CN216881026U - Production system for controlling shade and sun surfaces of double high-speed bars - Google Patents
Production system for controlling shade and sun surfaces of double high-speed bars Download PDFInfo
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- CN216881026U CN216881026U CN202220188718.8U CN202220188718U CN216881026U CN 216881026 U CN216881026 U CN 216881026U CN 202220188718 U CN202220188718 U CN 202220188718U CN 216881026 U CN216881026 U CN 216881026U
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Abstract
The utility model belongs to the technical field of steel production, and relates to a production system for controlling the male and female surfaces of a double-high-speed bar, which comprises a pre-finish rolling and splitting unit, a finish rolling unit, a high-speed flying shear, a tail clamping brake and a cooling bed which are sequentially arranged along the rolling production direction; the finish rolling unit comprises a first finish rolling unit, a flying shear before finish rolling, a second finish rolling unit and a cooling water tank which are arranged in series along the rolling production direction; the cooling water tanks are arranged behind the pre-finish rolling splitting unit, the first finishing mill group and the second finishing mill group; and a pinch roll used for clamping the rolled piece is arranged behind the cooling water tank. In the utility model, the finish rolling unit adopts a multi-line parallel mode, and each branch is independently controlled without mutual influence. The control parameters of each branch circuit are differentially controlled according to actual conditions, so that the difference of the organization and the mechanical property of each branch circuit product is reduced, and the stability of the organization and the mechanical property of each branch circuit product is improved.
Description
Technical Field
The utility model belongs to the technical field of steel production, and relates to a production system for controlling the shade and sun surfaces of double high-speed bars.
Background
The bars are mainly divided into screw-thread steel bars and super steel bars for buildings, and are widely applied to the industries of buildings, automobiles, engineering machinery, bridges and metal products. As the deformed steel bar with the maximum single-item yield and specific gravity, the yield of 2020 reaches 26639 ten thousand tons, which accounts for 25.3 percent of the crude steel yield in China.
At present, two production modes are mainly adopted for medium and small-sized deformed steel bars: a slitting rolling production mode and a high-speed bar rolling production mode.
1. Cutting and rolling: namely, the rolling technology of longitudinally cutting the rolled piece into two lines or multiple lines by using a roll pass, a slitting wheel in a guide device or other slitting devices in the rolling process. At present, with the progress and maturity of the technology, the final two-segment rolling is developed to the maximum six-segment rolling, and the yield of a single production line can reach 120-180 ten thousand tons/year. Although the segmentation technology can effectively improve the hourly output and the annual output of the rolling line, the method still has the following problems and defects:
(1) the splitting rolling speed is limited, and can only reach 18m/s at most, and most production lines at present only have 14-16 m/s;
(2) due to the influence of multi-line rolling, the cut rolled product cannot realize accurate negative deviation rolling;
(3) the requirement on material type is more strict, deviation is easy to occur in multi-line control, and compared with single-line rolling, the end cropping amount is increased by 0.5%;
(4) after slitting and rolling, burrs and edge defects are easy to appear on a product, folding or crack defects are easy to cause, and the yield is low;
(5) twisting is needed after cutting, a twisting guide is needed, the twisting rolling is easy to scratch, the surface quality of a product is influenced, the broadening in the rolling process is influenced, and the size precision of a final product is further influenced;
(6) the splitting rolling process is easy to break down, the labor intensity of workers is high, and the utilization rate of the rolling mill is reduced.
2. Rolling the high-speed bar: namely, after rolling by a roll collar rolling mill in the rolling process, the steel plate enters a rotating hub through high-speed flying shear multiple-length shearing, and enters a cooling bed after being forcedly braked by a pinch roll. With the mature and advanced technology of high-speed bars, the high-speed steel feeding speed reaches 50m/s, and the output of a single high-speed bar production line can reach 70-90 ten thousand tons/year.
Except for a single high-speed bar production line, a double high-speed bar production line is more and more favored by manufacturers, and the principle of the double high-speed bar production line is that a pre-finishing mill set performs splitting rolling, then split rolled pieces are respectively rolled by a top-crossing 45-degree finishing mill set, and then are respectively fed by a high-speed feeding system and enter a cooling bed for cooling. Because two finished products can be rolled simultaneously, the annual output of the double high-speed bars can reach 140-160 ten thousand tons/year, and the two finished products are respectively rolled by the roll collars of the finishing mill group, the finished products have high precision and good surface quality, and the temperature control can be realized through the water cooling sections before and after finishing rolling, thereby reducing the alloy cost. However, the following problems and disadvantages still exist in the current dual high-speed bar:
(1) because the splitting position is in the middle of the rolled piece, the rolled piece has a 'shadow and sun surface' after splitting, namely the rolled piece has a phenomenon of large difference in temperature at different positions due to the process, the shadow surface refers to a surface with low temperature, the sun surface refers to a surface with high temperature, and the temperature of the rolled piece is easy to fluctuate, so that the water cooling parameter fluctuates;
(2) the rolled piece is easy to twist after being split, and the rolled piece has a 'rotation' phenomenon in the conveying process, so that the rolling line fault is easy to cause;
(3) the thermometers arranged on the two branches are positioned on one side of the rolled piece, and the temperature deviation of the rolled piece is large due to different measuring positions;
(4) because of the difference of the temperature and the size of the two branches, the temperature rise and the temperature control difference are caused, and further the difference of the organization and the mechanical property of the two branches is caused.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a production system for controlling the male and female surfaces of a dual-high-speed bar, which can greatly improve the structural uniformity and stability of the product, reduce the difference in mechanical properties, improve the production stability, improve the utilization rate of a rolling mill, and improve the economic benefit.
In order to achieve the purpose, the utility model provides the following technical scheme:
a production system for controlling the shade and the sun surfaces of double high-speed bars comprises a pre-finish rolling and splitting unit, a finish rolling unit, a high-speed flying shear, a tail clamping brake and a cooling bed which are sequentially arranged along the rolling production direction;
the finish rolling unit comprises a first finish rolling unit, a flying shear before finish rolling, a second finish rolling unit and a cooling water tank which are arranged in series along the rolling production direction; the cooling water tanks are arranged behind the pre-finish rolling splitting unit, the first finishing mill group and the second finishing mill group; and a pinch roll used for clamping the rolled piece is arranged behind the cooling water tank.
Furthermore, a diameter measuring instrument and a temperature measuring instrument are arranged in front of the first finishing mill group and the flying shear before finishing.
Further, the thermodetector is arranged on two sides of the rolled piece.
Furthermore, a plurality of cooling water tanks which are arranged in series are arranged behind the first finishing mill group and the second finishing mill group.
Furthermore, a diameter measuring instrument is arranged in front of the high-speed flying shear, and a temperature measuring instrument is arranged behind the high-speed flying shear.
Furthermore, at least two groups of finish rolling units are arranged between the pre-finish rolling segmentation unit and the high-speed flying shear side by side.
Further, the pre-finish rolling segmentation unit comprises at least 4 horizontal rolling mills which are arranged in series along the rolling production direction.
The utility model has the beneficial effects that:
1) the finish rolling unit adopts a multi-line parallel mode, and each branch is independently controlled without mutual influence. The control parameters of each branch circuit are differentially controlled according to actual conditions, so that the difference of the organization and the mechanical property of each branch circuit product is reduced, and the stability of the organization and the mechanical property of each branch circuit product is improved.
2) The diameter measuring instrument which is independently configured can effectively reduce the temperature rise difference caused by the size deviation of the rolled piece;
3) the temperature measuring instruments are independently arranged and are respectively positioned at two sides of the rolled piece, so that the temperature deviation of the rolled piece caused by different measuring positions is effectively reduced, and the phenomenon of 'sunny and shady surfaces' is further reduced.
4) A pinch roll is arranged behind the cooling water tank, so that the phenomenon of rotation of the rolled piece in the conveying process is avoided, the temperature measurement positions of the rolled piece in the front and back conveying processes are ensured to be the same, the process parameters are accurately controlled, and the control precision is improved;
5) the system has wide application range and is suitable for producing bars with the specification range of phi 6.0 mm-phi 22.0 mm.
Additional advantages, objects, and features of the utility model 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 utility model. The objectives and other advantages of the utility model 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 utility model, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a double high-speed bar production line arrangement employed in the present invention;
reference numerals: 1-pre-finish rolling and splitting unit; 2-cooling a water tank before finish rolling; 3-pinch roll behind the water tank; 4-a front diameter gauge and a temperature measuring instrument of the first finishing mill group; 5-a first finishing mill group; 6-cooling water tank behind the first finishing mill group; 7-pinch roll between the water tanks; 8-a front diameter gauge and a temperature measuring instrument of a second finishing mill group; 9-flying shears before finish rolling; 10-a second finishing mill group; 11-a second finishing mill group rear cooling water tank; 12-pinch roll between water tanks; 13-diameter measuring instrument; 14-high speed flying shears; 15-a temperature measuring instrument; 16-tail-clamping brake; 17-cooling bed.
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 utility model 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 utility model 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 utility model 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.
Referring to fig. 1, a production system for controlling the male and female surfaces of a double-high-speed bar comprises a pre-finish rolling and splitting unit, a finish rolling unit, a high-speed flying shear 14, a tail clamping brake 16 and a cooling bed 17 which are sequentially arranged along the rolling production direction; the finish rolling unit comprises a first finish rolling unit 5, a flying shear 9 before finish rolling, a second finish rolling unit 10 and a cooling water tank which are arranged in series along the rolling production direction; cooling water tanks are arranged behind the pre-finish rolling splitting unit 1, the first finishing mill group 5 and the second finishing mill group 10; and a pinch roll used for clamping the rolled piece is arranged behind the cooling water tank.
The first finishing mill group 5 and the flying shear 9 before finishing are respectively provided with a diameter measuring instrument 13 and a temperature measuring instrument 15. A diameter measuring instrument 13 is also arranged in front of the high-speed flying shear 14, and a temperature measuring instrument 15 is also arranged behind the high-speed flying shear 14. The thermometers 15 are installed on both sides of the rolled piece.
In this example, there are two sets of finishing units forming A, B twin lines of the same equipment configuration, arranged side by side between the pre-finishing splitting unit and the high speed flying shear 14. A plurality of cooling water tanks which are arranged in series and are controlled independently are arranged behind the first finishing mill group 5 and the second finishing mill group 10. The pre-finishing splitting unit comprises at least 4 horizontal rolling mills which are arranged in series along the rolling production direction.
Taking line A as an example, according to the rolling production direction, a pre-finishing rolling splitting unit 1, a pre-finishing rolling cooling water tank 2, a water tank rear pinch roll 3, a first finishing rolling unit front diameter measuring instrument and a temperature measuring instrument 4, a first finishing rolling unit 5, a first finishing rolling unit rear cooling water tank 6, an inter-water tank pinch roll 7, a second finishing rolling unit front diameter measuring instrument and a temperature measuring instrument 8, a pre-finishing rolling flying shear 9, a second finishing rolling unit 10, a second finishing rolling unit rear cooling water tank 11, an inter-water tank pinch roll 12, a diameter measuring instrument 13, a high-speed flying shear 14, a temperature measuring instrument 15, a tail clamping brake 16 and a cooling bed 17 are arranged in sequence.
The specific process for producing the 12mm deformed steel bar by adopting the production system in the embodiment is as follows:
(1) slitting and rolling by a pre-finishing mill set: pre-splitting and splitting rolling are carried out on a rolled piece rolled by a vertical box hole of a horizontal and vertical alternate rolling mill of a middle rolling mill group by adopting a 2-frame horizontal rolling mill, and the equivalent area of the rolled piece at the outlet of the vertical box hole is 1210mm2The average elongation coefficient of pre-segmentation and segmentation rolling passes is 1.11, and the area of a rolled piece after segmentation is 488mm2Then rolling the rolled piece by two horizontal rolling mills, wherein the pass system is an oval-round pass system during rolling, guide devices are arranged at the front and the rear of each rolling mill, the average elongation coefficient of the two-pass rolling is 1.32, the diameter of the rolled piece after rolling is 18.7mm, the running speed of the rolled piece is 17.5m/s, and the rolling temperature of the 4-pass pre-finishing mill group splitting rolling is 900-;
(2) water cooling temperature control before finish rolling: and (2) carrying out temperature control water cooling before finish rolling on the rolled piece subjected to splitting rolling in the step (1), enabling the rolled piece to enter a cooling water tank 2 before finish rolling after passing through a splitting set, carrying out rapid water cooling, wherein water blocking is prevented during water cooling, a nozzle of the cooling water tank is opened after a head part of the rolled piece goes out of a water tank, and a pinch roll arranged at an outlet of the water tank is used for preventing the phenomenon of rotation caused by irregular shape of the rolled piece after the rolled piece is split rolled, and a recovery section is arranged between two cooling water tanks to prevent the surface temperature of the rolled piece from being too low. The line A water system and the line B are independently controlled and do not influence each other, the rolled piece is subjected to temperature measurement and diameter measurement through a temperature measuring instrument and a diameter measuring instrument 4 in front of a first finishing mill group, the temperature of the rolled piece of the line A is independently controlled, and the temperature of the rolled piece entering an inlet of the first finishing mill group 5 is 830-900 ℃ after temperature control and water cooling;
(3) rolling by a first finishing mill group: the rolled piece enters a first finishing mill group 5 to be rolled for 2 times, a pass system is an oval-round pass system during rolling, guide devices are arranged at the front and the rear of each rolling mill, the deformation compression ratio of each pass is controlled to be 1.28 during rolling, the deformation temperature is 830-950 ℃, the equivalent diameter of the rolled piece after rolling is 14.5mm, and the running speed of the rolled piece is 28.6 m/s;
(4) performing water cooling temperature control after first finish rolling: carrying out temperature control water cooling on the rolled piece rolled by the first finishing mill group 5 in the step (3), rapidly cooling the rolled piece by a cooling water tank after the rolled piece enters the first finishing mill group 5, carrying out temperature and diameter measurement on the rolled piece by a front diameter measuring instrument and a temperature measuring instrument 8 of a second finishing mill group, and controlling the temperature and water cooling of the rolled piece, wherein the temperature of the rolled piece entering the inlet of the second finishing mill group 10 is 750-850 ℃;
(5) and (3) finish rolling by a second finishing mill group: rolling the rolled piece by a second finishing mill group 10 for 2 passes, wherein a pass system is an oval-round pass system during rolling, guide devices are arranged at the front and the rear of each rolling mill, the deformation compression ratio of each pass is controlled to be 1.25 in the rolling process, the deformation temperature is 750-850 ℃, the equivalent diameter of the rolled piece after rolling is 12.0mm, and the running speed of the rolled piece is 45 m/s;
(6) and (3) controlling the temperature of the second finishing mill group by water cooling: the rolled piece enters a cooling water tank 11 of a second finishing mill group to be controlled to be cooled by water, in the water cooling process, in order to prevent the water blocking phenomenon, a nozzle of the water tank is opened after the head of the rolled piece goes out of the water tank, a pinch roll is arranged at each outlet of the water tank to prevent the rolled piece from rotating, a return section is arranged between the water tank and the water tank, the surface cooling temperature of the rolled piece is higher than the martensite transformation point, the surface temperature of the rolled piece is too low, a line A water system and a line B are independently controlled and do not influence each other, the rolled piece passes through a temperature measurer 15 and a diameter measurer 13 after passing through the second finishing mill group 10 to realize the independent temperature control of the line A rolled piece, and after temperature control and water cooling, the temperature of a cooling bed 17 on the double-line rolled piece is 800-920 ℃;
(7) shearing by high-speed flying shears and high-speed steel feeding: the rolled piece is subjected to temperature control and water cooling after passing through the second finishing mill group 10, then is sheared by 14-time length of high-speed flying shears, and the rolled piece sequentially enters a double-layer channel of the double-channel guide groove; controlling the speed and distance of a cooling bed 17 on the bar material through a tail clamping brake 16 to finish the steel feeding;
(8) cooling and collecting and bundling by a cooling bed: the high-speed bar material is cooled in a cooling bed 17, and collected after cold shearing, fixed length shearing, counting, bundling, aligning and weighing.
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 (7)
1. The utility model provides a production system of two high-speed rod yin yang sides of control which characterized in that: the device comprises a pre-finish rolling and splitting unit, a finish rolling unit, a high-speed flying shear, a tail clamping brake and a cooling bed which are sequentially arranged along the rolling production direction;
the finish rolling unit comprises a first finish rolling unit, a flying shear before finish rolling, a second finish rolling unit and a cooling water tank which are arranged in series along the rolling production direction; the cooling water tanks are arranged behind the pre-finish rolling splitting unit, the first finishing mill group and the second finishing mill group; and a pinch roll used for clamping the rolled piece is arranged behind the cooling water tank.
2. The production system for controlling the male and female sides of a double-high-speed bar material as claimed in claim 1, wherein: and a diameter measuring instrument and a temperature measuring instrument are arranged in front of the first finishing mill group and the flying shear before finishing.
3. The production system for controlling the male and female sides of a double-high-speed bar material as claimed in claim 2, wherein: the thermodetector is arranged on two sides of the rolled piece.
4. The production system for controlling the male and female sides of a double-high-speed bar material as claimed in claim 2, wherein: and a plurality of cooling water tanks which are arranged in series are arranged behind the first finishing mill group and the second finishing mill group.
5. The production system for controlling the male and female sides of a double-high-speed bar material as claimed in claim 1, wherein: and a diameter measuring instrument is arranged in front of the high-speed flying shear, and a temperature measuring instrument is arranged behind the high-speed flying shear.
6. The production system for controlling the male and female sides of a double-high-speed bar material as claimed in claim 1, wherein: and at least two groups of finish rolling units are arranged between the pre-finish rolling segmentation unit and the high-speed flying shear side by side.
7. The production system for controlling the male and female sides of a double-high-speed bar material as claimed in claim 1, wherein: the pre-finish rolling and splitting unit comprises at least 4 horizontal rolling mills which are arranged in series along the rolling production direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220188718.8U CN216881026U (en) | 2022-01-24 | 2022-01-24 | Production system for controlling shade and sun surfaces of double high-speed bars |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220188718.8U CN216881026U (en) | 2022-01-24 | 2022-01-24 | Production system for controlling shade and sun surfaces of double high-speed bars |
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| CN216881026U true CN216881026U (en) | 2022-07-05 |
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| CN202220188718.8U Active CN216881026U (en) | 2022-01-24 | 2022-01-24 | Production system for controlling shade and sun surfaces of double high-speed bars |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405992A (en) * | 2022-01-24 | 2022-04-29 | 中冶赛迪工程技术股份有限公司 | Production method and system for controlling shade and sun surfaces of double high-speed bars |
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2022
- 2022-01-24 CN CN202220188718.8U patent/CN216881026U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114405992A (en) * | 2022-01-24 | 2022-04-29 | 中冶赛迪工程技术股份有限公司 | Production method and system for controlling shade and sun surfaces of double high-speed bars |
| CN114405992B (en) * | 2022-01-24 | 2023-11-28 | 中冶赛迪工程技术股份有限公司 | Production method and system for controlling double high-speed bar sunny and shady surfaces |
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