CN113042541A - Control method and system for continuous casting and rolling production line - Google Patents

Control method and system for continuous casting and rolling production line Download PDF

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Publication number
CN113042541A
CN113042541A CN202110210929.7A CN202110210929A CN113042541A CN 113042541 A CN113042541 A CN 113042541A CN 202110210929 A CN202110210929 A CN 202110210929A CN 113042541 A CN113042541 A CN 113042541A
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China
Prior art keywords
stand
rack
speed
rolling
loop
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Granted
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CN202110210929.7A
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Chinese (zh)
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CN113042541B (en
Inventor
潘彪
刘顺东
李继新
王立辉
肖胜亮
王永和
刘岩
杨林
田炎波
李明辉
吕伟亮
马硕
张文宝
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Shougang Jingtang United Iron and Steel Co Ltd
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Shougang Jingtang United Iron and Steel Co Ltd
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Priority to CN202110210929.7A priority Critical patent/CN113042541B/en
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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
    • B21B37/58—Roll-force control; Roll-gap control
    • 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
    • B21B37/46—Roll speed or drive motor control
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The invention discloses a control method and a system for a continuous casting and rolling production line, wherein the method comprises the following steps: receiving a steel pressing prevention instruction; regulating and controlling the speed of a rolling mill, the roll gap of the rolling mill and a loop of the finishing mill according to a steel pressing prevention instruction until an F5 rack of the finishing mill throws steel: the method comprises the steps of multiplying different coefficients by the current speed of an F1 stand to perform different speed control on an F2 stand, an F3 stand, an F4 stand and an F5 stand respectively, keeping the roll gaps of an F1 stand unchanged, controlling the roll gaps of an F2 stand, an F3 stand, an F4 stand and an F5 stand to be opened to a fast opening position, and controlling a 1# loop between the F1 stand and the F2 stand, a 2# loop between the F2 stand and the F3 stand, a 3# loop between the F3 stand and the F4 stand and a 4# loop between the F4 stand and the F5 stand to fall to the lowest position.

Description

Control method and system for continuous casting and rolling production line
Technical Field
The application relates to the field of steel rolling control, in particular to a control method and a control system for a continuous casting and rolling production line.
Background
At present, in steel production, a rolling production line corresponding to a hot-rolled strip endless rolling technology is a continuous casting and rolling production line. The endless rolling technology of the hot-rolled plate strip achieves remarkable performances in the aspects of improving the yield, the dimensional and shape precision, the rolling proportion of thin specifications and ultrathin specifications and the like. Meanwhile, the continuous casting and rolling production line has the advantages of simplifying the production process flow, shortening the production period, reducing the production cost and the like, so the continuous casting and rolling production line is widely applied. However, because the production line is continuous and compact, once an abnormal state occurs in the production process, the current effective treatment measures are limited, and an operator can only stop the rolling mill by triggering the functions of sudden stop, quick stop and the like of the rolling mill.
Disclosure of Invention
The invention provides a control method and a control system for a continuous casting and rolling production line, which aim to solve or partially solve the technical problem of steel piling and steel pressing of the whole production line.
In order to solve the technical problem, the invention provides a control method of a continuous casting and rolling production line, which comprises the following steps:
receiving a steel pressing prevention instruction;
regulating and controlling the speed of the rolling mill, the roll gap of the rolling mill and the loop of the finishing mill according to the steel-pressing prevention instruction until the F5 stand of the finishing mill throws steel, wherein the regulating and controlling the speed of the rolling mill, the roll gap of the rolling mill and the loop of the finishing mill specifically comprises the following steps:
taking the current speed of the F1 rack as a reference, and multiplying different coefficients respectively to perform different speed regulation and control on the F2 rack, the F3 rack, the F4 rack and the F5 rack;
keeping the rolling gaps of the F1 stand unchanged, and controlling the rolling gaps of the F2 stand, the F3 stand, the F4 stand and the F5 stand to be opened to a quick opening position;
and controlling the 1# loop between the F1 rack and the F2 rack, the 2# loop between the F2 rack and the F3 rack, the 3# loop between the F3 rack and the F4 rack, and the 4# loop between the F4 rack and the F5 rack to fall to the lowest position.
Preferably, the performing different speed control on the F2 rack, the F3 rack, the F4 rack, and the F5 rack by multiplying different coefficients by using the current speed of the F1 rack as a reference specifically includes:
controlling a speed of the F2 gantry to be K of a current speed of the F1 gantry1Doubling;
controlling the F3 rack speed to be K of the F1 rack speed2Doubling;
controlling the F4 rack speed to be K of the F1 rack speed3Doubling;
controlling the F5 rack speed to be K of the F1 rack speed4And (4) doubling.
Preferably, after the steel pressing prevention instruction is received, the pendulum of the casting machine is controlled to shear, break and break without a head.
Preferably, after receiving the anti-pinch steel instruction, the roughing mill is controlled to keep the rolling state before receiving the anti-pinch steel instruction.
Preferably, after the steel pressing prevention instruction is received, the cutting shears are controlled to continuously break.
Preferably, after the steel pressing prevention instruction is received, the induction heater is controlled to return to the original position.
Preferably, after receiving the anti-pinch command, the coiler is controlled to maintain the coiling state before receiving the anti-pinch command.
The invention discloses a control system of a continuous casting and rolling production line, which comprises:
a PLC control module: the device is used for receiving a steel pressing prevention instruction;
PLC finish rolling control module: the method is used for regulating and controlling the speed of the finishing mill, the roll gap of the finishing mill and the loop until the F5 stand of the finishing mill throws steel, wherein the regulating and controlling the speed of the finishing mill, the roll gap of the finishing mill and the loop specifically comprises the following steps:
taking the current speed of the F1 rack as a reference, and multiplying different coefficients respectively to perform different speed regulation and control on the F2 rack, the F3 rack, the F4 rack and the F5 rack;
keeping the rolling gaps of the F1 stand unchanged, and controlling the rolling gaps of the F2 stand, the F3 stand, the F4 stand and the F5 stand to be opened to a quick opening position;
and controlling the 1# loop between the F1 rack and the F2 rack, the 2# loop between the F2 rack and the F3 rack, the 3# loop between the F3 rack and the F4 rack, and the 4# loop between the F4 rack and the F5 rack to fall to the lowest position.
Preferably, the PLC finish rolling control module is specifically configured to multiply different coefficients by using the current speed of the F1 rack as a reference to perform different speed control on the F2 rack, the F3 rack, the F4 rack, and the F5 rack, and specifically includes:
controlling a speed of the F2 gantry to be K1 times a current speed of the F1 gantry;
controlling the F3 gantry speed to be K2 times the F1 gantry speed;
controlling the F4 gantry speed to be K3 times the F1 gantry speed;
controlling the F5 gantry speed to be K4 times the F1 gantry speed.
Preferably, the PLC control module is specifically configured to control the casting machine to perform pendulum shearing, breaking and endless breaking after receiving the anti-pinch instruction.
Preferably, the PLC control module is specifically configured to, after receiving the anti-pinch steel instruction, control the roughing mill to maintain a rolling state before receiving the anti-pinch steel instruction.
Preferably, the PLC control module is specifically used for controlling the continuous breaking of the cropping shears after receiving the steel pressing prevention instruction.
Preferably, the PLC control module is specifically configured to control the induction heater to return to an original position after receiving the anti-pinch instruction.
Preferably, the PLC control module is specifically configured to, after receiving the anti-pinch steel instruction, control the coiler to maintain a coiling state before receiving the anti-pinch steel instruction.
The invention discloses 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 above-mentioned method.
The invention discloses a computer device, comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the method when executing the program.
Through one or more technical schemes of the invention, the invention has the following beneficial effects or advantages:
the invention discloses a control method and a control system for a continuous casting and rolling production line, which regulate and control the speed of a rolling mill, the roll gap of the rolling mill and a loop of a finishing mill according to a received steel-pressing-preventing instruction, and respectively multiply different coefficients by taking the current speed of an F1 stand as a reference to regulate and control the speed of an F2 stand, an F3 stand, an F4 stand and an F5 stand, so as to prevent a strip steel from being sleeved among the rolling mills and keep the forward tension of the strip steel. In addition, through regulation and control, the roll gaps of the F1 stand are kept unchanged, the roll gaps of the F2 stand, the F3 stand, the F4 stand and the F5 stand are controlled to be opened to a quick opening position, in addition, the 1# loop, the 2# loop, the 3# loop and the 4# loop among the stands are controlled to fall to the lowest position, so that the current rolling state can be continuously kept through the rolling mill F1 for rolling until the rolling mill F5 throws steel, the roll gaps of other rolling mills are completely matched with the rolling mill F1 in speed after being quickly opened, steel piling and steel pressing accidents of a production line are avoided, in addition, the increase of abnormal wear and consumption of the rolls due to steel pressing of the rolls is also avoided, and meanwhile, the waste steel treatment time is also shortened.
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
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a flowchart of a control method of a continuous casting and rolling line according to an embodiment of the present invention.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
At present, because a continuous and continuous rolling production line is continuous and compact, once an abnormal state occurs in the production process, effective treatment measures are limited, and the phenomena of steel piling and steel pressing, increased consumption of rollers due to abnormal abrasion and long time for processing scrap steel occur in the whole production line. In order to solve the problem, the embodiment of the invention discloses a control method and a control system for a continuous casting and rolling production line, wherein the speed of a rolling mill of a finishing mill, the roll gap of the rolling mill and a loop are regulated and controlled according to a received steel-pressing-preventing instruction, and different speed regulation and control are respectively carried out on an F2 frame, an F3 frame, an F4 frame and an F5 frame by multiplying different coefficients by taking the current speed of the F1 frame as a reference, so that the strip steel is prevented from being sleeved among the rolling mills and the forward tension of the strip steel is kept. In addition, through regulation and control, the roll gaps of the F1 stand are kept unchanged, the roll gaps of the F2 stand, the F3 stand, the F4 stand and the F5 stand are controlled to be opened to a quick opening position, in addition, the 1# loop, the 2# loop, the 3# loop and the 4# loop among the stands are controlled to fall to the lowest position, so that the current rolling state can be continuously kept through the F1 stand to be rolled until the F5 stand throws steel, the roll gaps of other mills are completely matched with the F1 stand in speed after being quickly opened, steel piling and pressing accidents of a production line are avoided, in addition, the increase of abnormal wear and consumption of the rolls due to steel pressing of the rolls is also avoided, and meanwhile, the waste steel processing time is also shortened.
For explaining and explaining the present invention in detail, referring to fig. 1, an embodiment of the present invention discloses a control method for a continuous casting and rolling production line, which includes the following steps:
and 101, receiving a steel pressing prevention instruction.
Specifically, once the rolling state is unstable in the rolling process of the continuous casting and rolling production line, an operator can immediately trigger a steel pressing prevention button arranged on an operation table, the button is connected into a control system of the continuous casting and rolling production line through a signal, and the control system can perform subsequent operation by receiving a steel pressing prevention instruction.
And 102, regulating and controlling the speed of the finishing mill, the roll gap of the finishing mill and the loop according to the steel pressing prevention instruction until the F5 stand of the finishing mill throws steel.
Wherein, the speed of the finishing mill, the roll gap of the finishing mill and the loop can be regulated and controlled simultaneously.
In this embodiment, the rolling mill speed of the finishing mill is controlled, specifically, the current speed of the F1 stand is used as a reference, and the current speed is multiplied by different coefficients, so that different speed controls are performed on the F2 stand, the F3 stand, the F4 stand, and the F5 stand. Thus, when the rolling state is unstable, the strip steel is prevented from being sleeved between the rolling mills by regulating and controlling the speed of the rolling mills, and the forward tension of the strip steel can be keptForce is used for ensuring that the F5 frame can smoothly throw steel. Further, the speed of the finishing mill is regulated, and the current speed of the F1 stand is taken as a reference, and is multiplied by different coefficients to regulate the speed of the F2 stand, the F3 stand, the F4 stand, and the F5 stand, respectively, where the current speed and the speed before receiving the anti-pinch command remain unchanged, and in this embodiment, the speed is specifically: k to control the speed of the F2 gantry to the current speed of the F1 gantry1Doubling; k for controlling F3 machine frame speed to F1 machine frame speed2Doubling; k for controlling F4 machine frame speed to F1 machine frame speed3Doubling; k for controlling F5 machine frame speed to F1 machine frame speed4And (4) doubling. The current speed of the F1 stand and the different coefficients multiplied by other stands are all variable due to the influence of factors such as the material, size, shape, etc. of the rolled strip steel, in this embodiment, the coefficient K multiplied by the current speed of the F1 stand respectively1、K2、K3、K4The same number may be used, or different numbers may be used.
In the embodiment, the roll gaps of the finishing mill are regulated, specifically, when the rolling state is unstable, the roll gap of the F1 stand is kept unchanged, and the roll gaps of the F2 stand, the F3 stand, the F4 stand and the F5 stand are controlled to be opened to a quick opening position, so that the damage caused by steel pressing of the rolls can be avoided, the other stands are completely matched with the F1 stand in speed after the roll gaps of the rolls are quickly opened, and the smooth steel throwing of the F5 stand is facilitated, so that the steel is prevented from being sleeved and stacked between the stands. Further, the present embodiment may use the PLC to detect whether the F5 stand throws steel, and control the finishing mill to end the current setting if the F5 stand throws steel. And if F5 does not throw steel, continuing to control the finishing mill to operate according to the current setting.
In this embodiment, the adjustment of the loop of the finishing mill is performed, and specifically, when the rolling condition is unstable, the 1# loop between the F1 stand and the F2 stand, the 2# loop between the F2 stand and the F3 stand, the 3# loop between the F3 stand and the F4 stand, and the 4# loop between the F4 stand and the F5 stand are all controlled to fall to the lowest position. Therefore, the forward tension of the strip steel can be continuously kept, and the strip steel is prevented from piling up when impacting a roll seam in the forward running process. Meanwhile, the speed of the finishing mill, the roll gap of the finishing mill and the loop are regulated, so that the strip steel between the racks can be rolled continuously in the current rolling state completely through the F1 rack until the F5 rack throws the steel.
In the embodiment, after the steel-pressing prevention instruction is received, the casting machine is controlled to swing, shear, break and break without end, so that the endless rolling mode is broken at the first time, the planned casting stop of the casting machine is realized, the accidents that the casting machine lies in a tundish and a fan-shaped section due to sudden casting stop are avoided, and the loss caused by casting stop due to unstable rolling state is reduced.
In the embodiment, after the anti-pinch command is received, the roughing mill is controlled to keep the rolling state before the anti-pinch command is received, the crop shear is controlled to be continuously broken, and the unqualified strip steel produced when the rolling process state is unstable can smoothly enter the finishing mill to be prepared.
In this embodiment, after receiving the steel-pressing prevention instruction, the induction heater is controlled to return to the original position, specifically, the induction heater is quickly returned to control the temperature of the unqualified steel strip produced at this time, so as to help the steel strip to smoothly enter the finish rolling.
In the embodiment, after the anti-pinch steel instruction is received, the coiler is controlled to be kept in the coiling state before the anti-pinch steel instruction is received, specifically, after the steel strip produced under the anti-pinch steel instruction is cast by the finishing mill, the coiler is controlled to be kept in the coiling state before the anti-pinch steel instruction is received, and the coiling of the steel strip is carried out, so that the continuous casting and rolling production line does not pinch the steel.
The above is all implementation processes of the control method of the continuous casting and rolling production line, and based on the same inventive concept, the embodiment of the invention provides a control system of the continuous casting and rolling production line, which comprises:
a PLC control module: the device is used for receiving a steel pressing prevention instruction;
specifically, once the rolling state is unstable in the rolling process of the continuous casting and rolling production line, an operator can immediately trigger a steel pressing prevention button arranged on an operation table, the button is connected into a control system of the continuous casting and rolling production line through a signal, and the control system can perform subsequent operation by receiving a steel pressing prevention instruction.
A PLC control module: and the device is used for regulating and controlling the speed of the rolling mill, the roll gap of the rolling mill and the loop of the finishing mill according to the steel pressing prevention instruction until the F5 stand of the finishing mill throws steel.
Wherein, the speed of the finishing mill, the roll gap of the finishing mill and the loop can be regulated and controlled simultaneously.
In this embodiment, the rolling mill speed of the finishing mill is controlled, specifically, the current speed of the F1 stand is used as a reference, and the current speed is multiplied by different coefficients, so that different speed controls are performed on the F2 stand, the F3 stand, the F4 stand, and the F5 stand. Therefore, when the rolling state is unstable, the strip steel is prevented from being sleeved between the rolling mills by regulating and controlling the speed of the rolling mills, the forward tension of the strip steel can be kept, and the F5 stand can smoothly throw the steel. Further, the speed of the finishing mill is regulated, and the current speed of the F1 stand is taken as a reference, and is multiplied by different coefficients to regulate the speed of the F2 stand, the F3 stand, the F4 stand, and the F5 stand, respectively, where the current speed and the speed before receiving the anti-pinch command remain unchanged, and in this embodiment, the speed is specifically: k to control the speed of the F2 gantry to the current speed of the F1 gantry1Doubling; k for controlling F3 machine frame speed to F1 machine frame speed2Doubling; k for controlling F4 machine frame speed to F1 machine frame speed3Doubling; k for controlling F5 machine frame speed to F1 machine frame speed4And (4) doubling. The current speed of the F1 stand and the different coefficients multiplied by other stands are all variable due to the influence of factors such as the material, size, shape, etc. of the rolled strip steel, in this embodiment, the coefficient K multiplied by the current speed of the F1 stand respectively1、K2、K3、K4The same number may be used, or different numbers may be used.
In the embodiment, the roll gaps of the finishing mill are regulated, specifically, when the rolling state is unstable, the roll gap of the F1 stand is kept unchanged, and the roll gaps of the F2 stand, the F3 stand, the F4 stand and the F5 stand are controlled to be opened to a quick opening position, so that the damage caused by steel pressing of the rolls can be avoided, the other stands are completely matched with the F1 stand in speed after the roll gaps of the rolls are quickly opened, and the smooth steel throwing of the F5 stand is facilitated, so that the steel is prevented from being sleeved and stacked between the stands. Further, the present embodiment may use the PLC to detect whether the F5 stand throws steel, and control the finishing mill to end the current setting if the F5 stand throws steel. And if F5 does not throw steel, continuing to control the finishing mill to operate according to the current setting.
In this embodiment, the adjustment of the loop of the finishing mill is performed, and specifically, when the rolling condition is unstable, the 1# loop between the F1 stand and the F2 stand, the 2# loop between the F2 stand and the F3 stand, the 3# loop between the F3 stand and the F4 stand, and the 4# loop between the F4 stand and the F5 stand are all controlled to fall to the lowest position. Therefore, the forward tension of the strip steel can be continuously kept, and the strip steel is prevented from piling up when impacting a roll seam in the forward running process. Meanwhile, the speed of the finishing mill, the roll gap of the finishing mill and the loop are regulated, so that the strip steel between the racks can be rolled continuously in the current rolling state completely through the F1 rack until the F5 rack throws the steel.
As an alternative embodiment, the PLC control module is further configured to:
in the embodiment, after the steel-pressing prevention instruction is received, the casting machine is controlled to swing, shear, break and break without end, so that the endless rolling mode is broken at the first time, the planned casting stop of the casting machine is realized, the accidents that the casting machine lies in a tundish and a fan-shaped section due to sudden casting stop are avoided, and the loss caused by casting stop due to unstable rolling state is reduced.
As an alternative embodiment, the PLC control module is further configured to:
in the embodiment, after the anti-pinch command is received, the roughing mill is controlled to keep the rolling state before the anti-pinch command is received, the crop shear is controlled to be continuously broken, and the unqualified strip steel produced when the rolling process state is unstable can smoothly enter the finishing mill to be prepared.
As an alternative embodiment, the PLC control module is further configured to:
in this embodiment, after receiving the steel-pressing prevention instruction, the induction heater is controlled to return to the original position, specifically, the induction heater is quickly returned to control the temperature of the unqualified steel strip produced at this time, so as to help the steel strip to smoothly enter the finish rolling.
As an alternative embodiment, the PLC control module is further configured to:
in the embodiment, after the anti-pinch steel instruction is received, the coiler is controlled to be kept in the coiling state before the anti-pinch steel instruction is received, specifically, after the steel strip produced under the anti-pinch steel instruction is cast by the finishing mill, the coiler is controlled to be kept in the coiling state before the anti-pinch steel instruction is received, and the coiling of the steel strip is carried out, so that the continuous casting and rolling production line does not pinch the steel.
Based on the same inventive concept as in the previous embodiments, embodiments of the present invention further provide 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 above.
Based on the same inventive concept as in the previous embodiments, an embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the steps of any one of the methods when executing the program.
Through one or more embodiments of the present invention, the present invention has the following advantageous effects or advantages:
the invention discloses a control method and a control system for a continuous casting and rolling production line, which regulate and control the speed of a rolling mill, the roll gap of the rolling mill and a loop of a finishing mill according to a received steel-pressing-preventing instruction, and respectively multiply different coefficients by taking the current speed of an F1 stand as a reference to regulate and control the speed of an F2 stand, an F3 stand, an F4 stand and an F5 stand, so as to prevent a strip steel from being sleeved among the rolling mills and keep the forward tension of the strip steel. In addition, through regulation and control, the roll gaps of the F1 stand are kept unchanged, the roll gaps of the F2 stand, the F3 stand, the F4 stand and the F5 stand are controlled to be opened to a quick opening position, in addition, the 1# loop, the 2# loop, the 3# loop and the 4# loop among the stands are controlled to fall to the lowest position, so that the current rolling state can be continuously kept through the rolling mill F1 for rolling until the rolling mill F5 throws steel, the roll gaps of other rolling mills are completely matched with the rolling mill F1 in speed after being quickly opened, steel piling and steel pressing accidents of a production line are avoided, in addition, the increase of abnormal wear and consumption of the rolls due to steel pressing of the rolls is also avoided, and meanwhile, the waste steel treatment time is also shortened.
While the preferred embodiments of the present application 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 alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A control method of a continuous casting and rolling production line is characterized by comprising the following steps:
receiving a steel pressing prevention instruction;
regulating and controlling the speed of the rolling mill, the roll gap of the rolling mill and the loop of the finishing mill according to the steel-pressing prevention instruction until the F5 stand of the finishing mill throws steel, wherein the regulating and controlling the speed of the rolling mill, the roll gap of the rolling mill and the loop of the finishing mill specifically comprises the following steps:
taking the current speed of the F1 rack as a reference, and multiplying different coefficients respectively to perform different speed regulation and control on the F2 rack, the F3 rack, the F4 rack and the F5 rack;
keeping the rolling gaps of the F1 stand unchanged, and controlling the rolling gaps of the F2 stand, the F3 stand, the F4 stand and the F5 stand to be opened to a quick opening position;
and controlling the 1# loop between the F1 rack and the F2 rack, the 2# loop between the F2 rack and the F3 rack, the 3# loop between the F3 rack and the F4 rack, and the 4# loop between the F4 rack and the F5 rack to fall to the lowest position.
2. The method according to claim 1, wherein the step of performing different speed control on the F2 stand, the F3 stand, the F4 stand and the F5 stand by multiplying different coefficients by the current speed of the F1 stand, comprises:
controlling a speed of the F2 gantry to be K of a current speed of the F1 gantry1Doubling;
controlling the F3 rack speed to be K of the F1 rack speed2Doubling;
controlling the F4 rack speed to be K of the F1 rack speed3Doubling;
controlling the F5 rack speed to be K of the F1 rack speed4And (4) doubling.
3. The control method for the continuous casting and rolling production line according to claim 1 or 2, wherein after receiving the steel-pressing prevention command, the control method controls the casting machine to shear and break without any end.
4. The control method for a continuous casting and rolling line according to claim 1 or 2, wherein after receiving the anti-crushing command, the roughing mill is controlled to maintain a rolling state before receiving the anti-crushing command.
5. The control method for the continuous casting and rolling production line according to claim 1 or 2, wherein the continuous cutting of the shear is controlled after the steel-crushing-prevention instruction is received.
6. The control method of a continuous casting and rolling production line according to claim 1 or 2, wherein the induction heater is controlled to return to an original position after the steel-pressing-prevention command is received.
7. The control method for a continuous casting and rolling line according to claim 1 or 2, wherein after the reception of the anti-pinch command, the coiler is controlled to maintain a coiling state before the reception of the anti-pinch command.
8. The utility model provides a control system of continuous casting and rolling production line which characterized in that, the system includes:
a PLC control module: the device is used for receiving a steel pressing prevention instruction;
the PLC control module is used for regulating and controlling the speed of a rolling mill, the roll gap of the rolling mill and a loop of the finishing mill until an F5 rack of the finishing mill throws steel, wherein the regulating and controlling of the speed of the rolling mill, the roll gap of the rolling mill and the loop specifically comprises the following steps:
taking the current speed of the F1 rack as a reference, and multiplying different coefficients respectively to perform different speed regulation and control on the F2 rack, the F3 rack, the F4 rack and the F5 rack;
keeping the rolling gaps of the F1 stand unchanged, and controlling the rolling gaps of the F2 stand, the F3 stand, the F4 stand and the F5 stand to be opened to a quick opening position;
and controlling the 1# loop between the F1 rack and the F2 rack, the 2# loop between the F2 rack and the F3 rack, the 3# loop between the F3 rack and the F4 rack, and the 4# loop between the F4 rack and the F5 rack to fall to the lowest position.
9. 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 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1-7 are implemented when the program is executed by the processor.
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