CN107983772B - The method for building up of limited reliability meta-model in a kind of plate cold-rolled process - Google Patents
The method for building up of limited reliability meta-model in a kind of plate cold-rolled process Download PDFInfo
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- CN107983772B CN107983772B CN201711209282.6A CN201711209282A CN107983772B CN 107983772 B CN107983772 B CN 107983772B CN 201711209282 A CN201711209282 A CN 201711209282A CN 107983772 B CN107983772 B CN 107983772B
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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
- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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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
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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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
- 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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- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
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- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
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- Computer Hardware Design (AREA)
- Mechanical Engineering (AREA)
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- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
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Abstract
The present invention provides a kind of method for building up of limited reliability meta-model in plate cold-rolled process, belong to limit element artificial module modeling field.Finite element modeling method described in the invention is based on actual cold-rolling process, it establishes plate rolling process finite element model and is carried according to the roll-force of practical cold-rolled process and proofreaded under different reduction ratios, to establish limit element artificial module that is targeted, can reflect practical cold-rolled process, achieve the purpose that application of the finite element simulation in plate cold-rolled process.
Description
Technical field
The invention belongs to limit element artificial module modeling technique fields, more particularly, to reliable in a kind of plate cold-rolled process
The method for building up of property finite element model.
Background technique
Cold-rolled steel sheet is widely used in the key of each national product such as aviation, electric power, automobile, building, industrial equipment
Field belongs to the steel products of high added value.In terms of the developing history for rolling panel products, cold-strip steel is on the basis of hot-strip
On grow up, and have the tendency that gradually replacing hot-strip, this is because cold-strip steel overcomes hot-strip plate thickness
The shortcomings such as low precision, surface oxidation are serious, energy consumption is big, good product performance, wide in variety, purposes is extremely wide.
In recent years, the application with FEM Numerical Simulation in the industry, FEM Numerical Simulation are also right to a certain extent
Cold-rolling process design provides certain reference, but the consistency and its guidance to test of FEM Numerical Simulation and test
Property there is also many problems, the regular result that finite element simulation can only be combined to obtain based on current knowhow be work
Skill design provides certain reference in limited range.
So foundation can in order to achieve the purpose that reduce debug time using FEM Numerical Simulation, save production cost
It is the precondition of the design of finite element result Instructing manufacture and process analysis by property FEM simulation model.
Summary of the invention
In view of this, the present invention is directed to propose in a kind of plate cold-rolled process limited reliability meta-model method for building up,
To improve the accuracy of FEM Numerical Simulation.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
The method for building up of limited reliability meta-model, includes the following steps: in a kind of plate cold-rolled process
1) processed plate is subjected to cold rolling trials, obtains the rolling force curve under at least two reduction ratios, and determined steady
The reduction ratio curve for determining rolling sequence obtains Experimental Rolling power average value curve, rolls front and back plate THICKNESS CALCULATION according to measurement
Reduction ratio R1 and R2 out；
2) finite element emulation software DEFORM3D is utilized, the finite element model that reduction ratio is the cold-rolled process under R1 is established,
It is if being processed sheet deformation resistance formulaσ=Kε n, model is resisted as deformation, whereinσFor the stress in deformation process,εTo become
Strain during shape, K are resistance of deformation, and n is processing hardening value, and K value, n value use initial value K0、n0；According to cold rolling trials
Rolling parameter uniform limit member rolling parameter runs calculation procedure；
3) as n=n0When, K value is set as with K0On the basis of value float up and down a certain range, if defining K value floating spacers, operation
The corresponding finite element model of reduction ratio R1 obtains stroke-curve of load when different K values；As K=K0When, n value is set as with n0
On the basis of value float up and down a certain range, set n value floating spacers, the corresponding finite element model of operation reduction ratio R1, acquisition is not
With stroke-curve of load when n value；
4) stroke-curve of load under different K values is taken into the stable rolling stage and seeks roll-force average valueF avg , make
Average valueF avg With K value change curve, it is denoted asF avg-K , willF avg-K The average roll-force fitting obtained with cold rolling trials finds out two
The corresponding K of intersections of complex curve1With n1Value；
5) stroke-curve of load when by different n values takes the stable rolling stage and seeks roll-force average value Favg, makes
Average roll-forceF avg With n value change curve, be denoted as byF avg-n WithF avg Fitting finds out the corresponding K of two intersections of complex curve2With n2Value,
It willF avg-n WithF avg Fitting finds out the corresponding K of two intersections of complex curve2With n2Value；
6) by K1With n1Value, K2With n2Value brings deformation resistance formula into respectivelyσ=Kε n, obtainσ=K1 ε n1Withσ=K2 ε n2, willσ=
K1 ε n1Withσ=K2 ε n2Substituting into reduction ratio as deformation resistance formula is R2Finite element model in, other conditions are constant, run program；
Finite element is acquired into average roll-forceF avg-K1 、F avg-K2 Force curve is averagely rolled with testF avg-R2 Compare, analog result is quilt
It processes plate and resists formula in the test deformation for rolling upper cold-rolled process, acquired result is deformed closer to true value with this
Resistance formula corrects finite element model.
Further, the K value, n value initial value can by be processed plate true stress-true strain curve matching institute
?.
Compared with the existing technology, present invention has the advantage that
The present invention is based on actual cold-rolling process, establish plate rolling process finite element model and according to practical cold rolling
The roll-force of process carries is proofreaded under different reduction ratios, so that foundation is targeted, can reflect practical cold-rolled process
Limit element artificial module achievees the purpose that application of the finite element simulation in plate cold-rolled process.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is cold-rolled process of embodiment of the present invention finite element model (1/2 model)；
Fig. 2 is rolling force curve of the embodiment of the present invention as n=0.33 under different value of K and the (pressure of Experimental Rolling force curve
Rate=55%).
Fig. 3 is K value-rolling force curve (reduction ratio=55%) as n=0.33 of the embodiment of the present invention.
Fig. 4 is rolling force curve (reduction ratio=55%) of the embodiment of the present invention as K=600 under difference n value.
Fig. 5 is n value-rolling force curve (reduction ratio=55%) as K=600 of the embodiment of the present invention.
K value-n value-Favg curve graph when Fig. 6 is R of the embodiment of the present invention=55%.
Fig. 7 is that deformation of the embodiment of the present invention is resistedσ=620.5ε 0.33Withσ=600ε 0.17Roll-force obtained by finite element simulation with
Test result compares (reduction ratio=40%).
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It is Q235 that plate is processed used in the present embodiment, and the trus stress-for being processed plate is obtained by uniaxial tensile test
Strain curve, and be fitted to obtainσ=480ε 0.33；
Rolling force curve, rolling parameter are obtained by Q235 plate cold rolling trials are as follows: Q235 strip width is 50mm, thickness
2.9mm, outgoing gauge 1.3mm, reduction ratio 55%, mill speed 0.05m/s, roller diameter 110mm.Wherein, it rolls
Curve takes the stable rolling stage to compare for finite element result.
Limited reliability member simulation model is established, is mainly included the following steps:
(1) as shown in Figure 1, establishing the finite element model of cold-rolled process, plate using finite element emulation software DEFORM3D
Deforming resistance formula isσ=Kε n, wherein K is resistance of deformation, and n is processing hardening value, and K, n value is ginseng with tension test fitting result
According to being respectively set as K=480MPa, n=0.33, and the physical characteristics of materials such as input flexibility modulus, Poisson's ratio are joined in material depot
Number；It is thick that plate is processed according to the rolling parameter uniform limit member rolling parameter of cold rolling trials, including before dimension of roller, rolling
Degree, reduction ratio R are 55%, roll mill speed equidimension parameter, and coefficient of friction is set as according to dry friction coefficient between metal
0.08, it sets the boundary condition of cold rolling model and runs calculation procedure；
(2) as n=0.33, K value is respectively set as 450-750, and interval of values 50 is separately operable program, obtains each K
Rolling force curve (as shown in Fig. 2, longest curve is Experimental Rolling force curve in figure) under value, takes the flat of stable rolling stage
Mean value Favg makes K value-rolling force curve (as shown in Figure 3), from the figure 3, it may be seen that as n=0.33, when K=600, and gained rolling
Force curve matches with test；
(3) likewise, as K=600, n value is respectively set as 0.2-0.5, and interval of values 0.05 is separately operable program
Afterwards, the rolling force curve (as shown in Figure 4) under different n values is obtained, the average value Favg in stable rolling stage is taken, n value-is made and rolls
Force curve (as shown in Figure 5) processed, and K value-rolling force curve obtained by step (2) is combined, obtain K value-n value-Favg curve graph (such as
Shown in Fig. 6)；
(4) K value-is averaged roll-force curve-fitting results as shown in formula (2):
K=0.5972F+4.7615 (2)
N value-is averaged roll-force curve-fitting results as shown in formula (3):
N=- 0.0035F+3.7781 (3)
Average rolling force F=1031kN that cold rolling trials obtain is substituted into formula (2) and (3) curve obtained respectively, and is solved
To: K is about that 620.5, n is about 0.17；I.e. as n=0.33, K is about 620.5, and as K=600, n is about 0.17, the most with experiment
It is close；It finally obtains:σ=620.5ε 0.33,σ=600ε 0.17；
(5) solution obtained by step (4) is substituted into finite element model as deformation resistance formula, reduction ratio R is adjusted to 40%,
The cold rolling trials of the roll-force as obtained by finite element simulation and same reduction ratio 40% roll-force that is averaged is compared, (such as Fig. 7 institute
Show) know that working as deformation resistance value isσ=620.5ε 0.33When, finite element gained roll-force and test degree of agreement are higher.
The method of the present invention is realized suitable for comparative test by the multiple comparison of finite element result and test result with four
The foundation of roller reversable cold-rolling machine finite element model.
For same material when using different cold-rolling mills, available the method carries out the correction of model, so that establishing has
Targetedly limited reliability member simulation model.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (2)
1. the method for building up of limited reliability meta-model in a kind of plate cold-rolled process, it is characterised in that include the following steps:
1) processed plate is subjected to cold rolling trials, obtains the rolling force curve under at least two reduction ratios, and determine that stabilization is rolled
The reduction ratio curve in stage processed obtains testing average rolling force curve, rolls front and back plate THICKNESS CALCULATION according to measurement and goes out to depress
Rate R1 and R2；
2) finite element emulation software DEFORM3D is utilized, the finite element model that reduction ratio is the cold-rolled process under R1 is established, if by
Processing sheet deformation resists formulaσ=Kε n, model is resisted as deformation, whereinσFor the stress in deformation process,εTo deform
Strain in journey, K are resistance of deformation, and n is processing hardening value, and K value, n value use initial value K0、n0；According to the rolling of cold rolling trials
Parameter uniform limit member rolling parameter runs calculation procedure；
3) as n=n0When, K value is set as with K0On the basis of value float up and down a certain range, if defining K value floating spacers, operation pressure
The corresponding finite element model of rate R1 obtains stroke-curve of load when different K values；
4) stroke-curve of load under different K values is taken into the stable rolling stage and seeks roll-force average valueF avg , make average
Roll-forceF avg With K value change curve, it is denoted asF avg-K , willF avg-K The average roll-force fitting obtained with cold rolling trials finds out two
The corresponding K of line intersection point1With n1Value；
5) as K=K0When, n value is set as with n0On the basis of value float up and down a certain range, set n value floating spacers, operation is depressed
The corresponding finite element model of rate R1 obtains stroke-curve of load when different n values；
Stroke-curve of load when by different n values takes the stable rolling stage and seeks roll-force average valueF avg , make average valueF avg With n value change curve, be denoted as byF avg-n , willF avg-n The average roll-force fitting obtained with cold rolling trials finds out two lines and hands over
The corresponding K of point2With n2Value；
6) by K1With n1Value, K2With n2Value brings deformation resistance formula into respectivelyσ=Kε n, obtainσ=K1 ε n1Withσ=K2 ε n2, willσ=K1 ε n1
Withσ=K2 ε n2Substituting into reduction ratio as deformation resistance formula is R2Finite element model in, other conditions are constant, run program；To have
Limit member acquires average roll-forceF avg-K1 、F avg-K2 Force curve is averagely rolled with testF avg-R2 Compare, analog result is to be processed
Plate resists formula in the test deformation for rolling upper cold-rolled process, and acquired result deforms resistance closer to true value, with this
Formula corrects finite element model.
2. the method for building up of limited reliability meta-model, feature in a kind of plate cold-rolled process according to claim 1
Be: the K value, n value initial value can be by being processed obtained by the true stress-true strain curve matching of plate.
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| CN113569443B (en) * | 2021-06-29 | 2023-08-22 | 河钢股份有限公司 | Multi-frame cold continuous rolling plate shape finite element simulation method |
| CN117350105B (en) * | 2023-09-22 | 2024-03-22 | 河北工程大学 | Method for correcting and checking data in consideration of bulging in metal compression experiment |
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|---|---|---|---|---|
| US3882709A (en) * | 1972-10-16 | 1975-05-13 | Nippon Steel Corp | Method for controlling the profile of workpieces on rolling mills |
| CN1190220A (en) * | 1996-10-29 | 1998-08-12 | 摩根建社公司 | System and method of optimizing rolling mill roll inventory |
| EP1491268A2 (en) * | 2003-06-25 | 2004-12-29 | ABB PATENT GmbH | Method for cold rolling metal strip |
| CN104376424A (en) * | 2014-11-27 | 2015-02-25 | 东北大学 | Coordinating and dispatching method for steel coils of multiple production lines in iron and steel enterprise cold rolling area |
| CN106964654A (en) * | 2016-11-07 | 2017-07-21 | 南阳师范学院 | A kind of modeling and simulation method for solving roll-force |
| CN107066737A (en) * | 2017-04-14 | 2017-08-18 | 北京科技大学 | A kind of two-dimentional staggered difference method for predicting hot rolling process plate belt temperature field |
-
2017
- 2017-11-27 CN CN201711209282.6A patent/CN107983772B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3882709A (en) * | 1972-10-16 | 1975-05-13 | Nippon Steel Corp | Method for controlling the profile of workpieces on rolling mills |
| CN1190220A (en) * | 1996-10-29 | 1998-08-12 | 摩根建社公司 | System and method of optimizing rolling mill roll inventory |
| EP1491268A2 (en) * | 2003-06-25 | 2004-12-29 | ABB PATENT GmbH | Method for cold rolling metal strip |
| CN104376424A (en) * | 2014-11-27 | 2015-02-25 | 东北大学 | Coordinating and dispatching method for steel coils of multiple production lines in iron and steel enterprise cold rolling area |
| CN106964654A (en) * | 2016-11-07 | 2017-07-21 | 南阳师范学院 | A kind of modeling and simulation method for solving roll-force |
| CN107066737A (en) * | 2017-04-14 | 2017-08-18 | 北京科技大学 | A kind of two-dimentional staggered difference method for predicting hot rolling process plate belt temperature field |
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