CN107900111A - Secondary cold-rolling unit cuts the optimization method of water rubber and working roll contact - Google Patents
Secondary cold-rolling unit cuts the optimization method of water rubber and working roll contact Download PDFInfo
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- CN107900111A CN107900111A CN201711083168.3A CN201711083168A CN107900111A CN 107900111 A CN107900111 A CN 107900111A CN 201711083168 A CN201711083168 A CN 201711083168A CN 107900111 A CN107900111 A CN 107900111A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- 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
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/221—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by cold-rolling
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Abstract
A kind of secondary cold-rolling unit cuts the contact optimization method of water rubber and working roll, it includes the following steps：1st, the capital equipment and rolling technological parameter of secondary cold-rolling unit are collected；2nd, it is thick that rolling proparea strip steel at entry upper surface oil film thickness, the oil film of contact in rolling outlet top working roll surface attachment are calculated；3rd, the oil film thickness that rolling proparea strip lower surface separates out is calculated；4th, the impartial required rolling proparea bottom working roll surface attachment oil film thickness of strip upper and lower surface oil film thickness is calculated；5th, the contact of the impartial corresponding optimal incision water rubber of operation of rolling strip upper and lower surface oil film thickness and bottom working roll is calculated；6th, the contact of optimal incision water rubber and bottom working roll is exported.The present invention can optimize the contact for determining upper incision water rubber and working roll, realize secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness equalization, lift secondary cold-rolling unit greasy property and product surface quality.
Description
Technical field
The invention belongs to cold rolling technology field, more particularly to a kind of secondary cold-rolling unit cuts water rubber and pressure is contacted with working roll
The optimization method of power.
Background technology
Secondary cold-rolling refers to after the annealed processing of once cold rolling strip, carries out pressure again and is thinned, compared to traditional one
Secondary cold rolling, secondary cold-rolling product thickness is thin, intensity is high, therefore carries out rolling lubrication using emulsion direct-injection system.As shown in Figure 1
Secondary cold-rolling unit spraying rack and cut water rubber position view, DA, DB are the spray of secondary cold-rolling unit direct-injection system emulsion
Beam is penetrated, for spraying certain density emulsion to belt steel surface.CA, CB, CC be upper backup roll, intermediate calender rolls, working roll it is cold
But water injection beam, CD, CE, CF for bottom working roll, intermediate calender rolls, the cooling water spray beam of support roller, for upper working rolls and lower working rolls,
Intermediate calender rolls, support roller spray cooling water.Upper working rolls and lower working rolls after the first rack of secondary cold-rolling unit are provided with cutting water rubber, up and down
Water rubber is cut with certain pressure to be close on the work rolls, wherein on cut water rubber and be used to prevent from being sprayed on the cooling water droplet of upper roller system
Fall in strip upper surface, incision water rubber is used to prevent the cooling water of lower roll system to be splashed to strip lower surface, so as to ensure band
The spatter property of steel upper and lower surface.
In the secondary cold-rolling unit operation of rolling, emulsion is injected in the upper and lower surface of strip from DA and DB respectively, and
Before into roll gap certain thickness oil film is formed in belt steel surface.Belt steel surface attachment lubricating oil film can with strip together into
Enter in contact in rolling, play the role of lubrication between roll and strip.Oil film thickness between strip and roll from
Contact in rolling entrance to outlet during gradually it is thinning, finally in exit, a part of oil film is attached to belt steel surface, separately
It is a part of then be attached on work roll surface, and as the rotation of working roll is again introduced into rolling roll gap.Spray in order to prevent
Roller surface cooling water drippage or be splashed to belt steel surface and influence strip surface quality, cut water rubber with certain pressure with
Rotating work roll surface contact, this results in the oil film for cutting water rubber to being attached to lower work roller surface from deformed area outlet
The destruction of thickness.In addition, during secondary cold-rolling unit produced on-site, due to gravity, cause strip lower surface emulsion
Flow surplus ratio is less than strip upper surface emulsification flow quantity surplus ratio, during into roll gap deformed area, oil that strip lower surface separates out
Film thickness is less than the oil film thickness of strip upper surface.
The oil film thickness and the oil film thickness of work roll surface attachment that emulsion is separated out in belt steel surface are secondary cold rollings
The basis that group contact in rolling oil film is formed, directly determines the quality of deformed area greasy property in the operation of rolling.Wherein, strip
The oil film thickness that surface separates out mainly separates out the technological lubrication parameter institutes such as distance by emulsification flow quantity, concentration of emulsion used, emulsion
Determine, and the oil film thickness of roll gap inlet work roll surface attachment is then directly influenced be subject to cutting water rubber extent of the destruction.With
Past, research of the domestic and foreign scholars for secondary cold-rolling unit operation of rolling emulsion lubrication performance is concentrated mainly on to emulsifying liquid stream
Amount, concentration of emulsion used, emulsion separate out distance etc., adhere to oil film to secondary cold-rolling unit roller surface for cutting water rubber
Thickness, contact in rolling oil film thickness, the influence research of greasy property and product surface quality are less.In this way, how to divide
Analysis secondary cold-rolling unit cuts the basis of influence of the water rubber to work roll surface oil film thickness and contact in rolling greasy property
On, using strip upper and lower surface deformed area oil film thickness equalization is target in the operation of rolling, incision water rubber and working roll in optimization
Contact, the lifting to secondary cold-rolling unit rolling lubrication Properties Control, product surface quality is of great significance.
The content of the invention
It is an object of the invention to provide a kind of contact that can optimize incision water rubber and bottom working roll, realize two
The secondary cold-rolling unit of secondary cold mill complex operation of rolling strip upper and lower surface oil film thickness equalization cuts water rubber and working roll
The optimization method of contact.The present invention mainly cuts the contact of water rubber and working roll to work roll surface oil in analysis
On the basis of film thickness destructive rate influences, according to the contact that water rubber and top working roll are cut on secondary cold-rolling unit, with reference to
Secondary cold-rolling unit mill speed, emulsification flow quantity, concentration of emulsion used, emulsion separate out distance to contact in rolling oil film thickness
Influence, using secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness equalization as target, optimize determine up and down
Cut the contact of water rubber and working roll.
The present invention includes following step performed by computer：
(A) capital equipment and rolling technological parameter of secondary cold-rolling unit are collected, it includes：Emulsion flux density q, breast
Change flow quantity concentration C, emulsion separates out distance L, inlet of rolling mill mill speed V0, work roller speed VR, milling train outlet mill speed
V1, rolling nip angle α, entrance resistance of deformation K0, backward pull σ0, ROLLING OIL initial driving force viscosities il0, ROLLING OIL pressure-viscosity coefficient
θ, eduction rate hit influence coefficient lambdaz, eduction rate wetability influence coefficient lambdar, eduction rate time effects coefficient lambdat, strip upper surface
Surplus ratio flow effect coefficient δqs, strip upper surface surplus ratio time effects coefficient δts, strip lower surface surplus ratio flow effect
Coefficient δqx, strip lower surface surplus ratio time effects coefficient δtx, contact in rolling export roller surface attachment oil film ratio
kR, cut water rubber thickness hr, cut water rubber width br, on cut the contact pressure F of water rubber and top working rollrs, cut water rubber to work
Making roller surface attachment oil film destructive rate influences coefficient gamma.
(B) secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ is calculated2s, contact in rolling outlet on
The oil film thickness ξ of work roll surface attachment1Rs, comprise the following steps：
B1 the oil film thickness iterative value of secondary cold-rolling unit contact in rolling outlet top working roll surface attachment) is initializedAnd set iteration convergence precision ε；
B2 the oil film thickness ξ that secondary cold-rolling unit rolling proparea strip upper surface separates out) is calculated2Ss：
In formula, ηcFor concentration of emulsion used eduction rate；ηqsFlow quantity surplus ratio is emulsified for strip upper surface；
B3 secondary cold-rolling unit rolling proparea top working roll surface attachment oil film thickness ξ) is calculated2Rs：
In formula, ηrsAbove to cut water rubber to top working roll surface attachment oil film breakdown surplus ratio；
B4 secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ) is calculated2s：
ξ2s=ξ2Ss+ξ2Rs
B5 secondary cold-rolling unit contact in rolling outlet top working roll surface attachment oil film thickness ξ) is calculated1Rs：
In formula, kRAdhere to oil film ratio for contact in rolling export roller surface；
B6) judgeWhether set upIf so, then it is transferred to step B7)；If not, then makeIt is transferred to step B3)；
B7 secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ) is exported2s, contact in rolling outlet on
The oil film thickness ξ of work roll surface attachment1Rs。
(C) it is impartial according to secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness, make secondary cold rolling
Group rolling proparea strip lower surface oil film thickness ξ2x=ξ2s, contact in rolling outlet bottom working roll surface attachment oil film thickness ξ1Rx
=ξ1Rs。
(D) the oil film thickness ξ that secondary cold-rolling unit rolling proparea strip lower surface separates out is calculated2Sx：
In formula, ηcFor concentration of emulsion used eduction rate；ηqxFlow quantity surplus ratio is emulsified for strip lower surface.
(E) the impartial required secondary cold-rolling unit rolling proparea bottom working roll of strip upper and lower surface oil film thickness is calculated
Surface attachment oil film thickness ξ2Rx：
ξ2Rx=ξ2x-ξ2Sx
(F) the impartial corresponding optimal incision of secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness is calculated
The contact pressure F of water rubber and bottom working rollrx：
(G) contact pressure F of optimal incision water rubber and bottom working roll is exportedrx, complete secondary cold-rolling unit and cut water rubber
The contact of skin and working roll optimizes.
The present invention has the following advantages that compared with prior art：
According to the contact that water rubber and top working roll are cut on secondary cold-rolling unit, with reference to cutting water rubber and working roll
The influence that contact destroys work roll surface oil film thickness, optimizes the contact of incision water rubber and bottom working roll, real
Existing secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness is impartial, lifting secondary cold-rolling unit greasy property with
Product surface quality.
Brief description of the drawings
Fig. 1 is the total calculation flow chart of the present invention；
Fig. 2 is the calculation flow chart of step of the present invention (B).
Embodiment
Embodiment 1：
By taking certain secondary cold-rolling unit as an example, according to total calculation flow chart shown in Fig. 1：
First, in step (A), the capital equipment and rolling technological parameter of secondary cold-rolling unit are collected, including：Emulsion
Flux density q=10.5L/min/m, emulsification flow quantity concentration C=5.8%, emulsion separate out distance L=0.5m, inlet of rolling mill
Mill speed V0=706m/min, work roller speed VR=817m/min, milling train outlet mill speed V1=882m/min, rolling
Nip angle α=0.013rad, entrance resistance of deformation K0=320MPa, backward pull σ0=95MPa, ROLLING OIL initial driving force viscosities il0
=0.025Pas, ROLLING OIL pressure-viscosity coefficient θ=0.012MPa-1, eduction rate hit influence coefficient lambdaz=0.236, separate out
Rate wetability influences coefficient lambdar=0.675, eduction rate time effects coefficient lambdat=132.5, strip upper surface surplus ratio flow effect
Coefficient δqs=10.62, strip upper surface surplus ratio time effects coefficient δts=33.15, strip lower surface surplus ratio flow effect
Coefficient
δqx=15.98, strip lower surface surplus ratio time effects coefficient δtx=47.66, contact in rolling export roller
Surface attachment oil film ratio kR=0.60, water rubber thickness h is cutr=8.0mm, cut water rubber width br=1150mm, on cut water rubber
The contact pressure F of skin and top working rollrs=6000N, cut water rubber to work roll surface attachment oil film destructive rate coefficient gamma=
0.935MPa-1。
Then, as shown in Fig. 2, in step (B), secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film is calculated
Thickness ξ2s, contact in rolling outlet top working roll surface attachment oil film thickness ξ1Rs, comprise the following steps：
First, in step B1) in, the oil of initialization secondary cold-rolling unit contact in rolling outlet top working roll surface attachment
Film thickness iterative valueAnd set iteration convergence precision ε=0.001.
Then, in step B2) in, calculate the oil film thickness ξ that secondary cold-rolling unit rolling proparea strip upper surface separates out2Ss：
It is computed, ξ2Ss=0.215 μm；
Then, in step B3) in, calculate secondary cold-rolling unit rolling proparea top working roll surface attachment oil film thickness ξ2Rs：
Then, in step B4) in, calculate secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ2s：
ξ2s=ξ2Ss+ξ2Rs
Then, in step B5) in, it is thick to calculate secondary cold-rolling unit contact in rolling outlet top working roll surface attachment oil film
Spend ξ1Rs：
Then, in step B6) in, judgeSet up, be transferred to step B7)；
Then, in step B7) in, output secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ2s=
0.269 μm, the oil film thickness ξ of contact in rolling outlet top working roll surface attachment1Rs=0.994 μm.
Then, it is equal according to secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness in step (C)
Deng, make secondary cold-rolling unit roll proparea strip steel at entry lower surface oil film thickness ξ2x=0.269 μm, the lower work in contact in rolling outlet
Make the oil film thickness ξ of roller surface attachment1Rx=0.099 μm.
Then, in step (D), the oil film thickness ξ that secondary cold-rolling unit rolling proparea strip lower surface separates out is calculated2Sx：
It is computed, ξ2Sx=0.197 μm.
Then, in step (E), calculate the impartial required secondary cold-rolling unit of strip upper and lower surface oil film thickness and roll
Proparea bottom working roll surface attachment oil film thickness ξ processed2Rx=ξ2x-ξ2Sx=0.072 μm.
Then, in step (F), it is impartial to calculate secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness
The contact of corresponding optimal incision water rubber and bottom working roll
Finally, in step (G), the contact pressure F of optimal incision water rubber and bottom working roll is exportedrx=3313N,
Complete the contact optimization that secondary cold-rolling unit cuts water rubber and working roll.
As shown in table 1, it can be seen that the contact optimization method of water rubber and working roll is cut using secondary cold-rolling unit
After optimization, realize that secondary cold-rolling unit rolling proparea strip steel at entry upper and lower surface oil film thickness is impartial, be conducive to secondary cold-rolling production
The raising of product surface quality.
1 embodiment 1 of table is using the method for the present invention optimization front and back band steel upper and lower surface oil film thickness contrast
| Before optimization | After optimization | |
| On cut the contact of water rubber and top working roll | 6000N | 6000N |
| The contact of incision water rubber and bottom working roll | 6000N | 3313N |
| Roll proparea top working roll surface attachment oil film thickness | 0.054μm | 0.054μm |
| Roll proparea bottom working roll surface attachment oil film thickness | 0.050μm | 0.072μm |
| Roll proparea strip steel at entry upper surface oil film thickness | 0.269μm | 0.269μm |
| Roll proparea strip steel at entry lower surface oil film thickness | 0.247μm | 0.269μm |
Embodiment 2：
By taking certain secondary cold-rolling unit as an example, first, in step (A), the capital equipment of secondary cold-rolling unit is collected with rolling
Technological parameter processed, including：Emulsion flux density q=14.2L/min/m, emulsification flow quantity concentration C=6.6%, emulsification liquation
Go out distance L=0.5m, inlet of rolling mill mill speed V0=555m/min, work roller speed VR=778m/min, milling train outlet rolling
Speed V1=836m/min, rolling nip angle α=0.015rad, entrance resistance of deformation K0=285MPa, backward pull σ0=
101MPa, ROLLING OIL initial driving force viscosities il0=0.025Pa × s, ROLLING OIL pressure-viscosity coefficient θ=0.012MPa-1, eduction rate
Hitting influences coefficient lambdaz=0.236, eduction rate wetability influences coefficient lambdar=0.675, eduction rate time effects coefficient lambdat=
132.5th, strip upper surface surplus ratio flow effect coefficient δqs=10.62, strip upper surface surplus ratio time effects coefficient δts=
33.15th, strip lower surface surplus ratio flow effect coefficient δqx=15.98, strip lower surface surplus ratio time effects coefficient δtx=
47.66th, contact in rolling export roller surface attachment oil film ratio kR=0.60, water rubber thickness h is cutr=8.0mm, cut water
Rubber width br=1150mm, on cut water rubber and top working roll contact pressure Frs=5000N, cut water rubber to working roll table
Face attachment oil film destructive rate coefficient gamma=0.935MPa-1。
Then, in step (B), secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ is calculated2s, roll
The oil film thickness ξ of deformed area outlet processed top working roll surface attachment1Rs, comprise the following steps：
First, in step B1) in, the oil of initialization secondary cold-rolling unit contact in rolling outlet top working roll surface attachment
Film thickness iterative valueAnd set iteration convergence precision e=0.001.
Then, in step B2) in, calculate the oil film thickness ξ that secondary cold-rolling unit rolling proparea strip upper surface separates out2Ss：
It is computed, ξ2Ss=0.313 μm；
Then, in step B3) in, calculate secondary cold-rolling unit rolling proparea top working roll surface attachment oil film thickness ξ2Rs：
Then, in step B4) in, calculate secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ2s：
ξ2s=ξ2Ss+ξ2Rs
Then, in step B5) in, it is thick to calculate secondary cold-rolling unit contact in rolling outlet top working roll surface attachment oil film
Spend ξ1Rs：
Then, in step B6) in, judgeSet up, be transferred to step B7)；
Then, in step B7) in, output secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ2s=
0.395 μm, the oil film thickness ξ of contact in rolling outlet top working roll surface attachment1Rs=0.136 μm.
Then, it is equal according to secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness in step (C)
Deng, make secondary cold-rolling unit roll proparea strip steel at entry lower surface oil film thickness ξ2x=0.395 μm, the lower work in contact in rolling outlet
Make the oil film thickness ξ of roller surface attachment1Rx=0.136 μm.
Then, in step (D), the oil film thickness ξ that secondary cold-rolling unit rolling proparea strip lower surface separates out is calculated2Sx：
It is computed, ξ2Sx=0.278 μm；
Then, in step (E), calculate the impartial required secondary cold-rolling unit of strip upper and lower surface oil film thickness and roll
Proparea bottom working roll surface attachment oil film thickness ξ processed2Rx=ξ2x-ξ2Sx=0.116 μm.
Then, in step (F), it is impartial to calculate secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness
The contact of corresponding optimal incision water rubber and bottom working roll
Finally, in step (G), the contact pressure F of optimal incision water rubber and bottom working roll is exportedrx=1565N,
Complete the contact optimization that secondary cold-rolling unit cuts water rubber and working roll.
As shown in table 2, it can be seen that the contact optimization method of water rubber and working roll is cut using secondary cold-rolling unit
After optimization, realize that secondary cold-rolling unit rolling proparea strip steel at entry upper and lower surface oil film thickness is impartial, be conducive to secondary cold-rolling production
The raising of product surface quality.
2 embodiment 2 of table is using the method for the present invention optimization front and back band steel upper and lower surface oil film thickness contrast
| Before optimization | After optimization | |
| On cut the contact of water rubber and top working roll | 5000N | 5000N |
| The contact of incision water rubber and bottom working roll | 5000N | 1565N |
| Roll proparea top working roll surface attachment oil film thickness | 0.081μm | 0.081μm |
| Roll proparea bottom working roll surface attachment oil film thickness | 0.075μm | 0.117μm |
| Roll proparea strip steel at entry upper surface oil film thickness | 0.394μm | 0.394μm |
| Roll proparea strip steel at entry lower surface oil film thickness | 0.353μm | 0.394μm |
Claims (2)
1. a kind of secondary cold-rolling unit cuts the contact optimization method of water rubber and working roll, it is characterised in that：It include with
Under step performed by computer：
(A) capital equipment and rolling technological parameter of secondary cold-rolling unit are collected, including：Emulsion flux density q, emulsification liquid stream
Measure concentration C, emulsion separates out distance L, inlet of rolling mill mill speed V0, work roller speed VR, milling train outlet mill speed V1, roll
Nip angle α processed, entrance resistance of deformation K0, backward pull σ0, ROLLING OIL initial driving force viscosities il0, ROLLING OIL pressure-viscosity coefficient θ, analysis
Extracting rate, which is hit, influences coefficient lambdaz, eduction rate wetability influence coefficient lambdar, eduction rate time effects coefficient lambdat, strip upper surface it is remaining
Rate flow effect coefficient δqs, strip upper surface surplus ratio time effects coefficient δts, strip lower surface surplus ratio flow effect coefficient
δqx, strip lower surface surplus ratio time effects coefficient δtx, contact in rolling export roller surface attachment oil film ratio kR, cut water
Rubber thickness hr, cut water rubber width br, on cut the contact pressure F of water rubber and top working rollrs, cut water rubber to working roll table
Face attachment oil film destructive rate influences coefficient gamma；
(B) secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ is calculated2s, contact in rolling outlet on work
The oil film thickness ξ of roller surface attachment1Rs；
(C) it is impartial according to secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness, make secondary cold-rolling unit roll
Proparea strip lower surface oil film thickness ξ processed2x=ξ2s, contact in rolling outlet bottom working roll surface attachment oil film thickness ξ1Rx=
ξ1Rs；
(D) the oil film thickness ξ that secondary cold-rolling unit rolling proparea strip lower surface separates out is calculated2Sx：
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In formula, ηcFor concentration of emulsion used eduction rate；ηqxFlow quantity surplus ratio is emulsified for strip lower surface；
(E) the impartial required secondary cold-rolling unit rolling proparea bottom working roll surface of strip upper and lower surface oil film thickness is calculated
Adhere to oil film thickness ξ2Rx：
ξ2Rx=ξ2x-ξ2Sx；
(F) the impartial corresponding optimal incision water rubber of secondary cold-rolling unit operation of rolling strip upper and lower surface oil film thickness is calculated
The contact pressure F of skin and bottom working rollrx：
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<mi>F</mi>
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<mi>r</mi>
<mi>x</mi>
</mrow>
</msub>
<mo>=</mo>
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(G) contact pressure F of optimal incision water rubber and bottom working roll is exportedrx, complete secondary cold-rolling unit cut water rubber with
The contact optimization of working roll.
2. secondary cold-rolling unit according to claim 1 cuts the contact optimization method of water rubber and working roll, it is special
Sign is：The step (B) comprises the following steps：
B1 the oil film thickness iterative value of secondary cold-rolling unit contact in rolling outlet top working roll surface attachment) is initializedAnd
Set iteration convergence precision ε；
B2 the oil film thickness ξ that secondary cold-rolling unit rolling proparea strip upper surface separates out) is calculated2Ss：
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<mtr>
<mtd>
<mrow>
<msub>
<mi>&xi;</mi>
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</mfenced>
In formula, ηcFor concentration of emulsion used eduction rate；ηqsFlow quantity surplus ratio is emulsified for strip upper surface；
B3 secondary cold-rolling unit rolling proparea top working roll surface attachment oil film thickness ξ) is calculated2Rs：
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<mi>&xi;</mi>
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<mn>1</mn>
<mi>R</mi>
<mi>s</mi>
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<mo>*</mo>
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<mi>exp</mi>
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<msub>
<mi>F</mi>
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</mtable>
</mfenced>
In formula, ηrsAbove to cut water rubber to top working roll surface attachment oil film breakdown surplus ratio；
B4 secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ) is calculated2s：
ξ2s=ξ2Ss+ξ2Rs；
B5 secondary cold-rolling unit contact in rolling outlet top working roll surface attachment oil film thickness ξ) is calculated1Rs：
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In formula, kRAdhere to oil film ratio for contact in rolling export roller surface；
B6) judgeWhether set upIf so, then it is transferred to step B7)；If not, then makeTurn
Enter step B3)；
B7 secondary cold-rolling unit rolling proparea strip steel at entry upper surface oil film thickness ξ) is exported2s, contact in rolling outlet on work
The oil film thickness ξ of roller surface attachment1Rs。
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| CN110814047A (en) * | 2019-11-13 | 2020-02-21 | 燕山大学 | Method for compensating concentration of emulsion on lower surface of strip steel of DCR unit |
| CN110814046A (en) * | 2019-11-13 | 2020-02-21 | 燕山大学 | Flow compensation method for emulsion on lower surface of strip steel of DCR unit |
| CN111913452A (en) * | 2020-08-07 | 2020-11-10 | 武汉钢铁有限公司 | Automatic tundish baking system and method based on production rhythm control |
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| CN111913452A (en) * | 2020-08-07 | 2020-11-10 | 武汉钢铁有限公司 | Automatic tundish baking system and method based on production rhythm control |
| CN111913452B (en) * | 2020-08-07 | 2021-12-17 | 武汉钢铁有限公司 | Automatic tundish baking system and method based on production rhythm control |
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