CN111438193B - Control method and control system for preventing rear-end collision during rolling of rough rolling slab - Google Patents
Control method and control system for preventing rear-end collision during rolling of rough rolling slab Download PDFInfo
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- CN111438193B CN111438193B CN202010240285.1A CN202010240285A CN111438193B CN 111438193 B CN111438193 B CN 111438193B CN 202010240285 A CN202010240285 A CN 202010240285A CN 111438193 B CN111438193 B CN 111438193B
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- 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
- B21B37/005—Control of time interval or spacing between workpieces
Abstract
The invention discloses a control method and a control system for preventing rear-end collision during rolling of rough rolling slabs, wherein the method comprises the following steps: after a previous plate blank is roughly rolled by a rough rolling mill and enters an inlet roller way of a finishing mill, a first real-time position of the head of the next plate blank and a second real-time position of the tail of the previous plate blank are obtained; obtaining a first time length required by the head of the next slab to reach a first limit position based on a first real-time position, wherein the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to an outlet of the intermediate cooling equipment after the rough rolling of the rough rolling mill for the first time; obtaining a second time length required by the tail of the previous plate blank to reach the first limit position based on the second real-time position; and determining whether the first time length is greater than the second time length, and if so, controlling the roughing mill to be in a rolling state.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a control method and a control system for preventing rear-end collision during rolling of a rough rolling slab.
Background
2250 in the hot rolling line, after the intermediate cooling equipment is added, when 3+3 rolling is adopted for rough rolling (3 passes of rolling by the R1 rolling mill +3 passes of rolling by the R2 rolling mill), the previous slab is finish rolled, and when the rolling rhythm is fast, the head of the next slab is likely to collide with the head of the previous slab, which causes tracking error and pushing waste.
How to solve the problem of rear-end collision after rolling by an R2 rolling mill is a key and difficult point under the situation of fast-paced production, directly influences the pushing waste and the operating rate of a plate blank, and is the key for improving the indexes such as yield, operating rate and the like.
Disclosure of Invention
The embodiment of the application provides a control method and a control system for preventing rear-end collision in rolling of rough rolling slabs, and solves the problems that in the prior art, when intermediate cooling equipment is added, when the rolling rhythm is fast, the rear-end collision condition of the head of a next slab and a previous slab is easy to generate, the tracking is mistakenly fallen and the waste is pushed.
In a first aspect, the present application provides the following technical solutions through an embodiment of the present application:
a control method for preventing rear-end collision of rough rolling slabs in rolling is applied to a control system of a rough rolling mill, wherein an intermediate cooling device and a finishing mill are arranged close to the rough rolling mill in sequence, slabs are subjected to rough rolling at the rough rolling mill and then enter the finishing mill for finish rolling through the intermediate cooling device, and the method comprises the following steps: after a previous plate blank is roughly rolled by the rough rolling mill and enters an inlet roller way of a finishing mill, acquiring a first real-time position of the head of the next plate blank and a second real-time position of the tail of the previous plate blank; obtaining a first time length required by the head of the next slab to reach a first limit position based on the first real-time position, wherein the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to an outlet of the intermediate cooling equipment after the first rough rolling of the rough rolling mill for the first time of the next slab; obtaining a second time length required by the tail of the previous plate blank to reach the first limit position based on the second real-time position; and determining whether the first time length is greater than the second time length, and if so, controlling the roughing mill to be in a rolling state.
In an embodiment, the obtaining a first time length required for the head of the next slab to reach the first limit position based on the first real-time position specifically includes: acquiring the rolling speed V1 of the roughing mill; obtaining a distance L1 between the head of the next slab and the first limit position based on the first real-time position; based on the distance L1 and the rolling speed V1, a first time period T1 required for the head of the next slab to reach a first limit position is obtained.
In one embodiment, the obtaining the distance L1 between the head of the next slab and the first extreme position based on the first real-time position specifically includes: obtaining a distance L2 between the first real-time location and an outlet of the intercooler device based on the first real-time location; obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill; obtaining a distance L3 between an outlet of the intermediate cooling apparatus and the first extreme position based on the length L3 ', wherein L3 ═ L3'; obtaining a distance L1 between the head of the next slab and the first limit position based on the distance L2 and the distance L3, wherein L1 is L2+ L3; obtaining a first time length T1 required for the head of the next slab to reach the first limit position based on a formula T1L 1/V1.
In an embodiment, the obtaining, based on the second real-time position, a second time length required for the tail of the previous slab to reach the first limit position specifically includes: acquiring a roller way speed V2 of the finishing mill inlet roller way; obtaining a distance L4 between the tail of the previous slab and the first extreme position based on the second real-time position; and obtaining a second time length T2 required by the tail of the previous plate blank to reach the first limit position based on the distance L4 and the roller way speed V1.
In an embodiment, the obtaining the distance L4 between the tail of the previous slab and the first limit position based on the second real-time position specifically includes: obtaining a distance L5 between the tail of the previous slab and the outlet of the intermediate cooling device; obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill; obtaining a distance L3 between an outlet of the intermediate cooling apparatus and the first extreme position based on the length L3 ', wherein L3 ═ L3'; obtaining a distance L4 between the tail of the previous slab and the first limit position based on the distance L5 and the distance L3, wherein L4 is L3-L5; and obtaining a second time length T2 required for the tail of the previous slab to reach the first limit position based on the formula T2L 4/V2.
In an embodiment, the obtaining the length L3' of the next slab after the first pass of rough rolling in the rough rolling mill specifically includes: acquiring the rolling reduction of the roughing mill and first size information of the next plate blank before being rolled by the roughing mill, wherein the first size information comprises: length, thickness, width; according to the law of volume invariance, second size information of the next slab after the first pass of rough rolling of the roughing mill is obtained based on the rolling reduction of the roughing mill and the first size information, and the second size information comprises: length, thickness, width; and obtaining the length L3' of the next plate blank after the first pass of rough rolling of the rough rolling mill based on the second dimension information.
In one embodiment, before obtaining the first time length required for the head of the next slab to reach the first limit position based on the first real-time position, the method further includes: judging whether the head of the next plate blank reaches the inlet of the roughing mill or not based on the first real-time position; when the head of the next slab reaches the entrance of the roughing mill, obtaining a first time length T1 required for the head of the next slab to reach a first limit position based on the first real-time position, specifically including: acquiring the rolling speed V1 of the roughing mill; obtaining a distance L6 between an inlet of the roughing mill and an outlet of the intermediate cooling apparatus based on the first real-time position; obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill; obtaining a distance L3 between an outlet of the intermediate cooling apparatus and the first extreme position based on the length L3 ', wherein L3 ═ L3'; obtaining a distance L1 between the head of the next slab and the first limit position based on the distance L6 and the distance L3, wherein L1 is L6+ L3; obtaining a first time length T1 required for the head of the next slab to reach the first limit position based on a formula T1L 1/V1.
In a second aspect, the present application provides the following technical solutions through an embodiment of the present application:
a control system of a roughing mill, which is adjacent to the roughing mill and sequentially comprises an intermediate cooling device and a finishing mill, wherein a plate blank enters the finishing mill for finish rolling through the intermediate cooling device after being roughly rolled at the roughing mill, and the system comprises: the acquisition unit is used for acquiring a first real-time position of the head of the next plate blank and a second real-time position of the tail of the previous plate blank after the previous plate blank enters an inlet roller way of a finishing mill through rough rolling of the rough rolling mill; a first obtaining unit, configured to obtain, based on the first real-time position, a first time length required for the head of the next slab to reach a first limit position, where the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to an outlet of the intermediate cooling device after the first pass of rough rolling of the rough rolling mill for the next slab; a second obtaining unit, configured to obtain, based on the second real-time position, a second time length required for the tail of the previous slab to reach the first limit position; and the control unit is used for determining whether the first time length is greater than the second time length, and if so, controlling the roughing mill to be in a rolling state.
In a third aspect, the present application provides the following technical solutions through an embodiment of the present application:
an electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor when executing the program may perform the method steps as in any of the embodiments described above.
In a fourth aspect, the present application provides the following technical solutions through an embodiment of the present application:
a computer storage medium having stored thereon a computer program which, when executed by a processor, may carry out the method steps of any of the embodiments described above.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
this application is through the first real-time position of real-time supervision next slab head and the second real-time position of last slab afterbody, prejudge in advance that the first time length that the first extreme position was arrived from current first real-time position to next slab head, and the second time length that the first extreme position was arrived from current second real-time position to last slab afterbody, when first time length is greater than the second time length, guarantee that next slab reachs first extreme position promptly, when last slab should just leave from first extreme position, just control roughing mill for the state of can rolling, can roll under the state, roughing mill can start the roughing to next slab, this application can avoid under the fast rolling, push away useless and unusual rhythm that the slab chased after caused.
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 flowchart of a control method for preventing rear-end collision in rolling of a rough rolling slab according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an inlet of a roughing mill to a finishing mill provided in an embodiment of the present application;
FIG. 3 is a block diagram of a control system for preventing rolling rear-end collision of a rough rolling slab according to an embodiment of the present disclosure;
fig. 4 is an architecture diagram of an electronic device according to an embodiment of the present application;
fig. 5 is an architecture diagram of a computer storage medium according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a control method and a control system for preventing rear-end collision in rolling of rough rolling slabs, and solves the problems that in the prior art, when intermediate cooling equipment is added, when the rolling rhythm is fast, the rear-end collision condition of the head of a next slab and a previous slab is easy to generate, the tracking is mistakenly fallen and the waste is pushed.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a control method for preventing rear-end collision of rough rolling slabs in rolling is applied to a control system of a rough rolling mill, wherein an intermediate cooling device and a finishing mill are arranged close to the rough rolling mill in sequence, slabs are subjected to rough rolling at the rough rolling mill and then enter the finishing mill for finish rolling through the intermediate cooling device, and the method comprises the following steps: after a previous plate blank is roughly rolled by the rough rolling mill and enters an inlet roller way of a finishing mill, acquiring a first real-time position of the head of the next plate blank and a second real-time position of the tail of the previous plate blank; obtaining a first time length required by the head of the next slab to reach a first limit position based on the first real-time position, wherein the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to an outlet of the intermediate cooling equipment after the first rough rolling of the rough rolling mill for the first time of the next slab; obtaining a second time length required by the tail of the previous plate blank to reach the first limit position based on the second real-time position; and determining whether the first time length is greater than the second time length, and if so, controlling the roughing mill to be in a rolling state.
This application is through the first real-time position of real-time supervision next slab head and the second real-time position of last slab afterbody, prejudge in advance that the first time length that the first extreme position was arrived from current first real-time position to next slab head, and the second time length that the first extreme position was arrived from current second real-time position to last slab afterbody, when first time length is greater than the second time length, guarantee that next slab reachs first extreme position promptly, when last slab should just leave from first extreme position, just control roughing mill for the state of can rolling, can roll under the state, roughing mill can start the roughing to next slab, this application can avoid under the fast rolling, push away useless and unusual rhythm that the slab chased after caused.
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.
Example one
As shown in fig. 1 and 2, the present embodiment provides a control method for preventing rolling rear-end collision of a rough rolling slab, which is applied to a control system of a rough rolling mill, wherein an intermediate cooling device 2 and a finishing mill are arranged in sequence adjacent to the rough rolling mill 1, and the slab enters the finishing mill for finish rolling through the intermediate cooling device 2 after rough rolling at the rough rolling mill 1, and the method includes:
step S101: after a previous plate blank is roughly rolled by the rough rolling mill 1 and enters the finishing mill inlet roller table 3, a first real-time position of the head of the next plate blank and a second real-time position of the tail of the previous plate blank are obtained;
step S102: based on the first real-time position, obtaining a first time length required for the head of the next slab to reach a first limit position, wherein the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to the outlet of the intermediate cooling device 2 after the first rough rolling of the rough rolling mill 1 for the first time;
step S103: obtaining a second time length required by the tail of the previous plate blank to reach the first limit position based on the second real-time position;
step S104: and determining whether the first time length is greater than the second time length, and if so, controlling the roughing mill 1 to be in a rolling state.
In practical application, after three rough rolling passes through the R2 rough rolling mill 1, the rough rolling (the thickness required by the slab to the finish rolling mill inlet) is calculated, the slab after the rough rolling is cooled by the intermediate cooling device 2 (for slab cooling, ensuring the temperature of the slab entering the finish rolling inlet and reducing the waiting time), and then enters the finish rolling mill for finish rolling through the finish rolling mill inlet roller bed 3 (for conveying the slab to the finish rolling mill, the roller bed is provided with an encoder for detecting the roller bed speed).
The rough rolling of the R2 rough rolling mill 1 comprises the following three rough rolling passes:
the first time: the slab is roughly rolled by an R2 rough rolling mill 1, and then enters an intermediate cooling device 2 for cooling (at this time, the tail of the slab moves to the outlet of the intermediate cooling device 2)
And (3) a second pass: the slab is transported back to the R2 rough mill 1 by the intermediate cooling equipment 2 to be rolled back;
and a third step: the slab subjected to the back rolling is subjected to the rough rolling again by the R2 rough rolling mill 1, and then enters the intermediate cooling device 2 to be cooled (at this time, the tail of the slab moves to the outlet of the intermediate cooling device 2).
The inventor finds, through long-term practice, that a rear-end collision accident under a fast rolling rhythm occurs after a previous slab enters the finishing mill inlet roller way 3 through rough rolling of the rough rolling mill 1, and when a next slab passes through the rough rolling mill 1 for a first pass, the reason is that the rolling speed of the finishing mill is slower than that of the rough rolling mill 1, the previous slab easily occupies the finishing mill inlet roller way 3 for a long time, and due to the addition of the intermediate cooling device 2, the head of the next slab needs to enter the intermediate cooling device 2 for cooling during the first pass of rolling (the head moves furthest to a first limit position during the cooling of the next slab), and at this time, if the fast rolling rhythm is adopted, the head of the next slab coming out of the intermediate cooling device 2 easily collides with the tail of the previous slab occupying the finishing mill inlet roller way 3.
In the traditional production process, in order to avoid rear-end collision between two front and back plate blanks, when the tail part of the last plate blank does not leave the first limit position, the rolling of the next plate blank is not started. The inventor finds that in the conventional technology, in order to avoid rear-end collision between the front and rear plate blanks, operators waste a large amount of working hours, and the requirements of fast-paced rolling cannot be met.
In order to avoid rear-end collision between two front and rear slabs and improve the rolling rhythm as much as possible, the method monitors a first real-time position of the head of the next slab and a second real-time position of the tail of the previous slab in real time, and pre-judges a first time length required by the head of the next slab to reach a first limit position from the current first real-time position and a second time length required by the tail of the previous slab to reach the first limit position from the current second real-time position in advance, when the first time length is longer than the second time length, i.e. to ensure that the next slab reaches the first extreme position, from which the previous slab should have just left, the roughing mill 1 is controlled to be in a rolling-enabled state, and in the rolling-enabled state, the roughing mill 1 can start roughing for the next slab, the rolling method and the rolling device have the advantages that rolling is started at the second real-time position of the first limit position which is not reached by the tail of the last slab, and the rolling rhythm can be improved to a certain extent.
In order to avoid the collision between the next slab and the previous slab, the invention conception of the application is as follows: since the next slab cannot move further after the first extreme position, it is at least ensured that the preceding slab has just left the first extreme position when the next slab reaches the first extreme position. In other words, the process that the next slab moves from the current first real-time position to the first limit position is also the process that the previous slab moves from the second real-time position to the first limit position, and when the two slabs meet at the first limit position, the rear-end collision accident can not happen because the next slab can not move forward any more.
In order to avoid rear-end collision at the first limit position, the application needs to ensure that the first duration is longer than the second duration, but not equal to the second duration, and as for the size of the first duration, the first duration is not limited herein, and it needs to be noted that the larger the difference between the first duration and the second duration, the slower the rolling rhythm is.
As an optional embodiment, the obtaining a first time length required for the head of the next slab to reach the first limit position based on the first real-time position specifically includes:
acquiring the rolling speed V1 of the roughing mill 1;
obtaining a distance L1 between the head of the next slab and the first limit position based on the first real-time position;
based on the distance L1 and the rolling speed V1, a first time period T1 required for the head of the next slab to reach a first limit position is obtained.
As an optional embodiment, the obtaining the distance L1 between the head of the next slab and the first limit position based on the first real-time position specifically includes:
obtaining a distance L2 between the first real-time position and an outlet of the intercooler device 2 based on the first real-time position;
obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill 1;
obtaining a distance L3 between the outlet of the intermediate cooling apparatus 2 and the first extreme position based on the length L3 ', wherein L3 is L3';
obtaining a distance L1 between the head of the next slab and the first limit position based on the distance L2 and the distance L3, wherein L1 is L2+ L3;
obtaining a first time length T1 required for the head of the next slab to reach the first limit position based on a formula T1L 1/V1.
In the first pass, the speed at which the slab moves from the roughing mill 1 to the intermediate cooling facility 2 is the rolling speed V1 of the roughing mill 1, and the distance L3 from the first limit position to the outlet of the intermediate cooling facility 2 is the length L3' of the next slab after the first pass, and the length of the next slab after the first pass is changed and is not the length before the rolling.
As an optional embodiment, the obtaining, based on the second real-time position, a second time length required for the tail of the previous slab to reach the first limit position specifically includes:
acquiring a roller way speed V2 of the finishing mill inlet roller way 3;
obtaining a distance L4 between the tail of the previous slab and the first extreme position based on the second real-time position;
and obtaining a second time length T2 required by the tail of the previous plate blank to reach the first limit position based on the distance L4 and the roller way speed V1.
As an optional embodiment, the obtaining the distance L4 between the tail of the previous slab and the first extreme position based on the second real-time position specifically includes:
obtaining a distance L5 between the tail of the previous slab and the outlet of the intermediate cooling apparatus 2;
obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill 1;
obtaining a distance L3 between the outlet of the intermediate cooling apparatus 2 and the first extreme position based on the length L3 ', wherein L3 is L3';
obtaining a distance L4 between the tail of the previous slab and the first limit position based on the distance L5 and the distance L3, wherein L4 is L3-L5;
and obtaining a second time length T2 required for the tail of the previous slab to reach the first limit position based on the formula T2L 4/V2.
It should be noted that the moving speed of the previous slab waiting to be rolled or being rolled on the finishing mill inlet roller table 3 is the roller table speed V2 of the finishing mill inlet roller table 3, and the distance between the first limit position and the second real-time position of the tail of the previous slab may be compared by using the outlet position of the intermediate cooling device 2 as a reference point, so as to obtain the distance between the two.
As an alternative embodiment, the obtaining of the length L3' of the next slab after the first rough rolling pass of the rough rolling mill 1 specifically includes:
acquiring the rolling reduction of the roughing mill 1 and first size information of the next slab before being rolled by the roughing mill 1, wherein the first size information comprises: length, thickness, width;
according to the law of volume invariance, second size information of the next slab after the first pass of rough rolling of the roughing mill 1 is obtained based on the rolling reduction of the roughing mill 1 and the first size information, and the second size information comprises: length, thickness, width;
and obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill 1 based on the second dimension information.
In addition, since the rough rolling mill 1 keeps the volume during rough rolling, and the width of the slab before and after rolling is not changed, and the thickness of the slab is reduced by the reduction of the rolls to extend the length, the second size information after the first pass of rough rolling by the rough rolling mill 1 can be obtained based on the reduction (the change amount of the thickness) of the rough rolling mill 1 and the first size information according to the law of the volume invariance, and the length L3' of the next slab after the first pass of rough rolling by the rough rolling mill 1 can be obtained.
As an optional embodiment, before obtaining the first time length required for the head of the next slab to reach the first limit position based on the first real-time position, the method further includes:
judging whether the head of the next plate blank reaches the inlet of the roughing mill 1 or not based on the first real-time position;
when the head of the next slab reaches the entrance of the roughing mill 1, obtaining a first time length T1 required for the head of the next slab to reach a first limit position based on the first real-time position, specifically including:
acquiring the rolling speed V1 of the roughing mill 1;
obtaining a distance L6 between the inlet of the roughing mill 1 and the outlet of the intermediate cooling plant 2 based on the first real-time position;
obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill 1;
obtaining a distance L3 between the outlet of the intermediate cooling apparatus 2 and the first extreme position based on the length L3 ', wherein L3 is L3';
obtaining a distance L1 between the head of the next slab and the first limit position based on the distance L6 and the distance L3, wherein L1 is L6+ L3;
obtaining a first time length T1 required for the head of the next slab to reach the first limit position based on a formula T1L 1/V1.
In practice, the distance L6 between the inlet of the roughing mill 1 and the outlet of the intermediate cooling installation 2 is typically 37 m. In this embodiment, when the head of the next slab reaches the inlet of the roughing mill 1, it is determined whether (37+ L3)/V1> (L3-L5)/V2 is established, and when the establishment is established, the R2 rolling mill can bite the first pass of steel rolling.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
this application is through the first real-time position of real-time supervision next slab head and the second real-time position of last slab afterbody, prejudge in advance that the first time length that the first extreme position was arrived from current first real-time position to next slab head, and the second time length that the first extreme position was arrived from current second real-time position to last slab afterbody, when first time length is greater than the second time length, guarantee that next slab reachs first extreme position promptly, when last slab should just leave from first extreme position, just control roughing mill 1 for the rolling state, can roll under the state, roughing mill 1 can begin the roughing to next slab, this application can avoid under the fast rolling rhythm, push away useless and unusual the shut down that the slab rear-end caused.
Example two
Based on the same inventive concept, as shown in fig. 2 and 3, the present embodiment provides a control system of a roughing mill 1, which is adjacent to the roughing mill 1 and sequentially comprises an intermediate cooling device 2 and a finishing mill, wherein a slab is rough-rolled at the roughing mill 1 and then enters the finishing mill for finish rolling through the intermediate cooling device 2, and the system comprises:
the obtaining unit 201 is configured to obtain a first real-time position of a head of a next slab and a second real-time position of a tail of a previous slab after the previous slab enters the finishing mill inlet roller bed 3 through the rough rolling of the rough rolling mill 1;
a first obtaining unit 202, configured to obtain, based on the first real-time position, a first time length required for the head of the next slab to reach a first limit position, where the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to the outlet of the intermediate cooling apparatus 2 after the first pass of rough rolling of the rough rolling mill 1 is performed on the next slab;
a second obtaining unit 203, configured to obtain, based on the second real-time position, a second time length required for the tail of the previous slab to reach the first limit position;
a control unit 204, configured to determine whether the first duration is greater than the second duration, and if so, control the roughing mill 1 to be in a rolling-enabled state.
As an optional embodiment, the first obtaining unit 202 is specifically configured to:
acquiring the rolling speed V1 of the roughing mill 1;
obtaining a distance L1 between the head of the next slab and the first limit position based on the first real-time position;
based on the distance L1 and the rolling speed V1, a first time period T1 required for the head of the next slab to reach a first limit position is obtained.
As an alternative embodiment, the first obtaining unit 202 is further configured to:
obtaining a distance L2 between the first real-time position and an outlet of the intercooler device 2 based on the first real-time position;
obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill 1;
obtaining a distance L3 between the outlet of the intermediate cooling apparatus 2 and the first extreme position based on the length L3 ', wherein L3 is L3';
obtaining a distance L1 between the head of the next slab and the first limit position based on the distance L2 and the distance L3, wherein L1 is L2+ L3;
obtaining a first time length T1 required for the head of the next slab to reach the first limit position based on a formula T1L 1/V1.
As an optional embodiment, the second obtaining unit 203 is specifically configured to:
acquiring a roller way speed V2 of the finishing mill inlet roller way 3;
obtaining a distance L4 between the tail of the previous slab and the first extreme position based on the second real-time position;
and obtaining a second time length T2 required by the tail of the previous plate blank to reach the first limit position based on the distance L4 and the roller way speed V1.
As an alternative embodiment, the second obtaining unit 203 is further configured to:
obtaining a distance L5 between the tail of the previous slab and the outlet of the intermediate cooling apparatus 2;
obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill 1;
obtaining a distance L3 between the outlet of the intermediate cooling apparatus 2 and the first extreme position based on the length L3 ', wherein L3 is L3';
obtaining a distance L4 between the tail of the previous slab and the first limit position based on the distance L5 and the distance L3, wherein L4 is L3-L5;
and obtaining a second time length T2 required for the tail of the previous slab to reach the first limit position based on the formula T2L 4/V2.
As an alternative embodiment, the first obtaining unit 202 and the second obtaining unit 203 are further configured to:
acquiring the rolling reduction of the roughing mill 1 and first size information of the next slab before being rolled by the roughing mill 1, wherein the first size information comprises: length, thickness, width;
according to the law of volume invariance, second size information of the next slab after the first pass of rough rolling of the roughing mill 1 is obtained based on the rolling reduction of the roughing mill 1 and the first size information, and the second size information comprises: length, thickness, width;
and obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill 1 based on the second dimension information.
As an alternative embodiment, the control system further comprises:
a judging module, configured to judge whether the head of the next slab reaches the inlet of the roughing mill 1 based on the first real-time position before the first time required for the head of the next slab to reach the first limit position is obtained based on the first real-time position;
when the head of the next slab reaches the inlet of the roughing mill 1, the first obtaining unit 202 is also configured to:
acquiring the rolling speed V1 of the roughing mill 1;
obtaining a distance L6 between the inlet of the roughing mill 1 and the outlet of the intermediate cooling plant 2 based on the first real-time position;
obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill 1;
obtaining a distance L3 between the outlet of the intermediate cooling apparatus 2 and the first extreme position based on the length L3 ', wherein L3 is L3';
obtaining a distance L1 between the head of the next slab and the first limit position based on the distance L6 and the distance L3, wherein L1 is L6+ L3;
obtaining a first time length T1 required for the head of the next slab to reach the first limit position based on a formula T1L 1/V1.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
this application is through the first real-time position of real-time supervision next slab head and the second real-time position of last slab afterbody, prejudge in advance that the first time length that the first extreme position was arrived from current first real-time position to next slab head, and the second time length that the first extreme position was arrived from current second real-time position to last slab afterbody, when first time length is greater than the second time length, guarantee that next slab reachs first extreme position promptly, when last slab should just leave from first extreme position, just control roughing mill 1 for the rolling state, can roll under the state, roughing mill 1 can begin the roughing to next slab, this application can avoid under the fast rolling rhythm, push away useless and unusual the shut down that the slab rear-end caused.
EXAMPLE III
Based on the same inventive concept, as shown in fig. 4, an electronic device 300 includes a memory 310, a processor 320, and a computer program 311 stored on the memory 310 and executable on the processor 320, and when the processor 320 executes the computer program 311, the following method steps can be implemented:
after a previous plate blank is roughly rolled by the rough rolling mill 1 and enters the finishing mill inlet roller table 3, a first real-time position of the head of the next plate blank and a second real-time position of the tail of the previous plate blank are obtained; based on the first real-time position, obtaining a first time length required for the head of the next slab to reach a first limit position, wherein the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to the outlet of the intermediate cooling device 2 after the first rough rolling of the rough rolling mill 1 for the first time; obtaining a second time length required by the tail of the previous plate blank to reach the first limit position based on the second real-time position; and determining whether the first time length is greater than the second time length, and if so, controlling the roughing mill 1 to be in a rolling state.
In a specific implementation, when the processor 320 executes the program 311, any method steps in the first embodiment may also be implemented.
Example four
Based on the same inventive concept, as shown in fig. 5, the present embodiment provides a computer storage medium 400, on which a computer program 411 is stored, which computer program 411, when being executed by a processor, may realize the following method steps:
after a previous plate blank is roughly rolled by the rough rolling mill 1 and enters the finishing mill inlet roller table 3, a first real-time position of the head of the next plate blank and a second real-time position of the tail of the previous plate blank are obtained; based on the first real-time position, obtaining a first time length required for the head of the next slab to reach a first limit position, wherein the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to the outlet of the intermediate cooling device 2 after the first rough rolling of the rough rolling mill 1 for the first time; obtaining a second time length required by the tail of the previous plate blank to reach the first limit position based on the second real-time position; and determining whether the first time length is greater than the second time length, and if so, controlling the roughing mill 1 to be in a rolling state.
In a specific implementation, the computer program 411 may implement any of the method steps of the first embodiment when executed by a processor.
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 control method for preventing rear-end collision of a rough rolling plate blank in rolling is characterized in that the control method is applied to a control system of a rough rolling machine, an intermediate cooling device and a finishing rolling machine are arranged next to the rough rolling machine in sequence, and the plate blank enters the finishing rolling machine for finish rolling through the intermediate cooling device after rough rolling at the rough rolling machine, wherein the method comprises the following steps:
after a previous plate blank is roughly rolled by the rough rolling mill and enters an inlet roller way of a finishing mill, acquiring a first real-time position of the head of the next plate blank and a second real-time position of the tail of the previous plate blank;
obtaining a first time length required by the head of the next slab to reach a first limit position based on the first real-time position, wherein the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to an outlet of the intermediate cooling equipment after the first rough rolling of the rough rolling mill for the first time of the next slab;
obtaining a second time length required by the tail of the previous plate blank to reach the first limit position based on the second real-time position;
and determining whether the first time length is greater than the second time length, and if so, controlling the roughing mill to be in a rolling state.
2. The control method for preventing rear-end collision in rolling of rough rolling slabs according to claim 1, wherein the obtaining of the first duration required for the head of the next slab to reach the first limit position based on the first real-time position comprises:
acquiring the rolling speed V1 of the roughing mill;
obtaining a distance L1 between the head of the next slab and the first limit position based on the first real-time position;
based on the distance L1 and the rolling speed V1, a first time period T1 required for the head of the next slab to reach a first limit position is obtained.
3. The control method for preventing rear-end collision of rolling of a rough rolling slab as set forth in claim 2, wherein the obtaining of the distance L1 between the head of the next slab and the first limit position based on the first real-time position specifically comprises:
obtaining a distance L2 between the first real-time location and an outlet of the intercooler device based on the first real-time location;
obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill;
obtaining a distance L3 between an outlet of the intermediate cooling apparatus and the first extreme position based on the length L3 ', wherein L3 ═ L3';
obtaining a distance L1 between the head of the next slab and the first limit position based on the distance L2 and the distance L3, wherein L1 is L2+ L3;
obtaining a first time length T1 required for the head of the next slab to reach the first limit position based on a formula T1L 1/V1.
4. The control method for preventing the rolling rear-end collision of the rough rolling slab as set forth in claim 2, wherein the obtaining of the second time period required for the tail of the previous slab to reach the first limit position based on the second real-time position specifically comprises:
acquiring a roller way speed V2 of the finishing mill inlet roller way;
obtaining a distance L4 between the tail of the previous slab and the first extreme position based on the second real-time position;
and obtaining a second time length T2 required by the tail of the previous plate blank to reach the first limit position based on the distance L4 and the roller way speed V2.
5. The control method for preventing the rolling rear-end collision of the rough rolling slab as set forth in claim 4, wherein the obtaining the distance L4 between the tail of the previous slab and the first limit position based on the second real-time position comprises:
obtaining a distance L5 between the tail of the previous slab and the outlet of the intermediate cooling device;
obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill;
obtaining a distance L3 between an outlet of the intermediate cooling apparatus and the first extreme position based on the length L3 ', wherein L3 ═ L3';
obtaining a distance L4 between the tail of the previous slab and the first limit position based on the distance L5 and the distance L3, wherein L4 is L3-L5;
and obtaining a second time length T2 required for the tail of the previous slab to reach the first limit position based on the formula T2L 4/V2.
6. The control method for preventing the rear-end collision of the rough rolling slab rolling according to claim 3 or 5, wherein the obtaining of the length L3' of the next slab after the first pass of the rough rolling mill specifically comprises:
acquiring the rolling reduction of the roughing mill and first size information of the next plate blank before being rolled by the roughing mill, wherein the first size information comprises: length and thickness, and width;
according to the law of volume invariance, second size information of the next slab after the first pass of rough rolling of the roughing mill is obtained based on the rolling reduction of the roughing mill and the first size information, and the second size information comprises: length and thickness, and width;
and obtaining the length L3' of the next plate blank after the first pass of rough rolling of the rough rolling mill based on the second dimension information.
7. The control method for preventing the rolling rear-end collision of the rough rolling slab as set forth in claim 2, wherein before obtaining the first time period required for the head of the next slab to reach the first limit position based on the first real-time position, further comprising:
judging whether the head of the next plate blank reaches the inlet of the roughing mill or not based on the first real-time position;
when the head of the next slab reaches the entrance of the roughing mill, obtaining a first time length T1 required for the head of the next slab to reach a first limit position based on the first real-time position, specifically including:
acquiring the rolling speed V1 of the roughing mill;
obtaining a distance L6 between an inlet of the roughing mill and an outlet of the intermediate cooling apparatus based on the first real-time position;
obtaining the length L3' of the next slab after the first pass of rough rolling of the rough rolling mill;
obtaining a distance L3 between an outlet of the intermediate cooling apparatus and the first extreme position based on the length L3 ', wherein L3 ═ L3';
obtaining a distance L1 between the head of the next slab and the first limit position based on the distance L6 and the distance L3, wherein L1 is L6+ L3;
obtaining a first time length T1 required for the head of the next slab to reach the first limit position based on a formula T1L 1/V1.
8. A control system of a roughing mill is characterized in that an intermediate cooling device and a finishing mill are arranged next to the roughing mill in sequence, a plate blank enters the finishing mill for finish rolling through the intermediate cooling device after being roughly rolled at the roughing mill, and the system comprises:
the acquisition unit is used for acquiring a first real-time position of the head of the next plate blank and a second real-time position of the tail of the previous plate blank after the previous plate blank enters an inlet roller way of a finishing mill through rough rolling of the rough rolling mill;
a first obtaining unit, configured to obtain, based on the first real-time position, a first time length required for the head of the next slab to reach a first limit position, where the first limit position is a position corresponding to the head of the next slab when the tail of the next slab moves to an outlet of the intermediate cooling device after the first pass of rough rolling of the rough rolling mill for the next slab;
a second obtaining unit, configured to obtain, based on the second real-time position, a second time length required for the tail of the previous slab to reach the first limit position;
and the control unit is used for determining whether the first time length is greater than the second time length, and if so, controlling the roughing mill to be in a rolling state.
9. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor is capable of implementing the method steps of any of claims 1 to 7 when executing the program.
10. A computer-readable storage medium having a computer program stored thereon, comprising: the program may, when executed by a processor, implement the method steps of any of claims 1 to 7.
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| CN113996654B (en) * | 2020-07-28 | 2024-03-08 | 宝山钢铁股份有限公司 | Operation control method of roughing mill |
| CN111906150A (en) * | 2020-07-29 | 2020-11-10 | 盐城市联鑫钢铁有限公司 | Steel rolling rear-end collision prevention early warning method and system |
| CN113649412A (en) * | 2021-07-19 | 2021-11-16 | 首钢京唐钢铁联合有限责任公司 | Hot rolling wire binding control method and device |
| CN114700377B (en) * | 2022-03-28 | 2023-10-17 | 北京京诚瑞达电气工程技术有限公司 | Method and system for controlling head-removing rolling |
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