CN114682646B - Control method for advanced high-strength steel leveling coiling inner diameter looseness - Google Patents
Control method for advanced high-strength steel leveling coiling inner diameter looseness Download PDFInfo
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- CN114682646B CN114682646B CN202210329188.9A CN202210329188A CN114682646B CN 114682646 B CN114682646 B CN 114682646B CN 202210329188 A CN202210329188 A CN 202210329188A CN 114682646 B CN114682646 B CN 114682646B
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- coiling
- wrapper
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- inner diameter
- tension
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 7
- 230000002950 deficient Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/02—Winding-up or coiling
- B21C47/04—Winding-up or coiling on or in reels or drums, without using a moving guide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
The invention relates to an advanced control method for the internal diameter looseness of high-strength steel leveling coiling, wherein the angle from the strip steel to the bitten point from an arm-embracing roller is less than 40 degrees; the distance between the lower arm-embracing roller and the winding drum is 3-5 mm; the front end of the lower arm-embracing roller is connected with an arc-shaped guide plate; when the wrapper is used for coiling the steel plate, the tension force of the belt is in direct proportion to the thickness of the strip steel; when the belt head is threaded, the height of the variable-height crease-resisting roller at the outlet of the temper mill is kept at the highest position, the highest position is always kept in the time from the threading start to the opening of the wrapper, and the position is kept for 12-20 seconds after the wrapper is opened; controlling the time from the starting of speed increase after tape threading to the time when the tension value reaches the peak tension within 5 s; the speed of the radial expansion and in-place of the reel sector does not exceed 3s; the advantages are that: on the premise of not increasing equipment investment, the phenomenon of flattening inner diameter unwinding is reduced, the defective rate of unwinding is reduced, and the defective rate of other secondary defects such as scratches caused by unqualified unwinding is reduced.
Description
Technical Field
The invention relates to an advanced control method for loosening of the inner diameter of high-strength steel in leveling and coiling.
Background
At present, when various large iron and steel enterprises produce advanced cold-rolled high-strength steel, a temper mill is generally required to temper the annealed product so as to obtain good plate shape, good performance and good surface microstructure. A turning roll mode and an S roll mode are generally adopted in a finished product coiling mode of a leveling unit, the structural requirement on a wrapper is relatively complex, when the turning roll mode is produced, a method that a lower holding arm is held upwards and a front guide plate is lifted is adopted to guide a steel plate to enter the wrapper, but after the lower holding arm of the wrapper is lifted, the yield strength of high-strength steel is higher and is above 590MPa, the deformation resistance is high during coiling, a strip head vertically collides with the steel plate before the steel plate enters the wrapper, the inner diameter of the steel coil is loosened, the belt wrapper fails during wrapper, the inner diameter of the steel coil is easy to fold due to the loosening of the inner diameter, the strip steel is scratched during leveling due to the loosening of the inner diameter during high-speed production of the unit, and after the loosening of the inner diameter of the steel coil, the coil is forced to be separated, and the unqualified product quantity is increased.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a control method for the smooth coiling inner diameter looseness of advanced high-strength steel, and the control method is used for optimizing control schemes and the like for a coiling strip head to enter a coiling machine on the premise of not increasing equipment investment, reducing direct and indirect unqualified products caused by the coiling inner diameter looseness, and realizing the purpose that the cold rolling of the advanced high-strength steel, the plate shape and the surface quality meet the requirements.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a control method for the loosening of the inner diameter of advanced high-strength steel in leveling and coiling comprises the following steps:
1) The angle from the arm-holding roller to the bitten point of the strip steel is less than 40 degrees, namely the included angle between the connecting line of the tangent point of the lower arm-holding roller and the coiling machine and the center of the coiling machine and the connecting line of the tangent point between the belt of the coil aid and the coiling machine and the center of the coiling machine is less than 40 degrees;
2) The distance between the lower arm-embracing roller and the winding drum is 3-5 mm;
3) The front end of the lower arm-embracing roller is connected with an arc-shaped guide plate, and the arc-shaped guide plate and the surface of the winding drum form an involute shape, so that the head of the steel plate can be smoothly guided in;
4) When the wrapper is used for coiling the steel plate, the tension force of the belt is in direct proportion to the thickness of the strip steel, and the tension pressure of the belt is = (35 + the thickness (mm) of the steel plate) by 3 bar;
5) When the belt head is threaded, the height of the variable-height crease-resisting roller at the outlet of the temper mill is kept at the highest position, the highest position is always kept in the time from the threading start to the opening of the wrapper, and the position is kept for 12-20 seconds after the wrapper is opened; ensuring that the angle of the steel plate entering the wrapper is less than 40 degrees;
6) Controlling the time from the start of speed increase after threading to the time when the tension value reaches the peak tension within 5 s;
7) The speed of the radial expansion and in-place of the reel sector does not exceed 3s, and the diameters of the coil aid and the reel are ensured to be maximum after the strip steel enters the coil aid.
The arc-shaped guide plate is made of 42CrMO.
The peak tension is 1.2-1.5 times of the normal crimp tension.
The belt tensioning pressure is controlled to be 35-45bar.
Compared with the prior art, the invention has the beneficial effects that:
on the premise of not increasing equipment investment, the occurrence of the phenomenon of flat inner diameter uncoiling is reduced, the unqualified product rate of other secondary defects such as scratches caused by unqualified uncoiling is reduced, and the cold rolling advanced high-strength steel, the shape and the surface quality meet the requirements.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1-lower arm-embracing roller 2-coiling machine 3-steel plate 4-wrapper guide plate 5-arc guide plate.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.
Referring to fig. 1, a control method for loosening of an inner diameter of an advanced high-strength steel in leveling coiling comprises the following steps:
1) The angle from the steel plate to the bitten point from the arm-holding roller is less than 40 degrees, namely the included angle between the connecting line of the tangent point of the lower arm-holding roller and the coiling machine and the center of the coiling machine and the connecting line of the tangent point between the wrapper belt and the coiling machine and the center of the coiling machine is less than 40 degrees; fig. 1 shows 38.
2) The distance between the lower arm-embracing roller and the winding drum is D = 3-5 mm, and the distance is used for keeping the thickness of the steel plate;
3) The front end of the lower arm-embracing roller is connected with an arc-shaped guide plate, and the arc-shaped guide plate and the surface of the winding drum form an involute shape, so that the head of the steel plate can be smoothly guided in; the arc guide plate is made of 42CrMO;
4) When the wrapper is used for coiling the steel plate, the tension force of the belt is in direct proportion to the thickness of the steel plate, and the tension pressure of the belt is = (35 + the thickness (mm) of the steel plate) 3) bar; the belt tensioning pressure is controlled to be 35-45bar;
5) When the belt head is threaded, the height of the variable-height crease-resisting roller at the outlet of the temper mill is kept at the highest position, the highest position is always kept in the time from the threading start to the opening of the wrapper, and the position is kept for 15 seconds after the wrapper is opened; ensuring that the angle of the steel plate entering the wrapper is less than 40 degrees;
6) Controlling the time from the start of speed increase after threading to the time when the tension value reaches the peak tension within 5 s; the peak tension is 1.2-1.5 times of the normal curling tension, and the internal diameter tightening capacity is improved.
7) The speed of the radial expansion in place of the reel sector does not exceed 3s, and the largest diameters of the coil aid and the reel are ensured after the steel plate enters the coil aid.
Examples
The specific technological parameters of the advanced control method for the loosening of the inner diameter of the high-strength steel in the leveling and coiling process are shown in the table 1.
TABLE 1
| Examples | 1 | 2 | 3 | 4 | 5 |
| Thickness of steel plate, mm | 1.2 | 1.4 | 1.5 | 1.6 | 0.8 |
| The strength grade of the steel plate is high,MPa | 590 | 780 | 980 | 980 | 1180 |
| time of reel diameter expansion in place, s | 2.2 | 2.1 | 2.2 | 2.0 | 2.2 |
| Time to peak coiling tension, s | 4.6 | 4.2 | 4.0 | 4.2 | 4.0 |
| The defective rate of the inside diameter pine in coiling% | 0 | 0 | 0 | 0 | 0 |
| The defective rate of related scratches, etc.% | 0 | 0 | 0 | 0 | 0 |
。
Claims (4)
1. A control method for loosening of an inner diameter of advanced high-strength steel in leveling and coiling is characterized by comprising the following steps:
1) The angle from the arm-holding roller to the bitten point of the strip steel is less than 40 degrees, namely the included angle between the connecting line of the tangent point of the lower arm-holding roller and the coiling machine and the center of the coiling machine and the connecting line of the tangent point between the belt of the coil aid and the coiling machine and the center of the coiling machine is less than 40 degrees;
2) The distance between the lower arm-embracing roller and the winding drum is 3-5 mm;
3) The front end of the lower arm-holding roller is connected with an arc-shaped guide plate, and the arc-shaped guide plate and the surface of the winding drum form an involute shape, so that the head of the steel plate can be smoothly guided in;
4) When the wrapper is used for coiling the steel plate, the tension pressure of the belt is in direct proportion to the thickness of the strip steel, and the tension pressure of the belt is = (35 + the thickness (mm) of the steel plate) by 3 bar;
5) When the belt head is threaded, the height of the variable-height crease-resisting roller at the outlet of the temper mill is kept at the highest position, the highest position is always kept in the time from the threading start to the opening of the wrapper, and the position is kept for 12-20 seconds after the wrapper is opened; ensuring that the angle of the steel plate entering the wrapper is less than 40 degrees;
6) Controlling the time from the start of speed increase after threading to the time when the tension value reaches the peak tension within 5 s;
7) The speed of the radial expansion and in-place of the reel sector does not exceed 3s, and the diameters of the coil aid and the reel are ensured to be maximum after the strip steel enters the coil aid.
2. The method for controlling the inner diameter looseness of the advanced high-strength steel leveling coiling according to claim 1, wherein the arc-shaped guide plate is made of 42CrMO.
3. The method for controlling the loosening of the inner diameter of the leveling and coiling of the advanced high-strength steel according to claim 1, wherein the peak tension is 1.2 to 1.5 times of the normal coiling tension.
4. The method for controlling loosening of the inner diameter of the advanced high-strength steel leveling coiling according to claim 1, wherein the belt tensioning pressure is controlled to be 35-45bar.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210329188.9A CN114682646B (en) | 2022-03-31 | 2022-03-31 | Control method for advanced high-strength steel leveling coiling inner diameter looseness |
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| CN202210329188.9A CN114682646B (en) | 2022-03-31 | 2022-03-31 | Control method for advanced high-strength steel leveling coiling inner diameter looseness |
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| CN114682646A CN114682646A (en) | 2022-07-01 |
| CN114682646B true CN114682646B (en) | 2023-04-14 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347627A (en) * | 1998-06-04 | 1999-12-21 | Sumitomo Metal Ind Ltd | Metal strip winding method and winding apparatus |
| CN114178343A (en) * | 2021-11-17 | 2022-03-15 | 首钢智新迁安电磁材料有限公司 | Control method for coiling wrinkles of strip head of thin strip steel |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL247657A (en) * | 1959-02-03 | |||
| JP3723523B2 (en) * | 2002-04-15 | 2005-12-07 | 日新製鋼株式会社 | Steel strip winding device |
| CN105170701B (en) * | 2015-07-15 | 2017-11-24 | 莱芜钢铁集团电子有限公司 | A kind of strap rolling-assisting device |
| CN113664042B (en) * | 2020-05-13 | 2024-02-02 | 上海梅山钢铁股份有限公司 | Method for reducing overflow of coiling inner ring of cold tandem mill |
| CN113798323B (en) * | 2020-06-13 | 2023-04-14 | 上海梅山钢铁股份有限公司 | Control device and control method for implementing gapless steel pushing |
| CN216064907U (en) * | 2021-07-16 | 2022-03-18 | 首钢京唐钢铁联合有限责任公司 | Strip steel coiling assisting device and strip steel coiling device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11347627A (en) * | 1998-06-04 | 1999-12-21 | Sumitomo Metal Ind Ltd | Metal strip winding method and winding apparatus |
| CN114178343A (en) * | 2021-11-17 | 2022-03-15 | 首钢智新迁安电磁材料有限公司 | Control method for coiling wrinkles of strip head of thin strip steel |
Non-Patent Citations (1)
| Title |
|---|
| 栾贻忠等.莱钢冷轧平整机卷取系统的改造.轧钢.2011,(第05期),第59-61页. * |
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