the second target position is a central position of two farthest points in the plurality of tail measurement points; and obtaining the length of the slab based on the first target position and the second target position.
As an optional implementation manner, the second obtaining module 303 is specifically configured to:
based on the formula
Obtaining the width reduction amount adjusting coefficient; where k is the adjustment coefficient of the amount of width reduction,. DELTA.whFor head part width reduction, Δ wtThe tail is reduced in width.
It should be noted that the implementation and technical effects of the apparatus 300 for controlling the width of the hot rolled and widened slab provided by the embodiment of the present invention are the same as those of the foregoing method embodiment, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing method embodiment where no part of the apparatus embodiment is mentioned.
Third embodiment
Based on the same inventive concept, a third embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of any of the methods described in the first embodiment above.
It should be noted that, in the computer-readable storage medium provided by the embodiment of the present invention, the specific implementation and the resulting technical effect of each step implemented when the program is executed by the processor are the same as those of the foregoing method embodiment, and for the sake of brief description, for the sake of brevity, no matter which is mentioned in this embodiment, reference may be made to the corresponding contents in the foregoing method embodiment.
The term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship; the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
As will be appreciated by one skilled in the art, 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 (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 processor, 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. Therefore, it is intended that the appended claims be interpreted as including 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 changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A width control method for a hot-rolled width-adjusted blank is characterized by comprising the following steps:
determining a plurality of head measuring points and a plurality of tail measuring points on the width-adjusted blank before entering a side press;
obtaining a slab length, a head width reduction amount and a tail width reduction amount based on the plurality of head measurement points and the plurality of tail measurement points;
obtaining a width reduction amount adjustment coefficient based on the slab length, the head width reduction amount and the tail width reduction amount;
and controlling the side press under variable pressure based on the width reduction quantity adjusting coefficient.
2. The method of claim 1, wherein determining a plurality of head measurement points and a plurality of tail measurement points on the width modulated blank prior to entering a side press comprises:
determining a first preset length at the head of the width-adjusting blank before entering a side press, and determining a second preset length at the tail of the width-adjusting blank;
determining a target area based on the first preset length and the second preset length; the target area is a length area outside the first preset length and the second preset length on the width-adjusting blank;
a plurality of head measurement points are determined at the head of the target region, and a plurality of tail measurement points are determined at the tail of the target region.
3. The method of claim 1, wherein obtaining a head de-widening amount and a tail de-widening amount based on the plurality of head measurement points and the plurality of tail measurement points comprises:
acquiring a head width mean value of the width-adjusting blank based on the width values of the plurality of head measuring points;
obtaining the head width reduction amount based on the original width of the width-adjusting blank and the head width mean value;
acquiring a tail width mean value of the width-adjusting blank based on the width values of the plurality of tail measuring points;
and obtaining the tail width reduction amount based on the original width of the width-adjusting blank and the tail width mean value.
4. The method of claim 1, wherein obtaining a slab length based on the plurality of head measurement points and the plurality of tail measurement points comprises:
obtaining a first target position based on the positions of the plurality of head measurement points; wherein the first target position is a center position of two farthest points of the plurality of head measurement points;
obtaining a second target position based on the positions of the plurality of tail measurement points; wherein the second target position is a central position of two farthest points in the plurality of tail measurement points;
and obtaining the length of the slab based on the first target position and the second target position.
5. The method of claim 1, wherein obtaining a width reduction adjustment factor based on the slab length, the head width reduction, and the tail width reduction comprises:
based on the formula
Obtaining the width reduction amount adjusting coefficient; where k is the adjustment coefficient of the amount of width reduction,. DELTA.whFor head part width reduction, Δ wtThe tail is reduced in width.
6. A width control device for hot-rolled width-adjusted billets is characterized by comprising:
the determining module is used for determining a plurality of head measuring points and a plurality of tail measuring points on the width-adjusted blank before entering the side press;
the first acquisition module is used for acquiring the length of the plate blank, the head width reduction amount and the tail width reduction amount based on the plurality of head measuring points and the plurality of tail measuring points;
the second obtaining module is used for obtaining a width reduction amount adjusting coefficient based on the length of the plate blank, the head width reduction amount and the tail width reduction amount;
and the control module is used for controlling the side press machine under the variable pressure based on the width reduction amount adjusting coefficient.
7. The apparatus of claim 6, wherein the determining module is specifically configured to:
determining a first preset length at the head of the width-adjusting blank before entering a side press, and determining a second preset length at the tail of the width-adjusting blank;
determining a target area based on the first preset length and the second preset length; the target area is a length area outside the first preset length and the second preset length on the width-adjusting blank;
a plurality of head measurement points are determined at the head of the target region, and a plurality of tail measurement points are determined at the tail of the target region.
8. The apparatus of claim 6, wherein the first obtaining module is specifically configured to:
acquiring a head width mean value of the width-adjusting blank based on the width values of the plurality of head measuring points;
obtaining the head width reduction amount based on the original width of the width-adjusting blank and the head width mean value;
acquiring a tail width mean value of the width-adjusting blank based on the width values of the plurality of tail measuring points;
and obtaining the tail width reduction amount based on the original width of the width-adjusting blank and the tail width mean value.
9. The apparatus of claim 6, wherein the first obtaining module is specifically configured to:
obtaining a first target position based on the positions of the plurality of head measurement points; wherein the first target position is a center position of two farthest points of the plurality of head measurement points;
obtaining a second target position based on the positions of the plurality of tail measurement points; wherein the second target position is a central position of two farthest points in the plurality of tail measurement points;
and obtaining the length of the slab based on the first target position and the second target position.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
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| CN113083908B (en) | 2022-11-22 |
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