CN113649412A - Hot rolling wire binding control method and device - Google Patents
Hot rolling wire binding control method and device Download PDFInfo
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- CN113649412A CN113649412A CN202110815703.XA CN202110815703A CN113649412A CN 113649412 A CN113649412 A CN 113649412A CN 202110815703 A CN202110815703 A CN 202110815703A CN 113649412 A CN113649412 A CN 113649412A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005098 hot rolling Methods 0.000 title claims abstract description 31
- 238000005096 rolling process Methods 0.000 claims abstract description 224
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
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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
- B21B37/005—Control of time interval or spacing between workpieces
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Abstract
The invention discloses a hot rolling wire binding control method and a device, which are applied to a hot rolling system, wherein the system comprises the following components: the device comprises a first rolling mill, a second rolling mill, a plurality of detectors and a conveying roller way, wherein the detectors are sequentially arranged according to processes, and the method comprises the following steps: controlling a second plate blank to enter the first rolling mill for rolling; when the second slab runs to the position below the third detector, the distance from the tail of the first slab to the position right below the fifth detector is acquired; and controlling the second plate blank to move to the second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below a fifth detector. The technical problems that in the prior art, the rolling gap time of two plate blanks is large and the fault rate of a production line is high are solved, the rolling efficiency is improved, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a hot rolling binding wire control method and device.
Background
In the hot rolling process, the rough rolling of a hot rolling line adopts a 1+5 rolling mode, the fifth pass of the previous plate blank bites steel in a second rolling mill, and the later plate blank bites steel in a first rolling mill. However, after the previous slab is rolled in the second rolling mill, the next slab has not yet reached the entrance of the second rolling mill. The rolling gap time of the two plate blanks is too long, the production line and the productivity and the efficiency performance are influenced, and the reduction of the production cost is not facilitated.
Disclosure of Invention
The embodiment of the application provides a hot rolling wire binding control method and device, solves the technical problems that in the prior art, the rolling gap time of two plate blanks is large and the fault rate of a production line is high, and achieves the technical effects of improving the rolling efficiency and further reducing the production cost.
On one hand, the present application provides the following technical solutions through an embodiment of the present application:
a hot rolling wire binding control method is applied to a hot rolling system, and the system comprises: the device comprises a first rolling mill, a second rolling mill, a plurality of detectors and a conveying roller way, wherein the detectors are sequentially arranged according to processes, and the method comprises the following steps:
controlling a second plate blank to enter the first rolling mill for rolling;
when the second slab runs to the position below the third detector, the distance from the tail of the first slab to the position right below the fifth detector is acquired;
and controlling the second plate blank to move to the second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below a fifth detector.
Preferably, the controlling the second slab to run to the second rolling mill to start the subsequent rolling based on the distance from the tail of the first slab to the position right below a fifth detector comprises:
if it is
When the second plate blank is rolled, controlling the second plate blank to move forwards until the second rolling mill starts to perform subsequent rolling;
if it is
When the second plate blank stops moving forwards, the second plate blank is controlled to stop moving forwards
When the second plate blank is rolled, controlling the second plate blank to move forwards to the second rolling mill to start subsequent rolling;
wherein, L is2The distance from the tail part of the first slab to the position right below a fifth detector, L1Is the distance, V, between the third and fourth detectors2For the rolling speed, V, of the first slab in the second rolling mill1The running speed of the roller way.
Preferably, said controlling the second slab to enter said first rolling mill for rolling comprises:
and when the first plate blank is rolled for the penultimate time in the second rolling mill, delaying for 1-3 seconds to control the second plate blank to enter the first rolling mill for rolling.
Preferably, said controlling the second slab to enter said first rolling mill for rolling comprises:
and when the first plate blank is rolled for the penultimate time in the second rolling mill, controlling the second plate blank to enter the first rolling mill for rolling.
Preferably, said controlling said second slab to run to said second rolling mill to start a subsequent rolling comprises:
and after the second plate blank is rolled for the penultimate time, the last rolling is started again at an interval of 10 seconds.
Preferably, the method comprises the following steps: each plate blank is rolled once in the first rolling mill and five times in the second rolling mill respectively; each slab is rolled in the first rolling mill three times and in the second rolling mill three times.
On the other hand, the present application provides the following technical solutions through an embodiment of the present application:
a hot rolling wire tying control device comprising:
the first control unit is used for controlling a second plate blank to enter the first rolling mill for rolling;
the acquisition unit is used for acquiring the distance from the tail of the first slab to the position right below the fifth detector when the second slab runs to the position below the third detector;
and the second control unit is used for controlling the second plate blank to run to the second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below the fifth detector.
Preferably, the first control unit is further configured to:
and when the first plate blank is rolled for the penultimate time in the second rolling mill, delaying for 1-3 seconds to control the second plate blank to enter the first rolling mill for rolling.
Preferably, the first control unit is further configured to:
and when the first plate blank is rolled for the penultimate time in the second rolling mill, controlling the second plate blank to enter the first rolling mill for rolling.
Preferably, the second control unit is further configured to:
if it is
When the second plate blank is rolled, controlling the second plate blank to move forwards until the second rolling mill starts to perform subsequent rolling;
if it is
When the second plate blank stops moving forwards, the second plate blank is controlled to stop moving forwards
Time, controlMaking the second plate blank move forward to the second rolling mill to start subsequent rolling;
wherein, L is2The distance from the tail part of the first slab to the position right below a fifth detector, L1Is the distance, V, between the third and fourth detectors2For the rolling speed, V, of the first slab in the second rolling mill1The running speed of the roller way.
Preferably, the second control unit is further configured to:
and after the second plate blank is rolled for the penultimate time, the last rolling is started again at an interval of 10 seconds.
Preferably, the method comprises the following steps:
the first control unit is configured to: each plate blank is rolled once in the first rolling mill and five times in the second rolling mill respectively;
and the second control unit is used for controlling each plate blank to be rolled for three times in the first rolling mill and to be rolled for three times in the second rolling mill.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the embodiment of the application provides a hot rolling wire binding control method and device, the method obtains the distance from the tail of a first plate blank to the position right below a fifth detector when the second plate blank runs to the position below the third detector, and then controls the second plate blank to run to a second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below the fifth detector. The rolling time gap between the front and the rear slabs can be reduced, and the situation that the fourth detector and the fifth detector detect the slabs simultaneously so that the system considers the front and the rear slabs to be the same slabs can be avoided. Furthermore, the fault rate of the production line is reduced. The technical problems that in the prior art, the rolling gap time of two plate blanks is large and the fault rate of a production line is high are solved, the rolling efficiency is improved, and the production cost is reduced.
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 view showing the structure of a hot rolling system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a hot rolling tie-line control method according to an embodiment of the present invention;
FIG. 3 is a block diagram of a hot rolling binder control apparatus according to an embodiment of the present invention.
Detailed Description
The embodiment of the application provides a hot rolling wire binding control method and device, solves the technical problems that in the prior art, the rolling gap time of two plate blanks is large and the fault rate of a production line is high, and achieves the technical effects of improving the rolling efficiency and further reducing the production cost.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a hot rolling wire binding control method is applied to a hot rolling system, and the system comprises: the device comprises a first rolling mill, a second rolling mill, a plurality of detectors and a conveying roller way, wherein the detectors are sequentially arranged according to processes, and the method comprises the following steps:
controlling a second plate blank to enter the first rolling mill for rolling;
when the second slab runs to the position below the third detector, the distance from the tail of the first slab to the position right below the fifth detector is acquired;
and controlling the second plate blank to move to the second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below a fifth detector.
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 provides a hot rolling wire binding control method, which is applied to a hot rolling system, as shown in fig. 1, the system comprises: first rolling mill 8, second rolling mill 9, a plurality of detectors and rollgang 14, wherein, a plurality of detectors include: the detector comprises a first detector 1, a second detector 2, a third detector 3, a fourth detector 4, a fifth detector 5, a sixth detector 6 and a seventh detector 7.
Specifically, the first rolling mill 8 may be a two-high reversing mill, the second rolling mill 9 may be a four-high reversing mill, and the plurality of detectors may be hot metal detectors. Of course, the first rolling mill 8 may be a four-high reversing mill, the second rolling mill 9 may be a two-high reversing mill, and the plurality of detectors may be infrared detectors or object detectors, which is not limited in this embodiment.
Then, referring to fig. 1 and 2, the method comprises:
and S210, controlling the second plate blank to enter the first rolling mill for rolling.
In the specific implementation process, the second slab 12 firstly passes through the position below the first detector and enters the inlet of the first rolling mill 8 for rolling, and when the tail part of the second slab 12 comes out of the outlet of the first rolling mill, one-time rolling is finished.
As an alternative embodiment, the first slab 12 may be rolled one or more times in the first rolling mill. It can be rolled 3 or 5 times, so that the slab enters the second rolling mill 9 through the roller way for subsequent rolling. Of course, any odd number of rolling may be performed, and this embodiment is not limited.
In the specific implementation process, when the first slab 13 is rolled for the penultimate time in the second rolling mill 9, the second slab is controlled to enter the first rolling mill for rolling after 1-3 seconds of delay. Premature completion of the rolling of the slab can be avoided, requiring waiting for the second slab to complete. Therefore, the number of times of starting and stopping the roller way is reduced, the efficiency of a production line is optimized, and the cost is saved.
As an alternative embodiment, the second slab 8 is controlled to enter the first rolling mill for rolling while the first slab 13 is rolled for the penultimate time in the second rolling mill 9. The rolling rhythm can be improved, and the rolling gap can be shortened, so that the productivity is improved.
And S220, when the second slab runs to the position below the third detector, acquiring the distance from the tail of the first slab to the position right below the fifth detector.
In the specific implementation process, after the second slab 12 is completely rolled in the first rolling, the conveying roller table 14 controls the second slab to move to the second rolling mill 9 for subsequent rolling. When the third detector 3 detects the second slab 12 below, the distance from the tail of the first slab 13 in front to the position right below the fifth detector, namely the tail distance L of the first slab, is obtained2。
Wherein, the tail pitch L2Can be based on the rolling speed V of the second rolling mill2And time determination. Specifically, based on the formula: l is2＝L-V2X t, wherein L2Is the current tail pitch, L is the initial tail pitch, V2And t is the forward running time of the second plate blank. Of course, the distance from the tail of the first slab 13 to the position right below the fifth detector may also be determined by a distance sensor, and the embodiment is not limited.
And S230, controlling the second plate blank to run to the second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below a fifth detector.
In the implementation process, if
When the rolling speed is higher than the set speed, the second plate blank 12 is controlled to move forwards to the second rolling mill 9 to start subsequent rolling; if it is
When the second slab 12 stops moving forwards, the second slab is controlled to stand by
In the meantime, the second plate 12 blank is controlled to move forward to the second rolling mill 9 to start the subsequent rolling. Wherein, L is2Is the distance from the tail of the first slab 13 to the position right below the fifth detector 5, L1Is the distance, V, between the third detector 3 and the fourth detector 42For the rolling speed, V, of the first slab 12 in the second rolling mill 91The running speed of the roller way. Further, it is possible to have the head of the second slab 12 run under the fourth probe, the tail of the first slab 13 in front having already passed under the fifth probe. Thus, the fourth detector 4 and the fifth detector 5 can be prevented from detecting slabs at the same time, so that the system does not consider two slabs to be the same slab.
Of course, the second slab 12 can be controlled to run to the second rolling mill 9 to start the subsequent rolling based on the relationship between the distance from the tail of the first slab 13 to the position right below the fifth detector 5 and the threshold distance. If the distance is larger than the threshold distance, controlling the second plate blank 12 to stop moving forwards, and controlling the second plate blank 12 to move forwards until the second rolling mill 9 starts to perform subsequent rolling when the distance is smaller than the threshold distance; if it is greater than the threshold distance, the second slab 12 is directly controlled to move forward to the second rolling mill 9 without waiting for the start of the subsequent rolling. The present embodiment is not limited to this embodiment.
As an alternative, each slab may be rolled one or more times in the second rolling mill. The rolling can be performed 3 times or 5 times, so that the plate blank can enter the subsequent process through a roller way. Of course, any odd number of rolling may be performed, and this embodiment is not limited.
In the specific implementation process, each plate blank is rolled once in the first rolling mill 8 and five times in the second rolling mill 9 respectively; or each slab is rolled three times in the first rolling mill 8 and three times in the second rolling mill 9.
As an alternative embodiment, after the second rolling mill 9 finishes the penultimate rolling and steel throwing, the beginning deceleration head stops under the seventh detector 7 before the entrance of the second rolling mill 9, and then the last rolling is started. Wherein the time from the deceleration stop of the steel throwing of the plate blank to the beginning of the steel biting for the last rolling is 10 s.
The following description of the specific steps of rough rolling 1+5 rolling is assisted by a specific example with reference to fig. 1:
firstly, the second slab 12 is stopped below the first detector 1 at the entrance of the first rolling mill 8 through the transfer roller 14, and when the first slab 13 to be rolled in front is rolled for the fourth time in the second rolling mill 9, the second slab 12 starts to enter the first rolling mill 8 for early rolling. After the second rolling mill 9 finishes the fourth rolling and steel throwing, the first plate blank starts to decelerate, the head part stops below the seventh detector 7 in front of the inlet of the second rolling mill 9, the last rolling is started, and the first plate blank flows into the subsequent process after the last rolling is finished. Wherein the time from the deceleration stop of the steel throwing of the plate blank to the beginning of the steel biting for the last rolling is 10 s.
Next, the second slab 12 runs under the third detector after the first rolling mill 8 finishes rolling once, and the system obtains the distance L from the tail of the first slab 13 in front to the position under the fifth detector2. If it is
When the rolling speed is higher than the set speed, controlling the second plate blank 12 to move forwards until the second rolling mill 3 starts to perform subsequent rolling; if it is
When the second plate blank 12 stops moving forwards, the second plate blank 12 is controlled to stop moving forwards
In time, the second slab 12 is controlled to move forward to the second rolling mill 9 to start the subsequent rolling. Wherein, L is2Is the distance from the tail of the first slab 13 to the position right below the fifth detector 5, L1Is the distance, V, between the third detector 3 and the fourth detector 42For the rolling speed, V, of the first slab 13 in the second rolling mill 91The running speed of the roller way.
Next, the second slab 13 sequentially passes through the fourth detector 4, the fifth detector 5, the sixth detector 6 and the seventh detector 7, enters the second rolling mill 9, and starts rolling five times. Specifically, after the second plate blank is rolled and steel is thrown for the fourth time by the second rolling mill 9, the deceleration head is started to stop below the seventh detector 7 in front of the inlet of the second rolling mill 9, the last rolling is started, and the second plate blank flows into the subsequent process after the rolling is finished. Wherein the time from the deceleration stop of the steel throwing of the plate blank to the beginning of the steel biting for the last rolling is 10 s.
Example two
Based on the same inventive concept, as shown in fig. 3, the present embodiment provides a hot rolling binder control apparatus 300, including:
a first control unit 310, configured to control a second slab to enter the first rolling mill for rolling;
the obtaining unit 320 is configured to obtain a distance from the tail of the first slab to a position right below the fifth detector when the second slab moves to a position below the third detector;
and the second control unit 330 is used for controlling the second plate blank to run to the second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below the fifth detector.
Since the hot rolling wire control device described in this embodiment is a device used for implementing the hot rolling wire control method in the embodiment of the present invention, based on the hot rolling wire control method described in this embodiment of the present invention, a person skilled in the art can understand a specific implementation manner of the hot rolling wire control device of this embodiment and various modifications thereof, and therefore, a detailed description of how the hot rolling wire control device implements the method in the embodiment of the present invention is not provided here. The device adopted by the person skilled in the art to implement the hot rolling binding control method in the embodiment of the invention is within the protection scope of the invention.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the embodiment of the application provides a hot rolling wire binding control method and device, the method obtains the distance from the tail of a first plate blank to the position right below a fifth detector when the second plate blank runs to the position below the third detector, and then controls the second plate blank to run to a second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below the fifth detector. The rolling time gap between the front and the rear slabs can be reduced, and the situation that the fourth detector and the fifth detector detect the slabs simultaneously so that the system considers the front and the rear slabs to be the same slabs can be avoided. Furthermore, the fault rate of the production line is reduced. The technical problems that in the prior art, the rolling gap time of two plate blanks is large and the fault rate of a production line is high are solved, the rolling efficiency is improved, and the production cost is reduced.
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 hot rolling wire binding control method is applied to a hot rolling system, and the system comprises: the device comprises a first rolling mill, a second rolling mill, a plurality of detectors and a conveying roller way, wherein the detectors are sequentially arranged according to processes, and the method comprises the following steps:
controlling a second plate blank to enter the first rolling mill for rolling;
when the second slab runs to the position below the third detector, the distance from the tail of the first slab to the position right below the fifth detector is acquired;
and controlling the second plate blank to move to the second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below a fifth detector.
2. The method of claim 1, wherein said controlling said second slab to travel to said second rolling mill to begin subsequent rolling based on a distance of a tail of said first slab directly below a fifth detector comprises:
if it is
When the second plate blank is rolled, controlling the second plate blank to move forwards until the second rolling mill starts to perform subsequent rolling;
if it is
When the second plate blank stops moving forwards, the second plate blank is controlled to stop moving forwards
When the second plate blank is rolled, controlling the second plate blank to move forwards to the second rolling mill to start subsequent rolling;
wherein, L is2The distance from the tail part of the first slab to the position right below a fifth detector, L1Is the distance, V, between the third and fourth detectors2For the rolling speed, V, of the first slab in the second rolling mill1The running speed of the roller way.
3. The method of claim 1, wherein said controlling a second slab into said first rolling mill for rolling comprises:
and when the first plate blank is rolled for the penultimate time in the second rolling mill, delaying for 1-3 seconds to control the second plate blank to enter the first rolling mill for rolling.
4. The method of claim 1, wherein said controlling a second slab into said first rolling mill for rolling comprises:
and when the first plate blank is rolled for the penultimate time in the second rolling mill, controlling the second plate blank to enter the first rolling mill for rolling.
5. The method of claim 1, wherein said controlling said second slab to travel to said second rolling mill to begin a subsequent rolling comprises:
and after the second plate blank is rolled for the penultimate time, the last rolling is started again at an interval of 10 seconds.
6. The method of claim 1, comprising:
each plate blank is rolled once in the first rolling mill and five times in the second rolling mill respectively;
each slab is rolled in the first rolling mill three times and in the second rolling mill three times.
7. A hot rolling wire binding control device, characterized by comprising:
the first control unit is used for controlling a second plate blank to enter the first rolling mill for rolling;
the acquisition unit is used for acquiring the distance from the tail of the first slab to the position right below the fifth detector when the second slab runs to the position below the third detector;
and the second control unit is used for controlling the second plate blank to run to the second rolling mill to start subsequent rolling based on the distance from the tail of the first plate blank to the position right below the fifth detector.
8. The apparatus of claim 7, wherein the second control unit is further configured to:
if it is
When the second plate blank is rolled, controlling the second plate blank to move forwards until the second rolling mill starts to perform subsequent rolling;
if it is
When the second plate blank stops moving forwards, the second plate blank is controlled to stop moving forwards
When the second plate blank is rolled, controlling the second plate blank to move forwards to the second rolling mill to start subsequent rolling;
wherein, L is2The distance from the tail part of the first slab to the position right below a fifth detector, L1Is the distance, V, between the third and fourth detectors2For the rolling speed, V, of the first slab in the second rolling mill1The running speed of the roller way.
9. The apparatus of claim 7, wherein the first control unit is further configured to:
and when the first plate blank is rolled for the penultimate time in the second rolling mill, controlling the second plate blank to enter the first rolling mill for rolling.
10. The apparatus of claim 7, wherein the first control unit is further configured to:
and when the first plate blank is rolled for the penultimate time in the second rolling mill, delaying for 1-3 seconds to control the second plate blank to enter the first rolling mill for rolling.
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| CN202110815703.XA CN113649412A (en) | 2021-07-19 | 2021-07-19 | Hot rolling wire binding control method and device |
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| CN110586661A (en) * | 2019-08-09 | 2019-12-20 | 柳州钢铁股份有限公司 | Gapless rolling control method |
| CN111438193A (en) * | 2020-03-31 | 2020-07-24 | 首钢京唐钢铁联合有限责任公司 | Control method and control system for preventing rear-end collision during rolling of rough rolling slab |
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