CN106552912A - The compact fan-shaped section of enhancement mode is used under a kind of weight of continuous casting and solidifying end - Google Patents
The compact fan-shaped section of enhancement mode is used under a kind of weight of continuous casting and solidifying end Download PDFInfo
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- CN106552912A CN106552912A CN201611063063.7A CN201611063063A CN106552912A CN 106552912 A CN106552912 A CN 106552912A CN 201611063063 A CN201611063063 A CN 201611063063A CN 106552912 A CN106552912 A CN 106552912A
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- roll
- upper backup
- lower backing
- shaped section
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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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
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Abstract
The invention provides the compact fan-shaped section of enhancement mode is used under a kind of weight of continuous casting and solidifying end, belong to continuous casting field, including：Inner frame and outside framework are oppositely arranged up and down, four clamping cylinders are each passed through the corner of inner frame and outside framework, by the interval holding between inner frame and outside framework in setting value, inner arc roller row are connected on inner frame, outer arc roller row are connected on outside framework, inner arc roller row include at least five upper backup rolls, outer arc roller row include at least five lower backing rolls, upper backup roll and lower backing roll adopt merogenesis roll structure, in upper backup roll and lower backing roll, at least one is driven roller, remaining is driven voller, driven roller one end is connected with motor, pressure cylinder is connected with the driven roller in upper backup roll.The fan-shaped section can be obviously improved continuous casting and solidifying end drafts, prevent strand rebound deformation, while ensureing inside and outside strand center portion and green shell synchronous during samming, it is to avoid loose, improve solidification end pressure ability.
Description
Technical field
The invention belongs to continuous casting field, and in particular to the compact sector of enhancement mode is used under a kind of weight of continuous casting and solidifying end
Section.
Background technology
Solidification end soft reduction technique is to improve center segregation of casting blank and loose effective means, has become newly-built continuous casting
The generally outfit technology of machine.Bloom solidification end slighter compress relies primarily on air cooling zone withdrawal straightening machine pressure and completes, the list of slighter compress
Roller drafts is usually no more than 5mm, and pressure total amount is usually no more than 15mm.
However, with the increase of casting blank section, drafts is substantially reduced to the osmotic efficiency of strand center portion, conventional slighter compress
Drafts solidification shrinkage can not be fully compensated.At the same time, casting blank solidification latter stage, casting billet surface define natural with center portion
Thermograde (up to more than 500 DEG C), if carrying out aximal deformation value pressure at this moment, drafts far surpasses to the osmotic efficiency of center portion
Rough rolling process (rough rolling process strand is samming base) is crossed, so as to can reach seam solidification shrinkage cavity, or even refinement center portion austenite crystal
The technological effect of grain.According to this theory, a few countries have carried out improving upgrading to large square bland continuous-casting machine in the world, propose
Solidification end weight Reduction Technology.Continuous casting billet solidifying end weight Reduction Technology is capable of achieving to depress the pressure of more than total amount 25mm, far
More than the pressure total amount of slighter compress, the technological effect of shrinkage cavity is solidified so as to reach seam.
Continuous casting billet solidifying end weight Reduction Technology realizes that using multiple technologies pattern for example Kawasaki, Japan ferrum is proposed at present
Continuous Forging (continuous forging) technology of bloom solidification end, the technology is by installing one in solidification end
Continuous forging to strand is realized to chopping block, so as to improve strand center porosity.Nippon proposes NS Bloom
Large ReductionTechnology (Nippon Steel's bloom weight Reduction Technology), which passes through just to have solidified at position in strand
The convex roller of a pair similar roughing mills is installed, the enforcement under weight is realized.The POSharp technologies of Korea's Pu item adopt fan-shaped section shape
Formula completes the enforcement under solidification end weight, and its pressure range is in fs=0.05-0.6 scopes, reduction ratio 5-20mm/m.Additionally,
The PCCS technologies of Sumitomo Metal Industries are also adopted by single roller and carry out the pressure of 10mm or so, are descended with completing slab solidification end weight
Journey.
The installation site for implementing to equip under weight using single roller is mostly fixed, and its depressing position is fixed on certain of casting stream
Position, when Coagulated hemothorax changes with pulling rate, it is impossible to ensure the accurate pressure in Coagulated hemothorax position.And fan-shaped segmented mode is
Depressed on continuous surface, as long as Coagulated hemothorax falls in the range of pressure, can be acted on by pressure.On the other hand, single roller
The rebound deformation of strand after uncontrollable pressure is depressed, and due to the presence of strand internal and external temperature gradient, it is gradually cold in strand
But, during, the percent thermal shrinkage of strand center portion is significantly higher than casting billet surface, therefore strand center portion will be continuation generation loose.And continue
Pressure can make full use of the lasting pressure feature of fan-shaped section, prevent strand rebound deformation, while ensureing samming mistake inside and outside strand
Journey central part and green shell synchronous, it is to avoid loose.
However, the general maximum depression ability of routine continuous casting billet fan-shaped section is less than 10mm at present, in order to ensure under weight
Effectively implement, the corresponding fan-shaped section of exploitation should be matched.
The content of the invention
In order to overcome the shortcomings of that above-mentioned prior art is present, the invention provides with increasing under a kind of weight of continuous casting and solidifying end
The compact fan-shaped section of strong type.
To achieve these goals, the present invention provides following technical scheme：
The compact fan-shaped section of enhancement mode is used under a kind of weight of continuous casting and solidifying end, the fan-shaped section is horizontal segment structure, including
It is arranged on inner frame in the fan-shaped section, outside framework, inner arc roller row, outer arc roller row, four clamping cylinders and two pressure cylinders；
The inner frame and the outside framework are oppositely arranged up and down, four clamping cylinders be each passed through the inner frame and
The corner of the outside framework is simultaneously fixedly connected with the inner frame and the outside framework, and the inner arc roller row are connected to the inside casing
On frame, the outer arc roller row are connected on the outside framework, and the inner arc roller row include at least five upper backup rolls, the outer arc
Roller row include at least five lower backing rolls, the upper backup roll and the lower backing roll using merogenesis roll structure, described upper
In support roller and the lower backing roll, at least one is driven roller, and remaining is driven voller, and described driven roller one end is connected with
Motor, the cylinder body of pressure cylinder are arranged on the inner frame, in the piston rod of the pressure cylinder and the upper backup roll
Driven roller is abutted；
Pressed compact power >=the 4500kN of each clamping cylinder, the pressed compact power >=1000kN of each pressure cylinder, the drive
Power >=the 22kw of galvanic electricity machine.
Preferably, the upper backup roll and the lower backing roll adopt four merogenesis roll structures, the lower backing roll to include
Three the first metamerism rollers being sequentially connected and second metamerism roller, the length of second metamerism roller are more than first merogenesis
The length of roller, two the second metamerism rollers in the two neighboring upper backup roll, one one end for being located at the outside framework are another
The individual other end positioned at the outside framework, the lower backing roll are identical with the upper backup roll structure.
Preferably, between the two neighboring upper backup roll spacing between spacing or the two neighboring lower backing roll
≤ 25mm.
Preferably, aerosol is provided with and the two neighboring lower backing roll between the two neighboring upper backup roll
Cooling nozzles, the mouth water yield >=1.5l/min of the aerosol cooling nozzles.
Preferably, the roll neck >=380mm of the driven roller, the roll neck >=350mm of the driven voller.
Preferably, the upper backup roll and the lower backing roll are five, first and the 3rd upper backup roll
And first and the 3rd lower backing roll are driven roller, or the 3rd and the 5th upper backup roll and the 3rd and the
Five lower backing rolls are driven roller, or first, the 3rd and the 5th upper backup roll and first, the 3rd and
5th lower backing roll is driven roller, and the pressure cylinder is connected with the 3rd upper backup roll.
Preferably, the upper backup roll and the lower backing roll are six or seven, the 4th upper backup roll and
4th lower backing roll is driven roller, and the pressure cylinder is connected with the 4th upper backup roll.
Continuous casting and solidifying end can be obviously improved with the compact fan-shaped section of enhancement mode under the continuous casting and solidifying end weight that the present invention is provided
End drafts, is capable of achieving single-point pressure and continuous pressure, ensures the smooth pull-out of strand during pressure.And persistently depress and can fill
Point using fan-shaped section lasting pressure feature, prevent strand rebound deformation, while ensureing inside and outside strand center portion during samming
With green shell synchronous, it is to avoid loose, solidification end pressure ability is improved, it is ensured that the stable of weight soft reduction process is effectively implemented.This
Fan-shaped section in invention its feature is strongr than ordinary sector segment structure, there is provided pressure it is bigger, bigger pressure can be completed
Effect, so as to ensure the enforcement under weight.
Description of the drawings
Fig. 1 is the structural representation under the continuous casting and solidifying end weight of the embodiment of the present invention 1 with the compact fan-shaped section of enhancement mode；
Fig. 2 is the front view under the continuous casting and solidifying end weight of the embodiment of the present invention 1 with the compact fan-shaped section of enhancement mode；
Fig. 3 locates for the consistency of embodiment 2；
Fig. 4 is the consistency testing result on 1/4 line position of embodiment 2；
Fig. 5 is the consistency testing result on 1/2 line position of embodiment 2.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is further described.Following examples are only used for more
Technical scheme is clearly demonstrated, and can not be limited the scope of the invention with this.
Embodiment 1
The invention provides the compact fan-shaped section of enhancement mode under a kind of weight of continuous casting and solidifying end, is used, it is concrete such as Fig. 1 and Fig. 2 institutes
Show, fan-shaped section is horizontal segment structure, i.e. its roller row are horizontally disposed, including the inner frame 1, outside framework 2 being arranged in fan-shaped section, interior
Arc roller row, outer arc roller row, four clamping cylinders 5 and two pressure cylinders 6.Wherein, clamping cylinder 5 is hydraulic cylinder, plays regulation fan-shaped section
Taper, implements the technique purpose under weight.
Inner frame 1 and outside framework are oppositely arranged about 2, and four clamping cylinders 5 are each passed through the four of inner frame 1 and outside framework 2
Angle is simultaneously fixedly connected with inner frame 1 and outside framework 2, and the inner frame 1 and outside framework 2 of fan-shaped section have the spy of high intensity and rigidity
Point, during ensureing pressure, frame deformation is controlled in the reasonable scope.Inner arc roller row are connected on inner frame 1, and outer arc roller row connect
It is connected on outside framework 2, inner arc roller row include at least five upper backup rolls 3, outer arc roller row include at least five lower backing rolls 4, on
Support roller 3 and lower backing roll 4 adopt merogenesis roll structure, and in upper backup roll 3 and lower backing roll 4, at least one is driving
Roller, remaining is driven voller, and driven roller one end is connected with motor, and the cylinder body of pressure cylinder 6 is arranged on inner frame 1, pressure
The piston rod of cylinder 6 is abutted with the driven roller in upper backup roll 3.
Upper backup roll 3 and lower backing roll 4 adopt four merogenesis roll structures, lower backing roll 4 include being sequentially connected three the
Length of the length of one metamerism roller 4-1 and a second metamerism roller 4-2, the second metamerism roller 4-2 more than the first metamerism roller 4-1, phase
Two the second metamerism roller 4-2 in adjacent two upper backup rolls 3, mono- one end for being located at outside framework 2, another is located at outside framework 2
The other end, lower backing roll 4 are identical with 3 structure of upper backup roll, i.e., two neighboring upper backup roll 3 or two neighboring lower backing roll 4
The equal interlaced arrangement of metamerism roller, metamerism roller interlaced arrangement also can be by under latter roll-ins with ensure bearing block position strand.
Further, the design parameter in the present embodiment includes：Spacing between two neighboring upper backup roll 3 and adjacent two
Spacing between individual lower backing roll 4≤25mm, between two neighboring upper backup roll 3 and two neighboring lower backing roll 4 between
Aerosol cooling nozzles are provided with, the mouth water yield >=1.5l/min of aerosol cooling nozzles, to ensure roll surface temperature≤200 DEG C, is improved
The casting roll life-span.Roll neck >=the 380mm of driven roller, the present embodiment is 390mm, the roll neck >=350mm of driven voller, the work(of motor
Rate >=22kw, to guarantee the smooth throwing during depressing；Each 5 pressed compact power of clamping cylinder >=4500kN, it is ensured that heavy reduction
Implement；Each 6 pressed compact power of pressure cylinder >=1000kN, realizes independent press function, and pressure cylinder be equipped with pressure, displacement transducer with
Corresponding regulating valve, to realize the demand of pressure, displacement compound control.
To realize smoothly penetrating and pull-out for dummy bar, the driven roller peace being pointed in the upper backup roll 3 in the middle of fan-shaped section
Independent pressure cylinder 6 is filled, and during dummy ingot being ensured by the pressure of pressure cylinder 6, driven roller can compress dummy bar, realize dummy bar
Smoothly penetrate and pull-out.
Specifically, when upper backup roll 3 and lower backing roll 4 are five, first and the 3rd upper backup roll 3 and first
It is driven roller with the 3rd lower backing roll 4；
Or the 3rd and the 5th upper backup roll 3 and the 3rd and the 5th lower backing roll 4 are driven roller；
Or first, the 3rd and the 5th upper backup roll 3 and first, the 3rd and the 5th lower backing roll 4 are
Driven roller, pressure cylinder 6 are connected with the 3rd upper backup roll 3.
When upper backup roll 3 and lower backing roll 4 are six or seven, the 4th upper backup roll 3 and the 4th lower backing roll 4
Driven roller is, pressure cylinder 6 is connected with the 4th upper backup roll 3.
Meanwhile, the fan-shaped section clamping cylinder 5 and pressure cylinder 6 that the present embodiment is provided is equipped with pressure transducer, displacement transducer
With corresponding governor motion, to realize pressure, displacement compound demand for control.
The present embodiment is applied to slab caster, and its strand width is 1.0m-3.5m, and slab thickness is 120mm-600mm.
Embodiment 2
Certain wide thickness plate continuous casting machine cross dimensions 2100mm × 280mm, horizontal segment strengthen fan-shaped section by 5 compacts and constitute,
That is 9#-13# sections.Fan-shaped segment length 2.1m, each fan-shaped section are made up of 5 pairs of up-down rollers, first upper backup roll 3 and first
Lower backing roll 4 is driven roller, and other rollers are the driven roller of driven voller, roll neck 390mm of driven roller, inner arc roller row and outer arc roller row
One end is mounted on 22kW motors, and two pressure cylinders 6 are provided with the driven roller of inner arc roller row, and pressure cylinder 6 is hydraulic cylinder,
Single hydraulic cylinder maximum pressure 1320kN.4 corners of fan-shaped section inner frame are mounted on four clamping cylinders 5, and single clamping cylinder 4 is most
Big pressure 4750kN.Clamping cylinder 5 is equipped with pressure, displacement transducer with pressure cylinder 6, is capable of achieving fan-shaped section pressure, the control of displacement.
Concrete reduction method is comprised the following steps：
From opening and pouring, with strand constantly moving ahead along throwing direction, Coagulated hemothorax is gradually moved afterwards, and two-phase section gradually prolongs
Stretch.When casting blank solidification forward position meets pressure condition, two clamping cylinders 5 of fan-shaped section outlet start to push.During pressure, fan
The outside framework 2 of shape section is integrally fixed on foundation beam, is kept constant, and due to the pressure of outlet hydraulic cylinder, is made fan-shaped section inside casing
Frame 1 is upwardly formed taper, i.e. fan-shaped section outlet roll gap in throwing side with outside framework 2 and is less than fan-shaped section entrance roll gap, so as to pass through
Roll gap taper completes the squeezing action to strand.Further, as the continuation of solidification front moves ahead, the hydraulic cylinder of next fan-shaped section
6 also begin to it is servo-actuated push, until solidification end position is stable, multiple fan-shaped sections put into press function.
In pulling rate change procedure, depressing position should be with the reach of solidification end position or rear shifting, in the process, fan
Shape section according to receive gap preset instruction, by the pressure to hydraulic cylinder 6 with lift adjustment, complete the adjustment of roll gap.
The technological parameters such as concrete drafts, pressure range are required by different casting conditions and finished product and particular technique is obtained.
Single fan-shaped section after fan-shaped section is strengthened using compact and, in Coagulated hemothorax maximum reduction >=15mm, has ensured solidification
Effective enforcement under the weight of end.Under weight after technology implementation, strand consistency is greatly improved, for the thick hot rolled plate of 50mm
100% is promoted to less than 20% by original without flaw detection qualification rate under rear heap cool condition is rolled.As shown in Figures 3 to 5, give cause
The sample position of the improvement of density, wherein Fig. 2 for strand transverse section, Fig. 4 and Fig. 5 is respectively wide on 1/2 and 1/4 height
Consistency comparing result after implementing under slighter compress and weight.As can be seen that either 1/2 position or 1/4 position, using weight
After pressure, strand consistency has obtained overall lifting.As strand corner true density is generally peak, therefore the densification of each point
Degree computational methods are the true density/corner point true density of the point.
The embodiment described above only present invention preferably specific embodiment, protection scope of the present invention not limited to this,
Any those of ordinary skill in the art in the technical scope of present disclosure, the technical scheme that can be become apparent to
Simple change or equivalence replacement, belong to protection scope of the present invention.
Claims (7)
1. the compact fan-shaped section of enhancement mode is used under a kind of weight of continuous casting and solidifying end, it is characterised in that the fan-shaped section is horizontal segment
Structure, including inner frame (1), outside framework (2), the inner arc roller row, outer arc roller row, four clamping cylinders that are arranged in the fan-shaped section
And two pressure cylinders (6) (5)；
The inner frame (1) and the outside framework (2) are oppositely arranged up and down, and four clamping cylinders (5) are each passed through in described
The corner of framework (1) and the outside framework (2) is simultaneously fixedly connected with the inner frame (1) and the outside framework (2), the inner arc
Roller row are connected on the inner frame (1), and the outer arc roller row are connected on the outside framework (2), and the inner arc roller row include
At least five upper backup rolls (3), outer arc roller row include at least five lower backing rolls (4), the upper backup roll (3) and described
Lower backing roll (4) adopts merogenesis roll structure, and in the upper backup roll (3) and the lower backing roll (4), at least one is
Driven roller, remaining is driven voller, and described driven roller one end is connected with motor, and the cylinder body of the pressure cylinder (6) is arranged on
On the inner frame (1), the piston rod of the pressure cylinder (6) is abutted with the driven roller in the upper backup roll (3)；
Pressed compact power >=the 4500kN of each clamping cylinder (5), the pressed compact power >=1000kN of each pressure cylinder (6), it is described
Power >=the 22kw of motor.
2. the compact fan-shaped section of enhancement mode is used under the weight of continuous casting and solidifying end according to claim 1, it is characterised in that described
Upper backup roll (3) and the lower backing roll (4) adopt four merogenesis roll structures, and the lower backing roll (4) is including what is be sequentially connected
Three the first metamerism rollers (4-1) and second metamerism roller (4-2), the length of second metamerism roller (4-2) is more than described the
The length of one metamerism roller (4-1), two the second metamerism rollers (4-2) in the two neighboring upper backup roll (3) are located at institute
One end of outside framework (2) is stated, another is located at the other end of the outside framework (2), the lower backing roll (4) and the upper support
Roller (3) structure is identical.
3. the compact fan-shaped section of enhancement mode is used under the weight of continuous casting and solidifying end according to claim 1, it is characterised in that adjacent
The spacing between spacing or the two neighboring lower backing roll (4) between two upper backup rolls (3)≤25mm.
4. the compact fan-shaped section of enhancement mode is used under the weight of continuous casting and solidifying end according to claim 1, it is characterised in that adjacent
Aerosol cooling nozzles are provided with and the two neighboring lower backing roll (4) between two upper backup rolls (3), it is described
The mouth water yield >=the 1.5l/min of aerosol cooling nozzles.
5. the compact fan-shaped section of enhancement mode is used under the weight of continuous casting and solidifying end according to claim 1, it is characterised in that described
Roll neck >=the 380mm of driven roller, the roll neck >=350mm of the driven voller.
6. the compact fan-shaped section of enhancement mode is used under the weight of continuous casting and solidifying end according to claim 1, it is characterised in that described
Upper backup roll (3) and the lower backing roll (4) are five, first and the 3rd upper backup roll (3) and first and
3rd lower backing roll (4) is driven roller, or the 3rd and the 5th upper backup roll (3) and the 3rd and the 5th
The lower backing roll (4) is driven roller, or first, the 3rd and the 5th upper backup roll (3) and first, the 3rd
Driven roller is with the 5th lower backing roll (4), the pressure cylinder (6) is connected with the 3rd upper backup roll (3).
7. the compact fan-shaped section of enhancement mode is used under the weight of continuous casting and solidifying end according to claim 1, it is characterised in that described
Upper backup roll (3) and the lower backing roll (4) are six or seven, described in the 4th upper backup roll (3) and the 4th
Lower backing roll (4) is driven roller, and the pressure cylinder (6) is connected with the 4th upper backup roll (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611063063.7A CN106552912A (en) | 2016-11-28 | 2016-11-28 | The compact fan-shaped section of enhancement mode is used under a kind of weight of continuous casting and solidifying end |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611063063.7A CN106552912A (en) | 2016-11-28 | 2016-11-28 | The compact fan-shaped section of enhancement mode is used under a kind of weight of continuous casting and solidifying end |
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Cited By (5)
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| CN108788041A (en) * | 2018-07-03 | 2018-11-13 | 东北大学 | Fan-shaped section roll array structure and application method are used under a kind of weight of continuous casting and solidifying end |
| CN109434056A (en) * | 2018-12-05 | 2019-03-08 | 东北大学 | A kind of double single-point weight soft reduction process of continuous casting billet solidifying end |
| CN109434053A (en) * | 2018-11-21 | 2019-03-08 | 中冶南方连铸技术工程有限责任公司 | The big pressure fan-shaped section of sheet billet continuous casting |
| CN109465415A (en) * | 2018-12-07 | 2019-03-15 | 东北大学 | Fan-shaped section roll array structure under a kind of double single-point weight in continuous casting and solidifying end |
| CN110227806A (en) * | 2019-05-27 | 2019-09-13 | 北京首钢国际工程技术有限公司 | Large screw-down device for solidification tail end of cast-rolling continuous casting machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108788041A (en) * | 2018-07-03 | 2018-11-13 | 东北大学 | Fan-shaped section roll array structure and application method are used under a kind of weight of continuous casting and solidifying end |
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| CN110227806A (en) * | 2019-05-27 | 2019-09-13 | 北京首钢国际工程技术有限公司 | Large screw-down device for solidification tail end of cast-rolling continuous casting machine |
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Application publication date: 20170405 |