CN106311757B - A kind of method for reducing Wide and Thick Slab and cutting damage - Google Patents
A kind of method for reducing Wide and Thick Slab and cutting damage Download PDFInfo
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- CN106311757B CN106311757B CN201610878305.1A CN201610878305A CN106311757B CN 106311757 B CN106311757 B CN 106311757B CN 201610878305 A CN201610878305 A CN 201610878305A CN 106311757 B CN106311757 B CN 106311757B
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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
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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
- B21B37/72—Rear end control; Front end control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The Wide and Thick Slab method of cutting damage is reduced the present invention relates to a kind of, valley can effectively reduce swarf amount in fish tail value and edge end to end by reasonably controlling steel plate, so as to improve the lumber recovery of Wide and Thick Slab.Compared with prior art, cut damage amount using the steel plate after the inventive method to significantly reduce, the lumber recovery of every block of steel plate can improve 0.2% 0.7% or so.
Description
Technical field
The invention belongs to Plate rolling technical field, is specifically originally related to a kind of method for reducing Wide and Thick Slab and cutting damage.
Background technology
In the operation of rolling of Wide and Thick Slab, steel plate crop damage accounts for 26.0% of total losses or so, and swarf damage accounts for total damage
23.0% or so of consumption.It can be seen that the damage of cutting of Wide and Thick Slab accounts for 49.0% of total losses or so.However, Wide and Thick Slab flat shape is good
Bad to determine that it cuts the size of damage value, it cuts the height that the size of damage value directly reflects its lumber recovery；Therefore, control can be passed through
Steel plain shape improves its lumber recovery.The factor for influenceing Wide and Thick Slab flat shape is numerous (of the invention just for MAS flat shapes
Controlled rolling), mainly include：Rolling mode, MAS control accuracies, blank shape, AGC etc.；Wherein, the step of MAS rollings
Height is to control the principal element of steel plain shape, can effectively be controlled by the shoulder height for reasonably adjusting MAS rollings
The edge and Head and Tail Shape of steel plate.Circular arc evagination, steel plate edge are barrel-shaped end to end for steel plate, dovetail is larger end to end for steel plate, steel plate edge
The larger grade of indent can cause increasing considerably for swarf amount.
The bad problem of rear flat shape is rolled for Wide and Thick Slab, there is substantial amounts of research in currently available technology, MAS rollings,
DBR rollings, featheredge broadening rolling, edger roll pressure measurement rolling, without trimming rolling.The big Heavy Plate Rolling Line of most domestic
Using the flat shape of MAS rollings control Wide and Thick Slab, its lumber recovery is set to be greatly enhanced.However, its steel plate is end to end
And shape not being optimal, i.e. finished product steel plate head tail and the micro- evagination of edge, straight or micro- indent, such is end to end and side
It is still larger that portion's shape cuts damage value.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of method for reducing Wide and Thick Slab and cutting damage, can effectively subtracted
Few steel plate cuts damage value, improves the lumber recovery of Wide and Thick Slab.
The present invention solve above technical problem technical scheme be：
A kind of method for reducing Wide and Thick Slab and cutting damage, is rolled for MAS plan view controls, including：
(i) by controlling the shoulder height value of broadening passage MAS rollings to control the Head and Tail Shape of Wide and Thick Slab, steel plate is made
It is in fish tail shape end to end, the interior valley a of the fish tail is relevant with the broadening ratio and compression ratio of steel plate, and its value is as shown in table 1；
Table 1：
(ii) the shoulder height value that passage MAS rollings are shaped by controlling controls the shape of Wide and Thick Slab, makes steel plate side
Portion is in micro- inner concavity, and interior valley is 10-20mm.
Specifically include following steps：
(1) the steel plain shape that will be sheared is detected first with flat shape detection means on shear line, obtained
Take the flat shape and data of steel plate；
(2) according to valley at and steel plate tail fish in the maximum of the steel plate head tail data screening steel plate head fish tail obtained
Valley aw in the maximum of tail, solves at and aw average value, and is averaged the interior valley a that value is designated as steel plate fish tail end to end；
(3) according to the steel plate edge shape and data screening steel plate side left side maximum evagination value bz and maximum indent obtained
Value cz, the screening steel plate side maximum evagination value by the right and valley cy in maximum, solves bz and by average value, and be averaged value
The maximum evagination value b of steel plate edge is designated as, solves cz and cy average value, and is averaged the most imperial palace that value is designated as steel plate edge
Valley c；
(4) a, b, c value of acquisition are fed back into milling train level two, milling train level two is by a, b, c value and target of feedback
Value is compared, and changes corresponding MAS rolling parameters, that is, the shoulder height value h of MAS rollings is changed, after changing rolling
Steel plate valley a in fish tail end to end；
(5) amended MAS rolling parameters are applied to follow-up same broadening ratio and the Plate rolling of same ratio of elongation,
Ensure that the interior valley a of amended steel plate fish tail end to end is close or equal with the value in table 1, it is ensured that amended steel plate edge is in
Micro- inner concavity, and interior valley is 10-20mm, i.e., b values are not present and c values take 10-20mm.
The beneficial effects of the invention are as follows：Using above-mentioned technical proposal, compared with prior art：Roll rear steel plate end to end and side
Portion cuts damage and significantly reduced, and lumber recovery can improve 0.2%-0.7% or so, can be that Wide and Thick Slab manufacturing enterprise brings significant economic effect
Benefit.
Above-mentioned steel plate end to end fish tail a and edge convex or concave schematic shapes as shown in figure 1, wherein solid rectangular line is enclosed
Into region be steel plate edge evagination when shear scope, shearing when dotted line area defined is steel plate edge indent
Region；Rolled piece longitudinal section after being rolled using MAS is as shown in Figure 3.
Brief description of the drawings
Fig. 1 is steel plate fish tail a and edge evagination b or indent c schematic shapes end to end.
Fig. 2 is Fig. 1 partial enlarged drawing.
Fig. 3 is the rolled piece longitudinal section after being rolled using MAS.
Fig. 4 is the control method flow chart of the present invention.
Embodiment
In order that the above-mentioned purpose of the present invention, feature and advantage can be easier to understand, below in conjunction with example to the present invention
Elaborate：
Embodiment one：Q690D high-strength plates；
Billet size：260×2070×2792mm；Order size：25×2500×21600mm；
Rolling mode：It is vertical-horizontal-vertical；
Broadening ratio：1.23；
Method flow is as shown in figure 4, comprise the following steps that：
Primary condition：The shoulder height h of rolled piece is 2.6mm after the MAS rollings of shaping passage, is rolled after broadening passage MAS rollings
The shoulder height h of part is 3.0mm.
Rolling terminates flat shape detection means on rear shear line and is detected and obtained to rolling rear steel plain shape
Steel plain shape data, the steel plate data of feedback are：Steel plate 25 × 2533 × 23195mm of actual size, steel plate head fish tail
Interior valley at is -40mm, and valley aw is -20mm in steel plate tail fish tail, and can trying to achieve steel plate, valley a is -30mm in fish tail end to end；
Valley cz is 32mm, cy 25mm in steel plate edge maximum, and it is 29.5mm that can try to achieve valley c in steel plate edge maximum；
By above-mentioned data feedback to milling train level two, level two will detect value of feedback and be carried out with the desired value in table 1
Compare, it is determined that the shoulder height adjustment trend of shaping and broadening passage MAS rollings；
According to understanding for step 3, milling train level two operative employee should reduce the MAS rolling step height value h of shaping passage,
And increase the MAS rolling step height values h of broadening passage；
To the Plate rolling of same broadening when same ratio of elongation, above-mentioned 4 steps are repeated, until steel plate fish tail end to end
Interior valley and the interior valley of steel plate edge reach desired value, and preserve the shoulder height value of shaping passage and broadening passage now
h。
The MAS rollings step height value h for shaping passage is adjusted to 2.2mm, the MAS rolling steps of broadening passage by the present invention
Height value h is adjusted to 3.6mm, and gained plate size is 25 × 2533 × 23238mm.Valley at is in steel plate head fish tail
104mm, valley aw is 98mm in steel plate tail fish tail；Valley cz is 15mm, cy 17mm in steel plate edge maximum.According to the above
Data analysis is understood, during using the inventive method, the effective length of steel plate is 22548mm；During using prior art, steel plate has
Effect length is 22495mm.It can be seen that 53mm is added using the effective length of steel plate during the inventive method.It is converted into becoming a useful person for steel plate
Rate understands that the lumber recovery of steel plate improves 0.23%.
Embodiment two：S355J low carbon-structural steel plates；
Billet size：260×2070×2792mm；Order size：35×3500×11000mm；
Rolling mode：It is vertical-horizontal-vertical；
Broadening ratio：1.74；
Method flow is as shown in figure 4, comprise the following steps that：
1st, primary condition：The shoulder height h of rolled piece is 4.2mm after the MAS rollings of shaping passage, after broadening passage MAS rollings
The shoulder height h of rolled piece is 0.2mm.
2nd, rolling terminates flat shape detection means on rear shear line and is detected and obtained to rolling rear steel plain shape
Steel plain shape data is taken, the steel plate data of feedback are：Steel plate 35 × 3650 × 11760mm of actual size, steel plate head fish
Valley at is 0mm in tail, and valley aw is -10mm in steel plate tail fish tail, and can trying to achieve steel plate, valley a is -5mm in fish tail end to end；
Valley cz is 25mm, cy 20mm in steel plate edge maximum, and it is 22.5mm that can try to achieve valley d in steel plate edge maximum；
3rd, by above-mentioned data feedback to milling train level two, level two is entered value of feedback is detected with the desired value in table 1
Row compares, it is determined that the shoulder height adjustment trend of shaping and broadening passage MAS rollings；
4th, understood according to step 3, milling train level two operative employee should reduce the MAS rolling step height values of shaping passage
H, and increase the MAS rolling step height values h of broadening passage；
5th, to the Plate rolling of same broadening when same ratio of elongation, above-mentioned 4 steps are repeated, until steel plate fish end to end
Valley and the interior valley of steel plate edge reach desired value in tail, and preserve the shoulder height of shaping passage and broadening passage now
Value h.
The MAS rollings step height value h for shaping passage is adjusted to 4mm by the present invention, and the MAS rolling steps of broadening passage are high
Angle value h is adjusted to 1.2mm, and gained plate size is 35 × 3650 × 11845mm.Valley at is 80mm in steel plate head fish tail,
Valley aw is 85mm in steel plate tail fish tail；Valley cz is 13mm, cy 16mm in steel plate edge maximum.According to data above point
Analysis is understood, during using the inventive method, the effective length of steel plate is 11585mm；During using prior art, the effective length of steel plate
For 11500mm.It can be seen that 85mm is added using the effective length of steel plate during the inventive method.The lumber recovery for being converted into steel plate can
Know, the lumber recovery of steel plate improves 0.74%.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domains of application claims.
Claims (1)
1. a kind of method for reducing Wide and Thick Slab and cutting damage, is rolled for MAS plan view controls, including：
(i) by controlling the shoulder height value of broadening passage MAS rollings to control the Head and Tail Shape of Wide and Thick Slab, steel plate is made end to end
In fish tail shape, then the interior valley a of steel plate fish tail end to end is relevant with the broadening ratio and compression ratio of steel plate, and its value is as shown in table 1；
Table 1：
(2) the shoulder height value that passage MAS rollings are shaped by controlling controls the shape of Wide and Thick Slab, makes steel plate edge
In micro- inner concavity, interior valley is 10-20mm；
It is characterized in that：Specifically include following steps：
(1) the steel plain shape that will be sheared is detected first with flat shape detection means on shear line, obtained
The flat shape and data of steel plate；
(2) according to valley in the maximum of the steel plate head tail data screening steel plate head fish tail obtained and steel plate tail fish tail
Valley aw in maximum, solves at and aw average value, and is averaged the interior valley a that value is designated as steel plate fish tail end to end；
(3) according to valley cz in the steel plate edge shape and data screening steel plate left side maximum evagination value bz that are obtained and maximum,
Maximum evagination value by and valley cy in maximum on the right of steel plate is screened, solves bz and by average value, and be averaged value and be designated as steel
The maximum evagination value b in edges of boards portion, solves cz and cy average value, and is averaged value and is designated as valley c in the maximum of steel plate edge；
(4) a, b, c value of acquisition are fed back into milling train level two, milling train level two is by a, b, c value and desired value of feedback
It is compared, and changes corresponding MAS rolling parameters, that is, changes broadening passage MAS rollings and shape passage MAS rollings
Shoulder height value h, so as to change the interior valley a of the steel plate fish tail end to end after rolling；
(5) amended MAS rolling parameters in step (4) are applied to the Wide and Thick Slab of follow-up same broadening ratio and same compression ratio
Rolling, it is ensured that the interior valley a of amended steel plate fish tail end to end is close or equal with the value in table 1, it is ensured that amended steel plate
Edge is in micro- inner concavity, and interior valley is 10-20mm, i.e., b values are not present and c values take 10-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878305.1A CN106311757B (en) | 2016-10-08 | 2016-10-08 | A kind of method for reducing Wide and Thick Slab and cutting damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878305.1A CN106311757B (en) | 2016-10-08 | 2016-10-08 | A kind of method for reducing Wide and Thick Slab and cutting damage |
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| Publication Number | Publication Date |
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| CN106311757A CN106311757A (en) | 2017-01-11 |
| CN106311757B true CN106311757B (en) | 2018-03-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4238946A (en) * | 1977-04-04 | 1980-12-16 | Kawasaki Steel Corporation | Method for rolling metal plate |
| CN102974624A (en) * | 2012-12-06 | 2013-03-20 | 秦皇岛首秦金属材料有限公司 | Edge plane shape control method of large-expansion-ratio high strength grade pipeline steel |
| CN103252347A (en) * | 2012-02-21 | 2013-08-21 | 宝山钢铁股份有限公司 | Continuous cast slab head and tail shape pre-controlling method capable of reducing hot-rolled intermediate slab head and tail cutting quantities |
| CN104747891A (en) * | 2013-12-30 | 2015-07-01 | 福建三钢闽光股份有限公司 | Intermediate blank rolled piece shape control method after last-pass broadening during medium plate production |
-
2016
- 2016-10-08 CN CN201610878305.1A patent/CN106311757B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4238946A (en) * | 1977-04-04 | 1980-12-16 | Kawasaki Steel Corporation | Method for rolling metal plate |
| CN103252347A (en) * | 2012-02-21 | 2013-08-21 | 宝山钢铁股份有限公司 | Continuous cast slab head and tail shape pre-controlling method capable of reducing hot-rolled intermediate slab head and tail cutting quantities |
| CN102974624A (en) * | 2012-12-06 | 2013-03-20 | 秦皇岛首秦金属材料有限公司 | Edge plane shape control method of large-expansion-ratio high strength grade pipeline steel |
| CN104747891A (en) * | 2013-12-30 | 2015-07-01 | 福建三钢闽光股份有限公司 | Intermediate blank rolled piece shape control method after last-pass broadening during medium plate production |
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| CN106311757A (en) | 2017-01-11 |
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