CN116944280A - Hot rolling leveling line tightening operation method - Google Patents
Hot rolling leveling line tightening operation method Download PDFInfo
- Publication number
- CN116944280A CN116944280A CN202310889141.2A CN202310889141A CN116944280A CN 116944280 A CN116944280 A CN 116944280A CN 202310889141 A CN202310889141 A CN 202310889141A CN 116944280 A CN116944280 A CN 116944280A
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- China
- Prior art keywords
- coil
- steel coil
- uncoiler
- steel
- slow
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Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000005098 hot rolling Methods 0.000 title claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 58
- 239000010959 steel Substances 0.000 claims abstract description 58
- 230000008569 process Effects 0.000 claims abstract description 26
- 238000004804 winding Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000005452 bending Methods 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 239000011229 interlayer Substances 0.000 abstract description 11
- 208000034656 Contusions Diseases 0.000 abstract description 9
- 230000009519 contusion Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 2
- 238000003908 quality control method Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000013072 incoming material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/05—Stretching combined with rolling
-
- 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
- B21C47/16—Unwinding or uncoiling
- B21C47/18—Unwinding or uncoiling from reels or drums
-
- 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
- B21C47/24—Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer
Abstract
The invention belongs to the technical field of surface quality control of hot-rolled steel coil leveling unit production lines, and relates to a hot-rolled leveling line tightening operation method. 1) After the threading is completed, the diameter data of the raw coil is trimmed by 10mm, a series-connected slow-running handle is operated, so that the speed of a winding drum of the uncoiler is higher than the rotation speed of a steel coil, and the inner ring of the steel coil is screwed; 2) The deep bending roller is pressed down, so that the stability of the steel coil in the rotation process is ensured; 3) And simultaneously observing the load of the uncoiler displayed on the HMI picture in the series slow running process, wherein the repeated change of the load indicates that the steel coil is being coiled, the load is stably maintained to be more than 100% for 5 seconds, and the coiling is completed. Through the steel coil of the operation, the original problem of loose inner ring can be slowly screwed, and the interlayer contusion caused by severe interlayer dislocation in the subsequent tension building process can be effectively avoided.
Description
Technical Field
The invention belongs to the technical field of surface quality control of hot-rolled steel coil leveling unit production lines, and relates to a hot-rolled leveling line tightening operation method.
Background
Aiming at the problem of inner ring unwinding of a flat raw material roll, the main domestic solutions at present are as follows: 1) The steel coil with less inner ring loosening phenomenon (less than 3 circles) is directly cut by flame, and has the advantages of no treatment on a production line, no influence on the production efficiency of the production line, relatively complete unreeling treatment, difficult cleaning of cutting welding slag and easy adverse effect on the roller surface of a channel of the production line after being put on a machine; 2) When the coil is supported by the coiling trolley in the coiling process, the coil is expanded while rotating, so that the inner ring of the coil is basically screwed, the coil can be operated in the coiling process, the production line efficiency is basically not greatly influenced, the defect is that the coil is not explicitly screwed or not is not judged, the coil loosening problem is not thoroughly treated, particularly, the number of layers of the coil is more, but the interval between the layers of the coil is not large, and the risk of interlayer contusion still exists in the tension building process; 3) The tension is gradually increased at the low tension position after the threading is finished, the inner ring is screwed at a low speed, the efficiency of the machine set is not affected completely, the requirement on the operation skill of operators is high, and the situation that the thin-specification variety is easily subjected to deflection rolling and rotting in a low tension state causes larger quality loss is caused.
The invention effectively and definitely uses the load of the uncoiler as a judgment basis, can ensure the final coiling effect, has low skill requirements on operators, is only connected in series and slowly runs before tension is not established, and does not have larger quality risk.
Disclosure of Invention
The invention aims to solve the problems and provides a hot rolling leveling wire coiling operation method.
The purpose of the invention is realized in the following way: a hot rolling leveling wire coiling operation method comprises the following steps: step one: after the flat wire threading is completed, before tension is established, the deep bending roller is pressed for tightening and winding; step two: before the operation of the tandem slow running, the coil diameter of the steel coil on the uncoiler is enlarged by 8-15mm, meanwhile, the outer ring of the steel coil is fixed by pressing down the deep bending roller, and the production line speed during the operation of the tandem slow running is controlled according to 10-20 m/min; step three: and (3) during the series slow running operation, observing the load value of the uncoiler, wherein the continuous jump process of the load value of the uncoiler is the coil tightening process, and after the load value is continuously kept at 100% for 5 seconds, completing coil tightening.
And when the operation is slow in series connection in the second step, the actual rotating speed of the winding drum is the production line speed/pi (the outer diameter of the steel coil after modification and amplification), and the actual strip steel running speed of the outer ring of the steel coil is the actual rotating speed pi of the winding drum.
Compared with the current cutting method, the uncoiler independent rotary screwing method and the low-tension operation method for treating the problem of loosening the inner ring of the flat raw material coil, the method has the following beneficial effects: the cutting welding slag caused by a cutting method is not generated, and the hidden danger of the quality of a production line channel caused by the welding slag is avoided; compared with the independent rotary screwing of the uncoiling machine, the method has the greatest advantages that the coil tightening effect can be intuitively judged through picture display, and the coil tightening effect is better for the coil with a large number of coil loosening layers and small coil loosening interval. Compared with the low-tension position tension building operation, the method can effectively avoid deflection rolling and rotting caused by small-tension operation and ensure rolling stability.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic view of a flat entry device of the present invention.
Wherein: 1. the leveling machine comprises a leveling machine supporting roller, a leveling machine working roller, a strip steel, a straightening roller, an inlet pinch roller, an uncoiler winding drum and a deep bending roller, wherein the strip steel is arranged in the direction of an arrow.
Description of the embodiments
The invention aims to eliminate the inner ring loosening phenomenon of the raw material roll before the flat wire is tensioned and produced, avoid the interlayer contusion defect caused by the loosening in the tensioning process and ensure the surface quality state of the final product.
The invention mainly aims at the problem of inner ring loosening phenomenon of a flat wire raw material roll and the problem of easy interlayer contusion of a steel coil surface caused by a tension acting wire, and the principle that the diameter value of a steel coil participates in calculating the rotation speed of a reel of an uncoiler by utilizing a control program in a serial slow-running process is utilized to properly increase the diameter value of the steel coil before tension is established by a production line, so that the rotation speed of the reel of the uncoiler is reduced, the speed difference is established between the reel and a straightener, the inner ring loosening phenomenon in the serial slow-running process is eliminated by utilizing the speed difference, the interlayer contusion problem caused in the tension establishing process is avoided, and the surface quality of the flat steel coil is improved.
The innovation point of the invention is that: 1) After the flat wire threading is completed, the diameter data of the raw coil is trimmed by 10mm, a series-connected slow-running handle is operated, so that the speed of a winding drum of the uncoiler is higher than the rotation speed of a steel coil, and the inner ring of the steel coil is screwed; 2) The deep bending roller is pressed down to carry out the tightening operation, so that the stability of the steel coil in the rotation process is ensured; 3) And in the process of series slow running, simultaneously observing the load of the uncoiler displayed by the HMI picture, wherein the repeated change of the load indicates that the steel coil is being coiled, the load is stably kept at 100% for more than 5 seconds, and the coiling is completed. 4) And after the coiling operation is completed, carrying out tension building operation.
Through the steel coil of the operation, the original problem of loose inner ring can be slowly screwed, and the interlayer contusion caused by severe interlayer dislocation in the subsequent tension building process can be effectively avoided. The control thinking of the series slow operation of the leveling machine set is as follows: after threading is completed, the serial slow-running handle is operated, the corresponding rotating speed of the transmission shaft is calculated according to the diameters of all process rollers (straightening rollers and pinch rollers) on the production line and the rotating speed of the corresponding drum transmission shaft is calculated according to the diameters of timely steel coils on the uncoiler and the coiling drum, so that the running speeds of related equipment and strip steel on the production line in the serial slow-running process are always ensured, and abnormal conditions such as steel pulling, steel piling and surface scratch are not generated.
By utilizing the principle, after threading is completed, the coil diameter of the steel coil on the uncoiler is enlarged by 10mm before the operation of the tandem slow running, meanwhile, the outer ring of the steel coil is fixed by pressing down the deep bending roller, in this case, when the operation of the tandem slow running is performed, the production line speed is controlled according to 15.3m/min, if the original outer diameter value of the steel coil is 1.5m, the actual rotating speed of the winding drum is 15.3m/min (1.5 m pi) =3.25 rpm, and if the diameter of the steel coil is changed to 1.51m before the operation, the control rotating speed of the winding drum is 15.3m/min (1.51 m pi) =3.23 rpm, and the actual strip steel running speed of the outer ring of the steel coil is: 3.23rpm is 1.5=15.20 m/min, a tiny speed difference (15.3-15.2)/15.3 is 100% =0.66% exists between the coil and the straightener, and the coil is slowly screwed in a slow running state of 15.3m/min under the action of the speed difference, so that interlayer contusion caused by instant tension building is avoided.
The invention is firstly applied and implemented in the process of producing annealed stainless steel T4003 by 1549 flattening lines, and the specific operation process is as follows.
The steel coil is sleeved into the winding drum, the edge of the winding drum is turned upside down, the winding drum is turned upside down continuously after the winding drum is turned upside down, the steel coil is turned tightly for the first time by using the upper and lower bellying steel coils of the winding trolley, and severe interlayer contusion caused by the screwing of the large-gap loose coil is prevented.
And (3) controlling the production line speed when the operation is in series connection slowly according to 15.3m/min, wherein the outer diameter value of the steel coil of the uncoiler with the L1 picture of the leveling main operation HMI system is slightly larger than the outer diameter value of the steel rolling self-belt of the MES system by 10 mm.
And operating the tandem slow-running handle, pressing down the deep bending roller, and simultaneously observing that the motor load of the uncoiler of the HMI picture rises to 100 percent, if the motor load has the phenomenon of repeated falling back, continuing tandem slow-running (indicating that a gap exists in the steel coil), and building a tension press roller after the motor load of the uncoiler is 100 percent and is stable for about 5 seconds in the tandem slow-running state, and then normally operating and starting the car.
The invention is applied and implemented in the process of producing the magnetic pole steel 345TP181 with the thickness of 1.5-2.0mm by 1549 flat lines, and the phenomenon of large gap looseness of the inner ring is rarely caused because the whole coil is slightly loosened in the thin magnetic pole steel, so the specific operation process is as follows.
When the coil is wound, whether the incoming material has the phenomenon of large-gap loose coil of the inner ring or not is observed, and if the incoming material has the phenomenon, the following steps are performed: the steel coil is sleeved into the winding drum, the edge of the winding drum is turned upside down, the winding drum is turned upside down continuously after the winding drum is turned upside down, the steel coil is turned tightly for the first time by using the upper and lower bellying steel coils of the winding trolley, and severe interlayer contusion caused by the screwing of the large-gap loose coil is prevented. If no obvious large-gap loose ring exists in the inner ring, the next step is directly carried out.
The outer diameter value of a steel coil of an uncoiler with an L1 picture of a leveling main operation HMI system is slightly larger than the outer diameter value of a steel rolling self-belt of an MES system (because the whole coil is slightly uncoiled and the set speed difference is larger), and the production line speed when the operation is in series connection is controlled according to 15.3 m/min.
The series slow-running handle is operated, the deep bending roller is pressed down, meanwhile, the motor load of the uncoiler of the HMI picture is observed to rise to 100%, if the motor load has the phenomenon of repeated falling back, the series slow-running is continued (the inside of a steel coil is indicated to have a gap) (compared with T4003, the process is longer), and when the motor load of the uncoiler is 100%, the motor load of the uncoiler is stabilized for about 5 seconds in the series slow-running state, the tension press roller is built for subsequent normal operation and starting.
The invention is applied and implemented in the process of producing the military steel A500 by 2250 flat line, and the 1/2 coil of the inner ring is slightly loosened, so that the large-gap ring loosening phenomenon of the inner ring is completely avoided due to thicker specification, and the specific operation process is as follows.
Normally, the steel coil is fed onto a coiling block of an uncoiler to finish uncoiling and threading operations.
The outer diameter value of a steel coil of an uncoiler with an L1 picture of a leveling main operation HMI system is slightly larger than the outer diameter value of a steel rolling self-belt of an MES system (because the specification is thicker, the uncoiling part is only about 1/2 and the setting speed difference is required to be smaller), and the production line speed when the operation is in series connection is controlled according to 15.3 m/min.
And operating the tandem slow-running handle, pressing down the deep bending roller, and simultaneously observing that the motor load of the uncoiler of the HMI picture rises to 100 percent, if the motor load has the phenomenon of repeated falling back, continuing tandem slow-running (indicating that a gap exists in the steel coil), and building a tension press roller after the motor load of the uncoiler is 100 percent and is stable for about 5 seconds in the tandem slow-running state, and then normally operating and starting the car.
The above embodiments are merely examples of the present invention, but the present invention is not limited to the above embodiments, and any changes or modifications within the scope of the present invention are intended to be included in the scope of the present invention.
Claims (2)
1. A hot rolling leveling line tightening operation method is characterized in that: the method comprises the following steps:
step one: after the flat wire threading is completed, before tension is established, the deep bending roller is pressed for tightening and winding;
step two: before the operation of the tandem slow running, the coil diameter of the steel coil on the uncoiler is enlarged by 8-15mm, meanwhile, the outer ring of the steel coil is fixed by pressing down the deep bending roller, and the production line speed during the operation of the tandem slow running is controlled according to 10-20 m/min;
step three: and (3) during the series slow running operation, observing the load value of the uncoiler, wherein the continuous jump process of the load value of the uncoiler is the coil tightening process, and after the load value is continuously kept at 100% for 5 seconds, completing coil tightening.
2. The hot rolling leveling wire reeling operation method according to claim 1, characterized in that: and when the operation is slow in series connection in the second step, the actual rotating speed of the winding drum is the production line speed/pi (the outer diameter of the steel coil after modification and amplification), and the actual strip steel running speed of the outer ring of the steel coil is the actual rotating speed pi of the winding drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310889141.2A CN116944280A (en) | 2023-07-20 | 2023-07-20 | Hot rolling leveling line tightening operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310889141.2A CN116944280A (en) | 2023-07-20 | 2023-07-20 | Hot rolling leveling line tightening operation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116944280A true CN116944280A (en) | 2023-10-27 |
Family
ID=88456008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310889141.2A Pending CN116944280A (en) | 2023-07-20 | 2023-07-20 | Hot rolling leveling line tightening operation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116944280A (en) |
-
2023
- 2023-07-20 CN CN202310889141.2A patent/CN116944280A/en active Pending
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