CN116060446A - High-speed plate passing method and device and strip steel production line - Google Patents
High-speed plate passing method and device and strip steel production line Download PDFInfo
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- CN116060446A CN116060446A CN202310129010.4A CN202310129010A CN116060446A CN 116060446 A CN116060446 A CN 116060446A CN 202310129010 A CN202310129010 A CN 202310129010A CN 116060446 A CN116060446 A CN 116060446A
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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
- B21B15/0007—Cutting or shearing the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
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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
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
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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
- B21B2015/0057—Coiling the rolled product
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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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Abstract
The invention relates to a high-speed plate passing method, a device and a strip steel production line, which belong to the technical field of metal calendaring, wherein a low-pressure chamber with internal air pressure smaller than external environment air pressure is arranged between a high-speed flying shear and a coiling machine of the strip steel continuous casting and rolling production line so as to reduce air flow resistance in the strip steel travelling process, thereby improving the stability of the strip steel travelling process and the strip threading success rate, reducing the product waste loss caused by production accidents, improving the metal yield and comprehensively improving the production efficiency and economic benefit of the production line.
Description
Technical Field
The invention belongs to the technical field of metal calendaring, and relates to a high-speed plate passing method and device and a strip steel production line.
Background
Short-flow continuous casting and rolling is a technology which is successfully developed in the last 80 th century, is a revolutionary technology in the field of ferrous metallurgy after converter steelmaking and full continuous casting, and leads the development direction of the steel manufacturing technology. The successful development of the method realizes the organic combination of the continuous casting and the hot continuous rolling of the thin-specification casting blank, and is a great breakthrough of the near-net-shape manufacturing technology. The short-process continuous casting and rolling production technology is very beneficial to the construction of an energy-saving and environment-friendly society, and is used as the development trend of future ferrous metallurgy technology, and compared with the traditional hot continuous rolling, the short-process continuous casting and rolling technology has the outstanding advantage that the short-process continuous casting and rolling technology can be used for producing thin-specification strip steel which is difficult to produce by the traditional hot continuous rolling. The method is beneficial to the headless or semi-headless production process of the short-flow continuous casting and rolling technology, avoids the threading process with the highest failure rate during single block rolling of conventional hot continuous rolling, and greatly improves rolling stability compared with conventional hot continuous rolling.
When the short-process continuous casting and rolling is used for headless or semi-headless production, the strip steel is cooled to reach the target temperature through laminar cooling control after passing through a finishing mill group, sheared by a shearing machine, and then is led into different coiling machines to realize high-speed coiling, and the head of the next coiled strip steel is operated to a coiling machine to be coiled through the shearing machine for threading and coiling. Because the production line of continuous casting and rolling with short process is characterized by the production of ultrathin specification strip steel, and with the continuous breakthrough of high-pulling-speed continuous casting technology in recent years, the production speed of the rolling line is continuously accelerated, and the problems of strip steel vacation, stacking, winding and the like are very easy to occur in the process of running the strip steel with thin specification to a coiling machine after the strip steel is sheared by a shearing machine, the production line is stopped due to accidents, and the economic benefit and the productivity are reduced.
Patent documents such as CN102421545A, CN1239447A, CN101678420A, CN1671491a propose respective solutions to this problem, but the problem is not effectively solved from the application effect point of view. In addition, with the progress of production technology, continuous casting billet pulling speed and thickness break through continuously, and the downstream market uses hot instead of cold trend to make higher demands on ultrathin and ultrathin products, the thickness of strip steel is continuously thinned, the production line speed is continuously increased, the problems of head vacation, stacking and winding during strip threading are increasingly outstanding, and the production line faults are increased, so that the method becomes a big bottleneck for restricting the efficient production of ultrathin strip steel.
Disclosure of Invention
In view of the above, the present invention is to provide a high-speed plate passing method, device and strip steel production line, so as to solve the problems of strip steel emptying, stacking and winding caused by the speed difference between the head and the subsequent part of the strip steel during strip threading.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a high-speed plate passing method is characterized in that a low-pressure chamber with internal air pressure smaller than external environment air pressure is arranged between a high-speed flying shear and a coiling machine of a strip steel continuous casting and rolling production line, so that air flow resistance in the strip steel travelling process is reduced.
Optionally, the air pressure in the low-pressure chamber is arranged in sections, at least 3 sections, and the air pressure is firstly lowered and then raised along the conveying direction of the strip steel.
Alternatively, the internal pressure at the inlet end of the low pressure chamber and the outlet end of the low pressure chamber is 10 5 Pa～10 2 Pa, internal pressure in the middle of the low-pressure chamber is 10 5 Pa～10 -2 Pa。
Optionally, when the coiling machine is multi-rack, a low pressure chamber is also arranged between the coiling machines.
The high-speed plate passing device comprises an inlet chamber, a body chamber and an outlet chamber which are sequentially arranged along the strip steel conveying direction, wherein the air pressure of each chamber is firstly reduced and then increased along the strip steel conveying direction and is lower than the external environment air pressure; and narrow slits are arranged at positions of the chambers corresponding to the strip steel to allow the strip steel to pass through.
Optionally, a sealing device is arranged at the position of each chamber corresponding to the strip steel, and the sealing device is provided with a narrow slit to allow the strip steel to pass through.
Optionally, each chamber is connected with an air pressure adjusting device.
Optionally, the length of the body chamber is greater than the length of the inlet chamber, the outlet chamber.
Alternatively, the inlet chamber is a chamber or is composed of a plurality of subchambers connected in sequence, and when the inlet chamber comprises a plurality of subchambers, the air pressure of each subchamber of the inlet chamber gradually decreases along the conveying direction of the strip steel.
Optionally, the body chamber is a chamber or is composed of a plurality of subchambers connected in sequence, and when the body chamber comprises a plurality of subchambers, the air pressure of each subchamber of the body chamber is the same along the conveying direction of the strip steel.
Alternatively, the outlet chamber is a chamber or is composed of a plurality of subchambers connected in sequence, and when the outlet chamber comprises a plurality of subchambers, the air pressure of each subchamber of the outlet chamber gradually rises along the conveying direction of the strip steel.
The strip steel production line comprises a slab rolling unit, a high-speed flying shear and a coiling unit which are sequentially arranged along the rolling direction, wherein the high-speed plate passing device is arranged between the high-speed flying shear and the coiling unit.
Optionally, the coiling unit comprises at least two coiling machines, and a high-speed plate passing device is arranged between the adjacent coiling machines.
The invention has the beneficial effects that:
the low-pressure chamber with internal air pressure smaller than external environment air pressure is arranged between the high-speed flying shears and the coiling machine of the strip steel continuous casting and rolling production line, so that the problems of accidents such as strip steel vacation, stacking and winding caused by speed difference between the high-speed flying shears and the strip steel at the subsequent part due to head speed reduction under air flow resistance when the head of the strip steel sheared by the high-speed flying shears is warped or flies in the high-speed advancing process due to external factors when the strip steel is in coiling switching are solved. Therefore, the invention can lead the head of the strip steel to be threaded rapidly and successfully, reduce the production accidents caused by the threading failure, further reduce the downtime of the production line and improve the productivity of the production line; the equipment damage caused by production accidents is reduced, and the service life of the equipment is prolonged; and the product waste loss caused by production accidents is reduced, so that the metal yield is improved, and the production efficiency and the economic benefit of the production line are comprehensively improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic layout of embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a high-speed board passing device in embodiment 1;
fig. 3 is a schematic layout of embodiment 2 of the present invention.
Reference numerals: the high-speed plate passing device 1, a rolling unit 2, a high-speed flying shear 3, a coiling unit 4, strip steel 5, an inlet chamber 101, a body chamber 102, an outlet chamber 103, a chamber 1001, a conveying roller way 1002, a sealing device 1003, an air pressure adjusting device 1004, a pinch roll 301 and a first coiling machine 401.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 3, a high-speed plate passing method is provided, in which a low-pressure chamber with internal air pressure smaller than external ambient air pressure is arranged between a high-speed flying shear 3 and a coiling machine of a strip steel continuous casting and rolling production line, so as to reduce air flow resistance in the travelling process of strip steel 5.
According to the invention, the low-pressure chamber with the internal air pressure smaller than the external ambient air pressure is arranged between the high-speed flying shears 3 and the coiling machine of the strip steel continuous casting and rolling production line, so that the obstruction to the strip steel 5 caused by the sum of acting forces such as air flow resistance, gravity, impact force and the like in the advancing process of the strip steel 5 is reduced, the stability and the threading success rate of the strip steel 5 in the advancing process are improved, the product waste loss caused by production accidents is reduced, the metal yield is improved, and the production efficiency and the economic benefit of the production line are comprehensively improved.
Optionally, the air pressure in the low-pressure chamber is arranged in sections, at least 3 sections, and the air pressure is firstly lowered and then raised along the conveying direction of the strip steel; the internal pressure at the inlet end of the low-pressure chamber and the outlet end of the low-pressure chamber is 10 5 Pa～10 2 Pa, internal pressure in the middle of the low-pressure chamber is 10 5 Pa～10 -2 Pa; when the coiling machines are multiple, a low-pressure chamber is also arranged between the coiling machines.
A high-speed plate passing device 1 comprises an inlet chamber 101, a body chamber 102 and an outlet chamber 103 which are sequentially arranged along the strip steel conveying direction, wherein the air pressure of each chamber is firstly reduced and then increased along the strip steel conveying direction and is lower than the external environment air pressure.
Optionally, each chamber is provided with a narrow slit corresponding to the strip steel 5 to allow the strip steel to pass through; a sealing device 1003 is arranged at the position of each cavity corresponding to the strip steel 5, and the sealing device 1003 is provided with a narrow slit to allow the strip steel 5 to pass through; each chamber is connected with an air pressure regulating device 1004; the inlet chamber 101 is a chamber or is composed of a plurality of subchambers connected in sequence, and when the inlet chamber 101 comprises a plurality of subchambers, the air pressure of each subchamber of the inlet chamber 101 gradually decreases along the conveying direction of the strip steel 5; the length of the body chamber 102 is greater than the lengths of the inlet chamber 101 and the outlet chamber 103; the body chamber 102 is a chamber or is composed of a plurality of subchambers which are connected in sequence, and when the body chamber 102 comprises a plurality of subchambers, the air pressure of each subchamber of the body chamber 102 is the same along the conveying direction of the strip steel 5; the outlet chamber 103 is a chamber or is composed of a plurality of sub-chambers connected in series, and when the outlet chamber 103 includes a plurality of sub-chambers, the air pressure of each sub-chamber of the outlet chamber 103 gradually increases in the conveying direction of the strip 5.
The strip steel 5 production line comprises a slab rolling unit 2, a high-speed flying shear 3 and a coiling unit 4 which are sequentially arranged along the rolling direction, wherein the high-speed plate passing device 1 is arranged between the high-speed flying shear 3 and the coiling unit 4; when the coiler group 4 comprises at least two coilers, a high-speed plate passing device 1 is also arranged between adjacent coilers.
Example 1
As shown in fig. 1 and 2, a high-speed sheet passing device 1, applied to a continuous casting and rolling production line, is arranged between a high-speed flying shear 3 and a coiler 4, and is composed of an inlet chamber 101, a body chamber 102 and an outlet chamber 103. Each chamber of the high-speed board passing device 1 is respectively composed of a chamber body 1001, an internal conveying roller way 1002, a sealing device 1003 and an air pressure regulating device 1004. The positions of the inlet chamber 101 and the outlet chamber 103 corresponding to the strip steel are sealed by adopting a sealing device. The sealing device is provided with a narrow slit allowing the strip steel to pass through, and the horizontal position of the narrow slit is matched with the height of the conveying roller way. Wherein, each position barometric pressure relation is: the external ambient pressure is greater than the internal pressure of the inlet (outlet) chamber and is greater than or equal to the internal pressure of the body chamber. When the strip steel is sheared by the shearing machine 3, the strip head starts to penetrate the strip, and when the strip head enters the inlet chamber 101 of the high-speed plate passing device 1 from the outlet of the pinch roll 301 of the high-speed flying shear 3, the air pressure of the inlet chamber is far lower than the air pressure of the outside air, and the strip head cannot be unstable due to air flow disturbance; the tape head then enters the body cavity 102, the air pressure of the body cavity is in the air pressure area from low vacuum to high vacuum, and even if the tape head impacts the roller way due to the height difference of the roller way or the tape head warps due to the plate-shaped defect, the tape head flying phenomenon can not occur due to air flow resistance, the tape head in the vacuum environment can keep stable running, and finally the tape is successfully worn to the coiling machine.
Example 2
As shown in fig. 3, in embodiment 2, a high-speed sheet passing device is also provided between the coiler 401 and the coiler 402, as compared with embodiment 1.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (10)
1. A method for high-speed board passing, which is characterized in that: a low-pressure chamber with internal air pressure smaller than external ambient air pressure is arranged between the high-speed flying shears and the coiling machine of the strip steel continuous casting and rolling production line, so that air flow resistance in the strip steel travelling process is reduced.
2. A method of high speed board passing according to claim 1, wherein: the air pressure in the low-pressure chamber is arranged in sections, at least 3 sections, and the air pressure is firstly lowered and then raised along the conveying direction of the strip steel.
3. A according to claim 1The method for high-speed board passing is characterized by comprising the following steps of: the internal pressure at the inlet end of the low-pressure chamber and the outlet end of the low-pressure chamber is 10 5 Pa～10 2 Pa, internal pressure in the middle of the low-pressure chamber is 10 5 Pa～10 -2 Pa。
4. A method of high speed board passing according to claim 1, wherein: when the coiling machines are multiple, a low-pressure chamber is also arranged between the coiling machines.
5. The utility model provides a high-speed logical board device which characterized in that: the device comprises an inlet chamber, a body chamber and an outlet chamber which are sequentially arranged along the strip steel conveying direction, wherein the air pressure of each chamber is firstly reduced and then increased along the strip steel conveying direction and is lower than the external environment air pressure; and narrow slits are arranged at positions of the chambers corresponding to the strip steel to allow the strip steel to pass through.
6. A high-speed board passing device according to claim 5, wherein: each cavity is connected with an air pressure adjusting device.
7. A high-speed board passing device according to claim 5, wherein: the length of the body chamber is longer than that of the inlet chamber and the outlet chamber.
8. A high-speed board passing device according to claim 5, wherein: the inlet chamber is a chamber or consists of a plurality of subchambers which are connected in sequence, and when the inlet chamber comprises a plurality of subchambers, the air pressure of each subchamber of the inlet chamber is gradually reduced along the strip steel conveying direction; the body cavity is a cavity or consists of a plurality of subchambers which are sequentially connected, and when the body cavity comprises the subchambers, the air pressure of each subchamber of the body cavity is the same along the strip steel conveying direction; the outlet chamber is a chamber or consists of a plurality of subchambers which are connected in sequence, and when the outlet chamber comprises a plurality of subchambers, the air pressure of each subchamber of the outlet chamber gradually rises along the strip steel conveying direction.
9. The utility model provides a belted steel production line, includes slab rolling unit, high-speed flying shear and the batch unit that sets up in order along the rolling direction, its characterized in that: a high-speed plate passing device as set forth in any one of claims 5 to 8 is arranged between the high-speed flying shears and the coiling unit.
10. The strip steel production line according to claim 9, wherein: the coiling unit comprises at least two coiling machines, and a high-speed plate passing device is arranged between the adjacent coiling machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310129010.4A CN116060446A (en) | 2023-02-17 | 2023-02-17 | High-speed plate passing method and device and strip steel production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310129010.4A CN116060446A (en) | 2023-02-17 | 2023-02-17 | High-speed plate passing method and device and strip steel production line |
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| Publication Number | Publication Date |
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| CN116060446A true CN116060446A (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310129010.4A Pending CN116060446A (en) | 2023-02-17 | 2023-02-17 | High-speed plate passing method and device and strip steel production line |
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| CN (1) | CN116060446A (en) |
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- 2023-02-17 CN CN202310129010.4A patent/CN116060446A/en active Pending
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