CN108687139A - One kind is suitable for rolling stability check method under the conditions of secondary cold-rolling unit small deformation - Google Patents
One kind is suitable for rolling stability check method under the conditions of secondary cold-rolling unit small deformation Download PDFInfo
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- CN108687139A CN108687139A CN201810345233.3A CN201810345233A CN108687139A CN 108687139 A CN108687139 A CN 108687139A CN 201810345233 A CN201810345233 A CN 201810345233A CN 108687139 A CN108687139 A CN 108687139A
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- rolling
- reduction ratio
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
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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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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
- G07C3/005—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles during manufacturing process
Abstract
The invention discloses one kind to be suitable for rolling stability check method under the conditions of secondary cold-rolling unit small deformation, on the basis of in laboratory, milling train experiment is studied with deformation technique, in conjunction with stable rolling factor analysis achievement in research, to related optimisation technique, for the ideal format steel grade for needing small deformation to roll, with its minimum object function of stable rolling deflection, do not occur skid, Jumping phenomenons be constraints, secondary cold-rolling unit small deformation stable rolling ability is checked.Under the premise of ensureing slip factor, rolling stress in tolerance band, the minimum value of reduction ratio ε values is obtained by optimizing.
Description
Technical field
The present invention relates to stability check side is rolled under the conditions of cold rolling field more particularly to a kind of secondary cold-rolling unit small deformation
Method.
Background technology
In cold continuous rolling production process, for cold mill complex, rolling stability check is more next under the conditions of different distortion
It is more important.Mainly there are roller technology Research on Parameters Optimization, rolling for the stability study of secondary cold-rolling unit small deformation
Research that process parameter optimizing technical research, milling train overall stiffness curve influence rolling stability, AGC control technologies are to rolling
The research of stability influence, when big for secondary cold-rolling unit deflection, draught pressure and advancing slip value are all larger, need using small
The working roll of roughness, to reduce roll gap friction coefficient, and for secondary cold-rolling unit deflection hour, draught pressure is less than normal,
It rolls unstable, the working roll using large roughness is needed, to improve roll gap friction coefficient, therefore not based on secondary cold-rolling unit
With the respective demand to roller technology parameter of product of deflection, find respectively the roller diameter of operation roll of mill, roughness it is optimal
Value, when realizing that the optimization of the roller technology parameter of the stable rolling of secondary cold-rolling unit is big for secondary cold-rolling unit deflection,
Draught pressure and advancing slip value are all larger, need to adjust rolling technological parameter towards the direction for reducing roll-force and advancing slip value, and right
In secondary cold-rolling unit deflection hour, draught pressure is less than normal, and rolling is unstable, needs to adjust towards the direction for improving roll-force
Rolling technological parameter, therefore the product based on secondary cold-rolling unit different distortion amount divides respectively to the demand of rolling technological parameter
Front and back tension and mill speed the rolling work of the stable rolling of secondary cold-rolling unit Tiao Zheng not be realized to optimal value in the operation of rolling
The optimization of skill parameter.The method being combined is tested with experimental mill using field test tracking, studies the steady of secondary cold-rolling unit
Determine the relationship between rolling power and milling train overall stiffness curve.The research that AGC control technologies influence rolling stability in order to
Ensure rolling stability of the secondary cold-rolling unit under small deformation amount, i.e., draught pressure, advancing slip value are in tolerance band, in its original
On the basis of some rollings, lubrication and roller technology system, spy utilizes rolling technological parameter, roller technology under above-mentioned small deformation amount
Parameter and the optimisation technique of emulsion technological parameter carry out complex optimum to a whole set of technological parameter of secondary cold-rolling unit, will
Theory is connected with actual production, with obvious effects.
Invention content
It is a kind of with the minimum object function of stable rolling deflection present invention aims at providing, do not occur to skid,
Jumping phenomenons are the rolling stability check method under the conditions of being suitable for secondary cold-rolling unit small deformation of constraints.
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 cold mill complex;
Step b defines reduction ratio ε, maximum depression rate εmin, initialize ε0=10%, give the setting step delta of reduction ratio
ε;
Step c, initialization reduction ratio pilot process parameter kε=0;
Step d calculates reduction ratio ε=ε0-kε·Δε;
Step e calculates friction coefficient μ under current working, show that its computation model is by following formula:
In formula:A, which is fluid friction, influences coefficient;B, which is dry friction, influences coefficient;BξFor friction coefficient damped expoential;ξ02For
Gloss level of roll depends on the practical roughness of roll to oil film thickness influence amount;ξ01Dynamic oil film when being rolled for smooth roll
Thickness
In formula:ε is reduction ratio;h0It is inlet of rolling mill belt steel thickness;KmAverage deformation drag;σ0For unit backward pull, kcFor
Concentration of emulsion used influences coefficient;θ is the viscosity compressed coefficient of emulsion;ψ, which is lubricating oil film speed, influences coefficient,Wherein V is mill speed;The elastic flattening radius of working roll
Step f calculates rolling stress p under current working1, slip factor ψ;Rolling stress p1=P/ (Bl);
Slip factor
Step g, inequalitykσCoefficient is influenced for equivalent tension, judges whether inequality is true;
If set up, k is enabledε=kε+ 1, it is transferred to step d;Otherwise, directly it is transferred to step h;
Step h exports minimum reduction ratio εmin=ε completes the check of secondary cold-rolling unit small deformation stable rolling ability.
Further, in step a, the equipment and technology parameter of cold mill complex is collected;Include the following steps:
Step a1 collects the roller technology parameter of cold mill complex, including:Working roll radius R, initial surface roughness Rar0,
The elastic modulus E of working roll, the Poisson's ratio ν of working roll;
Step a2 collects cold mill complex correlation rolling technological parameter, including:The average deformation drag K of bandmIt is strong with surrender
Spend σs, the width B of band, supplied materials thickness h0, normal mill speed V, draught pressure setting value P, unit forward pull σ1, unit
Backward pull σ0;
Step a3, collection process lubricating regime parameter, including:Concentration of emulsion used c, initial temperature t0, flow w, emulsion
Dynamic viscosity η, compressed coefficient θ;
Step a4 collects the technology characteristics parameter of cold mill complex, including:The maximum draught pressure P of license*, before critical maximum
Sliding value S*。
Compared with prior art, the method for the present invention has the following advantages that:
1, the check of secondary cold-rolling unit small deformation stable rolling ability is realized, it can be effectively and timely to secondary cold
Milling train group small deformation stable rolling ability is checked.
2, in order to ensure that secondary cold-rolling unit draught pressure, advancing slip value under small deformation amount avoid in tolerance band
It is unstable to occur rolling in cold-rolled process when small deformation, milling train is caused to occur rolling uneven, bad performance of template appearance etc..It is real
Row stability is checked, and is helped to milling train problem adjust and solve in time, is effectively avoided the occurrence of greater loss, covert to improve
The benefit of manufacturing enterprise.
Description of the drawings
Fig. 1 is the flow chart of the method for the present invention.
Specific implementation mode
1 the present invention will be further described below in conjunction with the accompanying drawings:
Embodiment 1
As shown in Figure 1, the step of the method for the present invention, is as follows:
(a) capital equipment and technological parameter for collecting cold mill complex, mainly include the following steps that:
A1) collect cold mill complex roller technology parameter, include mainly:Working roll radius R=107.5mm, initial surface
Roughness Rar0=0.75, elastic modulus E=217 × 9.806 of working roll, working roll Poisson's ratio ν=0.3;
A2 cold mill complex correlation rolling technological parameter) is collected, master has:The average deformation drag K of bandm=475MPa and bend
Take intensity σsThe thickness h of=240MPa, the width B=966mm of band, supplied materials0=0.275mm, normal mill speed v=453m/
Min, draught pressure setting value P=1000kN, forward pull σ1=129MPa, backward pull σ0=79MPa;
A3) collection process lubricating regime parameter includes mainly:Concentration of emulsion used c=2.3% initial temperatures t0=58.7
DEG C, dynamic viscosity η=0.016Pa.s of flow w=22.0L/min, emulsion, compressed coefficient θ=0.01;
A4) collect cold mill complex technology characteristics parameter, include mainly:The maximum draught pressure P of license*=
4899.574kN critical maximum is advancing slip value S*=0.1499mm;
(b) reduction ratio ε, minimum reduction ratio ε are definedmin, initialize ε0=10%, give reduction ratio setting step delta ε=
0.1%;
(c) initialization reduction ratio pilot process parameter kε=0;
(d) reduction ratio ε=ε is calculated0-kεΔ ε=10%;
(e) friction coefficient under current working is calculated;
(f) rolling stress p under current working is calculated1=P/ (Bl)=240.586kN, slip factor
(g) judge inequality(k is taken by experienceσ=1.6) it sets up, then enables kε=kε+ 1=1 turns
Enter step (d);Give kεAssignment is transferred to step (h) until inequality is invalid;
(h) minimum reduction ratio ε is finally exportedmin=ε=4.1% completes secondary cold-rolling unit small deformation stable rolling ability
Check.
Embodiment 2
(a) capital equipment and technological parameter for collecting cold mill complex, mainly include the following steps that:
A1) collect cold mill complex roller technology parameter, include mainly:Working roll radius R=90mm, initial surface are coarse
Spend Rar0=0.75, elastic modulus E=217 × 9.806 of working roll, working roll Poisson's ratio ν=0.3;
A2 cold mill complex correlation rolling technological parameter) is collected, master has:The average deformation drag K of bandm=475MPa and bend
Take intensity σsThe thickness h of=240MPa, the width B=1050mm of band, supplied materials0=0.185mm, normal mill speed v=
360m/min, draught pressure setting value P=1260kN, forward pull σ1=138MPa, backward pull σ0=69MPa;
A3) collection process lubricating regime parameter includes mainly:Concentration of emulsion used c=1.8% initial temperatures t0=55 DEG C,
Flow w=22.0L/min, dynamic viscosity η=0.016Pa.s of emulsion, compressed coefficient θ=0.01;
A4) collect cold mill complex technology characteristics parameter, include mainly:The maximum draught pressure P of license*=
4899.574kN critical maximum is advancing slip value S*=0.1499mm;
(b) reduction ratio ε, minimum reduction ratio ε are definedmin, initialize ε0=10%, give reduction ratio setting step delta ε=
0.1%;
(c) initialization reduction ratio pilot process parameter kε=0;
(d) reduction ratio ε=ε is calculated0-kεΔ ε=10%;
(e) friction coefficient under current working is calculated;
(f) rolling stress p under current working is calculated1=P/ (Bl)=235.35kN, slip factor
(g) judge inequality(k is taken by experienceσ=1.6) it sets up, then enables kε=kε+ 1=1 turns
Enter step (d);Give kεAssignment is transferred to step (h) until inequality is invalid;
(h) minimum reduction ratio ε is finally exportedmiN=ε=5.6% completes secondary cold-rolling unit small deformation stable rolling ability
Check.
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. one kind is suitable for rolling stability check method under the conditions of secondary cold-rolling unit small deformation, which is characterized in that the method
Include the following steps:
Step a collects the equipment and technology parameter of cold mill complex;
Step b defines reduction ratio ε, maximum depression rate εmin, initialize ε0=10%, give the setting step delta ε of reduction ratio;
Step c, initialization reduction ratio pilot process parameter kε=0;
Step d calculates reduction ratio ε=ε0-kε·Δε;
Step e calculates friction coefficient μ under current working, show that its computation model is by following formula:
In formula:A, which is fluid friction, influences coefficient;B, which is dry friction, influences coefficient;BξFor friction coefficient damped expoential;ξ02For roll
Roughness depends on the practical roughness of roll to oil film thickness influence amount;ξ01Dynamic oil film thickness when being rolled for smooth roll
In formula:ε is reduction ratio;h0It is inlet of rolling mill belt steel thickness;KmAverage deformation drag;σ0For unit backward pull, kcFor emulsification
Liquid concentration influences coefficient;θ is the viscosity compressed coefficient of emulsion;ψ, which is lubricating oil film speed, influences coefficient,Its
Middle V is mill speed;The elastic flattening radius of working roll
Step f calculates rolling stress p under current working1, slip factor ψ;Rolling stress p1=P/ (Bl);
Slip factor
Step g, inequalitykσCoefficient is influenced for equivalent tension, judges whether inequality is true;If
It sets up, then enables kε=kε+ 1, it is transferred to step d;Otherwise, directly it is transferred to step h;
Step h exports minimum reduction ratio εmin=ε completes the check of secondary cold-rolling unit small deformation stable rolling ability.
2. a kind of rolling stability check method under the conditions of being suitable for secondary cold-rolling unit small deformation according to claim 1,
It is characterized in that, in step a, the equipment and technology parameter of cold mill complex is collected;Include the following steps:
Step a1 collects the roller technology parameter of cold mill complex, including:Working roll radius R, initial surface roughness Rar0, work
The elastic modulus E of roller, the Poisson's ratio ν of working roll;
Step a2 collects cold mill complex correlation rolling technological parameter, including:The average deformation drag K of bandmWith yield strength σs,
The width B of band, the thickness h of supplied materials0, normal mill speed V, draught pressure setting value P, unit forward pull σ1, unit backward pull
σ0;
Step a3, collection process lubricating regime parameter, including:Concentration of emulsion used c, initial temperature t0, flow w, emulsion power
Viscosities il, compressed coefficient θ;
Step a4 collects the technology characteristics parameter of cold mill complex, including:The maximum draught pressure P* of license, value that critical maximum is advancing slip
S*。
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| CN201810345233.3A CN108687139B (en) | 2018-04-17 | 2018-04-17 | Rolling stability checking method suitable for secondary cold rolling unit under small deformation condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345233.3A CN108687139B (en) | 2018-04-17 | 2018-04-17 | Rolling stability checking method suitable for secondary cold rolling unit under small deformation condition |
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| CN108687139A true CN108687139A (en) | 2018-10-23 |
| CN108687139B CN108687139B (en) | 2020-02-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927261A (en) * | 2010-01-02 | 2010-12-29 | 燕山大学 | Method for comprehensively optimizing process lubrication system of secondary cold rolling unit in rolling mode |
| CN102744268A (en) * | 2012-07-03 | 2012-10-24 | 中冶南方（武汉）信息技术工程有限公司 | Method for confirming depressurizing distribution of single-rack reversible cold-rolling mill |
| CN103406361A (en) * | 2013-08-05 | 2013-11-27 | 苏州有色金属研究院有限公司 | Aluminum cold-rolling mill rolling schedule generation method based on material states and parameter curves |
| CN106909723A (en) * | 2017-02-16 | 2017-06-30 | 燕山大学 | Cold-rolled process emulsifies flow quantity and mill speed relation curve Optimal Setting method |
-
2018
- 2018-04-17 CN CN201810345233.3A patent/CN108687139B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101927261A (en) * | 2010-01-02 | 2010-12-29 | 燕山大学 | Method for comprehensively optimizing process lubrication system of secondary cold rolling unit in rolling mode |
| CN102744268A (en) * | 2012-07-03 | 2012-10-24 | 中冶南方（武汉）信息技术工程有限公司 | Method for confirming depressurizing distribution of single-rack reversible cold-rolling mill |
| CN103406361A (en) * | 2013-08-05 | 2013-11-27 | 苏州有色金属研究院有限公司 | Aluminum cold-rolling mill rolling schedule generation method based on material states and parameter curves |
| CN106909723A (en) * | 2017-02-16 | 2017-06-30 | 燕山大学 | Cold-rolled process emulsifies flow quantity and mill speed relation curve Optimal Setting method |
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