CN105689664B - Fan-shaped section and its application method under weight for improving the loose shrinkage cavity defect of slab - Google Patents
Fan-shaped section and its application method under weight for improving the loose shrinkage cavity defect of slab Download PDFInfo
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- CN105689664B CN105689664B CN201410695742.0A CN201410695742A CN105689664B CN 105689664 B CN105689664 B CN 105689664B CN 201410695742 A CN201410695742 A CN 201410695742A CN 105689664 B CN105689664 B CN 105689664B
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Abstract
Casting ingot is post-processed at the scene during the present invention relates to for continuous casting of metal or the auxiliary device field of post-processing, fan-shaped section and its application method under specially a kind of weight for being used to improving the loose shrinkage cavity defect of slab.Fan-shaped section under a kind of weight for improving the loose shrinkage cavity defect of slab, including upper framework (11) and underframe (12), it is characterized in that：Also include big a pair free roll (21), a pair of driven rollers (22), at least three pairs of freedom in minor affairs rollers (23), big free roll pressure oil cylinder (31), cross cylinder (32), driven roller pressure oil cylinder (33) and water pipe (4).The application method of fan-shaped section under a kind of weight for improving the loose shrinkage cavity defect of slab, it is characterized in that：Implement as follows：Traction strand enters scalloped end；Extruding, the drafts not less than 10mm is applied to strand；Traction strand goes out fan-shaped section.Slab quality of the present invention is high, and loose and shrinkage cavity defect is few.
Description
Technical field
Casting ingot is post-processed at the scene during the present invention relates to for continuous casting of metal or post-processing it is attached
Apparatus field, it is specially a kind of to be used to improve fan-shaped section and its application method under the weight of the loose shrinkage cavity defect of slab.
Background technology
The problem of generous continuous casting steel billet generally existing inside center segregation, center porosity and shrinkage cavity, cause the quality of strand
Defect, have a strong impact on the mechanical performance of steel.It facts have proved that dynamic soft reduction technology can efficiently solve strand inside center
Segregation problems, but for strand internal defect with then being produced little effect the problem of shrinkage cavity.In order to solve strand internal defect and shrinkage cavity
The problem of, widespread practice is to increase the compression ratio in the strand operation of rolling at present, but this in turn limits the thickness of slab stocking.
Research finds that internal defect and the shrinkage cavity of strand are mainly formed in the end of strand wick-containing solidification, therefore, are casting
Apply the drafts of more than 10mm reduced down in thickness at base solidified tail end of liquid core to strand, can by the extruding to strand herein
Center porosity is set just to be pressed in its formation stages with shrinkage cavity, so as to eliminate this casting blank defect.By this technology, not only may be used
To eliminate the internal defect of strand and shrinkage cavity, the internal soundness of strand is improved, it is ensured that the mechanical performance of steel, can also be effectively
The compression ratio of the strand operation of rolling is reduced, improves the thickness of becoming a useful person of steel plate.But by being limited by structural shape, plate at present
The various fan-shaped sections of billet continuous casting machine are unable to meet the drafts that single fan-shaped section implements strand more than 10mm.
The content of the invention
The defects of in order to overcome prior art, there is provided a kind of slab quality is high, loose and few shrinkage cavity defect casting auxiliary
Equipment, the invention discloses fan-shaped section and its application method under a kind of weight for improving the loose shrinkage cavity defect of slab.
The present invention reaches goal of the invention by following technical solution：
Fan-shaped section under a kind of weight for improving the loose shrinkage cavity defect of slab, including upper framework and underframe, upper framework
Located at the surface of underframe, two pairs of compression hydraulic cylinders are respectively hinged upper framework and underframe by connecting shaft and oscillating bearing
Together, it is characterized in that：Also include big a pair free roll, a pair of driven rollers, at least three pairs of freedom in minor affairs rollers, big free roll pressure oil
Cylinder, cross cylinder, driven roller pressure oil cylinder and water pipe,
The bottom of upper framework is rotationally sequentially provided with one big free roll, a driven roller and at least three by bearing
Freedom in minor affairs roller, the top of underframe are rotationally sequentially provided with one big free roll, a driven roller and at least three by bearing
Root freedom in minor affairs roller, the central axis of big free roll, driven roller and freedom in minor affairs roller is all parallel to each other, big a pair free roll, a pair of drives
The roll surface of dynamic roller and each pair of freedom in minor affairs roller mutually faces；
The cylinder body of big free roll pressure oil cylinder is fixed on framework, and the mobile terminal of big free roll pressure cylinder piston rod is hung down
Directly set and connected with the big free roll located at upper base of frame down, the cylinder body of cross cylinder is fixed on underframe, horizontal
The mobile terminal of cylinder piston rod it is horizontally disposed and and the connection of one of a pair wedge slide blocks mutually to be fitted with inclined-plane, another piece is tiltedly
Slider wedge connects with the big free roll at the top of underframe；
The cylinder body of driven roller pressure oil cylinder is fixed on framework, and driven roller depresses the vertical court in mobile terminal of cylinder piston rod
It is lower to set and connected with the driven roller located at upper base of frame；
The cylinder body of oil cylinder is fixed on framework under freedom in minor affairs roll-in, and the mobile terminal of freedom in minor affairs roll-in lower oil cylinder piston bar is hung down
Directly set and connected with each freedom in minor affairs roller located at upper base of frame down；
One end connection water tank of water pipe, the other end difference through connection big free roll pressure oil cylinder of water pipe, cross cylinder,
Driven roller depresses the inner chamber of oil cylinder under oil cylinder and freedom in minor affairs roll-in.
Fan-shaped section under the described weight for being used to improve the loose shrinkage cavity defect of slab, it is characterized in that：
Big free roll and freedom in minor affairs roller all use the structure of the metamerism roller of mandrel type three, and driven roller all uses the merogenesis of mandrel type four
The structure of roller, located at the edge bearing of big free roll, freedom in minor affairs roller and driven roller both ends all use one end for aligning roller bearing,
The other end is three circle bearings, and the intermediate bearing in the middle part of big free roll, freedom in minor affairs roller and driven roller is all using two three circle axles
Hold；
Big free roll, freedom in minor affairs roller and driven roller and the axle located at big free roll, freedom in minor affairs roller and driven roller upper bearing (metal)
Bearing all uses internal water flowing to cool down, and the inner chamber of big free roll, freedom in minor affairs roller and driven roller is all connected by external rotary joint
Water receiving pipe；After big free roll and freedom in minor affairs roller install, cooling water is injected by water pipe turn on automatically, is reduced on fan-shaped section machine
Pipe arrangement, fan-shaped section it is simple for structure；One end mounting flange of driven roller, can be universal with fan-shaped section drive device by flange
Shaft coupling directly connects, and two stream fan-shaped sections can exchange completely, reduce the spare part amount of fan-shaped section.
Fan-shaped section under the described weight for being used to improve the loose shrinkage cavity defect of slab, it is characterized in that：Big free roll cross section
A diameter of R, the diameter of driven roller and freedom in minor affairs roller cross section is all r, and r >=200mm, R value are [2r, 2.5r].
The application method of fan-shaped section under the described weight for being used to improve the loose shrinkage cavity defect of slab, it is characterized in that：By such as
Lower step is implemented：
Entrance side of the roll gap as fan-shaped section between big a pair free roll, outermost a pair of freedom in minor affairs roller is as fan-shaped
The outlet side of section, strand enter scalloped end from entrance side；
Conticaster is adjusted to the hauling speed of strand, the solidified tail end of liquid core of strand is between big a pair free roll
During roll gap, start big free roll pressure oil cylinder, the piston rod of big free roll pressure oil cylinder is pushed down on located at upper base of frame
Big free roll；Start cross cylinder simultaneously, the piston rod of cross cylinder is promoted the wedge slide block of horizontal direction, pass through wedge
Active force between sliding block inclined-plane, horizontal impulse is changed into the big free roll that is applied at the top of underframe it is vertical to
On driving force, big a pair free roll is extruded strand jointly, by common extruding of big a pair free roll to strand, to strand
Apply the drafts not less than 10mm；
After extruding, strand exports under the traction of conticaster from the outlet side of fan-shaped section.
The invention provides fan-shaped section under a kind of brand-new weight, realize eliminate shrinkage cavity inside strand with it is loose, carry
The internal soundness of high continuous casting billet, it is ensured that the mechanical performance of rolled plate, while reduce the purpose of its rolling reduction, available for giving birth to
Produce the higher rolling steel plate of thickness.
The beneficial effects of the invention are as follows：Slab quality is high, and loose and shrinkage cavity defect is few.
Brief description of the drawings
Fig. 1 is the front view of the present invention；
Fig. 2 is Fig. 1 K direction views；
Fig. 3 is the connection diagram of cross cylinder, wedge slide block and big free roll.
Embodiment
The present invention is further illustrated below by way of specific embodiment.
Embodiment 1
It is a kind of to be used to improving fan-shaped section under the weight of the loose shrinkage cavity defect of slab, including upper framework 11, underframe 12, a pair
Big free roll 21, a pair of driven rollers, 22, three pairs of freedom in minor affairs rollers 23, big free roll pressure oil cylinder 31, cross cylinder 32, driving roll-in
Lower oil cylinder 33 and water pipe 4, as depicted in figs. 1 and 2, concrete structure is：
Upper framework 11 is located at the surface of underframe 12, two pairs of compression hydraulic cylinders by connecting shaft and oscillating bearing respectively
Upper framework 11 and underframe 12 are hinged；Upper framework 11 and underframe 12 all use vertical plate type structure, have high intensity and
Rigidity, meet to implement the gap preset regulation under weight and require that vertical plate type structure permeability is good, and thermal deformation resistant ability is strong, favorably
In the installation of di-cold spray nozzle, while the accumulation of underframe iron scale and secondary cooling water is avoided, the phenomenon of roller stall will not be produced；
The bottom of upper framework 11 is rotationally sequentially provided with one big 21, driven rollers 22 of free roll and extremely by bearing
Few three freedom in minor affairs rollers 23, the top of underframe 12 are rotationally sequentially provided with one big 21, drives of free roll by bearing
Dynamic roller 22 and three freedom in minor affairs rollers 23, the bearing block installation surface build-up welding stainless steel of bearing, pipe arrangement and nozzle holder in fan-shaped section
It is stainless steel, reduces the maintenance of whole fan-shaped section, the central axis of big free roll 21, driven roller 22 and freedom in minor affairs roller 23 is all
Parallel to each other, the roll surface of big a pair free roll 21, a pair of driven rollers 22 and each pair of freedom in minor affairs roller 23 mutually faces；
The cylinder body of big free roll pressure oil cylinder 31 is fixed on framework 11, the shifting of the big free roll pressure piston rod of oil cylinder 31
Moved end is set and connected with the big free roll 21 located at the upper bottom of framework 11 vertically downward, and the cylinder body of cross cylinder 32 is fixed on down
On framework 12, as shown in figure 3, the mobile terminal of the piston rod of cross cylinder 32 is horizontally disposed and and is mutually fitted with inclined-plane for a pair oblique
One of slider wedge 321 connects, and another piece of wedge slide block 321 and the big free roll 21 located at the top of underframe 12 connect；
The cylinder body of driven roller pressure oil cylinder 33 is fixed on framework 11, and driven roller depresses the mobile terminal of the piston rod of oil cylinder 33
Set and connected with the driven roller 22 located at the upper bottom of framework 11 vertically downward；
The cylinder body of oil cylinder 34 is fixed on framework 11 under freedom in minor affairs roll-in, the shifting of the piston rod of oil cylinder 34 under freedom in minor affairs roll-in
Moved end sets and connected with each freedom in minor affairs roller 23 located at the upper bottom of framework 11 vertically downward；
One end connection water tank of water pipe 4, the big free roll pressure oil cylinder 31 of other end difference through connection of water pipe 4, level
The inner chamber of oil cylinder 34 under oil cylinder 32, driven roller pressure oil cylinder 33 and freedom in minor affairs roll-in.
In the present embodiment, big free roll 21 and freedom in minor affairs roller 23 all use the structure of the metamerism roller of mandrel type three, driven roller 22
The structure of the metamerism roller of mandrel type four is all used, located at the edge bearing of big free roll 21, freedom in minor affairs roller 23 and the both ends of driven roller 22
It for aligning roller bearing, the other end is three circle bearings all to use one end, located at big free roll 21, freedom in minor affairs roller 23 and driven roller 22
The intermediate bearing at middle part is all using two three circle bearings；
Big free roll 21, freedom in minor affairs roller 23 and driven roller 22 and located at big free roll 21, freedom in minor affairs roller 23 and driven roller
The bearing block of 22 upper bearing (metal)s all uses internal water flowing to cool down, and the inner chamber of big free roll 21, freedom in minor affairs roller 23 and driven roller 22 is all logical
Cross external rotary joint connecting water pipe 4；After big free roll 21 and freedom in minor affairs roller 23 install, cooling water is automatic by water pipe 4
Connect injection, reduce pipe arrangement on fan-shaped section machine, fan-shaped section it is simple for structure；One end mounting flange of driven roller 22, passes through method
Orchid can directly connect with the Hooks coupling universal coupling of fan-shaped section drive device, and two stream fan-shaped sections can exchange completely, reduce sector
The spare part amount of section.
If the diameter of a diameter of R of the big cross section of free roll 21, driven roller 22 and the cross section of freedom in minor affairs roller 23 is all r, then r
>=200mm, R value are [2r, 2.5r], in the present embodiment, R=500mm, r=230mm.
The present embodiment in use, implement as follows：
Entrance side of the roll gap as fan-shaped section between big a pair free roll 21, the outermost conduct of a pair of freedom in minor affairs roller 23
The outlet side of fan-shaped section, strand enter scalloped end from entrance side, and the conveying direction of casting is as shown in the hollow arrow in Fig. 1；
Conticaster is adjusted to the hauling speed of strand, the solidified tail end of liquid core of strand is between big a pair free roll 21
Roll gap when, start big free roll pressure oil cylinder 31, the piston rod of big free roll pressure oil cylinder 31 is pushed down on located at upper ledge
The big free roll 21 of the bottom of frame 11；Start cross cylinder 32 simultaneously, the piston rod of cross cylinder 32 is promoted the oblique of horizontal direction
Slider wedge 321, by the active force between the inclined-plane of wedge slide block 321, horizontal impulse is changed into and is applied to located at underframe
The driving force vertically upward of the big free roll 21 at 12 tops, makes big a pair free roll 21 extrude strand jointly, big by a pair
Common extruding of the free roll 21 to strand, the drafts not less than 10mm is applied to strand；
Fan-shaped section uses the control mode of long-range roll gap adjustment under weight, and two pairs of compression hydraulic cylinders are arranged in the two of fan-shaped section
Individual side, and with displacement transducer, by servo valve control, realize technological operation under weight；Pressure is provided with hydraulic valve platform to pass
Sensor, carry out pressure and show；
After extruding, strand exports under the traction of conticaster from the outlet side of fan-shaped section.
Claims (5)
1. fan-shaped section under a kind of weight for improving the loose shrinkage cavity defect of slab, including upper framework (11) and underframe (12),
Upper framework (11) is located at the surface of underframe (12), and two pairs of compression hydraulic cylinders are by connecting shaft and oscillating bearing respectively upper ledge
Frame (11) and underframe (12) are hinged, it is characterized in that：Also include big a pair free roll (21), a pair of driven rollers (22),
At least three pairs of freedom in minor affairs rollers (23), big free roll pressure oil cylinder (31), cross cylinder (32), driven roller pressure oil cylinder (33) and water
Manage (4),
The bottom of upper framework (11) be rotationally sequentially provided with by bearing one big free roll (21), a driven roller (22) and
At least three freedom in minor affairs rollers (23), the top of underframe (12) are rotationally sequentially provided with a big free roll by bearing
(21), a driven roller (22) and at least three freedom in minor affairs rollers (23), big free roll (21), driven roller (22) and freedom in minor affairs roller
(23) central axis is all parallel to each other, big a pair free roll (21), a pair of driven rollers (22) and each pair of freedom in minor affairs roller (23)
Roll surface mutually faces；
The cylinder body of big free roll pressure oil cylinder (31) is fixed on framework (11), big free roll pressure oil cylinder (31) piston rod
Mobile terminal sets and connected with the big free roll (21) located at upper framework (11) bottom, the cylinder body of cross cylinder (32) vertically downward
It is fixed on underframe (12), what the mobile terminal of cross cylinder (32) piston rod was horizontally disposed with and mutually fitted with inclined-plane with a pair
One of wedge slide block (321) connects, another piece of wedge slide block (321) and the big free roll (21) at the top of underframe (12)
Connection；
The cylinder body of driven roller pressure oil cylinder (33) is fixed on framework (11), and driven roller depresses the movement of oil cylinder (33) piston rod
End sets and connected with the driven roller (22) located at upper framework (11) bottom vertically downward；
The cylinder body of oil cylinder (34) is fixed on framework (11) under freedom in minor affairs roll-in, oil cylinder (34) piston rod under freedom in minor affairs roll-in
Mobile terminal sets and connected with each freedom in minor affairs roller (23) located at upper framework (11) bottom vertically downward；
One end connection water tank of water pipe (4), the big free roll pressure oil cylinder (31) of other end difference through connection of water pipe (4), water
The inner chamber of oil cylinder (34) under flat oil cylinder (32), driven roller pressure oil cylinder (33) and freedom in minor affairs roll-in.
2. fan-shaped section under the weight as claimed in claim 1 for improving the loose shrinkage cavity defect of slab, it is characterized in that：
Big free roll (21) and freedom in minor affairs roller (23) all use the structure of the metamerism roller of mandrel type three, and driven roller (22) all uses mandrel
The structure of the metamerism roller of formula four, the edge bearing located at big free roll (21), freedom in minor affairs roller (23) and driven roller (22) both ends are all adopted
Be aligning roller bearing with one end, the other end be three circle bearings, located at big free roll (21), freedom in minor affairs roller (23) and driven roller
(22) intermediate bearing in the middle part of is all using two three circle bearings；
Big free roll (21), freedom in minor affairs roller (23) and driven roller (22) and located at big free roll (21), freedom in minor affairs roller (23) and
The bearing block of driven roller (22) upper bearing (metal) all uses internal water flowing to cool down, big free roll (21), freedom in minor affairs roller (23) and driven roller
(22) inner chamber all passes through external rotary joint connecting water pipe (4).
3. fan-shaped section under the weight as claimed in claim 1 or 2 for improving the loose shrinkage cavity defect of slab, it is characterized in that：Greatly
The diameter of a diameter of R of free roll (21) cross section, driven roller (22) and freedom in minor affairs roller (23) cross section is all r, r >=200mm,
R value is [2r, 2.5r].
4. the application method of fan-shaped section under the weight as claimed in claim 1 or 2 for improving the loose shrinkage cavity defect of slab, its
It is characterized in：Implement as follows：
Entrance side of the roll gap as fan-shaped section between big a pair free roll (21), outermost a pair of freedom in minor affairs roller (23) conduct
The outlet side of fan-shaped section, strand enter scalloped end from entrance side；
Conticaster is adjusted to the hauling speed of strand, the solidified tail end of liquid core of strand is between big a pair free roll (21)
During roll gap, start big free roll pressure oil cylinder (31), the piston rod of big free roll pressure oil cylinder (31) is pushed down on located at upper
The big free roll (21) of framework (11) bottom；Start cross cylinder (32) simultaneously, the piston rod of cross cylinder (32) is promoted water
Square to wedge slide block (321), by the active force between wedge slide block (321) inclined-plane, horizontal impulse is changed into and applied
The driving force vertically upward for the big free roll (21) being added at the top of underframe (12), make big a pair free roll (21) common
Strand is extruded, by common extruding of big a pair free roll (21) to strand, the drafts not less than 10mm is applied to strand；
After extruding, strand exports under the traction of conticaster from the outlet side of fan-shaped section.
5. the application method of fan-shaped section under the weight as claimed in claim 3 for improving the loose shrinkage cavity defect of slab, it is special
Sign is：Implement as follows：
Entrance side of the roll gap as fan-shaped section between big a pair free roll (21), outermost a pair of freedom in minor affairs roller (23) conduct
The outlet side of fan-shaped section, strand enter scalloped end from entrance side；
Conticaster is adjusted to the hauling speed of strand, the solidified tail end of liquid core of strand is between big a pair free roll (21)
During roll gap, start big free roll pressure oil cylinder (31), the piston rod of big free roll pressure oil cylinder (31) is pushed down on located at upper
The big free roll (21) of framework (11) bottom；Start cross cylinder (32) simultaneously, the piston rod of cross cylinder (32) is promoted water
Square to wedge slide block (321), by the active force between wedge slide block (321) inclined-plane, horizontal impulse is changed into and applied
The driving force vertically upward for the big free roll (21) being added at the top of underframe (12), make big a pair free roll (21) common
Strand is extruded, by common extruding of big a pair free roll (21) to strand, the drafts not less than 10mm is applied to strand；
After extruding, strand exports under the traction of conticaster from the outlet side of fan-shaped section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410695742.0A CN105689664B (en) | 2014-11-27 | 2014-11-27 | Fan-shaped section and its application method under weight for improving the loose shrinkage cavity defect of slab |
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| CN201410695742.0A CN105689664B (en) | 2014-11-27 | 2014-11-27 | Fan-shaped section and its application method under weight for improving the loose shrinkage cavity defect of slab |
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| CN105689664B true CN105689664B (en) | 2017-11-28 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106552912A (en) * | 2016-11-28 | 2017-04-05 | 东北大学 | The compact fan-shaped section of enhancement mode is used under a kind of weight of continuous casting and solidifying end |
| CN106623834B (en) * | 2016-12-22 | 2019-04-05 | 中冶京诚工程技术有限公司 | Fan-shaped section apparatus under continuous casting steel billet weight |
| CN109848383B (en) * | 2017-11-30 | 2020-12-22 | 宝山钢铁股份有限公司 | Flexible reduction method for improving internal quality of casting blank |
| CN109926554A (en) * | 2017-12-19 | 2019-06-25 | 宝钢工程技术集团有限公司 | A kind of fan-shaped section and its application method of improvement and elimination slab internal defect |
| CN108194447A (en) * | 2018-03-30 | 2018-06-22 | 宝钢工程技术集团有限公司 | The hydraulic system controlled for fan-shaped section under slab continuous casting weight |
| CN108788041B (en) * | 2018-07-03 | 2020-01-03 | 东北大学 | Sector section roller row structure for continuous casting solidification tail end heavy pressing and using method |
| 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 |
| 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 |
| CN109821897A (en) * | 2019-02-26 | 2019-05-31 | 江苏飞达环保科技有限公司 | A kind of rolling continuous cast blank with liquid core technique |
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| JP5779978B2 (en) * | 2010-05-31 | 2015-09-16 | Ｊｆｅスチール株式会社 | Light reduction method of slab in continuous casting |
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| CN201832970U (en) * | 2010-10-15 | 2011-05-18 | 江阴东辰机械制造有限公司 | Continuous-casting soft pressing device |
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