CN109127775B - Strip steel coiling method - Google Patents
Strip steel coiling method Download PDFInfo
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- CN109127775B CN109127775B CN201810972533.4A CN201810972533A CN109127775B CN 109127775 B CN109127775 B CN 109127775B CN 201810972533 A CN201810972533 A CN 201810972533A CN 109127775 B CN109127775 B CN 109127775B
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- Prior art keywords
- side guide
- strip steel
- coiling
- pressure
- guide plate
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
Abstract
The invention discloses a strip steel coiling method which comprises the steps of strip steel hot head and tail heating, side guide plate pressure parameter setting, side guide plate short stroke parameter setting and wrapper roller parameter setting. Specifically, when the pressure parameter of the side guide plate is set, the first coiling machine is set to be + 50% -70%, the second coiling machine is set to be + 30% -35%, and the actual display pressure value of the side guide plate is 50-70 KN as the standard; when the short stroke parameter of the side guide plate is set, the first coiling machine is set to be 35-50 mm, and the second coiling machine is set to be 40-50 mm; when the wrapper roller parameters are set, the pressure of the first wrapper roller is set to be 20-30%, the pressure of the second wrapper roller is set to be 20-30%, and the pressure of the third wrapper roller is set to be 20-25%. The strip steel coiling method can reduce the risks of poor thick-specification coiling shape, slippage of a coiling machine, coil loosening and the like of steel grades in a low-temperature coiling process.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a strip steel coiling method which is particularly suitable for ultra-thick high-strength high-toughness X80 steel.
Background
With the rapid development of the economy of China, the demand and the dependence of the economy of China on natural gas energy are increasing day by day. The natural gas consumption of China increases by about 16% every year in 2010-2015, and the increasing speed is still accelerated. By 2020, our country's demand for natural gas is expected to reach 4000 billion cubic meters. China is vast in territory, more than 60% of natural gas resources are concentrated in western inland regions, and the main consumption markets are concentrated in eastern and middle economically developed regions beyond thousands of miles. In the face of the characteristic of unbalanced region of natural gas resource distribution and market demand, the problem of transregional long-distance transportation of natural gas is urgently to be solved. Natural gas pipeline transportation is the primary option to effectively address this energy dilemma. Since X80(X80 represents pipeline steel with the minimum yield strength of 80kpsi, and is converted into pipeline steel with the metric unit of about 552MPa) is adopted on a large scale from the West-east gas transmission line, the main force steel grades adopted on a large scale by the current domestic natural gas pipeline main line are all X80 steel. Through years of scale production and improvement, the X80 pipeline steel production and pipeline construction capacity in China is still in the international leading position.
The X80 pipeline steel has extremely high requirements on comprehensive properties such as strength, hardness, impact toughness and the like, and particularly, the development of the extremely thick pipeline steel X80 puts higher requirements on a hot rolling process. The low-temperature coiling process is a key factor for obtaining the tissue and performance stability of the ultra-thick X80 pipeline, and in order to meet the performance of the ultra-thick X80 pipeline steel, a coiling process with the minimum coiling temperature of less than 400 ℃ is generally adopted, so that the tissue characteristics required by the performance of the ultra-thick X80 pipeline steel are ensured, but the biggest problems caused by the low-temperature coiling process are that the thick coiling shape is poor, a coiling machine slips and the coiling accident is easy to occur.
Therefore, how to reduce the risks of poor thick-gauge coil shape, slipping of a coiler, coil loosening and the like of the steel grade in the low-temperature coiling process is a technical problem to be solved urgently by the technical personnel in the field at present.
Disclosure of Invention
In view of the above, the present invention is directed to a strip steel coiling method, which can reduce the risks of poor thick-gauge coil shape, slipping of a coiler, coil loosening and the like of steel grades in a low-temperature coiling process.
In order to achieve the purpose, the invention provides the following technical scheme:
a strip steel coiling method, comprising:
heating the strip steel to the tail;
setting pressure parameters of the side guide plate: the first coiling machine is set to be + 50% -70%, the second coiling machine is set to be + 30% -35%, and the actual display pressure value of the side guide plate is 50-70 KN as a standard;
setting short stroke parameters of the side guide plate: the first coiler is set to be 35-50 mm, and the second coiler is set to be 40-50 mm;
setting parameters of the wrapper roller: the pressure of the first wrapper roller is set to be 20-30%, the pressure of the second wrapper roller is set to be 20-30%, and the pressure of the third wrapper roller is set to be 20-25%.
Preferably, in the strip steel coiling method, the length of the hot head of the strip steel is controlled to be 2.5-3.6 meters, and the length of the hot tail of the strip steel is controlled to be 2.0-3.0 meters.
Preferably, in the strip steel coiling method, the side guide plate of the first coiling machine is controlled by transmission side pressure.
Preferably, in the strip winding method, the layer cooling roll pass hysteresis rate is set to 10%.
Preferably, in the strip steel coiling method, when both sides of the strip steel are not in contact with the side guide plates, the opening degree of the side guide plates is closed;
and when the pressure of the pressure control side of the side guide plate is zero or is lower than a preset pressure value, the pressure of the pressure control side is increased, and the maximum pressure of the two sides reaches 80 KN.
Preferably, in the strip coiling method, the strip coiling method further comprises coil stripping control:
after the strip steel is coiled, controlling the first wrapper roll and the third wrapper roll to enter, pressing the strip steel, then controlling the second wrapper roll to open, and inching the winding drum to rotate the tail of the strip steel to a position between 4:30 and 5: 30;
manually lifting the coil stripping trolley until a rising signal is in place, inching and rotating the winding drum to carry out strip steel tail alignment, and rotating the tail of the strip steel to 6: 30 position to 7: stopping when the coil stripping trolley is between 00 positions, and locking a locking cylinder of the coil stripping trolley;
the inching reverses the winding drum for 2 to 3 times, the winding drum and the steel coil do not have interference back, the coil unloading trolley unloads the coil outwards, and the coil unloading trolley is conveyed to a bundling platform.
Preferably, in the strip coiling method, the strip is coiled by an automatic coiling method.
Preferably, in the strip coiling method, the strip is X80 steel.
According to the technical scheme, the strip steel coiling method provided by the invention has the advantages that the strip steel hot head and tail, the side guide plate pressure and position compensation parameter setting and the wrapper roll parameter setting are adopted, so that the coiling machine can be prevented from slipping, the tower shape and unwinding risk of a steel coil can be directly, effectively, conveniently and rapidly reduced greatly, and the higher coil shape qualified rate is ensured.
Detailed Description
The strip steel coiling method provided by the embodiment of the invention comprises the following steps:
firstly, the strip steel is heated to the hot end
Specifically, the length of a hot head of the strip steel is controlled to be 2.5-3.6 meters, and the length of a hot tail of the strip steel is controlled to be 2.0-3.0 meters.
Setting various parameters
(1) Setting pressure parameters of the side guide plate: the first coiling machine (also called as 1# coiling machine) is set to be + 50% -70%, the second coiling machine (also called as 2# coiling machine) is set to be + 30% -35%, and the actual display pressure value of the side guide plate is controlled to be 50-70 KN.
When the method is concretely implemented, the side guide plate of the first coiling machine is controlled by the pressure of the transmission side, and if the side guide plate is abnormal, the side guide plate is switched according to the actual situation; the second coiling machine is selected according to the actual coil shape, and both sides of the second coiling machine can be selected.
(2) Setting short stroke parameters of the side guide plate: the first coiler is set to be 35-50 mm, and the second coiler is set to be 40-50 mm.
(3) Setting parameters of the wrapper roller: the pressure of the first wrapper roll (also called 1# wrapper roll) is set to be 20-30%, the pressure of the second wrapper roll (also called 2# wrapper roll) is set to be 20-30%, and the pressure of the third wrapper roll (also called 3# wrapper roll) is set to be 20-25%. In the prior art, the pressure of the wrapper roll of common steel is set to be 0-15%. In the specific implementation, the pressure value of the wrapper roll is calculated according to the temperature, the width, the thickness, the thermal yield strength and the unit tension of the strip steel (for example, the common steel grade is about 60KN, and the X80 steel grade is calculated to be more than 200 KN), and the specific pressure values of different steel grades are different, so that the specific pressure values of the wrapper rolls are not specifically required in the invention.
(4) Setting the hysteresis rate of the laminar cooling roller path: the layer cooling roll was set to a hysteresis rate of 10%.
Third, side guide plate position and pressure control
The strip steel width and the short stroke value are the actual opening display value of the side guide plate:
when both sides of the strip steel are not contacted with the side guide plates, the manual inching of the position closing button of the side guide plates closes the opening degree of the side guide plates;
when the pressure on the pressure control side of the side guide plate is zero or lower than a preset pressure value (i.e., no pressure or too low), the pressure on the pressure control side of the side guide plate is increased. The specific operation is that the pressure increasing button of the side guide plate of the operation table top is pressed (5 KN is inching once), and the maximum pressure on two sides reaches 80 KN.
Fourthly, coil stripping control
Preferably, an automatic coiling mode is adopted for strip steel coiling, and after strip steel coiling is finished, a method of utilizing three-point stress of a coil stripping trolley to strip the tail is adopted for coil stripping control, namely: pressing a first wrapper roll and a third wrapper roll entering button, controlling the first wrapper roll and the third wrapper roll to enter, and simultaneously closing and pressing the strip steel; then a second wrapper roller outgoing button is pressed, the second wrapper roller is opened, and otherwise the second wrapper roller is interfered with the coil stripping trolley; the coiling block is inching to rotate the tail of the strip steel to a position between 4:30 and 5:30 (inching, namely when a button is pressed down, a motor rotates to work, and when a button is released by a hand, the motor stops rotating);
manually raise the coil stripping dolly until the rising signal targets in place (coil stripping dolly rises to indicate the arrow to change into white arrow head from green promptly), the inching rotates the reel and carries out belted steel to the tail, takes the mode of inching at a slow speed to carry out to the tail operation, the belted steel afterbody rotates to 6: 30 position to 7: stopping when the coil stripping trolley is between 00 positions, and locking a locking cylinder of the coil stripping trolley;
and (4) retracting the winding drum, inching the reverse winding drum for 2-3 times, manually unloading the coil from the coil unloading trolley outwards after the winding drum and the steel coil are not interfered, and conveying the coil to a bundling table.
The first wrapper roller and the third wrapper roller are respectively positioned at two sides of the steel coil, the second wrapper roller is positioned below the first wrapper roller, and the coil unloading trolley carrier roller is positioned under the steel coil.
In specific implementation, the strip steel coiling method can be suitable for strip steel of extremely thick specification, high strength and high toughness X80 steel grade.
Through comparison before and after implementation, when the strip steel coiling method provided by the embodiment of the invention is adopted to coil the strip steel, the coiling shape of the X80 steel with extremely thick specification can be effectively controlled, and the probability of coil loosening is greatly reduced.
In 3 months in 2018, the vanadium hot rolling line for the Xichang steel adopts the strip steel coiling method to produce the X80 pipeline steel with the extremely thick specification for the Russian gas transmission pipeline, the total weight of the X80 pipeline steel is 20000 more tons, and the coil shape qualified rate reaches 96%.
In conclusion, the strip steel coiling method provided by the embodiment of the invention can avoid the slippage of the coiling machine, directly, effectively, conveniently and quickly reduce the tower shape and coil loosening risks of the steel coil and ensure higher coil shape qualified rate by the methods of strip steel hot head and tail, side guide plate pressure and position compensation parameter setting, wrapper roller parameter setting, coil unloading trolley three-point stress tail alignment and the like.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A strip steel coiling method is characterized by comprising the following steps:
heating the hot head and the tail of the strip steel, wherein the strip steel is X80 steel, the minimum coiling temperature is less than 400 ℃, the hot head length of the strip steel is controlled to be 2.5-3.6 meters, and the hot tail length of the strip steel is controlled to be 2.0-3.0 meters;
setting pressure parameters of the side guide plate: setting the pressure of the side guide plates of the first coiling machine and the second coiling machine, and taking the actual display pressure value of the side guide plates as the standard of 50-70 KN;
setting short stroke parameters of the side guide plate: the side guide plate of the first coiling machine is set to be 35-50 mm, and the side guide plate of the second coiling machine is set to be 40-50 mm;
the side guide plate of the first coiling machine is controlled by transmission side pressure;
when both sides of the strip steel are not in contact with the side guide plates, closing the opening degrees of the side guide plates;
when the pressure of the pressure control side of the side guide plate is lower than a preset pressure value, the pressure of the pressure control side is increased, and the maximum pressure of the two sides reaches 80 KN;
the method also comprises coil stripping control:
after the strip steel is coiled, controlling a first wrapper roll and a third wrapper roll to enter to press the strip steel, then controlling a second wrapper roll to open, and inching a winding drum to rotate the tail part of the strip steel to a position between 4:30 and 5: 30;
manually lifting the coil stripping trolley until a rising signal is in place, inching and rotating the winding drum to carry out strip steel tail alignment, and rotating the tail of the strip steel to 6: 30 position to 7: stopping when the coil stripping trolley is between 00 positions, and locking a locking cylinder of the coil stripping trolley;
the inching reverses the winding drum for 2 to 3 times, and after the winding drum does not interfere with the steel coil, the coil unloading trolley unloads the coil outwards and conveys the coil to a bundling table.
2. The strip coiling method as defined in claim 1, wherein the layer cooling roll pass hysteresis rate is set to 10%.
3. The strip coiling method as defined in claim 1, wherein the strip is coiled in an automatic coiling manner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810972533.4A CN109127775B (en) | 2018-08-24 | 2018-08-24 | Strip steel coiling method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810972533.4A CN109127775B (en) | 2018-08-24 | 2018-08-24 | Strip steel coiling method |
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| CN109127775A CN109127775A (en) | 2019-01-04 |
| CN109127775B true CN109127775B (en) | 2021-04-23 |
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| CN112872099B (en) * | 2021-01-13 | 2023-03-24 | 首钢京唐钢铁联合有限责任公司 | Method and device for unloading steel coil |
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| JP2001150021A (en) * | 1999-09-08 | 2001-06-05 | Kataoka Mach Co Ltd | Winding device and winding method for metallic foil strip |
| CN2454054Y (en) * | 2000-11-28 | 2001-10-17 | 中国第二重型机械集团公司 | Hydraulic inlet side-guiding-board in front of coiling device |
| CN101716617B (en) * | 2009-12-31 | 2011-08-17 | 山西太钢不锈钢股份有限公司 | Reling method of thermal tandem rolling stainless steel band reeling equipment |
| CN102962296B (en) * | 2012-11-14 | 2015-06-10 | 北京首钢股份有限公司 | Low-temperature coiling method for thick X120 pipeline steel hot rolled coils |
| CN104267753B (en) * | 2014-09-02 | 2017-02-15 | 首钢京唐钢铁联合有限责任公司 | Pressure control method for coiling machine side guide plate |
| CN105817489B (en) * | 2015-01-06 | 2017-11-17 | 上海梅山钢铁股份有限公司 | A kind of TEMPERATURE FOR HOT STRIP LAMINAR cooling technique |
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