CN102430578A - Cold-rolled strip steel flattening device and cold-rolled strip steel cross break eliminating method - Google Patents
Cold-rolled strip steel flattening device and cold-rolled strip steel cross break eliminating method Download PDFInfo
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- CN102430578A CN102430578A CN201110245793XA CN201110245793A CN102430578A CN 102430578 A CN102430578 A CN 102430578A CN 201110245793X A CN201110245793X A CN 201110245793XA CN 201110245793 A CN201110245793 A CN 201110245793A CN 102430578 A CN102430578 A CN 102430578A
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Abstract
The invention relates to a cold-rolled strip steel flattening device and a cold-rolled strip steel cross break eliminating method. The front and back of a flattening machine are respectively provided with an uncoiling tension roller; an uncoiling turning roller is also arranged in front of the tension roller at the front of the flattening machine along the strip advancing direction; the middle sections of the bodies of the two uncoiling tension rollers and the uncoiling turning roller are in a cylindrical structure, and the two ends are in a symmetric slant cone-surface structure; and the gradient of the slant cone-surface structure is (1:100)-(1:30). As symmetric slant cone-surface structures are ground at the two ends of the bodies of the two uncoiling tension rollers at the front and back of the flattening machine and the uncoiling turning roller in front of the tension rollers, the non-uniform distribution of tangential force and normal force in the direction of the roller surface can be eliminated to a great degree, the tangential force and normal force in each direction of the roller surface are uniformly distributed in the area of the gradient of the slant cone-surface structure after the grinding, and the defect in quality of cross break can be eliminated to a great degree with the elimination rate of about 92%.
Description
Technical field
The present invention relates to a kind of cold-strip steel flattening device and cold-strip steel cross break seal removing method.
Background technology
Existing cold-rolled steel sheet production process mainly is: raw material hot rolled coil → pickling → cold rolling-slitting-cleaning-annealing-finishing → finished product, finishing procedure are determining the quality of finished product coil of strip quality as last procedure.Cross break seal defective be cold-strip steel in the common a kind of mass defect of smooth straightening operation, generally during less than the band steel of 0.6mm, be prone to produce cross break seal defective at smooth thickness.This defective generally occurs in band steel both sides, and the middle part is less.The form of expression of cross break seal defective has 2 kinds: first kind is to be 90 ° travers approximately with rolling direction, and second kind is nail shape arc striped, and its spacing is between 20～100mm, and length is between 20～200mm.
Causing the main cause of cross break seal defective is technological reason; Be embodied in the following aspects: (1) plate shape is bad: during cold rolling of strip steel; If the control of plate shape is not good; It is tall and big in the limit of 10mm wave and middle wave to produce wave when rolling, causes band steel interlaminar bonding after the cover annealing easily, and belt steel surface can produce the cross break seal when smooth; (2) annealing temperature is improper: when the band steel is annealed in bell furnace, if temperature is too high.It is bonding to produce interlayer; If the band steel heats up when annealing, the cooling rate mistake, can cause the excessive velocities of expanding with heat and contract with cold of coil of strip; If the surface wear of convection current plate also can cause the coil of strip interlaminar bonding, the band steel of interlaminar bonding appears, be prone to produce the cross break seal when smooth; (3) smooth preceding steel roll temperature is higher: if steel roll temperature is greater than 45 ℃ before smooth, the band steel can produce a large amount of cross breaks seals.Main cause is that metallic molecule was more active when temperature was high. the band steel is easy to jump to the plastically deforming area from the elastic deformation area when receiving pulling force, produces skid wire at belt steel surface; Cause producing the cross break seal; But when temperature is higher than 35 ℃, air humidity when big, the heat radiation on secondary cooling table of the coil of strip after the annealing is slow, though cooling velocity is low. the belt steel surface temperature is lower than 45 ℃; But long-range 45 ℃ of coil of strip internal temperature, belt steel surface also can produce the cross break seal.It is the result of the reason comprehensive function aspect above three that the cross break seal appears after smooth in cold-rolled thin steel strip, adopts from the method for technology controlling and process and has high input weak effect.
In a single day the cross break seal appears in belt steel surface, not only influences strip surface quality, and the mechanical property of influence band steel, is prone to during punching press break.The coil of strip that the cross break seal occurs generally can be handled by degradation, and according to the difference of serious situation, production unit cost per ton reduces 50-100 unit not to be waited, and economic benefit is had a strong impact on.
Summary of the invention
The purpose of this invention is to provide a kind of cold-strip steel flattening device, produce cross break seal defective occurrence rate problem of higher, a kind of cold-strip steel cross break seal removing method is provided simultaneously to solve existing apparatus.
For realizing above-mentioned purpose; The technical scheme of cold-strip steel flattening device provided by the invention is following: a kind of cold-strip steel flattening device; Comprise planisher; Be respectively equipped with a uncoiling tension roller before the machine of planisher with behind the machine, before the jockey pulley before machine on the band direction of advance, also be provided with uncoiling slewing rollers, said two uncoiling tension rollers and uncoiling slewing rollers body of roll interlude are cylindrical structure; Its two ends are the scalene cone structure of symmetry, and the gradient scope of said scalene cone structure is 1:100～1:30.
The junction of said scalene cone structure and cylindrical structure is the arc transition structure.
The length of said scalene cone is between 30～300mm.
The technical scheme of cold-strip steel cross break seal removing method provided by the invention is following: a kind of cold-strip steel cross break seal removing method; Be respectively equipped with a uncoiling tension roller before the machine of the planisher that this method is used with behind the machine; Before the jockey pulley before machine on the band direction of advance, also be provided with uncoiling slewing rollers; Said two uncoiling tension rollers and uncoiling slewing rollers body of roll interlude are cylindrical structure; Its two ends are the scalene cone structure of symmetry, make tangential force and the normal force of each roll surface direction be evenly distributed in grinding and retread in the zone of cone structure tapering; The gradient scope of said scalene cone structure is 1:100～1:30.
The junction of said scalene cone structure and cylindrical structure is the arc transition structure.
The length of said scalene cone is between 30～300mm.
Cold-strip steel flattening device of the present invention and cold-strip steel cross break seal removing method with the planisher machine before with machine after two uncoiling tension rollers and jockey pulley before the uncoiling slewing rollers body of roll two ends that are provided with all grind out the scalene cone structure of symmetry; Can be from eliminating roll surface direction tangential force and normal force situation pockety to a great extent; Making tangential force and the normal force of each roll surface direction be evenly distributed in grinding retreads in the zone of cone structure tapering; Can eliminate the mass defect of cross break seal to a great extent, elimination factor is up to about 92%.
Description of drawings
Fig. 1 is the structural representation of cold-strip steel flattening device embodiment of the present invention;
Fig. 2 is the structure chart of roller of the present invention;
Fig. 3 is the partial enlarged drawing of Fig. 2;
Fig. 4 is the force diagram of roll surface.
The specific embodiment
The cross break seal defective that smooth unit shows does not come out later in annealing operation completely, is appearing at the unwinding machine after the planisher uncoiling between the frame, and the cross break seal can alleviate through symptom after the skin pass rolling to some extent, but can not eliminate fully.Therefore analyzing defect mainly occurs between this, mainly contains uncoiling slewing rollers, two control points of jockey pulley.
The structure of a kind of cold-strip steel flattening device embodiment is as shown in Figure 1; Be respectively equipped with a uncoiling tension roller 2 and 3 before the machine of this device planisher 1 with behind the machine, before the jockey pulley before machine on the band direction of advance 3, also be provided with uncoiling slewing rollers 4, as shown in Figure 2; Two uncoiling tension rollers and the uncoiling slewing rollers body of roll 5 interludes are cylindrical structure 52; Its two ends are provided with the scalene cone structure 52 of symmetry respectively, and the centre of roller is installed with axle 6, and two ends are provided with end plate 7.The gradient scope of scalene cone structure is 1:100～1:30, the gradient of the preferred 1:50 of present embodiment, and the length of gradient scalene cone is between 30～300mm.
As shown in Figure 3, scalene cone structure 51 is the arc transition structure with the oblique junction 53 of mill of cylindrical structure 52.
As shown in Figure 4,, the flattening process overall process can know that the main cause that the cross break seal appears in cold-strip steel in the finishing operation of rolling causes along roll surface direction tangential force and normal force skewness through being carried out force analysis.
Cold-strip steel cross break seal removing method of the present invention; Employing with the planisher machine before with machine after two uncoiling tension rollers and jockey pulley before the uncoiling slewing rollers body of roll two ends that are provided with all grind out the mode of the scalene cone structure of symmetry; Can be from eliminating roll surface direction tangential force and normal force situation pockety to a great extent, make tangential force and the normal force of each roll surface direction be evenly distributed in grinding and retread in the zone of cone structure tapering; The gradient scope of scalene cone structure is the gradient of 1:100～preferred 1:50 of 1:30 present embodiment, and the length of gradient scalene cone is between 30～300mm.
As shown in Figure 3, scalene cone structure 51 is the arc transition structure with the oblique junction 53 of mill of cylindrical structure 52.
Through lot of test, be employed in the method that the jockey pulley grinding behind the machine before uncoiling slewing rollers and the machine goes out certain chamfering (being the scalene cone structure) and can eliminate the mass defect that cross break is printed to a great extent, elimination factor is up to about 92%.
Claims (6)
1. cold-strip steel flattening device; Comprise planisher; Be respectively equipped with a uncoiling tension roller before the machine of planisher with behind the machine, before the jockey pulley before machine on the band direction of advance, also be provided with uncoiling slewing rollers, it is characterized in that: said two uncoiling tension rollers and uncoiling slewing rollers body of roll interlude are cylindrical structure; Its two ends are the scalene cone structure of symmetry, and the gradient scope of said scalene cone structure is 1:100～1:30.
2. cold-strip steel flattening device according to claim 1 is characterized in that: the junction of said scalene cone structure and cylindrical structure is the arc transition structure.
3. cold-strip steel flattening device according to claim 1 and 2 is characterized in that: the length of said scalene cone is between 30～300mm.
4. removing method is printed in a cold-strip steel cross break; Be respectively equipped with a uncoiling tension roller before the machine of the planisher that this method is used with behind the machine; Before the jockey pulley before machine on the band direction of advance, also be provided with uncoiling slewing rollers; It is characterized in that: said two uncoiling tension rollers and uncoiling slewing rollers body of roll interlude are cylindrical structure, and its two ends are the scalene cone structure of symmetry, make tangential force and the normal force of each roll surface direction be evenly distributed in grinding and retread in the zone of cone structure tapering; The gradient scope of said scalene cone structure is 1:100～1:30.
5. cold-strip steel cross break seal removing method according to claim 4, it is characterized in that: the junction of said scalene cone structure and cylindrical structure is the arc transition structure.
6. according to claim 4 or 5 described cold-strip steel cross break seal removing methods, it is characterized in that: the length of said scalene cone is between 30～300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110245793XA CN102430578A (en) | 2011-08-25 | 2011-08-25 | Cold-rolled strip steel flattening device and cold-rolled strip steel cross break eliminating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110245793XA CN102430578A (en) | 2011-08-25 | 2011-08-25 | Cold-rolled strip steel flattening device and cold-rolled strip steel cross break eliminating method |
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| CN102430578A true CN102430578A (en) | 2012-05-02 |
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| CN201110245793XA Pending CN102430578A (en) | 2011-08-25 | 2011-08-25 | Cold-rolled strip steel flattening device and cold-rolled strip steel cross break eliminating method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104923574A (en) * | 2015-07-02 | 2015-09-23 | 首钢总公司 | Flattening control method for strip steel |
| CN107321790A (en) * | 2017-07-31 | 2017-11-07 | 日照宝华新材料有限公司 | The acid washing method of low-carbon hot-rolling strip |
| CN108160715A (en) * | 2017-12-26 | 2018-06-15 | 包头钢铁（集团）有限责任公司 | A kind of control method of low-carbon hot-rolled steel uncoiling cross break print |
| CN108273870A (en) * | 2018-03-19 | 2018-07-13 | 无锡市锡东橡塑机械有限公司 | A kind of belt steel flating machine |
| CN108311540A (en) * | 2018-02-26 | 2018-07-24 | 包头钢铁（集团）有限责任公司 | Steel production method, steel production system and computer readable storage medium |
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| CN2074218U (en) * | 1990-07-03 | 1991-04-03 | 常熟市新型钢材研究所 | Roll-adjusting device |
| CN1840256A (en) * | 2005-03-28 | 2006-10-04 | 宝山钢铁股份有限公司 | Flattening process for steel strip |
| CN101134277A (en) * | 2007-09-26 | 2008-03-05 | 中冶陕压重工设备有限公司 | Manufacturing method of surface-quenching chromium-plating winded-welding roller |
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| CN201693002U (en) * | 2010-06-07 | 2011-01-05 | 中冶恒通冷轧技术有限公司 | Turning roll of loop of acid-tandem-rolling horizontal type looping car |
| CN202263798U (en) * | 2011-08-25 | 2012-06-06 | 郑州市华驰薄板科技有限公司 | Planishing device for cold-rolled strip steel |
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| CN2074218U (en) * | 1990-07-03 | 1991-04-03 | 常熟市新型钢材研究所 | Roll-adjusting device |
| CN1840256A (en) * | 2005-03-28 | 2006-10-04 | 宝山钢铁股份有限公司 | Flattening process for steel strip |
| CN101134277A (en) * | 2007-09-26 | 2008-03-05 | 中冶陕压重工设备有限公司 | Manufacturing method of surface-quenching chromium-plating winded-welding roller |
| CN201124203Y (en) * | 2007-11-23 | 2008-10-01 | 上海力达重工制造有限公司 | Straightening roll for double-roller flattening machine |
| CN201300139Y (en) * | 2008-12-05 | 2009-09-02 | 西安曼海特工业技术有限公司 | High precision stretch bending straightening unit |
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| CN201693002U (en) * | 2010-06-07 | 2011-01-05 | 中冶恒通冷轧技术有限公司 | Turning roll of loop of acid-tandem-rolling horizontal type looping car |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104923574A (en) * | 2015-07-02 | 2015-09-23 | 首钢总公司 | Flattening control method for strip steel |
| CN107321790A (en) * | 2017-07-31 | 2017-11-07 | 日照宝华新材料有限公司 | The acid washing method of low-carbon hot-rolling strip |
| CN108160715A (en) * | 2017-12-26 | 2018-06-15 | 包头钢铁（集团）有限责任公司 | A kind of control method of low-carbon hot-rolled steel uncoiling cross break print |
| CN108160715B (en) * | 2017-12-26 | 2019-06-04 | 包头钢铁（集团）有限责任公司 | A kind of control method of low-carbon hot-rolled steel uncoiling cross break print |
| CN108311540A (en) * | 2018-02-26 | 2018-07-24 | 包头钢铁（集团）有限责任公司 | Steel production method, steel production system and computer readable storage medium |
| CN108273870A (en) * | 2018-03-19 | 2018-07-13 | 无锡市锡东橡塑机械有限公司 | A kind of belt steel flating machine |
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Application publication date: 20120502 |