CN113305154A - Roll shifting control method and device, rolling mill set and storage medium - Google Patents
Roll shifting control method and device, rolling mill set and storage medium Download PDFInfo
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- CN113305154A CN113305154A CN202110472271.7A CN202110472271A CN113305154A CN 113305154 A CN113305154 A CN 113305154A CN 202110472271 A CN202110472271 A CN 202110472271A CN 113305154 A CN113305154 A CN 113305154A
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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
- B21B37/46—Roll speed or drive motor control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/18—Adjusting or positioning rolls by moving rolls axially
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- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses a roll shifting control method, which is used for controlling a working roll of a target rolling mill to shift the roll, and comprises the following steps: determining a target rolling mode of the strip steel; determining a target roll shifting speed of the working roll according to the target rolling mode; and controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed. The invention can effectively solve the technical problem that the prior art cannot meet various rolling modes of the strip steel due to single speed of the working roll shifting.
Description
Technical Field
The invention relates to the field of steel rolling, in particular to a roll shifting control method, a roll shifting control device, a rolling mill group and a storage medium.
Background
In the field of strip steel rolling, in order to prolong the service life of a roller on a hot continuous rolling production line, a working roller shifting system is generally adopted to shift a working roller of a rolling mill. In the prior art, the hot continuous rolling production process has a plurality of rolling modes, such as a single-block rolling mode, a headless rolling mode and the like.
In the prior art, the speed of the working roll shifting is fixed and unchanged, and the roll shifting speed of the rolling mill shifting is required to be different in different rolling modes, so that the problems of instant increase of rolling force deviation and poor integral stability of strip steel rolling caused by mismatching of the roll shifting speed and the rolling modes are easily caused, and accidents such as steel strip rolling breakage and steel piling are caused.
Disclosure of Invention
The embodiment of the application provides a roll shifting control method and device, a rolling mill unit and a storage medium, solves the technical problem that in the prior art, due to the fact that the roll shifting speed of a working roll is single, multiple rolling modes of strip steel cannot be met, and achieves the technical effect that the roll shifting speed of the working roll is matched with the multiple rolling modes of the strip steel.
In a first aspect, the present application provides a roll shifting control method for controlling a work roll of a target rolling mill to perform roll shifting, the method comprising:
determining a target rolling mode of the strip steel;
determining a target roll shifting speed of the working roll according to the target rolling mode;
and controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed.
Preferably, the target rolling mode is one of the following modes: a single block rolling mode, a headless rolling mode, and a semi-headless rolling mode.
Preferably, the first and second electrodes are formed of a metal,
and if the target rolling mode is the single block rolling mode, determining the target roll shifting speed to be the single block mode roll shifting speed according to the single block rolling mode and the position of the head of the strip steel.
Preferably, the determining the target roll shifting speed of the working roll according to the target rolling mode comprises:
and if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, determining that the target roll shifting speed is a non-single block mode roll shifting speed.
Preferably, if the target rolling mill is preceded by N rolling mills, N is a positive integer greater than or equal to 2, and if the target rolling mode is the single block rolling mode, the controlling the target rolling mill to shift the rolls based on the target roll shifting speed includes:
when the running speed of the target rolling mill is greater than or equal to a preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when detecting that the head of the strip steel is conveyed to an inlet of a second rolling mill before the target rolling mill; or
And when the running speed of the target rolling mill is lower than the preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when detecting that the head of the strip steel is conveyed to the inlet of the previous rolling mill of the target rolling mill.
Preferably, if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, before the controlling the target rolling mill to shift rolls based on the target roll shifting speed, the method further includes:
detecting the position of a gauge-variable point of the strip steel, wherein the gauge-variable point is the position of the strip steel rolling specification change;
the controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed comprises the following steps:
and when the variable specification point of the strip steel is detected to be transmitted to an inlet of the target rolling mill, controlling the target rolling mill to start to carry out roll shifting at the non-single block mode roll shifting speed after a first preset time period.
Preferably, the target rolling mill comprises a hydraulic cylinder servo valve, and before the controlling the target rolling mill to shift rolls based on the target roll shifting speed, the method further comprises: determining the roll shifting compensation speed corresponding to the hydraulic cylinder servo valve according to the target roll shifting speed and the roll shifting direction of the working roll;
the controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed comprises the following steps: and controlling the working roll to shift the roll according to the roll shifting compensation speed and the target roll shifting speed through the hydraulic cylinder servo valve.
In a second aspect, the present application provides a roll shifting control device for controlling work rolls of a target rolling mill to perform roll shifting, the device comprising:
the mode determining unit is used for determining a target rolling mode of the strip steel;
the roll shifting speed determining unit is used for determining the target roll shifting speed of the working roll according to the target rolling mode;
and the roll shifting control unit is used for controlling the target rolling mill to shift the roll based on the target roll shifting speed.
Preferably, the target rolling mode is one of the following modes:
a single block rolling mode, a headless rolling mode, and a semi-headless rolling mode.
Preferably, the roll-over speed determination unit is configured to:
and if the target rolling mode is the single block rolling mode, determining the target roll shifting speed to be the single block mode roll shifting speed according to the single block rolling mode and the position of the head of the strip steel.
Preferably, the roll-over speed determination unit is further configured to:
and if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, determining that the target roll shifting speed is a non-single block mode roll shifting speed.
Preferably, the target rolling mill is preceded by N rolling mills, N is a positive integer greater than or equal to 2, and if the target rolling mode is the single block rolling mode, the roll shifting control unit is configured to:
when the running speed of the target rolling mill is greater than or equal to a preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when detecting that the head of the strip steel is conveyed to an inlet of a second rolling mill before the target rolling mill; or
And when the running speed of the target rolling mill is lower than the preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when detecting that the head of the strip steel is conveyed to the inlet of the previous rolling mill of the target rolling mill.
Preferably, if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, the roll shifting control unit includes:
the gauge point detection unit is used for detecting the position of a gauge point of the strip steel, wherein the gauge point is the position of the rolling gauge change of the strip steel;
the roll-shifting control unit is further configured to:
and when the variable specification point of the strip steel is detected to be transmitted to an inlet of the target rolling mill, controlling the target rolling mill to start to carry out roll shifting at the non-single block mode roll shifting speed after a first preset time period.
Preferably, the target rolling mill comprises a hydraulic cylinder servo valve, and the apparatus further comprises:
the hydraulic cylinder servo valve compensation unit is used for determining the roll shifting compensation speed corresponding to the hydraulic cylinder servo valve according to the target roll shifting speed and the roll shifting direction of the working roll;
and the roll shifting control unit is also used for controlling the working roll to shift the roll through the hydraulic cylinder servo valve according to the roll shifting compensation speed and the target roll shifting speed.
In a third aspect, the present application provides a rolling mill train, comprising:
a target rolling mill, wherein the target rolling mill is a rolling mill for performing work roll shifting;
the controller is used for determining a target rolling mode of the strip steel and determining a target roll shifting speed of a working roll of the target rolling mill according to the target rolling mode; and controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed.
Preferably, the target rolling mode is one of the following modes: a single block rolling mode, a headless rolling mode, and a semi-headless rolling mode.
Preferably, the target rolling mill is preceded by N rolling mills, N is a positive integer greater than or equal to 2, and if the target rolling mode is the single block rolling mode, the controller is further configured to:
when the running speed of the target rolling mill is greater than or equal to a preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when detecting that the head of the strip steel is conveyed to an inlet of a second rolling mill before the target rolling mill; or
And when the running speed of the target rolling mill is lower than the preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when detecting that the head of the strip steel is conveyed to the inlet of the previous rolling mill of the target rolling mill.
Preferably, the target rolling mill comprises a hydraulic cylinder servo valve, the controller being configured to:
setting a roll shifting compensation speed corresponding to the hydraulic cylinder servo valve according to the target roll shifting speed and the roll shifting direction of the working roll;
and controlling the working roll to shift the roll according to the roll shifting compensation speed and the target roll shifting speed through the hydraulic cylinder servo valve.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of any of the methods described above.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
in the roll shifting control method provided by the embodiment of the invention, after a target rolling mode of strip steel is determined, a target roll shifting speed of the working roll is determined according to the target rolling mode, and then the target rolling mill is controlled to shift the roll at the target roll shifting speed.
According to the scheme, different target roll shifting speeds for the working roll shifting are determined according to different rolling modes, the technical effect that the working roll shifting speed is matched with multiple rolling modes of strip steel is achieved, the service life of the working roll of the rolling mill is ensured, the integral stability of strip steel rolling is also ensured, and accidents such as strip steel breaking and steel piling are further avoided.
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.
FIG. 1 is a flow chart of a roll shifting control method according to an embodiment of the present invention;
FIG. 2 is a schematic view of the working roll shifting direction of the rolling mill according to one embodiment of the present invention;
FIG. 3 is a flow chart of a roll shifting process provided in accordance with one embodiment of the present invention;
FIG. 4 is a schematic view of a roll-shifting control apparatus according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of a rolling mill train according to a third embodiment of the present invention.
Detailed Description
The embodiment of the application provides a roll shifting control method, and solves the technical problems that in the prior art, due to different rolling modes, the roll shifting speed requirements of the roll shifting of a rolling mill are different, so that the rolling force deviation is increased instantly and the overall stability of strip steel rolling is poor due to the higher roll shifting speed.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a roll shifting control method for controlling work rolls of a target rolling mill to perform roll shifting, the method comprising: determining a target rolling mode of the strip steel; determining a target roll shifting speed of the working roll according to the target rolling mode; and controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of 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.
Example one
The embodiment of the application provides a roll shifting control method, which is used for controlling a working roll of a target rolling mill to shift the roll, and as shown in fig. 1, the method is a flow chart of the roll shifting control method provided by the embodiment of the specification, and specifically comprises the following steps:
step S101: determining a target rolling mode of the strip steel;
step S102: determining a target roll shifting speed of the working roll according to the target rolling mode;
step S103: and controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed.
The roll shifting control method provided by the embodiment of the specification is mainly applied to a rolling mill group on a multi-mode hot continuous rolling production line, wherein the rolling mill group can be a finishing mill group or a rough mill group, and specifically can be a 2250 hot rolling mill group, a 1580 hot rolling mill group, a 1700 hot rolling mill group and the like.
Step S101: and determining a target rolling mode of the strip steel.
When rolling strip steel, a rolling mill group generally has three rolling modes, namely a single-block rolling mode, a headless rolling mode and a semi-headless rolling mode. The target rolling mode may be any one of a single block rolling mode, a headless rolling mode, and a semi-headless rolling mode.
For the purposes of this application, the monobloc rolling mode differs from the endless/semi-endless rolling mode mainly in that: in the single block rolling mode, the head of the strip steel does not reach the inlet of the rolling mill needing roll shifting when the rolling mill needing roll shifting starts roll shifting; in the headless rolling mode/semi-headless rolling mode, the working rolls are already rolling the strip steel when the rolling mill requiring roll shifting starts roll shifting.
The target rolling mode may be obtained by reading an input operation of an operator on an interactive interface before rolling, for example, a rolling mode input box is displayed on the interactive interface, and the operator inputs the target rolling mode corresponding to the current strip steel production in the input box. The target rolling mode may also be determined by a preset sequence of rolling modes in the controller, for example, the preset sequence of rolling modes is a single block rolling mode, a headless rolling mode in turn.
Step S102: and determining the target roll shifting speed of the working roll according to the target rolling mode.
Different rolling modes are correspondingly provided with different working roll shifting speeds, in one embodiment, the roll shifting speed of each rolling mode can be preset, for example, the target roll shifting speed corresponding to the endless rolling mode and the semi-endless rolling mode is 0.1 mm/s; the target roll shifting speed for the single block rolling mode was 2 mm/s. When the target rolling mode is determined, the target roll shifting speed of the working roll can be correspondingly determined according to the target rolling mode. For example: the target rolling mode is a single block rolling mode, and the target roll shifting speed can be determined to be 2mm/s according to the single block rolling mode.
In addition, the roll shifting speed of different rolling modes can be preset, and the roll shifting speed can be determined according to the actual rolling condition, for example, the roll shifting speed can be calculated according to the running speed of the rolling mill and the corresponding relation between the running speed and the roll shifting speed. In the embodiment of the specification, the roll shifting speed can be realized by the following steps: if the target rolling mode is the single block rolling mode, determining the target roll shifting speed as the single block mode roll shifting speed according to the single block rolling mode and the position of the head of the strip steel; and if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, determining that the target roll shifting speed is a non-single block mode roll shifting speed.
The head of the strip steel can be the foremost end of the strip steel, and can also be a position which is a distance away from the foremost end of the strip steel. In order to obtain the real-time position of the strip head, a detection device for detecting the strip head can be arranged upstream of the first rolling mill of the rolling mill train. When the head of the strip steel is detected, the real-time position of the head of the strip steel can be obtained according to the running speed of rollers in the rolling mill set and the distance from the detection point to each rolling mill; the fluorescent mark can be made on the head of the strip steel, and then the running track of the head of the strip steel is detected by sensing the fluorescent mark on the head of the strip steel through a photosensitive sensor arranged on the rolling mill set, so that the real-time position of the head of the strip steel is obtained. When the target rolling mode is a single block rolling mode, the roll shifting speeds of the working rolls required by the head of the strip steel at different positions are different, the target roll shifting speed can be determined to be the single block mode roll shifting speed according to the single block rolling mode and the position of the head of the strip steel, the size of the single block mode roll shifting speed can be set according to the running speed of the rolling mill, for example, the single block mode roll shifting speed is 0.01% -0.1% of the running speed of the rolling mill, in the specific implementation process, the roll shifting speed can be selected according to actual needs, and the method is not limited.
When the head of the strip steel does not reach the inlet of the target rolling mill, if the running speed of the rolling mill is greater than or equal to the preset running speed, in order to finish roll shifting before the head of the strip steel reaches the inlet of the target rolling mill, the working roll of the target rolling mill needs to be controlled to perform roll shifting at a single block mode roll shifting speed when a second frame of rolling mill before the head of the strip steel is positioned at the target rolling mill starts; if the running speed of the rolling mill is lower than the preset running speed, the working rolls of the target rolling mill are controlled to start roll shifting at a single-block mode roll shifting speed when the head of the strip steel is in the previous rolling mill of the target rolling mill, and roll shifting can be completed before the head of the strip steel reaches the inlet of the target rolling mill.
Optionally, in the single block rolling mode, a pressure sensor is arranged for each rolling mill in the rolling mill group, and whether the strip head reaches the inlet of the rolling mill is judged based on the change of the pressure in the pressure sensor.
In the single-block rolling mode, a pressure sensor can be arranged at the inlet of each rolling mill, and the actual rolling force of the rolling mill can be changed when the rolling mill rolls the strip steel, so that the head of the strip steel can be judged to reach the inlet of which rolling mill according to the pressure change in the pressure sensor, and the real-time position of the head of the strip steel can be detected more accurately. For example, if the pressure sensor of a rolling mill detects that the actual rolling force of the strip steel is greater than 4000kN, it indicates that the rolling mill has the strip steel, and if the pressure sensor of a rolling mill detects that the actual rolling force of the strip steel is less than 2000kN, it indicates that the rolling mill has no strip steel.
When the target rolling mode is a headless rolling mode or a semi-headless rolling mode, the roll shifting speed of the working roll can be directly determined to be the non-single block mode roll shifting speed according to the target rolling mode. In the specific implementation process, because the target rolling mill is always in a steel state in the endless rolling mode or the semi-endless rolling mode, the non-single block mode roll shifting speed can be low-speed roll shifting speed in order to ensure the stability of strip steel rolling.
Step S103: and controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed.
After the target rolling mode and the target roll shifting speed are determined, when the strip steel reaches a specified position, the control end controls the working rolls of the target rolling mill to shift at the target roll shifting speed. Taking an example that a target rolling mode is a single block rolling mode, the position of strip steel is the inlet of a previous rolling mill of the target rolling mill, and the speed of the single block mode roll shifting is 3 mm/s: and when the head of the strip steel reaches the inlet of the previous rolling mill of the target rolling mill, the control end controls the working rolls of the target rolling mill to shift at the roll shifting speed of 3 mm/s.
Optionally, if the target rolling mill is preceded by N rolling mills, where N is a positive integer greater than or equal to 2, and the target rolling mill is controlled to shift rolls based on the target roll shifting speed if the target rolling mode is the single block rolling mode, the method includes:
when the running speed of the target rolling mill is greater than or equal to a preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when detecting that the head of the strip steel is conveyed to the first two rolling mills of the target rolling mill; or when the running speed of the target rolling mill is lower than the preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when the condition that the head of the strip steel is conveyed to the inlet of the previous rolling mill of the target rolling mill is detected.
If the speed of the target rolling mill is greater than or equal to the preset rolling mill running speed, the rolling mill running speed is high, and in order to give enough buffer time for roll shifting of the target rolling mill, when the head of the strip steel is detected to reach the inlet of a second frame rolling mill in front of the target rolling mill, the target rolling mill performs roll shifting at the speed of a single block mode roll; if the speed of the target rolling mill is less than the preset rolling mill running speed, the rolling mill running speed is low, the target rolling mill has enough time for roll shifting, and therefore when the head of the strip steel is detected to reach the inlet of the rolling mill which is in front of the target rolling mill, the target rolling mill performs roll shifting at the speed of a single block mode roll. For example: if the preset running speed is 2m/s, the target rolling mill is the third rolling mill in the rolling mill group, the speed is 2.5m/s, the single block mode roll shifting speed is 1.25mm/s, the running speed of the target rolling mill is higher than the preset running speed, and when the head of the strip steel is detected to reach the inlet of the first rolling mill, the target rolling mill starts to shift at the roll shifting speed of 1.25 mm/s.
Optionally, if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, before the controlling the target rolling mill to perform roll shifting at the target roll shifting speed, the method further includes: and detecting the position of the gauge-variable point of the strip steel.
In the endless rolling mode or the semi-endless rolling mode, because the length of one plate blank is often very long, a plurality of sections of strip steels with different specifications can be continuously rolled, and the specification changing point is the position of the rolling specification change of the strip steels. For example, a plate blank is rolled with the thickness of 2mm before the specification changing point, and is rolled with the thickness of 1.8mm after the specification changing point. The detection mode of the variable specification points can be the same as that of the head of the strip steel, and the details are not repeated here. The position of the strip gauge point may be determined from the weight, length, etc. of the strip that has been exported, for example, the rolling length of the strip before the strip gauge point is preset to 100 meters, and the position of the strip gauge point may be obtained from the length of the strip that has been exported and the length of the mill train.
The controlling the target rolling mill to carry out roll shifting at the target roll shifting speed comprises the following steps: and after the variable specification point of the strip steel is transmitted to the target rolling mill, controlling the target rolling mill to start roll shifting at the non-single block mode roll shifting speed after a first preset time period.
In the headless rolling mode or the semi-headless rolling mode, the variable Gauge point is an FGC (dynamic Gauge Control) point of the strip steel, and since the speed, roll gap, and the like of a certain rolling mill are changed when the FGC point reaches the rolling mill, steel piling accidents are easily caused when various problems are concentrated at the same position, the variable of the FGC point is reduced by controlling the roll shifting of a target rolling mill in a delayed manner. The first preset time period is a time period for delaying the roll shifting of the control target rolling mill, and the first preset time period can be set according to actual needs, for example, the first preset time period is 5s or 10 s. And when detecting that the variable specification point of the strip steel reaches the inlet of the target rolling mill, performing roll shifting on the target rolling mill at a non-single block mode roll shifting speed for a first preset time. For example: and the detector detects that the variable specification point reaches the inlet of the target rolling mill, and the target rolling mill delays for 10s and performs roll shifting at the speed of 0.1 mm/s. The non-single block mode roll shifting speed is low speed because strip steel always exists in the target rolling mill in the endless rolling mode or the semi-endless rolling mode
Optionally, the target rolling mill comprises a hydraulic cylinder servo valve, and before the controlling the target rolling mill to shift the roll based on the target roll shifting speed, the method further comprises: determining the roll shifting compensation speed corresponding to the hydraulic cylinder servo valve according to the target roll shifting speed and the roll shifting direction of the working roll; the controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed comprises the following steps: and controlling the working roll to shift the roll according to the roll shifting compensation speed and the target roll shifting speed through the hydraulic cylinder servo valve.
In general, the target rolling mill has 2 working rolls, including an upper working roll and a lower working roll, and the inlet and outlet of each working roll are respectively provided with a hydraulic cylinder servo valve for controlling the working rolls to shift. The working roll has positive and negative directions when running, as shown in fig. 2. Because the hydraulic cylinder servo valve generally has zero offset characteristic, namely errors easily occur, the controller can set corresponding roll shifting compensation speed for each hydraulic cylinder servo valve. The roll shifting compensation speed can be set according to actual needs, can be a preset value, and can also be determined according to current rolling parameters. After the roll shifting compensation speed is determined, the hydraulic cylinder servo valve controls the working roll to shift according to the sum of the roll shifting compensation speed and the target roll shifting speed.
For example, the following steps are carried out: if the upper working roll of the target rolling mill moves from +50mm to +45mm, the lower working roll moves from-50 mm to-45 mm;
in the single block rolling mode: the zero offset compensation speed of the hydraulic cylinder servo valve of the upper working roll inlet roll of the target rolling mill can be set to be-0.6 mm/s, the zero offset compensation speed of the hydraulic cylinder servo valve of the upper working roll outlet roll is set to be 0.8mm/s, the zero offset compensation speed of the hydraulic cylinder servo valve of the lower working roll inlet roll is set to be-0.8 mm/s, and the zero offset compensation speed of the hydraulic cylinder servo valve of the lower working roll outlet roll is set to be 1.0 mm/s;
in endless rolling mode or semi endless rolling mode: the zero offset compensation speed of the hydraulic cylinder servo valve of the upper working roll inlet roll of the target rolling mill can be set to be minus 1.8mm/s, the zero offset compensation speed of the hydraulic cylinder servo valve of the upper working roll outlet roll is set to be 2.0mm/s, the zero offset compensation speed of the hydraulic cylinder servo valve of the lower working roll inlet roll is set to be minus 1.75mm/s, and the zero offset compensation speed of the hydraulic cylinder servo valve of the lower working roll outlet roll is set to be 1.5 mm/s.
To better illustrate the solution of the present application, the present specification provides a roll-shifting flow diagram as shown in fig. 3 to explain the solution. The specific process comprises the following steps of:
a target rolling pattern is first determined.
When the target rolling mode is a single block rolling mode, executing the following steps:
judging whether the running speed of the rolling unit is less than a preset running speed or not, if so, shifting the roll by the target rolling mill at a single-block mode when the head of the strip steel reaches the Fn-1 rolling mill; and if the running speed of the rolling unit is greater than or equal to the preset running speed, when the head of the strip steel reaches the Fn-2 rolling mill, the target rolling mill performs roll shifting at a single block mode until the roll shifting is finished.
When the target rolling mode is a headless rolling mode or a semi-headless rolling mode, executing the following steps:
and when the variable specification point of the strip steel reaches the target rolling mill, the target rolling mill starts to carry out roll shifting at the non-single block mode roll shifting speed until the roll shifting is finished.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
1. in the embodiment of the invention, the target roll shifting speeds of different working rolls are determined according to different rolling modes, so that the technical effect that the roll shifting speeds of the working rolls are matched with various rolling modes of strip steel is realized, the service life of the working rolls of the rolling mill is ensured, the integral stability of strip steel rolling is also ensured, and accidents such as steel piling breaking and the like caused by strip steel rolling are further avoided.
2. In the embodiment of the invention, the zero offset compensation speed is correspondingly set for the hydraulic cylinder servo valve of each working roll of the target rolling mill, so that the speed control of the target rolling mill is more accurate when roll shifting is carried out.
Example two
Based on the same inventive concept, the present specification provides a roll shifting control device 200, as shown in fig. 4, for controlling a work roll of a target rolling mill to perform roll shifting, where the device 200 includes:
a mode determination unit 201 for determining a target rolling mode of the strip steel;
a roll shifting speed determining unit 202 for determining a target roll shifting speed of the work roll according to the target rolling mode;
and the roll shifting control unit 203 is used for controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed.
Optionally, the target rolling mode is one of the following modes:
a single block rolling mode, a headless rolling mode, and a semi-headless rolling mode.
Optionally, a roll-over speed determination unit 202 for:
and if the target rolling mode is the single block rolling mode, determining the target roll shifting speed to be the single block mode roll shifting speed according to the single block rolling mode and the position of the head of the strip steel.
Optionally, the roll-over speed determination unit 202 is further configured to: and if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, determining that the target roll shifting speed is a non-single block mode roll shifting speed.
Optionally, the target rolling mill is preceded by N rolling mills, N is a positive integer greater than or equal to 2, and if the target rolling mode is the single block rolling mode, the roll shifting control unit 203 is configured to:
when the running speed of the target rolling mill is greater than or equal to a preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when the head of the strip steel is conveyed to an inlet of a second rolling mill before the target rolling mill; or
And when the running speed of the target rolling mill is lower than the preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when the strip head is conveyed to the inlet of the previous rolling mill of the target rolling mill.
Optionally, if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, the apparatus 200 further includes:
the variable-specification point detection unit is used for detecting the positions of the variable-specification points of the strip steel;
a roll-over control unit 203 for:
and after the variable specification point of the strip steel is transmitted to the target rolling mill, controlling the target rolling mill to start roll shifting at the non-single block mode roll shifting speed for a first preset time period, wherein the variable specification point is the position of the strip steel rolling specification change.
Optionally, the target rolling mill comprises a hydraulic cylinder servo valve, and the device 200 comprises:
the hydraulic cylinder servo valve compensation unit is used for setting the roll shifting compensation speed corresponding to the hydraulic cylinder servo valve according to the target roll shifting speed and the roll shifting direction of the working roll;
and controlling the working roll to shift the roll according to the roll shifting compensation speed and the target roll shifting speed through the hydraulic cylinder servo valve.
With regard to the above-described apparatus, the specific functions of the respective units have been described in detail in the embodiments of the roll-shifting control method provided in the embodiments of the present specification, and will not be described in detail here.
EXAMPLE III
Based on the same inventive concept as the roll shifting control method in the foregoing embodiment, an embodiment of the present specification further provides a rolling mill group 300, as shown in fig. 5, including:
a target rolling mill 301, wherein the target rolling mill 301 is a rolling mill for performing work roll shifting;
the controller 302 is used for determining a target rolling mode of the strip steel and determining a target roll shifting speed of a working roll of a target rolling mill 301 according to the target rolling mode; and controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed.
Preferably, the target rolling mode is one of the following modes: a single block rolling mode, a headless rolling mode, and a semi-headless rolling mode.
Preferably, the target rolling mill 301 is preceded by N rolling mills, N is a positive integer greater than or equal to 2, and if the target rolling mode is the single block rolling mode, the controller 302 is further configured to:
when the running speed of the target rolling mill 301 is greater than or equal to the preset running speed, controlling the target rolling mill 301 to carry out roll shifting at the single block mode roll shifting speed when the head of the strip steel is conveyed to the inlet of a second rolling mill before the target rolling mill 301; or
When the running speed of the target rolling mill 301 is less than the preset running speed, the target rolling mill 301 is controlled to perform roll shifting at the monoblock mode roll shifting speed when the strip head is conveyed to the inlet of the previous rolling mill of the target rolling mill 301.
If the target rolling mode is the endless rolling mode or the semi-endless rolling mode, the rolling mill train 300 further includes:
a gauge point detector 303, configured to detect a position of a gauge point of the strip steel, where the gauge point is a position at which a rolling gauge of the strip steel changes;
a controller 302 for:
and after the variable specification point of the strip steel is transmitted to the target rolling mill, controlling the target rolling mill to start roll shifting at the non-single block mode roll shifting speed after a first preset time period.
Preferably, the target mill 301 comprises a hydraulic cylinder servo valve 3011, and the controller 302 is configured to:
setting a roll shifting compensation speed corresponding to the hydraulic cylinder servo valve 3011 according to the target roll shifting speed and the roll shifting direction of the working roll;
and controlling the working roll to shift according to the roll shifting compensation speed and the target roll shifting speed through a hydraulic cylinder servo valve 3011.
With regard to the above-described rolling mill train 300, the specific functions of the respective devices have been described in detail in the embodiments of the roll shifting control method provided in the embodiments of the present specification, and will not be described in detail here.
Example four
Based on the same inventive concept, the present specification embodiment provides a computer-readable storage medium on which a computer program is stored, which, when executed by a processor, implements the steps of any one of the aforementioned roll-shifting control methods.
Since the electronic device described in this embodiment is an electronic device used for implementing the method for processing information in this embodiment, a person skilled in the art can understand the specific implementation manner of the electronic device of this embodiment and various variations thereof based on the method for processing information described in this embodiment, and therefore, how to implement the method in this embodiment by the electronic device is not described in detail here. Electronic devices used by those skilled in the art to implement the method for processing information in the embodiments of the present application are all within the scope of the present application.
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 roll shifting control method for controlling a work roll of a target rolling mill to perform roll shifting, the method comprising:
determining a target rolling mode of the strip steel;
determining a target roll shifting speed of the working roll according to the target rolling mode;
and controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed.
2. The roll-shifting control method of claim 1, wherein the target rolling mode is one of the following modes: a single block rolling mode, a headless rolling mode, and a semi-headless rolling mode.
3. The roll shifting control method of claim 2, wherein determining the target roll shifting speed of the work rolls according to the target rolling mode comprises:
and if the target rolling mode is the single block rolling mode, determining the target roll shifting speed to be the single block mode roll shifting speed according to the single block rolling mode and the position of the head of the strip steel.
4. The roll shifting control method of claim 2, wherein determining the target roll shifting speed of the work rolls according to the target rolling mode comprises:
and if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, determining that the target roll shifting speed is a non-single block mode roll shifting speed.
5. The roll shifting control method according to claim 3, wherein the target rolling mill is preceded by N rolling mills, N is a positive integer greater than or equal to 2, and if the target rolling mode is the monoblock rolling mode, the controlling the target rolling mill to roll shifting based on the target roll shifting speed comprises:
when the running speed of the target rolling mill is greater than or equal to a preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when detecting that the head of the strip steel is conveyed to an inlet of a second rolling mill before the target rolling mill; or
And when the running speed of the target rolling mill is lower than the preset running speed, controlling the target rolling mill to carry out roll shifting at the single block mode roll shifting speed when detecting that the head of the strip steel is conveyed to the inlet of the previous rolling mill of the target rolling mill.
6. The roll shifting control method according to claim 3, wherein if the target rolling mode is the endless rolling mode or the semi-endless rolling mode, before the controlling the target rolling mill to perform roll shifting based on the target roll shifting speed, the method further comprises:
detecting the position of a gauge-variable point of the strip steel, wherein the gauge-variable point is the position of the strip steel rolling specification change;
the controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed comprises the following steps:
and when the variable specification point of the strip steel is detected to be transmitted to an inlet of the target rolling mill, controlling the target rolling mill to start to carry out roll shifting at the non-single block mode roll shifting speed after a first preset time period.
7. The method of roll-shifting control according to any one of claims 1 to 6, wherein the target rolling mill comprises a hydraulic cylinder servo valve, and before the controlling the target rolling mill to roll-shifting based on the target roll-shifting speed, the method further comprises: determining the roll shifting compensation speed corresponding to the hydraulic cylinder servo valve according to the target roll shifting speed and the roll shifting direction of the working roll;
the controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed comprises the following steps: and controlling the working roll to shift the roll according to the roll shifting compensation speed and the target roll shifting speed through the hydraulic cylinder servo valve.
8. A roll shifting control apparatus for controlling work rolls of a target rolling mill to perform roll shifting, the apparatus comprising:
the mode determining unit is used for determining a target rolling mode of the strip steel;
the roll shifting speed determining unit is used for determining the target roll shifting speed of the working roll according to the target rolling mode;
and the roll shifting control unit is used for controlling the target rolling mill to shift the roll based on the target roll shifting speed.
9. A rolling mill train, comprising:
a target rolling mill, wherein the target rolling mill is a rolling mill for performing work roll shifting;
the controller is used for determining a target rolling mode of the strip steel and determining a target roll shifting speed of a working roll of the target rolling mill according to the target rolling mode; and controlling the target rolling mill to carry out roll shifting based on the target roll shifting speed.
10. 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 according to any one of claims 1 to 7.
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