CN105689664A - Heavy reduction sector section used for overcoming plate blank looseness and shrinkage defects and application method thereof - Google Patents
Heavy reduction sector section used for overcoming plate blank looseness and shrinkage defects and application method thereof Download PDFInfo
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- CN105689664A CN105689664A CN201410695742.0A CN201410695742A CN105689664A CN 105689664 A CN105689664 A CN 105689664A CN 201410695742 A CN201410695742 A CN 201410695742A CN 105689664 A CN105689664 A CN 105689664A
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Abstract
The invention relates to the field of accessory equipment used for conducting posttreatment or postprocessing on cast blanks on site during metal continuous casting, in particular to a heavy reduction sector section used for overcoming the plate blank looseness and shrinkage defects and an application method thereof. The heavy reduction sector section used for overcoming the plate blank looseness and shrinkage defects comprises an upper frame (11) and a lower frame (12) and is characterized by further comprising a pair of big loose rolls (21), a pair of driving rolls (22), at least three pairs of small loose rolls (23), big loose roll reduction oil cylinders (31), horizontal oil cylinders (32), a driving roll reduction oil cylinder (33) and a water pipe (4). The application method of the heavy reduction sector section used for overcoming the plate blank looseness and shrinkage defects is characterized in that the method is implemented in the following steps that a casting blank is pulled into the sector section; extrusion is conducted, specifically, the rolling reduction no less than 10 mm is applied to the casting blank; and the casting blank is pulled out of the sector section. According to the heavy reduction sector section used for overcoming the plate blank looseness and shrinkage defects and the application method thereof, the quality of the casting blank is high, and the looseness and shrinkage defects barely occur.
Description
Technical field
At the scene casting ingot is carried out when the present invention relates to for continuous casting of metal the auxiliary device field of post processing or post-treatment, is specially fan-shaped section and using method thereof under a kind of weight for improving the loose shrinkage cavity defect of slab。
Background technology
The problem of generous continuous casting steel billet ubiquity inside center segregation, center porosity and shrinkage cavity, causes the mass defect of strand, has a strong impact on the mechanical performance of steel。Facts have proved that dynamic soft reduction technology can efficiently solve strand inside center segregation problems, but the problem for strand internal defect Yu shrinkage cavity then produces little effect。In order to solve the problem of strand internal defect and shrinkage cavity, current widespread practice is to strengthen the compression ratio in the strand operation of rolling, but this in turn limits the thickness of slab stocking。
Research finds, the internal defect of strand and shrinkage cavity are mainly formed in the end of strand wick-containing solidification, therefore, at strand solidified tail end of liquid core place, strand is applied the drafts of the reduced down in thickness of more than 10mm, by to strand extruding herein, center porosity and shrinkage cavity can be made just by pressing at its formation stages, thus eliminating this casting blank defect。By this technology, it is possible not only to eliminate internal defect and the shrinkage cavity of strand, improves the internal soundness of strand, it is ensured that the mechanical performance of steel, it is also possible to be effectively reduced the compression ratio of the strand operation of rolling, improve the thickness of becoming a useful person of steel plate。But, owing to being limit by structural shape, the various fan-shaped section of current slab caster are unable to meet single fan-shaped section and strand are implemented the drafts of more than 10mm。
Summary of the invention
In order to overcome the defect of prior art, it is provided that a kind of slab quality is high, equipment is assisted in loose and that shrinkage cavity defect is few casting, the invention discloses fan-shaped section and using method thereof 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 frame and underframe, upper frame is located at the surface of underframe, two pairs of compression hydraulic cylinder by connecting axle and oscillating bearing respectively hinged to upper frame and underframe, it is characterized in that: also include oil cylinder and water pipe under a pair big free roll, a pair driving roller, at least three pairs of freedom in minor affairs rollers, big free rolls pressure oil cylinder, cross cylinder, driving roll-ins
The bottom of upper frame is sequentially provided with a big free roll, a driving roller and at least three freedom in minor affairs rollers rotationally by bearing, the top of underframe is sequentially provided with a big free roll, a driving roller and at least three freedom in minor affairs rollers rotationally by bearing, the central axis of big free roll, driving roller and freedom in minor affairs roller is all parallel to each other, and the roll surface of a pair big free roll, a pair driving roller and each pair of freedom in minor affairs roller faces mutually；
The cylinder body of big free roll pressure oil cylinder is fixed on upper frame, the mobile terminal of big free roll pressure cylinder piston rod arranges vertically downward and connects with the big free roll being located at bottom upper frame, the cylinder body of cross cylinder is fixed on underframe, the mobile terminal of cross cylinder piston rod be horizontally disposed with and and the wedge slide block fitted mutually with inclined-plane for a pair in one of connect, another block wedge slide block and be located at the big free roll at underframe top and connect；
Drive the cylinder body of oil cylinder under roll-in to be fixed on upper frame, drive the mobile terminal of cylinder piston rod under roll-in to arrange vertically downward and and be located at the driving roller connection bottom upper frame；
Under freedom in minor affairs roll-in, the cylinder body of oil cylinder is fixed on upper frame, and under freedom in minor affairs roll-in, the mobile terminal of cylinder piston rod arranges vertically downward and and is located at each freedom in minor affairs roller connection bottom upper frame；
One end of water pipe connects water tank, the inner chamber of oil cylinder under oil cylinder and freedom in minor affairs roll-in under the through connection respectively of the other end of water pipe big free roll pressure oil cylinder, cross cylinder, driving roll-in。
Fan-shaped section under the described weight for improving the loose shrinkage cavity defect of slab, is characterized in that:
Big free roll and freedom in minor affairs roller all adopt the structure of mandrel type three metamerism roller, roller is driven all to adopt the structure of mandrel type four metamerism roller, it is located at big free roll, freedom in minor affairs roller and drives the edge bearing at roller two ends all to adopt one end to be regulation of mental activities roller bearing, the other end to be three circle bearings, be located at big free roll, freedom in minor affairs roller and drive the intermediate bearing in the middle part of roller all to adopt two three circle bearings；
Big free roll, freedom in minor affairs roller and drive roller and be located at big free roll, freedom in minor affairs roller and drive the bearing block of roller upper bearing (metal) all to adopt internal water flowing cooling, big free roll, freedom in minor affairs roller and drive the inner chamber of roller all to pass through external rotary joint connecting water pipe；After big free roll and freedom in minor affairs roller install, cooling water is injected by water pipe turn on automatically, decreases pipe arrangement on fan-shaped section machine, fan-shaped section simple for structure；Driving one end mounting flange of roller, directly can be connected with the Hooks coupling universal coupling of fan-shaped section driving device by flange, two stream fan-shaped section can be exchanged completely, decreases the spare part amount of fan-shaped section。
Fan-shaped section under the described weight for improving the loose shrinkage cavity defect of slab, is characterized in that: the diameter of big free roll cross section is R, and to drive the diameter of roller and freedom in minor affairs roller cross section be all the value of r, r >=200mm, R is [2r, 2.5r]。
The using method of fan-shaped section under the described weight for improving the loose shrinkage cavity defect of slab, is characterized in that: implement as follows:
Roll gap between a pair big free roll is as the entrance side of fan-shaped section, and outermost a pair freedom in minor affairs roller is as the outlet side of fan-shaped section, and strand enters scalloped end from entrance side；
Adjust the conticaster hauling speed to strand, when making the solidified tail end of liquid core of strand be in the roll gap between a pair big free roll, start big free roll pressure oil cylinder, make the piston rod of big free roll pressure oil cylinder push down on the big free roll being located at bottom upper frame；Start cross cylinder simultaneously, the piston rod making cross cylinder promotes the wedge slide block of horizontal direction, by the active force between wedge slide block inclined-plane, horizontal impulse is changed into the driving force vertically upward being applied to the big free roll being located at underframe top, a pair big free roll is made jointly to extrude strand, by a pair big free roll, the common of strand is extruded, strand applies to be not less than the drafts of 10mm；
After extruding, strand exports from the outlet side of fan-shaped section under the traction of conticaster。
The invention provides fan-shaped section under a kind of brand-new weight, achieve the shrinkage cavity eliminated within strand and loosen, improving the internal soundness of continuous casting billet, it is ensured that the mechanical performance of rolled plate, reduce the purpose of its rolling reduction simultaneously, can be used for producing the rolling steel plate that thickness is higher。
The invention has the beneficial effects as follows: slab quality is high, loose few with shrinkage cavity defect。
Accompanying drawing explanation
Fig. 1 is the front view of the present invention；
Fig. 2 is the K direction view of Fig. 1；
Fig. 3 is the connection diagram of cross cylinder, wedge slide block and big free roll。
Detailed description of the invention
The present invention is further illustrated below by way of specific embodiment。
Embodiment 1
Fan-shaped section under a kind of weight for improving the loose shrinkage cavity defect of slab, including oil cylinder 33 and water pipe 4 under upper frame 11, underframe 12, a pair big free roll 21, a pair driving 22, three pairs of freedom in minor affairs rollers 23 of roller, big free roll pressure oil cylinder 31, cross cylinder 32, driving roll-in, as depicted in figs. 1 and 2, concrete structure is:
Upper frame 11 is located at the surface of underframe 12, two pairs of compression hydraulic cylinder by connecting axle and oscillating bearing respectively hinged to upper frame 11 and underframe 12；Upper frame 11 and underframe 12 all adopt vertical plate type structure, there is high intensity and rigidity, meet the gap preset implemented under weight and regulate requirement, vertical plate type structure permeability is good, thermal deformation resistant ability is strong, be conducive to the installation of di-cold spray nozzle, avoid the accumulation of underframe iron scale and secondary cooling water simultaneously, the phenomenon of roller stall will not be produced；
The bottom of upper frame 11 is sequentially provided with a big free roll 21 rotationally by bearing, one drives roller 22 and at least three freedom in minor affairs rollers 23, the top of underframe 12 is sequentially provided with a big free roll 21 rotationally by bearing, one drives roller 22 and three freedom in minor affairs rollers 23, the bearing block installed surface built-up welding rustless steel of bearing, pipe arrangement and nozzle holder in fan-shaped section are rustless steel, reduce the maintenance of whole fan-shaped section, big free roll 21, the central axis driving roller 22 and freedom in minor affairs roller 23 is all parallel to each other, a pair big free roll 21, the roll surface that a pair drives roller 22 and each pair of freedom in minor affairs roller 23 faces mutually；
The cylinder body of big free roll pressure oil cylinder 31 is fixed on upper frame 11, the mobile terminal of big free roll pressure oil cylinder 31 piston rod arranges vertically downward and connects with being located at the big free roll 21 bottom upper frame 11, the cylinder body of cross cylinder 32 is fixed on underframe 12, as shown in Figure 3, the mobile terminal of cross cylinder 32 piston rod be horizontally disposed with and and the wedge slide block 321 fitted mutually with inclined-plane for a pair in one of connect, another block wedge slide block 321 and be located at the big free roll 21 at underframe 12 top and connect；
Drive the cylinder body of oil cylinder 33 under roll-in to be fixed on upper frame 11, drive the mobile terminal of oil cylinder 33 piston rod under roll-in arrange vertically downward and connect with being located at the driving roller 22 bottom upper frame 11；
Under freedom in minor affairs roll-in, the cylinder body of oil cylinder 34 is fixed on upper frame 11, and under freedom in minor affairs roll-in, the mobile terminal of oil cylinder 34 piston rod arranges vertically downward and connects with being located at each freedom in minor affairs roller 23 bottom upper frame 11；
One end of water pipe 4 connects water tank, the big free roll pressure oil cylinder 31 of the other end of water pipe 4 through connection respectively, cross cylinder 32, drives under roll-in the inner chamber of oil cylinder 34 under 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 adopt the structure of mandrel type three metamerism roller, roller 22 is driven all to adopt the structure of mandrel type four metamerism roller, it is located at big free roll 21, freedom in minor affairs roller 23 and drives the edge bearing at roller 22 two ends all to adopt one end to be regulation of mental activities roller bearing, the other end to be three circle bearings, be located at big free roll 21, freedom in minor affairs roller 23 and drive the intermediate bearing in the middle part of roller 22 all to adopt two three circle bearings；
Big free roll 21, freedom in minor affairs roller 23 and drive roller 22 and be located at big free roll 21, freedom in minor affairs roller 23 and drive the bearing block of roller 22 upper bearing (metal) all to adopt internal water flowing cooling, big free roll 21, freedom in minor affairs roller 23 and drive the inner chamber of roller 22 all to pass through external rotary joint connecting water pipe 4；After big free roll 21 and freedom in minor affairs roller 23 install, cooling water is injected by water pipe 4 turn on automatically, decreases pipe arrangement on fan-shaped section machine, fan-shaped section simple for structure；Driving one end mounting flange of roller 22, directly can be connected with the Hooks coupling universal coupling of fan-shaped section driving device by flange, two stream fan-shaped section can be exchanged completely, decreases the spare part amount of fan-shaped section。
If the diameter of big free roll 21 cross section is R, the diameter driving roller 22 and freedom in minor affairs roller 23 cross section is all r, then the value of r >=200mm, R is [2r, 2.5r], in the present embodiment, and R=500mm, r=230mm。
When the present embodiment uses, implement as follows:
Roll gap between a pair big free roll 21 is as the entrance side of fan-shaped section, and outermost a pair freedom in minor affairs roller 23 is as the outlet side of fan-shaped section, and strand enters scalloped end from entrance side, shown in the hollow arrow in the conveying direction of foundry goods such as Fig. 1；
Adjust the conticaster hauling speed to strand, when the solidified tail end of liquid core making strand is in the roll gap between a pair big free roll 21, start big free roll pressure oil cylinder 31, make the piston rod of big free roll pressure oil cylinder 31 push down on the big free roll 21 being located at bottom upper frame 11；Start cross cylinder 32 simultaneously, the piston rod making cross cylinder 32 promotes the wedge slide block 321 of horizontal direction, by the active force between wedge slide block 321 inclined-plane, horizontal impulse is changed into the driving force vertically upward being applied to the big free roll 21 being located at underframe 12 top, a pair big free roll 21 is made jointly to extrude strand, by a pair big free roll 21, the common of strand is extruded, strand applies to be not less than the drafts of 10mm；
Under weight, fan-shaped section adopts the control mode of long-range roll gap adjustment, and two pairs of compression hydraulic cylinder are arranged in two sides of fan-shaped section band displacement transducer, by servo valve control, it is achieved technological operation under weight；Hydraulic valve platform is provided with pressure transducer, carries out pressure and show；
After extruding, strand exports from the outlet side of fan-shaped section under the traction of conticaster。
Claims (5)
1. one kind for improving fan-shaped section under the weight of the loose shrinkage cavity defect of slab, including upper frame (11) and underframe (12), upper frame (11) is located at the surface of underframe (12), two pairs of compression hydraulic cylinder by connecting axle and oscillating bearing respectively hinged to upper frame (11) and underframe (12), it is characterized in that: also include a pair big free roll (21), drive roller (22) a pair, at least three pairs of freedom in minor affairs rollers (23), big free roll pressure oil cylinder (31), cross cylinder (32), drive oil cylinder (33) and water pipe (4) under roll-in,
The bottom of upper frame (11) is sequentially provided with a big free roll (21) rotationally by bearing, one drives roller (22) and at least three freedom in minor affairs rollers (23), the top of underframe (12) is sequentially provided with a big free roll (21) rotationally by bearing, one drives roller (22) and at least three freedom in minor affairs rollers (23), big free roll (21), the central axis driving roller (22) and freedom in minor affairs roller (23) is all parallel to each other, a pair big free roll (21), the roll surface that a pair drives roller (22) and each pair of freedom in minor affairs roller (23) faces mutually；
The cylinder body of big free roll pressure oil cylinder (31) is fixed on upper frame (11), the mobile terminal of big free roll pressure oil cylinder (31) piston rod arranges vertically downward and connects with the big free roll (21) being located at upper frame (11) bottom, the cylinder body of cross cylinder (32) is fixed on underframe (12), the mobile terminal of cross cylinder (32) piston rod be horizontally disposed with and and the wedge slide block (321) fitted mutually with inclined-plane for a pair in one of connect, another block wedge slide block (321) and be located at underframe (12) top big free roll (21) connect；
Drive the cylinder body of oil cylinder (33) under roll-in to be fixed on upper frame (11), drive the mobile terminal of oil cylinder (33) piston rod under roll-in to arrange vertically downward and and be located at driving roller (22) connection bottom upper frame (11)；
Under freedom in minor affairs roll-in, the cylinder body of oil cylinder (34) is fixed on upper frame (11), and under freedom in minor affairs roll-in, the mobile terminal of oil cylinder (34) piston rod arranges vertically downward and and is located at each freedom in minor affairs roller (23) connection bottom upper frame (11)；
One end of water pipe (4) connects water tank, big free roll pressure oil cylinder (31) of the other end of water pipe (4) through connection respectively, cross cylinder (32), drives under roll-in the inner chamber of oil cylinder (34) under oil cylinder (33) and freedom in minor affairs roll-in。
2. fan-shaped section under the weight for improving the loose shrinkage cavity defect of slab as claimed in claim 1, is characterized in that:
Big free roll (21) and freedom in minor affairs roller (23) all adopt the structure of mandrel type three metamerism roller, roller (22) is driven all to adopt the structure of mandrel type four metamerism roller, it is located at big free roll (21), freedom in minor affairs roller (23) and drives the edge bearing at roller (22) two ends all to adopt one end to be regulation of mental activities roller bearing, the other end to be three circle bearings, be located at big free roll (21), freedom in minor affairs roller (23) and drive the intermediate bearing at roller (22) middle part all to adopt two three to enclose bearings；
Big free roll (21), freedom in minor affairs roller (23) and drive roller (22) and be located at big free roll (21), freedom in minor affairs roller (23) and drive the bearing block of roller (22) upper bearing (metal) all to adopt internal water flowing cooling, the inner chamber of big free roll (21), freedom in minor affairs roller (23) and driving roller (22) all passes through external rotary joint connecting water pipe (4)。
3. fan-shaped section under the weight for improving the loose shrinkage cavity defect of slab as claimed in claim 1 or 2, it is characterized in that: the diameter of big free roll (21) cross section is R, the diameter driving roller (22) and freedom in minor affairs roller (23) cross section is all r, r >=200mm, the value of R is [2r, 2.5r]。
4. the using method of fan-shaped section under the weight for improving the loose shrinkage cavity defect of slab as claimed in claim 1 or 2, is characterized in that: implement as follows:
Roll gap between a pair big free roll (21) is as the entrance side of fan-shaped section, and outermost a pair freedom in minor affairs roller (23) is as the outlet side of fan-shaped section, and strand enters scalloped end from entrance side；
Adjust the conticaster hauling speed to strand, when the solidified tail end of liquid core making strand is in the roll gap between a pair big free roll (21), start big free roll pressure oil cylinder (31), make the piston rod of big free roll pressure oil cylinder (31) push down on the big free roll (21) being located at upper frame (11) bottom；Start cross cylinder (32) simultaneously, the piston rod making cross cylinder (32) promotes the wedge slide block (321) of horizontal direction, by the active force between wedge slide block (321) inclined-plane, horizontal impulse is changed into the driving force vertically upward being applied to the big free roll (21) being located at underframe (12) top, a pair big free roll (21) is made jointly to extrude strand, by a pair big free roll (21), the common of strand is extruded, strand applies to be not less than the drafts of 10mm；
After extruding, strand exports from the outlet side of fan-shaped section under the traction of conticaster。
5. the using method of fan-shaped section under the weight for improving the loose shrinkage cavity defect of slab as claimed in claim 3, is characterized in that: implement as follows:
Roll gap between a pair big free roll (21) is as the entrance side of fan-shaped section, and outermost a pair freedom in minor affairs roller (23) is as the outlet side of fan-shaped section, and strand enters scalloped end from entrance side；
Adjust the conticaster hauling speed to strand, when the solidified tail end of liquid core making strand is in the roll gap between a pair big free roll (21), start big free roll pressure oil cylinder (31), make the piston rod of big free roll pressure oil cylinder (31) push down on the big free roll (21) being located at upper frame (11) bottom；Start cross cylinder (32) simultaneously, the piston rod making cross cylinder (32) promotes the wedge slide block (321) of horizontal direction, by the active force between wedge slide block (321) inclined-plane, horizontal impulse is changed into the driving force vertically upward being applied to the big free roll (21) being located at underframe (12) top, a pair big free roll (21) is made jointly to extrude strand, by a pair big free roll (21), the common of strand is extruded, strand applies to be not less than the drafts of 10mm；
After extruding, strand exports from the outlet side of fan-shaped section under the traction of conticaster。
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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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Cited By (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 |
| CN106623834A (en) * | 2016-12-22 | 2017-05-10 | 中冶京诚工程技术有限公司 | Sector section device for continuous casting slab heavy pressing |
| 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 |
| 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 |
| 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 |
| CN109848383A (en) * | 2017-11-30 | 2019-06-07 | 宝山钢铁股份有限公司 | A kind of flexible reduction method improving Inner Quality of Billet |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN106623834B (en) * | 2016-12-22 | 2019-04-05 | 中冶京诚工程技术有限公司 | Sector section device for continuous casting slab heavy pressing |
| CN109848383A (en) * | 2017-11-30 | 2019-06-07 | 宝山钢铁股份有限公司 | A kind of flexible reduction method improving Inner Quality of Billet |
| 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 |
| 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 |
| 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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