CN108733901A - A kind of double skin pass mill groups are using roughness control as the process parameter optimizing method of target - Google Patents

A kind of double skin pass mill groups are using roughness control as the process parameter optimizing method of target Download PDF

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CN108733901A
CN108733901A CN201810410246.4A CN201810410246A CN108733901A CN 108733901 A CN108733901 A CN 108733901A CN 201810410246 A CN201810410246 A CN 201810410246A CN 108733901 A CN108733901 A CN 108733901A
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白振华
周靓
雷彤
严家庆
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Yanshan University
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby

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Abstract

The invention discloses a kind of double skin pass mill groups using roughness control as the process parameter optimizing method of target, with the actual value of finished strip surface roughness and the minimum target of desired value gap, optimizes flattening technological parameter.Its significance lies in that draught pressure, front and back tension and elongation percentage distribution coefficient by optimizing 1# and 2# racks, a kind of Two-stand Temper Mill group smoothing and rolling process that is suitable for is established using roughness control as the flattening technological parameter optimization method of target, improves the roughness control accuracy in smoothing and rolling process.

Description

A kind of double skin pass mill groups are using roughness control as the process parameter optimizing method of target
Technical field
The present invention relates to process parameter optimizing field, with thick in especially a kind of Two-stand Temper Mill group smoothing and rolling process Rugosity control is the flattening technological parameter optimization method of target.
Background technology
Belt steel surface roughness is mainly that the heredity of origin material strip steel surface is coarse in Two-stand Temper Mill group skin pass rolling Degree is added composition with the coining roughness of work roll surface when skin pass rolling, and heredity and the size for imprinting ability are mainly arrived Material factor (including strip steel specification, band hardness of steel etc.), flattening technological parameter (including draught pressure, tension, elongation percentage etc.), roll Technological parameter (including rolled after the roll surface attribute of roll, roll initial surface roughness, roll original roller type, roller-changing public Mileage, roller surface hardness etc.) and influence with roller system etc..But make a general survey of domestic and international pertinent literature[1-5], few to two-shipper Flattening technological parameter is furtherd investigate using roughness control as target in frame skin pass mill group smoothing and rolling process, in this way, double The research optimized as the flattening technological parameter of target using roughness control in rack skin pass mill group smoothing and rolling process just seems very It is necessary to.
Invention content
Purpose of the present invention is to flat with the actual value of finished strip surface roughness and the minimum objective optimization of desired value gap Whole technological parameter and a kind of double skin pass mill groups for providing are using roughness control as the process parameter optimizing method of target.
To achieve the above object, following technical scheme is used：The method of the invention includes the following steps：
Step a collects the equipment and technology parameter of Two-stand Temper Mill group；
Step b, initialization elongation percentage distribution coefficient ψ0And setting step delta ψ；
Step c, enables k1=0；
Step d, enables ψ=ψ0+k1Δψ；
Step e initializes average forward pull T21,0And setting step delta T21；
Step f, enables k2=0；
Step g, enables T21=T21,0+k2ΔT21；
Step h initializes average middle tension T20,0And setting step delta T20；
Step i, enables k3=0；
Step j, enables T20=T20,0+k3ΔT20；
Step k initializes average backward pull T10,0And setting step delta T10；
Step l, enables k4=0；
Step m, enables T10=T10,0+k4ΔT10；
Step n calculates 1#, 2# rack draught pressures P1、P2：
Wherein：
In formula：P1、P2The draught pressure of -1#, 2# rack, kN；
a0- smooth steel grade influences coefficient, -10.0≤a0≤10.0；
a1- travelling case statistics, -6.0≤a1≤6.0；
k3- resistance of deformation influences coefficient；
σs- band yield strength, MPa；
A-strain rate coefficient；
k1,k2- forward and backward tension weighting coefficient, k1=k2=0.5；
Step o judges inequality α1P1 *< P1< α2P1 *It is whether true；Wherein α1、α2It is set for 1# rack draught pressures and is Number, and 0 < α1< 1, α2> 1；If set up, it is transferred to step p；Otherwise it is transferred to step s；
Step p judges inequality α3P2 *< P2< α4P2 *It is whether true；Wherein α3、α4It is set for 2# rack draught pressures and is Number, and 0 < α3< 1, α4> 1；If set up, it is transferred to step q, is otherwise transferred to step s；
Step q calculates optimizing temper rolling technology model：
In formula：λ1- weighting coefficient；
Step r judges inequality F < F0It is whether true；Wherein, If inequality is set up, it is transferred to step s；Otherwise ψ is enabledy=ψ, T21y=T21, T20y=T20, T10y=T10, it is transferred to step (s)；
Step s judges inequality k4< (T10max-T10,0)/ΔT10It is whether true；If set up, it is transferred to step m；Otherwise It is transferred to step t；
Step t judges inequality k3< (T20max-T20,0)/ΔT20It is whether true；If set up, it is transferred to step j, otherwise It is transferred to step u；
Step u judges inequality k2< (T21max-T21,0)/ΔT21It is whether true；If set up, it is transferred to step g；Otherwise It is transferred to step v；
Step v judges inequality k1< (ψmax-ψ0Whether)/Δ ψ is true；If set up, it is transferred to step d；Otherwise it is transferred to step Rapid w；
Step w exports best elongation percentage distribution coefficient ψy, most preferably averagely forward pull T21y, best average middle tension T20y, most Good average backward pull T10y, complete Two-stand Temper Mill group smoothing and rolling process and join by the flattening process of target of roughness control Number optimization.
Further, in step a, the equipment and technology parameter for collecting Two-stand Temper Mill group includes the following steps：
A1 collects the roller technology parameter of Two-stand Temper Mill group, including：The work roll diameter D of 1#, 2# rack1、D2；
A2 collects Two-stand Temper Mill group correlation rolling technological parameter, including：The yield strength σ of bands, 1#, 2# racks Strip width B1B1, 1#, the thickness h of the supplied materials of 2# racks01h02, breaking elongation ε, 1#, the mill speed V of 2# racks1V2, 1#, The draught pressure setting value P of 2# racks1 *P2 *, 1#, the friction coefficient μ of 2# racks1μ2, target roughness Ras, in target roughness Limit Rasa,max；
A3 collects the technology characteristics parameter of Two-stand Temper Mill group, including：Maximum elongation percentage distribution coefficient ψ allowablemax, perhaps With the average forward pull T of maximum21max, maximum average middle tension T allowable20max, maximum average backward pull T allowable10max。
Compared with prior art, the method for the present invention has the following advantages that：By the draught pressure, preceding for optimizing 1# and 2# racks Backward pull and elongation percentage distribution coefficient, establish one kind and being suitable for Two-stand Temper Mill group smoothing and rolling process and be with roughness control The flattening technological parameter optimization method of target improves the roughness control accuracy in smoothing and rolling process.
Description of the drawings
Fig. 1 is the flow chart of the method for the present invention.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
Embodiment 1
(a) capital equipment and technological parameter for collecting Two-stand Temper Mill group, mainly include the following steps that：
A1) collect Two-stand Temper Mill group roller technology parameter, include mainly：The work roll diameter D of 1#, 2# rack1 =340mm, D2=356mm；
A2 Two-stand Temper Mill group correlation rolling technological parameter) is collected, includes mainly：The yield strength σ of bands= 500MPa, 1#, the strip width B of 2# racks1=908mmB2The supplied materials thickness h of=914mm, 1#, 2# rack01=0.267mmh02 =0.243mm, breaking elongation ε=1.5%, 1#, the mill speed V of 2# racks1=400m/minV2=380m/min, 1#, 2# machine The draught pressure setting value P of frame1 *=3850kNP2 *The friction coefficient μ of=3500kN, 1#, 2# rack1=0.3 μ2=0.4, target Roughness Ras=0.3 μm, target roughness upper limit Rasa,max=0.5 μm；
A3) collect Two-stand Temper Mill group technology characteristics parameter, include mainly：Maximum elongation percentage distribution coefficient allowable ψmax=0.8, maximum average forward pull T allowable21max=400MPa, maximum average middle tension T allowable20max=300MPa, it is allowable The average backward pull T of maximum10max=200MPa；
(b) initialization elongation percentage distribution coefficient ψ0=0.5 and setting step delta ψ=0.05；
(c) k is enabled1=0；
(d) ψ=ψ is enabled0+k1Δ ψ=0.5+0=0.5；
(e) average forward pull T is initialized21,0=180MPa and setting step delta T21=5MPa；
(f) k is enabled2=0；
(g) T is enabled21=T21,0+k2ΔT21=180+0=180MPa；
(h) tension T during initialization is average20,0=130MPa and setting step delta T20=5MPa；
(i) k is enabled3=0；
(j) T is enabled20=T20,0+k3ΔT20=130+0=130MPa；
(k) average backward pull T is initialized10,0=80MPa and setting step delta T10=5MPa；
(l) k is enabled4=0；
(m) T is enabled10=T10,0+k4ΔT10=80+0=80MPa；
(n) 1#, 2# rack draught pressures P are calculated1、P2：
Wherein：Take a0=3, a1=1.8, k3=0.7, a=0.5.
It calculates：1#, 2# rack draught pressure P1=4899.574kN, P2=4385.926kN.
(o) judge inequality α1P1 *< P1< α2P1 *It is whether true？Take α1=0.7, α2=1.3, inequality is set up, and is transferred to Step (p)；
(p) judge inequality α3P2 *< P2< α4P2 *It is whether true？Take α3=0.7, α4=1.3, inequality is set up, and is transferred to Step (q)；
(q) optimizing temper rolling technology model is calculated：
Take λ1=0.7, calculate to obtain F=0.303.
(r) judge inequality F < F0It is whether true？
WhereinInequality is set up, and step (s) is transferred to；
(s) judge inequality k4< (T10max-T10,0)/ΔT10It is whether true？Inequality is set up, and step (m) is transferred to；
Enter cyclic process at this time, until inequality is invalid in judgement (s) step, is transferred to step (t)；Until judging (t) inequality is invalid in step, is transferred to step (u)；Until inequality is invalid in judgement (u) step, it is transferred to step (v)； Until inequality is invalid in judgement (v) step, it is transferred to step (w)；
(w) best elongation percentage distribution coefficient ψ is exportedy=0.675, most preferably averagely forward pull T21y=265MPa, it is best average Middle tension T20y=205MPa, most preferably averagely backward pull T10y=120MPa, complete Two-stand Temper Mill group smoothing and rolling process with Roughness control is that the flattening technological parameter of target optimizes.
1 effect of optimization contrast table a of table
Embodiment 2
(a) capital equipment and technological parameter for collecting Two-stand Temper Mill group, mainly include the following steps that：
A1) collect Two-stand Temper Mill group roller technology parameter, include mainly：The work roll diameter D of 1#, 2# rack1 =350mm, D2=360mm；
A2 Two-stand Temper Mill group correlation rolling technological parameter) is collected, includes mainly：The yield strength σ of bands= 500MPa, 1#, the strip width B of 2# racks1=902mmB2The supplied materials thickness h of=911mm, 1#, 2# rack01=0.240mmh02 =0.231mm, breaking elongation ε=1.5%, 1#, the mill speed V of 2# racks1=400m/minV2=380m/min, 1#, 2# machine The draught pressure setting value P of frame1 *=3800kNP2 *The friction coefficient μ of=3450kN, 1#, 2# rack1=0.3 μ2=0.4, target Roughness Ras=0.4 μm, target roughness upper limit Rasa,max=0.6 μm；
A3) collect Two-stand Temper Mill group technology characteristics parameter, include mainly：Maximum elongation percentage distribution coefficient allowable ψmax=0.8, maximum average forward pull T allowable21max=400MPa, maximum average middle tension T allowable20max=300MPa, it is allowable The average backward pull T of maximum10max=200MPa；
(b) initialization elongation percentage distribution coefficient ψ0=0.5 and setting step delta ψ=0.05；
(c) k is enabled1=0；
(d) ψ=ψ is enabled0+k1Δ ψ=0.5+0=0.5；
(e) average forward pull T is initialized21,0=200MPa and setting step delta T21=5MPa；
(f) k is enabled2=0；
(g) T is enabled21=T21,0+k2ΔT21=200+0=200MPa；
(h) tension T during initialization is average20,0=150MPa and setting step delta T20=5MPa；
(i) k is enabled3=0；
(j) T is enabled20=T20,0+k3ΔT20=150+0=150MPa；
(k) average backward pull T is initialized10,0=100MPa and setting step delta T10=5MPa；
(l) k is enabled4=0；
(m) T is enabled10=T10,0+k4ΔT10=100+0=100MPa；
(n) 1#, 2# rack draught pressures P are calculated1、P2：
In formula：Take a0=3, a1=1.8, k3=0.7, a=0.5.
It calculates：1#, 2# rack draught pressure P1=4652.374kN, P2=4065.347kN.
(o) judge inequality α1P1 *< P1< α2P1 *It is whether true？Take α1=0.7, α2=1.5, inequality is set up, and is transferred to Step (p)；
(p) judge inequality α3P2 *< P2< α4P2 *It is whether true？Take α3=0.7, α4=1.5, inequality is set up, and is transferred to Step (q)；
(q) optimizing temper rolling technology model is calculated：
Take λ1=0.7, calculate to obtain F=0.412.
(r) judge inequality F < F0It is whether true？Wherein Inequality is set up, and step (s) is transferred to；
(s) judge inequality k4< (T10max-T10,0)/ΔT10It is whether true？Inequality is set up, and step (m) is transferred to；
Enter cyclic process at this time, until inequality is invalid in judgement (s) step, is transferred to step (t)；Until judging (t) inequality is invalid in step, is transferred to step (u)；Until inequality is invalid in judgement (u) step, it is transferred to step (v)； Until inequality is invalid in judgement (v) step, it is transferred to step (w)；
(w) best elongation percentage distribution coefficient ψ is exportedy=0.725, most preferably averagely forward pull T21y=220MPa, it is best average Middle tension T20y=185MPa, most preferably averagely backward pull T10y=110MPa, complete Two-stand Temper Mill group smoothing and rolling process with Roughness control is that the flattening technological parameter of target optimizes.
2 effect of optimization contrast table b of table
Before optimization After optimization
Product mean roughness (μm) 0.48 0.42
Product roughness qualification rate (%) 86 95
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.

Claims (2)

1. a kind of double skin pass mill groups are using roughness control as the process parameter optimizing method of target, including, which is characterized in that it is described Method includes the following steps：
Step a collects the equipment and technology parameter of Two-stand Temper Mill group；
Step b, initialization elongation percentage distribution coefficient ψ0And setting step delta ψ；
Step c, enables k1=0；
Step d, enables ψ=ψ0+k1Δψ；
Step e initializes average forward pull T21,0And setting step delta T21；
Step f, enables k2=0；
Step g, enables T21=T21,0+k2ΔT21；
Step h initializes average middle tension T20,0And setting step delta T20；
Step i, enables k3=0；
Step j, enables T20=T20,0+k3ΔT20；
Step k initializes average backward pull T10,0And setting step delta T10；
Step l, enables k4=0；
Step m, enables T10=T10,0+k4ΔT10；
Step n calculates 1#, 2# rack draught pressures P1、P2：
Wherein：
In formula：P1、P2The draught pressure of -1#, 2# rack, kN；
a0- smooth steel grade influences coefficient, -10.0≤a0≤10.0；
a1- travelling case statistics, -6.0≤a1≤6.0；
k3- resistance of deformation influences coefficient；
σs- band yield strength, MPa；
A-strain rate coefficient；
k1,k2- forward and backward tension weighting coefficient, k1=k2=0.5；
Step o judges inequality α1P1 *< P1< α2P1 *It is whether true；Wherein α1、α2Coefficient is set for 1# rack draught pressures, And 0 < α1< 1, α2> 1；If set up, it is transferred to step p；Otherwise it is transferred to step s；
Step p judges inequality α3P2 *< P2< α4P2 *It is whether true；Wherein α3、α4Coefficient is set for 2# rack draught pressures, And 0 < α3< 1, α4> 1；If set up, it is transferred to step q, is otherwise transferred to step s；
Step q calculates optimizing temper rolling technology model：
In formula：λ1- weighting coefficient；
Step r judges inequality F < F0It is whether true；Wherein,If Inequality is set up, and step s is transferred to；Otherwise ψ is enabledy=ψ, T21y=T21, T20y=T20, T10y=T10, it is transferred to step (s)；
Step s judges inequality k4< (T10max-T10,0)/ΔT10It is whether true；If set up, it is transferred to step m；Otherwise it is transferred to Step t；
Step t judges inequality k3< (T20max-T20,0)/ΔT20It is whether true；If set up, it is transferred to step j, is otherwise transferred to Step u；
Step u judges inequality k2< (T21max-T21,0)/ΔT21It is whether true；If set up, it is transferred to step g；Otherwise it is transferred to Step v；
Step v judges inequality k1< (ψmax-ψ0Whether)/Δ ψ is true；If set up, it is transferred to step d；Otherwise it is transferred to step w；
Step w exports best elongation percentage distribution coefficient ψy, most preferably averagely forward pull T21y, best average middle tension T20y, best flat Equal backward pull T10y, it is excellent as the flattening technological parameter of target using roughness control to complete Two-stand Temper Mill group smoothing and rolling process Change.
2. a kind of double skin pass mill groups according to claim 1 are using roughness control as the process parameter optimizing method of target, It is characterized in that：In step a, the equipment and technology parameter for collecting Two-stand Temper Mill group includes the following steps：
A1 collects the roller technology parameter of Two-stand Temper Mill group, including：The work roll diameter D of 1#, 2# rack1、D2；
A2 collects Two-stand Temper Mill group correlation rolling technological parameter, including：The yield strength σ of bands, 1#, the band of 2# racks Material width B1B1, 1#, the thickness h of the supplied materials of 2# racks01h02, breaking elongation ε, 1#, the mill speed V of 2# racks1V2, 1#, 2# machines The draught pressure setting value P of frame1 * The friction coefficient μ of 1#, 2# rack1μ2, target roughness Ras, the target roughness upper limit Rasa,max；
A3 collects the technology characteristics parameter of Two-stand Temper Mill group, including：Maximum elongation percentage distribution coefficient ψ allowablemax, it is allowable most Greatly averagely forward pull T21max, maximum average middle tension T allowable20max, maximum average backward pull T allowable10max。
CN201810410246.4A 2018-05-02 2018-05-02 A kind of double skin pass mill groups are using roughness control as the process parameter optimizing method of target Pending CN108733901A (en)

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CN112139255A (en) * 2019-06-27 2020-12-29 上海梅山钢铁股份有限公司 Elongation rate control method for double-frame wet temper mill
CN110624957A (en) * 2019-09-30 2019-12-31 江苏九天光电科技有限公司 Method for controlling process lubrication system of wet temper mill set by taking roughness as target
CN110624957B (en) * 2019-09-30 2021-03-23 江苏九天光电科技有限公司 Method for controlling process lubrication system of wet temper mill set by taking roughness as target

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Application publication date: 20181102