CN1478615A - Medium thickness plate shape warping on line control device and method - Google Patents
Medium thickness plate shape warping on line control device and method Download PDFInfo
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- CN1478615A CN1478615A CNA031145841A CN03114584A CN1478615A CN 1478615 A CN1478615 A CN 1478615A CN A031145841 A CNA031145841 A CN A031145841A CN 03114584 A CN03114584 A CN 03114584A CN 1478615 A CN1478615 A CN 1478615A
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Abstract
An in-line control equipment and method for preventing the curling of middle-thickness plate features that a geometric shape coefficient of deforming area, which has important influence to rolling stress and strain state is introduced for regulating the guide unit in vertical direction, that is, a vertically continuously regulatable dynamic guide unit is used. Its advantages are high effect and low cost.
Description
One, technical field
The present invention relates to a kind of device and method of Metal Forming process, the On-line Control device and method of plate shape warpage in particularly a kind of Medium and Heavy Plate Rolling process.
Two, background technology
Thick above cut deal of rolling 4mm or operation of rolling sheet metal thickness are when this zone, and its characteristics are single chassis normally, and rolled piece is nipped often, do not have to apply front and back tension force.A kind of common flatness defect is a warpage in the production, and promptly rolled piece descends to bend or upwarps after going out roll gap, and this is a ubiquitous difficult problem in the Heavy Plate Production.Plate shape warpage causes a large amount of waste products and defective products, even causes the production fault, and the meeting damage equipment has increased stop production to overhaul time and maintenance cost when serious, and economic loss is very big.
In the metal processing industry, plate shape warpage issues does not exist only in enormous quantities, and the iron and steel of few kind is a small lot in products characteristics especially in producing, many kinds, and non-ferrous metal production that complex process is changeable and bar milk are particularly outstanding in producing.Solving on the cut deal plate shape warpage issues, the technical measures that relevant document and production scene propose have, by test the difference of upper and lower side roller footpath, roller temperature, roller speed, rolled piece temperature, lubricating status is set, and limits reduction in pass etc., promptly with multifactor Comprehensive Control.The drawback that these technical methods exist is that multifactor enforcement is complicated, in the also difficult realization of some enterprises; Can not predict the direction of rolled piece warpage with process system, curved in order to prevent down, artificially limit reduction in pass, can not bring into play equipment potential; Plate shape warpage issues still puzzlement is often produced.
In relevant document, introduced and adopted horizontal hydraulic pressure roller control panel shape warpage on the novel rolling mill of external development, but numerous online milling train can short-term not update, and equipment investment is very big.
Three, summary of the invention
The objective of the invention is to overcome the deficiency of art methods, provide a kind of inlet guide (or roller-way) can regulate the On-line Control device of its height arbitrarily, thereby control cut deal produces plate shape warpage in the operation of rolling defective in the operation of rolling; Another object of the present invention is: a kind of method of using this device to cut deal plate shape warpage On-line Control is provided.
In order to solve the problems of the technologies described above, the present invention has done further improvement to the guide and guard structure of existing milling train, it comprises crossbeam (2), connect into whole guide plate (3) with crossbeam (2), frame (7), topping roll (8), bottom roll (9), improvements of the present invention are: the two ends of described crossbeam (2) are provided with chute (5), the two ends of described frame (7) are fixed with slide rail (6), crossbeam (2) is fastened on the slide rail (6) by chute (5), establish power set (1) in crossbeam (2) lower end, power set (1) drive crossbeam (2) and move up and down along the slide rail (6) that is fixed on the frame (7) by chute (5).
For the ease of regulating this device, pointer (10) is installed on the end face of described crossbeam (2), on the frame end face, be fixed with rear sight (11).
(11) 0 of described rear sights determine be: the fixed-site of bottom roll 9 is constant, and guide plate 3 upper surfaces and bottom roll 9 upper surfaces are on the same horizontal plane, and at this moment pointer 10 position of pointing to rear sights 11 is decided to be 0.
Control method of the present invention comprises following several steps:
(1), calculate the altitude datum of inlet guide:
Calculate reduction in pass Δ h earlier, make the upper surface of guide plate (3) be lower than the upper surface of bottom roll (9), the relative altitude difference is Δ h/2;
(2), calculate the value of deformed area geometric shape coefficient l/ h:
Wherein: l is an asynchronous region length, and R is a roller radius, and Δ h is a reduction in pass, and H, h are respectively the rolled piece thickness of rolling front and back;
(3), determine that guide plate (3) departs from the actual height Δ y of reference position:
In order to prevent to bend down after rolled piece from going out roll gap, even after rolled piece goes out roll gap, the trend that upwarps is arranged, implement control, the value of deformed area geometric form coefficient l/ h with the corresponding value in the relevant range of Δ y is:
When l/ h＜1, get Δ y＞0
When 1＜l/ h＜1.9, get Δ y＜0
When l/ h＞1.9, get Δ y≤0 or Δ y＞0
Δ y value according to the milling train span of different model is:
5mm＜Δ y＜30mm the invention has the beneficial effects as follows: 1. the direction that can the On-line Control rolled piece goes out warpage behind the roll gap.2. can the On-line Control rolled piece go out behind the roll gap curved down.3. can determine reduction in pass by the Processes and apparatus ability, needn't limit reduction in pass because of plate shape warpage.4. can be convenient to implement control by the trend and the zone of the pre-drafting board shape of processing technology warpage.5. present technique measure control panel shape warpage is simple and easy to do, has general applicability.
Four, description of drawings Fig. 1 is a cut deal plate shape warpage On-line Control apparatus structure schematic diagram; Fig. 2 is the partial cutaway diagrammatic sketch of A-A among Fig. 1; Fig. 3 is the side diagrammatic sketch of Fig. 1; Fig. 4, Fig. 5 are the guide plate situation monitoring method schematic diagram of Fig. 1;
Five, the specific embodiment:
Below in conjunction with drawings and Examples the present invention is described in further detail:
Referring to Fig. 1, Fig. 2, Fig. 3.Cut deal plate shape warpage On-line Control device of the present invention comprises drive unit 1, and crossbeam 2 connects into whole guide plate 3 with crossbeam 2; Be provided with chute 5 at crossbeam 2 two ends, crossbeam 2 is fastened on the slide rail 6 by chute 5, and slide rail 6 is fixed on the frame 7.An end face in frame 7 is provided with rear sight 11, and pointer 10 is installed on the side end face of crossbeam 2.When rolling, rolled piece 4 is entered in the roll gap between topping roll 8 and the bottom roll 9 by guide plate 3 upper surfaces, and power set 1 drive crossbeam 2 and move up and down along the slide rail 6 that is fixed on the frame 7 by chute 5; The relative topping roll 8 in position, the bottom roll 9 that connect to whole guide plate 3 with crossbeam 2 also will change, thereby the angle that the rolled piece 4 that is placed on the guide plate 3 is entered between topping roll 8 and the bottom roll 9 changes, and guide plate 3 adjustable heights can be read by the position of pointer 10 indicated rear sights 11.0 of rear sight (11) determine be: the fixed-site of bottom roll 9 is constant, and guide plate 3 upper surfaces and bottom roll 9 upper surfaces are on the same horizontal plane, and at this moment pointer 10 position of pointing to rear sights 11 is decided to be 0, and promptly pointer 10 points to 0 scale of rear sights 11.
The effect of guide plate 3 is roll gap that guiding rolled piece 4 enters topping roll 8, bottom roll 9, also adopts roller-way in order to reduce friction or to scratch the rolled piece surface.
Fig. 4, Fig. 5 are the regulate and control method schematic diagram, the point of force application 12 of figure centering guide 3 and rolled piece 4 (measuring) by field condition, and H and h are respectively rolling front and back rolled piece thickness, l
xBe the horizontal range of upper and lower roll line of centres to point of force application 12, Δ h represents reduction in pass;
Realize that cut deal plate shape warpage On-Line Control Method step of the present invention is as follows:
(1), calculate the altitude datum of guide plate:
Regulating guide plate 3 positions, to make the upper surface relative altitude of upper surface and bottom roll 9 be the Δ h/2 (as shown in Figure 4) of certain passage when rolling, at this moment rolled piece 4 is in symmetric position along high to relative topping roll 8, bottom roll 9, and rolling centerline 13 overlaps (as shown in Figure 4) with rolling centerline 14.Position on pointer 10 rear sights 11 pointed is the reference position that guide plate 3 is regulated.
This reference position can shut out straight rolled piece theoretically, but operation of rolling influence factor complexity, rolled piece also can produce the warpage of different directions.Depart from the reference position by regulating guide plate 3, make rolled piece 4, thereby change the symmetry (as shown in Figure 5) that rolled piece enters roll gap along point of force application 12 liftings, make rolled piece go out roll gap after, have the trend that upwarps to implement control.
(2), calculate the value of deformed area geometric shape coefficient l/ h:
Wherein: l is an asynchronous region length, and R is a roller radius, and Δ h is a reduction in pass, and H, h are respectively the rolled piece thickness of rolling front and back;
(3), determine that guide plate 3 departs from the actual height Δ y of reference position
Usually the rolling rolled piece needs multi-pass that meets dimensions is rolling, therefore calculates the value of every time deformed area geometric shape coefficient l/ h when rolling respectively, determines the value of Δ y again.Effectively prevent rolled piece 4 operation of rolling warpages, the value of deformed area geometric shape coefficient l/ h with the corresponding value in the relevant range of Δ y is:
When l/ h＜1, get Δ y＞0
When 1＜l/ h＜1.9, get Δ y＜0
When l/ h＞1.9, get Δ y≤0 or Δ y＞0
Determining of Δ y value totally considered according to the scope of l/ h value, should adopt fuzzy method in the production, promptly departs from orientation, reference position certain value as long as satisfy.Usually to determine that according to present production reality, Δ y value according to the model span of milling train is by technology, appointed condition test:
5mm＜Δy＜30mm
Operation of rolling influence factor complexity is difficult to express with precise figures, and above-mentioned expression formula has reflected the basic law of template warpage when preventing that rolled piece is rolling, and when formulating process system, it is more reliable to make l/ h value depart from boundary value.
After choosing Δ y value by experience, also available Δ y=l
xTg θ calculates, as shown in Figure 5, the point of force application that a or a ' point contact with rolled piece 4 lower surfaces when being guide plate 3 liftings, 15 is rolled piece following table upper thread, it is parallel with the rolled piece center line, and a-a ' is that rolled piece 4 is along point of force application 12 lifting positions, when adjusting guide plate 3 departs from the reference position, at this moment rolled piece following table upper thread 15 forms angles with the rolling neutral conductor 14 | θ |, the height that guide plate 3 departs from the reference position is | Δ y|; When rolled piece deflection top roll 8 one sides, θ angle and Δ y get on the occasion of, during rolled piece deflection lower roll 9 one sides, θ angle and Δ y get negative value.Since milling train guide device difference, l
xAlso inequality, the theoretical value at the θ angle that calculates thus can reflect the rolled piece degree that tilts to nip, can be for reference.
When regulating and control by above step, the temperature of roller footpath, roller speed, roller temperature and the rolled piece of topping roll 8, bottom roll 9, lubricated remaining under the normal condition.
The present invention is adapted to the sheet material of all kinds mill milling unlike material.
Embodiment:
In model is cold rolling L1 aluminium sheet on the irreversible milling train of Φ 250 * 250mm two rollers, and aluminium sheet original thickness H is 30mm, and the mill product thickness h is 6mm.The rolling mill practice rolling schedule is:
30mm-29mm-26mm-23mm-20mm-17mm-14mm-11mm-9mm
-7.5mm-6mm
Bend down after wanting strict control rolled piece to go out roll gap when rolling, can upwarp trend.
(1), calculate the altitude datum of guide plate:
The variation of rolling mill practice reduction in pass is respectively 3mm, 2mm, 1.5mm, 1.0mm, so the difference in height Δ h/2 of guide plate 3 upper surfaces and bottom roll 9 upper surfaces is 1.5mm, 1.0mm, 0.75mm, 0.5mm.The reference position of guide plate 3 should be from 0 decline, pointer 10 point to respectively rear sight 11-1.5mm ,-1.0mm ,-0.75mm ,-0.5mm, write down this data, it is for referencial use to be provided with down regulating guide plate 3 positions.
(2), calculate the value of deformed area geometric shape coefficient l/ h:
The value computational chart of l/ h (roller footpath R=125mm)
Passage H h Δ h h
L/ h
1 30 29 1 29.5 11.8 0.37
2 29 26 3 27.5 19.36 0.70
3 26 23 3 24.5 19.36 0.79
4 23 20 3 21.5 19.36 0.90
5 20 17 3 18.5 19.36 1.05
6 17 14 3 15.5 19.36 1.24
7 14 11 3 12.5 19.36 1.54
8 11 9 2 10 15.8 1.58
9 9 7.5 1.5 8.25 13.69 1.66
10 7.5 6 1.5 6.75 13.69 2.02
(3), determine that guide plate 3 departs from the height of reference position:
Δ y value is considered to determine according to the scope of l/ h value is overall.Should adopt fuzzy obtaining value method in the production, promptly one group of the selected same orientation of l/ h value, Δ y value satisfies this regulation and control demand of organizing each passage simultaneously.It is bigger that Δ y value departs from the reference position in the reality, determined by equipment, experiment of process conditions, generally gets several millimeters to tens of millimeters.Δ y=l
xTg θ has theory significance, and is for reference during application, needn't every time adjusting.
Span according to l/ h value can obtain;
The 1-4 passage, Δ y＞0 is got in l/ h＜1, and guide plate 3 is by rising on the reference position;
The 5-9 passage, Δ y＜0 is got in 1＜l/ h＜1.9 o'clock, and guide plate 3 is descended by the reference position;
10 passages, Δ y≤0 or Δ y＞0 are got in l/ h＞1.9 o'clock, and the position of guide plate 3 is freely selected;
By above gained result, the 1-4 passage all requires Δ y＞0, and expression guide plate 3 rises, and holds up rolled piece 4 deflection topping rolls 8 sides, and rolled piece following table upper thread 15 forms angle+θ with rolling centerline 14, and selected Δ y value must be greater than any one benchmark index of 1-4 passage.Because Δ y value is big more, big more to operation of rolling influence, according to this apparatus and process condition and rolling test, Δ y gets 8.5mm and can meet the demands.Because 1-4 passage guide plate 3 indicated reference positions are up to-0.5,, regulate guide plate and make pointer 10 sensing rear sights 11 so guide plate 3 answers lifting position to be+8.5+ (0.5)=8 when rolling.In like manner, the 5-9 passage requires Δ y＜0, and expression guide plate 3 descends, and rolled piece 4 will be partial to lower roll 9 sides, and guide plate 3 down positions are-8.5+ (1.5)=-10 that promptly pointer 10 points to-10.
Regulate for convenience, can work out operation table:
The passage guide plate moves the orientation pointer index
1-4 rises and departs from maximal index (0.5) 8
5-9 descends and departs from minimal index (1.5)-10
10 freely determine in 8 to-10
Claims (5)
1, a kind of cut deal plate shape warpage On-line Control device, it comprises crossbeam (2), connects into whole guide plate (3), frame (7), topping roll (8), bottom roll (9) with crossbeam (2), it is characterized in that: the two ends of described crossbeam (2) are provided with chute (5), the two ends of described frame (7) are fixed with slide rail (6), crossbeam (2) is fastened on the slide rail (6) by chute (5), establish power set (1) in crossbeam (2) lower end, power set (1) drive crossbeam (2) and move up and down along the slide rail (6) that is fixed on the frame (7) by chute (5).
2, cut deal plate shape warpage On-line Control device according to claim 1 is characterized in that: pointer (10) is installed on the end face of described crossbeam (2), is fixed with rear sight (11) on the frame end face.
3, cut deal plate shape warpage On-line Control device according to claim 2, it is characterized in that: (11) 0 of described rear sights determine be: the fixed-site of bottom roll (9) is constant, guide plate (3) upper surface and bottom roll (9) upper surface are on the same horizontal plane, and at this moment the position of pointer (10) sensing rear sight (11) is decided to be 0.
4, a kind of control method of using the described cut deal plate of claim 1 shape warpage On-line Control device, it is characterized in that: it is realized according to following step: the altitude datum of (1), calculating inlet guide: calculate reduction in pass Δ h earlier, make the upper surface of guide plate (3) be lower than the upper surface of bottom roll (9), the relative altitude difference is Δ h/2; (2), calculate the value of deformed area geometric shape coefficient l/ h:
Wherein: l is an asynchronous region length, and R is a roller radius, and Δ h is a reduction in pass, and H, h are respectively the thickness of rolling front and back rolled pieces (4); (3), determine that guide plate (3) departs from the actual height Δ y of reference position: the value of deformed area geometric shape coefficient l/ h with the corresponding value in Δ y relevant range is:
When l/ h＜1, get Δ y＞0
When 1＜l/ h＜1.9, get Δ y＜0
When l/ h＞1.9, get Δ y≤0 or Δ y＞0
5, according to the control method of the described cut deal plate of claim 4 shape warpage On-line Control device, it is characterized in that: Δ y value according to the milling train span of different model is: 5mm＜Δ y＜30mm
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413610C (en) * | 2005-11-30 | 2008-08-27 | 宝山钢铁股份有限公司 | Control method for preventing head-bent of band-steel while milling course |
| CN102836883A (en) * | 2011-06-23 | 2012-12-26 | 宝山钢铁股份有限公司 | Control method for upward and downward head bending of plate blank |
| CN102836882A (en) * | 2012-08-20 | 2012-12-26 | 河北省首钢迁安钢铁有限责任公司 | Method for removing raising head caused by tape threading of hot rolled strip steel |
| CN105488263A (en) * | 2015-11-24 | 2016-04-13 | 广州兴森快捷电路科技有限公司 | Method for predicting warpage of package substrate subjected to resistance welding |
| CN105903770A (en) * | 2016-06-22 | 2016-08-31 | 山东钢铁股份有限公司 | Thin-steel-plate rolling adjusting device and method |
-
2003
- 2003-03-28 CN CN 03114584 patent/CN1206051C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413610C (en) * | 2005-11-30 | 2008-08-27 | 宝山钢铁股份有限公司 | Control method for preventing head-bent of band-steel while milling course |
| CN102836883A (en) * | 2011-06-23 | 2012-12-26 | 宝山钢铁股份有限公司 | Control method for upward and downward head bending of plate blank |
| CN102836883B (en) * | 2011-06-23 | 2014-08-20 | 宝山钢铁股份有限公司 | Control method for upward and downward head bending of plate blank |
| CN102836882A (en) * | 2012-08-20 | 2012-12-26 | 河北省首钢迁安钢铁有限责任公司 | Method for removing raising head caused by tape threading of hot rolled strip steel |
| CN102836882B (en) * | 2012-08-20 | 2015-12-16 | 北京首钢股份有限公司 | The removing method of nose is produced during a kind of hot-strip threading |
| CN105488263A (en) * | 2015-11-24 | 2016-04-13 | 广州兴森快捷电路科技有限公司 | Method for predicting warpage of package substrate subjected to resistance welding |
| CN105488263B (en) * | 2015-11-24 | 2018-10-19 | 广州兴森快捷电路科技有限公司 | The method of warpage after prediction package substrate welding resistance |
| CN105903770A (en) * | 2016-06-22 | 2016-08-31 | 山东钢铁股份有限公司 | Thin-steel-plate rolling adjusting device and method |
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| CN1206051C (en) | 2005-06-15 |
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