CN104826873B - Tandem mills starts the control method regardless of rouleau - Google Patents
Tandem mills starts the control method regardless of rouleau Download PDFInfo
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- CN104826873B CN104826873B CN201410048854.7A CN201410048854A CN104826873B CN 104826873 B CN104826873 B CN 104826873B CN 201410048854 A CN201410048854 A CN 201410048854A CN 104826873 B CN104826873 B CN 104826873B
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- coil
- strip
- unit
- tandem mills
- rouleau
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/18—Automatic gauge control
- B21B37/20—Automatic gauge control in tandem mills
-
- 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
- B21B37/46—Roll speed or drive motor control
Abstract
The present invention relates to a kind of tandem mills and start the control method regardless of rouleau, including: tandem mills outlet coiling machine coiling band steel；Monitoring strip steel actual (real) thickness, calculates " virtual sleeve " coil diameter time up to standard；Next procedure unit combines " virtual sleeve " coil diameter and calculates uncoiler coil of strip length in real time, carries out throwing tail operation time up to standard.Control method of the present invention, without increasing any equipment investment, can realize mill star-up not bundling, does not interferes with the normal production of next procedure unit simultaneously, is conducive to promoting cold rolling production efficiency, reduces and produces ton steel cost and cold rolling useless fall.
Description
Technical field
The present invention relates to a kind of control method for tandem mills, especially a kind of tandem mills starts
Regardless of the control method of rouleau, belong to steel rolling Computer Control Technology field.
Background technology
According to the applicant understood, in the actual production process of the Total continuity high-speed rolling Thin Strip Steel of modernization, often
Because reasons such as technique roll change, accident broken belt, cancel closedowns, need tandem mills is restarted operation.
In tandem mills initial start stage, owing to unit plate shape and THICKNESS CONTROL do not arrive optimum efficiency, cause strip steel
Head quality cannot be qualified.
For this situation, tandem mills outlet is generally used to start cutting rouleau technique: mill star-up is built
, low speed jerking motion, coiling machine uses the first reel coiling band steel, when milling train outlet belt steel thickness reach technique
After requirement, operative employee operates outlet and cuts and carry out strip steel and cut work, and coiling machine is switched to the second reel and carries
Coil of strip takes production, lays down the first reel simultaneously and improves quality underproof little coiled strip steel.
The main cause using this technique is as follows: (1) milling train plate shape and THICKNESS CONTROL in start-up course are not
Preferably.For the certified products coil of strip that output is qualified, the underproof strip steel produced when needing to cut away startup.Cut
The rouleau strip length fallen about 300 meters.(2) next procedure unit strip length following calculation is based on
Same belt steel thickness value, therefore milling train does not allows to there is belt steel thickness inequality to the feed of next procedure unit
Situation.
But, the subject matter that this technique exists is: the outlet coil of strip bag being susceptible to cause because of bundling is bad
Accident occur, and low speed jerking motion reduces rolling mill speed usage factor, affects the performance of unit production capacity.
There presently does not exist the patent documentation finding and solving this technical problem.
Summary of the invention
The technical problem to be solved is: overcome the problem that prior art exists, it is provided that a kind of cold company
Roll the unit starting control method regardless of rouleau, it is not necessary to mill star-up cutting rouleau, also do not interfere with lower road
The normal production of operation unit.
The technical scheme that the present invention solves its technical problem is as follows:
A kind of tandem mills starts the control method regardless of rouleau, it is characterized in that, comprises the following steps:
The first step, tandem mills start, start rolled band steel, and coiling machine starts to batch outlet strip steel；Institute
State coiling machine and be positioned at tandem mills exit；Go to second step；
Second step, continue to monitor outlet strip steel actual (real) thickness；When actual (real) thickness is positioned in the range of preset thickness,
Go to the 3rd step；
3rd step, according to outlet strip steel linear velocity V of current time and coiling machine motor rotary speed N, calculate and work as
The coil of strip coil diameter of front moment coiling machine coiling, and using this coil diameter as " virtual sleeve " coil diameter D0；Go to
4th step；
4th step, after strip steel all rolls, the coil of strip on coiler mandrel is sent to next procedure
The uncoiler of unit, and coil of strip actual information is sent to next procedure unit；Uncoiler is positioned at next procedure
The porch of unit；Described coil of strip actual information includes: belt steel thickness h, coil of strip outer diameter D and " virtual
Sleeve " coil diameter D0；Go to the 5th step；
5th step, described next procedure unit start to produce, uncoiler uncoiling simultaneously；Coil of strip outer diameter D is with life
The product time increases and gradually decreases；Described next procedure unit according to belt steel thickness h, coil of strip outer diameter D and
" virtual sleeve " coil diameter D0Calculate uncoiler coil of strip length L in real timeOpen；LOpenReduce with D and reduce, work as LOpenWhen being down in the range of preset length, described next procedure unit speed reducing stopping, carry out throwing tail operation, excision
Residual strip containing " virtual sleeve "；Control terminates.
Applicant finds through going deep into practical studies, and the next procedure unit after tandem mills contains the most admittedly
Throw tail flow chart, thrown by next procedure unit if the defective strip steel that tandem mills starts generation changes
Tail, then need not use tandem mills outlet to start cutting rouleau technique.Applicant grinds through practice further
Study carefully and finally draw above-mentioned control method, successfully defective strip steel can be thrown tail excision, be not required to cutting little
Volume.
First strip steel after rolling is all batched formation coil of strip on same reel by this control method, outside this coil of strip
Circle is defective strip steel for qualified strip steel, inner ring；Meanwhile, the uneven thickness defective for inner ring strip steel formed
Little coil of strip as " virtual sleeve ", thus whole non-standard coil of strip is converted to the standard coil of strip of band sleeve；
Then, in conjunction with coil of strip parameter and " virtual sleeve " coil diameter, the length of qualified strip steel, next procedure are calculated
Unit carries out uncoiling to coil of strip, when uncoiling residue length reaches this calculating Len got, carries out throwing tail operation,
The most defective strip steel is excised.
The technical scheme that control method of the present invention is the most perfect is as follows:
Preferably, in the 3rd step, described " virtual sleeve " coil diameterIt is highly preferred that D0's
Unit be the unit that unit is rpm, V of mm, N be mpm.
Preferably, in the 5th step, described uncoiler coil of strip lengthIt is highly preferred that LOpenThe unit that the unit that unit is m, h is mm, D be mm, D0Unit be mm.
Preferably, in the 5th step, described preset length scope is that predetermined process throws tail length X and next procedure
Unit braking distance Y sum.
Preferably, in second step, use the calibrator monitoring outlet strip steel being positioned at tandem mills exit real
Border thickness；In 3rd step, use the laser velocimeter monitoring outlet strip steel line being positioned at tandem mills exit
Speed V, uses coiling machine motor encoder monitoring coiling machine motor rotary speed N.
Preferably, in the 4th step, described coil of strip actual information also includes: coil of strip number, coil of strip weight.
Compared with prior art, beneficial effects of the present invention is as follows:
(1) outlet of existing tandem mills starts in cutting rouleau technique, and mill star-up carries after dividing rouleau
Steel winding the most again, can cause inner ring strip steel to produce when bundling due to reasons such as roll-force is high, bundling mistakes
The mass defects such as raw plate shape, scroll are bad, and after using control method of the present invention, it is not necessary to divide rouleau again, can
Thoroughly avoid above quality of production hidden danger, the most also can reduce the throwing tail amount of next procedure unit, improve cold rolling
Full operation lumber recovery.
(2) tandem mills is when producing the strip steel of Thin Specs, hightension, and general employing steel sleeve is come
Prevent coil of strip from collapsing volume, flat volume phenomenon, and the outlet of existing tandem mills starts cutting rouleau technique and needs to use
To two sleeves, sleeve volume of the circular flow is high, brings bigger pressure to Factory Logistics；And use controlling party of the present invention
After method, sleeve volume of the circular flow can be greatly reduced, thus improve Factory Logistics.
(3) use after control method of the present invention, unit can be avoided because cutting rouleau and reduction of speed, and avoid batching
Machine secondary threading, is conducive to keeping tandem mills operational efficiency, keeping scroll stable.
(4) control method of the present invention is without increasing any equipment investment, can realize mill star-up not bundling,
Do not interfere with the normal production of next procedure unit simultaneously, be conducive to promoting cold rolling production efficiency, reduce and produce
Ton steel cost and cold rolling useless fall.
Accompanying drawing explanation
Fig. 1 is the main process schematic diagram of the embodiment of the present invention 1.
Fig. 2 is the layout schematic diagram of Continuous mill train outlet coiling machine in Fig. 1 embodiment test case.
Fig. 3 is the layout schematic diagram of continuous annealing unit entrance uncoiler in Fig. 1 embodiment test case.
Detailed description of the invention
It is described in further detail with reference to the accompanying drawings and in conjunction with the embodiments to the present invention.But the present invention does not limits
In given example.
Embodiment 1
As it is shown in figure 1, the present embodiment tandem mills starts the control method regardless of rouleau, including following step
Rapid:
The first step, tandem mills start, start rolled band steel, and coiling machine starts to batch outlet strip steel；Institute
State coiling machine and be positioned at tandem mills exit；Go to second step；
Second step, employing are positioned at the calibrator in tandem mills exit and continue to monitor outlet strip steel reality thickness
Degree；When actual (real) thickness is positioned in the range of preset thickness, go to the 3rd step；
3rd step, according to outlet strip steel linear velocity V of current time and coiling machine motor rotary speed N, calculate and work as
The coil of strip coil diameter of front moment coiling machine coiling, and using this coil diameter as " virtual sleeve " coil diameter D0；" empty
Pseudo-sleeve " coil diameterD0The unit that the unit that unit is mm, N is rpm, V be mpm；
Use laser velocimeter monitoring outlet strip steel linear velocity V being positioned at tandem mills exit, use coiling machine
Motor encoder monitoring coiling machine motor rotary speed N；Go to the 4th step；
4th step, after strip steel all rolls, the coil of strip on coiler mandrel is sent to next procedure
The uncoiler of unit, and coil of strip actual information is sent to next procedure unit；Uncoiler is positioned at next procedure
The porch of unit；Described coil of strip actual information includes: belt steel thickness h, coil of strip outer diameter D, " virtual sleeve "
Coil diameter D0, coil of strip number, coil of strip weight etc.；Go to the 5th step；
5th step, described next procedure unit start to produce, uncoiler uncoiling simultaneously；Coil of strip outer diameter D is with life
The product time increases and gradually decreases；Described next procedure unit according to belt steel thickness h, coil of strip outer diameter D and
" virtual sleeve " coil diameter D0Calculate uncoiler coil of strip length L in real timeOpen, uncoiler coil of strip lengthLOpenThe unit that the unit that unit is m, h is mm, D be mm, D0Unit be
mm；LOpenReduce with D and reduce, work as LOpenWhen being down in the range of preset length, described next procedure unit subtracts
Speed is shut down, and carries out throwing tail operation, the excision residual strip containing " virtual sleeve "；Preset length scope is pre-
If technique throws tail length X and next procedure unit braking distance Y sum；Control terminates.
Test case is as follows:
With Baosteel 1420 cold rolling mill 5 frame acid Continuous mill train and continuous annealing unit as subjects, two units
Relation for upper and lower operation.It is continuous annealing unit feed that hard volume is rolled in sour rolling mill production, is finally completed strip steel acid
Wash, cold rolling, annealing, flattening process.
Hot rolling supplied materials thickness 2.0mm, width 939mm, acid Continuous mill train export goal thickness 0.2mm, acid is rolled
Generation coil of strip number: 10231454900.Being embodied as step is:
(1) " virtual sleeve " coil diameter sampling
Acid Continuous mill train exports the layout of coiling machine as in figure 2 it is shown, 1 is acid Continuous mill train end machine frame rolling mill, and 2
For calibrator, 3 is laser velocimeter, and 4 is coiling machine, and 5 is coiling machine motor encoder, and D ＇ is coiling machine
Upper coil of strip overall diameter.Computer control system is sentenced according to the strip steel real-time thickness of outlet calibrator detection
Not；When the milling train real-time belt steel thickness numerical stability of outlet is in the range of 0.2mm ± 2%, computer control system
Coil diameter sampled signal is sent to coil diameter computing module.
(2) sour rolling mill " virtual sleeve " coil diameter calculates
After coil diameter computing module receives this coil diameter sampled signal, the band recorded according to milling train outlet laser velocimeter
Steel wire speed V and coiling machine motor encoder record coiling machine motor rotary speed N, calculate according to formula A
To coil of strip coil diameter during machine set outlet strip steel arrival desired value, and in this, as " virtual sleeve " coil diameter D0；
Formula A:D0The unit that the unit that unit is mm, N is rpm, V be mpm.
In this test case, " virtual sleeve " coil diameter value of calculation is 627mm, i.e. D0=627mm.
(3) this coil of strip rolls off the production line after having rolled completely, can be by existing method acquisition coil of strip actual information:
Coil of strip external diameter 1703mm, weight 14.29T, thickness 0.21mm.Level2 system generation coil of strip number:
10231454900, and D0Transfer to together with coil of strip with coil of strip actual informations such as outer diameter D, thickness h, weight
Continuous annealing unit.
(4) layout of continuous annealing unit entrance uncoiler is as it is shown on figure 3,5 is uncoiler, and 6 is continuous annealing unit
Idler roller, 7 is uncoiler motor encoder, and 8 is idler roller motor encoder, DMeterFor coil of strip on uncoiler
Overall diameter.Continuous annealing unit 1# uncoiler feeding, coil of strip number is 10231454900.When uncoiler uncoiling,
Computer system calculates, according to formula B, length L that on uncoiler, strip steel is real-timeOpen,
Formula B:LOpenThe unit that the unit that unit is m, h is mm, D be mm,
D0Unit be mm.
In this test case, coil of strip length LOpenInitial value is: 9092 meters.Strip length L on uncoilerOpen
Along with the increase of production run time gradually decreases.
(5) in existing technique, for ensureing the reliability of welding, even move back operative employee and would generally set necessarily
Technique throw tail length X, such as 50 meters；Certainly, this throwing tail length does not includes " virtual sleeve " strip length；
Meanwhile, computer control system according to the current speed of service of unit and default decel slope based on existing method is come
Calculate by present speed to the braking distance Y needed that stops.
As strip length LOpenWhen being decreased to less than or be equal to X+Y, continuous annealing unit starts according to decel slope automatically
Reduction of speed is shut down so that break point is just to be preset in the throwing tail point at length X.Continuous annealing unit entrance is cut at this
Place cuts off strip steel, and uncoiler is laid down the residual strip comprising " virtual sleeve ", so far completed a steel
The production procedure of volume.
Above result of the test shows, the present embodiment control method can not only avoid mill star-up to divide rouleau, subtract
The technical operation flow such as few sleeve use, and be capable of continuous annealing unit uncoiler strip length and calculate, really
Protect the normal production not affecting continuous annealing unit.Mill star-up regardless of rouleau can effectively reduce production ton steel cost and
Cold rolling useless fall, improves the efficiency of two units.
On-the-spot ruuning situation shows, the present embodiment control method has the highest safety and reliability, permissible
Ensure the continuous production capacity of unit, there is the highest promotional value.
In addition to the implementation, the present invention can also have other embodiments.All employing equivalents or equivalence
The technical scheme that conversion is formed, all falls within the protection domain of application claims.
Claims (8)
1. tandem mills starts the control method regardless of rouleau, it is characterized in that, comprises the following steps:
The first step, tandem mills start, start rolled band steel, and coiling machine starts to batch outlet strip steel；Institute
State coiling machine and be positioned at tandem mills exit；Go to second step；
Second step, continue to monitor outlet strip steel actual (real) thickness；When actual (real) thickness is positioned in the range of preset thickness,
Go to the 3rd step；
3rd step, according to outlet strip steel linear velocity V of current time and coiling machine motor rotary speed N, calculate and work as
The coil of strip coil diameter of front moment coiling machine coiling, and using this coil diameter as " virtual sleeve " coil diameter D0；Go to
4th step；
4th step, after strip steel all rolls, the coil of strip on coiler mandrel is sent to next procedure
The uncoiler of unit, and coil of strip actual information is sent to next procedure unit；Uncoiler is positioned at next procedure
The porch of unit；Described coil of strip actual information includes: belt steel thickness h, coil of strip outer diameter D and " virtual
Sleeve " coil diameter D0；Go to the 5th step；
5th step, described next procedure unit start to produce, uncoiler uncoiling simultaneously；Coil of strip outer diameter D is with life
The product time increases and gradually decreases；Described next procedure unit according to belt steel thickness h, coil of strip outer diameter D and
" virtual sleeve " coil diameter D0Calculate uncoiler coil of strip length L in real timeOpen；LOpenReduce with D and reduce, work as LOpenWhen being down in the range of preset length, described next procedure unit speed reducing stopping, carry out throwing tail operation, excision
Residual strip containing " virtual sleeve "；Control terminates.
The most according to claim 1, tandem mills starts the control method regardless of rouleau, it is characterized in that,
In 3rd step, described " virtual sleeve " coil diameter
The most according to claim 2, tandem mills starts the control method regardless of rouleau, it is characterized in that,
D0The unit that the unit that unit is mm, N is rpm, V be mpm.
The most according to claim 1, tandem mills starts the control method regardless of rouleau, it is characterized in that,
In 5th step, described uncoiler coil of strip length
The most according to claim 4, tandem mills starts the control method regardless of rouleau, it is characterized in that,
LOpenThe unit that the unit that unit is m, h is mm, D be mm, D0Unit be mm.
6. start the control method regardless of rouleau according to tandem mills described in any one of claim 1 to 5,
It is characterized in that, in the 5th step, described preset length scope is that predetermined process throws tail length X and next procedure machine
Group braking distance Y sum.
7. start the control method regardless of rouleau according to tandem mills described in any one of claim 1 to 5,
It is characterized in that, in second step, use the calibrator monitoring outlet strip steel being positioned at tandem mills exit actual
Thickness；In 3rd step, use the laser velocimeter monitoring outlet strip steel linear speed being positioned at tandem mills exit
Degree V, uses coiling machine motor encoder monitoring coiling machine motor rotary speed N.
8. start the controlling party regardless of rouleau according to the tandem mills described in any one of claim 1 to 5
Method, is characterized in that, in the 4th step, described coil of strip actual information also includes: coil of strip number, coil of strip weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410048854.7A CN104826873B (en) | 2014-02-12 | 2014-02-12 | Tandem mills starts the control method regardless of rouleau |
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| CN201410048854.7A CN104826873B (en) | 2014-02-12 | 2014-02-12 | Tandem mills starts the control method regardless of rouleau |
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| CN104826873B true CN104826873B (en) | 2016-09-14 |
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| CN110639956B (en) * | 2018-06-27 | 2021-02-05 | 上海梅山钢铁股份有限公司 | Method for preventing strip entrance from escaping in strip steel tail throwing process |
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| US4998427A (en) * | 1989-11-29 | 1991-03-12 | Aeg Westinghouse Industrial Automation Corporation | Method for rolling on-gauge head and tail ends of a workpiece |
| JPH11267703A (en) * | 1998-03-18 | 1999-10-05 | Sumitomo Metal Ind Ltd | Method for continuously cold-rolling small-diameter wire |
| JP2007160395A (en) * | 2005-12-16 | 2007-06-28 | Nippon Steel Corp | Cold tandem rolling method of high-tensile steel |
| CN100551566C (en) * | 2006-03-06 | 2009-10-21 | 上海宝信软件股份有限公司 | Automatic ribbon lap method of cold rolling serial production |
| CN101862751B (en) * | 2010-05-18 | 2012-11-21 | 上海六晶金属科技有限公司 | Cold rolling method for tungsten-copper alloy sheet |
| CN102179424B (en) * | 2011-03-03 | 2012-12-05 | 山西太钢不锈钢股份有限公司 | Flattening production process of stainless steel |
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