CN110014040A - Steel rolling roll change model - Google Patents
Steel rolling roll change model Download PDFInfo
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- CN110014040A CN110014040A CN201910239214.7A CN201910239214A CN110014040A CN 110014040 A CN110014040 A CN 110014040A CN 201910239214 A CN201910239214 A CN 201910239214A CN 110014040 A CN110014040 A CN 110014040A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a kind of steel rolling roll change models, comprising the following steps: step A, ignores in cold continuous rolling process and spreads；Step B, pass through two-stage arrangement and be uploaded to three-level PES system；Step C, l5Mouthful finished product length is shut out by measurement acid to obtain；Step D, then in roll floor-to-floor time section, each rack rolling milimeter number is obtained；Existing relationship between rolling milimeter number by researching and analysing 1#~5# rack working roll, the reduction ratio of the rolling milimeter number and each rack that use 5# rack calculate each rack rolling milimeter number of 1#~4# as computational element, obtain reasonable accurate milimeter number.The present invention, which can solve the roll change model existing defects in existing industrial automation, causes roll change according to missing, the problem of partial data inaccuracy.
Description
Technical field
The present invention relates to cold-strip steel manufacturing technology field, it is especially a kind of for steel rolling when control roll change mathematical modulo
Type.
Background technique
Cold-rolled strip production process process includes successively generally hot rolling, feeding uncoiling, welding, pickling, rolls, batches, beating
Bundle anneals, is smooth, rewinding oiling, batches, packs.Coil of strip needs when the roll steel transportation amount of rolling process reaches certain amount
Roll is replaced, common industrial automation (PES) roll change control is the tracking to roll steel transportation amount and realizes according to rolling kilometer
Number is as roll change according to progress roll change.
This enterprise cold rolling mill uses PES from December, 2016, has the following problems:
1#-3# rack working roll is to roll tonnage as roll change foundation；4#, 5# rack working roll are used as using rolling milimeter number and are changed
Roller foundation, wherein the rolling milimeter number of 5# rack be equal to the roll floor-to-floor time section in institute's rolled steel coils acid shut out mouthful finished product length it
It is equal to 5# rack rolling milimeter number multiplied by fixed coefficient 0.95 with the rolling milimeter number of, 4# rack.Level-one roll consumption has rolling
Milimeter number information, primary system rolls milimeter number calculation formula, and by taking 1# rack as an example, 1# rack working roll current linear velocity is v
(mpm), 10ms run-down, milimeter number s=v/60 of each scan period, the rolling in the machine period above and below working roll single
Milimeter number S=∑ s processed, since level one data can not be transmitted to second level, the data of second level also can not just be transmitted to three-level PES system
In, so 1#-3# rack fails to use rolling milimeter number as roll change foundation always.
By taking 1250mm pickling continuous-rolling as an example, the shelf number of the roll information 1#-5# of PES is respectively 301,302,303,
304,305, above and below working roll single in the machine period the corresponding rolling milimeter number of each rack calculate it is as follows: 1#(301), 2#
(302), 3#(303) rack working roll rolling milimeter number: it is equal to 5# rack working roll rolling milimeter number.4#(304) rack work
It is equal to 5#(305 as rolling milimeter number) rack working roll rolling milimeter number × 0.95；5# rack working roll rolls milimeter number etc.
The sum of product length is rolled into the corresponding acid of institute's rolled steel coils in roll floor-to-floor time section；Therefore in PES system roll rolling kilometer
Number only have 5#(305) rack be accurately, others are inaccurate.
In addition, coil of strip thickness is from 0.20mm~2.5mm, cold rolling feeds hot rolled coil thickness is from 2.0mm~4.8mm.Because of rolling
The difference of specification, it is larger according to the rolling milimeter number difference that will cause different size as roll change using rolling tonnage.Thus need
Will the roll change model to PES modify.
Summary of the invention
The problem to be solved by the invention is to provide a kind of steel rolling roll change models, to solve changing in existing industrial automation
Roller former existing defects cause roll change according to missing, the problem of partial data inaccuracy.
To solve the above-mentioned problems, the technical scheme is that this steel rolling roll change model the following steps are included:
Step A, ignore in cold continuous rolling process and spread,
1. being obtained by continuous rolling process second flow equal principle: Bi×hi×Vhi=Bi+1×hi+1×VH(i+1)；
It is spreaded 2. ignoring, by 1. obtaining in the unit time: hi×li= hi+1×li+1；
3. according to h in continuous rolling processi+1=Hi, li+1=Li；
4. by 2. 3. obtaining hi×li=Hi×Li；
5. can also be obtained by Volume conservation law: hi×li=Hi×Li；
6. by L 4. or 5. can be obtainedi=hi×li/Hi, wherein i=1,2,3,4,5；
7. setting absolute draft rate as εi, then Hi=hi/ (1- εi), wherein i=1,2,3,4,5；
8. by 6. 7. formula obtains: Li=li× (1- εi), wherein i=1,2,3,4,5；
9. the kinematic conditions of tandem rolling: Vhi=VH(i+1), then in the unit time, li=Li+1, i=1,2,3,4；
Similarly, li-1=Li, wherein i=2,3,4,5；
10. by 8. 9. formula obtains:
li-1=li× (1- εi), wherein i=2,3,4,5,
li=li+1× (1- εi+1), wherein i=1,2,3,4；
Step B, ε1、ε2、ε3、ε4、ε5Pass through two-stage arrangement and is uploaded to three-level PES system；
Step C, l5Mouthful finished product length is shut out by measurement acid to obtain:
l4=l5× (1- ε5),
l3=l4× (1- ε4)=l5× (1- ε5) × (1- ε4),
l2=l3× (1- ε3)=l5× (1- ε5) × (1- ε4) × (1- ε3),
l1=l2× (1- ε2)=l5× (1- ε5) × (1- ε4) × (1- ε3) × (1- ε2),
Step D, then in roll floor-to-floor time section, the calculation formula of each rack rolling milimeter number is as follows:
One rack rolls milimeter number S1=l1, wherein l1=l5× (1- ε5) × (1- ε4) × (1- ε3) × (1- ε2)；
Two racks roll milimeter number S2=l2, wherein l2=l5× (1- ε5) × (1- ε4) × (1- ε3)；
Three racks roll milimeter number S3=l3, wherein l3=l5× (1- ε5) × (1- ε4)；
Four racks roll milimeter number S4=l4, wherein l4=l5× (1- ε5)；
Five racks roll milimeter number S5=l5, wherein l5Acid for every coil in the roll floor-to-floor time rolls into product length；
Wherein: H is the inlet thickness of rack, and h is exit thickness, VHFor entrance velocity, VhFor muzzle velocity, B is exit width,
L is entrance length, and l is outlet length, HiFor the inlet thickness for indicating the i-th rack rolled piece, hiTo indicate going out for the i-th rack rolled piece
Mouth thickness, VHiFor the entrance velocity of the i-th rack rolled piece, VhiFor the muzzle velocity of the i-th rack rolled piece, BiIt is wide for the i-th rack rolled piece
Degree, LiFor entrance length, the l of the i-th rack rolled pieceiFor the outlet length of the i-th rack rolled piece.
In above-mentioned technical proposal, more specifically scheme may is that outlet material theoretical length and outlet material actual (tube) length
Degree compares amendment:
Outlet material physical length=outlet true weight × 109/ (material thickness × material width × 7.85), wherein material thickness is
Second level measurement gained thickness, material width are order width+20mm, and outlet true weight is the practical weighing institute in Mill Exit region
?；
Outlet material theoretical length=outlet true weight × 109/ (material thickness × material width × 7.85), wherein material thickness is
Order thickness, material width are order width+20mm, and outlet true weight is obtained by the practical weighing in Mill Exit region；
When outlet material physical length≤1.01 × outlet material theoretical length, five racks roll milimeter number l5=outlet material
Physical length；
When outlet material physical length > 1.01 × outlet material theoretical length, five racks roll milimeter number l5=outlet material
Theoretical length；
Wherein: length unit mm, unit of weight t.
Further: data are set as 1.01 sources as foundation, negative common difference value account for thickness ratio setting be with
0.01 is used as boundary, and continuous rolling process, which is ignored, to spread, and the ratio of thickness Reducing thickness is equal to the increased ratio of length, it can thinks long
Degree longest can increase by 0.01 times；When the physical length measured is greater than 1.01 times of theoretical length, then it is assumed that measured
Physical length it is insincere；When the physical length measured is less than or equal to 1.01 times of theoretical length, then it is assumed that measured
Physical length it is credible.
Further: establish rolling milimeter number early warning setting: the roller-changing rolling milimeter number for making each rack is wanted
It asks, roll change rolls milimeter number=roll change and rolls milimeter number target value ± float value, and rolling milimeter number target value is set as early warning and is rolled
Milimeter number processed, when rolling milimeter number arrival rolling milimeter number target value, early warning rolling milimeter number is displayed in red.
By adopting the above-described technical solution, compared with prior art, the present invention has the following advantages:
1, existing relationship between rolling milimeter number of this steel rolling roll change model by researching and analysing 1#~5# rack working roll, makes
The reduction ratio of the rolling milimeter number and each rack of using 5# rack calculates each rack rolling kilometer of 1#~4# as computational element
Number obtains reasonable accurate milimeter number；
2, the l that this steel rolling roll change model is uploaded to three-level PES system by studying second level5Accuracy.Tracking discovery, works as thickness
When tracking measurement occurs abnormal, the l that measures5Value and physical length difference farther out, are partially likely to be breached the difference of hundreds of times,
Therefore modified method is compared to guarantee three-level PES using " outlet material theoretical length " and " outlet material physical length "
System gets the relative precision of data；
3, this steel rolling roll change model counts in January, 2018 to 2018 by setting 1.01 sources as foundation for data
The ratio distribution that the negative common difference value in October point moon accounts for thickness is as follows: 0.004,0.006,0.005,0.004,0.005,0.001,
0.005,0.002,0.003,0.005, the ratio setting that negative common difference value accounts for thickness is using 0.01 as boundary；Continuous rolling process is ignored
It spreads, the ratio of thickness Reducing thickness is equal to the increased ratio of length, it can thinks that length longest can increase by 0.01 times.Work as survey
When the physical length measured is greater than 1.01 times of theoretical length, then it is assumed that measured physical length (outlet material actual (tube) length
Degree) it is insincere；When the physical length measured is less than or equal to 1.01 times of theoretical length, then it is assumed that measured actual (tube) length
It is credible to spend (outlet material physical length)；
4, for this steel rolling roll change model by establishing rolling milimeter number early warning setting, the roller-changing rolling for making each rack is public
Mileage requirement, roll change roll milimeter number=roll change and roll milimeter number target value ± float value, and rolling milimeter number target value is set as
Early warning rolls milimeter number, and when rolling milimeter number and reaching rolling milimeter number target value, early warning rolling milimeter number is displayed in red, to changing
Roller works to remind, and roll is replaced in realization as required；
This steel rolling roll change model efficiently solves 1#~5# rack working roll and all uses rolling milimeter number as roll change foundation, keeps away
Exempt to improve the science in roll change period, while in industry using rolling tonnage roll change bring work roll cooling security risk
Change more deep in terms of being merged with informationization.
Specific embodiment
The embodiment of the present invention is described in further detail below:
This steel rolling roll change model is column with Liu Gang cold rolling 1250mm pickling continuous-rolling:
One, material number L2181016605100, outlet material theoretical length are 3839973mm, and outlet material physical length is
3830959mm, outlet material physical length/outlet material theoretical length=1.00, then l5=3.831 kilometers.ε1、ε2、ε3、ε4、ε5
Respectively 0.3165,0.351,0.2975,0.2468,0.07, then
l4=l5× (1- ε5)=3.831 × (1-0.07)=3.5628 kilometer；
l3=l5× (1- ε5) × (1- ε4)=3.831 × (1-0.07) × (1-0.2468)=2.6835 kilometer；
l2=l5× (1- ε5) × (1- ε4) × (1- ε3)=3.831 × (1-0.07) × (1-0.2468) × (1-0.2975)=
1.8852 kilometer；
l1=l5× (1- ε5) × (1- ε4) × (1- ε3) × (1- ε2)=3.831 × (1-0.07) × (1-0.2468) × (1-
0.2975) × (1-0.351)=1.2235 kilometer；
Two, material number L2181016605200, outlet material theoretical length are 3836643mm, and outlet material physical length is
3959624mm, outlet material physical length/outlet material theoretical length=1.03, then l5=3.8366 kilometers.
ε1、ε2、ε3、ε4、ε5Respectively 0.3165,0.351,0.2975,0.2468,0.07, then
l4=l5× (1- ε5)=3.8366 × (1-0.07)=3.5681 kilometer；
l3=l5× (1- ε5) × (1- ε4)=3.8366 × (1-0.07) × (1-0.2468)=2.6875 kilometer；
l2=l5× (1- ε5) × (1- ε4) × (1- ε3)=3.8366 × (1-0.07) × (1-0.2468) × (1-0.2975)=
1.888 kilometer；
l1=l5× (1- ε5) × (1- ε4) × (1- ε3) × (1- ε2)=3.8366 × (1-0.07) × (1-0.2468) × (1-
0.2975) × (1-0.351)=1.2253 kilometer；
Three, the rolling milimeter number target value of hypothesis 1250mm pickling continuous-rolling 1# to 5# rack rolling milimeter number is respectively
S1 target、S2 targets、S3 targets、S4 targets、S5 targets, rolling milimeter number float value is respectively S1 floats、S2 float、S3 float、S4 float、S5 float；Roll kilometer
Number actual value is respectively S1PES、S2PES、S3PES、S4PES、S5PES；For 1# rack working roll, work as S1PES=S1 targetWhen, start early warning,
Work as S1PES∈[S1 target-S1 floats, S1 target+S1 floats] when, it can be with roll change；For 2# rack working roll, work as S2PES=S2 targetsWhen, start
S is worked as in early warning2PES∈[S2 targets-S2 float, S2 targets+S2 float] when, it can be with roll change；For 3# rack working roll, work as S3PES=S3 targetsWhen,
Start early warning, works as S3PES∈[S3 targets-S3 float, S3 targets+S3 float] when, it can be with roll change；For 4# rack working roll, work as S4PES=
S4 targetsWhen, start early warning, works as S4PES∈ [S4 targets-S4 float, S4 targets+S4 float] when, it can be with roll change；For 5# rack working roll, when
S5PES=S5 targetsWhen, start early warning, works as S5PES∈ [S5 targets-S5 float, S5 targets+S5 float] when, it can be with roll change.
Count in January, 2018 in October, 2018 point moon negative common difference value account for thickness ratio distribution it is as follows: 0.004,
0.006,0.005,0.004,0.005,0.001,0.005,0.002,0.003,0.005, the ratio that negative common difference value accounts for thickness is set
It is set to using 0.01 as boundary；Continuous rolling process, which is ignored, to spread, and the ratio of thickness Reducing thickness is equal to the increased ratio of length, it can
Think that length longest can increase by 0.01 times.When the physical length measured is greater than 1.01 times of theoretical length, then it is assumed that institute
The physical length (outlet material physical length) measured is insincere；When the physical length measured is less than or equal to 1.01 times of reason
When by length, then it is assumed that measured physical length (outlet material physical length) is credible.
This steel rolling roll change model efficiently solve 1#~5# rack working roll all use rolling milimeter number as roll change according to
According to, it avoids using rolling tonnage roll change bring work roll cooling security risk, improves the science in roll change period, while
Industrialization is more deep in terms of merging with informationization.
Claims (5)
1. a kind of steel rolling roll change model, it is characterised in that the following steps are included:
Step A, ignore in cold continuous rolling process and spread,
1. being obtained by continuous rolling process second flow equal principle: Bi×hi×Vhi=Bi+1×hi+1×VH(i+1)；
It is spreaded 2. ignoring, by 1. obtaining in the unit time: hi×li= hi+1×li+1；
3. according to h in continuous rolling processi+1=Hi, li+1=Li；
4. by 2. 3. obtaining hi×li=Hi×Li；
5. can also be obtained by Volume conservation law: hi×li=Hi×Li；
6. by L 4. or 5. can be obtainedi=hi×li/Hi, wherein i=1,2,3,4,5；
7. setting absolute draft rate as εi, then Hi=hi/ (1- εi), wherein i=1,2,3,4,5；
8. by 6. 7. formula obtains: Li=li× (1- εi), wherein i=1,2,3,4,5；
9. the kinematic conditions of tandem rolling: Vhi=VH(i+1), then in the unit time, li=Li+1, i=1,2,3,4；
Similarly, li-1=Li, wherein i=2,3,4,5；
10. by 8. 9. formula obtains:
li-1=li× (1- εi), wherein i=2,3,4,5,
li=li+1× (1- εi+1), wherein i=1,2,3,4；
Step B, ε1、ε2、ε3、ε4、ε5Pass through two-stage arrangement and is uploaded to three-level PES system；
Step C, l5Mouthful finished product length is shut out by measurement acid to obtain:
l4=l5× (1- ε5),
l3=l4× (1- ε4)=l5× (1- ε5) × (1- ε4),
l2=l3× (1- ε3)=l5× (1- ε5) × (1- ε4) × (1- ε3),
l1=l2× (1- ε2)=l5× (1- ε5) × (1- ε4) × (1- ε3) × (1- ε2),
Step D, then in roll floor-to-floor time section, the calculation formula of each rack rolling milimeter number is as follows:
One rack rolls milimeter number S1=l1, wherein l1=l5× (1- ε5) × (1- ε4) × (1- ε3) × (1- ε2)；
Two racks roll milimeter number S2=l2, wherein l2=l5× (1- ε5) × (1- ε4) × (1- ε3)；
Three racks roll milimeter number S3=l3, wherein l3=l5× (1- ε5) × (1- ε4)；
Four racks roll milimeter number S4=l4, wherein l4=l5× (1- ε5)；
Five racks roll milimeter number S5=l5, wherein l5Acid for every coil in the roll floor-to-floor time rolls into product length；
Wherein: H is the inlet thickness of rack, and h is exit thickness, VHFor entrance velocity, VhFor muzzle velocity, B is exit width, L
For entrance length, l is outlet length, HiFor the inlet thickness for indicating the i-th rack rolled piece, hiFor the outlet for indicating the i-th rack rolled piece
Thickness, VHiFor the entrance velocity of the i-th rack rolled piece, VhiFor the muzzle velocity of the i-th rack rolled piece, BiFor the i-th rack rolled piece width,
LiFor entrance length, the l of the i-th rack rolled pieceiFor the outlet length of the i-th rack rolled piece.
2. steel rolling roll change model according to claim 1, it is characterised in that: outlet material theoretical length and outlet material are real
Border length compares amendment:
Outlet material physical length=outlet true weight × 109/ (material thickness × material width × 7.85), wherein material thickness is two
Grade measurement gained thickness, material width are order width+20mm, and outlet true weight is obtained by the practical weighing in Mill Exit region；
Outlet material theoretical length=outlet true weight × 109/ (material thickness × material width × 7.85), wherein material thickness is to order
Goods thickness, material width are order width+20mm, and outlet true weight is obtained by the practical weighing in Mill Exit region；
When outlet material physical length≤1.01 × outlet material theoretical length, five racks roll milimeter number l5=outlet material is real
Border length；
When outlet material physical length > 1.01 × outlet material theoretical length, five racks roll milimeter number l5=outlet material reason
By length；
Wherein: length unit mm, unit of weight t.
3. steel rolling roll change model according to claim 1 or 2, it is characterised in that: data are set as 1.01 as foundation
Source, the ratio setting that negative common difference value accounts for thickness is using 0.01 as boundary, and continuous rolling process, which is ignored, to spread, the ratio of thickness Reducing thickness
Example is equal to the increased ratio of length, it can thinks that length longest can increase by 0.01 times；When the physical length measured is greater than
When 1.01 times of theoretical length, then it is assumed that measured physical length is insincere；When the physical length measured is less than or equal to
When 1.01 times of theoretical length, then it is assumed that measured physical length is credible.
4. steel rolling roll change model according to claim 1 or 2, it is characterised in that: establish rolling milimeter number early warning setting: system
The roller-changing rolling milimeter number requirement of each rack is set, roll change rolls milimeter number=roll change rolling milimeter number target value ± and floats
Rolling milimeter number target value is set as early warning rolling milimeter number by dynamic value, when rolling milimeter number reaches rolling milimeter number target value
When, early warning rolling milimeter number is displayed in red.
5. steel rolling roll change model according to claim 3, it is characterised in that: establish rolling milimeter number early warning setting: formulating
The roller-changing rolling milimeter number requirement of good each rack, roll change roll milimeter number=roll change and roll ± the floating of milimeter number target value
Rolling milimeter number target value is set as early warning rolling milimeter number by value, when rolling milimeter number arrival rolling milimeter number target value,
Early warning rolling milimeter number is displayed in red.
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| CN114178319A (en) * | 2021-11-17 | 2022-03-15 | 首钢智新迁安电磁材料有限公司 | Control method and device of rolling equipment and computer equipment |
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