CN104226698B - A kind of strip finishing temperature feed forward control method - Google Patents

A kind of strip finishing temperature feed forward control method Download PDF

Info

Publication number
CN104226698B
CN104226698B CN201310248089.9A CN201310248089A CN104226698B CN 104226698 B CN104226698 B CN 104226698B CN 201310248089 A CN201310248089 A CN 201310248089A CN 104226698 B CN104226698 B CN 104226698B
Authority
CN
China
Prior art keywords
temperature
steel
unit
strip
strip steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201310248089.9A
Other languages
Chinese (zh)
Other versions
CN104226698A (en
Inventor
沈际海
张健民
张晓峰
谭耘宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Baosteel Group Corp
Original Assignee
Shanghai Baosteel Group Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Baosteel Group Corp filed Critical Shanghai Baosteel Group Corp
Priority to CN201310248089.9A priority Critical patent/CN104226698B/en
Publication of CN104226698A publication Critical patent/CN104226698A/en
Application granted granted Critical
Publication of CN104226698B publication Critical patent/CN104226698B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses a kind of strip finishing temperature feed forward control method, band steel is divided into 1 by along its length, 2,3 ... m, n is N section altogether, determines band steel cooling water flow adjustment amount for current control section m section according to following formula: <maths num=" 0001 " >

Description

A kind of strip finishing temperature feed forward control method
Technical field
The present invention relates to a kind of temperature-controlled process, particularly relate to the finishing temperature control method of band steel.
Background technology
With steel in the process of rolling, need to control the hot rolling finishing temperature of band steel to control product quality.At present, hot rolling finishing temperature controls to mainly contain three kinds of modes:
1. the cooling water between some old-fashioned rolling line frames is bang-bang control, only has standard-sized sheet and complete shut-down two states, and the water yield cannot consecutive variations in belt steel rolling process.Therefore, finishing temperature control mainly adopts the mill speed of accommodation zone steel, if finishing temperature is low, then improves mill speed; If finishing temperature is high, keep current mill speed, utilize belt steel temperature head temperature high, the feature that following temperature progressively reduces, reduce finishing temperature.
2. the cooling water between frame can regulate continuously, according to the height of finishing temperature, increases or reduces cooling water flow, thus playing thermoregulator effect.
3. comprehensive above-mentioned two kinds of control methods, namely the mode of adjustment in use speed and the mode of regulating pondage control finishing temperature simultaneously.
In the control of current finishing temperature, no matter be which kind of control mode above, be all adopt FEEDBACK CONTROL, namely come governing speed or cooling water flow according to the observed temperature after finish rolling.Wherein, the advantage that governing speed controls finishing temperature is that temperature governing speed is fast, and variations in temperature is steady; Shortcoming is that frequent governing speed can cause rolling stability to be deteriorated, and easily causes production accident, and the change of speed for section cooling temperature control also can bring impact.And by regulating the advantage of cooling water control finishing temperature between frame to be improve rolling stability, belt steel rolling speed, according to the speed regulation rolling formulated in rolling procedure, can improve the cold temperature control precision of layer to greatest extent; Shortcoming is that temperature governing response is slow, time delay is larger, and easily occur overshoot, temperature fluctuation is larger.
Current FEEDBACK CONTROL substantially all adopts PI controller, although only utilize FEEDBACK CONTROL also can reach control overflow, but as can be seen from control effects, speeds control meeting influence of rolled stability, the cold temperature of layer controls be subject to larger impact because of velocity variations, thus may the performance indications of influence zone steel, and adjusting cooling water flow temperature control, also to there is response speed slow, the shortcoming that temperature fluctuation is large.
Publication number is CN102145349, publication date is on August 10th, 2011, name is called that the Chinese patent literature of " a kind of method of stability contorting orientation silicon steel finishing temperature " discloses a kind of method of stability contorting orientation silicon steel finishing temperature, the workpiece thickness of more identical than other for orientation silicon steel trimmed size steel grade, by increasing workpiece thickness, is increased by 5% ~ 10% by it; Before finish rolling, intermediate blank head, tail adopt single de-scaling, and between finishing stand, cooling water takes the mode of watering opened successively; Increasing speed rolling and large throwing steel speed are taked in finish rolling, reduce finishing temperature fluctuation, ensure the stability of orientation silicon steel finishing temperature control, make orientation silicon steel finishing temperature fluctuation range stability contorting within 20 DEG C.
Publication number is CN102069095, publication date is on May 25th, 2011, the Chinese patent literature that name is called " a kind of finish rolling finishing temperature Forecast and control method of Corpus--based Method study " provides the finish rolling finishing temperature Forecast and control method of a kind of Corpus--based Method study, the method is at each control cycle, first with threading speed with specify the frame water yield for independent variable, finishing temperature is dependent variable, sets up statistics forecast model by finishing stands data, carries out real-time estimate to finishing temperature; Then under the prerequisite that the predicted value of forecast model is consistent with actual value variation tendency, based on given finish to gauge target temperature and forecast model, rolling time horizon optimized algorithm is adopted, to the finite time-domain rolling optimization control decision of water yield.
Summary of the invention
The object of this invention is to provide a kind of strip finishing temperature feed forward control method, it considers the different temperatures on the deviation of the band target temperature of steel and strip steel head observed temperature, strip length direction, and velocity variations in the operation of rolling, water yield change, with the cooling water flow between dynamic conditioning finishing stand, eliminate supplied materials variations in temperature, the impact of mill speed change on belt steel temperature as far as possible, thus reduce the regulated quantity of FEEDBACK CONTROL, ensure that band steel total length temperature is within the scope of control objectives, improves the control accuracy of strip finishing temperature.
To achieve these goals, the invention provides a kind of strip finishing temperature feed forward control method:
Band steel is divided into 1 along its length, 2,3 ... m ..., n is N section altogether, determines band steel cooling water flow adjustment amount for current control section m section according to following formula:
&Delta;Q = ( &Delta;T p + &Delta;T m ) * &PartialD; F &PartialD; T + &Delta;V * &PartialD; T &PartialD; V + &PartialD; F &PartialD; T + &Delta;F - - - ( 1 )
Control system performs cooling water flow adjustment amount Δ Q to cool the current control section of band steel.
In formula (1):
Δ T p(DEG C) is the observed temperature T that the 1st section strip steel exports in finish rolling c(namely finish rolling exports the belt steel surface temperature that temperature measurer records) and the target temperature T set tgtdeviation, namely
ΔT p=T tgt-T c;(2)
Δ T m(DEG C) is the mean temperature of m section strip steel in finish rolling porch with the mean temperature of the 1st section strip steel in finish rolling porch the temperature difference, namely
&Delta;T m = T ave m - T ave 1 - - - ( 3 )
In formula (3), m section strip steel is in the mean temperature of finish rolling porch with the mean temperature of the 1st section strip steel in finish rolling porch following method is all adopted to determine: band steel to be divided into 1 in a thickness direction, 2,3 ... i ..., j is J layer altogether, then the mean temperature T with steel avefor
T ave = ( T 1 2 + T 2 + &CenterDot; &CenterDot; &CenterDot; &CenterDot; &CenterDot; &CenterDot; + T i + &CenterDot; &CenterDot; &CenterDot; &CenterDot; &CenterDot; &CenterDot; + T j 2 ) j - 1 - - - ( 4 )
In formula (4), T 1, T 2, T iand T jthe respectively temperature of corresponding the 1st layer, the 2nd layer, i-th layer and jth layer on belt steel thickness direction, i.e. T 1, T 2t it jrepresent belt steel temperature distribution in a thickness direction, these band steel are all that those skilled in the art can obtain easily according to prior art in certain Temperature Distribution a bit or on a certain section of thickness direction, therefore be all known with steel Temperature Distribution in a thickness direction in the technical program, in addition on thickness direction the number of plies of dividing, in general, layering is more, then temperature is more accurate, but amount of calculation is also larger, therefore those skilled in the art can take the circumstances into consideration the number selecting j as required, such as j=J=5;
Δ V(m/s) be the speed that m section strip steel arrives finish rolling outlet thermometric place with the 1st speed V of section strip steel in finish rolling exit p1deviation, namely
&Delta;V = V k , - V p 1 - - - ( 5 )
In formula (5), V p1for control system specified value, the method that control system obtains this set-point is the prior art that those skilled in that art know, and does not therefore repeat them here herein; And m section strip steel arrives the speed in finish rolling exit then can be determined by following model:
S = &Sigma; i = 1 k - 1 ( h i &times; L i ) h k + s 0
V k &prime; = ( V k ) 2 + 2 &times; a &times; S - - - ( 6 )
In formula (6), h i(m) band steel exit thickness at i-th finishing stand place for recording, L im roll centre that () is intrinsic i-th finishing stand to the distance of the i-th+1 finishing stand roll centre, h km () is the exit thickness at the band steel that records an in the end finishing stand place, s 0m roll centre that () is last finishing stand to the distance of finish rolling exit point for measuring temperature, V k(m/s) speed of the current band steel at an in the end finishing stand place for knowing, a is the band steel current acceleration that can know, it is also standard unit; For general finishing mill, finishing stand has from F1-F7 seven, therefore general k=7;
Δ F(m 3/ h) be m section strip steel arrive finishing mill porch time current cooling water actual flow F cwith the actual cooling water flow F of the 1st section strip steel that control system is given p1deviation, namely;
ΔF=F c-F p1(7)
In formula (7), set-point F p1that those skilled in the art are easy to just can obtain according to prior art, F cit is measured value;
for cooling water flow is to the sensitivity of temperature, i.e. the variable quantity of cooling water and the ratio of temperature variation corresponding with it;
for strip speed is to the sensitivity of temperature, i.e. the variable quantity of temperature and the ratio of belt steel rolling velocity variable corresponding with it.
Above-mentioned cooling water flow can be obtained by following formula the sensitivity of temperature:
&PartialD; F &PartialD; T = &Delta;f T ave 1 &prime; - T 1 &prime; - - - ( 8 )
In formula (8), (DEG C) represents the mean temperature of the 1st given section strip steel, and this mean temperature is that the computational methods of the mean temperature being adopted formula (4) corresponding by the 1st given section strip steel Temperature Distribution are in a thickness direction obtained, Δ f(m 3/ h) be the cooling water flow increased arbitrarily on the given cooling water flow basis of the 1st section strip steel, T ' 1the average temperature value of the 1st section strip steel corresponding after (DEG C) expression increases the water yield of Δ f on the 1st original flow basis of section strip steel, it is also adopt the algorithm of the mean temperature mentioned in the technical program to try to achieve.
It should be noted that, in the technical program, due to for cooling water flow is to the sensitivity of temperature, that is it is a slope, therefore calculate the model of cooling water flow to the sensitivity of temperature is not limited in above-mentioned one, those skilled in the art should know, have the cooling water flow variable quantity of corresponding relation and temperature variation corresponding with it all can calculate cooling water flow to the sensitivity of temperature.
In the technical program, mill speed (or being called tape running speed, the band steel speed of travel, threading speed etc.) can be obtained by following formula the sensitivity of temperature:
&PartialD; T &PartialD; V = T ave max - T ave 1 &prime; V max - V 1 - - - ( 9 )
In formula (9), V 1(m/s) represent the 1st given section strip steel threading speed, it is equally also that those skilled in that art can obtain according to prior art, V max(m/s) represent the maximum mill speed of the 1st section strip steel, this maximum mill speed is the intrinsic limit value under corresponding given rolling mill practice, and therefore it is also known, (DEG C) represents the mean temperature of the 1st section strip steel under maximum mill speed, and it is still calculated by band steel Temperature Distribution in a thickness direction, (DEG C) represents that the 1st section strip steel is V in speed 1(m/s) mean temperature under, this mean temperature is that the computational methods of the mean temperature being adopted formula (4) corresponding by the 1st given section strip steel Temperature Distribution are in a thickness direction obtained.
In order to improve the accuracy of temperature in the technical program further, the observed temperature (i.e. belt steel surface temperature) of the band steel a certain section (such as m section) recorded can also be adopted to revise this section strip steel Temperature Distribution in a thickness direction, by the temperature T ' through revising 1as T isubstitution formula (4) tries to achieve the mean temperature of this section strip steel:
T i &prime; = T m * T i T 1 - - - ( 10 )
In formula (10), T mthe observed temperature that (DEG C) is this section strip steel, T 1(DEG C) is the band steel temperature of the 1st layer in a thickness direction before correction, T i(DEG C) is the band steel temperature of i-th layer in a thickness direction before correction.
It should be noted that in addition, in the technical program, m section strip steel is in the mean temperature of finish rolling porch can according to introduce in the technical program by the Temperature Distribution on belt steel thickness direction calculate after, the observed temperature recorded by the temperature measurer of finishing mill porch carries out revising rear acquisition.
But, in the operation of rolling of reality, band steel is longer the closer to its exposure aerial time of afterbody, therefore more easily iron scale is produced, the belt steel temperature accuracy generation deviation that the iron scale produced can make temperature measurer record, in general be on the low side, therefore preferably adopt following method to determine the mean temperature of m section strip steel in finish rolling porch
The mean temperature of this m section strip steel is tried to achieve according to formula (10) and formula (4)
T i &prime; = T m * T i T 1 - - - ( 10 )
T ave = ( T 1 2 + T 2 + &CenterDot; &CenterDot; &CenterDot; &CenterDot; &CenterDot; &CenterDot; + T i + &CenterDot; &CenterDot; &CenterDot; &CenterDot; &CenterDot; &CenterDot; + T j 2 ) j - 1 - - - ( 4 )
Simultaneously according to the temperature of m section strip steel in roughing exit and the air cooling time of its arrival finish rolling porch, obtain the mean temperature of m section strip steel in finish rolling porch
T Ri m = f ( T s &prime; T f &prime; t ) - - - ( 11 )
Much more no longer formula (11) is the one-dimensional and unsteady state difference equation calculating radiation thermal conduction, its air cooling model known for those skilled in that art, therefore to introduce at this herein.T sthe Temperature Distribution of m section strip steel on the thickness direction of roughing exit that (DEG C) can be known for those skilled in that art, T f(DEG C) is environment temperature, and t is air cooling time, namely in the difference in the thermometric moment of finish rolling porch and the thermometric moment in roughing exit, (DEG C) is the m section strip steel Temperature Distribution in a thickness direction calculated through air cooling, can obtain accordingly according to formula (4)
Then, according to obtain the mean temperature of m section strip steel in finish rolling porch that is compare and choose value larger in the two as the mean temperature of m section strip steel in finish rolling porch.
The control length those skilled in that art of each section strip steel in the technical program can select as one sees fit, and such as each section of control section is 1m.
In addition, it should be noted that, in general, the 1st section of the control of band steel also referred to as strip steel head.
Strip finishing temperature feed forward control method of the present invention passes through technique scheme, effectively eliminate supplied materials temperature and the impact of mill speed change on finishing temperature, reduce the significantly adjustment of existing FEEDBACK CONTROL to cooling water flow, thus make finishing temperature easier close to desired value.
Detailed description of the invention
Below will be described further strip finishing temperature feed forward control method of the present invention according to specific embodiment, but this explanation does not form inappropriate limitation of the present invention.
Table 1 and table 2 list the every data-oriented of band steel before finish rolling roll control in the present embodiment:
Table 1.
F1 F2 F3 F4 F5 F6 F7
Rack outlet thickness (mm) 28.57 19.32 14.02 10.44 8.19 6.66 6.0
Each frame threading speed (m/s) 1.49 2.2 3.03 4.07 5.19 6.38 7
Table 2.
Workpiece thickness 45.5mm
Finish to gauge target temperature 880℃
Allow maximum mill speed 9.9m/s
F7 center is to the distance of finish rolling outlet temperature measurer 10.8m
Frame spacing 5.5m
On strip length direction, every 1m divides a control section, determines band steel cooling water flow adjustment amount for current control section m section according to following formula:
&Delta;Q = ( &Delta;T p + &Delta;T m ) * &PartialD; F &PartialD; T + &Delta;V * &PartialD; T &PartialD; V * &PartialD; F &PartialD; T + &Delta;F
Wherein:
(1) the band steel the 1st section obtained according to the finish to gauge target temperature 880 DEG C of this band steel and actual measurement, in the temperature 885 DEG C in finish rolling exit, obtains
△T p=T tgt-T c=880-885=-5i
(2), after the success of head threading, subsequent control section is triggering following band steel and the differential thermal calculation of head with steel in finish rolling porch when entering F1 frame:
(2a) known that the measuring tempeature of the 6th control section in roughing exit is 1030 DEG C, its Temperature Distribution on the thickness direction of roughing exit is [1025,1050,1085,1045,1022], is T by the revised Temperature Distribution of measuring tempeature s=[1030,1055,1090,1050,1027], mean temperature is 1056 DEG C, and the 6th section is 30s(and air cooling time in the thermometric moment in roughing exit and the thermometric time at intervals of finish rolling porch is 30s), the air cooling model so utilizing those skilled in that art to know brings 5 layers of Temperature Distribution and air cooling time into air cooling model, calculates
Actual recording is with the temperature of steel the 6th section of control section in finish rolling porch to be 997 DEG C, obtains after adopting this observed temperature to revise the 6th section of control section Temperature Distribution in a thickness direction T Fi m = [ 997,1021,1055,1016,994 ] , Obtain accordingly
T ave m = Max ( T Rave m , T Fave m ) = Max ( 1026,1022 ) = 1026
Therefore the mean temperature of the 6th section of control section in finish rolling porch in the present embodiment just should be 1026 DEG C.
(2b) known that the temperature that strip steel head (namely the 1st section) records in finish rolling porch is 1029 DEG C, also known the Temperature Distribution T of the 1st section of slab simultaneously i 1=[1032,1055,1070,1056,1030], adopt formula (10) to revise this Temperature Distribution, namely
T i &prime; = 1029 * T 1 i 1032
The 1st section of Temperature Distribution through revising is:
T′ i=[1029,1052,1067,1053,1027]
According to formula (4) calculate to obtain the mean temperature of the 1st section strip steel in finish rolling porch it is 1050 DEG C.
(2c) temperature difference of current 6th section of control section in finish rolling porch with band steel the 1st section of control section finish rolling porch is calculated:
(3) computational speed is to the sensitivity of temperature
Control system is according to the Temperature Distribution T on band steel the 1st section of thickness direction i 1, supplied materials thickness t, initial threading speed V p0, initial cooling water flow F p0, strip plastic deformation power P and finish to gauge target temperature T tgtobtain f p1=436m 3/ h and V p1(i.e. V hereinafter 1)=7m/s:
[ T ave 1 &prime; , T i 1 &prime; , F p 1 , V p 1 ] = f ( T i 1 , t , V p 0 , F p 0 , P , T tgt )
This formula is the difference equation commonly used in the art, is that those skilled in that art know, and therefore no longer carries out expansion to it herein and describes.
According to the maximum mill speed V allowed max=9.9m/s, the given V that control system is calculated by the prior art in this area 1=7m/s, and the maximum mill speed of correspondence that control system is calculated by the prior art in this area calculate:
(4) cooling water flow is calculated to the sensitivity of temperature:
In the present embodiment, at the cooling water flow F that the 1st section strip steel is given p1=436m 3the basis of/h increases Δ f=200m 3the cooling water flow of/h, control system is calculated by the prior art that those skilled in that art know increases 200m 3the average temperature value of the 1st section strip steel that the cooling water flow of/h is corresponding is 859 DEG C, then calculates:
(5) speed difference of the 6th section strip steel and the 1st section strip steel is calculated
When current control section the 6th section strip steel enters finishing stand F1, the V that control system gathers 7for 7.8m/s, current acceleration a=0.06m/s 2, so can calculate according to table 1 and formula (6) the speed V that the 6th section strip steel arrives F7 7':
S = &Sigma; i = 1 6 ( h i * L i ) h 7 + s 0
S = ( 28.57 + 19.32 + 14.0 + 10.44 + 8.19 + 6.66 ) * 5.5 6.0 + 10.8 = 90.7 m
V 7 = ( V 7 ) 2 + 2 * a * S = 7.8 2 + 2 * 0.06 * 90.7 = 8.46 ( m / s ) &prime;
&Delta;V = V 7 &prime; - V p 1 = 8.46 - 7.0 = 1.46 ( m / s )
(6) the actual flow F of the current cooling water collected when the 6th section strip steel arrives finishing mill porch is calculated c=500m 3/ h and the given actual cooling water flow F of the 1st section strip steel of control system p1deviation
△F=F c-F p1=500-436=64m 3/h
(7) Δ Q is calculated thus
&Delta;Q = ( &Delta;T p + &Delta;T m ) * &PartialD; F &PartialD; T + &Delta;V * &PartialD; T &PartialD; V * &PartialD; F &PartialD; T + &Delta;F
= ( - 5 - 24 ) * 9.09 + 1.46 * 9.65 * 9.09 + 64
= - 71.54 m 3 / h
It should be noted that above cited embodiment is only specific embodiments of the invention.Obvious the present invention is not limited to above embodiment, and the similar change thereupon made or distortion are that those skilled in the art can directly draw from content disclosed by the invention or be easy to just associate, and all should belong to protection scope of the present invention.

Claims (7)

1. a strip finishing temperature feed forward control method, is characterized in that:
Band steel is divided into 1 along its length, 2,3 ... m ..., n is N section altogether, determines band steel cooling water flow adjustment amount for current control section m section according to following formula:
&Delta; Q = ( &Delta;T p + &Delta;T m ) * &part; F &part; T + &Delta; V * &part; T &part; V * &part; F &part; T + &Delta; F ;
Control system performs cooling water flow adjustment amount Δ Q to cool the current control section of band steel;
Wherein:
Δ T pthe observed temperature that to be the 1st section strip steel export in finish rolling and the deviation of target temperature, its unit is DEG C;
Δ T mbe the mean temperature of m section strip steel in finish rolling porch and the 1st section strip steel temperature difference in the mean temperature of finish rolling porch, its unit is DEG C, and described mean temperature adopts following method to determine: band steel is divided into 1 in a thickness direction, 2,3 ... i ..., j is J layer altogether; With the mean temperature of steel t 1, T 2, T iand T jthe respectively temperature of corresponding the 1st layer, the 2nd layer, i-th layer and jth layer on belt steel thickness direction;
Δ V is the deviation that m section strip steel arrives that the finish rolling outlet speed at thermometric place and the 1st section strip steel export the speed at thermometric place in finish rolling, and its unit is m/s;
The actual flow of current cooling water and the deviation of the 1st section strip steel actual cooling water flow when Δ F is m section strip steel arrival finishing mill porch, its unit is m 3/ h;
for cooling water flow is to the sensitivity of temperature;
for strip speed is to the sensitivity of temperature;
Wherein, adopt following model determination cooling water flow to the sensitivity of temperature:
&part; F &part; T = &Delta; f T a v e 1 &prime; - T 1 &prime;
In formula, represent that the mean temperature that the 1st section strip steel is given, its unit are DEG C, Δ f is the cooling water flow increased arbitrarily on the given cooling water flow basis of the 1st section strip steel, and its unit is m 3/ h, T 1' represent the cooling water flow Δ f that the 1st section strip steel increases arbitrarily on given cooling water flow basis after corresponding average temperature value, its unit is DEG C;
Adopt the sensitivity of following model determination rate on temperature:
&part; T &part; V = T a v e max - T a v e 1 &prime; V m a x - V 1
In formula, V 1represent the given threading speed of the 1st section strip steel, its unit is m/s, V maxrepresent the maximum mill speed of the 1st section strip steel, its unit is m/s, represent the mean temperature of the 1st section strip steel under maximum mill speed, its unit is DEG C, represent that the 1st section strip steel is at speed V 1under band steel mean temperature, its unit is DEG C.
2. strip finishing temperature feed forward control method as claimed in claim 1, is characterized in that, adopts the observed temperature of a certain section of the band steel recorded to revise this section strip steel Temperature Distribution in a thickness direction, by the temperature T through revising i' as T itry to achieve the mean temperature of this section strip steel:
T 1 &prime; = T m * T i T 1
In formula, T mfor the observed temperature of this section strip steel, its unit is DEG C, T 1for the band steel temperature of the 1st layer in a thickness direction before revising, its unit is DEG C, T ifor the band steel temperature of i-th layer in a thickness direction before revising, its unit is DEG C.
3. strip finishing temperature feed forward control method as claimed in claim 1, is characterized in that, m section strip steel arrives the speed V at finish rolling outlet thermometric place k' determined by following model:
S = &Sigma; i = 1 k - 1 ( h i &times; L i ) h k + s 0
V k &prime; = ( V k ) 2 + 2 &times; a &times; S
In formula, h ifor band steel is at the exit thickness of i-th finishing stand, its unit is m, L ibe the distance of roll centre to the i-th+1 finishing stand roll centre of i-th finishing stand, its unit is m, h kfor the exit thickness at a band steel in the end finishing stand place, its unit is m, s 0for the roll centre of last finishing stand is to the distance of finish rolling exit point for measuring temperature, its unit is m, V kfor the speed of the in the end current band steel at a finishing stand place, its unit is m/s, a is band steel current acceleration, and its unit is m/s 2.
4. strip finishing temperature feed forward control method as claimed in claim 3, is characterized in that, described k=7.
5. strip finishing temperature feed forward control method as claimed in claim 1, is characterized in that, adopt following method to determine the mean temperature of m section strip steel in finish rolling porch
According to this section strip steel of observed temperature correction Temperature Distribution in a thickness direction of m section strip steel, by the temperature T through revising i' as T i, try to achieve the mean temperature of this m section strip steel its unit is DEG C, wherein T mfor the observed temperature of this section strip steel, its unit is DEG C, T 1for the band steel temperature of the 1st layer in a thickness direction before revising, its unit is DEG C, T ifor the band steel temperature of i-th layer in a thickness direction before revising, its unit is DEG C:
T i &prime; = T m * T i T 1
According to the temperature of m section strip steel in roughing exit and the air cooling time of its arrival finish rolling porch, obtain the mean temperature of m section strip steel in finish rolling porch its unit is DEG C;
According to obtain the mean temperature of m section strip steel in finish rolling porch its unit is DEG C.
6. strip finishing temperature feed forward control method as claimed in claim 1, is characterized in that, each section of control section of band steel is 1m.
7. strip finishing temperature feed forward control method as claimed in claim 1, is characterized in that, described j=J=5.
CN201310248089.9A 2013-06-20 2013-06-20 A kind of strip finishing temperature feed forward control method Active CN104226698B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310248089.9A CN104226698B (en) 2013-06-20 2013-06-20 A kind of strip finishing temperature feed forward control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310248089.9A CN104226698B (en) 2013-06-20 2013-06-20 A kind of strip finishing temperature feed forward control method

Publications (2)

Publication Number Publication Date
CN104226698A CN104226698A (en) 2014-12-24
CN104226698B true CN104226698B (en) 2016-04-27

Family

ID=52216106

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310248089.9A Active CN104226698B (en) 2013-06-20 2013-06-20 A kind of strip finishing temperature feed forward control method

Country Status (1)

Country Link
CN (1) CN104226698B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105344720B (en) * 2015-12-05 2017-04-05 北京首钢自动化信息技术有限公司 A kind of On-Line Control Method of fine-rolling strip steel finishing temperature
CN105436213B (en) * 2015-12-30 2017-06-23 东北大学 A kind of roller repairing device collector flow feedforward establishing method
CN107282650B (en) * 2017-06-30 2018-12-04 北京首钢自动化信息技术有限公司 A kind of high acceleration control method guaranteeing finishing temperature
CN111420998B (en) * 2019-01-10 2021-06-15 宝山钢铁股份有限公司 Method for uniformly heating width of precision rolling intermediate billet in length direction at temperature
CN111420999B (en) * 2019-01-10 2021-06-15 宝山钢铁股份有限公司 Method for controlling temperature difference between upper surface and lower surface of finish rolling intermediate billet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050009463A (en) * 2003-07-16 2005-01-25 주식회사 포스코 A Method of Controlling Finishing Mill Entry Temperature at Mini-Mill Processing
WO2008078908A1 (en) * 2006-12-22 2008-07-03 Posco Temperature controlling method and apparatus in hot strip mill
CN102069095A (en) * 2009-11-20 2011-05-25 刘斌 Statistical learning-based method for predicting and controlling finish rolling temperature in fine rolling
CN102145349A (en) * 2010-02-08 2011-08-10 鞍钢股份有限公司 Method for stably controlling finishing rolling temperature of oriented silicon steel
CN102189121A (en) * 2011-03-15 2011-09-21 莱芜钢铁集团有限公司 Final rolling temperature control method and system for hot rolling strip steel production line

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3518485B2 (en) * 2000-05-22 2004-04-12 Jfeスチール株式会社 Steel plate finishing temperature control method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050009463A (en) * 2003-07-16 2005-01-25 주식회사 포스코 A Method of Controlling Finishing Mill Entry Temperature at Mini-Mill Processing
WO2008078908A1 (en) * 2006-12-22 2008-07-03 Posco Temperature controlling method and apparatus in hot strip mill
CN102069095A (en) * 2009-11-20 2011-05-25 刘斌 Statistical learning-based method for predicting and controlling finish rolling temperature in fine rolling
CN102145349A (en) * 2010-02-08 2011-08-10 鞍钢股份有限公司 Method for stably controlling finishing rolling temperature of oriented silicon steel
CN102189121A (en) * 2011-03-15 2011-09-21 莱芜钢铁集团有限公司 Final rolling temperature control method and system for hot rolling strip steel production line

Also Published As

Publication number Publication date
CN104226698A (en) 2014-12-24

Similar Documents

Publication Publication Date Title
CN104226698B (en) A kind of strip finishing temperature feed forward control method
CN101347822B (en) Method for testing on-line temperature field of bloom continuous casting and method for controlling secondary cooling water
CN102639262B (en) Hot-rolled steel sheet manufacturing device, and hot-rolled steel sheet manufacturing method
CN103934278B (en) A kind of hot fine rolling band steel method for controlling thickness
CN103286141B (en) Hot continuous rolling fine-rolling strip steel Automatic control method of width
CN101618402A (en) Method for controlling planeness of cold-rolling strip steel
CN105344720B (en) A kind of On-Line Control Method of fine-rolling strip steel finishing temperature
CN105522003B (en) Inexpensive hot-strip sub-sectional cooling control method
CN104942019B (en) A kind of cold rolling of strip steel process Automatic control method of width
JP4966826B2 (en) Winding temperature control device and control method
CN103286143A (en) System and method for measuring and controlling heating temperature of edge of hot rolling slab
CN103028615B (en) Method for predicting temperature evolution in hot continuous rolling process of strip steel
CN102688894B (en) A controlling method for hot rolled strip threading of a continuous mill set
CN102688900B (en) Method for guaranteeing hot continuous rolling mill finish rolling outlet temperature
CN103990653B (en) Entry temperature at finishing accuracy at target method of assuring
CN202700989U (en) Hot continuous rolling production line and laminar flow cooling system thereof
CN109013717B (en) A kind of hot continuous rolling centre base center portion temperature computation method
CN103240279B (en) The control device of continuous hot-rolling mill and the control method of continuous hot-rolling mill
CN107282650B (en) A kind of high acceleration control method guaranteeing finishing temperature
JP5565200B2 (en) Finishing temperature control device in hot rolling
CN103878185B (en) A kind of dynamic segment cooling control method for hot-rolling laminar cooling
CN105499279A (en) Feedforward control method for cold rolled strip shape
CN106557651B (en) A kind of optimization method and device of roller temperature model cootrol precision
JP5861436B2 (en) Hot finishing temperature control method, hot finishing temperature control device, and hot rolled metal sheet manufacturing method
CN104801550B (en) Method for controlling finish rolling steel throwing speed of hot continuous rolling mill

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model