CN114405993B - Method for line bar production line head-removing rolling - Google Patents
Method for line bar production line head-removing rolling Download PDFInfo
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- CN114405993B CN114405993B CN202210107135.2A CN202210107135A CN114405993B CN 114405993 B CN114405993 B CN 114405993B CN 202210107135 A CN202210107135 A CN 202210107135A CN 114405993 B CN114405993 B CN 114405993B
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- rolling
- hot
- continuous rolling
- switcher
- rolled
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- 238000005096 rolling process Methods 0.000 title claims abstract description 80
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005098 hot rolling Methods 0.000 claims abstract description 52
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 abstract description 4
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
-
- 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
-
- 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
- B21B2015/0064—Uncoiling the rolled product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to a line head-removing rolling method for wire and bar production, and belongs to the technical field of metallurgy. The invention comprises the following steps that rolled pieces rolled by an upstream continuous rolling mill are guided into an idle roller way through a hot rolling front switcher for hot rolling, reversely uncoiled after hot rolling is finished, conveyed into a downstream continuous rolling mill through the hot rolling rear switcher, guided into another parallel idle roller way through the hot rolling front switcher, reversely uncoiled after hot rolling is finished, conveyed into the downstream continuous rolling mill through the hot rolling rear switcher, and continuous rolling production of wire and bar materials can be realized by repeating the steps. The invention ensures that rolled pieces are subjected to uniform temperature and heat preservation in the hot rolling box when the wire rod production line is subjected to head-off rolling, reduces temperature drop, ensures the uniformity of the temperature of the head and the tail of the rolled pieces when the rolled pieces enter the downstream continuous rolling unit for rolling in the opposite order with the upstream continuous rolling unit, thereby improving the uniformity of the tail temperature of the rolled pieces, and improving the overall working efficiency of a system through a plurality of parallel roller tables.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and relates to a method for wire rod production line head-removing rolling.
Background
For continuous rolling production lines of wire bars, especially excellent wire bars, or other types of wire bars without continuous rolling between a roughing mill set and a middle mill set, head-off rolling is generally adopted between the roughing mill set and the middle mill set, namely, a section of roller way is arranged between the roughing mill set and the middle mill set, and the length of the roller way is greater than the length of a rolled piece rolled by the roughing mill set, so that continuous rolling is not formed between the roughing mill set and the middle mill set, and the roughing mill set and the middle mill set are generally respectively called an upstream continuous mill set and a downstream continuous mill set.
The head-removing rolling mode adopting the roller way has the main defects that: the rolling sequence of the head and the tail of the rolled piece entering the downstream continuous rolling unit is the same as that of the upstream continuous rolling unit, so that the uniformity of the head and the tail of the rolled piece is difficult to ensure, and the uniformity of the product quality and the strip is unfavorable; the temperature drop loss of the rolled piece in the head-removing roller way section is large, and the energy is not saved; the length of the workshop is longer, and the investment of the factory building, civil engineering and the like is increased.
There is an urgent need for a system for use between an upstream tandem mill train and a downstream tandem mill train to ensure uniformity of temperature of the head and tail of a rolled product, and to reduce temperature drop of the rolled product without affecting processing efficiency of the rolled product.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for head-off rolling in a wire and bar production line, which improves the temperature difference between the head and the tail of a rolled piece and reduces the temperature drop of the rolled piece in a head-off roller section.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method for wire rod production line unheading rolling, comprising the steps of:
step 1: the method comprises the steps that a hot-rolling front switcher and a hot-rolling rear switcher are arranged between an upstream continuous rolling unit and a downstream continuous rolling unit, a roller way between the upstream continuous rolling unit and the downstream continuous rolling unit is divided into a plurality of parallel roller ways, and a hot-rolling front pinch roll, a hot-rolling box and a hot-rolling rear pinch roll are sequentially arranged on each parallel roller way along the conveying direction of rolled pieces;
step 2: the rolled piece rolled by the upstream continuous rolling unit is led into one idle roller way through a hot rolling front switcher, is conveyed into a hot rolling box through a hot rolling front pinch roller, and is coiled into a coil through the hot rolling box;
step 3: after coiling, the hot coil box reversely uncoils and is guided into a downstream continuous rolling mill set for rolling through a hot coil rear pinch roll and a hot coil rear switcher;
step 4: the next rolled piece rolled by the upstream continuous rolling unit is led into another parallel idle roller way through a hot rolling front switcher, is conveyed into a hot rolling box through a hot rolling front pinch roller, and is coiled into a roll through the hot rolling box;
step 5: after coiling, the hot coil box reversely uncoils and is sent into a downstream continuous rolling mill set for rolling through a hot coil rear pinch roll and a hot coil rear switcher;
step 6: and (5) sequentially repeating the steps 2 to 5, and repeating the steps to realize continuous rolling production of the wire rod.
Further, two parallel roller tables are arranged between the upstream continuous rolling unit and the downstream continuous rolling unit.
Further, when the hot box is coiled into a coil, the coiling speed of the rolled piece is matched with the outlet speed of the rolled piece of the upstream continuous rolling mill.
Further, the uncoiling speed of the rolled piece is matched with the inlet speed of the rolled piece of the downstream continuous rolling mill when the hot coil box uncoils.
The invention has the beneficial effects that:
1. the invention ensures that rolled pieces in the wire rod production line are subjected to uniform temperature and heat preservation in the hot rolling box during head-removing rolling, reduces temperature drop, ensures that the rolling sequence of the rolled pieces after uncoiling is opposite to that of the rolled pieces after the rolling of the downstream continuous rolling machine, and can ensure the uniformity of the temperature of the head and the tail of the rolled pieces, thereby improving the uniformity of the whole strip of the quality of the final product.
2. The invention adopts the hot rolling box to roll the wire rod into the coil, shortens the length of the production line, greatly reduces investment of factory buildings, civil engineering and the like, and improves the working efficiency of rolled piece processing through a plurality of parallel roller tables.
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 structural view of the present invention.
Reference numerals: a 1-hot coil front switcher, a 2-first hot coil front pinch roll, a 3-first hot coil box, a 4-first hot coil rear pinch roll, a 5-hot coil rear switcher 6-first flying shears, 7-second hot coil front pinch rolls, 8-second hot coil boxes, 9-second hot coil rear pinch rolls, 10-second flying shears and 11-pinch rolls.
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.
Example 1
Referring to fig. 1, in order to provide a hot rolling system for the line head-off rolling of wire and bar materials, a roller way between an upstream continuous rolling unit and a downstream continuous rolling unit is divided into a first roller way and a second roller way in parallel by sequentially connecting a hot front switch 1 and a hot rear switch 5 between the upstream continuous rolling unit and the downstream continuous rolling unit along the conveying direction of rolled materials.
The first roller way is sequentially provided with a first hot coil front pinch roll 2, a first hot coil box 3 and a first hot coil rear pinch roll 4 along the conveying direction of rolled pieces, and the second roller way is sequentially provided with a second hot coil front pinch roll 7, a second hot coil box 8 and a second hot coil rear pinch roll 9 along the conveying direction of rolled pieces.
Specifically, a first flying shear 6 is arranged between the upstream continuous rolling unit and the hot rolling front switcher 1 to cut the head of the rolled piece before hot rolling, a second flying shear 10 is arranged between the hot rolling rear switcher 5 and the downstream continuous rolling unit to cut the head of the rolled piece after hot rolling, an outlet of the second flying shear 10 is connected with a pinch roll 11, and the cut rolled piece is sent into the downstream rolling unit through the pinch roll 11.
A method for wire rod production line unheading rolling, comprising the steps of:
step 1: the rolled piece rolled by the upstream continuous rolling mill is guided into a first roller way through a hot rolling front switcher 1, is conveyed into a first hot rolling box 3 through a first hot rolling front pinch roller 2, and is coiled into a coil through the first hot rolling box 3;
step 2: after coiling, the first hot coil box 3 reversely uncoils and is guided into a downstream continuous rolling mill set for rolling through the first hot coil rear pinch roll 4 and the hot coil rear switcher 5;
step 3: the next rolled piece rolled by the upstream continuous rolling mill is guided into a second roller way through a hot-rolling front switcher 1, is conveyed into a second hot-rolling box 8 by a second hot-rolling front pinch roller 7, and is coiled into a roll through the second hot-rolling box 8;
step 4: after the completion of the winding, the second hot box 8 is reversely wound, the hot rolled sheet is fed into a downstream continuous rolling unit through a second hot rolled pinch roll 9 and a hot rolled switch 5 for rolling;
step 5: sequentially repeating the steps 1 to 4, and repeating the steps to realize continuous rolling production of the wire rod materials one by one;
specifically, when the hot rolling box is coiled into a coil, the coiling speed of the rolled piece is matched with the outlet speed of the rolled piece of the upstream continuous rolling mill, and when the hot rolling box is uncoiled, the uncoiling speed of the rolled piece is matched with the inlet speed of the rolled piece of the downstream continuous rolling mill, the speed matching method adopts a micro tension control method of wire rods to match, and the hot rolling box can be better matched with the upstream continuous rolling mill and the downstream continuous rolling mill by adopting micro tension to adjust the coiling speed and the uncoiling speed of the rolled piece.
Example 2
According to the production efficiency, the roller ways between the upstream continuous rolling unit and the downstream continuous rolling unit are divided into a first roller way, a second roller way and a third roller way by the hot-rolling front switcher 1 and the hot-rolling rear switcher 5, and a hot-rolling front pinch roll, a hot-rolling box and a hot-rolling rear pinch roll are correspondingly arranged on the three roller ways, and the rest are the same as the 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 (2)
1. A method for wire rod production line head-off rolling, which is characterized by comprising the following steps:
step 1: the method comprises the steps that a hot coil front switcher (1) and a hot coil rear switcher (5) are arranged between an upstream continuous rolling unit and a downstream continuous rolling unit, the roller ways between the upstream continuous rolling unit and the downstream continuous rolling unit are divided into a plurality of parallel roller ways, and a hot coil front pinch roll, a hot coil box and a hot coil rear pinch roll are sequentially arranged on each parallel roller way along the conveying direction of rolled pieces;
step 2: the rolled piece rolled by the upstream continuous rolling unit is led into one idle roller way through a hot rolling front switcher (1), is conveyed into a hot rolling box through a hot rolling front pinch roller, and is coiled into a roll through the hot rolling box;
step 3: after coiling, the hot coil box reversely uncoils and is guided into a downstream continuous rolling unit for rolling through a hot coil rear pinch roll and a hot coil rear switcher (5);
step 4: the next rolled piece rolled by the upstream continuous rolling unit is led into another parallel idle roller way through a hot rolling front switcher (1), and is conveyed into a hot rolling box by a hot rolling front pinch roller and is coiled into a roll through the hot rolling box;
step 5: after coiling, the hot coil box reversely uncoils and is sent into a downstream continuous rolling unit for rolling through a hot coil rear pinch roll and a hot coil rear switcher (5);
step 6: and (3) sequentially repeating the steps (2) to (5), wherein when the hot coil box is coiled into coils, the coiling speed of the rolled piece is matched with the outlet speed of the rolled piece of the upstream continuous rolling mill, and when the hot coil box is uncoiled, the uncoiling speed of the rolled piece is matched with the inlet speed of the rolled piece of the downstream continuous rolling mill, and the steps are repeated to realize continuous rolling production of wire bars.
2. A method for wire rod production line unheading rolling as claimed in claim 1, wherein: two parallel roller tables are arranged between the upstream continuous rolling unit and the downstream continuous rolling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210107135.2A CN114405993B (en) | 2022-01-28 | 2022-01-28 | Method for line bar production line head-removing rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210107135.2A CN114405993B (en) | 2022-01-28 | 2022-01-28 | Method for line bar production line head-removing rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114405993A CN114405993A (en) | 2022-04-29 |
| CN114405993B true CN114405993B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210107135.2A Active CN114405993B (en) | 2022-01-28 | 2022-01-28 | Method for line bar production line head-removing rolling |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980026187A (en) * | 1996-10-08 | 1998-07-15 | 김종진 | Coil box device for continuous rolling with bypass rolling |
| CN1483521A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket |
| CN102115808A (en) * | 2010-11-17 | 2011-07-06 | 莱芜钢铁股份有限公司 | Ferrite region rolling temperature control system |
| CN103157658A (en) * | 2013-04-12 | 2013-06-19 | 湖南华菱涟源钢铁有限公司 | Process of rolling stainless steel coil in conventional hot continuous rolling production line |
| CN106925610A (en) * | 2017-04-27 | 2017-07-07 | 中冶赛迪工程技术股份有限公司 | A kind of wire rod bundling produces collection system and method |
| CN107962071A (en) * | 2017-11-29 | 2018-04-27 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Bar and wire rod rolling process production line and its production method |
| CN110508615A (en) * | 2019-08-30 | 2019-11-29 | 中冶赛迪工程技术股份有限公司 | A kind of high-speed bar mill two-wire rolling mill practice device and method |
| CN110681697A (en) * | 2019-09-20 | 2020-01-14 | 中冶赛迪工程技术股份有限公司 | Long material production line process equipment suitable for direct rolling |
| CN113584404A (en) * | 2021-07-13 | 2021-11-02 | 武汉钢铁有限公司 | Cu-containing non-oriented silicon steel and production method thereof |
| CN216881042U (en) * | 2022-01-28 | 2022-07-05 | 中冶赛迪工程技术股份有限公司 | Hot rolling system for end-off rolling of wire and bar production line |
-
2022
- 2022-01-28 CN CN202210107135.2A patent/CN114405993B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980026187A (en) * | 1996-10-08 | 1998-07-15 | 김종진 | Coil box device for continuous rolling with bypass rolling |
| CN1483521A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket |
| CN102115808A (en) * | 2010-11-17 | 2011-07-06 | 莱芜钢铁股份有限公司 | Ferrite region rolling temperature control system |
| CN103157658A (en) * | 2013-04-12 | 2013-06-19 | 湖南华菱涟源钢铁有限公司 | Process of rolling stainless steel coil in conventional hot continuous rolling production line |
| CN106925610A (en) * | 2017-04-27 | 2017-07-07 | 中冶赛迪工程技术股份有限公司 | A kind of wire rod bundling produces collection system and method |
| CN107962071A (en) * | 2017-11-29 | 2018-04-27 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Bar and wire rod rolling process production line and its production method |
| CN110508615A (en) * | 2019-08-30 | 2019-11-29 | 中冶赛迪工程技术股份有限公司 | A kind of high-speed bar mill two-wire rolling mill practice device and method |
| CN110681697A (en) * | 2019-09-20 | 2020-01-14 | 中冶赛迪工程技术股份有限公司 | Long material production line process equipment suitable for direct rolling |
| CN113584404A (en) * | 2021-07-13 | 2021-11-02 | 武汉钢铁有限公司 | Cu-containing non-oriented silicon steel and production method thereof |
| CN216881042U (en) * | 2022-01-28 | 2022-07-05 | 中冶赛迪工程技术股份有限公司 | Hot rolling system for end-off rolling of wire and bar production line |
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| Publication number | Publication date |
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| CN114405993A (en) | 2022-04-29 |
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