CN114918265A - Tension control method and device for loop at strip steel finish rolling inlet - Google Patents
Tension control method and device for loop at strip steel finish rolling inlet Download PDFInfo
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- CN114918265A CN114918265A CN202210395973.4A CN202210395973A CN114918265A CN 114918265 A CN114918265 A CN 114918265A CN 202210395973 A CN202210395973 A CN 202210395973A CN 114918265 A CN114918265 A CN 114918265A
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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
- B21B37/48—Tension control; Compression control
- B21B37/50—Tension control; Compression control by looper control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/02—Tension
- B21B2265/04—Front or inlet tension
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Abstract
The invention discloses a tension control method and a tension control device for a loop at a strip steel finish rolling inlet, and relates to the technical field of strip steel finish rolling. According to the invention, the tension compensation quantity of the finish rolling inlet loop is determined according to the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature, the actual tension of the finish rolling inlet loop is set according to the preset tension and the tension compensation quantity, the actual tension of the finish rolling inlet loop is higher than the preset tension when the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, and the actual tension of the finish rolling inlet loop is lower than the preset tension when the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, so that the influence of FET fluctuation on the strip steel width is compensated, the stability of the strip steel width is ensured, and the product quality is improved.
Description
Technical Field
The invention relates to the technical field of strip steel finish rolling, in particular to a method and a device for controlling tension of a loop at a strip steel finish rolling inlet.
Background
For a thin slab endless rolling production line, the equipment for controlling the width of strip steel is mainly a vertical roll, the vertical roll is generally used for static setting, the dynamic control only considers the influence of the pressure of the vertical roll, and the dynamic width adjusting capacity is not provided for rough rolling and finish rolling. The sheet bar endless rolling line generally ensures the stability of FDT (finish rolling outlet temperature) and does not control FET (finish rolling inlet temperature), so that the FET has the maximum fluctuation of 150 ℃ under the influence of the pulling speed, load and cooling between racks. The fluctuation of the FET can cause the width of rolled strip steel to change, thus causing the width of the strip steel to be inconsistent and reducing the product quality. Therefore, how to compensate the influence of the FET fluctuation on the width of the strip steel becomes a problem to be solved urgently in the field.
Disclosure of Invention
The invention provides a method and a device for controlling the tension of a loop at a strip steel finish rolling inlet, and solves the technical problem of how to compensate the influence of FET fluctuation on the width of strip steel.
On one hand, the embodiment of the invention provides the following technical scheme:
a tension control method for a loop at a finish rolling inlet of strip steel comprises the following steps:
when the finish rolling is started, acquiring the finish rolling inlet temperature and setting the finish rolling inlet temperature as a reference finish rolling inlet temperature;
in the finish rolling process, acquiring the actual finish rolling inlet temperature;
determining the tension compensation quantity of a loop of the finish rolling inlet according to the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature;
setting the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount;
when the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, the actual tension is higher than the preset tension; and when the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, the actual tension is lower than the preset tension.
Preferably, the setting of the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount includes:
setting the sum of the preset tension and the tension compensation amount as the actual tension if the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature;
and if the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, setting the difference value obtained by subtracting the tension compensation amount from the preset tension as the actual tension.
Preferably, the determining a tension compensation amount of the finish rolling inlet loop according to a temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature includes:
acquiring a temperature tension compensation coefficient;
and multiplying the temperature difference by the temperature tension compensation coefficient to obtain the tension compensation quantity.
Preferably, the obtaining the temperature tension compensation coefficient includes:
acquiring a first coefficient, the steel grade of the strip steel and the thickness of the intermediate blank;
determining a second coefficient according to the steel grade, and determining a third coefficient according to the thickness of the intermediate billet;
and multiplying the first coefficient, the second coefficient and the third coefficient to obtain the temperature tension compensation coefficient.
Preferably, said determining a second coefficient according to said steel grade comprises:
if the steel grade is Q235B or pickled plate, the second coefficient is 1.5;
if the steel grade is a hot-base galvanized substrate, the second coefficient is 1;
if the steel grade is SPA-H, the second coefficient is 0.75;
if the steel grade is 700BL, the second coefficient is 0.5.
Preferably, the determining a third coefficient according to the thickness of the intermediate blank includes:
if the thickness of the intermediate blank exceeds 15mm, the third coefficient is 1;
if the thickness of the intermediate blank is between 10 and 15mm, the third coefficient is 1.25;
and if the thickness of the intermediate blank is less than 10mm, the third coefficient is 1.5.
Preferably, after determining the tension compensation amount of the finish rolling inlet loop based on the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature, before setting the actual tension of the finish rolling inlet loop based on a preset tension and the tension compensation amount, the method further includes:
judging whether the tension compensation amount is higher than a preset tension compensation threshold value or not;
and if so, setting the tension compensation threshold as the tension compensation amount, otherwise, directly executing the step of setting the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount.
On the other hand, the embodiment of the invention also provides the following technical scheme:
a tension control device for a loop at a finish rolling inlet of strip steel comprises:
the device comprises a reference finish rolling inlet temperature setting module, a precision rolling temperature setting module and a precision rolling temperature setting module, wherein the reference finish rolling inlet temperature setting module is used for acquiring a finish rolling inlet temperature and setting the finish rolling inlet temperature as a reference finish rolling inlet temperature when finish rolling starts;
the actual finish rolling inlet temperature acquisition module is used for acquiring the actual finish rolling inlet temperature in the finish rolling process;
the tension compensation amount determining module is used for determining the tension compensation amount of the finish rolling inlet loop according to the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature;
the tension setting module of the finish rolling inlet loop is used for setting the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount; when the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, the actual tension is higher than the preset tension; and when the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, the actual tension is lower than the preset tension.
On the other hand, the embodiment of the invention also provides the following technical scheme:
an electronic device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize any one of the loop tension control methods for the strip steel finish rolling inlet.
On the other hand, the embodiment of the invention also provides the following technical scheme:
a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements any of the above-described methods of strip finishing mill entry loop tension control.
One or more technical schemes provided by the invention at least have the following technical effects or advantages:
according to the invention, the tension compensation quantity of the finish rolling inlet loop is determined according to the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature, the actual tension of the finish rolling inlet loop is set according to the preset tension and the tension compensation quantity, the actual tension of the finish rolling inlet loop is higher than the preset tension when the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, and the actual tension of the finish rolling inlet loop is lower than the preset tension when the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, so that the influence of FET fluctuation on the strip steel width is compensated, the stability of the strip steel width is ensured, and the product quality is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below 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.
FIG. 1 is a flow chart of a loop tension control method for a strip steel finish rolling inlet in the embodiment of the invention;
FIG. 2 is a schematic view of a thin slab endless rolling line in an embodiment of the present invention;
FIG. 3 is an effect diagram of a tension control method for a loop at a strip steel finish rolling inlet in the embodiment of the invention;
FIG. 4 is a schematic structural diagram of a tension control device for a loop at a strip finishing inlet in the embodiment of the invention.
Detailed Description
The embodiment of the invention provides a method and a device for controlling the tension of a loop at a strip steel finish rolling inlet, and solves the technical problem of how to compensate the influence of FET fluctuation on the width of strip steel.
In order to better understand the technical scheme of the invention, the technical scheme of the invention is described in detail in the following with the accompanying drawings and specific embodiments.
First, it is noted that the term "and/or" appearing herein is merely an associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
As shown in fig. 1, the method for controlling the tension of the loop at the entry of the finish rolling of strip steel of the present embodiment includes:
step S1, when the finish rolling is started, acquiring a finish rolling inlet temperature and setting the finish rolling inlet temperature as a reference finish rolling inlet temperature;
step S2, acquiring the actual finish rolling inlet temperature in the finish rolling process;
step S3, determining the tension compensation quantity of the loop at the finish rolling inlet according to the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature;
step S4, setting the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount; when the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, the actual tension of a finish rolling inlet loop is higher than the preset tension; and when the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, the actual tension of the finish rolling inlet loop is lower than the preset tension.
As shown in FIG. 2, in the thin slab endless rolling line, HET (rough rolling inlet temperature) is about 1040 ℃, HDT (rough rolling outlet temperature) is about 920 ℃, FET (finish rolling inlet temperature) is usually in the range of 1000 to 1250 ℃, usually about 1150 ℃, and up to 1250 ℃, and FDT (finish rolling outlet temperature) is about 840 ℃, so that FET is the highest position of the rolling zone temperature. The 3# loop in fig. 2 is the finish rolling inlet loop in this example. Generally, if the FET is not fluctuating, the actual tension of the finish rolling inlet loop will be at the preset tension at all times.
Experiments in the embodiment show that in the finish rolling process, if the FET is raised and the actual tension of a finish rolling inlet loop is not changed, the rolled strip steel is narrowed; if the FETs are lowered and the actual tension of the finish rolling inlet loop is unchanged, the rolled strip will widen. In the actual rolling, considering that the strip becomes wider when the actual tension of the finish rolling inlet loop becomes larger and becomes narrower when the actual tension of the finish rolling inlet loop becomes smaller, the influence of the fluctuation of the FET on the strip width can be compensated by increasing the actual tension of the finish rolling inlet loop when the FET is raised and decreasing the actual tension of the finish rolling inlet loop when the FET is lowered.
Step S4 includes: if the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, setting the sum of the preset tension and the tension compensation amount as the actual tension of the finish rolling inlet loop; and if the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, setting the difference value of the tension compensation quantity subtracted from the preset tension as the actual tension of the finish rolling inlet loop. Therefore, the tension compensation quantity can just compensate the influence of FET fluctuation on the width of the strip steel.
In step S1, the finish rolling entry temperature at the start of finish rolling is considered to be an ideal finish rolling entry temperature, and if the actual finish rolling entry temperature during finish rolling is always the same as the finish rolling entry temperature at the start of finish rolling, that is, if the FET does not fluctuate, the width of the band width is kept uniform. Considering that the finish rolling inlet temperature obtained by a single scan may have an error, which may cause the set reference finish rolling inlet temperature to deviate from the ideal value, step S1 may include:
when the finish rolling is started, periodically scanning the finish rolling inlet temperature; the average value of the plurality of finish rolling inlet temperatures obtained by the consecutive multiple scans is set as the reference finish rolling inlet temperature.
Thus, the average value of the multiple scans is taken as the reference finish rolling inlet temperature, and the set reference finish rolling inlet temperature is basically kept near an ideal value.
In step S3, the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature is an absolute value, and if the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, the actual finish rolling inlet temperature is subtracted from the reference finish rolling inlet temperature to obtain a temperature difference; and if the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, subtracting the actual finish rolling inlet temperature from the reference finish rolling inlet temperature to obtain a temperature difference. It is easily conceivable that the larger the temperature difference, the larger the amount of tension compensation should be. Step S3 specifically includes:
acquiring a temperature tension compensation coefficient;
and multiplying the temperature difference by the temperature tension compensation coefficient to obtain the tension compensation quantity.
Wherein the temperature tension compensation coefficient is used for converting the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature into the tension compensation quantity of the finish rolling inlet loop. The temperature tension compensation coefficient can be a fixed value, and all the strip steels adopt the same temperature tension compensation coefficient, but considering that the influence of the same tension compensation quantity on the widths of different strip steels can be different, if all the strip steels adopt the same temperature tension compensation coefficient, the tension compensation quantity can not just compensate the influence of FET fluctuation on the widths of certain strip steels. Therefore, in step S3 of this embodiment, the acquiring the temperature tension compensation coefficient includes:
acquiring a first coefficient, the steel grade of the strip steel and the thickness of the intermediate blank;
determining a second coefficient according to the steel grade, and determining a third coefficient according to the thickness of the intermediate billet;
and multiplying the first coefficient, the second coefficient and the third coefficient to obtain a temperature tension compensation coefficient.
Wherein the first coefficient may be 0.002.
The determining of the second coefficient according to the steel grade comprises:
if the steel grade is Q235B or a pickled plate, the second coefficient is 1.5; if the steel grade is a hot-base galvanized substrate, the second coefficient is 1; if the steel type is SPA-H, the second coefficient is 0.75; if the steel grade is 700BL, the second coefficient is 0.5.
The determining of the third coefficient according to the thickness of the intermediate blank comprises the following steps:
if the thickness of the intermediate blank exceeds 15mm, the third coefficient is 1; if the thickness of the intermediate blank is between 10 and 15mm, the third coefficient is 1.25; if the thickness of the intermediate blank is less than 10mm, the third coefficient is 1.5.
For example, if the steel type is a hot-dip galvanized substrate, the thickness of the intermediate billet is 10mm, and the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature at a certain time is T, the amount of tension compensation is 0.002 × 1.25 × T — 0.0025T.
Therefore, the temperature tension compensation coefficient obtained by calculation after the second coefficient is determined according to the steel grade and the third coefficient is determined according to the thickness of the intermediate billet can enable the tension compensation amount to just compensate the influence of FET fluctuation on the width of all strip steels.
If the tension compensation amount is too large, for example, more than 1Mpa, the stability of the rolling process may be affected. In order to avoid that the tension compensation amount greatly affects the stability of the rolling process, the embodiment preferably further includes, after step S3 and before step S4:
judging whether the tension compensation amount is higher than a preset tension compensation threshold value or not;
if so, the tension compensation threshold is set as the tension compensation amount, otherwise, the step S4 is directly executed. Wherein, the tension compensation threshold value can be 1Mpa, and the tension compensation amount is set to 1Mpa when the tension compensation amount is higher than 1Mpa, so that the stability of the rolling process is prevented from being influenced by too large tension compensation amount.
As shown in FIG. 3, the first wavy line represents the strip width, the second wavy line represents the actual finish inlet temperature, and the third wavy line represents the actual tension of the finish inlet loop. It can be seen that when the actual finish rolling inlet temperature is reduced from about 1129.4 to about 1112.25, the actual tension of the finish rolling inlet loop is increased from about 3.94975 to about 3.97826, and the width of the strip is kept unchanged, so that the influence of FET fluctuation on the width of the strip is compensated.
As shown in fig. 4, this embodiment further provides a tension control device for a loop at a finish rolling inlet of strip steel, including:
the device comprises a reference finish rolling inlet temperature setting module, a control module and a control module, wherein the reference finish rolling inlet temperature setting module is used for acquiring a finish rolling inlet temperature and setting the finish rolling inlet temperature as a reference finish rolling inlet temperature when finish rolling starts;
the actual finish rolling inlet temperature acquisition module is used for acquiring the actual finish rolling inlet temperature in the finish rolling process;
the tension compensation amount determining module is used for determining the tension compensation amount of the finish rolling inlet loop according to the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature;
the tension setting module of the finish rolling inlet loop is used for setting the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount; when the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, the actual tension of a finish rolling inlet loop is higher than the preset tension; and when the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, the actual tension of the finish rolling inlet loop is lower than the preset tension.
The tension control device for the strip steel finish rolling inlet loop of the embodiment can determine the tension compensation amount of the finish rolling inlet loop according to the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature, set the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount, enable the actual tension of the finish rolling inlet loop to be higher than the preset tension when the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, enable the actual tension of the finish rolling inlet loop to be lower than the preset tension when the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, compensate the influence of FET fluctuation on the width of strip steel, ensure the stability of the width of the strip steel and improve the product quality.
Based on the same inventive concept as the strip steel finish rolling inlet loop tension control method, the embodiment further provides an electronic device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of any one of the strip steel finish rolling inlet loop tension control methods.
Where a bus architecture (represented by a bus) is used, the bus may comprise any number of interconnected buses and bridges that link together various circuits including one or more processors, represented by a processor, and memory, represented by a memory. The bus may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the receiver and transmitter. The receiver and transmitter may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor is responsible for managing the bus and general processing, while the memory may be used to store data used by the processor in performing operations.
Since the electronic device described in this embodiment is an electronic device used for implementing the loop tension control method for the strip finishing rolling inlet in the embodiment of the present invention, based on the strip finishing rolling inlet loop tension control method described in the embodiment of the present invention, those skilled in the art can understand the specific implementation manner of the electronic device of this embodiment and various modifications thereof, and therefore, a detailed description of how to implement the method in the embodiment of the present invention by the electronic device is not repeated here. As long as the person skilled in the art implements the electronic equipment adopted by the method for controlling the tension of the loop at the strip steel finish rolling inlet in the embodiment of the invention, the method and the device belong to the protection scope of the invention.
Based on the same inventive concept as the strip steel finish rolling inlet loop tension control method, the invention also provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to realize any one of the strip steel finish rolling inlet loop tension control methods.
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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded 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 the preferred embodiment and all changes and modifications that 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 tension control method for a loop at a finish rolling inlet of strip steel is characterized by comprising the following steps:
when the finish rolling is started, acquiring a finish rolling inlet temperature and setting the finish rolling inlet temperature as a reference finish rolling inlet temperature;
in the finish rolling process, acquiring the actual finish rolling inlet temperature;
determining the tension compensation quantity of a loop at the finish rolling inlet according to the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature;
setting the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount;
when the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, the actual tension is higher than the preset tension; and when the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, the actual tension is lower than the preset tension.
2. The strip steel finishing rolling inlet loop tension control method according to claim 1, wherein the setting of the actual tension of the finishing rolling inlet loop according to a preset tension and the tension compensation amount includes:
setting the sum of the preset tension and the tension compensation amount as the actual tension if the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature;
and if the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, setting the difference value obtained by subtracting the tension compensation amount from the preset tension as the actual tension.
3. The strip finishing rolling inlet loop tension control method of claim 1, wherein determining a tension compensation amount of a finishing rolling inlet loop based on a temperature difference between the actual finishing rolling inlet temperature and the reference finishing rolling inlet temperature comprises:
acquiring a temperature tension compensation coefficient;
and multiplying the temperature difference by the temperature tension compensation coefficient to obtain the tension compensation quantity.
4. The strip steel finishing rolling inlet loop tension control method according to claim 3, wherein the obtaining of the temperature tension compensation coefficient includes:
acquiring a first coefficient, the steel grade of the strip steel and the thickness of the intermediate blank;
determining a second coefficient according to the steel grade, and determining a third coefficient according to the thickness of the intermediate billet;
and multiplying the first coefficient, the second coefficient and the third coefficient to obtain the temperature tension compensation coefficient.
5. The strip finishing inlet loop tension control method of claim 4, wherein determining the second coefficient based on the steel grade comprises:
if the steel grade is Q235B or pickled plate, the second coefficient is 1.5;
if the steel grade is a hot-base galvanized substrate, the second coefficient is 1;
if the steel grade is SPA-H, the second coefficient is 0.75;
if the steel grade is 700BL, the second coefficient is 0.5.
6. The strip finishing inlet loop tension control method of claim 4, wherein the determining a third coefficient based on the thickness of the intermediate slab comprises:
if the thickness of the intermediate blank exceeds 15mm, the third coefficient is 1;
if the thickness of the intermediate blank is between 10 and 15mm, the third coefficient is 1.25;
and if the thickness of the intermediate blank is less than 10mm, the third coefficient is 1.5.
7. The strip finishing rolling inlet loop tension control method of claim 1, wherein after determining an amount of tension compensation of a finishing rolling inlet loop based on a temperature difference between the actual finishing rolling inlet temperature and the reference finishing rolling inlet temperature, before setting an actual tension of the finishing rolling inlet loop based on a preset tension and the amount of tension compensation, the method further comprises:
judging whether the tension compensation amount is higher than a preset tension compensation threshold value or not;
and if so, setting the tension compensation threshold as the tension compensation amount, otherwise, directly executing the step of setting the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount.
8. The utility model provides a belted steel finish rolling entry loop tension control device which characterized in that includes:
the device comprises a reference finish rolling inlet temperature setting module, a control module and a control module, wherein the reference finish rolling inlet temperature setting module is used for acquiring a finish rolling inlet temperature and setting the finish rolling inlet temperature as a reference finish rolling inlet temperature when finish rolling starts;
the actual finish rolling inlet temperature acquisition module is used for acquiring the actual finish rolling inlet temperature in the finish rolling process;
the tension compensation amount determining module is used for determining the tension compensation amount of the finish rolling inlet loop according to the temperature difference between the actual finish rolling inlet temperature and the reference finish rolling inlet temperature;
the tension setting module of the finish rolling inlet loop is used for setting the actual tension of the finish rolling inlet loop according to the preset tension and the tension compensation amount; when the actual finish rolling inlet temperature is higher than the reference finish rolling inlet temperature, the actual tension is higher than the preset tension; and when the actual finish rolling inlet temperature is lower than the reference finish rolling inlet temperature, the actual tension is lower than the preset tension.
9. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to perform the strip finishing inlet loop tension control method of any one of claims 1 to 7.
10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when executed by a processor, implements the strip finishing inlet loop tension control method of any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210395973.4A CN114918265A (en) | 2022-04-14 | 2022-04-14 | Tension control method and device for loop at strip steel finish rolling inlet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210395973.4A CN114918265A (en) | 2022-04-14 | 2022-04-14 | Tension control method and device for loop at strip steel finish rolling inlet |
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| CN114918265A true CN114918265A (en) | 2022-08-19 |
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| CN202210395973.4A Pending CN114918265A (en) | 2022-04-14 | 2022-04-14 | Tension control method and device for loop at strip steel finish rolling inlet |
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2022
- 2022-04-14 CN CN202210395973.4A patent/CN114918265A/en active Pending
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