CN111589858A - Double-high-rod controlled cold rolling system - Google Patents
Double-high-rod controlled cold rolling system Download PDFInfo
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- CN111589858A CN111589858A CN202010568417.3A CN202010568417A CN111589858A CN 111589858 A CN111589858 A CN 111589858A CN 202010568417 A CN202010568417 A CN 202010568417A CN 111589858 A CN111589858 A CN 111589858A
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- rolling
- temperature control
- finishing mill
- temperature
- cold rolling
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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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/12—Length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a double-high-bar cold rolling control system, which is used for solving the problems of low temperature control precision and poor adaptability of a double-high-bar rolling line in the prior art. To achieve the above and other related objects, the present invention provides a dual high bar cold rolling system, comprising: the rolling mill set is used for high-speed regional rolling, at least two rolling mill sets correspond to each rolling line, and rolled pieces sequentially pass through the two rolling mill sets; and the temperature control equipment is arranged at the position before rolling and the position after rolling of each finishing mill group and is used for cooling the rolled piece. Through setting up two at least finishing mill groups in rolling direction for the rod can obtain higher rolling precision, simultaneously through all setting up the design of temperature control equipment around each finishing mill group, makes the rolled piece in the finish rolling process, realizes isothermal low temperature rolling, has reduced the rolling process temperature rise of rolled piece, makes the metal property of rod promote.
Description
Technical Field
The invention relates to the field of design of steel rolling controlled cooling process flows, in particular to a double-high-rod controlled cold rolling system.
Background
At present, in the double high-bar project which is built up to be put into production domestically or internationally, in order to achieve the purpose of temperature control rolling, 6 stands are adopted for continuous rolling in a finishing mill group, and large surrounding discs (steel channels are arranged on two sides of the finishing mill group) are arranged to achieve the purposes of prolonging a rolling line and reducing the temperature for finish rolling.
Secondly, the rolling speed of the double high rods is high, the resistance and the passing performance of a rolled piece are reduced in a large circular arc area of the large enclosure disc in the prior art, the abrasion of a guide groove is accelerated, steel piling accidents are easy to generate, the production operation rate is reduced, and the treatment of scrap steel in the large enclosure disc is also very difficult.
The rolling system in the above manner has low temperature control precision, and the arrangement of the temperature control equipment is not suitable for isothermal low-temperature production.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a dual high-bar cold rolling system, which is used for solving the problems that the dual high-bar rolling line in the prior art has low temperature control precision and is difficult to realize isothermal low-temperature rolling.
To achieve the above and other related objects, the present invention provides a dual high bar cold rolling system, comprising:
the rolling mill set is used for rolling bars, at least two rolling mill sets correspond to each rolling line, and rolled pieces sequentially pass through the two rolling mill sets;
the temperature control equipment, every the position all is equipped with position after rolling before the rolling of finishing mill group temperature control equipment, temperature control equipment is used for right the rod cools down.
Optionally, the rolling mill further comprises a splitting unit, wherein the splitting unit is used for splitting the rolled piece in the length direction to form two rolling branch lines, and at least two groups of finishing mill groups are correspondingly arranged on the two rolling branch lines respectively.
Optionally, a first temperature control system is arranged between the slitting unit and the finishing mill unit, a second temperature control system is arranged between two adjacent finishing mill units, and the first temperature control system and the second temperature control system are respectively located behind the two temperature control devices.
Optionally, the length of the first temperature control system and the length of the second temperature control system meet the requirements of isothermal low-temperature rolling.
Optionally, the length of the first temperature control system is 85-90m, and the length of the second temperature control system is 90-95 m.
Optionally, each rolling branch is a straight line, a broken line or a curve, and an inner angle of the broken line and an inner angle of the curve are between 150 degrees and 180 degrees.
Optionally, temperature control equipment includes water-cooling mechanism and samming mechanism, temperature sensor and controller, the water-cooling mechanism with control mathematical model electric connection, temperature sensor is used for gathering the rolled piece of temperature control equipment position or the surface temperature of the rolled piece before temperature control equipment.
Optionally, the water spraying opening degree of the water spraying mechanism is adjustable.
Optionally, the roll gap of each frame in the finishing mill group is adjustable.
Optionally, the finishing mill group adopts an oval-round pass route.
As described above, the dual high-bar cold rolling control system of the present invention has at least the following beneficial effects:
through setting up two at least finishing mill groups in rolling direction for the rolled piece can obtain higher rolling precision, simultaneously through all setting up the design of temperature control equipment around each finishing mill group, makes when the finish rolling, better to the controllability of temperature, and the precision is higher, has reduced the inside and outside difference in temperature of rod, makes the metal property of rod promote.
Drawings
Fig. 1 is a schematic diagram of a double high-rod rolling system with a large-tray structure adopted in the prior art.
Fig. 2 is a schematic diagram of a dual high bar controlled cold rolling system of the present invention.
Element number description: the device comprises a finishing mill group 1, a temperature control device 2, a first temperature control system 3 and a second temperature control system 4.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1-2. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions of the present disclosure, so as to be understood and read by those skilled in the art, and therefore, the present disclosure is not limited to the conditions of the present disclosure, and any modifications of the structures, the changes of the ratios, or the adjustments of the sizes, should fall within the scope of the present disclosure without affecting the functions and the achievable purposes of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.
As shown in fig. 1, the existing production line for rolling double high bars adopts the structure shown in fig. 1, after the double high bars are split, two branch lines of the double high bars form a large loop and then continue to be rolled forward to form a finished product, and because the large enclosure structure enables the bars to be rolled forward, the bars are easy to generate large resistance to rolling equipment, so that the service life of a rolling stand is shortened, meanwhile, the existing structure finishing mill group of the large enclosure only adopts one group, so that the temperature control precision is not high, the difference between the temperature reduction and the temperature rise of rolled pieces is large, and the metal performance of the bars is influenced.
Referring to fig. 2, the present invention provides an embodiment of a dual high-bar controlled cold rolling system, comprising: the rolling mill comprises a finishing mill group 1 and a temperature control device 2, wherein the finishing mill group 1 is used for rolling bars, at least two finishing mill groups 1 correspond to each rolling line, and rolled pieces sequentially pass through the two finishing mill groups 1; and the pre-rolling position and the post-rolling position of each finishing mill group 1 are respectively provided with the temperature control equipment 2, and the temperature control equipment 2 is used for cooling and temperature equalization of the rolled piece. As a relatively complete rolling system, the rolling system may further include a roughing mill group, a rolling mill group, and a pre-finishing mill group, where the pre-finishing mill group may further include a splitting mill group mentioned in the following embodiments, optionally, the splitting mill group is configured to split the rolled piece into two rolling branch lines along the length direction, and at least two finishing mill groups 1 are respectively and correspondingly disposed on each of the two rolling branch lines. The rest is not the focus of the present application and will not be described more than here. Through setting up two at least finishing mill groups 1 in rolling direction for the rolled piece can obtain higher rolling precision, simultaneously through all setting up the design of temperature control equipment around each finishing mill group 1, makes when the finish rolling, better to the controllability of temperature, and the precision is higher, realizes isothermal low temperature rolling, makes the metal property of rod promote.
Referring to fig. 2, in this embodiment, there are two finishing mill groups 1 on two branch lines, a first temperature control system 3 is disposed between the slitting mill group and the finishing mill group 1, a second temperature control system 4 is disposed between two adjacent finishing mill groups 1, and the first temperature control system 3 and the second temperature control system 4 are respectively located behind the two temperature control devices 2. Make the great rolling situation of original temperature variation become present stage by stage and cool down gradually and rolling, the temperature controllability is better, cool off through temperature control equipment 2 before the first finish rolling, the rolled piece surface temperature is lower this moment, the rolled piece internal temperature is higher, there is the difference in temperature, then begin the finish rolling for the first time, first finish rolling is after, the rolled piece returns the temperature gradually on first temperature control system 3, the inside and outside temperature of rolled piece approaches gradually, then cooled by temperature control equipment 2 again before getting into the second finish rolling, then begin the second finish rolling, it cools off through temperature control equipment 2 again after the finish rolling. Optionally, the length of the first temperature control system 3 is greater than that of the second temperature control systemThe length of the temperature system 4. Optionally, the length of the first temperature control system 3 is 85-90m, and the length of the second temperature control system 4 is 90-95 m. Specific examples thereof include: the finishing rolling I unit adopts 4 stands of single-transmission cantilever 285 rolling mills which are horizontally and vertically alternated, has enough low-temperature rolling capacity and can ensure that the rolled piece at the temperature of 830 ℃ is rolled smoothly. After rolling by the finishing I set, the temperature of the rolled piece is rapidly increased and can reach 900 ℃ at most. The rolled piece which is rolled and heated by the finishing rolling I set is cooled by 3 sets of cooling control equipment after finishing rolling I, and is replied by a steel passing guide groove with the length of about 45m, and the rolled piece can enter a finishing rolling II set for rolling by controlling the temperature to be about 830 ℃. The finish rolling II unit adopts 4 brand-new generation phi 250 superheavy top-crossed 45-degree cantilever mills, is driven by a module, uses a tungsten carbide roll collar and has the lowest low-temperature rolling capability of 780 ℃. After the rolled piece is rolled at high speed by the unit, the temperature of the rolled piece is raised to 860 ℃, the rolled piece enters 3 sets of cooling control equipment after entering the finishing mill unit 1II, and after cooling and returning, the temperature of a cooling bed on the rolled piece can be controlled according to the process requirement, so that the rolling unit is suitable for rolling
The temperature requirement of the specification.
Referring to fig. 2, in the present embodiment, each rolling branch is a straight line, a polygonal line or a curve, and an inner angle of the polygonal line and an inner angle of the curve are between 150 degrees and 180 degrees. The rod is smoother in the rolling process through the limitation of the rolling motion track of the rolling branch line, the loss of the traditional large surrounding disc structure to the rack is avoided, and the service life of the rack is longer.
Referring to fig. 2, in this embodiment, the temperature control device 2 includes a water cooling mechanism, a temperature equalizing mechanism, a temperature sensor and a controller, the water spraying mechanism is electrically connected to the control mathematical model, the temperature sensor is electrically connected to the control mathematical model, and the temperature sensor is configured to collect a surface temperature of a rolled piece at a position of the temperature control device 2 or a rolled piece before the temperature control device 2. Optionally, the water spraying opening degree of the water spraying mechanism is adjustable. The temperature sensor is arranged, so that the temperature acquisition of a rolled piece can be realized, the water spraying amount is determined according to the temperature condition, the water spraying amount and the water spraying time are different, and the cooling effect on the rolled piece is different, so that the temperature control in a wider range is realized, particularly for bars with different specifications, the specifications are different, and the temperature difference between the inside and the outside of the rolled piece is different; the different specifications lead to the influence of the cooling effect, the adjustable water spraying mechanism can be controlled by the opening of the electromagnetic valve, the electromagnetic valve is electrically connected with the controller,
referring to fig. 2, in the present embodiment, the roll gap of each frame in the finishing mill group 1 is adjustable. When bars with different specifications need to be rolled, the number of the racks in the corresponding finishing mill group 1 is selected according to requirements, for example, 2 racks are selected for the first finishing mill group 1, 2 racks are selected for the second finishing mill group 1, and the configuration is performed according to the required size.
In the embodiment, the intermediate rolling mill set comprises a non-pass rolling structure and a pass rolling structure, and the bar is subjected to non-pass rolling and pass rolling in sequence in the intermediate rolling mill set; the pre-finishing mill group adopts a pass rolling structure; the finishing mill group 1 adopts a pass rolling structure, more than one rack is arranged in the finishing mill group 1, and the roll gap of each rack in the finishing mill group 1 is adjustable. Compared with the traditional double-high-bar production, the double-high-bar production adopts a rolling structure with all hole patterns, the method has the advantages that the bar is subjected to non-hole-pattern rolling and hole-pattern rolling in sequence, the end face of the bar can be gradually shaped, so that the bar can adapt to a wider size rolling range, meanwhile, the roll gaps of the racks of the finishing mill group 1 can be adjusted, when the bar is gradually rolled and formed to the position of the finishing mill group 1, the bar can be subjected to the selection of the number of the racks and the adjustment of the roll gap of each rack according to the size of the double-high-bar to be rolled, one rolling line is suitable for the rolling of the double-high-bar with various sizes, on one hand, the spare amount of dies such as a roller, a roll ring and a guide can; on the other hand reduces the change quantity of core, collars and guide when changing the specification, promotes roll change and trades groove efficiency, is favorable to the production organization, reduces the manufacturing cost of enterprise. The roughing mill group adopts a flat roller hole-free rolling structure with a rectangular-vertical rectangular-rectangular route. The roller can be efficiently utilized, and the roller processing procedures are reduced. The pass rolling structure of the medium rolling mill set adopts a circular-elliptical pass route. The material type can be effectively controlled, and the stability of entering a pre-finish rolling material type is ensured. The pre-finishing mill group adopts a flat-box-pre-cutting-splitting-ellipse-circle hole type route. In the pre-finishing mill group, the bar is split in the pre-finishing mill group, a single material type enters the finishing mill group 1, the split material type balance is accurately ensured, and the rolling line difference of the finishing mill group 1 is effectively controlled. The rolling of the two branch lines is realized through the finishing mill group 1, finished products are rolled out from the finishing mill group 1, and at least two groups of finishing mill groups 1 are arranged on each branch line, so that the rolling with higher precision is realized. The roll gap of the stand of each finishing train group 1 is adjustable so that each finishing train group 1 can adjust the size of the product independently. The finishing mill group 1 adopts an oval-round pass route. And selecting different frames to obtain finished products by utilizing the single material type of the pre-finishing mill group and adjusting the number of the casting frames and the roll gaps.
In summary, the invention enables the bar material to obtain higher rolling precision by arranging at least two finishing mill groups 1 in the rolling direction, and simultaneously enables the controllability and the precision of the temperature to be better and higher during finish rolling by arranging the temperature control devices at the front and the rear of each finishing mill group 1, so that the inside and outside temperature difference of the bar material is reduced, and the metal performance of the bar material is improved. The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a two high stick control cold rolling system which characterized in that includes:
the rolling mill set is used for high-speed regional rolling, at least two rolling mill sets correspond to each rolling line, and rolled pieces sequentially pass through the two rolling mill sets;
and the temperature control equipment is arranged at the position before rolling and the position after rolling of the finishing mill group, and is used for cooling the rolled piece to realize isothermal low-temperature rolling.
2. The dual high bar cold rolling system of claim 1, wherein: the cutting machine set is used for cutting the rolled piece in the length direction to form two rolling branch lines, and at least two groups of finishing mill sets are correspondingly arranged on the two rolling branch lines respectively.
3. The dual high bar cold rolling system of claim 2, wherein: the cutting unit and the finishing mill unit are provided with a first temperature control system, a second temperature control system is arranged between the two adjacent finishing mill units, and the first temperature control system and the second temperature control system are respectively positioned behind the two rolling mills.
4. The dual high bar cold rolling system of claim 3, wherein: the length of the first temperature control system and the length of the second temperature control system meet the requirements of temperature control and temperature equalization.
5. The dual high bar cold rolling system of claim 4, wherein: the length of the first temperature control system is 85-90m, and the length of the second temperature control system is 90-95 m.
6. The dual high bar cold rolling system of claim 2, wherein: each rolling branch line is a linear line, a broken line or a curve, and the inner angle of the broken line and the inner angle of the curve are between 150 degrees and 180 degrees.
7. The dual high bar cold rolling system according to any one of claims 1 to 6, wherein: temperature control equipment includes water-cooling mechanism and samming mechanism, temperature sensor and mathematical model control, the water-cooling mechanism with control mathematical model electric connection, temperature sensor is used for gathering the rolled piece of temperature control equipment position or the surface temperature of the rolled piece before temperature control equipment.
8. The dual high bar cold rolling system of claim 7, wherein: the water-cooling mechanism water spray opening degree can be adjusted in time.
9. The dual high bar cold rolling system of claim 1, wherein: the roll gap of each frame in the finishing mill group is adjustable.
10. The dual high bar cold rolling system of claim 9, wherein: the finishing mill group adopts an oval-round pass route.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010568417.3A CN111589858A (en) | 2020-06-19 | 2020-06-19 | Double-high-rod controlled cold rolling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010568417.3A CN111589858A (en) | 2020-06-19 | 2020-06-19 | Double-high-rod controlled cold rolling system |
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| Publication Number | Publication Date |
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| CN111589858A true CN111589858A (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010568417.3A Pending CN111589858A (en) | 2020-06-19 | 2020-06-19 | Double-high-rod controlled cold rolling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114769309A (en) * | 2022-06-02 | 2022-07-22 | 中冶赛迪工程技术股份有限公司 | Production line and process for slitting high-speed bars |
-
2020
- 2020-06-19 CN CN202010568417.3A patent/CN111589858A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114769309A (en) * | 2022-06-02 | 2022-07-22 | 中冶赛迪工程技术股份有限公司 | Production line and process for slitting high-speed bars |
| CN114769309B (en) * | 2022-06-02 | 2024-04-02 | 中冶赛迪工程技术股份有限公司 | High-speed bar cutting production line and process |
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Address after: No.2 Jiangnan Avenue, Jiangnan street, Changshou District, Chongqing Applicant after: CHONGQING IRON & STEEL Co.,Ltd. Address before: No.1 Gangcheng Avenue, Changshou Economic Development Zone, Changshou District, Chongqing Applicant before: CHONGQING IRON & STEEL Co.,Ltd. |
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