CN109277414A - Control method for rolling for hot-tandem unit - Google Patents
Control method for rolling for hot-tandem unit Download PDFInfo
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- CN109277414A CN109277414A CN201811248117.6A CN201811248117A CN109277414A CN 109277414 A CN109277414 A CN 109277414A CN 201811248117 A CN201811248117 A CN 201811248117A CN 109277414 A CN109277414 A CN 109277414A
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- strip
- rolling
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- steel
- steel grade
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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
- B21B37/48—Tension control; Compression control
-
- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The present invention provides a kind of control method for rolling for hot-tandem unit, comprising: the determination strip steel grade to be rolled；Judge whether steel grade is specific steel grade, if it is specific steel grade, then for the head of strip, middle part and tail portion, using the rolling of each milling train in segmentation pressure coefficient control mm finishing mill unit；If not specific steel grade, then for the head of strip, middle part and tail portion, using the rolling of each milling train in normal pressures coefficient control mm finishing mill unit.
Description
Technical field
The present invention relates to the finish rolling automation fields of hot-continuous-rolling strip steel rolling line, and in particular to one kind is used for hot continuous rolling finish rolling
The control method of the rolling of unit.
Background technique
Currently, rolling is wide in variety, and strip intensity difference is big in large-scale hot rolling enterprise.In the strip of certain specific steel grades
The difference of rolling load of strip hot rolling caused by head up to 15% or more, and the equipment such as mm finishing mill unit mill housing gap exist for a long time
Operation can change under high temperature.These can all lead to rack rolling pressure during strip steel head establishes tension or tail portion is lost and opened
Fluctuation, and then lead to loop remarkable action.This not only easily causes the quality of steel scrap, influence of rolled product, can also damage hydraulic
Pipeline and mechanical equipment, consequence are very serious.For the equipment built well in hot rolling enterprise, this is solved from equipment and is asked
It inscribes unrealistic.
In view of the deficiencies of the prior art, there is an urgent need to one kind to be able to solve because draught pressure fluctuation causes loop to act
The control method for rolling of abnormal problem.
Summary of the invention
Goal of the invention of the invention is in view of the drawbacks of the prior art, to provide a kind of rolling for hot-tandem unit
Control method processed, for solving the problems, such as in the prior art because draught pressure fluctuation causes loop remarkable action.
The present invention provides a kind of control method for rolling for hot-tandem unit, comprising:
The determination strip steel grade to be rolled；
Judge whether steel grade is specific steel grade, if it is specific steel grade, then for the head of strip, middle part and tail portion, is adopted
With the rolling of each milling train in segmentation pressure coefficient control mm finishing mill unit；If not specific steel grade, then for the head of strip,
Middle part and tail portion, using the rolling of each milling train in normal pressures coefficient control mm finishing mill unit.
Provided by the present invention for the control method for rolling of hot-tandem unit, avoid because draught pressure fluctuation causes
Loop remarkable action, reduce the Rolling failure in finishing stands and equipment fault, reduce equipment investment.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 shows the process signal of the control method for rolling according to an embodiment of the present invention for hot-tandem unit
Figure；And
Fig. 2 shows computer system block diagrams according to an embodiment of the present invention.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
Fig. 1 shows the process of the control method for rolling according to an embodiment of the invention for hot-tandem unit
Schematic diagram, as shown in Figure 1, method includes the following steps:
Step S110, the determination strip steel grade to be rolled.
The control method for rolling for hot-tandem unit of the embodiment of the present invention is controlled based on automatic thickness
(Automatic Gauge Control, AGC) is come what is realized.
Specifically, level two computer determines the strip steel grade to be rolled and specification according to rolling scaduled and setting model,
And the determining strip steel grade to be rolled and specification are sent to primary computer, as shown in Figure 2.
Step S120 judges whether steel grade is that specific steel grade if it is specific steel grade thens follow the steps S121, for band
Head, middle part and the tail portion of steel control the rolling of each milling train in mm finishing mill unit using segmentation pressure coefficient；If not specific
Steel grade thens follow the steps S122, and the head, middle part and tail portion of strip are controlled in mm finishing mill unit often using normal pressures coefficient
The rolling of a milling train.Logic switch for Discrete control be according to the on-off of the load relay of each milling train and
Flying shear back-end crop completes signal to realize.
Primary computer determines what this to be rolled according to the strip steel grade to be rolled that the level two computer received issues
Whether strip steel grade is specific steel grade.Wherein, specific steel grade mainly includes nickel and stainless steel and high-strength steel class etc..The rule of nickel and stainless steel
Lattice are usually that thickness is not more than 3.0mm, width not less than 1200mm, and the specification of high-strength steel is usually thickness no more than 2.0mm, width
Degree is not less than 1100mm.
If the strip steel grade to be rolled is not specific steel grade, for the head, middle part and tail portion of strip, then using conventional
Pressure coefficient controls the rolling of each milling train in mm finishing mill unit, and pressure coefficient keeps AGC normal pressures coefficient (that is, hereinafter
The K of description1It is set to 1).Wherein, strip steel head is that rack stings 1-2 meters of strip length after steel, and tail part of band steel is strip tail
To the length of corresponding rack after the completion of portion's shearing, strip middle part is the part other than its head and its tail portion of strip.
If the strip steel grade to be rolled be specific steel grade, for strip head, middle part and tail portion if using segmentation pressure
Force coefficient controls the rolling of each milling train in mm finishing mill unit.Rolling for the head of strip, middle part and tail portion, in order to be segmented control
Each milling train in mm finishing mill unit processed, need to head, middle part and tail portion setting stepwise to strip be used for the Bounce distance of each milling train
Pressure coefficient, the wherein calculation formula of Bounce distance are as follows:
S=(P × K × K1/KG)-S0
Wherein, S0For the corresponding Bounce distance of zeroing roll-force, unit of account is millimeter；
KGFor stiffness coefficient equivalent, unit of account is thousand Ns/millimeter；
K is preset AGC normal pressures coefficient,；
K1To be segmented pressure coefficient, 0≤K1≤1；
P is practical draught pressure, and unit of account is thousand Ns；
S is Bounce distance, and unit of account is millimeter.
In an embodiment of the present invention, the head of the strip (hereinafter referred to as specific strip) of specific steel grade is used according to spy
Determine the draught pressure deviation △ P setting head pressure COEFFICIENT K of steel grade1The method of value, wherein △ P is that draught pressure deviation is absolute
Value: △ P=∣ sets the practical Zha Ya Li ∣ of draught pressure-, and draught pressure unit is ton；The tail portion of specific strip is then according to the spy
The steel grade specification of strip is determined to set the segmentation pressure coefficient K of the tail portion of the specific strip1；The segmentation pressure at the middle part of specific strip
Force coefficient then keeps AGC normal pressures coefficient, that is, segmentation pressure coefficient K1It is set to 1.
In embodiments of the present invention, segmentation pressure coefficient K is used to the head, middle part and tail portion of the strip of specific steel grade1
When, it is segmented pressure coefficient K1Value principle are as follows: for the strip steel head of each milling train, draught pressure deviation △ P is bigger, use
Segmentation pressure coefficient K in the head of the strip of the specific steel grade1It is smaller；For the tail part of band steel of each milling train, the particular steel
The steel strip thickness of kind is smaller, width is bigger, then the tail for strip of the first leading portion milling train of the rolling sequence in mm finishing mill unit
The segmentation pressure coefficient in portion is smaller and the segmentation pressure coefficient for tail part of band steel of the posterior back segment milling train of rolling sequence is wanted
Greater than leading portion milling train.
In order to more clearly state the control method for rolling for hot-tandem unit of the embodiment of the present invention, below
Show example one and example two.In this example, it will be assumed that the head of the strip of specific steel grade is segmented pressure coefficient K1Take
Value can be as shown in table 1, and the tail portion of the strip of the specific steel grade based on steel grade specification is segmented pressure coefficient K1Value can be such as 2 institute of table
Show.
Table 1
| Rack serial number | The K of the ton hour of △ P≤3001 | The K of the 300 < △ ton hours of P≤5001 | The K of 500 ton hour of △ P >1 |
| F1-F2 | 1 | 1 | 0.2~0.4 |
| F3 | 1 | 0.2~0.3 | 0.1~0.2 |
| F4-F6 | 1 | 0.1~0.2 | 0.1~0.2 |
Table 2
| Rack serial number | K1 |
| F1-F2 | 0.4~0.6 |
| F3-F4 | 0.6~0.85 |
| F5-F6 | 0.9~1 |
Example one
The strip for the steel grade to be rolled be nickel and stainless steel strip, strip having a size of thickness 3.0mm, width 1250mm, F1,
The practical draught pressure and strip steel head for setting draught pressure, strip steel head of the strip steel head of F2, F3, F4, F5, F6 rack
Draught pressure deviation it is as shown in table 3.
Table 3
In conjunction with the value principle of above-mentioned segmentation pressure coefficient, the draught pressure deviation of the strip steel head of table 3 and table 1
The head of the strip of specific steel grade is segmented pressure coefficient K1Value, it is known that the head of F1 rack is segmented pressure coefficient K1It can be set
It is set to the head segmentation pressure coefficient K of 1, F3 rack1It is set to 0.3, the head of F2, F4, F5 and F4 rack is segmented pressure system
Number K11 can be set to；As nickel and stainless steel be the embodiment of the present invention required by specific steel grade specification, can be used
The tail portion of the strip of specific steel grade in table 2 based on steel grade specification is segmented pressure coefficient K1Value, in conjunction with above-mentioned segmentation pressure
The tail portion of the value principle of force coefficient and according to table 2, F1-F2 rack is segmented pressure coefficient K1It can be set to 0.6, F3-
The tail portion of F4 rack is segmented pressure coefficient K1It can be set to the tail portion segmentation pressure coefficient K of 0.8, F5-F6 rack1It can be set
It is 1；Pressure coefficient K is then segmented for the middle part of the strip1It can be set to 1.
Segmentation pressure of the value principle according to an embodiment of the present invention to the head of the strip of the nickel and stainless steel, middle part and tail portion
After the completion of force coefficient determines, the rolling of each rack is controlled using the segmentation pressure coefficient after determination, is efficiently avoided
The head and tail portion of strip are unstable because draught pressure fluctuates bring when rolling the strip of the specific steel grade.
Example two
The steel grade to be rolled be automobile steel (high-strength steel), strip having a size of thickness 2.0mm, width 1100mm, F1, F2,
The practical draught pressure and strip steel head of the setting draught pressure of the strip steel head of F3, F4, F5, F6 rack, strip steel head
Draught pressure deviation is as shown in table 4.
Table 4
In conjunction with the strip of the specific steel grade of the value principle of above-mentioned segmentation pressure coefficient, draught pressure deviation and table 1
Head be segmented pressure coefficient K1Value, it is known that the head of F1 rack is segmented pressure coefficient K1It can be set to 0.4, Qi Taji
The head of frame is segmented pressure coefficient K1It can be set to 1；Since automobile TQ550MCD is specific required by the embodiment of the present invention
Steel grade specification, therefore the tail portion segmentation pressure coefficient K of the strip of specific steel grade in table 2 based on steel grade specification can be used1's
Value, in conjunction with above-mentioned segmentation pressure coefficient value principle and according to table 2, the tail portion of F1-F2 rack is segmented pressure coefficient
K1It can be set to the tail portion segmentation pressure coefficient K of 0.5, F3 rack1It can be set to the tail portion segmentation pressure system of 0.6, F4 rack
Number is that the tail portion of 0.85, F5-F6 rack is segmented pressure coefficient K1It can be set to 0.9；For automobile TQ550MCD strip
Middle part then uses AGC normal pressures coefficient, i.e. segmentation pressure coefficient K1It can be set to 1.
Segmentation pressure of the value principle according to an embodiment of the present invention to the head of the strip for automobile, middle part and tail portion
After the completion of coefficient determines, the rolling of each rack is controlled using determining segmentation pressure coefficient, efficiently avoids rolling
It is unstable that the head of strip when making the strip of the specific steel grade and tail portion draught pressure fluctuate bring.
Control method for rolling according to an embodiment of the present invention for hot-tandem unit, solves in finishing stands
The unusual fluctuations problem of draught pressure, it is ensured that the movement of pressure system and loop is normal, reduces finish rolling Rolling failure and sets
Standby failure, has effectively saved equipment investment；Meanwhile the roll control side for hot-tandem unit of the embodiment of the present invention
Method also reduces the production probability of steel scrap, ensure that product thickness qualification rate, and considerable economic effect is brought to hot rolling enterprise
Benefit.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.Especially, as long as there is no knots
Structure conflict, items technical characteristic mentioned in the various embodiments can be combined in any way.The present invention does not limit to
In specific embodiment disclosed herein, but include all technical solutions falling within the scope of the claims.
Claims (10)
1. a kind of control method for rolling for hot-tandem unit, comprising:
The determination strip steel grade to be rolled；
Judge whether the strip steel grade is specific steel grade, if it is specific steel grade, then for the head of strip, middle part and tail
Portion, using the rolling of each milling train in segmentation pressure coefficient control mm finishing mill unit；If not specific steel grade, then for strip
Head, middle part and tail portion, using the rolling of each milling train in normal pressures coefficient control mm finishing mill unit.
2. according to the method described in claim 1, wherein, for the head, middle part and tail portion of strip, then using segmentation pressure system
The rollings of each milling train include: in number control mm finishing mill units
Segmentation pressure coefficient for the head of strip, middle part and tail portion setting stepwise for the Bounce distance of each milling train, with control
Make the rolling for the head of strip, middle part and tail portion.
3. according to the method described in claim 2, wherein, the calculating formula of the Bounce distance are as follows:
S=(P × K × K1/KG)-S0
Wherein, S0For the corresponding Bounce distance of zeroing roll-force, unit of account is millimeter；
KGFor stiffness coefficient equivalent, unit of account is thousand Ns/millimeter；
K is preset AGC normal pressures coefficient,；
K1To be segmented pressure coefficient, 0≤K1≤1；
P is practical draught pressure, and unit of account is thousand Ns；
S is Bounce distance, and unit of account is millimeter.
4. according to the method described in claim 3, wherein, being used for the strip steel head according to draught pressure deviation △ P setting
Segmentation pressure coefficient,
Wherein △ P=∣ sets the practical Zha Ya Li ∣ of draught pressure-；
The segmentation pressure coefficient of the tail part of band steel is used for according to steel grade setting；
1 is set to for the segmentation pressure coefficient in the middle part of the strip.
5. according to the method described in claim 4, wherein, the draught pressure deviation △ P is bigger, the head for the strip
The segmentation pressure coefficient in portion is smaller.
6. method described in any one in -5 according to claim 1, which is characterized in that the steel strip thickness of the specific steel grade
It is smaller, width is bigger, then the segmentation pressure system for tail part of band steel of the first leading portion milling train of the rolling sequence in mm finishing mill unit
The segmentation pressure coefficient for tail part of band steel of the number posterior back segment milling train of smaller and rolling sequence is greater than leading portion milling train.
7. method described in any one in -5 according to claim 1, wherein determine institute according to rolling scaduled and setting model
State steel grade.
8. method described in any one in -5 according to claim 1, wherein the specific steel grade includes nickel and stainless steel and height
Qiang Gang.
9. according to the method described in claim 7, wherein, the thickness of the nickel and stainless steel is not less than no more than 3.0mm, width
The thickness of 1200mm, the high-strength steel are not less than 1100mm no more than 2.0mm, width.
10. method described in any one in -5 according to claim 1, wherein the head is that rack stings the strip after steel
1 meter -2 meters of length；The tail portion is tail part of band steel shearing after the completion to the length of corresponding rack；The middle part be strip in addition to
Part except the head and the tail portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811248117.6A CN109277414B (en) | 2018-10-25 | 2018-10-25 | Rolling control method for hot continuous rolling finishing mill group |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811248117.6A CN109277414B (en) | 2018-10-25 | 2018-10-25 | Rolling control method for hot continuous rolling finishing mill group |
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| Publication Number | Publication Date |
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| CN109277414A true CN109277414A (en) | 2019-01-29 |
| CN109277414B CN109277414B (en) | 2020-11-03 |
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Citations (7)
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|---|---|---|---|---|
| US3610005A (en) * | 1969-05-27 | 1971-10-05 | Westinghouse Electric Corp | Roll positioning system calibration method and apparatus |
| JP2002346613A (en) * | 2001-05-28 | 2002-12-03 | Nippon Steel Corp | Composite roll for hot rolling and hot rolling method using the same |
| CN101036922A (en) * | 2007-04-17 | 2007-09-19 | 山西太钢不锈钢股份有限公司 | Control method of special hot rolled sheet to plus pressure |
| CN102172637A (en) * | 2010-12-17 | 2011-09-07 | 中冶南方工程技术有限公司 | High-accuracy automatic thickness control method and equipment based on thickness gauge subsection monitoring |
| CN103506405A (en) * | 2013-09-26 | 2014-01-15 | 山西太钢不锈钢股份有限公司 | Method for compensating finish rolling gap during mixed stainless steel rolling |
| JP2014014838A (en) * | 2012-07-09 | 2014-01-30 | Nippon Steel & Sumitomo Metal | Method and apparatus for producing hot-rolled steel sheet |
| CN104209344A (en) * | 2014-09-03 | 2014-12-17 | 山西太钢不锈钢股份有限公司 | Dynamic self-adapting press control method of hot continuous rolling special steel |
-
2018
- 2018-10-25 CN CN201811248117.6A patent/CN109277414B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3610005A (en) * | 1969-05-27 | 1971-10-05 | Westinghouse Electric Corp | Roll positioning system calibration method and apparatus |
| JP2002346613A (en) * | 2001-05-28 | 2002-12-03 | Nippon Steel Corp | Composite roll for hot rolling and hot rolling method using the same |
| CN101036922A (en) * | 2007-04-17 | 2007-09-19 | 山西太钢不锈钢股份有限公司 | Control method of special hot rolled sheet to plus pressure |
| CN102172637A (en) * | 2010-12-17 | 2011-09-07 | 中冶南方工程技术有限公司 | High-accuracy automatic thickness control method and equipment based on thickness gauge subsection monitoring |
| JP2014014838A (en) * | 2012-07-09 | 2014-01-30 | Nippon Steel & Sumitomo Metal | Method and apparatus for producing hot-rolled steel sheet |
| CN103506405A (en) * | 2013-09-26 | 2014-01-15 | 山西太钢不锈钢股份有限公司 | Method for compensating finish rolling gap during mixed stainless steel rolling |
| CN104209344A (en) * | 2014-09-03 | 2014-12-17 | 山西太钢不锈钢股份有限公司 | Dynamic self-adapting press control method of hot continuous rolling special steel |
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| CN109277414B (en) | 2020-11-03 |
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