CN105290116B - Method for controlling transverse rolling width and longitudinal rolling width of moderately-thick plate - Google Patents
Method for controlling transverse rolling width and longitudinal rolling width of moderately-thick plate Download PDFInfo
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- CN105290116B CN105290116B CN201510820812.5A CN201510820812A CN105290116B CN 105290116 B CN105290116 B CN 105290116B CN 201510820812 A CN201510820812 A CN 201510820812A CN 105290116 B CN105290116 B CN 105290116B
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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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
Abstract
The invention discloses a method for controlling transverse rolling width and longitudinal rolling width of a moderately-thick plate, and relates to the technical field of pressure processing of metals. The method comprises the following steps: A, setting rolling procedures, wherein the rolling reduction of all passes before the last pass in the transverse rolling stage is set according to the maximum allowable load which can be borne by a rolling machine; B, shooting a shape image of the side surface of a rolling part in front of an inlet of the last pass so as to obtain the ratio of the effective width of the middle part of the rolling part in the image to the thickness of the rolling part in the image, and synchronously measuring the actual thickness of the rolling part at the moment to obtain the width deviation; C, calculating the compensation rolling reduction of the last pass of the rolling part according to the width deviation, summing the compensation rolling reduction and the set rolling reduction of the last pass to obtain the compensated rolling reduction of the last pass, and then adjusting the roll gap value of the last pass or the last two passes according to the compensated rolling reduction, so as to obtain the expected effective width of the middle part of the finished product of the rolling part. Compared with the prior art, the method has the advantage that the width accuracy of the moderately-thick plate in the transverse rolling stage can be effectively improved.
Description
Technical field
The present invention relates to metal-pressed machine technical field, especially a kind of rolling mode rolled in transverse and longitudinal for cut deal
The control method of lower rolling width.
Background technology
In medium-thick plate production process, limited by ingot casting width, it is often necessary to produced by the way of transverse and longitudinal is rolled,
Entirely the operation of rolling will be divided into transverse rolling stage and axial rolling stage, sheet material is rolled to by desired width by transverse rolling, then by vertical
Roll and sheet material is rolled to into desired length.In the transverse rolling stage, prior art is, according to rolled piece metal volume principle of invariance, and to ignore micro-
The natural width spread of amount, it is assumed that rolled piece is always a standard rectangular body, calculates thickness when rolled piece reaches desired width, using rolling
Rolled piece is rolled to the thickness by machine, you can obtain desired width.When thicker ingot casting is rolled, due to the deformation of rolled piece upper and lower surface
Larger, mid portion deformation is less, and the side of rolled piece easily forms bending concave shape as shown in Figure 1, if therefore hypothesis rolled piece
It is always a standard rectangular body, it will bring larger calculation error, the width error for causing rolled piece exceedes the scope for allowing.
The content of the invention
It is an object of the invention to provide the width control method that a kind of cut deal transverse and longitudinal is rolled, this method can solve existing
Cut deal transverse and longitudinal is rolled and there is a problem of that width error is big.
In order to solve the above problems, the technical solution used in the present invention is：The width control system side that this cut deal transverse and longitudinal is rolled
Method, is provided with the video camera of metal detector and detection rolled piece side view before and after the milling train of transverse rolling stage extreme trace time；Using
Following steps：
A, obtain rolled piece in rolling procedure exit thickness, drafts and the phase of all preamble passages are completed in the transverse rolling stage
The width answered, and the inlet set thickness of extreme trace time, the outlet setting thickness of extreme trace time, extreme trace time inlet set width and phase
The finished product rolled piece middle part effective width of prestige, wherein, all reductions in pass before transverse rolling stage extreme trace time are according to milling train institute
The maximum allowable load that can be born is set；
B, the rolled piece when metal detector detects rolled piece into camera watch region, before the lower extreme trace time entrance of video camera shooting
Side view image, the middle part effective width of rolled piece in image and the ratio of the thickness of rolled piece in image are obtained Jing after image procossing
Value, while measuring the actual (real) thickness of now rolled piece by calibrator, according to the actual (real) thickness of the ratio and rolled piece rolled piece is calculated
The entrance middle part effective width of extreme trace time, thus can obtain the extreme trace time inlet set width of transverse rolling stage rolled piece and entering for extreme trace time
The width difference of effective width in the middle part of mouthful；
C, the compensation drafts of the extreme trace time that rolled piece is calculated according to the width difference are sued for peace with extreme trace time setting drafts
Obtain it is compensated after last reduction in pass, the gap values between rollers of extreme trace time are adjusted with this, so that rolled piece obtains desired finished product and rolls
Part middle part effective width；When the last reduction in pass after compensated has exceeded the maximum allowable load of milling train, increase by one and roll
Passage processed, by compensation after last reduction in pass be divided into two passages and rolled, then adjust the gap values between rollers of last two passage.
In the technical scheme of the width control method that above-mentioned cut deal transverse and longitudinal is rolled, more specifically technical scheme can also be：
The extreme trace time inlet set width of rolled piece is in step A：
Wherein, Wn-1For the extreme trace time inlet set width of rolled piece, unit is millimeter；W is the width of ingot casting, and L is ingot casting
Length, H is the thickness of ingot casting, and unit is millimeter；Hn-1For the inlet thickness of rolled piece extreme trace time, unit is millimeter.
Further, the calculating formula of width difference is in step B：
δn-1=Wn-1-wn-1
Wherein, δn-1For the entrance middle part effective width that the extreme trace time inlet set width of transverse rolling stage rolled piece is secondary with extreme trace
Width difference, unit is millimeter；wn-1For the entrance middle part effective width of the extreme trace time of rolled piece, unit is millimeter, and it is according under
Row formula is calculated：
In formula, hn-1For the actual (real) thickness of the rolled piece before extreme trace time entrance, unit is millimeter；For rolled piece in image
The ratio of the thickness of rolled piece in middle part effective width and image.
Further, the computational methods of the last reduction in pass after compensated in step C are as follows：
The extreme trace for assuming rolled piece sets drafts as Δ hn, unit is millimeter；Then Δ hn=Hn-1-Hn, HnFor rolled piece end
The exit thickness of passage, unit is millimeter；The compensation drafts of the extreme trace time of rolled piece is Δ h 'n, unit is millimeter；It is then compensated
Last reduction in pass afterwards is Δ Hn=Δ hn+Δh′n, unit is millimeter；Jing after mill load calculation and check, if the Jing is mended
Last reduction in pass Δ H after repayingnMore than the maximum load that milling train is allowed, then extreme trace is divided into into two passages and is rolled；
Δh′nIt is made up of two parts, a part is the width compensation drafts before last passes, if it is Δ h 'n1, unit is in the least
Rice；Another part is the width compensation drafts of last passes, if it is Δ h 'n2, unit is millimeter；
(1)Δh′n1Computational methods
Width difference δ before to eliminate last passesn-1, need to allow it is more it is high to metal extend to width,
Increase the drafts of extreme trace time, in the actual operation of rolling, have part height to metal only in the Surface runoff of rolled piece, do not formed
Effective width, needs assessment this part metals are accounted for and all have deformed the high ratio to metal, it is assumed that the ratio is Y, then the calculating of Y
Formula is：
Therefore, when considering that height has part to deform in the upper and lower surface of rolled piece to metal, then the calculating formula of drafts is compensated
For：
(2)Δh′n2Computational methods
During rolling extreme trace time, still occur part height to metal only in the phenomenon of rolled piece Surface runoff, therefore also need to
The drafts of last passes is compensated, should be in Δ hn+Δh′n1On the basis of compensate, therefore, Δ h 'n2Calculating
Formula is：
Last reduction in pass after compensated is：
The present invention principle be：The maximum allowable load that the reduction in pass of preamble can bear according to milling train is set
It is fixed, by the control accuracy for adjusting the drafts of transverse rolling stage extreme trace time to improve width.One work is respectively installed before and after milling train
Industry ccd video camera, ensureing each video camera by adjusting the distance of video camera and roller-way can be while photographs rolled piece
Head and Tail Shape.Before the last a time of rolling, by the side view of industrial CCD camera acquisition rolled piece, and then rolled piece is obtained
The actual entry width of extreme trace time, and it is compared with exit width is calculated, according to pressure of its deviation to last a time
Lower amount and exit thickness are modified, and such as revised drafts then increases by one and roll beyond the maximum allowable load of milling train
Passage processed.
As a result of above-mentioned technical proposal, the present invention has the advantages that compared with prior art：The present invention is adopted
The leading flank shape of rolling of extreme trace time is detected with video camera, and according to actual side view amendment transverse rolling stage Mo together
Secondary exit thickness and drafts, to avoid assuming that rolled piece is the calculation error that a standard rectangular body brings, can effectively improve
The width accuracy in cut deal transverse rolling stage.
Description of the drawings
Fig. 1 is the transverse rolling stage rolled piece side view schematic diagram that industrial CCD video camera shoots.
Fig. 2 is the schematic view of the mounting position of industrial CCD video camera and metal detector.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described for embodiment：
As shown in Fig. 2 the present invention respectively installs an industrial CCD video camera 3 and metal detector 4 before and after milling train 1, pass through
The distance of adjustment video camera and roller-way come ensure each video camera can be while photographing rolled piece 5 on roller-way 2 end to end
Shape.
The present invention consider on the basis of existing technology, be first according to prior art setting the transverse rolling stage exit thickness and
Every time drafts, the maximum allowable load that the reduction in pass of preamble can bear according to milling train carries out being set by adjusting
Save the drafts of last passage to control width.Assume that rolled piece is always a standard rectangular body, according to rolled piece metal volume
Invariance principle can obtain completing exit thickness, drafts and the corresponding width of all preamble passages.Respectively install before and after milling train
One industrial CCD video camera, by adjust video camera with the distance of roller-way come ensure each video camera can be while shooting
To the Head and Tail Shape of rolled piece.Before the last a time of rolling, the side view of rolled piece is gathered by industrial camera, and then rolled
The actual entry width of part extreme trace time, and it is compared with the extreme trace time inlet set width of rolled piece, according to its deviation
The drafts of last a time is modified, such as revised drafts then increases by one beyond the maximum allowable load of milling train
Individual rolling pass.
The width control method that this cut deal transverse and longitudinal is rolled specifically adopts following steps：
A, by milling train the second-level model default transverse rolling stage rolling procedure, in rolling procedure obtain rolled piece in horizontal stroke
The stage of rolling completes exit thickness, drafts and the corresponding width of all preamble passages, and extreme trace time inlet set thickness,
The outlet of extreme trace time sets thickness, extreme trace time inlet set width and desired finished product rolled piece middle part effective width, wherein, transverse rolling
The maximum allowable load that all reductions in pass before stage extreme trace time can bear according to milling train is set；It is now false
If rolled piece is always a standard rectangular body, can be obtained completing the outlet of all preamble passages according to rolled piece metal volume invariance principle
Thickness, drafts and corresponding width；If the length of ingot casting is L, width is W, and thickness is H, and unit is millimeter；By rolling procedure
Can obtain, total road number of times in transverse rolling stage is n；The inlet set thickness of extreme trace time is Hn-1, unit is millimeter；The outlet of extreme trace time
Thickness is set as Hn, unit is millimeter；Desired finished product rolled piece middle part effective width is Wn, unit is millimeter.Assume the length of rolled piece
L is constant for degree, then the extreme trace of rolled piece time inlet set width Wn-1(unit is millimeter) is：
B, rolled piece is successively detected away from the rising edge signal of milling train one end part and near milling train one when metal detector
During the trailing edge of end part, illustrate that rolled piece enters camera watch region, now being shown to PLC system sending signal from metal detector can
To be imaged, industrial CCD video camera shoots the image of the side view of the rolled piece before the extreme trace time entrance in transverse rolling stage, and leads to
Cross high speed Image Data Acquisition Card and will send into computer after image digitazation, as the object of workpiece measurement identification, by computer
The shape image of rolled piece is carried out geometric distortion correction, noise filtering, rim detection, locations of contours, sub-pixel method edge positioning,
The step such as planar dimension measurement and calculating, similar rolled piece side view as shown in Figure 1 can be obtained Jing after processing；W ' in Fig. 1n-1
For the middle part effective width of rolled piece in image, h 'n-1For the thickness of rolled piece in image, unit is millimeter, h 'n-1、w′n-1Value
Can be obtained by the tape measure in image, can not be full size, because follow-up calculating only needs the ratio between three to close
System；It is h that the actual (real) thickness for assuming now rolled piece is the actual (real) thickness of the rolled piece before extreme trace time entrancen-1, unit is millimeter, the value
Can be obtained with chi measurement by calibrator or operator；The entrance middle part effective width of the extreme trace time of rolled piece is wn-1, unit is in the least
Rice.Therefore, it is known that entrance middle part effective width w of the extreme trace time of rolled piecen-1Calculating formula be：
Thus the extreme trace time inlet set width of transverse rolling stage rolled piece and the entrance middle part effective width of extreme trace time is obtained
Width difference δn-1(unit is millimeter) is：
δn-1=Wn-1-wn-1
Due to Wn-1Calculate under conditions of hypothesis rolled piece is always a standard rectangular body, and wn-1It is actually to roll
During system rolled piece exist upper and lower surface and middle part deformation it is uneven in the case of detect and calculate, therefore Wn-1＞
wn-1, therefore, δn-1Be always on the occasion of.
C, calculated according to the width difference rolled piece extreme trace time compensation drafts, with extreme trace time setting drafts summation
Obtain it is compensated after last reduction in pass, it is compensated after last reduction in pass computational methods it is as follows：
The extreme trace for assuming rolled piece sets drafts as Δ hn, unit is millimeter；Then Δ hn=Hn-1-Hn；The extreme trace of rolled piece
Secondary compensation drafts is Δ h 'n, unit is millimeter；Last reduction in pass after then compensated is Δ Hn=Δ hn+Δh′n, it is single
Position is millimeter；Jing after mill load calculation and check, if the drafts Δ H after the compensationnMore than the maximum load that milling train is allowed,
Then increase a rolling pass, extreme trace is divided into into two passages and is rolled；Because of the extreme trace time setting drafts Δ h of rolled piecen
Can find in the rolling procedure of second-level model system, below to Δ h 'nIt is analyzed calculating.Δh′nIt is made up of two parts, one
Part is the width compensation drafts before last passes, if it is Δ h 'n1, unit is millimeter；Another part is extreme trace
The width compensation drafts of rolling, if it is Δ h 'n2, unit is millimeter；
(1)Δh′n1Computational methods
Width difference δ before to eliminate last passesn-1, need to allow it is more it is high to metal extend to width,
If therefore not considering deformation of the metal in rolled piece upper and lower surface, i.e., all of height has all flow to the width side of rolled piece to metal
To the calculating formula for then needing compensation drafts is：
But in the actual operation of rolling, there is part height to metal only in the Surface runoff of rolled piece, and be formed without imitating width, need
Assess this part metals and account for and all deformed the high ratio to metal, it is assumed that the ratio is Y, then the calculating formula of Y is：
Therefore, when considering that height has part to deform in the upper and lower surface of rolled piece to metal, then the calculating formula of drafts is compensated
For：
(2)Δh′n2Computational methods
During rolling extreme trace time, still occur part height to metal only in the phenomenon of rolled piece Surface runoff, therefore also need to
The drafts of last passes is compensated.Should be in Δ hn+Δh′n1On the basis of compensate, therefore, Δ h 'n2Calculating
Formula is：
Last reduction in pass after compensated is：
If the value has exceeded the maximum allowable load of milling train, will be compensated after last reduction in pass Δ HnIt is divided into two
Individual passage is rolled, and can be distributed in any proportion, as long as the load of milling train is less than maximum permissible value.
When the extreme trace after compensation time or last two passage is calculated, (a time rolling load is transfinited, and is divided to two passes
When) after drafts, the extreme trace time gap values between rollers that should be put in advance by second-level model default milling train or last two passages gap values between rollers, and
Send to PLC system and performed.When rolled piece is rolled by this roll gap, it is ensured that the middle part effective width of finished product rolled piece can
To reach expected value Wn。
If the length L=3000 millimeter of ingot casting, width W=2000 millimeters, thickness H=500 millimeters；Can by rolling procedure
, total road number of times in transverse rolling stage is 4；The inlet thickness H of rolled piece extreme trace timen-1=455 millimeters；The outlet of rolled piece extreme trace time is thick
Degree Hn=445 millimeters.Desired rolled piece middle part effective width Wn=2247.2 millimeters.Assume that the length of transverse rolling passage rolled piece is constant,
The then extreme trace time inlet set width W of rolled piecen-1(unit is millimeter) is：
The middle part effective width w ' of rolled piece in image is obtained by the tape measure in imagen-1=382 millimeters, in image
The thickness h ' of rolled piecen-1=80 millimeters.Rolled piece before now extreme trace time entrance is obtained with chi measurement by calibrator or operator
Actual (real) thickness hn-1=457 millimeters；Then entrance middle part effective width w of the extreme trace time of rolled piecen-1For：
Thus the extreme trace time inlet set width of transverse rolling stage rolled piece and the entrance middle part effective width of extreme trace time is obtained
Width difference δn-1For：
δn-1=Wn-1-wn-1=2197.8-2182.18=15.62 millimeters
If the extreme trace of rolled piece sets drafts as Δ hn=Hn-1-Hn=10 millimeters；Then Y value is：
The width compensation drafts before last passes is obtained is：
The width compensation drafts Δ h ' of last passesn2For：
Δh′n2=(Δ hn+Δh′n1) Y=(10+3.35) × 0.0319=0.43 millimeters
Last reduction in pass after compensated is：
ΔHn=Δ hn+Δh′n1+Δh′n2=10+3.35+0.43=13.78 millimeters
When the drafts of extreme trace time is Δ HnWhen=13.78 millimeters, the middle part effective width of finished product rolled piece can reach the phase
Prestige value Wn=2247.2 millimeters.If the value has exceeded the maximum allowable load of milling train, by drafts Δ HnIt is divided into two passages
Rolled.
Claims (4)
1. the width control method that a kind of cut deal transverse and longitudinal is rolled, it is characterised in that：Set before and after the milling train of transverse rolling stage extreme trace time
It is equipped with the video camera of metal detector and detection rolled piece side view；Using following steps：
A, obtain in rolling procedure rolled piece and complete the exit thickness of all preamble passages, drafts and corresponding in the transverse rolling stage
Width, and the inlet set thickness of extreme trace time, the outlet setting thickness of extreme trace time, extreme trace time inlet set width and desired
Finished product rolled piece middle part effective width, wherein, all reductions in pass before transverse rolling stage extreme trace time to be held according to milling train
The maximum allowable load received is set；
B, the rolled piece side when metal detector detects rolled piece into camera watch region, before the lower extreme trace time entrance of video camera shooting
Shape image, the middle part effective width of rolled piece in image and the ratio of the thickness of rolled piece in image is obtained Jing after image procossing, together
When by calibrator measurement now rolled piece actual (real) thickness, rolled piece extreme trace is calculated according to the actual (real) thickness of the ratio and rolled piece
Entrance middle part effective width, thus can obtain the extreme trace time inlet set width of transverse rolling stage rolled piece and the entrance middle part of extreme trace time
The width difference of effective width；
C, the compensation drafts of the extreme trace time that rolled piece is calculated according to the width difference are sued for peace with extreme trace time setting drafts and are obtained
Last reduction in pass after compensated, with this gap values between rollers of extreme trace time are adjusted, so that rolled piece is obtained in desired finished product rolled piece
Portion's effective width；When the last reduction in pass after compensated has exceeded the maximum allowable load of milling train, increase a rolling road
It is secondary, by compensation after last reduction in pass be divided into two passages and rolled, then adjust the gap values between rollers of last two passage.
2. the width control method that cut deal transverse and longitudinal according to claim 1 is rolled, it is characterised in that：Rolled piece in step A
Extreme trace time inlet set width is：
Wherein, Wn-1For the extreme trace time inlet set width of rolled piece, unit is millimeter；W is the width of ingot casting, and L is the length of ingot casting
Degree, H is the thickness of ingot casting, and unit is millimeter；Hn-1For the inlet thickness of rolled piece extreme trace time, unit is millimeter.
3. the width control method that cut deal transverse and longitudinal according to claim 2 is rolled, it is characterised in that：Width is inclined in step B
Poor calculating formula is：
δn-1=Wn-1-wn-1
Wherein, δn-1For the width of the extreme trace time inlet set width of the transverse rolling stage rolled piece entrance middle part effective width secondary with extreme trace
Degree deviation, unit is millimeter；wn-1For the entrance middle part effective width of the extreme trace time of rolled piece, unit is millimeter, and it is according to following public affairs
Formula is calculated：
In formula, hn-1For the actual (real) thickness of the rolled piece before extreme trace time entrance, unit is millimeter；For the middle part of rolled piece in image
The ratio of the thickness of rolled piece in effective width and image.
4. the width control method that cut deal transverse and longitudinal according to claim 3 is rolled, it is characterised in that：It is compensated in step C
The computational methods of last reduction in pass afterwards are as follows：
The extreme trace for assuming rolled piece sets drafts as Δ hn, unit is millimeter；Then Δ hn=Hn-1-Hn, HnFor rolled piece extreme trace time
Exit thickness, unit is millimeter；The compensation drafts of the extreme trace time of rolled piece is Δ h 'n, unit is millimeter；End after then compensated
Reduction in pass is Δ Hn=Δ hn+Δh′n, unit is millimeter；Jing after mill load calculation and check, if after this is compensated
Last reduction in pass Δ HnMore than the maximum load that milling train is allowed, then extreme trace is divided into into two passages and is rolled；Δh′nBy
Two parts are constituted, and a part is the width compensation drafts before last passes, if it is Δ h 'n1, unit is millimeter；It is another
Part is the width compensation drafts of last passes, if it is Δ h 'n2, unit is millimeter；
(1)Δh′n1Computational methods
Width difference δ before to eliminate last passesn-1, need to allow it is more it is high to metal extend to width, that is, increase
Plus the drafts of extreme trace time, in the actual operation of rolling, there is part height to metal only in the Surface runoff of rolled piece, and it is formed without effect
Width, needs assessment this part metals are accounted for and all have deformed the high ratio to metal, it is assumed that the ratio is Y, then the calculating formula of Y
For：
Therefore, when considering that height has part to deform in the upper and lower surface of rolled piece to metal, then the calculating formula for compensating drafts is：
(2)Δh′n2Computational methods
During rolling extreme trace time, still occur part height to metal only in the phenomenon of rolled piece Surface runoff, therefore also need to end
The drafts of passes is compensated, should be in Δ hn+Δh′n1On the basis of compensate, therefore, Δ h 'n2Calculating formula be：
Last reduction in pass after compensated is：
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| JP6607318B2 (en) * | 2016-07-26 | 2019-11-20 | 東芝三菱電機産業システム株式会社 | Edger control device |
| CN110516312B (en) * | 2019-07-31 | 2022-10-21 | 北京首钢自动化信息技术有限公司 | Method for distributing plate shape locking rules of end stage of bending-roller-free medium plate |
| CN112974543B (en) * | 2019-12-12 | 2022-09-09 | 上海梅山钢铁股份有限公司 | Method for optimizing ship-shaped curve of hot-rolled thin strip steel |
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| JPH01233005A (en) * | 1988-03-14 | 1989-09-18 | Sumitomo Metal Ind Ltd | Method for controlling plate width in hot rolling of thin cast billet |
| JPH07214126A (en) * | 1994-01-27 | 1995-08-15 | Nippon Steel Corp | Method for rolling thick steel plate |
| CN1850373A (en) * | 2006-04-29 | 2006-10-25 | 东北大学 | Method for rolling variable-width steel plate |
| CN102886381B (en) * | 2011-07-22 | 2014-08-20 | 宝山钢铁股份有限公司 | Thick plate rolling method |
| CN103752622B (en) * | 2013-12-23 | 2016-08-24 | 宝山钢铁股份有限公司 | A kind of heavy plate rolling control method eliminating strand edge fault |
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