CN201380183Y - Continuous hot rolling device capable of simultaneously satisfying production of steel band coil and flat medium plate - Google Patents
Continuous hot rolling device capable of simultaneously satisfying production of steel band coil and flat medium plate Download PDFInfo
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- CN201380183Y CN201380183Y CN200920084706U CN200920084706U CN201380183Y CN 201380183 Y CN201380183 Y CN 201380183Y CN 200920084706 U CN200920084706 U CN 200920084706U CN 200920084706 U CN200920084706 U CN 200920084706U CN 201380183 Y CN201380183 Y CN 201380183Y
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- continuous rolling
- hot continuous
- straightener
- steel coil
- rolling equipment
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Abstract
The utility model discloses a continuous hot rolling device capable of simultaneously satisfying the production of a steel band coil and a flat medium plate, which comprises a continuous hot rolling mill group. The continuous hot rolling mill group consists of a heating furnace, a two-roll roughing mill group, a four-roll roughing mill group, a finishing mill group, a cooling section and a coiling machine which are connected in sequence through a roller track. An extending roller track is also arranged behind the coiling machine; a slicing mechanism is arranged at the front end of the extending roller track; a cooling bed is arranged on one side of the extending roller track; a moving-out device is arranged between the extending roller track and the cooling bed; a straightening machine is arranged at the tail end of the cooling bed; and a specified length cross shearing mechanism is arranged behind the straightening machine. By adopting the continuous hot rolling device, the conventional thin steel band coil can be produced, the medium plate also can be produced, the maximum thickness of the medium plate can reach 60 mm, and the intensity level is improved to over 1000 MPa. Because the cross production of the steel band coil and the medium plate is achieved on one production line, the availability and the production capacity of the continuous hot rolling device can be effectively improved.
Description
Technical field
The utility model relates to hot continuous rolling production operation equipment, refers to a kind of hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously particularly.
Background technology
Conventional hot continuous rolling produce line mainly is made of heating furnace, roughing unit, mm finishing mill unit, cooling section and coiling machine.During this hot continuous rolling production line work, the coiling process of hot-strip is quite complicated heat, a couple of force fastening deformation process, not only coil of strip internal stress field constantly changes in the strip coiling process, and coil of strip its internal stress in uncoiling process will redistribute again, and certain flatness defect problem just may generate thus therebetween.
Batch stress state characteristics available radial component and tangential component and illustrate, as shown in Figure 1, N is that radial pressure, F are tension force.Shear stress between axial stress and each circle is ignored.The shear stress that moment of torsion is batched in transmission in fact is negligible, because it does not change stress state, and can not cause the respectively slippage between the circle.People pay attention to is stress in roll coil of strip insied width direction with along the distribution situation of roll coil of strip radial direction.
Stress state characteristics in the roll coil of strip are that along the skewness on radius and the width, this is because the convexity difference makes due to the tension force F skewness.Why consider the belt steel thickness section configuration, being based between each astragal steel is not this fact that all contacts on whole width.Because the band steel is the fat shape in coiling process, can think that tension force only is distributed on the contacted strip width, this means that there is a bigger tension force contact position, can replace total tension force.As shown in Figure 2, M1 represents the first lap steel, and Mn represents the last lap steel, and X-axis is represented width, and Y-axis is the coiling tension of steel band, and i represents the standard value line, and k represents the contact zone, and L represents spool axis, and 16 is reel.In coiling process, the contact width between each astragal steel will reduce, and concentration of tension forces is in the strip width centre (convex thickness shape); First lap contacts reel fully, thus even tension be distributed in (standard value) on the width; During in the end a few circle, contact width significantly reduces, and along with the convex value difference, super tension value can reach 4～5 times of standard value.
Fig. 3 illustrated reel withdraw from before radial stress figure on the width, X-axis is represented width among Fig. 3, Y-axis is represented stress intensity, unit is KG/mm
2, M1 represents the first lap steel, Mn represents the last lap steel.Contact width part corresponding compression, in contrast, the stress of noncontact part is zero.Because the tension distribution inequality is in the stress maximum of each astragal steel centre.The radial stress of last astragal steel is zero, because it is a Free Surface.
From the situation of coil of strip internal stress distribution as can be known, the band steel is in coiling process, along with the increase of coil diameter, for certain one deck band steel, its radial pressure increases thereupon, and is especially bigger for the i.e. place's of the taking the lead increase of coil of strip core band steel, causes the probability that bonding takes place interlayer obviously to increase thus; But for unloading the coil volume, its radial pressure successively reduces from inside to outside.But it is different again for the circumference stress rule, its minimum of a value often occurs in inner certain layer of coil of strip, and the circumference stress of band steel toe portion then increases along with its pressure and reduces to some extent, and some layer in the middle of the coil of strip reduces maximumly, if initial coiling tension is bigger, also negative value may appear.
For softer and thin band steel, when strip tension does not have banding less than initial set-point, cause the radial stress of coil of strip inside too small, thereby cause generation slippage between each layer easily and cause the volume that collapses; Although hightension can be used for avoiding collapsing the volume defective, for band steel toe portion, coiling tension is excessive, and the circumferential compressive force that causes several leading circle to be subjected to is excessive, when coil of strip is subjected to bump and waits interference between lifting or resting period, tends to produce heart-shaped defective; Hard core at present employing taper control batches technology, and after unloading volume and withdrawing from reel, invar volume internal layer shrinks inwards, and when tension force tapering curve descending slope is excessive, loose core because of tensile stress too greatly often very likely causes in volume core place.
Coil of strip is being opened at ordinary times, is subjected to the effect of uncoiling external force and plastic deformation occurs, perpendicular to the coil of strip of rolling direction transversely, can fold the plastic deformation vestige of the similar chop of a rule, just cross breaks defect.Cross breaks defect has tangible strip folding line, illustrates that this place exists local deformation excessive.The distortion of plate face is caused by residual stress, but do not find cross breaks defect in hot rolling reeling fashion, residual stress distribution when hot rolling reeling is described is not the reason that produces cross breaks defect, but some operation of opening in the flat process at coil of strip makes the stress in the steel plate that variation take place, and has formed that a kind of stress distribution that produces cross breaks defect and has caused cross breaks defect.This stress distribution can produce in the BENDING PROCESS of steel plate, and is a pressurized one side tension, and the uncoiling of coil of strip just in time is this distortion.Therefore can think that cross breaks defect is not intrinsic in the coil of strip, but add up by the outer bend moment in uncoiling and the aligning process.
The plastic bending of steel plate is not only relevant with thickness, and relevant with the yield strength of steel plate.The elasto bending distortion can take place in the coil of strip less for coil diameter, that intensity is lower in holding flat process, be easy to generate cross break; And, intensity higher coil of strip big for coil diameter opened at ordinary times based on strain. be difficult for producing cross break.But along with reducing of coil diameter, especially opening flat latter stage, cross breaks defect may occur or increase the weight of.Confirmed this point in the actual phenomenon of opening in the flat process when finding cross break.
The most serious wave is the circular arc of coil of strip self in the coil of strip, and open at ordinary times that it belongs to just curved, the bad wave that produces of milling train control, wooden dipper song, its radius of curvature is more much bigger than coil of strip self arc radius, so the uncoiler zone is the Yi Fachu of cross breaks defect.According to investigations, cross breaks defect occurs in this place more than 80%.
To form various uneven residual stress after the hot-strip rolling.Known that deformation reason is because thermal stress, transformation stress and the phase change expansion stress in machining stress, when cooling, and batched and follow-uply open the stress that flat process produces.Batch and open the flat stress influence degree maximum that produces, reason is wherein set forth in above content.Steel plate thickness is big more, and it is big more to the influence of production board to batch and open flat process, in the time of will being with the coil of strip crosscut to become plate, can occur multi-form and shape wave, warpage degree.
Batch and open the flat rolled steel plate shape deterioration that makes, simultaneously because the ability of coiling machine has to a certain degree limited the specification (particularly thickness) of hot continuous rolling product and the intensity rank of finished product.Existing coiling machine allow the band steel maximum ga(u)ge that batches to surpass 25mm, and band hardness of steel level limit is below 800MPa.
This shows that on the hot continuous rolling produce line of routine, till the coiling machine, institute can produce at present generally is that thickness is no more than the steel band that 25mm, intensity rank are no more than 800MPa by heating furnace, and steel band must pass through coiling machine and batch just and can roll off the production line.This hot continuous rolling produce line still can't be produced the flat cut deal of opening that thickness surpasses 25mm.Owing to do not realize a line multipotency, so its production efficiency is not high.
Summary of the invention
The purpose of this utility model is exactly that a kind of hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously will be provided.Adopt this equipment both can produce conventional thin strip steel coil, can produce cut deal again, and can eliminate or reduce the internal residual stress of steel coil strip and cut deal, make the maximum ga(u)ge of cut deal reach 60mm, intensity rank is brought up to more than the 1000MPa.
For achieving the above object, the hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously that the utility model is designed comprises the hot continuous rolling unit that is connected to form successively by roller-way by heating furnace, two roller roughing units, four-high rougher group, mm finishing mill unit, cooling section and coiling machine.The back of described coiling machine also is provided with extension roller table, the front end of described extension roller table is provided with cutting mechanism, one side of described extension roller table is provided with cold bed, be provided with moving-out device between described extension roller table and the cold bed, the tail end of described cold bed is provided with straightener, and the back of described straightener is provided with scale cross cut shears structure.
Advantage of the present utility model is: designed hot continuous rolling equipment is by the organic assembling of conventional hot rolling production line, extension roller table, cold bed, warm formula straightener and cutting mechanism etc., eliminated the restriction of coiling machine, make it can realize the production of conventional hot continuous rolling machine steel coil strip, can directly produce the flat cut deal of opening that avoids batching again, and can effectively reduce the residual stress and the flatness defect of cut deal, increase ga(u)ge of plate and intensity, really embody the technical characterstic of a line multipotency.Simultaneously, build the investment of opening flat production line specially, can significantly improve the efficient of hot continuous rolling production line, have important application value owing to saved.Practice shows, the utility model can realize on hot-rolling line that thickness reaches the Heavy Plate Production of 60mm, the intensity rank of steel plate also can be brought up to more than the 1000MPa, is discharging the production capacity that improves hot continuous rolling production cut deal when professional heavy and medium plate mill is produced thin plate, narrow boards production capacity.
Description of drawings
Fig. 1 is band steel tension force and pressure distribution view when take-up;
Fig. 2 is band steel tension distribution view when take-up;
Fig. 3 is the radial stress distribution schematic diagram of band steel at width;
Fig. 4 is the structural representation that can satisfy the hot continuous rolling equipment of steel coil strip and Kai Ping Heavy Plate Production simultaneously of the present utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments hot continuous rolling equipment of the present utility model is described in further detail:
Tension force, pressure and the stress distribution of band steel are closed to tie up to and have been made labor in the background technology in Fig. 1～3, repeat no more in this.
The hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously shown in Figure 4 comprises the hot continuous rolling unit that is connected to form successively by roller-way by heating furnace 1, two roller roughing units 3, four-high rougher group 4, mm finishing mill unit 5, cooling section 6 and coiling machine 7.Be furnished with one section extension roller table 11 in the back of coiling machine 7, the length of extension roller table 11 is 90～150 meters, to satisfy the needs of opening flat Heavy Plate Production.Front end at extension roller table 11 is furnished with cutting mechanism 8, and cutting mechanism 8 adopts cutting flying shear or cutting circle shear, can excise the abnormity part of steel plate head, afterbody, or steel plate is carried out cutting.Side at extension roller table 11 is furnished with cold bed 12, the treating capacity reasonable disposition of visual on-the-spot region area of the length of cold bed 12 and width and steel plate.Between extension roller table 11 and cold bed 12, be provided with moving-out device 9, steel plate can be moved to cold bed 12 by extension roller table 11 by moving-out device 9.After steel plate moved to cold bed 12, extension roller table 11 can be admitted follow-up steel plate.Moving-out device 9 preferably shifts out step rate or magnetic force hangs, and can avoid producing in shifting out process scratching or scratch.
Tail end at cold bed 12 is furnished with straightener 13, and straightener 13 adopts the warm formula straightener of 5～17 roller quadruple formulas aligning, can carry out the brute force aligning to steel plate, further eliminates the various inhomogeneous residual stress that forms in the process, significantly improves steel-plate shape.Because at this moment the steel plate body temperature can be more than 250 ℃, the effect of temperature correction can be far superior to routine and hold cold strong effect on the flat production line.Be provided with scale cross cut shears structure 14 in the back of straightener 13, can carry out the crosscut cutting the steel plate after the temperature correction.Behind scale cross cut shears structure 14, be provided with and stamp pallet 15.
The course of work of the present utility model is such: slab 2 enters two roller roughing units 3, four-high rougher group 4, mm finishing mill unit 5 successively by roller-way and is rolled, slab 2 after rolling enters cooling section 6 coolings, directly pass coiling machine 7 after the cooling, enter cutting mechanism 8 and carry out cutting, form finished product steel plate 10.After finished product steel plate 10 enters extension roller table 11, move to cold bed 12 by moving-out device 9, cooled finished product steel plate 10 enters straightener 13 and carries out the brute force aligning, and the finished product steel plate 10 behind the powerful aligning enters scale cross cut shears structure 14, carry out the crosscut cutting, enter at last and stamp pallet 15 heaps and stamp.
When finished product steel plate 10 runs to extension roller table 11 and carries out subsequent treatment, but production steel coil strip on the production line, and steel coil strip rolls off the production line after batching through coiling machine 7.When extension roller table 11 is vacated, continue the production of steel plate, can farthest improve the production efficiency of production line like this, realize the production that intersects of steel coil strip and steel plate.
The utility model can to thickness the steel plate of 20～60mm carry out hot continuous rolling, extension roller table transportation, crop end or cut, the processing of operations such as cold bed cooling, temperature correction are straight, scale is horizontally cut, stacking, be the hot continuous rolling steel coil strip and the Kai Ping medium plate production line of a combination function, can be when guaranteeing that at utmost cut deal is straight, eliminate or reduce its inner residual stress.
Claims (9)
1. hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously, comprise by heating furnace (1), two roller roughing units (3), four-high rougher group (4), mm finishing mill unit (5), the hot continuous rolling unit that cooling section (6) and coiling machine (7) are connected to form successively by roller-way, it is characterized in that: the back of described coiling machine (7) is provided with extension roller table (11), the front end of described extension roller table (11) is provided with cutting mechanism (8), one side of described extension roller table (11) is provided with cold bed (12), be provided with moving-out device (9) between described extension roller table (11) and the cold bed (12), the tail end of described cold bed (12) is provided with straightener (13), and the back of described straightener (13) is provided with scale cross cut shears structure (14).
2. the hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously according to claim 1 is characterized in that: the length of said extension roller table (11) is 90～150 meters.
3. the hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously according to claim 1 and 2 is characterized in that: said cutting mechanism (8) is cutting flying shear or cutting circle shear.
4. the hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously according to claim 1 and 2 is characterized in that: said moving-out device (9) is for shifting out step rate or magnetic force hangs.
5. the hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously according to claim 3 is characterized in that: said moving-out device (9) is for shifting out step rate or magnetic force hangs.
6. the hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously according to claim 1 and 2 is characterized in that: said straightener (13) is warm formula straightener.
7. the hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously according to claim 3 is characterized in that: said straightener (13) is warm formula straightener.
8. the hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously according to claim 4 is characterized in that: said straightener (13) is warm formula straightener.
9. the hot continuous rolling equipment that can satisfy steel coil strip and Kai Ping Heavy Plate Production simultaneously according to claim 5 is characterized in that: said straightener (13) is warm formula straightener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920084706U CN201380183Y (en) | 2009-04-01 | 2009-04-01 | Continuous hot rolling device capable of simultaneously satisfying production of steel band coil and flat medium plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920084706U CN201380183Y (en) | 2009-04-01 | 2009-04-01 | Continuous hot rolling device capable of simultaneously satisfying production of steel band coil and flat medium plate |
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| Publication Number | Publication Date |
|---|---|
| CN201380183Y true CN201380183Y (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920084706U Expired - Lifetime CN201380183Y (en) | 2009-04-01 | 2009-04-01 | Continuous hot rolling device capable of simultaneously satisfying production of steel band coil and flat medium plate |
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| Country | Link |
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| CN (1) | CN201380183Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101491812B (en) * | 2009-03-06 | 2011-09-07 | 武汉钢铁(集团)公司 | Hot continuous rolling medium-and-heavy plate production method and device without coiling micro-stress |
| CN104289517A (en) * | 2014-09-23 | 2015-01-21 | 南京钢铁股份有限公司 | Production method for off-line subdividing plate s |
| CN106345807A (en) * | 2016-11-02 | 2017-01-25 | 北京京诚之星科技开发有限公司 | Middle thick plate production line and production method |
| CN109332385A (en) * | 2018-09-25 | 2019-02-15 | 太原科技大学 | A kind of plates line for small lot multi items |
-
2009
- 2009-04-01 CN CN200920084706U patent/CN201380183Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101491812B (en) * | 2009-03-06 | 2011-09-07 | 武汉钢铁(集团)公司 | Hot continuous rolling medium-and-heavy plate production method and device without coiling micro-stress |
| CN104289517A (en) * | 2014-09-23 | 2015-01-21 | 南京钢铁股份有限公司 | Production method for off-line subdividing plate s |
| CN106345807A (en) * | 2016-11-02 | 2017-01-25 | 北京京诚之星科技开发有限公司 | Middle thick plate production line and production method |
| CN109332385A (en) * | 2018-09-25 | 2019-02-15 | 太原科技大学 | A kind of plates line for small lot multi items |
| CN109332385B (en) * | 2018-09-25 | 2020-05-22 | 太原科技大学 | Metal plate rolling line for small-batch multiple varieties |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100113 Effective date of abandoning: 20090401 |