CN108067503A - A kind of cold continuous rolling OPTIMIZATION OF ROLLING method - Google Patents

A kind of cold continuous rolling OPTIMIZATION OF ROLLING method Download PDF

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Publication number
CN108067503A
CN108067503A CN201611001414.1A CN201611001414A CN108067503A CN 108067503 A CN108067503 A CN 108067503A CN 201611001414 A CN201611001414 A CN 201611001414A CN 108067503 A CN108067503 A CN 108067503A
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rack
roller
rolling
roll
value
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CN201611001414.1A
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Inventor
刘云峰
翟承荣
汪峰
周丽萍
何小丽
张晓宇
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Shanghai Meishan Iron and Steel Co Ltd
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Shanghai Meishan Iron and Steel Co Ltd
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Priority to CN201611001414.1A priority Critical patent/CN108067503A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
    • B21B33/02—Preventing fracture of rolls
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

The present invention relates to a kind of cold continuous rolling OPTIMIZATION OF ROLLING method, this method can cut down the peak value of roll force distribution to realize by reducing the degree of irregularity of roll force distribution.The optimization that the technical solution passes through rolling procedure, each rack roll gap pressure is made not occur simultaneously especially big, so that in cold continuous rolling process each rack roll gap pressure equiblibrium mass distribution, neither there is the phenomenon that integral value is bigger than normal, though not occurring the phenomenon that integral value is small but a certain rack value is bigger than normal again, so as to be finally reached the purpose for preventing quick-fried roller, and the production practices of cold continuous rolling are applied it to, good using effect is achieved, larger economic benefit is created for unit.

Description

A kind of cold continuous rolling OPTIMIZATION OF ROLLING method
Technical field
The present invention relates to a kind of optimization methods, and in particular to a kind of cold continuous rolling OPTIMIZATION OF ROLLING method belongs to cold rolling technology neck Domain.
Background technology
In recent years, with the increase of user's strip demand and the continuous improvement of performance, improve unit efficiency and into Quality is imperative, unreasonable due to unit coefficient of friction however as the raising of mill speed, is easy to cause sour milling train Group has the following problems in operation：Roller consumes larger or even roll and peeling, quick-fried roller problem occurs.It is right in previous research In reduce roller consumption and administer spalling of rolls mainly by change roll profile and roll dynamic parameter (bending roller force, roll shifting amount and Incline roller amount) or optimization roller management realize, seldom realized by changing rolling procedure complex optimum., therefore, urgent A kind of new technical solution is needed to solve above-mentioned technical problem.
The content of the invention
The present invention is exactly for technical problem in the prior art, provides a kind of cold continuous rolling OPTIMIZATION OF ROLLING method, should Technical solution is not in the case where influencing strip shape quality while each rack roll gap pressure is made not occur especially greatly so that cold continuous rolling , neither there is the phenomenon that integral value is bigger than normal in the roll gap pressure equiblibrium mass distribution of each rack in the process, though and there is not integral value Small but a certain rack is worth the phenomenon that bigger than normal, so as to be finally reached the purpose for preventing quick-fried roller, and applies it to the life of cold continuous rolling Production practice, achieves good using effect, benefit is brought to enterprise.
To achieve these goals, technical scheme is as follows, and a kind of cold continuous rolling OPTIMIZATION OF ROLLING method, feature exists In, it mainly includes the following steps that, it is specific as follows：
(a) capital equipment and technological parameter of five Stands Cold Tandem Mill groups are collected,
(b) involved procedure parameter during rolling schedule optimization is defined, is mainly most preferably depressed including 1-5# racks Measure apportioning cost εiy, 1-4# racks most preferably export tension setting value Tiy, 1-5# rack reduction ratio setting values εi0, 1-4# racks Export tension setting value Ti0, 1-5# machine frame rolling mill work roll bending power Siw, 1-5# machine frame rolling mill intermediate calender rolls bending roller forces Sim, last machine The exit plate shape value shape of frame strip；
(c) in order to improve regulating power of the unit to exit plate shape to greatest extent, the i-th rack work roll bending power is madeIntermediate calender rolls bending roller forceIntermediate calender rolls shifting amount be arranged to ground state ξ= 0；
(d) 1-4# rack reduction ratios ε is giveni0With 1-4# rack outlet tension Ti0Initial value X0=[εi0,Ti0]；
(e) the 5th rack reduction ratio initial value is calculated
(f) calculate under current working, working roll and the intermediate calender rolls roll force distribution value q of each rackimwjWith backing roll with Intermediate calender rolls roll force distribution value qimbj, last rack strip exit plate shape value shape；
(g) in the operation of rolling, on the premise of safety coefficient is considered, pressure value and exit plate shape value are equal between each breast roll It should not be more than License Value, therefore judge inequalityWhether set up, if inequality is set up, be transferred to simultaneously Step (h)；If inequality is invalid, redistributes reduction ratio and export the initial value of tension, be transferred to step (e)；(wherein, X =[εi,Ti], g'imw(X) it is working roll and intermediate calender rolls maximum unevenness coefficient, g'imb(X) it is backing roll and intermediate calender rolls maximum unevenness coefficient,
It calculates under current working, each quick-fried roller prevention comprehensive descision index γ of rackiValue, γiIt is smaller, then it represents quick-fried roller and goes out Existing probability is smaller, occurrence degree is lighter；Conversely, quick-fried roller prevention comprehensive descision index γiIt is bigger, then represent the general of quick-fried roller appearance Rate is bigger, occurrence degree is more serious.Wherein quick-fried roller prevention comprehensive descision index γiComputation model be： (wherein, gmw(X) it is averaged unevenness coefficient for working roll and intermediate calender rolls, gmb(X) it is averaged unevenness coefficient for backing roll and intermediate calender rolls,nmwFor Item member number between working roll and intermediate calender rolls roller；nmbThe item member number between backing roll and intermediate calender rolls roller)
(i) optimization object function under current rolling schedule is calculated α is weighting coefficient, general α=0.35-0.65, whereinThe quick-fried roller prevention for representing each rack is comprehensive The uniformity of judge index is closed,Represent the quick-fried roller prevention comprehensive descision index entirety numerical value of each rack；
(j) judge whether Powell conditions are true (namely judging whether object function F (X) is minimum)If Powell Condition is set up, then makes εiy=εi0、Tiy=Ti0, step (k) is transferred to, otherwise adjusts εi0、Ti0, it is transferred to step (e)；
(k) optimal rolling procedure ε is exportediy、Tiy, tandem mills are completed with the prevention of quick-fried roller as the rolling procedure of target Integrated optimization and setting.
As a modification of the present invention, the step (a) collects the capital equipment and technique of five Stands Cold Tandem Mill groups Parameter, it is specific as follows：
A1 the main equipment parameters of five Stands Cold Tandem Mill groups) are collected, are mainly included：1-5# rack working roll roller diameters Dwi,i =1,2 ... 5,1-5# rack intermediate calender rolls roller diameters Dmi, 1-5# rack support roller roller diameters Dbi, 1-5# rack working roller profile Δs Dwij(j is item member number), 1-5# rack support roller roll shape profile Δs Dbij, 1-5# rack working roll barrel lengths Lwi, 1-5# racks Support roller barrel length Lbi, 1-5# rack backing roll transmission sides and active side housing screw centre-to-centre spacing lb, 1-5# rack intermediate calender rolls Transmission side and active side bowed roller hydraulic cylinder centre-to-centre spacing lm, 1-5# rack working roll transmission sides and active side bowed roller hydraulic cylinder centre-to-centre spacing lw；
A2 the technology characteristics parameter of five Stands Cold Tandem Mill groups) is collected, is mainly included：1-5# rack working roll maximums are just curved Roller powerThe maximum negative bending roller force of 1-5# racks working rollThe maximum positive bending roller force of 1-5# racks intermediate calender rollsIt is maximum Negative bending roller forceUncoiler uncoiling tension T0, coiling machine curl tension T5, the permitted maximum of 1-4# rack relevant devices goes out Mouth tension Tmaxi, the permitted minimum outlet tension T of 1-4# rack relevant devicesmini, specific standard strip-rolling when 1-5# racks Milling train maximum depression rate ε allowableimax, specific standard strip-rolling when 1-5# machine frame rolling mills minimum reduction ratio ε allowableimin, intermediate calender rolls Permit maximum unevenness coefficient k with backing rollmb, intermediate calender rolls and the maximum unevenness coefficient k of working roll licensemw, last rack goes out The maximum plate shape value shape of mouth*, safety coefficient ξ；
A3 the technological parameter of band to be rolled, the main initial strength σ for including band) are collecteds0, strain hardening coefficient ks、 The width B of band, the thickness h of supplied materials0, finished product thickness h5, 5# racks muzzle velocity V5；
A4 main technique lubricating regime parameter) is collected, mainly including each rack emulsion flow setting value flowi, emulsification Liquid initial temperature Td, concentration of emulsion used C.
Compared with the prior art, advantages of the present invention is as follows, and the present invention combines the equipment and technology feature of tandem mills, It takes into full account influence of the rolling mill practice to roll gap pressure cross direction profiles value, is tracked using field test, theoretical research and experiment are rolled The method that the experiment of machine is combined, provide it is a kind of be suitable for cold continuous rolling process with quick-fried roller prevent for target rolling procedure synthesis it is excellent Change scheme, optimizes rolling procedure, in the case where not influencing strip shape quality while each rack roll gap pressure is made not go out It is now especially big so that the roll gap pressure equiblibrium mass distribution of each rack in cold continuous rolling process neither occurs that integral value is bigger than normal to be showed As, though and do not occur the phenomenon that small a certain rack value of integral value is bigger than normal, so as to be finally reached the purpose for preventing quick-fried roller, improving Brand competitiveness brings benefit to enterprise.
Description of the drawings
The entire flow chart of steps of Fig. 1 present invention；
The flow chart of Fig. 2 step a of the present invention.
Specific embodiment
In order to deepen the understanding of the present invention and understanding, the present invention is made with reference to the accompanying drawings and detailed description into one Step description and introduction.
Embodiment 1：Now by taking certain 1,420 5 Stands Cold Tandem Mill group as an example, certain 1,420 5 Stands Cold Tandem Mill is introduced in detail The calculating process of group roll profile optimization：
In the present embodiment, mainly include the following steps that：
(a) capital equipment and technological parameter of five Stands Cold Tandem Mill groups are collected, is mainly included the following steps that：
A1 the main equipment parameters of five Stands Cold Tandem Mill groups) are collected, are mainly included：1-5# rack working roll roller diameters Dwi= { 403.86,398.51,396.15,422.50,412.20 } mm, 1-5# rack intermediate calender rolls roller diameters Dmi=442.12,448.91, 472.46,484.92,474.39 mm, 1-5# rack support roller roller diameter Dbi=1198.26,1228.35,1204.59, 1221.23,1189.54,1-5# rack working roller profile Δs Dwij=0 (j is item member number), 1-5# rack support roller roll shapes Profile Δ Dbij=0,1-5# racks working roll barrel length Lwi=1420mm, 1-5# rack support roller barrel lengths Lbi= 1420mm, 1-5# rack backing roll transmission side and active side housing screw centre-to-centre spacing lb=2.55m, 1-5# rack intermediate roller drivens Side and active side bowed roller hydraulic cylinder centre-to-centre spacing lmIn=2.65m, 1-5# rack working roll transmission sides and active side bowed roller hydraulic cylinder The heart is away from lw=2.56m；
A2 the technology characteristics parameter of five Stands Cold Tandem Mill groups) is collected, is mainly included：1-5# rack working roll maximums are just curved Roller powerThe maximum negative bending roller force of 1-5# racks working roll1-5# rack intermediate calender rolls maximum is just Bending roller forceThe negative bending roller force of maximumUncoiler uncoiling tension T0=65MPa, coiling machine curling Tension T5The permitted maximum outlet tension T of=70MPa, 1-4# rack relevant devicesmaxi=230MPa, 1-4# rack correlations are set Standby permitted minimum outlet tension Tmini1-5# machine frame rolling mills maximum depression allowable when=80MPa, specific standard strip-rolling Rate εimax=0.45,1-5# machine frame rolling mills minimum reduction ratio ε allowable during specific standard strip-rollingimin=0.15, intermediate calender rolls and branch The maximum unevenness coefficient k of runner licensemb=0.5, intermediate calender rolls and the maximum unevenness coefficient k of working roll licensemw=0.9, it is last Rack outlet maximum plate shape value shape*=14I, safety coefficient ξ=0.9；
A3 the technological parameter of band to be rolled, the main initial strength σ for including band) are collecteds0=390MPa, processing hardening Coefficient ks=1.35, the width B=812mm of band, the thickness h of supplied materials0=2.01mm, finished product thickness h5=0.18mm, 5# racks Muzzle velocity V5=1246m/min；
A4 main technique lubricating regime parameter) is collected, mainly including each rack emulsion flow setting value flowi= { 3019,3346,3400,3648,4200 } L/min, emulsion initial temperature Td=58 DEG C, concentration of emulsion used C=4.2%；
(b) involved procedure parameter during rolling schedule optimization is defined, is mainly most preferably depressed including 1-5# racks Measure apportioning cost εiy, 1-4# racks most preferably export tension setting value Tiy, 1-5# rack reduction ratio setting values εi0, 1-4# racks Export tension setting value Ti0, 1-5# machine frame rolling mill work roll bending power Siw, 1-5# machine frame rolling mill intermediate calender rolls bending roller forces Sim, last machine The exit plate shape value shape of frame strip；
(c) in order to improve regulating power of the unit to exit plate shape to greatest extent, the i-th rack work roll bending power is madeIntermediate calender rolls bending roller forceIntermediate calender rolls shifting amount is arranged to Ground state ξ=0；
(d) 1-4# rack reduction ratios ε is giveni0={ 0.3,0.3,0.3,0.2 } and 1-4# rack outlet tension Ti0= {100,100,100,100}MPa；
(e) the 5th rack reduction ratio initial value is calculated
(f) calculate under current working, working roll and the intermediate calender rolls roll force distribution value q of each rackimwjWith backing roll with Intermediate calender rolls roll force distribution value qimbj, last rack strip exit plate shape value shape=13.4I；
(g) in the operation of rolling, on the premise of safety coefficient is considered, pressure value and exit plate shape value are equal between each breast roll It should not be more than License Value, therefore judge inequalityWhether set up, if inequality is set up, be transferred to simultaneously Step (h)；If inequality is invalid, redistributes reduction ratio and export the initial value of tension, be transferred to step (e)；
(h) calculate under current working, each quick-fried roller prevention comprehensive descision index γ of racki=0.634,0.622,0.743, 0.423,0.962}；
(i) optimization object function under current rolling schedule is calculated Whereinα=0.55；
(j) judge whether Powell conditions are true (namely judging whether object function F (X) is minimum)If Powell Condition is set up, then makes εiy=εi0、Tiy=Ti0, step (k) is transferred to, otherwise adjusts εi0、Ti0, it is transferred to step (e)；
(k) optimal rolling procedure ε is exportediy={ 0.443,0.442,0.381,0.325,0.193 }, Tiy=130.21, 146.86,156.23,165.64 } MPa is completed tandem mills and is set with the complex optimum that quick-fried roller is prevented as the rolling procedure of target It is fixed.
Finally, compare for convenience, be set forth this implementation in table 1 and reduction system that conventional method obtains, The distribution situation of power system and quick-fried roller prevention comprehensive descision index.It can be seen from Table 1 that for characterizing quick-fried roller probability of happening Object function drop to 0.155 from 0.476, have dropped 67.4%；For characterizing the plate shape value of last rack outlet strip shape quality Drop to 10.13I from 12.42I, have dropped 12.17%, illustrate correlation technique of the present invention can be good at reduce roller between The probability that quick-fried roller occurs in pressure and the operation of rolling improves the quality of strip exit surface.
The rolling procedure complex optimum result of 1 embodiment 1 of table and conventional method
It is controlled as can be seen that the technical solution effectively reduces tandem mills roller consumption with the quick-fried roller of roll, it can Further genralrlization is to the other similar units of plum steel, and popularizing application prospect is than broader.
It should be noted that above-described embodiment, is not used for limiting protection scope of the present invention, in above-mentioned technical proposal On the basis of made equivalents or replacement each fall within the scope that the claims in the present invention are protected.

Claims (2)

1. cold continuous rolling OPTIMIZATION OF ROLLING method, which is characterized in that it mainly includes the following steps that, it is specific as follows：
(a) capital equipment and technological parameter of five Stands Cold Tandem Mill groups are collected,
(b) involved procedure parameter during rolling schedule optimization is defined, mainly includes 1-5# racks optimal drafts point With value εiy, 1-4# racks most preferably export tension setting value Tiy, 1-5# rack reduction ratio setting values εi0, 1-4# rack outlets Tension setting value Ti0, 1-5# machine frame rolling mill work roll bending power Siw, 1-5# machine frame rolling mill intermediate calender rolls bending roller forces Sim, last rack band The exit plate shape value shape of steel；
(c) in order to improve regulating power of the unit to exit plate shape to greatest extent, the i-th rack work roll bending power is madeIntermediate calender rolls bending roller forceIntermediate calender rolls shifting amount is arranged to ground state ξ=0；
(d) 1-4# rack reduction ratios ε is giveni0With 1-4# rack outlet tension Ti0Initial value X0=[εi0,Ti0]；
(e) the 5th rack reduction ratio initial value is calculated
(f) calculate under current working, working roll and the intermediate calender rolls roll force distribution value q of each rackimwjWith backing roll and intermediate calender rolls Roll force distribution value qimbj, last rack strip exit plate shape value shape；
(g) in the operation of rolling, on the premise of safety coefficient is considered, pressure value and exit plate shape value should not between each breast roll It should be more than License Value, therefore judge inequalityWhether set up simultaneously, if inequality is set up, be transferred to step (h)；If inequality is invalid, redistributes reduction ratio and export the initial value of tension, be transferred to step (e)；(wherein, X= [εi,Ti], g'imw(X) it is working roll and intermediate calender rolls maximum unevenness coefficient, g'imb(X) it is backing roll and intermediate calender rolls maximum unevenness coefficient,
It calculates under current working, each quick-fried roller prevention comprehensive descision index γ of rackiValue, γiIt is smaller, then represent what quick-fried roller occurred Probability is smaller, occurrence degree is lighter；Conversely, quick-fried roller prevention comprehensive descision index γiIt is bigger, then it represents the probability that quick-fried roller occurs and gets over Greatly, occurrence degree is more serious.Wherein quick-fried roller prevention comprehensive descision index γiComputation model be： (wherein, gmw(X) it is averaged unevenness coefficient for working roll and intermediate calender rolls, gmb(X) it is averaged unevenness coefficient for backing roll and intermediate calender rolls,nmwFor Item member number between working roll and intermediate calender rolls roller；nmbThe item member number between backing roll and intermediate calender rolls roller)
(i) optimization object function under current rolling schedule is calculated α is weighting coefficient, general α=0.35-0.65, whereinRepresent the quick-fried roller prevention comprehensive descision index of each rack The uniformity,Represent the quick-fried roller prevention comprehensive descision index entirety numerical value of each rack；
(j) judge whether Powell conditions are true (namely judging whether object function F (X) is minimum)If Powell conditions It sets up, then makes εiy=εi0、Tiy=Ti0, step (k) is transferred to, otherwise adjusts εi0、Ti0, it is transferred to step (e)；
(k) optimal rolling procedure ε is exportediy、Tiy, it is excellent for the synthesis of the rolling procedure of target with the prevention of quick-fried roller to complete tandem mills Change setting.
2. cold continuous rolling OPTIMIZATION OF ROLLING method according to claim 1, which is characterized in that the step (a) collects five racks The capital equipment and technological parameter of tandem mills, it is specific as follows：
A1 the main equipment parameters of five Stands Cold Tandem Mill groups) are collected, are mainly included：1-5# rack working roll roller diameters Dwi, i=1, 2 ... 5,1-5# rack intermediate calender rolls roller diameters Dmi, 1-5# rack support roller roller diameters Dbi, 1-5# rack working roller profile Δs Dwij (j is item member number), 1-5# rack support roller roll shape profile Δs Dbij, 1-5# rack working roll barrel lengths Lwi, 1-5# racks support Roller barrel length Lbi, 1-5# rack backing roll transmission sides and active side housing screw centre-to-centre spacing lb, 1-5# rack intermediate roller drivens Side and active side bowed roller hydraulic cylinder centre-to-centre spacing lm, 1-5# rack working roll transmission sides and active side bowed roller hydraulic cylinder centre-to-centre spacing lw；
A2 the technology characteristics parameter of five Stands Cold Tandem Mill groups) is collected, is mainly included：The maximum positive bending roller force of 1-5# racks working rollThe maximum negative bending roller force of 1-5# racks working rollThe maximum positive bending roller force of 1-5# racks intermediate calender rollsMaximum is negative curved Roller powerUncoiler uncoiling tension T0, coiling machine curl tension T5, the permitted maximum outlet of 1-4# rack relevant devices Power Tmaxi, the permitted minimum outlet tension T of 1-4# rack relevant devicesmini, specific standard strip-rolling when 1-5# machine frame rolling mills Maximum depression rate ε allowableimax, specific standard strip-rolling when 1-5# machine frame rolling mills minimum reduction ratio ε allowableimin, intermediate calender rolls and branch The maximum unevenness coefficient k of runner licensemb, intermediate calender rolls and the maximum unevenness coefficient k of working roll licensemw, last rack outlet most Big plate shape value shape*, safety coefficient ξ；
A3 the technological parameter of band to be rolled, the main initial strength σ for including band) are collecteds0, strain hardening coefficient ks, band Width B, the thickness h of supplied materials0, finished product thickness h5, 5# racks muzzle velocity V5；
A4 main technique lubricating regime parameter) is collected, mainly including each rack emulsion flow setting value flowi, emulsion it is initial Temperature Td, concentration of emulsion used C.
CN201611001414.1A 2016-11-14 2016-11-14 A kind of cold continuous rolling OPTIMIZATION OF ROLLING method Pending CN108067503A (en)

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CN108144962A (en) * 2016-12-05 2018-06-12 上海梅山钢铁股份有限公司 A kind of cold continuous rolling OPTIMIZATION OF ROLLING method
CN111036693A (en) * 2019-11-15 2020-04-21 中冶华天工程技术有限公司 Rolling force energy checking and calculating method for high-speed hot-rolled wire
CN111842505A (en) * 2020-06-12 2020-10-30 宝钢湛江钢铁有限公司 Roll inclination control method for five-frame six-roll cold continuous rolling unit

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Publication number Priority date Publication date Assignee Title
CN108144962A (en) * 2016-12-05 2018-06-12 上海梅山钢铁股份有限公司 A kind of cold continuous rolling OPTIMIZATION OF ROLLING method
CN111036693A (en) * 2019-11-15 2020-04-21 中冶华天工程技术有限公司 Rolling force energy checking and calculating method for high-speed hot-rolled wire
CN111036693B (en) * 2019-11-15 2022-02-22 中冶华天工程技术有限公司 Rolling force energy checking and calculating method for hot-rolled high-speed wire rod
CN111842505A (en) * 2020-06-12 2020-10-30 宝钢湛江钢铁有限公司 Roll inclination control method for five-frame six-roll cold continuous rolling unit

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Application publication date: 20180525