CN105188972B - The milling method and rolling device of uneven steel plate - Google Patents
The milling method and rolling device of uneven steel plate Download PDFInfo
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- CN105188972B CN105188972B CN201480016367.0A CN201480016367A CN105188972B CN 105188972 B CN105188972 B CN 105188972B CN 201480016367 A CN201480016367 A CN 201480016367A CN 105188972 B CN105188972 B CN 105188972B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2205/00—Particular shaped rolled products
- B21B2205/02—Tailored blanks
Abstract
The present invention provides the milling method and rolling device of uneven steel plate.The milling method for the uneven steel plate that the present invention is provided can improve the yield rate of uneven steel plate.Computing (step ST7) is carried out to the excess length of thinner wall section based on the actual lateral section product (step ST1) of the heavy section calculated when once rolling.Next, the mill length to above-mentioned thinner wall section in the way of the excess length according to thinner wall section matches somebody with somebody remaining side sectional area to heavy section and above-mentioned thin-walled portion carries out computing (step ST8~step ST12).Moreover, carrying out secondary rolling by the mill length LX (Sx) of the thinner wall section calculated.
Description
Technical field
The present invention relates to the inequality to having heavy section and the thickness of slab thinner wall section different from heavy section in long side direction is thick
Milling method and rolling device that steel plate (differential thickness steel plate) is manufactured.
Background technology
When manufacturing slab, typically in a multiple orders of slab (slab) distribution as thickness of slab identical product steel plate
And rolled.But, the not abundant situation that can not find appropriate compound object of product steel plate, time of delivery in small lot
Under, cause to be rolled with the low state of yield rate.
On the other hand, carry out rolling in the uneven thickness that the different multiple product steel plates of a slab distribution thickness of slab are rolled
System, thus improve the free degree of combination and realize avoid rolling low yield rate.
In the slab for being assigned with thickness of slab identical product steel plate, because slab cuts off the deviation of precision, rolling accuracy
Deviation, as a result, there is the length of the product steel plate needed for can not ensuring.In this case, in general same slab most
The disconnected product of egress is unqualified because of curtailment.Therefore, if by assigning excess length (extra length) come in advance will be into
Product rate is set as relatively low, then can reduce the disqualification rate as caused by curtailment.Yield rate with as caused by curtailment not
Qualification rate is compromise (tradeoff) relation, therefore the general total losses that carries out is minimum yield rate setting.
On the other hand, in uneven thick rolling, the length that product steel plate can be taken is ensured respectively in heavy section and thinner wall section
Degree, i.e., need to distribute appropriate excess length respectively to heavy section and thinner wall section.
As the milling method of existing uneven steel plate, for example, it is known to the technology of patent document 1.
The milling method of the uneven steel plate of patent document 1 is following method：Make rolled steel plate according to correspondence thickness
The mode of thicker product steel plate is once rolled and formed after heavy section, according to the side of the product steel plate of correspondence thinner thickness
Formula carries out secondary rolling and forms thinner wall section, thus carries out uneven thick rolling.In patent document 1, steel is obtained after once rolling
The actual lateral section product of plate, by the actual lateral section product, the predetermined side with the side needed for acquisition product steel plate set in advance
Sectional area is compared, and in the case where actual lateral section product is smaller than predetermined side sectional area, is ensured in weight, time of delivery
Heavy section or the roll control of the mill length of thinner wall section that the high product steel plate of aspect priority is included.In actual side
In the case that sectional area is bigger than predetermined side sectional area, premised on remainder is equably distributed into heavy section, thinner wall section, examine
Considering priority of product steel plate etc. changes allotment ratio.
It is (thick using the product size of uneven steel plate in the case where calculating predetermined side sectional area in patent document 1
The predetermined length and predetermined thickness of wall portion, the predetermined length and predetermined thickness of thinner wall section).
Patent document 1：Japanese Unexamined Patent Publication 11-147102 publications
However, the thickness (actual (real) thickness) of the heavy section of uneven steel plate is determined after once rolling.In patent document 1
In, actual lateral section is accumulated with having used the predetermined side sectional area of the predetermined thickness of above-mentioned heavy section to be compared to thin-walled
The mill length in portion is modified, and the actual (real) thickness of heavy section and the error of predetermined thickness once rolled is not considered.
Therefore, patent document 1 can not accurately calculate actual lateral section product (actual lateral area) with making a reservation for
Remaining side sectional area between lateral section product (estimated lateral area), it is impossible to heavy section, thin-walled portion with most
Good excess length, therefore there is the worry of the yield rate reduction of uneven steel plate.
The content of the invention
The present invention is to complete in view of the foregoing, it is therefore intended that offer can improve the yield rate of uneven steel plate
Uneven steel plate milling method.
To achieve these goals, the milling method of the uneven steel plate of an embodiment has following such feature.
[1] a kind of milling method of uneven steel plate, makes rolled steel plate according to the thicker product steel plate of correspondence thickness
Mode once rolled and formed after heavy section, by correspondence thinner thickness product steel plate in the way of carry out secondary roll
Make and form thinner wall section, thus carry out uneven thick rolling,
In the milling method of above-mentioned uneven steel plate,
Actual lateral section product based on the above-mentioned heavy section calculated when once rolling, has more than needed to above-mentioned thinner wall section
Length carries out computing,
Remaining side sectional area is matched somebody with somebody to above-mentioned heavy section and above-mentioned thin-walled portion with the excess length according to the thinner wall section
Mode, computing is carried out to the mill length of above-mentioned thinner wall section,
Secondary rolling is carried out by the mill length of the above-mentioned thinner wall section calculated.
[2] in the milling method for the uneven steel plate that [1] is recorded, the actual lateral section product of above-mentioned heavy section passes through by thickness
The actual (real) thickness of above-mentioned heavy section that degree meter thickness of slab is calculated and based on being obtained from the pulse generating device being connected with working roll
Signal value above-mentioned heavy section physical length, carry out computing.
[3] in the milling method for the uneven steel plate that [1] or [2] is recorded, it is higher than in the excess length of above-mentioned thinner wall section
In the case of allowable upper limit value, using the half of above-mentioned allowable upper limit value as above-mentioned heavy section excess length, by above-mentioned permission
The remaining half of higher limit as above-mentioned thinner wall section excess length.
[4] a kind of rolling device, one is carried out making rolled steel plate in the way of the thicker product steel plate of correspondence thickness
It is secondary rolling and formed after heavy section, by correspondence thinner thickness product steel plate in the way of carry out it is secondary rolling and form thin-walled
Portion, thus carries out uneven thick rolling,
In the rolling device,
Possess controller, actual lateral section product of the controller noted above based on the above-mentioned heavy section calculated when once rolling
To carry out the excess length of above-mentioned thinner wall section computing, and with the excess length according to the thinner wall section to above-mentioned heavy section and
Mode of the above-mentioned thin-walled portion with remaining side sectional area carries out computing to the mill length of above-mentioned thinner wall section,
Secondary rolling is carried out by the mill length of the above-mentioned thinner wall section calculated by controller.
[5] in the rolling device that [4] are recorded, the actual lateral section product of above-mentioned heavy section passes through by thickness gauge thickness of slab computing
The actual (real) thickness of the above-mentioned heavy section gone out and based on the upper of the signal value obtained from the pulse generating device being connected with working roll
The physical length of heavy section is stated, carrys out computing.
[6] in the rolling device that [4] or [5] are recorded, it is higher than allowable upper limit value in the excess length of above-mentioned thinner wall section
In the case of, using the half of above-mentioned allowable upper limit value as above-mentioned heavy section excess length, by the surplus of above-mentioned allowable upper limit value
Remaining half as above-mentioned thinner wall section excess length.
According to the milling method of the uneven steel plate of the present invention, the reality based on the heavy section calculated when once rolling
Lateral section product to carry out computing to the excess length of thinner wall section, with the excess length according to the thinner wall section to heavy section and thin
Mode of the wall part with remaining side sectional area carries out computing to the mill length of thinner wall section, by the rolling of the thinner wall section calculated
Length carries out secondary rolling, and computing is carried out therefore, it is possible to the excess length accurately to thinner wall section, can be with the thinner wall section
Excess length proportionally matches somebody with somebody remaining side sectional area to heavy section and thin-walled portion, therefore, it is possible to make the finished product of uneven steel plate
Rate is improved.
Brief description of the drawings
Fig. 1 is the schematic diagram for the rolling mill for representing the reversible of the present invention.
Fig. 2 is the figure of the flow for the milling method for representing the uneven steel plate of the present invention.
Fig. 3 be represent the present invention once roll after heavy section shape and secondary rolling after uneven steel plate
The figure of shape.
Fig. 4 is the flow chart for the mill length setting processing for representing the thinner wall section of the present invention.
Embodiment
Hereinafter, referring to the drawings to mode (the hereinafter referred to as embodiment for implementing the present invention.) said in detail
It is bright.
Fig. 1 shows the rolling mill 1 by slab S being rolled and being obtained the reversible of uneven steel plate.
Rolling mill 1 possess above and below working roll 2 and backing roll (backup roll) 3 up and down.Working roll 2 up and down it
Between aperture (roll gap) adjusted by aperture change mechanism 4.Aperture change mechanism 4 is referred to by the aperture from controller 5
The aperture of each passage (pass) is changed in order to set.Rolling loads during rolling are examined by force cell (load cell) 6
Survey, its detected value is exported to controller 5.Reference 8 is the wide meter of the wide plate being measured of plate to heavy section Y described later
(plate width meter).Reference 9 is the bench roller (table roll) for carrying slab S towards working roll 2.In work
Make roller 2 and first pulse generating device 7 is installed, will be produced by corresponding first pulse generating device 7 of rotation with working roll 2
Umber of pulse export to controller 5.Second pulse generating device 10 is installed in bench roller 9, will be corresponding by the rotation with bench roller 9
The second pulse generating device 10 produce umber of pulse export to controller 5.
Fig. 2 is the figure of the flow of the milling method for the uneven steel plate for representing present embodiment.
As shown in Fig. 2 for the milling method of the uneven steel plate of present embodiment, first, the work above and below
Make the once rolling that roller 2 carries out slab S, so as to form the thickness of the long side direction for obtaining the thicker multiple product steel plates of thickness of slab
Spend uniform heavy section Y.Next, the working roll 2 above and below carries out secondary rolling until in heavy section Y long side direction
On the way, thus formed with heavy section Y, for obtain the thinner wall section X and heavy section Y of the relatively thin multiple product steel plates of thickness of slab with
The uneven steel plate 11 of end difference Z between thinner wall section X.
At the computing of the mill length setting for the thinner wall section that reference picture 3 and Fig. 4 are carried out to the controller 5 of present embodiment
Reason is illustrated.Fig. 3 be the heavy section Y after representing once to roll shape and secondary rolling after uneven steel plate 11 shape
The figure of shape, Fig. 4 is the flow chart for the mill length setting processing for representing thinner wall section.
In the mill length setting processing of Fig. 4 thinner wall section, in step ST1, to once rolling after heavy section Y
The material head length Δ Lf of front and rear end, Δ Lt, the end difference Z of actual lateral section product Sj and uneven steel plate 11 length
(end difference length) D carries out computing.End difference Z end difference length D is from the heavy section Y with uneven steel plate 11 prestored
The corresponding extracting data of the products thickness of products thickness and thinner wall section X.
In material head length (crop length) Δ Lf, Δ Lt, actual lateral section product Sj concrete operation processing, first,
If controller 5 detects that slab S once rolling starts, the step-by-step counting from the first pulse generating device 7 is proceeded by.
The wide measured value of plate after the rolling that the wide meter 8 of tablet is measured to, and to the width for the leading section that heavy section Y is identified from the measured value
The count number Cf of pulse during untill the effective width that degree can be taken as product set in advance is stored.Profit
With the pulse count number Cf of the storage, preceding sliding rate F set in advance, unit length (mm/ pulses) If of pulse and work
The center line of roller 2 and plate the distance between 8 R of wide meter, to heavy section Y front material head length Δ as shown in following formula (1)
Lf carries out computing and stored.
Δ Lf=Cf (1+F) If-R ... (1)
If controller 5 detects that rolling terminates by the rolling loads measured value from force cell 6, proceed by
Step-by-step counting from the second pulse generating device 10, if being identified by the wide measured value of plate from the wide meter 8 of plate after rolling
Below the effective width that a width of product set in advance of plate of heavy section Y rearward end can be taken, then stop coming from the second arteries and veins
The step-by-step counting of generation device 10 is rushed, and the pulse count number Ct during this is stored.Utilize the pulse count number
Ct, unit length (mm/ pulses) It of pulse set in advance, the center line of working roll 2 and plate the distance between 2 R of wide meter, such as
Computing is carried out to heavy section Y rear end side material head length Δ Lt like that shown in following formula (2) and stored.
Δ Lt=Ct × It-R ... (2)
Controller 5 utilizes roll gap (the roll gap before the rolling loads measured value P from force cell 6, rolling；ロ
One Le ギ ヤ Star プ) M, mill stiffness (mill modulus；ミ Le fixed number) K, to thickness gauge thickness of slab as shown in following formula (3)
(gage-meter plate thickness) T carries out computing and stored.
T=M+P/K ... (3)
Terminate if controller 5 goes out once rolling by the signal detection from force cell 6, stop coming from the first arteries and veins
The counting of the pulse of generation device 7 is rushed, and to the pulse count number from rolling start time to the finish time once rolled
Cm is stored.Using the pulse count number Cm of the storage, preceding sliding rate F set in advance, pulse unit length (mm/ arteries and veins
Punching) Im, as shown in following formula (4) to once rolling after heavy section Y total length L progress computing and store.
L=Cm (1+F) Im ... (4)
Controller 5 using the thickness gauge thickness of slab T of storage as actual (real) thickness, using heavy section Y total length L as physical length,
Computing is carried out to actual lateral section product Sj as shown in following formula (5) and stored.
Sj=T × L ... formulas (5)
As shown in figure 3, once the sectional area of the heavy section Y of the heavy section Y after rolling side accumulates Sj for actual lateral section.
The actual lateral section product Sj is the predetermined side sectional area Sy and remaining side sectional area set in advance obtained required for product steel plate
Sa sums.
In the step ST2 of the mill length setting processing of the thinner wall section shown in Fig. 4, to thinner wall section X target thickness Tx
Carry out computing.Thinner wall section X target thickness Tx is the slightly larger value of thickness of the product steel plate than thinner wall section X.
In step ST3, Sj, heavy section Y article length Ly, heavy section Y rear end side material are accumulated using actual lateral section
Head length Δ Lt, end difference Z end difference length D, thickness gauge thickness of slab T, thinner wall section X target thickness Tx, consider thermal expansion
COEFFICIENT K, computing is carried out to the mill length LXc of interim thinner wall section as shown in following formula (6).
LXc=(Sj- (Ly+ Δ Lt+D) × K × T)/(Tx × K) ... formula (6)
Next, in step ST4, mill length LXc by the use of interim thinner wall section, as relative to thinner wall section X's
The defined ratio of thickness and set coefficient C, as heavy section Y rear end side material head deviation compensation rate coefficient D, such as
Computing is carried out to heavy section Y excess length Lya like that shown in following formula (7).
Lya=LXc × C+D ... formulas (7)
Next, in step ST5, utilizing heavy section Y article length Ly, heavy section Y rear end side material head length Δ
Lt, end difference Z end difference length D, the COEFFICIENT K for considering thermal expansion, heavy section Y excess length Lya, such as following formula (8) institute
Show and computing is carried out to heavy section Y mill length LY like that.
LY=(Ly+ Δ Lt+D) × K+Lya ... formulas (8)
In step ST6, Sj, heavy section Y mill length LY, thickness gauge thickness of slab T, thinner wall section are accumulated using actual lateral section
X target thickness Tx, the COEFFICIENT K for considering thermal expansion, are carried out as shown in following formula (9) to thinner wall section X mill length LX
Computing.
LX=(Sj-LY × T)/(Tx × K) ... formula (9)
In step ST7, using thinner wall section X mill length LX, thinner wall section X article length Lx, heavy section Y front end
Side material head length Δ Lf, end difference Z end difference length D, set as the defined ratio of the thickness relative to thinner wall section X
Coefficient C, computing is carried out to thinner wall section X excess length Lxa as shown in following formula (10).
Lxa=LX- (Lx+ Δ Lf+D) × (1+C) ... formula (10)
In step ST8, the excess length Lxa by the step ST7 thinner wall section X calculated, the rolling with thinner wall section X are carried out
The permission lower limit Lmin (for example, 500mm) of length comparison.
In the case where thinner wall section X excess length Lxa is less than lower limit Lmin is allowed, moves to step ST9 and carry out first
Distribution processing more than needed.In addition, in the case where thinner wall section X excess length Lxa is allows more than lower limit Lmin, moving to step
ST10。
In step ST10, thinner wall section X excess length Lxa, the allowable upper limit value with thinner wall section X mill length are carried out
Lmax (for example, 1000mm) comparison.Moreover, being thin-walled in thinner wall section X excess length Lxa by step ST10 judgement
In the case of below the allowable upper limit value Lmax of portion X mill length, move to step ST11 and carry out the second distribution processing more than needed,
In the case of the allowable upper limit value Lmax of thinner wall section X mill lengths of the excess length Lxa higher than thinner wall section X, step is moved to
ST12 and carry out the 3rd distribution processing more than needed.
In step ST9 the first distribution processing more than needed, thinner wall section X excess length Lxa is less value, therefore to logical
The mill length LX for crossing the thinner wall section X that formula (9) is calculated is set.
Step ST13 is moved to, thinner wall section X mill length LX is exported as the roll control value Sx of thinner wall section.
Had more than needed the second of step ST11 in distribution processing, using heavy section Y mill length LY, thinner wall section X it is more than needed
Length Lxa, the permission lower limit Lmin of thinner wall section X mill length, thinner wall section X target thickness Tx, consider thermal expansion
COEFFICIENT K and thickness gauge thickness of slab T, carry out heavy section Y mill length LY computing again as shown in following formula (11).
LY=LY+ (Lxa-Lmin)/2 × (Tx × K)/T ... formulas (11)
In addition, in the second distribution processing more than needed, utilizing thinner wall section X mill length LX, thinner wall section X excess length
Lxa, permission lower limit Lmin, carry out thinner wall section X mill length LX computing again as shown in following formula (12).
LX=LX- (Lxa-Lmin)/2 ... formula (12)
So, in second has more than needed with handling, lower limit Lmin half will be allowed as heavy section Y excess length,
Lower limit Lmin remaining half will be allowed as thinner wall section X excess length.
Step ST13 is moved to, is exported thinner wall section X mill length LX as the roll control value Sx of thinner wall section.
In addition, in step ST12 the 3rd distribution processing more than needed, utilizing heavy section Y mill length LY, allowing the upper limit
Shown in value Lmax, thinner wall section X target thickness Tx, the COEFFICIENT K for considering thermal expansion and thickness gauge thickness of slab T, such as following formula (13)
Heavy section Y mill length LY computing again is carried out like that.
LY=LY+Lmax/2 × (Tx × K)/T ... formulas (13)
In the 3rd distribution processing more than needed, thinner wall section X mill length LX, such as allowable upper limit value Lmax, following formula are utilized
(14) thinner wall section X mill length LX computing again is carried out shown in like that.
LX=LX-Lmax/2 ... formulas (14)
So, it is more than needed with processing the 3rd, using allowable upper limit value Lmax half as heavy section Y excess length,
Using allowable upper limit value Lmax remaining half as thinner wall section X excess length.
Step ST13 is moved to, is exported thinner wall section X mill length LX as the roll control value Sx of thinner wall section.
Controller 5 based on by the first of step ST9 have more than needed distribution processing, step ST11 the second distribution processing more than needed or
The mill length LX for the thinner wall section X that the distribution processing more than needed of the 3rd of step ST12 is calculated carries out secondary rolling, so as to form tool
Have between heavy section Y, the thinner wall section X for obtaining the relatively thin multiple product steel plates of thickness of slab and heavy section Y and thinner wall section X
End difference Z uneven steel plate 11.
Next, the effect to present embodiment is illustrated.
In the mill length setting processing of the thinner wall section of present embodiment, carried out according to thinner wall section X excess length Lxa
First~the 3rd distribution processing (Fig. 4 step ST7~step ST12) more than needed.In the present embodiment, according to thinner wall section X richness
Remaining length Lxa distributes residual area to heavy section Y and thinner wall section X, therefore, it is possible to prevent heavy section Y and thinner wall section X length
A problem that degree is not enough, can make yield rate manufacture uneven steel plate 11 with being greatly reduced.
As shown in figure 3, passing through force cell 6, first and the second pulse generating device immediately after once rolling
7th, 10 measured value carries out computing to actual lateral section product Sj, and accumulates excess lengths of the Sj to thinner wall section X based on actual lateral section
Lxa carries out computing, therefore, it is possible to accurately distribute residual area to heavy section Y and thinner wall section X.
In the case where thinner wall section X excess length Lxa is higher than allowable upper limit value Lmax, by the one of allowable upper limit value Lmax
Partly as heavy section Y excess length, (walked allowable upper limit value Lmax remaining half as thinner wall section X excess length
Rapid ST12), and residual area is reliably distributed to both heavy section Y and thinner wall section X, therefore, it is possible to reliably prevent length not
Sufficient a problem that.
The explanation of reference
2 ... working rolls；3 ... backing rolls；4 ... aperture change mechanism；5 ... controllers；6 ... force cells；7 ... first arteries and veins
Rush generation device；The wide meter of 8 ... plates；9 ... bench rollers；10 ... second pulse generating devices；11 ... uneven steel plates；Δ Lf ... heavy sections
Front material head length；The rear end side material head length of Δ Lt ... heavy sections；C ... as the thickness relative to thinner wall section regulation
Ratio and the coefficient that sets；D ... as the compensation rate of the deviation of the rear end side material head of heavy section coefficient；T ... thickness gauge plates
Thick (actual (real) thickness of heavy section)；The total length (physical length of heavy section) of L ... heavy sections；The actual lateral section products of Sj ...；Sy…
Predetermined side sectional area；Sa ... remaining side sectional areas；The roll control value of Sx ... thinner wall sections；Y ... heavy sections；X ... thinner wall sections；Tx…
The target thickness of thinner wall section；The article length of Ly ... heavy sections；The article length of Lx ... thinner wall sections；K ... considers thermal expansion
Coefficient；The mill length of thinner wall section interim LXc ...；The excess length of Lya ... heavy sections；The excess length of Lxa ... thinner wall sections；
The mill length of LX ... thinner wall sections；The mill length of LY ... heavy sections；The permission lower limit of the mill length of Lmin ... thinner wall sections；
The allowable upper limit value of the mill length of Lmax ... thinner wall sections.
Claims (6)
1. a kind of milling method of uneven steel plate, makes rolled steel plate in the way of the thicker product steel plate of correspondence thickness
Once rolled and formed after heavy section, by correspondence thinner thickness product steel plate in the way of carry out it is secondary rolling until
The midway of the long side direction of the heavy section and form thinner wall section, thus carry out uneven thick rolling,
The milling method of the uneven steel plate is characterised by,
Actual lateral section product, the mill length of heavy section and heavy wall based on the heavy section calculated when once rolling
The actual (real) thickness in portion, the excess length to the thinner wall section carries out computing,
Match somebody with somebody the side of remaining side sectional area to the heavy section and the thin-walled portion with the excess length according to the thinner wall section
Formula, the mill length to the thinner wall section carries out computing,
Secondary rolling is carried out by the mill length of the thinner wall section calculated.
2. the milling method of uneven steel plate according to claim 1, it is characterised in that
The actual lateral section product of the heavy section by the actual (real) thickness of the heavy section that is calculated by thickness gauge thickness of slab and
The physical length of the heavy section based on the signal value obtained from the pulse generating device being connected with working roll, carrys out computing.
3. the milling method of uneven steel plate according to claim 1 or 2, it is characterised in that
In the case where the excess length of the thinner wall section is higher than allowable upper limit value, by the length of the half of the allowable upper limit value
The excess length of the heavy section is added to, will be subtracted from the excess length of the thinner wall section obtained by the half of the allowable upper limit value
Value as the thinner wall section excess length.
4. a kind of rolling device, is once rolled making rolled steel plate in the way of the thicker product steel plate of correspondence thickness
And formed after heavy section, secondary rolling is carried out in the way of the product steel plate of correspondence thinner thickness up to the heavy section
The midway of long side direction and form thinner wall section, thus carry out uneven thick rolling,
The rolling device is characterised by,
Possess controller, actual lateral section product, thickness of the controller based on the heavy section calculated when once rolling
The mill length of wall portion and the actual (real) thickness of heavy section to carry out the excess length of the thinner wall section computing, and should with basis
The excess length of thinner wall section and to the mode of the heavy section and the thin-walled portion with residual area to the thinner wall section
Mill length carries out computing,
Secondary rolling is carried out by the mill length of the thinner wall section calculated by controller.
5. rolling device according to claim 4, it is characterised in that
The actual lateral section product of the heavy section by the actual (real) thickness of the heavy section that is calculated by thickness gauge thickness of slab and
The physical length of the heavy section based on the signal value obtained from the pulse generating device being connected with working roll, carrys out computing.
6. the rolling device according to claim 4 or 5, it is characterised in that
In the case where the excess length of the thinner wall section is higher than allowable upper limit value, by the length of the half of the allowable upper limit value
The excess length of the heavy section is added to, will be subtracted from the excess length of the thinner wall section obtained by the half of the allowable upper limit value
Value as the thinner wall section excess length.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013069933 | 2013-03-28 | ||
| JP2013-069933 | 2013-03-28 | ||
| PCT/JP2014/001507 WO2014156045A1 (en) | 2013-03-28 | 2014-03-17 | Rolling method and rolling device for differential thickness steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105188972A CN105188972A (en) | 2015-12-23 |
| CN105188972B true CN105188972B (en) | 2017-10-24 |
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| JP (1) | JP5924450B2 (en) |
| KR (1) | KR101681492B1 (en) |
| CN (1) | CN105188972B (en) |
| BR (1) | BR112015024576B1 (en) |
| WO (1) | WO2014156045A1 (en) |
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| KR101990955B1 (en) | 2017-10-11 | 2019-06-20 | 주식회사 포스코 | Rolling mill speed control apparatus and rolling mill control method using the same |
| TWI670124B (en) * | 2018-11-12 | 2019-09-01 | 中國鋼鐵股份有限公司 | Steel strip thickness control method |
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| JPS6186012A (en) * | 1984-10-03 | 1986-05-01 | Kawasaki Steel Corp | Control method of rolling mill at time of changing sheet-thickness in running |
| JPS61193712A (en) * | 1985-02-22 | 1986-08-28 | Nippon Steel Corp | Production of hot strip |
| EP1035928A1 (en) * | 1997-11-07 | 2000-09-20 | Siemens Aktiengesellschaft | Process and device for rolling a rolled strip with a variable thickness |
| JP3520188B2 (en) * | 1997-11-17 | 2004-04-19 | 新日本製鐵株式会社 | Rolling method of different thickness steel plate |
| JP4203328B2 (en) * | 2003-01-21 | 2008-12-24 | 新日本製鐵株式会社 | Tapered plate manufacturing method |
| DE102004023885A1 (en) * | 2004-05-12 | 2005-12-08 | Muhr Und Bender Kg | Flexible rolling of light metals |
| JP2006272386A (en) * | 2005-03-29 | 2006-10-12 | Jfe Steel Kk | Thickness control method of deformed steel plate |
| CN1850376A (en) * | 2006-04-29 | 2006-10-25 | 东北大学 | Method for rolling trapezoidal width steel plate |
| CN1850375A (en) * | 2006-04-29 | 2006-10-25 | 东北大学 | Method for continuously rolling variable-thickness steel plate |
| CN101602065B (en) * | 2009-07-07 | 2011-04-27 | 东北大学 | Micro-tracking method and system of rolled pieces in the process of rolling periodic variable-thickness strips |
-
2014
- 2014-03-17 KR KR1020157027239A patent/KR101681492B1/en active IP Right Grant
- 2014-03-17 BR BR112015024576-5A patent/BR112015024576B1/en active IP Right Grant
- 2014-03-17 WO PCT/JP2014/001507 patent/WO2014156045A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2014156045A1 (en) | 2017-02-16 |
| BR112015024576B1 (en) | 2023-01-17 |
| WO2014156045A1 (en) | 2014-10-02 |
| JP5924450B2 (en) | 2016-05-25 |
| KR101681492B1 (en) | 2016-12-01 |
| CN105188972A (en) | 2015-12-23 |
| BR112015024576A2 (en) | 2017-07-18 |
| KR20150126005A (en) | 2015-11-10 |
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