CN107088650A - A kind of control method for improving continuous casting machine roll-gap precision - Google Patents
A kind of control method for improving continuous casting machine roll-gap precision Download PDFInfo
- Publication number
- CN107088650A CN107088650A CN201710279148.7A CN201710279148A CN107088650A CN 107088650 A CN107088650 A CN 107088650A CN 201710279148 A CN201710279148 A CN 201710279148A CN 107088650 A CN107088650 A CN 107088650A
- Authority
- CN
- China
- Prior art keywords
- roll gap
- mrow
- mfrac
- section
- segment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of control method for improving continuous casting machine roll-gap precision, it is adaptable to slab caster, and the slab caster includes camber section, straightening section and horizontal segment, and segmental arc, straightening section and horizontal segment are constituted by several fan-shaped sections, it is characterised in that：This method is specially：The roll gap compensation rate β of the control reference position of each fan-shaped section is calculated, with the former segment roll gap setting value of the compensation rate amendment；Then each segment roll gap setting value is：Gset=Gint+ β, GsetFor segment roll gap setting value, GintFor former segment roll gap setting value.The present invention is by carrying out certain compensation to existing fixed value of roller slit, to reduce the roller amount of misaligning, so as to reduce the deformation rate of strand, and then reaches the purpose of improvement strand segregation and crack defect.
Description
Technical field
The invention belongs to metallurgical technology field, it is related to a kind of control method for improving continuous casting machine roll-gap precision.
Background technology
Continuous casting, which is liquid molten steel, is passing through crystallizer, guide section (including sufficient roller, vertical section, bending section, camber section, aligning
Section and horizontal segment) when cooled and solidified into the process for having effigurate solid-state steel billet, as shown in Figure 1.In molten steel solidification Cheng Zhu
During base, the defect such as segregation, crackle happens occasionally, and these defects will influence the qualification rate of follow-up rolled steel, stocking
Mechanical property.Therefore, eliminate or improve the significant of strand segregation and crack defect.
In the factor for causing segregation and crackle to occur, the roll gap precision of conticaster is important influence factor.Some steel
Factory is in order to ensure roll gap precision, and regulation is walked weekly a roll gap meter, ± 0.5mm the deviation ranges of desired value are sewn on calibration rollers
It is interior, so as to control caused by roller is misaligned casting blank deformation rate in allowed band, and then ensure continuous casting billet quality.
During design for continuous casting machine, after the radius (being often referred to the outer arc radius of conticaster) and benchmark roll gap of conticaster are determined, then
Interior arc radius has also been determined that (benchmark roll gap=outer arc radius-interior arc radius), after roller row are sequenced, by roller packet with fan-shaped section
Form be controlled by, exemplified by (5) number fan-shaped section (its enlarged drawing is as shown in Figure 2) as shown in Figure 1, its fan-shaped section form is as schemed
Shown in 3.The strand of production different-thickness specification is to move framework in fan-shaped section by hydraulic cylinder to drive inner arc roller group change in location
Realize.Because the radius that inner arc roll row is arranged is fixed, when producing the strand of non-referenced roll gap thickness, in each fan-shaped section
2 points are up on arc roll surface can reach required control position, and other positions are and ideal position has deviation.
By taking the conticaster that roller shown in Fig. 1 is arranged as an example, its radius is 13000m, and benchmark roll gap is 366mm, then inner arc roller row half
Footpath is 12634mm, and during production 366mm, 250mm, 420mm section, the roller deviation of its (5) number fan-shaped section is as shown in table 1 below.
Table 1 (5) number fan-shaped section produces the roll gap deviation (unit of every roller of different section：mm)
As seen from the above table, when producing 366mm sections, the deviation of every roller is 0.00mm, because the conticaster
Outer arc radius be 13000mm, interior arc radius be 12634mm, benchmark roll gap be 366mm, when producing the section, every inner arc roller
On its standard camber line.
Produce 250mm sections and during 420mm sections, only its No. 52 rollers and No. 58 rollers (namely first of fan-shaped section
Roller and last root roller) it is not present deviation, there is deviation in other rollers, and the roll gap maximum deviations of two sections is respectively-
0.33mm and 0.16mm.Because, when controlling inner arc roller position, be using first roller of fan-shaped section and last root roller as
What reference position was controlled, distance reference position is more remote, then deviation is bigger.
- the 0.33mm and 0.16mm deviation that misaligns has much influences on slab qualityCan be from it to casting blank deformation rate
Influence degree in terms of be illustrated.In Design of Roll Range, casting blank deformation rate is to check the whether reasonable key of Design of Roll Range, one
As slab caster require that casting blank deformation rate is less than 0.5%.With the roller row production 250mm section casting blanks shown in Fig. 1, in 1.1m/
Under conditions of min pulling rates and specific water 0.61l/min, its bulge deformation rate, roller misalign deformation rate (with 0.5mm rollers not
Centering amount calculate) and continuous bend continuous straightening deformation rate as shown in figure 4, as can be seen from the figure roller misaligns deformation rate
Influence is larger.Each average value is as shown in table 2 for three kinds of deformation rates.
The casting blank deformation rate situation of table 2
| Bulge deformation rate | Roller misaligns deformation rate | Even deformation rate is rectified by curved company |
| 0.13% | 0.14% | 0.04% |
It is directly proportional, therefore, is calculated with above-mentioned condition, roller is not to the roller amount of misaligning because roller misaligns deformation rate amount
Centering amount often reduces 0.1mm, and the total deformation of strand reduces 9.03% relative to original total deformation rate, it is known that, 0.1mm roller
Misalign influence of the deflection to casting blank deformation rate can not be ignored, this point can also be tested from steel mill's actual production process
Card, in actual production process, the section produced is with horizon radius closer to the quality of strand is often better.Currently for
The roller of this congenital presence misaligns situation, eliminate or improve its on roll gap precision influence method there is not been reported.
The content of the invention
In view of this, it is an object of the invention to provide a kind of control method for improving continuous casting machine roll-gap precision, it be not added to
On the premise of this, reduce because produce section deviation benchmark roll gap and caused by roller misalign influence to roll gap precision, from
And improve continuous casting billet quality.
The purpose of the present invention is achieved through the following technical solutions, a kind of controlling party for improving continuous casting machine roll-gap precision
Method, it is adaptable to slab caster, the slab caster includes camber section, straightening section and horizontal segment, segmental arc, straightening section and water
Flat section is constituted by several fan-shaped sections, and this method is specially：Calculate the roll gap compensation of the control reference position of each fan-shaped section
β is measured, with the former segment roll gap setting value of the compensation rate amendment；Then each segment roll gap setting value is：Gset=Gint+ β, Gset
For segment roll gap setting value, GintFor former segment roll gap setting value.
Further, the computational methods of the roll gap compensation rate β are as follows：
Wherein：α is fan-shaped section angle, RbArc radius in conticaster, r is the interior arc radius needed for production specific thicknesses.
Further, the roll gap compensation rate of the segmental arc positioned at horizontal segment is 0.
By adopting the above-described technical solution, the present invention has the advantage that：
The present invention is by carrying out certain compensation to existing fixed value of roller slit, to reduce the roller amount of misaligning, so as to reduce
The deformation rate of strand, and then reach the purpose of improvement strand segregation and crack defect.
Brief description of the drawings
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into
The detailed description of one step, wherein：
Fig. 1 is that caster roll lists intention；
Fig. 2 is (5) number fan-shaped section roll line enlarged drawing；
Fig. 3 is (5) number fan-shaped section schematic diagram；
Fig. 4 illustrates for casting blank deformation rate；
Fig. 5 is that fan-shaped section parameter marks schematic diagram；
Wherein, 1 is vertical section, and 2 be bending section, and 3 be camber section, and 4 be straightening section, and 5 be horizontal segment, 52~58 fan-shaped section rolls
Son, 6 be outer arc, and 7 be inner arc, and 8 be hydraulic cylinder, and 9 be upper framework, and 10 be inner arc roller, and 11 be outer arc roller.
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail；It should be appreciated that preferred embodiment
Only for the explanation present invention, the protection domain being not intended to be limiting of the invention.
The present invention is applied in example, and the control reference position that each fan-shaped section of segmental arc and straightening section is calculated first is (i.e. fan-shaped
Section first and last root roller) roll gap compensation rate, take roll gap compensation rate β=0 of horizontal segment；Calculating obtains each fan
After the roll gap compensation rate β of shape section, existing fixed value of roller slit is compensated, final fixed value of roller slit is obtained.
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
This patent is applicable all slab casters, so that Fig. 1 is the conticaster of shown roller row as an example, one kind of the present invention
Improve the control method of continuous casting machine roll-gap precision.Described method is as follows：
1) the horizontal segment control reference position (i.e. first of fan-shaped section and last root roller) for being located at camber section is calculated
Roll gap compensation rate, under formula；
Wherein：β is roll gap compensation rate；α is fan-shaped section angle, as shown in Figure 5 production, unit position °；RbConticaster inner arc half
Footpath, as shown in figure 5, unit mm；
Interior arc radius needed for r production specific thicknesses, with the R in Fig. 5lAnd RsCorrespondence is thought, when production slab thickness is more than base
During quasi- roll gap, R is takenl, when producing slab thickness less than benchmark roll gap, take Rs；
2) the roll gap compensation rate of the segmental arc positioned at straightening section is calculated, due to being made up of multiple radiuses, ignores what is passed through mostly
Influence, calculation formula is identical with camber section；
Take compensation rate β=0 of horizontal segment；
3) the then roll gap setting such as following formula of fan-shaped section：
Gset=Gint+β
GsetFor segment roll gap setting value, GintFor former segment roll gap setting value.
The present invention is by carrying out certain compensation to existing fixed value of roller slit, to reduce the roller amount of misaligning, so as to reduce
The deformation rate of strand, and then reach the purpose of improvement strand segregation and crack defect.
Illustrated below by specific embodiment：
Certain steel mill's conticaster, as shown in figure 1, radius is 13000mm, benchmark roll gap is 366mm, there is 15 fan-shaped sections, raw
Produce Q345 steel.Implementation steps of the present embodiment in each fan-shaped section are identicals, therefore, and fan-shaped section (5) is only chosen herein and is entered
Row is described in detail, specific as follows：
When producing the strand of 250mm thickness, the former entrance roll gap of its (5) number fan-shaped section is 256.7mm, and original outlet roll gap is
255.9mm；Its compensation rate is calculated using equation below：
Obtain β=0.17mm；
Then the entrance roll gap of No. 5 fan-shaped sections is 256.7mm+0.17mm=256.87mm, and outlet roll gap is 255.9mm+
0.17mm=256.07mm；Compared to original setting, the method that this patent is related to is misaligned to roller serves improvement result, such as
Shown in table 3, the former method roller amount of misaligning maximum of 250mm thickness strand caused by benchmark roll gap reason is -0.34mm, and
The method that this patent the is related to roller amount of misaligning maximum of 250mm thickness strand caused by benchmark roll gap reason is -0.17mm,
So that the roller amount of misaligning of 250mm thickness strand reduces 50% caused by benchmark roll gap reason.
Table 3 (5) number fan-shaped section produces the roll gap deviation (unit of every roller of different section：mm)
Originally the segregation for producing the steel grade is rated C25, and the segregation of production steel grade now is rated C15~C20.Strand is inclined
Analysis situation is improved, and it is 0.15% that the steel grade cracking frequency is produced originally, and the cracking frequency of production steel grade is now
0.1%
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, it is clear that those skilled in the art
Member can carry out various changes and modification to the present invention without departing from the spirit and scope of the present invention.So, if the present invention
These modifications and variations belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to include these
Including change and modification.
Claims (3)
1. a kind of control method for improving continuous casting machine roll-gap precision, it is adaptable to which slab caster, the slab caster includes arc
Type section, straightening section and horizontal segment, segmental arc, straightening section and horizontal segment are constituted by several fan-shaped sections, it is characterised in that：The party
Method is specially：The roll gap compensation rate β of the control reference position of each fan-shaped section is calculated, with the former segment roll gap of the compensation rate amendment
Setting value；Then each segment roll gap setting value is：Gset=Gint+ β, GsetFor segment roll gap setting value, GintFor former sector
Section fixed value of roller slit.
2. a kind of control method for improving continuous casting machine roll-gap precision according to claim 1, it is characterised in that：The roll gap
Compensation rate β computational methods are as follows：
<mrow>
<mi>&beta;</mi>
<mo>=</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>cos</mi>
<mfrac>
<mi>&alpha;</mi>
<mn>2</mn>
</mfrac>
<mo>)</mo>
</mrow>
<mi>r</mi>
<mo>+</mo>
<msqrt>
<mrow>
<msup>
<mrow>
<mo>&lsqb;</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>cos</mi>
<mfrac>
<mi>&alpha;</mi>
<mn>2</mn>
</mfrac>
<mo>)</mo>
</mrow>
<mi>r</mi>
<mo>&rsqb;</mo>
</mrow>
<mn>2</mn>
</msup>
<mo>-</mo>
<mn>4</mn>
<mo>&lsqb;</mo>
<mn>1</mn>
<mo>+</mo>
<mi>cos</mi>
<mfrac>
<mi>&alpha;</mi>
<mn>2</mn>
</mfrac>
<mo>&rsqb;</mo>
<mo>&lsqb;</mo>
<mn>1</mn>
<mo>-</mo>
<mi>cos</mi>
<mfrac>
<mi>&alpha;</mi>
<mn>2</mn>
</mfrac>
<mo>&rsqb;</mo>
<mrow>
<mo>(</mo>
<msubsup>
<mi>R</mi>
<mi>b</mi>
<mn>2</mn>
</msubsup>
<mo>-</mo>
<msub>
<mi>R</mi>
<mi>b</mi>
</msub>
<mi>r</mi>
<mo>)</mo>
</mrow>
</mrow>
</msqrt>
<mo>/</mo>
<mn>2</mn>
<mo>&lsqb;</mo>
<mn>1</mn>
<mo>+</mo>
<mi>cos</mi>
<mfrac>
<mi>&alpha;</mi>
<mn>2</mn>
</mfrac>
<mo>&rsqb;</mo>
<mo>,</mo>
</mrow>
Wherein：α is fan-shaped section angle, RbArc radius in conticaster, r is the interior arc radius needed for production specific thicknesses.
3. a kind of control method for improving continuous casting machine roll-gap precision according to claim 1, it is characterised in that：It is described to be located at
The roll gap compensation rate of the segmental arc of horizontal segment is 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710279148.7A CN107088650B (en) | 2017-04-25 | 2017-04-25 | A kind of control method improving continuous casting machine roll-gap precision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710279148.7A CN107088650B (en) | 2017-04-25 | 2017-04-25 | A kind of control method improving continuous casting machine roll-gap precision |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107088650A true CN107088650A (en) | 2017-08-25 |
| CN107088650B CN107088650B (en) | 2019-03-26 |
Family
ID=59637957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710279148.7A Active CN107088650B (en) | 2017-04-25 | 2017-04-25 | A kind of control method improving continuous casting machine roll-gap precision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107088650B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434058A (en) * | 2018-12-29 | 2019-03-08 | 首钢集团有限公司 | A kind of scaling method of conventional slab caster roll gap |
| CN110026536A (en) * | 2019-05-29 | 2019-07-19 | 中冶赛迪工程技术股份有限公司 | A kind of shaped sectional roll of continuous casting seam caliberating device and online calibration method |
| CN114046724A (en) * | 2021-11-09 | 2022-02-15 | 山东钢铁集团日照有限公司 | Method and device for calibrating roll gap of slab continuous casting sector section |
| CN115069999A (en) * | 2022-06-30 | 2022-09-20 | 天津钢铁集团有限公司 | Method for judging precision of continuous casting machine through foot roll printing and casting of narrow surface of casting blank |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4148349A (en) * | 1976-05-08 | 1979-04-10 | Yutaka Sumita | Method for controlling slippage between rolls and a slab in a continuous compression casting apparatus |
| CN103464711A (en) * | 2013-08-29 | 2013-12-25 | 鞍钢股份有限公司 | Method for solving bloom internal segregation |
| CN103862018A (en) * | 2014-02-10 | 2014-06-18 | 邯钢集团邯宝钢铁有限公司 | Method for regulating fan-shaped section roller seams of continuous casing machine by using mathematical model |
| CN105057625A (en) * | 2015-08-12 | 2015-11-18 | 河北钢铁股份有限公司邯郸分公司 | Adjusting method of slab caster roll gap under unsteady state pouring condition |
| CN105234364A (en) * | 2015-09-09 | 2016-01-13 | 中冶连铸技术工程有限责任公司 | Method and device for controlling roller seam deviation in soft pressing process or hard pressing process |
-
2017
- 2017-04-25 CN CN201710279148.7A patent/CN107088650B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4148349A (en) * | 1976-05-08 | 1979-04-10 | Yutaka Sumita | Method for controlling slippage between rolls and a slab in a continuous compression casting apparatus |
| CN103464711A (en) * | 2013-08-29 | 2013-12-25 | 鞍钢股份有限公司 | Method for solving bloom internal segregation |
| CN103862018A (en) * | 2014-02-10 | 2014-06-18 | 邯钢集团邯宝钢铁有限公司 | Method for regulating fan-shaped section roller seams of continuous casing machine by using mathematical model |
| CN105057625A (en) * | 2015-08-12 | 2015-11-18 | 河北钢铁股份有限公司邯郸分公司 | Adjusting method of slab caster roll gap under unsteady state pouring condition |
| CN105234364A (en) * | 2015-09-09 | 2016-01-13 | 中冶连铸技术工程有限责任公司 | Method and device for controlling roller seam deviation in soft pressing process or hard pressing process |
Non-Patent Citations (1)
| Title |
|---|
| 罗高强等: "多种厚度规格板坯连铸机辊缝偏差探讨", 《工业加热》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434058A (en) * | 2018-12-29 | 2019-03-08 | 首钢集团有限公司 | A kind of scaling method of conventional slab caster roll gap |
| CN109434058B (en) * | 2018-12-29 | 2021-07-23 | 首钢集团有限公司 | Calibration method for roll gap of slab casting machine |
| CN110026536A (en) * | 2019-05-29 | 2019-07-19 | 中冶赛迪工程技术股份有限公司 | A kind of shaped sectional roll of continuous casting seam caliberating device and online calibration method |
| CN110026536B (en) * | 2019-05-29 | 2024-02-23 | 中冶赛迪工程技术股份有限公司 | Calibration device and online calibration method for roll gap of fan-shaped section of continuous casting machine |
| CN114046724A (en) * | 2021-11-09 | 2022-02-15 | 山东钢铁集团日照有限公司 | Method and device for calibrating roll gap of slab continuous casting sector section |
| CN115069999A (en) * | 2022-06-30 | 2022-09-20 | 天津钢铁集团有限公司 | Method for judging precision of continuous casting machine through foot roll printing and casting of narrow surface of casting blank |
| CN115069999B (en) * | 2022-06-30 | 2023-07-21 | 天津钢铁集团有限公司 | Method for judging precision of continuous casting machine through casting blank narrow-face foot roll mark casting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107088650B (en) | 2019-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107088650A (en) | A kind of control method for improving continuous casting machine roll-gap precision | |
| EP2818259B1 (en) | Pre-control method of head and tail shapes of continuous casting slab for reducing the removed amount from the head and tail of hot-rolled intermediate slab | |
| EP3144080B1 (en) | Continuous casting method for slab | |
| CN102380596B (en) | Method for adjusting secondary cooling water amount and roll gap value of double-flow slab casting machine | |
| CN102451838A (en) | Method for overcoming camber defect in hot rolling process of steel plate | |
| US20160082491A1 (en) | Method for producing a metal strip | |
| CN101912886A (en) | Optimizing method for controlling side part to be thinned | |
| CN105642677A (en) | Method and device for removing roll marks on surface of band steel | |
| CN110726064A (en) | Corner thickened cold-hot composite molded square rectangular steel pipe and preparation method thereof | |
| CN104741560B (en) | A kind of method reducing the transverse corner crack stricture of vagina of steel containing niobium | |
| CN107008877B (en) | A kind of control method improving continuous casting machine roll-gap precision | |
| CN104057052A (en) | Continuous casting technology suitable for chamfering crystallizer stable production | |
| CN112264594B (en) | Control method for improving control precision of opening degree under soft press of continuous casting fan-shaped section | |
| CN113953479A (en) | Method for improving flanging of thin strip steel coil | |
| CN105369031A (en) | Induction quenching method for eliminating quenching ring cracks of roll bodies of supporting rolls | |
| UA112740C2 (en) | DEVICE AND METHOD OF METAL HORIZONTAL CASTING | |
| KR20090069822A (en) | '?'type steel manufacturing method | |
| CN114505461A (en) | Method for improving corner cracks and intermediate cracks of plate blank | |
| WO2010061946A1 (en) | Cooling device in t-bar hot-rolling line, and t-bar manufacturing facility and manufacturing method | |
| CN111250552B (en) | Method and device for avoiding deviation of plate blank | |
| CN102974625B (en) | Rolling pressure compensation method of finish rolling rack | |
| CN110369687B (en) | Intelligent device and method for online real-time correction of trapezoidal defects of slab section | |
| CN210587070U (en) | Intelligent device for online real-time correction of trapezoidal defects of slab section | |
| CN208527698U (en) | Roll | |
| CN221246878U (en) | Multi-size universal positioning guide device for continuous casting machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |