CN106513613A - Online heat width modulation method for slab continuous casting crystallizer based on parabolic path - Google Patents
Online heat width modulation method for slab continuous casting crystallizer based on parabolic path Download PDFInfo
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- CN106513613A CN106513613A CN201611226381.0A CN201611226381A CN106513613A CN 106513613 A CN106513613 A CN 106513613A CN 201611226381 A CN201611226381 A CN 201611226381A CN 106513613 A CN106513613 A CN 106513613A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/168—Controlling or regulating processes or operations for adjusting the mould size or mould taper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls
Abstract
The invention provides an online heat width modulation method for a continuous casting crystallizer based on a parabolic path The online heat width modulation method comprises the following steps that (1), the parabolic width modulation path x (y) is pre-generated; (2), the upper end of the narrow edge and the lower end of the narrow edge both operate from the corresponding initial points according to the corresponding parabolic width modulation path x (y); (3), the upper end of the narrow side and the lower end of the narrow edge both arrive at the target positions, and the width modulation process is completed, wherein y represents the length of a transition wedge-shaped slab; the upper end of the narrow edge operates from the initial point xt0 according to the formula that x is equal to xt0 + x (y); and the lower end of the narrow edge operates from the initial point xb0 according to the formula that x is equal to xb0 + x (y-h), wherein h represents the effective height of the crystallizer. By the adoption of the online heat width modulation method for the continuous casting crystallizer based on the parabolic path, quick online width modulation of the crystallizer under the full-pull-speed condition can be achieved, the requirement of the cast slab on the width specification change is met, and meanwhile the bleed-out risk caused by the cast slab defect caused by excessive extrusion to a cast slab shell by a narrow-edge copper plate of the crystallizer or the overlarge air gap of the narrow-edge copper plate and the cast slab shell in the width modulation process is avoided.
Description
Technical field
The invention belongs to metallurgical continuous casting field, more particularly to a kind of continuous cast mold based on parabolic path is warm online
Width adjusting method.
Background technology
In the production line of molten steel direct casting, in order to meet the needs of different in width slab, crystallizer width must be with
The width of slab and adjust.Traditional width adjusting method is to interrupt production to change section, and every conticaster stops every year because changing section
Over one hundred time of machine, affects the tens thousand of tons of yield, direct economic benefit to lose up to ten million units.How user small lot, many specification are adapted to
Product demand becomes iron and steel enterprise's important topic.The hot width control technology of crystallizer arises at the historic moment, and this technique avoids traditional replacing
Crystallizer, secondary opening pour the raw material and the loss of time for bringing, and improve utilization rate of equipment and installations, recovery rate of iron, reduce production
Cost, is the core technology of industry highest attention.
When crystallizer carries out heat tune width, under strip steel water condition, the narrow side of movement changes strand width specifications, excessive extruding meeting
The defect such as crack, excessive air gap affects solidification and the uniformity of green shell, causes bleed-out when serious, and technical difficulty is high, wind
Danger is big.The technology is monopolized for a long time by first-class project company of the foreign countries such as VAI, Nippon Steel, Da Nieli always, seriously constrains me
The competitiveness in the international market of the development of state's continuous casting process and control technology and engineering technology company of China in continuous-casting art.
Patent CN102294455A discloses a kind of cast high speed minor face that do not stop of slab caster mould and adjusts width side
Method, patent CN102240783A, CN102240783A, CN102240788A etc. disclose the crystallizer width of different range to be increased
Or the method for reducing.Such method adjusts the relatively complicated complexity of design of broad gauge mark, and is unfavorable for adjusting wide control, therefore is difficult in reality
It is able to apply and promote in engineering project.
With the development of continuous casting process, the online hot width control technology of crystallizer has been increasingly becoming continuous casting system standard configuration technology, because
This, a kind of hot width control technology of crystallizer and method efficiently, simple, flexibly, safe, for production scene, has seemed
Very urgently need and be necessary.
The content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of based on parabolic path slab company
The online hot width adjusting method of casting crystallizer so as to the online width fast adjustment of crystallizer under the conditions of full pulling rate can be realized, casting is met
The requirement of base width specifications change, while mould at narrow copper coin extrudes what is caused to the excessive of strand shell during avoiding adjusting width
The bleed-out risk that the excessive air gap of casting blank defect or narrow side copper coin and strand shell is caused.
For achieving the above object and other related purposes, the present invention provides a kind of based on the crystallization of parabolic path sheet billet continuous casting
The online hot width adjusting method of device, comprises the following steps：
(1), previously generate parabola and adjust broad gauge mark x (y)；
(2), it is narrow in upper end, it is narrow while lower end by its respective initial point by corresponding parabola adjust broad gauge mark x (y) fortune
OK；
(3), it is narrow in upper end, it is narrow while lower end reach target location, complete tune and be wider than journey；
Wherein, y represents transition wedge base length.
Further, narrow side upper end is by initial point xt0By x=xt0+ x (y) runs, and narrow side lower end is by initial point xb0By x=
xb0+ x (y-h) runs；Wherein, h represents the effective depth of crystallizer.
Further, the parabola adjusts broad gauge mark x (y) to be made up of two sections of parabolas, and two sections of parabolical intersection points are
(x1, y1)。
Further, the parabola adjusts broad gauge mark x (y) in its intersection point (x1, y1) continuous, and change concavity and convexity in the point.
Further, the parabola adjusts the mathematic(al) representation of broad gauge mark x (y) as follows：
In formula, x represents the variable quantity of strand width；
Y is represented from tune is wide and is started transition wedge base length；
vcsRepresent in the Actual Casting Speed for generating parabola tune broad gauge mark x (y) this moment；
α1, α2Represent that first, second section of parabola adjusts the tune width acceleration of broad gauge mark respectively；
vxMaxRepresent maximum and adjust wide speed；
J represents the wide acceleration of tune.
Further, the mathematic(al) representation for adjusting wide acceleration is as follows：
In formula, w represents the half of crystallizer strand width, and its computing formula is：W=min (wdst, wsrc)/2；
wsrcRepresent the original width of strand, wdstRepresent the target width of strand；
Represent strand critical strain rate；
K represents safety coefficient, and span is 1.2～1.4；
H represents the effective depth of crystallizer.
Further, the mathematic(al) representation for adjusting wide acceleration J is as follows：
Further, the corresponding first paragraph transition wedge of the first paragraph parabola of broad gauge mark x (y) is adjusted with the parabola
Base length y1, first paragraph tune width is from x1Mathematic(al) representation it is as follows,
Corresponding second segment transition wedge base length y of the second segment parabola of broad gauge mark x (y) is adjusted with the parabola2,
Second segment adjusts width from x2Mathematic(al) representation it is as follows,
Wherein,
wsrcRepresent the original width of strand, wdstRepresent the target width of strand.
Further, it is maximum to adjust wide speed vxMaxMathematic(al) representation it is as follows：
Wherein,
wsrC represents the original width of strand, wdsT represents the target width of strand.
Further, it is as follows from the mathematic(al) representation for adjusting width to start to terminate transition wedge base length y to tune width：
Y=y1+y2
Actual to adjust alleviating distention in middle-JIAO, the mathematic(al) representation of transition wedge base length y is as follows：
In formula, vcThe Actual Casting Speed during width is adjusted in expression.
Using said method：1st, it is elementary function that parabola adjusts broad gauge mark x (y), and elementary function connects in its domain of definition
It is continuous, and pass through the calculating of the limit, in intersection point (x1, y1) also continuous, so parabola adjusts broad gauge mark x (y) smooth and continuous,
That is during width is adjusted, x is continuous without mutation with the change of y, that is, during adjusting width, mould at narrow copper coin is close to casting
Green shell is moved, then casting blank deformation and air gap are minimum, so as to the bleed-out wind that the excessive air gap for avoiding narrow side copper coin and strand shell is caused
Danger；
2nd, the physical significance of each variable of broad gauge mark x (y), x is adjusted as to adjust wide speed to the differential of time t from parabola
Degree, and y is pulling rate to the differential of time t, so as to easily proving in the case where pulling rate is constant (i.e. x to the second dervative of t with
Pulling rate is related), the wide acceleration of tune is constant, so the wide speed of tune is acceleration or retarded motion, speed is without mutation；Again due to two
Section parabola adjusts the tune width acceleration of broad gauge mark invariable, then from power and the relation of acceleration, then strand is due to adjusting
Broad crystallisation device is uniform and stable to resistance of deformation produced by the extruding of strand, and support of the narrow side copper coin to strand shell in other words is uniformly steady
It is fixed, so as to the casting blank defect for avoiding excessive extruding of the mould at narrow copper coin to strand shell from causing.
As described above, the invention has the advantages that：
1st, adjust wide speed fast, wide speed is adjusted up to one side 100mm/min；
2nd, adjust wide cut degree big, single is adjusted unrestricted on wide cut topology degree；
3rd, due to adjusting wide speed fast so that the cutting loss of transition wedge base is minimum；
4th, can complete to adjust wide in the range of full pulling rate, pulling rate need not be reduced；
5th, the air gap during whole tune width between narrow side copper coin and strand is minimum, and narrow side is equal to strand shell supporting ＆ stablizing
It is even, it is adapted to various steel grades, it is to avoid bleed-out risk, it is ensured that production safety.
Other advantages of the present invention, target and feature will be illustrated to a certain extent in the following description, and
And to a certain extent, based on being will be apparent to investigating hereafter to those skilled in the art, Huo Zheke
To be instructed from the practice of the present invention.The target and other advantages of the present invention can pass through description below and right will
Seek book to realize and obtain.
Description of the drawings
Fig. 1 is that crystallizer adjusts broad gauge mark schematic diagram when width increases；
Fig. 2 is that crystallizer adjusts broad gauge mark schematic diagram when width reduces.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Fig. 1, Fig. 2 are referred to, in order to describe the present invention in detail, next the present invention is illustrated：Continuous casting
The width of adjusting of crystallizer is that the width between the narrow side copper coin in crystallizer both sides is adjusted.So, it is narrow while upper end refer to it is narrow while
Copper coin upper end, the narrow copper coin lower end when lower end refers to narrow.Due to the narrow side copper coin of both sides it is symmetrical, so in drawings and Examples
The narrow side copper coin of side is only described.
Further, since need to generate that broad gauge mark is adjusted, so needing to set up rectangular coordinate system.Again due to the narrow side copper coin of both sides
Symmetrically, so describing for convenience, the Y-axis of coordinate system is located in the centre of the narrow side copper coin in both sides, makes the narrow side copper coin in both sides with regard to Y
Axial symmetry, and X-axis is intersected with narrow side copper coin lower end.
So, the track of the narrow side copper coin of side is described.If original width 1800mm, target width 2100mm, that
The wide degree of tune of the narrow side copper coin of both sides is exactly 300mm, and the wide degree of the tune of the narrow side copper coin in side is equal to x1+x2=Δ x=
150mm.In the same manner, it is determined that coordinate axess, then the initial point x of narrow side lower endb0It is equal to 900mm, and narrow side upper end xt0Value sheet
Art personnel can be voluntarily calculated according to the taper of narrow side copper coin.
It is a kind of to be based on the online hot width adjusting method of parabolic path continuous casting crystallizer for plate billet, comprise the following steps：
(1), previously generate parabola and adjust broad gauge mark x (y), the parabola adjusts the mathematic(al) representation of broad gauge mark x (y) as follows：
Understood by above-mentioned mathematic(al) representation, or Fig. 1, Fig. 2, parabola adjusts broad gauge mark x (y) to be made up of two sections of parabolas,
I.e. first paragraph parabola adjusts broad gauge mark, second segment parabola to adjust broad gauge mark.For convenience of describe, be referred to as first paragraph parabola,
Second segment parabola.That is first paragraph parabola, its expression formula isThe span y ∈ (0, y of independent variable y1]；The
Two-stage nitration parabola, its expression formula isThe span y ∈ (y of independent variable y1, y1
+y2)。
Two sections of parabolical intersection points are (x1, y1).By calculating limit, derivative or observation Fig. 1, Fig. 2, parabola
Broad gauge mark x (y) is adjusted in intersection point (x1, y1) continuous, and parabola adjusts broad gauge mark x (y) in (x1, y1) change concavity and convexity, in other words
(x1, y1) be parabola adjust broad gauge mark x (y) flex point.
During parabola adjusts the formula of broad gauge mark x (y), x represents the variable quantity of strand width, as parabola adjusts broad gauge mark x
Y () only describes the narrow side copper coin of side, accordingly, the variable quantity of the strand width represented by x also refers to the change of strand side
Amount, and the variable quantity of other side passes through symmetry.Again as strand width is become according to the width of the narrow side copper coin in both sides
Change and change, so, it is also possible to x is regarded as side narrow side copper coin tune width from.
Y is represented from the length for adjusting wide beginning transition wedge base, its span y ∈ (0, x1+y2)；
vcsRepresent in the Actual Casting Speed for generating parabola tune broad gauge mark x (y) this moment；
α1, α2Represent that first, second section of parabola adjusts the tune width acceleration of broad gauge mark respectively；
vxMaxRepresent maximum and adjust wide speed；
J represents the wide acceleration of tune, dimensionless.
In (1st) step, it is necessary first to calculate and adjust wide acceleration,
Adjust the mathematic(al) representation of wide acceleration as follows：
In formula, w represents the half of crystallizer strand width, and its computing formula is：W=min (wdst, wsrc)/2；
wsrcRepresent the original width of strand, wdstRepresent the target width of strand.
Strand critical strain rate is represented, its value is related to steel grade.
K represents safety coefficient, and span is 1.2～1.4, and concrete value is as follows：
The tune that width increases is wider than journey, α1Safety coefficient k capping 1.4, α2Safety coefficient k remove the limit 1.2；
The tune that width reduces is wider than journey, α1Safety coefficient k remove the limit 1.2, α2Safety coefficient k capping 1.4.
H represents the effective depth of crystallizer, and the effective depth of crystallizer refer to crystallizer base plate to liquid steel level away from
From.
Then, calculate and adjust wide acceleration J,
Adjust the mathematic(al) representation of wide acceleration J as follows：
It is two sections that broad gauge mark x (y) is adjusted due to parabola, then accordingly, transition wedge base can also be divided into two sections, i.e., the
One section of transition wedge base, its length are y1, corresponding to first paragraph parabola.Second segment transition wedge base, its length are y2, correspondence
In second segment parabola.
In the same manner, adjust width from or strand width variation x can also be divided into two sections, i.e., first paragraph adjust width from x1, second
Section adjusts width from x2。
Mathematic(al) representation is as follows,
Wherein,
Finally, wide speed V of maximum tune will also be calculatedxMax,
It is maximum to adjust wide speed VxMaxMathematic(al) representation it is as follows：
By α obtained by above-mentioned calculating1, α2, J, x1, x2, y1, y2, vxMaxBring parabola into and adjust broad gauge mark x (y), obtain specific
Parabola adjusts broad gauge mark x (y).
(2), it is narrow in upper end, it is narrow while lower end by its respective initial point by corresponding parabola adjust broad gauge mark x (y) fortune
OK；
I.e. narrow side upper end is by initial point xt0By x=xt0+ x (y) runs, and narrow side lower end is by initial point xb0By x=xb0+x(y-
H) run.
(3), it is narrow in upper end, it is narrow while lower end reach target location, complete tune and be wider than journey.
I.e. transition wedge base length y reaches y1+y2When, then the tune width of the narrow side copper coin of side also reaches x simultaneously from x1
+x2=Δ x, at this moment adjusts width to complete.
From the foregoing, either width increases or the tune for reducing is wider than journey, at a time T, generates parabola
Adjust broad gauge mark x (y), then, determine that the functional relationship between x-y.
Functional relationship determine after, it is narrow in upper end, it is narrow while lower end position x only become with the change of transition wedge base length y
Change, that is to say, that it is narrow in upper end, it is narrow while lower end position be to change with the length that transition wedge base is pulled out by crystallizer.
And this change is divided into two sections, i.e. first paragraph parabola, the length of transition wedge base increase to y from 01, accordingly
Narrow side upper end is by xt0It is changed into xt0+x(y1), narrow side lower end is by xb0It is changed into xb0+x(y1-h)；Second segment parabola, transition wedge base
Length from y1Increase to y1+y2, corresponding narrow side upper end is by xt0+x(y1) it is changed into xt0+x(y1+y2), narrow side lower end is by xb0+x
(y1- h) it is changed into xb0+x(y1+y2-h)。
Similarly, since determining the functional relationship between x-y, tune broad gauge mark is also determined that, the tune broad gauge mark will not be with
The change of Actual Casting Speed and change.So, during width is adjusted allow Actual Casting Speed to fluctuate within the specific limits, can when pulling
To be calculated as follows transition wedge base length,
vcThe Actual Casting Speed during width is adjusted in expression.
In the calculating of transition wedge base length, it is known that, start to tune is wide to terminate in overall process from tune width, transition wedge
The mathematic(al) representation of base length y is as follows：
Y=y1+y2
And alleviating distention in middle-JIAO is adjusted actual, the mathematic(al) representation of transition wedge base length y is as follows：
So, it is actual to adjust alleviating distention in middle-JIAO, with wide carrying out is adjusted, when transition wedge base lengthWhen, this
When, it is narrow in upper end, it is narrow while lower end similarly reach target location, that is, adjust width terminate.
Embodiment 1
As shown in Figure 1, the present embodiment 1 is that the tune that width increases is wider than journey, if original width wsrc=1800mm, target
Width wdst=2100mm.
Firstly, it is necessary to determine that first, second section of parabola adjusts the tune width acceleration of broad gauge mark according to current pulling rate, steel grade etc.
α1, α2,
If adjusting wide front pulling rate vcs=1.2m/min；
W=min (wdst, wsrc)；
Crystallizer effective depth 800mm；
Mild steel critical strain rate
The tune that width increases is wider than journey, α1Safety coefficient k capping 1.4, α2Safety coefficient k remove the limit 1.2.
Unified dimension, brings calculating into,
Obtain：
α1=63.6mm/min2,
α2=74.3mm/min2；
Again by
Bring calculating into, first obtain Δ x=150mm, then by α1, α2Value bring into, finally obtain
First paragraph wedge shape base length y1=1.91m, first paragraph adjust width from x1=80.8mm；
Second segment wedge shape base length y2=1.64m, second segment adjust width from x2=69.2mm；
It is maximum to adjust wide speed vxMax=101mm/min；
Transition wedge base length y is equal to first paragraph wedge shape base length and second segment wedge shape base length sum, so transition wedge
Shape base length y=3.55m,
Calculate and adjust wide acceleration
Due in the present embodiment, being that the tune that width increases is wider than journey, original width wsrc=1800mm, target width wdst
=2100mm, i.e. wdst＞ wsrc。
Then specific parabola adjusts broad gauge mark x (y) such as following formula：
2nd, narrow side upper end is by initial point xt0By x=xt0+ x (y) runs, and narrow side lower end is by initial point xb0By x=xb0+x(y-
H) run；
3rd, it is narrow in upper end, it is narrow while lower end reach target location, complete tune and be wider than journey.
Due to it is narrow in upper end or it is narrow while lower end change it is only relevant with the value of y, it is when y reaches 3.55m, narrow side upper end, narrow
Side lower end reaches target location, then adjust width to complete.
Embodiment 2
As shown in Fig. 2 the present embodiment 2 is the tune that width reduces is wider than journey, if original width wsrc=2400mm, target width
Degree wdst=2000mm.
Firstly, it is necessary to determine that first, second section of parabola adjusts the tune width acceleration of broad gauge mark according to current pulling rate, steel grade etc.
α1, α2,
If adjusting wide front pulling rate vcs=1.2m/min；
W=min (wdst, wsrc)/2；
Crystallizer effective depth 800mm；
Mild steel critical strain rate
Due to being that the tune that width reduces is wider than journey, α1Safety coefficient k remove the limit 1.2, α2Safety coefficient k capping
1.4；Adjust wide acceleration
Bring calculating into, obtain
α1=82.5mm/minw, α2=70.7mm/min2；
Adjust wide distance, delta x=200mm；
First paragraph wedge shape base length y1=1.8m, first paragraph adjust width from x1=92mm；
Second segment wedge shape base length y2=2.09m, second segment adjust width from x2=108mm；
Transition wedge base length y=3.89m；
It is maximum to adjust wide speed vxMax=123mm/min；
Obtain specific parabola and adjust broad gauge mark x (y) such as following formula：
2nd, narrow side upper end is by initial point xt0By x=xt0+ x (y) runs, and narrow side lower end is by initial point xb0By x=xb0+x(y-
H) run；
3rd, it is narrow in upper end, it is narrow while lower end reach target location, complete tune and be wider than journey.
Finally illustrate, above example is only unrestricted to illustrate technical scheme, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of the technical program, which all should be covered in the present invention
Right in the middle of.
Claims (10)
1. the online hot width adjusting method of a kind of continuous cast mold based on parabolic path, it is characterised in that comprise the following steps：
(1), previously generate parabola and adjust broad gauge mark x (y)；
(2), it is narrow in upper end, it is narrow while lower end by its respective initial point by corresponding parabola adjust broad gauge mark x (y) operation；
(3), it is narrow in upper end, it is narrow while lower end reach target location, complete tune and be wider than journey；
Wherein, y represents transition wedge base length.
2. the online hot width adjusting method of continuous cast mold as claimed in claim 1 based on parabolic path, it is characterised in that narrow
Side upper end is by initial point xt0By x=xt0+ x (y) runs, and narrow side lower end is by initial point xb0By x=xb0+ x (y-h) runs；Wherein, h
Represent the effective depth of crystallizer.
3. the online hot width adjusting method of continuous cast mold as claimed in claim 1 based on parabolic path, it is characterised in that institute
Stating parabola adjusts broad gauge mark x (y) to be made up of two sections of parabolas, and two sections of parabolical intersection points are (x1, y1)。
4. the online hot width adjusting method of continuous cast mold as claimed in claim 3 based on parabolic path, it is characterised in that institute
State parabola broad gauge mark x (y) is adjusted in its intersection point (x1, y1) continuous, and change concavity and convexity in the point.
5. the online hot width adjusting method of the continuous cast mold based on parabolic path as described in claim 1-4 any one, its
It is characterised by, the parabola adjusts the mathematic(al) representation of broad gauge mark x (y) as follows：
In formula, x represents the variable quantity of strand width；
Y is represented from tune is wide and is started transition wedge base length；
vcsRepresent in the Actual Casting Speed for generating parabola tune broad gauge mark x (y) this moment；
α1, α2Represent that first, second section of parabola adjusts the tune width acceleration of broad gauge mark respectively；
vxMaxRepresent maximum and adjust wide speed；
J represents the wide acceleration of tune.
6. the online hot width adjusting method of continuous cast mold as claimed in claim 5 based on parabolic path, it is characterised in that institute
State and adjust the mathematic(al) representation of wide acceleration as follows：
In formula, w represents the half of crystallizer strand width, and its computing formula is：W=min (wdst, wsrc)/2；
wsrcRepresent the original width of strand, wdstRepresent the target width of strand；
Represent strand critical strain rate；
K represents safety coefficient, and span is 1.2～1.4；
H represents the effective depth of crystallizer.
7. the online hot width adjusting method of continuous cast mold as claimed in claim 5 based on parabolic path, it is characterised in that institute
State and adjust the mathematic(al) representation of wide acceleration J as follows：
。
8. the online hot width adjusting method of continuous cast mold as claimed in claim 5 based on parabolic path, it is characterised in that with
The parabola adjusts corresponding first paragraph transition wedge base length y of the first paragraph parabola of broad gauge mark x (y)1, first paragraph is adjusted wide
Apart from x1Mathematic(al) representation it is as follows,
Corresponding second segment transition wedge base length y of the second segment parabola of broad gauge mark x (y) is adjusted with the parabola2, second
Section adjusts width from x2Mathematic(al) representation it is as follows,
Wherein,
wsrcRepresent the original width of strand, wdstRepresent the target width of strand.
9. the online hot width adjusting method of continuous cast mold as claimed in claim 5 based on parabolic path, it is characterised in that most
It is big to adjust wide speed vxMaxMathematic(al) representation it is as follows：
Wherein,
wsrcRepresent the original width of strand, wdstRepresent the target width of strand.
10. the online hot width adjusting method of continuous cast mold as claimed in claim 8 based on parabolic path, it is characterised in that
It is as follows from the mathematic(al) representation for adjusting width to start to terminate transition wedge base length y to tune width：
Y=y1+y2
Actual to adjust alleviating distention in middle-JIAO, the mathematic(al) representation of transition wedge base length y is as follows：
In formula, vcThe Actual Casting Speed during width is adjusted in expression.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02284747A (en) * | 1989-04-24 | 1990-11-22 | Sumitomo Metal Ind Ltd | Mold for continuous casting |
| JP2009022971A (en) * | 2007-07-18 | 2009-02-05 | Nippon Steel Corp | Continuous casting method and continuous casting mold |
| CN102335729A (en) * | 2011-10-24 | 2012-02-01 | 中冶连铸技术工程股份有限公司 | Hyperbolic-type crystallizer copper pipe |
| CN102601328A (en) * | 2012-03-23 | 2012-07-25 | 中冶南方工程技术有限公司 | Multistep method for online adjusting width decrease of crystallizer rapidly |
| CN103567409A (en) * | 2012-08-03 | 2014-02-12 | 山西太钢不锈钢股份有限公司 | Method for on-line width adjusting of continuous casting |
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2016
- 2016-12-27 CN CN201611226381.0A patent/CN106513613B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02284747A (en) * | 1989-04-24 | 1990-11-22 | Sumitomo Metal Ind Ltd | Mold for continuous casting |
| JP2009022971A (en) * | 2007-07-18 | 2009-02-05 | Nippon Steel Corp | Continuous casting method and continuous casting mold |
| CN102335729A (en) * | 2011-10-24 | 2012-02-01 | 中冶连铸技术工程股份有限公司 | Hyperbolic-type crystallizer copper pipe |
| CN102601328A (en) * | 2012-03-23 | 2012-07-25 | 中冶南方工程技术有限公司 | Multistep method for online adjusting width decrease of crystallizer rapidly |
| CN103567409A (en) * | 2012-08-03 | 2014-02-12 | 山西太钢不锈钢股份有限公司 | Method for on-line width adjusting of continuous casting |
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