CN106984652B - The method for controlling finishing stand sideslip according to breakdown bar camber - Google Patents
The method for controlling finishing stand sideslip according to breakdown bar camber Download PDFInfo
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- CN106984652B CN106984652B CN201610041263.6A CN201610041263A CN106984652B CN 106984652 B CN106984652 B CN 106984652B CN 201610041263 A CN201610041263 A CN 201610041263A CN 106984652 B CN106984652 B CN 106984652B
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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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
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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
- B21B37/58—Roll-force control; Roll-gap control
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Abstract
The invention discloses a kind of methods controlling finishing stand sideslip according to breakdown bar camber, including step：(1) control range is selected；(2) camber C values are determined；(3) the unilateral adjustment amount of roll gap Δ Gap of the i-th rack is obtained according to following modelsi：In formula：ΔGapiFor the unilateral adjustment amount of roll gap of the i-th rack, unit mm；C indicates strip camber C values (mm)；KmIndicate mill modulus, unit KN/mm；KsIndicate plastic deformation coefficient, unit KN/mm；hiIndicate the exit thickness of the i-th rack, unit mm；h0Indicate workpiece thickness, unit mm；W indicates strip finished width, unit mm；KiThe gain coefficient for indicating the i-th rack is dimensionless；(4) by the unilateral adjustment amount of roll gap Δ Gap of the i-th rack of above-mentioned determinationiPress control system is transferred to be executed.The method of the present invention, which can eliminate breakdown bar camber, influences the sideslip of finish rolling.
Description
Technical field
The present invention relates to a kind of method of control rolling-mill housing sideslip more particularly to a kind of sides of control finishing stand sideslip
Method.
Background technology
Hot-strip is important steel products, and hot continuous rolling is one of the major way of hot-strip production.Fig. 1 is illustrated
A kind of hot continuous rolling production line of hot-strip.As shown in Figure 1, the hot continuous rolling production line includes heating furnace 1, roughing mill 2, finishing mill
3, cooling facility for laminar flow 4 and coiling machine 5, wherein finishing mill 3 include several finishing stands, in the hot continuous rolling production line, finish rolling
Machine 3 includes finishing stand F1-F7.The production technology of the hot continuous rolling production line is：Heated 1 heating of plate blank of stove of blank first,
It is secondary through high pressure water dephosphorization, after through roughing mill 2 carry out roughing, then cutting head cutting tail, then through 3 finish rolling of finishing mill, after through laminar flow
Cooling device 4 carries out section cooling, is finally carried out batching acquisition hot-strip finished product by coiling machine 5.
Slab after roughing is also referred to as intermediate base.In the production of practical hot-strip, due to non-uniform temperature, two side roller of roughing
Stitch deviation, the reasons such as breaking-down roll skids, intermediate base often has certain camber as shown in Figure 2 (i.e. shape such as reaping hook
Bending), follow-up finish rolling rolling stability is adversely affected, finish rolling is easy to cause and occurs rolling brokenly the even things such as sideslip steel scrap
Therefore.However at present to this effective control means of shortage, operative employee needs to be done in time according to practical rolling situation in production
In advance, there is larger uncertainty and error.With the increasingly increasing of high-strength hot-rolled strip product and thin, hard specification product
More, the problems such as hot rolling camber, sideslip, becomes increasingly conspicuous, and becomes one of hot rolling production focal issue.
Camber problem is derived from Asymmetric Rolling, i.e. inlet of rolling mill and outlet slab ratio wedge shape is unequal.It is non-right to cause
Claim the factor of rolling numerous, mainly including rolled piece, milling train and rolling to neutral tripartite face.Factor in terms of rolled piece includes slab
Camber, wedge shape degree and the temperature uniformity of material.Asymmetric Rolling problem caused by temperature uniformity for slab supplied materials, specially
Sharp JP62197209A, JP06007818A disclose a kind of camber based on temperature detection and camber control method, are to pass through
Temperature-detecting device is installed in inlet of rolling mill, measures slab horizontal temperature difference, thus obtains milling train both sides rolling force deviation and roller
Deviation is stitched, and milling train both sides roll gap is compensated, to realize camber and camber control.But this method is for slab supplied materials
Camber and wedge shape degree caused by sideslip and camber be unable to control.Patent JP62054511A discloses a kind of view-based access control model
The camber control method of detection exports installation high speed camera by milling train, detects strip position in real time, and sideslip information
Down-pressing system of rolling mill is passed to, dynamic adjusts the pressure of milling train both sides, to realize camber and camber control.This method can solve
Sideslip caused by various factors and camber problem, but need to be mounted so that slab position detection and automatic Serve System,
It is big to implement investment, the period is long.
Invention content
The purpose of the present invention is to provide a kind of method controlling finishing stand sideslip according to breakdown bar camber, this method
It can solve the problems, such as, since base influences finish rolling rolling stability there are camber among roughing, to reduce sideslip steel scrap, improve heat
Roll belt steel product strip shape quality.
To achieve the goals above, the present invention proposes a kind of side controlling finishing stand sideslip according to breakdown bar camber
Method, including step：
(1) control range is selected：The control range be along intermediate base length direction away from the head end of intermediate base away from
From the control section for X；
(2) camber C values are determined：With intermediate base in its longitudinal direction away from head end distance for X position to intermediate value
On the basis of C1, the reality of each point in the control range is subtracted into C1 to intermediate value C2, obtains the camber C values of each point, C
Unit be mm；
(3) the unilateral adjustment amount of roll gap Δ Gap of the i-th rack is obtained according to following modelsi：
In formula：ΔGapiFor the unilateral adjustment amount of roll gap of the i-th rack, unit mm；C indicates strip camber C values (mm)；
KmIndicate mill modulus, unit KN/mm；KsIndicate plastic deformation coefficient, unit KN/mm；hiIndicate the i-th machine
The exit thickness of frame, unit mm；h0Indicate workpiece thickness, unit mm；W indicates strip finished width, unit
For mm；KiThe gain coefficient for indicating the i-th rack is dimensionless；
(4) by the unilateral adjustment amount of roll gap Δ Gap of the i-th rack of above-mentioned determinationiPress control system is transferred to be held
Row.
The present general inventive concept, which allows for breakdown bar camber, influences the sideslip of finish rolling, using before finish rolling to centre
Base camber centering data are detected, and the breakdown bar camber centering data obtained based on the detection calculate each finishing mill
The unilateral adjustment amount of roll gap of planishing roll in frame, then roll gap adjustment is carried out according to the unilateral side adjustment amount of roll gap by press control system
Method, realize compensative level, the sideslip of finish rolling influenced with eliminating breakdown bar camber, to solve due to base among roughing
There are problems that camber and influence finish rolling rolling stability, reduce sideslip steel scrap, improves hot-strip product strip shape quality.
In the method for controlling finishing stand sideslip according to breakdown bar camber of the present invention, step (1) selectes control range
The reason of be that typically in intermediate base both ends camber it is obvious, in step (2) as the described to intermediate value of centering data
C1 and C2 usually is detected to obtain by width instrument, and the model in step (3) is for calculating the planishing roll of the i-th rack in finishing stand
Unilateral adjustment amount of roll gap Δ Gapi, the press control system in step (4) is for executing roll gap adjustment.
The method for controlling finishing stand sideslip according to breakdown bar camber of the present invention can be matched by industrial control computer
The press control system for closing width instrument and finishing stand realizes that wherein width instrument is used to detect breakdown bar camber centering data,
Calculating and transmission and Row control of the industrial control computer for model, related data in construction step (3), finishing mill
The press control system of frame is for executing roll gap adjustment.
Further, in method of the present invention, also there is step (2a) after the step (2)：By the sickle of each point
The amplitude in the curved positive/negative direction of C values of knife is compared with the C value amplitude thresholds of a setting, if the amplitude in the positive/negative direction of C values is small
In equal to the C values amplitude thresholds, then step (3) is carried out, if the amplitude in the positive/negative direction of C values is more than the C values amplitude threshold
Value, then using the C values amplitude thresholds as the amplitude in the positive/negative direction of C values to carry out step (3).Wherein, the C values amplitude threshold
Value is empirically chosen.
Further, in method of the present invention, also there is step (3a) after the step (3)：By the i-th rack
Unilateral adjustment amount of roll gap Δ GapiThe amplitude in positive/negative direction is compared with the regulated quantity amplitude thresholds of a setting, if the i-th machine
The unilateral adjustment amount of roll gap Δ Gap of frameiThe amplitude in positive/negative direction is less than or equal to the regulated quantity amplitude thresholds, then carries out step
(4), if the unilateral adjustment amount of roll gap Δ Gap of the i-th rackiThe amplitude in positive/negative direction is more than the regulated quantity amplitude thresholds, then
Using the regulated quantity amplitude thresholds as the unilateral adjustment amount of roll gap Δ Gap of the i-th rackiThe amplitude in positive/negative direction is to be walked
Suddenly (4).Wherein, the regulated quantity amplitude thresholds are empirically chosen.
Further, in method of the present invention or above-mentioned, in the step (1), the value range of X is 0.5-
30m。
Further, in the above-mentioned methods, the value range of X is 5-15m.
In said program, the value range of the X should include at least apparent breakdown bar camber, preferable to reach
The effect eliminated breakdown bar camber and the sideslip of finish rolling is influenced.
Further, in method of the present invention or above-mentioned, for F1-F4 racks, KmValue range be
6000-6800KN/mm；For F5-F7 racks, KmValue range be 5600-6400KN/mm.
Further, in method of the present invention or above-mentioned, KsValue range be 1000-40000KN/mm.
Further, in method of the present invention or above-mentioned, hiValue range be 1.2-30mm.
In said program, Km、KsAnd hiFor the parameter of finishing stand, in some embodiments, finishing stand includes
Seven racks of F1-F7.
Further, in method of the present invention or above-mentioned, h0Value range 30-60mm.
Further, in method of the present invention or above-mentioned, the value range 700-1800mm of W.
The method of the present invention for controlling finishing stand sideslip according to breakdown bar camber, has compared with prior art
It has the advantage that：
(1) sideslip and camber caused by the camber and wedge shape degree by slab supplied materials are can control, finish rolling race is effectively reduced
Partially, whipping and steel scrap are rolled brokenly, hot rolling stability is improved；
(2) due to the method for the present invention to the detection of intermediate base with to roll gap adjusting control be not it is synchronous implement, it is right
The synchronism and requirement of real-time detected and controlled be not high, detects and controls the of low cost of equipment；
(3) even if high synchronism is also impossible to fully synchronized again, control effect is unable to reach most preferably, and the method for the present invention
Detect and control asynchronous ensure that best control effect.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the hot continuous rolling production line of hot-strip.
Fig. 2 is camber schematic diagram.
Fig. 3 is the method for the present invention according to breakdown bar camber control finishing stand sideslip in a kind of embodiment
Lower applied control system schematic diagram.
Fig. 4 is the method for the present invention according to breakdown bar camber control finishing stand sideslip in a kind of embodiment
Under flow diagram.
Fig. 5 is the method for the present invention according to breakdown bar camber control finishing stand sideslip in a kind of embodiment
Under intermediate base centering data and curves.
Specific implementation mode
It is controlled according to breakdown bar camber of the present invention below in conjunction with Figure of description and specific embodiment
The method of finishing stand sideslip makes further explanation explanation, but the explanation does not constitute the technical side to the present invention
The improper restriction of case.
Embodiment A1-A2
The method for controlling finishing stand sideslip according to breakdown bar camber that Fig. 3 illustrates embodiment A1-A2 is applied
Control system, Fig. 4 illustrate the flow of the method that finishing stand sideslip is controlled according to breakdown bar camber of embodiment A1-A2.
As shown in figure 3, what the method for controlling finishing stand sideslip according to breakdown bar camber of embodiment A1-A2 was applied
Control system includes width instrument 7 and industrial control computer 8, width instrument 7 and finishing stand with industrial control computer 8
The press control system of F1-F7 is realized.
As shown in figure 4, combining with reference to figure 3, embodiment A1-A2's controls finishing stand sideslip according to breakdown bar camber
Method is as follows：
(1) intermediate base centering data processing (selected control range)：The intermediate base reaping hook of intermediate base 6 is detected by width instrument 7
Curved centering data, industrial control computer 8 handles the breakdown bar camber centering data, according to preset rule
Select control range, the control range be X away from the distance of the head end of intermediate base along the length direction of intermediate base control section；
Above-mentioned preset rule should so that the value range of X includes apparent breakdown bar camber, the preset rule
Can be that the size based on centering data absolute value judges, or empirically sets；The present embodiment X value ranges select 5-
15m；
(2) camber C values are determined：Industrial control computer 8 is in its longitudinal direction away from head end distance with intermediate base 6
The position of X to intermediate value C1 on the basis of, the reality of each point in control range is subtracted into C1 to intermediate value C2, obtains the reaping hook of each point
The unit of curved C values, C is mm；
(2a) C value amplitude limits：Industrial control computer 8 sets the amplitude in the positive/negative direction of camber C values of each point with one
C value amplitude thresholds are compared, if the amplitude in the positive/negative direction of C values is less than or equal to the C value amplitude thresholds, carry out step
(3), if the amplitude in the positive/negative direction of C values is more than the C value amplitude thresholds, using the C values amplitude thresholds as the positive/negative direction of C values
Amplitude to carry out step (3)；Wherein, C values amplitude thresholds are empirically chosen；
(3) finishing stand F1-F7 leveling correction amounts are calculated：Have in the executable program of industrial control computer 8 and meets
The program module of following models, industrial control computer 8 obtain in finishing stand F1-F7 the i-th rack (i.e. by the program module
Finishing stand Fi) unilateral adjustment amount of roll gap Δ Gapi：
In formula：ΔGapiFor the unilateral adjustment amount of roll gap of the i-th rack, unit mm；C indicates strip camber C values, list
Position is mm (value range -100~100)；KmIndicate that mill modulus, unit are KN/mm (for F1-F4 racks, Km's
Value range is 6000-6800KN/mm；For F5-F7 racks, KmValue range be 5600-6400KN/mm)；KsIndicate modeling
Property deformation coefficient, unit be KN/mm (value range 1000-40000KN/mm)；hiIndicate the exit thickness of the i-th rack,
Its unit is mm (value range 1.2-30mm)；h0Indicate that workpiece thickness, unit are mm (value range 30-60mm)；W
Indicate that strip finished width, unit are mm (value range 700-1800mm)；KiThe gain coefficient for indicating the i-th rack is
Dimensionless (value range is less than 1)；
(3a) regulated quantity amplitude limit：Industrial control computer 8 is by the unilateral adjustment amount of roll gap Δ Gap of the i-th rackiPositive/negative side
To amplitude with one setting regulated quantity amplitude thresholds be compared, if the unilateral adjustment amount of roll gap Δ Gap of the i-th rackiJust/
The amplitude of negative direction is less than or equal to the regulated quantity amplitude thresholds, then step (4) is carried out, if the unilateral roll gap adjustment of the i-th rack
Measure Δ GapiThe amplitude in positive/negative direction is more than the regulated quantity amplitude thresholds, then using the regulated quantity amplitude thresholds as the i-th rack
Unilateral adjustment amount of roll gap Δ GapiThe amplitude in positive/negative direction is to carry out step (4)；Wherein, the regulated quantity amplitude thresholds are according to warp
Test selection；
(4) finishing stand F1-F7 leveling amendments are executed：Industrial control computer 8 is by the unilateral side of the i-th rack of above-mentioned determination
Adjustment amount of roll gap Δ GapiIt is X's that the press control system of finishing stand, which is transferred to, in the distance of the head end apart from intermediate base 6
The execution of the corresponding roll gap adjustments of finishing stand F1-F7 is carried out in range.
The concrete technology that table 1 lists the method for controlling finishing stand sideslip according to breakdown bar camber of embodiment A1 is joined
Number.In embodiment A1, the centering data detected by width instrument are as shown in figure 5, abscissa is the length direction of intermediate base, away from centre
At the head end 2m of base 6 is C2=61.2mm to intermediate value, and at 10 meters of the head end away from intermediate base 6 is C1=to intermediate value
12.5mm, the C values calculated are 48.7mm.
Table 1.
The concrete technology that table 2 lists the method for controlling finishing stand sideslip according to breakdown bar camber of embodiment A2 is joined
Number.In embodiment A2, in the centering data detected by width instrument, at the head end 1m away from intermediate base 6 is C2=to intermediate value
53.6mm, at 10 meters of the head end away from intermediate base 6 is C1=-6.7mm to intermediate value, and the C values calculated are 60.3mm.
Table 2.
Above-described embodiment A1 and A2 only give the calculated case of a C value, for what is obtained according to step (2) and (2a)
Different C values only need to substitute into the unilateral adjustment amount of roll gap Δ Gap that step (3) can calculate the rack F1-F7 of corresponding C valuesi。
Embodiment A1 and A2 have received good result in practical applications, can reduce finish rolling sideslip, roll brokenly whipping and steel scrap, improve heat
Roll rolling stability.
It should be noted that the above list is only specific embodiments of the present invention, it is clear that the present invention is not limited to above real
Example is applied, there are many similar variations therewith.If those skilled in the art directly exported from present disclosure or
All deformations associated, are within the scope of protection of the invention.
Claims (9)
1. a kind of method controlling finishing stand sideslip according to breakdown bar camber, which is characterized in that including step：
(1) control range is selected：It away from the distance of the head end of intermediate base is X that the control range, which is along the length direction of intermediate base,
Control section；
(2) camber C values are determined：To intermediate value C1 it is for the position of X away from head end distance in its longitudinal direction with intermediate base
The reality of each point in the control range is subtracted C1 to intermediate value C2, obtains the camber C values of each point, the list of C by benchmark
Position is mm；
By the amplitude in the positive/negative direction of camber C values of each point with one setting C value amplitude thresholds be compared, if C values just/
The amplitude of negative direction is less than or equal to the C values amplitude thresholds, then step (3) is carried out, if the amplitude in the positive/negative direction of C values is more than
The C values amplitude thresholds, then using the C values amplitude thresholds as the amplitude in the positive/negative direction of C values to carry out step (3)；
(3) the unilateral adjustment amount of roll gap Δ Gap of the i-th rack is obtained according to following modelsi：
In formula：ΔGapiFor the unilateral adjustment amount of roll gap of the i-th rack, unit mm；C indicates strip camber C values (mm)；KmTable
Show mill modulus, unit KN/mm；KsIndicate plastic deformation coefficient, unit KN/mm；hiIndicate the i-th rack
Exit thickness, unit mm；h0Indicate workpiece thickness, unit mm；W indicates strip finished width, unit mm；
KiThe gain coefficient for indicating the i-th rack is dimensionless；
(4) by the unilateral adjustment amount of roll gap Δ Gap of the i-th rack of above-mentioned determinationiPress control system is transferred to be executed.
2. the method as described in claim 1, which is characterized in that also have step (3a) after the step (3)：By the i-th machine
The unilateral adjustment amount of roll gap Δ Gap of frameiThe amplitude in positive/negative direction is compared with the regulated quantity amplitude thresholds of a setting, if
The unilateral adjustment amount of roll gap Δ Gap of i-th rackiThe amplitude in positive/negative direction is less than or equal to the regulated quantity amplitude thresholds, then carries out
Step (4), if the unilateral adjustment amount of roll gap Δ Gap of the i-th rackiThe amplitude in positive/negative direction is more than the regulated quantity amplitude threshold
Value, then using the regulated quantity amplitude thresholds as the unilateral adjustment amount of roll gap Δ Gap of the i-th rackiThe amplitude in positive/negative direction with into
Row step (4).
3. the method as described in claim 1, which is characterized in that in the step (1), the value range of X is 0.5-30m.
4. method as claimed in claim 3, which is characterized in that the value range of X is 5-15m.
5. the method as described in claim 1, which is characterized in that for F1-F4 racks, KmValue range be 6000-
6800KN/mm；For F5-F7 racks, KmValue range be 5600-6400KN/mm.
6. the method as described in claim 1, which is characterized in that KsValue range be 1000-40000KN/mm.
7. the method as described in claim 1, which is characterized in that hiValue range be 1.2-30mm.
8. the method as described in claim 1, which is characterized in that h0Value range 30-60mm.
9. the method as described in claim 1, which is characterized in that the value range 700-1800mm of W.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109570241B (en) * | 2017-09-29 | 2020-08-25 | 宝山钢铁股份有限公司 | Wedge-shaped control method with deviation protection |
| CN112453067B (en) * | 2019-09-09 | 2022-12-09 | 重庆钢铁股份有限公司 | Rough rolling plate shape adjusting method |
| CN111036690A (en) * | 2019-11-14 | 2020-04-21 | 北京科技大学设计研究院有限公司 | Method for controlling deflection of rough rolling intermediate billet |
| CN111014308B (en) * | 2019-12-09 | 2021-08-03 | 北京科技大学设计研究院有限公司 | Early warning method for head deviation of rough rolling intermediate blank in furnace coil rolling line |
| CN111702007B (en) * | 2020-06-24 | 2021-11-30 | 河北工程大学 | Hot rolling finishing mill group strip steel head deviation control method |
| CN111842507B (en) * | 2020-07-10 | 2022-03-18 | 宝钢湛江钢铁有限公司 | Method for realizing deviation control of center line of plate blank |
| CN113953332B (en) * | 2020-07-21 | 2024-07-12 | 宝山钢铁股份有限公司 | Control method for unilateral wave shape of strip steel between hot continuous rolling frames |
| CN112742879B (en) * | 2021-01-04 | 2022-08-19 | 南京钢铁股份有限公司 | Control method for camber of medium plate |
| CN112958633B (en) * | 2021-01-28 | 2022-05-31 | 北京科技大学设计研究院有限公司 | Incoming material camber-based fine rolling strip steel head pre-swing leveling control method |
| CN113680829B (en) * | 2021-08-20 | 2023-05-12 | 鞍钢集团自动化有限公司 | Novel sickle elbow pre-control method |
| CN114160586B (en) * | 2021-12-02 | 2024-10-08 | 唐山学院 | Compensation method for rolling center line deviation of hot-rolled medium plate |
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| JPS6192714A (en) * | 1984-10-12 | 1986-05-10 | Kawasaki Steel Corp | Camber control method in thick plate rolling |
| JPS6289509A (en) * | 1985-10-16 | 1987-04-24 | Mitsubishi Heavy Ind Ltd | Meandering and camber control method |
| JPS6380908A (en) * | 1986-09-22 | 1988-04-11 | Kobe Steel Ltd | Meandering and camber control method for rolled stock |
| JPS6448613A (en) * | 1987-08-20 | 1989-02-23 | Nippon Steel Corp | Camber control method for cold rolling |
| CN100547345C (en) * | 2006-09-26 | 2009-10-07 | 宝山钢铁股份有限公司 | A kind of method of on-line measurement sickle curve of plate blank |
| CN101934292B (en) * | 2010-08-31 | 2012-07-04 | 江苏省沙钢钢铁研究院有限公司 | Automatic control method for camber and wedge of hot-rolled strip steel roughing mill set |
| CN105234189A (en) * | 2015-11-13 | 2016-01-13 | 北京首钢自动化信息技术有限公司 | Slab sickle bending control system and method used for roughing mill |
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