CN114405993A - Method for head-off rolling of wire and bar production line - Google Patents
Method for head-off rolling of wire and bar production line Download PDFInfo
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- CN114405993A CN114405993A CN202210107135.2A CN202210107135A CN114405993A CN 114405993 A CN114405993 A CN 114405993A CN 202210107135 A CN202210107135 A CN 202210107135A CN 114405993 A CN114405993 A CN 114405993A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 97
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005098 hot rolling Methods 0.000 claims abstract description 47
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 26
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- B21B1/16—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
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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
-
- 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 head-off rolling method for a wire and bar production line, belonging to the technical field of metallurgy. The method comprises the following steps that rolled pieces rolled by an upstream continuous rolling unit are guided into an idle roller way through a switch before hot rolling for hot rolling, the rolled pieces are reversely uncoiled after the hot rolling is finished, the rolled pieces are conveyed into a downstream continuous rolling machine through the switch after the hot rolling, the next rolled piece is guided into another parallel idle roller way through the switch before the hot rolling, the rolled pieces are reversely uncoiled after the hot rolling is finished, the rolled pieces are conveyed into the downstream continuous rolling machine through the switch after the hot rolling, and the continuous rolling production of the wire rods can be realized by repeating the steps. The invention enables rolled pieces to obtain uniform temperature and heat preservation in a hot coil box when the coil and bar production line rolls off the head, reduces temperature drop, ensures the uniformity of the head and tail temperature of the rolled pieces by enabling the head and the tail of the rolled pieces after uncoiling to enter a downstream continuous rolling unit for rolling in a sequence opposite to that of the upstream continuous rolling unit, thereby improving the uniformity of the strip passing quality of final products and improving the overall working efficiency of the system through a plurality of parallel roller ways.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and relates to a method for head-off rolling of a wire and bar production line.
Background
For a wire and bar continuous rolling production line, particularly an excellent special steel wire and bar continuous rolling production line, or other types of wire and bar production lines which do not form continuous rolling between a roughing mill group and a medium rolling mill group, the method generally adopts end-off rolling between the roughing mill group and the medium rolling mill group, namely, a roller way is arranged between the roughing mill group and the medium rolling mill group, the length of the roller way is greater than that of a rolled piece rolled by the roughing mill group, so that continuous rolling is not formed between the roughing mill group and the medium rolling mill group, and the roughing mill group and the medium rolling mill group are generally respectively called an upstream continuous rolling mill group and a downstream continuous rolling mill group.
The main disadvantages of the head-off rolling method adopting the roller way are as follows: the sequence of the head and the tail of the rolled piece entering the downstream continuous rolling unit for rolling is the same as that of the upstream continuous rolling unit, so that the uniformity of the head and the tail temperature of the rolled piece is difficult to ensure, and the uniformity of the product quality and the whole strip is not favorable; the temperature drop loss of the rolled piece at the head-off roller way section is large, and energy is not saved; the length of the workshop is longer, and the investment of factory buildings, civil engineering and the like is increased.
At present, a system used between an upstream continuous rolling unit and a downstream continuous rolling unit is urgently needed to ensure the uniformity of the temperature of the head and the tail of a rolled piece, reduce the temperature drop of the rolled piece and have no influence on the processing efficiency of the rolled piece.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for the head-end rolling of a wire rod production line, which improves the head-end temperature difference of rolled pieces and reduces the temperature drop of the rolled pieces in a head-end roller section.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for the end-off rolling of a wire and bar production line comprises the following steps:
step 1: a hot coil front point switch and a hot coil rear point switch are arranged between an upstream continuous rolling unit and a downstream continuous rolling unit to divide roller ways between the upstream continuous rolling unit and the downstream continuous rolling unit 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 a rolled piece;
step 2: the rolled piece rolled by the upstream continuous rolling unit is guided into one of the idle roller ways through a hot rolling front point switch, is conveyed into a hot rolling box by a hot rolling front pinch roll, and is coiled into a coil through the hot rolling box;
and step 3: after coiling is finished, the hot coil box reversely uncoils, and the hot coil box is guided into a downstream continuous rolling mill set for rolling through a hot coil back pinch roll and a hot coil back switch;
and 4, step 4: leading a next rolled piece rolled by the upstream continuous rolling unit into another parallel idle roller way through a hot pre-rolling point switch, conveying the rolled piece into a hot rolling box through a hot pre-rolling pinch roller, and coiling the rolled piece into a coil through the hot rolling box;
and 5: after coiling is finished, the hot coil box reversely uncoils, and the hot coil box is conveyed to a downstream continuous rolling mill set for rolling through a hot coil back pinch roll and a hot coil back switch;
step 6: and (5) repeating the steps 2 to 5 in sequence, and repeating the steps to realize continuous rolling production of the wire rods one by one.
Furthermore, two parallel roller ways are arranged between the upstream continuous rolling unit and the downstream continuous rolling unit.
Further, when the hot coil 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, 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.
The invention has the beneficial effects that:
1. the invention ensures that rolled pieces in the coil box are uniform in temperature and kept warm when the coil bar production line rolls at the head end, reduces the temperature drop, ensures the uniformity of the head and tail temperature of the rolled pieces by the opposite sequence of the head and tail of the rolled pieces entering the downstream continuous rolling unit to be rolled as compared with the upstream continuous rolling unit, and improves the strip passing uniformity of the final product quality.
2. The invention adopts the hot coiling box to coil the wire rod, shortens the length of the production line, greatly reduces the investment of factory buildings, civil engineering and the like, and improves the working efficiency of the rolled piece processing through a plurality of parallel roller ways.
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 objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1-a hot coil front switch, 2-a first hot coil front pinch roll, 3-a first hot coil box, 4-a first hot coil rear pinch roll, 5-a hot coil rear switch, 6-a first flying shear, 7-a second hot coil front pinch roll, 8-a second hot coil box, 9-a second hot coil rear pinch roll, 10-a second flying shear and 11-a pinch roll.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood 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 numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Example 1
Referring to fig. 1, in order to provide a hot rolling system for the end-off rolling of a wire rod production line, a roller way between an upstream continuous rolling mill train and a downstream continuous rolling mill train is divided into a first roller way and a second roller way which are parallel to each other by sequentially connecting a hot rolling front switch 1 and a hot rolling rear switch 5 between the upstream continuous rolling mill train and the downstream continuous rolling mill train in a rolled piece conveying direction.
The hot rolling device is characterized in that a first hot rolling front pinch roll 2, a first hot rolling box 3 and a first hot rolling rear pinch roll 4 are sequentially arranged on the first roller way along the conveying direction of a rolled piece, and a second hot rolling front pinch roll 7, a second hot rolling box 8 and a second hot rolling rear pinch roll 9 are sequentially arranged on the second roller way along the conveying direction of the rolled piece.
Specifically, a first flying shear 6 is arranged between the upstream continuous rolling mill set and the switch 1 before hot rolling to cut the head of the rolled piece before hot rolling, a second flying shear 10 is arranged between the switch 5 after hot rolling and the downstream continuous rolling mill set 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 rolled piece after head cutting is sent to the downstream rolling mill set through the pinch roll 11.
A method for the end-off rolling of a wire and bar production line comprises the following steps:
step 1: rolled pieces rolled by an upstream continuous rolling unit are guided into a first roller way through a hot rolling front switch 1, are conveyed into a first hot rolling box 3 through a first hot rolling front pinch roll 2, and are rolled into coils through the first hot rolling box 3;
step 2: after coiling is finished, the first hot coil box 3 reversely uncoils and guides the hot coil to a downstream continuous rolling mill group for rolling through a first hot coil rear pinch roll 4 and a hot coil rear point switch 5;
and step 3: the next rolled piece rolled by the upstream continuous rolling unit is guided into a second roller way through a hot pre-rolling switch 1, is conveyed into a second hot rolling box 8 through a second hot pre-rolling pinch roll 7, and is coiled into a coil through the second hot rolling box 8;
and 4, step 4: after coiling is finished, the second hot coil box 8 reversely uncoils, and sends the hot coil to a downstream continuous rolling mill group for rolling through a second hot coil rear pinch roll 9 and a hot coil rear point switch 5;
and 5: the steps 1 to 4 are repeated in sequence, and the rolling production of the wire rods one by one is realized;
specifically, when the hot coil box is coiled, the coiling speed of the rolled piece is matched with the outlet speed of the rolled piece of the upstream continuous rolling mill, 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, the speed matching method adopts a micro-tension control method of a wire rod material for matching, and the coiling speed and the uncoiling speed of the rolled piece are adjusted by adopting micro-tension, so that the hot coil box can be better matched with the upstream continuous rolling mill and the downstream continuous rolling mill.
Example 2
According to the requirement of 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 switch 1 and the hot rolling rear switch 5, the hot rolling front pinch roll, the hot rolling box and the hot rolling rear pinch roll are correspondingly arranged on the three roller ways, and the rest is the same as that in the embodiment 1.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (4)
1. A method for the end-off rolling of a wire and bar production line is characterized by comprising the following steps:
step 1: a hot rolling front switch (1) and a hot rolling rear switch (5) are arranged between an upstream continuous rolling unit and a downstream continuous rolling unit to divide roller ways between the upstream continuous rolling unit and the downstream continuous rolling unit 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 a rolled piece;
step 2: rolled pieces rolled by an upstream continuous rolling unit are guided into one of idle roller ways through a hot pre-rolling switch (1), are conveyed into a hot rolling box by a hot pre-rolling pinch roll, and are coiled into coils through the hot rolling box;
and step 3: after coiling is finished, the hot coil box reversely uncoils, and the hot coil box is guided into a downstream continuous rolling mill set for rolling through a hot coil back pinch roll and a hot coil back switch (5);
and 4, step 4: leading a next rolled piece rolled by an upstream continuous rolling unit into another parallel idle roller way through a hot pre-rolling point switch (1), conveying the rolled piece into a hot rolling box through a hot pre-rolling pinch roll, and coiling the rolled piece into a coil through the hot rolling box;
and 5: after coiling is finished, the hot coil box reversely uncoils, and the hot coil box is conveyed to a downstream continuous rolling unit for rolling through a hot coil back pinch roll and a hot coil back switch (5);
step 6: and (5) repeating the steps 2 to 5 in sequence, and repeating the steps to realize continuous rolling production of the wire rods one by one.
2. A method for bar production line unheading rolling according to claim 1, characterised in that: two parallel roller ways are arranged between the upstream continuous rolling unit and the downstream continuous rolling unit.
3. A method for bar production line unheading rolling according to claim 1, characterised in that: when the hot coil box coils, the coiling speed of the rolled piece is matched with the outlet speed of the rolled piece of the upstream continuous rolling mill.
4. A method for bar production line unheading rolling according to claim 1, characterised in that: 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.
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 |
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| Publication Number | Publication Date |
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| CN114405993A true CN114405993A (en) | 2022-04-29 |
| CN114405993B CN114405993B (en) | 2024-04-02 |
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| 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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| CN114405993B (en) | 2024-04-02 |
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