CN113083912A - Hot-rolled H-shaped steel temperature uniformity control system and control method thereof - Google Patents
Hot-rolled H-shaped steel temperature uniformity control system and control method thereof Download PDFInfo
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- CN113083912A CN113083912A CN202110325846.2A CN202110325846A CN113083912A CN 113083912 A CN113083912 A CN 113083912A CN 202110325846 A CN202110325846 A CN 202110325846A CN 113083912 A CN113083912 A CN 113083912A
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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
- 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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
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Abstract
The invention discloses a temperature uniformity control system for hot-rolled H-shaped steel, wherein two thermal imagers are arranged above the H-shaped steel, two thermal imagers are also arranged below the H-shaped steel, and the two thermal imagers above the H-shaped steel are symmetrically arranged by taking a web as a symmetric center; and arranging a thermal imager outside two flanges of the H-shaped steel at the same position of the thermal imagers in the longitudinal direction of the H-shaped steel and above and below the H-shaped steel respectively, wherein the temperature measuring range of the thermal imager exceeds the two side edges of the flanges. The invention also discloses a control method of the control system. By adopting the technical scheme, the control on the temperature uniformity of the whole section in the rolling process of the hot-rolled H-shaped steel is realized, and an effective early-stage control means is provided for improving the structural property uniformity of the whole section of the hot-rolled H-shaped steel, reducing the internal stress and improving the strip shape.
Description
Technical Field
The invention belongs to the technical field of steel rolling production process control. More particularly, the invention relates to a full-section temperature uniformity control system for hot-rolled H-shaped steel. The invention also relates to a control method of the control system.
Background
H-shaped steel is used as an economical section steel and is widely applied to various steel structural members. The use of the H-shaped steel can lighten the structure by 20-40 percent, save metal by 5-15 percent and play an important role in national economic construction.
The temperature distribution of each part of the H-shaped steel is very uneven in the rolling and cooling processes due to the complexity of the section structure, the temperature of the joint part of the flange and the web is highest, the temperature is gradually reduced towards the end part of the flange, and the temperature difference of the whole section can reach more than 100 ℃. This phenomenon of temperature non-uniformity is objective and strongly influences the stability of the rolling process, as well as the uniformity and stability of the product texture properties.
According to research, almost all on-line temperature measuring devices in the actual rolling process of an H-shaped steel production line monitor the temperature distribution condition of a certain fixed point in the width direction of the outer surface of the flange of a rolled piece along the length direction of the rolled piece, the temperature of the full section (particularly in the width direction) of the rolled piece lacks of a measuring and monitoring device and the quantity representation of temperature distribution, and therefore the temperature uniformity control of the full section of the hot-rolled H-shaped steel cannot be realized.
Relevant prior art literature search results:
1. patent document CN1018917960 discloses a device and method for measuring billet heating temperature uniformity. The measuring device includes: the lens, the grating, the detector, the imaging device and the computer are connected in sequence; the temperature recorder is arranged on the surface of the steel billet before the steel billet enters the furnace; the thermocouple is arranged at the bottom of a measuring hole in the steel billet before the steel billet enters the furnace, the upper part of the measuring hole is filled with refractory materials, and the thermocouple is connected with a temperature recorder; in the heating process of the steel billet, measuring the internal temperature of the steel billet through a thermocouple, and storing temperature data measured by the thermocouple according to the set time step through a temperature recorder; after the steel billet is discharged from the furnace, acquiring an upper surface temperature image and a lower surface temperature image of the steel billet through a lens, a grating, a detector and an imaging device; the uniformity of the heating temperature of the steel billet is obtained through the analysis of the computer based on the temperature data inside the steel billet, the temperature image of the upper surface and the temperature image of the lower surface, and the technical problem of poor evaluation accuracy of the uniformity of the heating temperature of the steel billet in the prior art is solved. However, the temperature distribution of the full cross section during the rolling process is not described.
2. Patent document No. CN110732559A discloses a method for evaluating the temperature uniformity of an intermediate slab of a hot-rolled strip in the width direction, comprising the steps of: measuring the temperature of the intermediate billet in the hot rolling process by using a thermal imager, and introducing a shot thermal imaging graph into a computer; processing the image data by using thermal imaging analysis software; filling a cross grid into the thermal imaging graph by using Photoshop software, dividing the image into a plurality of grids, and mainly analyzing the edge temperature drop value of the intermediate billet and the width value of the edge temperature drop area through the grids. The method can accurately and objectively reflect the edge temperature drop data in the width direction of the strip steel and the width data of the area with the temperature drop, so as to solve the problem of evaluating the temperature uniformity in the width direction in the existing billet heating process and the problem that the temperature distribution condition in the width direction of the intermediate billet in the rolling process is not explained. The invention is only directed at hot rolled strip steel, and only provides a temperature uniformity evaluation method, and how to actually apply is not mentioned.
3. Patent document No. CN103056175A discloses a method for selectively cooling and controlling the flange of a hot-rolled H-section steel, which comprises installing a cooling device on a centering device of an H-section steel rolling mill, adjusting the distance between the cooling device and the H-section steel blank, detecting the distance signal of the head or the tail of the H-section steel blank by a thermal detector before the H-section steel blank is bitten into the rolling mill, and transmitting the distance signal to a remote computer, and controlling an electronic control valve installed on the cooling device by the remote computer to control the opening of a water cooling nozzle of the cooling device, the water flow and the water pressure of cooling water sprayed out by the water cooling nozzle, so as to selectively spray water and cool the flange of the H-section steel. The cooling device is installed on a rolling mill centering device, is high in cost and difficult to maintain, can only improve the cooling uniformity of the outer side of the flange of a rolled piece, and cannot control the cooling uniformity of the full section of the rolled piece.
4. Patent publication No. CN102755999A discloses a cooling device between stands for hot-rolling H-section steel, the cooling device including a plurality of temperature sensors provided in each pass of an H-section steel production line for detecting the temperature of the H-section steel in each pass, and a flow rate control unit for controlling the opening degree of each electromagnetic valve in accordance with the temperature of each temperature sensor. The cooling device can obtain the following effects: the online integral structure has reasonable design, convenient installation and maintenance and good use effect, and can carry out reasonable temperature control on the rough, the middle and the fine rolling in each pass according to the requirements of designers particularly in the whole finish rolling process, so that the residual stress of the H-shaped steel product is greatly reduced, the yield of the H-shaped steel is greatly improved, and the product performance can be improved. The method has the disadvantages that the temperature control of the outer side of the flange of the rolled piece can only be realized, the precision is not high, and the temperature control of the full section of the rolled piece and the reduction of the residual stress can not be realized.
Disclosure of Invention
The invention provides a temperature uniformity control system for hot-rolled H-shaped steel, and aims to control the temperature uniformity of the whole section of the hot-rolled H-shaped steel.
In order to achieve the purpose, the invention adopts the technical scheme that:
according to the temperature uniformity control system for the hot-rolled H-shaped steel, the web plate of the H-shaped steel is in a horizontal state, two thermal imagers are arranged above the H-shaped steel and respectively face the flange and the web plate on two sides; on the cross section of the H-shaped steel, the temperature measuring range of each thermal imager exceeds the flange edge on one side and the longitudinal center of the web plate; two thermal imaging cameras are also arranged below the H-shaped steel and are symmetrically arranged with the two thermal imaging cameras above the H-shaped steel by taking the web as a symmetric center; and arranging a thermal imager outside two flanges of the H-shaped steel at the same position of the thermal imagers in the longitudinal direction of the H-shaped steel and above and below the H-shaped steel respectively, wherein the temperature measuring range of the thermal imager exceeds the two side edges of the flanges.
The thermal imaging cameras are distributed behind the cooling device of the rolling mill, namely the thermal imaging cameras are used for obtaining the temperature data of the whole section of the H-shaped steel cooled by the cooling device.
The control system is provided with a remote computer; each thermal imager is connected with a remote computer through a signal line; the remote computer is also connected with a cooling liquid electronic control valve and a cooling liquid injection device in the cooling device through a signal line;
and the remote computer is provided with hot-rolled H-shaped steel full-section temperature uniformity control software.
In order to achieve the same purpose as the technical scheme, the invention also provides a control method of the hot-rolled H-shaped steel temperature uniformity control system, which comprises the following steps:
the control method comprises the steps of measuring the temperature of the full section of the hot-rolled H-shaped steel by a thermal imager in the rolling process, and transmitting temperature distribution information to a remote computer; the remote computer analyzes the temperature distribution condition of the whole section of the H-shaped steel by utilizing hot rolling H-shaped steel temperature uniformity control software, controls a cooling liquid electronic control valve and a cooling liquid injection device which are arranged on a cooling device, and controls various parameters of the cooling device; through the analysis to the temperature data, constantly adjust cooling device's each item parameter to realize the whole section temperature homogeneity control to hot rolling H shaped steel in rolling process.
The parameters of the cooling device comprise one of a spraying angle, a water flow, a pressure and a spraying time, or any combination of a plurality of the parameters.
The control method comprises the following steps:
step 1, acquiring full-section temperature measurement data of an H-shaped steel rolled piece through a thermal imager, and uploading the data to a remote computer;
step 3, the control system analyzes the big data in the database;
step 4, a pre-intervention solution is provided according to the big data analysis result;
step 5, the control system performs pre-intervention according to a pre-intervention solution;
and 6, controlling the process to be retraced and fed back circularly.
In the step 1, a thermal imager is used as a temperature measuring tool for the H-shaped steel rolled piece, each transient surface of the H-shaped steel rolled piece from the cooling device is photographed and analyzed, and measured data are uploaded to a database of the control system.
In the step 2, the production characteristic parameters of the H-shaped steel rolled piece comprise the steel grade, specification and pass information of the H-shaped steel.
And 3, drawing a temperature curve according to the data measured and analyzed by the thermal imager, and visually observing the full-section temperature distribution rule of the H-shaped steel rolled piece by using a display device of the control system.
In the step 4, a solution is formulated by using the temperature distribution rule represented by the temperature distribution curve provided in the step 3 and the position of the corresponding H-shaped steel rolled piece in combination with the process specification to make a configuration table.
In the step 5, the control system reads the parameters of the configuration table, controls the electronic control valve of the cooling liquid installed on the cooling device and performs pre-intervention on the cooling device.
In the step 6, the H-shaped steel rolled piece implemented by adopting the configuration table solution has a new mark, the full section temperature of the newly marked H-shaped steel rolled piece is measured again, data is uploaded, and new data analysis is carried out; and optimizing a configuration table according to the new temperature curve and the distribution rule, and continuously and circularly improving until the requirement of a preset interval of temperature uniformity is met.
By adopting the technical scheme, the invention realizes the control of the temperature uniformity of the whole section in the rolling process of the hot-rolled H-shaped steel and provides an effective early-stage control means for improving the structural property uniformity of the whole section of the hot-rolled H-shaped steel, reducing the internal stress and improving the strip shape; the temperature distribution condition of the whole section of the H-shaped steel can be accurately and objectively reflected, so that the problem that the temperature distribution condition of the whole section of a rolled piece cannot be intuitively reflected in the conventional H-shaped steel rolling process is solved, actual production can be effectively guided, and the significance is great; the data can be directly called when products of the same steel grade and the same specification are rolled subsequently, so that the time for regulating and controlling again is saved.
Drawings
The contents of the drawings and the reference numbers in the drawings are briefly described as follows:
FIG. 1 is a schematic diagram of a temperature control system according to the present invention;
FIG. 2 is a flow chart of model control according to the present invention.
Labeled as:
1. left side thermal imaging system, 2, go up thermal imaging system, 3, H shaped steel, 4, lower thermal imaging system, 5, temperature measurement scope, 6, right thermal imaging system.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.
The structure of the invention as shown in figure 1 is a control system for the temperature uniformity of the whole section of the hot-rolled H-shaped steel, and the web plate of the H-shaped steel 3 is in a horizontal state. The invention aims at a method for controlling the temperature uniformity of a full section of hot-rolled H-shaped steel in the rolling process, which comprises a temperature uniformity gauge pointer and subsequent application.
In order to solve the problems in the prior art, overcome the defects and realize the aim of controlling the temperature uniformity of the full section of the hot-rolled H-shaped steel, the invention adopts the technical scheme that:
as shown in fig. 1, in the temperature uniformity control system for hot-rolled H-section steel of the present invention, two thermal imaging cameras 2 are arranged above the H-section steel 3, and the two thermal imaging cameras 2 respectively face flanges and webs on two sides; on the cross section of the H-shaped steel 3, the temperature measuring range 5 of each thermal imager 2 exceeds the flange edge on one side and the longitudinal center of the web plate;
two thermal imaging cameras 4 are also arranged below the H-shaped steel 3 and are symmetrically arranged with the two thermal imaging cameras 2 above the H-shaped steel 3 by taking the web as a symmetric center;
a thermal imager 1 and a thermal imager 6 are respectively arranged at the same positions of the thermal imager 2 and the thermal imager 4 which are arranged outside two flanges of the H-shaped steel 3 and are positioned in the longitudinal direction of the H-shaped steel 3 and above and below the H-shaped steel 3, and the temperature measuring range 5 of the thermal imager exceeds the two side edges of the flanges.
Therefore, all the surfaces of the H-shaped steel 3 can be covered by the temperature measuring range 5 of the thermal imager, so that the temperature data can be collected more comprehensively, the distribution condition of the temperature can be reflected more truly, and further the temperature control technical measures can be taken in a targeted manner.
The thermal imager uses an infrared detector and an optical imaging objective to receive the infrared radiation energy distribution pattern of a measured target and reflects the infrared radiation energy distribution pattern on a photosensitive element of the infrared detector, so as to obtain an infrared thermal imaging image. This thermal image corresponds to the thermal profile of the object surface.
The thermal imaging cameras are distributed behind the cooling device of the rolling mill, namely the thermal imaging cameras are used for obtaining the temperature data of the full section of the H-shaped steel 3 cooled by the cooling device.
The control system is provided with a remote computer; each thermal imager is connected with a remote computer through a signal line; the remote computer is also connected with a cooling liquid electronic control valve and a cooling liquid injection device in the cooling device through a signal line;
after the thermal imaging instrument obtains the infrared thermal imaging image, the obtained thermal imaging image is guided into a computer, and special analysis software can be used for obtaining the temperature data of any position of the shot image.
And the remote computer is provided with hot-rolled H-shaped steel full-section temperature uniformity control software.
The invention utilizes the thermal imager, the remote computer and the electronic control valve on the cooling device to realize the control of the temperature uniformity of the whole section in the rolling process of the hot-rolled H-shaped steel. The method comprises the following steps: a thermal imager device is added behind a cooling device to measure and analyze a certain transient state of the whole section in the rolling process of the hot-rolled H-shaped steel, the temperature distribution condition of the whole section of the H-shaped steel is analyzed by software, and temperature distribution information is transmitted to a remote computer to analyze big data; the remote computer controls an electronic control valve arranged on the cooling device according to the big data analysis result, and controls the spraying angle, the water flow, the pressure and the spraying time of the cooling water; through multiple data analysis and adjustment and cyclic improvement, the temperature uniformity of the whole section in the rolling process of the hot-rolled H-shaped steel is controlled, and an effective early-stage control means is provided for improving the structural property uniformity of the whole section of the hot-rolled H-shaped steel, reducing the internal stress and improving the strip shape.
The method can also accurately and objectively reflect the temperature distribution condition of the whole section of the H-shaped steel so as to solve the problem that the temperature distribution condition of the whole section of a rolled piece cannot be directly reflected in the existing H-shaped steel rolling process.
An operator can take the instantaneous temperature of any part of the whole section of a rolled piece, intervene in advance aiming at the rolling process (such as normalizing rolling, QST and the like) with temperature control requirement in the rolling process, monitor the effect generated by dry prognosis again and feed back to a computer, further count data again, improve the circulation type, improve the temperature control accuracy and efficiency, effectively guide the actual production and have great significance.
The data can be directly called when products of the same steel grade and the same specification are rolled subsequently, so that the readjustment time is saved.
As shown in fig. 2, in order to achieve the same object of the invention as the above technical solution, the present invention further provides a control method of the above hot-rolled H-section temperature uniformity control system, which comprises the following steps:
the control method comprises the steps of measuring the temperature of the full section of the hot-rolled H-shaped steel 3 in the rolling process through a thermal imager, and transmitting temperature distribution information to a remote computer; the remote computer analyzes the temperature distribution condition of the full section of the H-shaped steel 3 by utilizing the temperature uniformity control software of the hot-rolled H-shaped steel 3, controls a cooling liquid electronic control valve and a cooling liquid injection device which are arranged on the cooling device, and controls various parameters of the cooling device; through the analysis to the temperature data, constantly adjust cooling device's each item parameter to realize the whole section temperature homogeneity control to hot rolling H shaped steel 3 in rolling process.
The parameters of the cooling device comprise one of a spraying angle, a water flow, a pressure and a spraying time, or any combination of a plurality of the parameters.
The control method comprises the following steps:
step 1, acquiring full-section temperature measurement data of an H-shaped steel 3 rolled piece through a thermal imager, and uploading the data to a remote computer;
step 3, the control system analyzes the big data in the database;
step 4, a pre-intervention solution is provided according to the big data analysis result;
step 5, the control system performs pre-intervention according to a pre-intervention solution;
and 6, controlling the process to be retraced and fed back circularly.
All the above steps are premised on clarifying the criterion for evaluating the temperature uniformity of the entire cross section of the hot-rolled H-section steel 3, i.e., setting the temperature range.
Further:
in the step 1, a thermal imager is used as a temperature measuring tool for the H-shaped steel 3 rolled piece, each transient surface of the H-shaped steel 3 rolled piece coming out of the cooling device is photographed and analyzed, and measured data are uploaded to a database of the control system.
In the step 2, the production characteristic parameters of the H-shaped steel 3 rolled piece comprise steel grade, specification and pass information of the H-shaped steel 3.
And 3, drawing a temperature curve according to the data measured and analyzed by the thermal imager, and visually observing the full-section temperature distribution rule of the H-shaped steel 3 rolled piece by using a display device of the control system.
The abscissa of the temperature curve corresponds to the position of the whole section of a rolled piece, the precision is 10mm, the starting point is the central position of the upper surface of a web of the H-shaped steel 3 rolled piece, the abscissa sequentially corresponds to the inner arc R angle at the transition position of the upper surface of an OS (operating side) web and a flank of the rolled piece, the upper end part of the OS side flange, the plane of the OS side flange, the inner arc R angle at the transition position of the lower surface of the OS side web and the flank, the lower surface of the web of the H-shaped steel 3 rolled piece, the inner arc R angle at the transition position of the lower surface of a DS (driving side) web and the flank, the plane of the DS side flange, the upper end part of the DS side flange, the inner arc R angle at the transition position of the upper surface of the DS side web and the flank, and; meanwhile, the temperature curve corresponds to the production characteristic parameters of the rolled piece.
In the step 4, a solution is formulated by using the temperature distribution rule represented by the temperature distribution curve provided in the step 3 and the position of the corresponding H-shaped steel 3 rolled piece in combination with the process specification to make a configuration table.
The configuration table can be used as a supplement of a system model through manual modification, and configuration parameters are mainly set according to the spraying angle, the water flow, the water pressure and the spraying time of cooling water in each pass.
In the step 5, the control system reads the parameters of the configuration table, controls the electronic control valve of the cooling liquid installed on the cooling device and performs pre-intervention on the cooling device.
In the step 6, the H-shaped steel 3 rolled piece implemented by adopting the configuration table solution has a new mark, the full-section temperature of the newly marked H-shaped steel 3 rolled piece is measured again, data is uploaded, and new data analysis is carried out; and optimizing a configuration table according to the new temperature curve and the distribution rule, and continuously and circularly improving until the requirement of a preset interval of temperature uniformity is met.
The rolled piece implemented by the solution of the configuration table has a new mark, the temperature of the full section of the rolled piece with the new mark is measured again and data is uploaded, new data analysis is carried out, the configuration table is optimized according to a new temperature curve and a new distribution rule, and the cycle improvement is continuously carried out until the requirement of a preset interval of temperature uniformity is met.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (13)
1. The utility model provides a hot rolling H shaped steel temperature homogeneity control system, the web of H shaped steel (3) in the horizontality, characterized in that: two thermal imaging cameras (2) are arranged above the H-shaped steel (3), and the two thermal imaging cameras (2) respectively face to flanges and webs on two sides; on the cross section of the H-shaped steel (3), the temperature measuring range (5) of each thermal imaging system (2) exceeds the flange edge on one side and the longitudinal center of the web plate; two thermal imaging cameras (4) are also arranged below the H-shaped steel (3) and are symmetrically arranged with the two thermal imaging cameras (2) above the H-shaped steel (3) by taking a web as a symmetric center; the two thermal imaging instruments (1, 6) are respectively arranged at the same positions of the two flanges of the H-shaped steel (3) in the longitudinal direction of the H-shaped steel (3) and the thermal imaging instruments (2, 4) above and below the H-shaped steel (3), and the temperature measuring range (5) of the thermal imaging instruments exceeds the two side edges of the flanges.
2. The hot-rolled H-section steel temperature uniformity control system according to claim 1, characterized in that: the thermal imaging cameras are distributed behind the cooling device of the rolling mill, namely the thermal imaging cameras are used for obtaining the temperature data of the full section of the H-shaped steel (3) cooled by the cooling device.
3. The hot-rolled H-section steel temperature uniformity control system according to claim 2, characterized in that: the control system is provided with a remote computer; each thermal imager is connected with a remote computer through a signal line; the remote computer is also connected with a cooling liquid electronic control valve and a cooling liquid injection device in the cooling device through signal lines.
4. The hot-rolled H-section steel temperature uniformity control system according to claim 3, characterized in that: and the remote computer is provided with hot-rolled H-shaped steel full-section temperature uniformity control software.
5. The control method of the temperature uniformity control system for hot-rolled H-section steel according to any one of claims 1 to 4, characterized in that: the control method comprises the steps of measuring the temperature of the full section of the hot-rolled H-shaped steel (3) by a thermal imager in the rolling process, and transmitting temperature distribution information to a remote computer; the remote computer analyzes the temperature distribution condition of the whole section of the H-shaped steel (3) by utilizing temperature uniformity control software of the hot-rolled H-shaped steel (3), controls a cooling liquid electronic control valve and a cooling liquid injection device which are arranged on the cooling device, and controls various parameters of the cooling device; through the analysis of the temperature data, various parameters of the cooling device are continuously adjusted, so that the full-section temperature uniformity control of the hot-rolled H-shaped steel (3) in the rolling process is realized.
6. The method of controlling the temperature uniformity of hot-rolled H-section steel according to claim 5, characterized in that: the parameters of the cooling device comprise one of a spraying angle, a water flow, a pressure and a spraying time, or any combination of a plurality of the parameters.
7. The method of controlling the temperature uniformity of hot-rolled H-section steel according to claim 5 or 6, characterized in that: the control method comprises the following steps:
step 1, acquiring full-section temperature measurement data of a rolled piece of the H-shaped steel (3) by a thermal imager, and uploading the data to a remote computer;
step 2, collecting production characteristic parameters of the H-shaped steel (3) rolled piece and uploading the production characteristic parameters to a database of a control system;
step 3, the control system analyzes the big data in the database;
step 4, a pre-intervention solution is provided according to the big data analysis result;
step 5, the control system performs pre-intervention according to a pre-intervention solution;
and 6, controlling the process to be retraced and fed back circularly.
8. The method of controlling the temperature uniformity of hot-rolled H-section steel according to claim 7, characterized in that: in the step 1, a thermal imager is used as a temperature measuring tool for the H-shaped steel (3) rolled piece, each transient surface of the H-shaped steel (3) rolled piece coming out of the cooling device is photographed and analyzed, and measured data are uploaded to a database of a control system.
9. The method of controlling the temperature uniformity of hot-rolled H-section steel according to claim 7, characterized in that: in the step 2, the production characteristic parameters of the rolled piece of the H-shaped steel (3) comprise the steel grade, specification and pass information of the H-shaped steel (3).
10. The method of controlling the temperature uniformity of hot-rolled H-section steel according to claim 7, characterized in that: and in the step 3, a temperature curve is drawn according to the data measured and analyzed by the thermal imager, and the temperature distribution rule of the whole section of the H-shaped steel (3) rolled piece is visually observed by using a display device of the control system.
11. The method of controlling the temperature uniformity of hot-rolled H-section steel according to claim 7, characterized in that: in the step 4, a solution is formulated by using a temperature distribution rule represented by the temperature distribution curve provided in the step 3 and the position of the corresponding H-shaped steel (3) rolled piece in combination with process specifications to prepare a configuration table.
12. The method of controlling the temperature uniformity of hot-rolled H-section steel according to claim 7, characterized in that: in the step 5, the control system reads the parameters of the configuration table, controls the electronic control valve of the cooling liquid installed on the cooling device and performs pre-intervention on the cooling device.
13. The method of controlling the temperature uniformity of hot-rolled H-section steel according to claim 7, characterized in that: in the step 6, the H-shaped steel (3) rolled piece implemented by adopting the configuration table solution has a new mark, the full-section temperature of the newly marked H-shaped steel (3) rolled piece is measured again, data is uploaded, and new data analysis is carried out; and optimizing a configuration table according to the new temperature curve and the distribution rule, and continuously and circularly improving until the requirement of a preset interval of temperature uniformity is met.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113546959A (en) * | 2021-07-20 | 2021-10-26 | 马鞍山钢铁股份有限公司 | Device and method for reducing hot-rolled H-shaped steel web waves |
| CN113969335A (en) * | 2021-10-25 | 2022-01-25 | 郑州铁路职业技术学院 | Steel rail welding cooling device |
| CN114535289A (en) * | 2022-02-28 | 2022-05-27 | 马鞍山钢铁股份有限公司 | Method and system for controlling size uniformity of flange of hot-rolled H-shaped steel |
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| CN113546959A (en) * | 2021-07-20 | 2021-10-26 | 马鞍山钢铁股份有限公司 | Device and method for reducing hot-rolled H-shaped steel web waves |
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| CN114535289B (en) * | 2022-02-28 | 2024-03-05 | 马鞍山钢铁股份有限公司 | Method and system for controlling size uniformity of flange of hot-rolled H-shaped steel |
| CN114833206A (en) * | 2022-05-25 | 2022-08-02 | 太原理工大学 | Electromagnetic induction heat supplementing device and method for rolling process of super-large H-shaped steel |
| CN114833206B (en) * | 2022-05-25 | 2023-12-22 | 太原理工大学 | Electromagnetic induction heat supplementing device and method for ultra-large H-shaped steel rolling process |
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