CN103302110B - Feedforward control method for laminar flow cooling edge part shielding device of wide and thick plate - Google Patents
Feedforward control method for laminar flow cooling edge part shielding device of wide and thick plate Download PDFInfo
- Publication number
- CN103302110B CN103302110B CN201310247909.2A CN201310247909A CN103302110B CN 103302110 B CN103302110 B CN 103302110B CN 201310247909 A CN201310247909 A CN 201310247909A CN 103302110 B CN103302110 B CN 103302110B
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- China
- Prior art keywords
- edge part
- steel plate
- roller
- center line
- part shading
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Abstract
The invention provides a feedforward control method for a laminar flow cooling edge part shielding device of a wide and thick plate. The method comprises the steps of establishing a cartesian coordinate system, determining a roller way center line and a steel plate center line of a steel plate transportation roller way, collecting a scanning type pyrometer image of the steel plate on a transportation line, computing distances between a driving side edge part of the steel plate and the roller way center line, and between a non-driving edge part of the steel plate and the roller way center line through the image, determining an offset of the steel plate center line relative to the roller way center line, determining an edge part shielding feedforward correction according to the offset, acquiring the pre-shielding quantity of the steel plate according to the edge part shielding feedforward correction and through an edge part shielding model, determining displacement distances of a driving side and a non-driving side of the edge part shielding device, and accomplishing shielding control according to the displacement distances before the steel plate arrives at a controlled cooling system. The method can timely adjust the edge part shielding quantity of the steel plate, guarantees the uniformity of temperature in a width direction of the steel plate, and solves the problem that the edge part shielding quantity of the two sides of the steel plate is not consistent in a cooling process.
Description
Technical field
The invention belongs to Steel Rolling Control technology, specifically a kind of feed forward control method of Wide and Thick Slab section cooling edge part shading device.
Background technology
In the production process of Wide and Thick Slab, after steel plate goes out finishing mill, enter water-cooled region and cool fast, obtain destination organization and performance steel plate; And cooling uniformity controls in cooling procedure very important.
And steel plate is in the operation of rolling or be transported to the process of water cooling plant from finishing mill, often there is the problem of center not on the center line of conveyor roller of steel plate, cause steel plate amesiality on water cooling roller channel, and the left and right sides, edge part shading position of model precomputation is consistent, thus make steel plate both sides masking amount not, so that reduce edge part shading effect, cause steel plate width direction temperature uneven, and then affect product quality.
At present, ensure that the uniformity of temperature on steel plate width direction is a kind of conventional type of cooling by edge part shading device, but the control method of existing edge part shading device mainly controls according to model preset value, do not consider steel plate rolling process and roll in rear transportation, there will be the problem of position of center line not on the center line of conveyor roller of steel plate, edge part shading feedforward control can not be carried out in basis steel sheet position, thus the edge part shading amount of steel plate can not be adjusted in time.This is the deficiencies in the prior art part.
Summary of the invention
The technical problem to be solved in the present invention is, for the deficiencies in the prior art part, there is provided one can solve because plate centre line does not overlap with conveyor roller center line, cause steel plate both sides edge masking amount in cooling procedure inconsistent, thus causing the feed forward control method of the Wide and Thick Slab section cooling edge part shading device of the uneven problem of temperature on steel plate width direction, the technical program can be carried out presetting edge part shading amount and be done adjustment in time before steel plate enters water-cooling system prerequisite.
In order to solve the problems of the technologies described above, the invention provides the feed forward control method of following a kind of Wide and Thick Slab section cooling edge part shading device, comprising step:
(1) set up cartesian coordinate system, determine roller-way center line and the plate centre line of steel plate transport roller-way;
(2) gathered the pyrometer image of transport roller diatom upper steel plate by scan-type pyrometer, and pass through the distance x that gathered pyrometer image calculates steel plate driving side edge distance roller-way center line
1with the distance x of steel plate non-drive side edge distance roller-way center line
2, determine the offset Δ x of plate centre line relative to roller-way center line simultaneously, and Δ x=(x
1-x
2)/2;
(3) according to described offset Δ x, determine edge part shading feedforward correction, make steel plate driving side edge part shading amount E
dSwith steel plate non-drive side edge part shading amount E
nDSequal;
(4) according to described edge part shading feedforward correction with by the pre-masking amount of steel plate that edge part shading model obtains, the displacement of edge part shading device driving side and the displacement of non-drive side thereof is determined;
(5) according to described each displacement, before steel plate arrives Controlled cooling system, corresponding adjustment is carried out to masking device, completes and cover control.
Wherein, the cartesian coordinate system described in step (1) with the width place straight line of conveyor roller be x-axis, with the direction of advance place straight line of steel plate for y-axis.
Wherein, the scan-type pyrometer described in step (2) is arranged on directly over conveyor roller center line.
Wherein, the edge part shading feedforward correction described in step (3) is the offset Δ x of plate centre line relative to roller-way center line; And during Δ x=0, plate centre line overlaps with roller-way center line, the value of edge part shading feedforward correction is 0; Δ x>0, i.e. x
1>x
2time, plate centre line is in roller-way center line side, and the value of edge part shading feedforward correction is | Δ x|=(x
1-x
2)/2; Δ x<0, i.e. x
1<x
2time, plate centre line is at the opposite side of roller-way center line, and the value of edge part shading feedforward correction is | Δ x|=-(x
1-x
2)/2.
Wherein, the displacement of the edge part shading device driving side described in step (4) is
L＝x
PDS-(w
plate/2-x
Prc)-Δx，
The displacement of described edge part shading device non-drive side is
L＝x
PNDS-(w
plate/2-x
Prc)+Δx,
Wherein, x
pDSfor the initial distance to roller-way center line inside driving side edge part shading device, x
pNDSfor the initial distance to roller-way center line inside non-drive side edge part shading device, w
platefor steel plate width, x
prcfor the pre-masking amount of steel plate, Δ x is edge part shading feedforward correction.
Wherein, described cartesian coordinate system with conveyor roller center line be y-axis, with the direction of advance of steel plate for y-axis positive direction.
Compared with prior art, the invention has the advantages that:
The present invention can regulate the masking amount of edge masking device automatically, overcome steel plate rolling process and roll rear transportation light plate center line and depart from the center line of conveyor roller, but can not carry out the drawback of edge part shading feedforward control according to detection steel plate position, can be followed up adjustment edge part shading amount in time, ensure that the uniformity of steel plate both sides masking amount in cooling procedure, practical.
As can be seen here, compared with prior art, have outstanding substantive distinguishing features and significant progress, its beneficial effect implemented also is apparent in the present invention.
Accompanying drawing explanation
In order to be illustrated more clearly in embodiments of the present invention, be briefly described to the accompanying drawing used required in embodiment below.
Fig. 1 is flow chart of the present invention.
Fig. 2 is a kind of embodiment of cartesian coordinate system of the present invention.
Fig. 3 is a kind of view of steel plate in cartesian coordinate system shown in Fig. 2.
Fig. 4 is a kind of embodiment of the present invention under cartesian coordinate system shown in Fig. 2.
Wherein: 1 is steel plate, 2 is conveyor roller, and 3 is scan-type pyrometer, CL
rollfor roller-way center line, CL
platefor plate centre line, Δ x is the side-play amount of plate centre line relative to roller-way center line, x
1for the distance of steel plate driving side edge distance roller-way center line, x
2for the distance of steel plate non-drive side edge distance roller-way center line, x
3for scan-type pyrometer non-drive side measurement category edge is apart from the distance of roller-way center line, x
4for the measurement category of scan-type pyrometer, x
pNDSfor the initial distance to roller-way center line inside non-drive side edge part shading device, x
pDSfor the initial distance to roller-way center line inside driving side edge part shading device, x
wNDSfor revising the distance to roller-way center line inside rear non-drive side edge part shading device, x
wDSfor revising the distance to roller-way center line inside rear drive side portion masking device.
Detailed description of the invention
For ease of illustrating, below in conjunction with accompanying drawing, invention is described in further detail.
As shown in Figure 1, the feed forward control method of a kind of Wide and Thick Slab section cooling edge part shading device of the present invention, comprises step:
(1) set up cartesian coordinate system, determine the roller-way centre line C L of the conveyor roller 2 of steel plate 1
rollwith the plate centre line CL of steel plate 1
plate;
(2) gathered the pyrometer image of transport roller diatom upper steel plate by scan-type pyrometer 3, and pass through gathered pyrometer image calculating steel plate 1 driving side edge distance roller-way centre line C L
rolldistance x
1with steel plate 1 non-drive side edge distance roller-way centre line C L
rolldistance x
2, determine plate centre line CL simultaneously
platerelative to roller-way centre line C L
rolloffset Δ x, and Δ x=(x
1-x
2)/2;
(3) according to described offset Δ x, determine edge part shading feedforward correction, make steel plate 1 driving side edge part shading amount E
dSwith steel plate 1 non-drive side edge part shading amount E
nDSequal;
(4) according to described edge part shading feedforward correction with by the pre-masking amount of steel plate that edge part shading model obtains, the displacement of edge part shading device driving side and the displacement of non-drive side thereof is determined;
(5) according to described each displacement, before steel plate 1 arrives Controlled cooling system, corresponding adjustment is carried out to masking device, completes and cover control.
Wherein, as shown in Figure 2, with roller-way centre line C L
rollfor y-axis, with the direction of advance place straight line of steel plate 1 for y-axis sets up cartesian coordinate system.Particularly, described cartesian coordinate system is with conveyor roller centre line C L
rollfor y-axis, with the direction of advance of steel plate 1 for y-axis positive direction, and in this cartesian coordinate system, determine the roller-way centre line C L of steel plate 1 conveyor roller 2
rollwith plate centre line CL
plate, wherein roller-way centre line C L
rolloverlap with y-axis.
Wherein, as shown in Figure 3, scan-type pyrometer 3 is arranged on conveyor roller centre line C L
rolldirectly over.X
4for the measurement category of scan-type pyrometer 3, x
3for scan-type pyrometer 3 non-drive side measurement category edge is apart from roller-way centre line C L
rolldistance, x
3=x
4/ 2; x
1for the distance of steel plate 1 driving side edge distance y-axis, x
2for the distance of steel plate 1 non-drive side edge distance y-axis, and the width of steel plate 1 is made to be w
plate, then x
1+ x
2=w
plate; Plate centre line CL
platerelative to roller-way centre line C L
rolloffset Δ x=(the x of (y-axis)
1-x
2)/2.
Wherein, described edge part shading feedforward correction is plate centre line CL
platerelative to roller-way centre line C L
rolloffset Δ x, thus have edge part shading feedover correction be Δ x=(x
1-x
2)/2; And if Δ x=0, then plate centre line CL
platewith roller-way centre line C L
rollcoincidence, edge part shading feedforward correction value be 0; If offset Δ x>0, as shown in Figure 3, x
1>x
2, then steel plate 1 moves along x-axis positive direction, and plate centre line CL
platein roller-way centre line C L
rollright side, edge part shading feedforward correction value be | Δ x|=(x
1-x
2)/2; If Δ x<0, i.e. x
1<x
2, then steel plate 1 moves along x-axis negative sense, plate centre line CL
platein roller-way centre line C L
rollleft side, and edge part shading feedforward correction value be | Δ x|=-(x
1-x
2)/2.
Wherein, as shown in Figure 4, x
wDSfor revising inside rear drive side portion masking device to roller-way centre line C L
rolldistance, x
wNDSfor revising inside rear non-drive side edge part shading device to roller-way centre line C L
rolldistance, x
pDSfor arriving roller-way centre line C L inside driving side edge part shading device
rollinitial distance, x
pNDSfor arriving roller-way centre line C L inside non-drive side edge part shading device
rollinitial distance, w
platefor steel plate 1 width, x
prcfor the pre-masking amount of steel plate, Δ x is edge part shading feedforward correction, then
x
WDS＝(w
plate/2-x
Prc)+Δx；
x
WNDS＝(w
plate/2-x
Prc)-Δx；
Can obtain further, the displacement of edge part shading device driving side is
L＝x
PDS-x
WDS＝x
PDS-(w
plate/2-x
Prc)-Δx，
The displacement of edge part shading device non-drive side is
L＝x
PNDS-x
WNDS＝x
PNDS-(w
plate/2-x
Prc)+Δx。
Such as, by w
plate=3905mm, x
1=1958.75mm, x
2=1946.25mm, x
pDS=x
pNDS=2200mm, then have:
The pre-masking amount x of steel plate
prc=46.15mm,
Edge part shading feedforward correction is Δ x=(x
1-x
2)/2=6.25mm,
Revise inside rear drive side portion masking device to roller-way centre line C L
rolldistance be
x
WDS＝(w
plate/2-x
Prc)+Δx＝1912.6mm，
Roller-way centre line C L is arrived inside non-drive side edge part shading device after revising
rolldistance be
x
WNDS＝(w
plate/2-x
Prc)-Δx＝1900.1mm；
Thus, edge part shading device driving side displacement L
dS=x
pDS-x
wDS=287.4mm;
Edge part shading device non-drive side operating position L
nDS=x
pNDS-x
wNDS=299.9mm.
According to the edge part shading device driving side displacement L of gained
dSwith edge part shading device non-drive side displacement L
nDS, before steel plate 1 enters water-cooling system, by executing agency, edge masking device is adjusted, completes the adjustment of masking device feedforward control.
Technical solutions according to the invention, make the temperature homogeneity on steel plate 1 width good, and on width, the temperature difference control within 25 DEG C.
To sum up, the invention solves the steel plate problem that both sides masking amount is inconsistent in cooling procedure that center line departs from conveyor roller, feedforward control is carried out before steel plate enters water-cooling system, carry out presetting edge part shading amount in advance and adjustment in time, improve the uniformity of steel plate transverse temperature, ensure that the quality of product, practical.
Claims (6)
1. a feed forward control method for Wide and Thick Slab section cooling edge part shading device, is characterized in that comprising the following steps:
(1) set up cartesian coordinate system, determine roller-way center line and the plate centre line of steel plate transport roller-way;
(2) gathered the pyrometer image of transport roller diatom upper steel plate by scan-type pyrometer, and pass through the distance x that gathered pyrometer image calculates steel plate driving side edge distance roller-way center line
1with the distance x of steel plate non-drive side edge distance roller-way center line
2, determine the offset Δ x of plate centre line relative to roller-way center line simultaneously, and Δ x=(x
1-x
2)/2;
(3) according to described offset Δ x, determine edge part shading feedforward correction, make steel plate driving side edge part shading amount E
dSwith steel plate non-drive side edge part shading amount E
nDSequal;
(4) according to described edge part shading feedforward correction with by the pre-masking amount of steel plate that edge part shading model obtains, the displacement of edge part shading device driving side and the displacement of non-drive side thereof is determined;
(5) according to described each displacement, before steel plate arrives Controlled cooling system, corresponding adjustment is carried out to masking device, completes and cover control.
2. the feed forward control method of Wide and Thick Slab section cooling edge part shading device according to claim 1, is characterized in that: the cartesian coordinate system described in step (1) with the width place straight line of conveyor roller be x-axis, with the direction of advance place straight line of steel plate for y-axis.
3. the feed forward control method of Wide and Thick Slab section cooling edge part shading device according to claim 1, is characterized in that: the scan-type pyrometer described in step (2) is arranged on directly over conveyor roller center line.
4. the feed forward control method of Wide and Thick Slab section cooling edge part shading device according to claim 1, is characterized in that: the edge part shading feedforward correction described in step (3) is the offset Δ x of plate centre line relative to roller-way center line; And during Δ x=0, plate centre line overlaps with roller-way center line, the value of edge part shading feedforward correction is 0; Δ x>0, i.e. x
1>x
2time, plate centre line is in roller-way center line side, and the value of edge part shading feedforward correction is | Δ x|=(x
1-x
2)/2; Δ x<0, i.e. x
1<x
2time, plate centre line is at the opposite side of roller-way center line, and the value of edge part shading feedforward correction is | Δ x|=-(x
1-x
2)/2.
5. the feed forward control method of Wide and Thick Slab section cooling edge part shading device according to claim 1, is characterized in that: the displacement of the edge part shading device driving side described in step (4) is
The displacement of described edge part shading device non-drive side is
Wherein, x
pDSfor the initial distance to roller-way center line inside driving side edge part shading device, x
pNDSfor the initial distance to roller-way center line inside non-drive side edge part shading device, w
platefor steel plate width, x
prcfor the pre-masking amount of steel plate, Δ x is edge part shading feedforward correction.
6. the feed forward control method of Wide and Thick Slab section cooling edge part shading device according to claim 2, is characterized in that: described cartesian coordinate system with conveyor roller center line be y-axis, with the direction of advance of steel plate for y-axis positive direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247909.2A CN103302110B (en) | 2013-06-20 | 2013-06-20 | Feedforward control method for laminar flow cooling edge part shielding device of wide and thick plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247909.2A CN103302110B (en) | 2013-06-20 | 2013-06-20 | Feedforward control method for laminar flow cooling edge part shielding device of wide and thick plate |
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| CN103302110A CN103302110A (en) | 2013-09-18 |
| CN103302110B true CN103302110B (en) | 2015-06-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104438356B (en) * | 2014-09-23 | 2017-04-05 | 北京首钢股份有限公司 | A kind of method for improving Thin container plate edge shape wave |
| CN111420999B (en) * | 2019-01-10 | 2021-06-15 | 宝山钢铁股份有限公司 | Method for controlling temperature difference between upper surface and lower surface of finish rolling intermediate billet |
| CN111420998B (en) * | 2019-01-10 | 2021-06-15 | 宝山钢铁股份有限公司 | Method for uniformly heating width of precision rolling intermediate billet in length direction at temperature |
| CN114713639A (en) * | 2022-03-25 | 2022-07-08 | 北京科技大学设计研究院有限公司 | Shielding device control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5992111A (en) * | 1982-11-19 | 1984-05-28 | Kawasaki Steel Corp | Controlling method for cooling thick steel plate |
| CN101502849B (en) * | 2009-03-19 | 2011-12-21 | 东北大学 | Medium plate laminar cooling chain edge part shading device control method |
| CN102397891A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Equivalent laminar cooling method |
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2013
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