CN117340014A - Method and device for controlling quality of head of finish rolling strip steel - Google Patents
Method and device for controlling quality of head of finish rolling strip steel Download PDFInfo
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- CN117340014A CN117340014A CN202311404161.2A CN202311404161A CN117340014A CN 117340014 A CN117340014 A CN 117340014A CN 202311404161 A CN202311404161 A CN 202311404161A CN 117340014 A CN117340014 A CN 117340014A
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- finish rolling
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- strip steel
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- 238000005096 rolling process Methods 0.000 title claims abstract description 175
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005070 sampling Methods 0.000 claims abstract description 75
- 241000277275 Oncorhynchus mykiss Species 0.000 claims abstract description 32
- 238000003908 quality control method Methods 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 description 7
- 238000011217 control strategy Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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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
- B21B37/72—Rear end control; Front end control
-
- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
-
- 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
-
- 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
Abstract
The application provides a finish rolling strip steel head quality control method and device, wherein the method comprises the following steps: after receiving a steel signal of a finish rolling inlet, performing temperature sampling on an intermediate billet of the finish rolling inlet to obtain a plurality of groups of first sampling temperatures, wherein the temperature sampling is performed within a preset length range by taking the head of the intermediate billet as a starting point; and determining a first target temperature of the intermediate blank according to the plurality of groups of first sampling temperatures, and performing finish rolling outlet strip steel head finish rolling temperature setting calculation based on the first target temperature, so that the finish rolling outlet strip steel head finish rolling temperature and thickness meet the preset precision requirement. The method can effectively improve the finish rolling temperature control precision of the finish rolling outlet strip steel head, and improve the strip threading stability of the intermediate billet head and the strip steel head quality control precision.
Description
Technical Field
The invention relates to the field of steel production and application, in particular to a method and a device for controlling the head quality of finish rolling strip steel.
Background
In the hot continuous rolling production process, the intermediate billet reaches a finish rolling inlet pyrometer, the actual measured temperature of the head of the intermediate billet is collected, then finish rolling secondary preset calculation is carried out, and all frame set values for controlling the thickness, width, temperature and speed of the head of the strip steel, such as rolling force, speed, F7 frame outlet temperature and the like of each finish rolling frame, are calculated mainly according to the feeding parameters of the rough rolling intermediate billet and the target parameters of the finish rolling unit.
However, the preset calculation precision of the temperature and the rolling force of the head of the finish rolling outlet strip steel in the prior art is low, so that the deviation between the final rolling temperature and the set value of the rolling force of the head of the finish rolling outlet strip steel and the actual measured value is large, and the threading stability of the head of the intermediate billet and the thickness control of the head of the strip steel are affected.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a method and a device for controlling the quality of a finish rolling strip steel head, which mainly solve the problems that the finish rolling temperature and the preset precision of rolling force of a finish rolling outlet strip steel head are low and the strip threading stability of an intermediate blank and the quality control precision of the strip steel head are affected due to unreasonable temperature sampling control strategy of a finish rolling inlet.
In order to achieve the above and other objects, the present invention adopts the following technical scheme.
The application provides a finish rolling strip steel head quality control method, which comprises the following steps: after receiving a steel signal of a finish rolling inlet, performing temperature sampling on an intermediate billet of the finish rolling inlet to obtain a plurality of groups of first sampling temperatures, wherein the temperature sampling is performed within a preset length range by taking the head of the intermediate billet as a starting point; and determining a first target temperature of the intermediate blank according to the plurality of groups of first sampling temperatures, and setting the finish rolling outlet strip steel head finish rolling temperature based on the first target temperature, so that the finish rolling outlet strip steel head finish rolling temperature and the thickness meet the preset precision requirement.
In an embodiment of the present application, determining the first target temperature of the intermediate blank according to the plurality of sets of first sampling temperatures includes: and carrying out weighted average on the plurality of groups of first sampling temperatures to obtain the first target temperature.
In an embodiment of the present application, the temperature sampling of the intermediate billet of the finish rolling inlet further includes: acquiring second sampling temperatures of a plurality of points of the head of the intermediate blank; and determining a second target temperature of the intermediate blank according to the second sampling temperatures of different points, and performing finish rolling mill rolling force setting calculation on each stand based on the second target temperature, so that the head rolling force and thickness of the finish rolling mill stand strip steel meet the preset precision requirement.
In an embodiment of the present application, determining the second target temperature of the intermediate blank according to the second sampling temperatures of different points includes: and carrying out weighted average on the second sampling temperatures of different points to obtain the second target temperature.
In one embodiment of the present application, the predetermined length range is included within 1.28m from the head of the intermediate blank.
The application provides a finish rolling belted steel head quality control device, include: the temperature sampling module is used for sampling the temperature of the intermediate billet at the finish rolling inlet after receiving the steel signal at the finish rolling inlet to obtain a plurality of groups of first sampling temperatures, wherein the temperature sampling is carried out by taking the head of the intermediate billet as a starting point and sampling within a preset length range; and the finish rolling preset module is used for determining a first target temperature of the intermediate blank according to the plurality of groups of first sampling temperatures, and performing finish rolling outlet strip steel head finish rolling temperature setting calculation based on the first target temperature so that the finish rolling outlet strip steel head finish rolling temperature and thickness meet preset precision requirements.
In an embodiment of the present application, the apparatus further includes a steel signal detection module, configured to generate the steel signal when the intermediate billet reaches the preset position of the finish rolling inlet.
As described above, the method and the device for controlling the quality of the head of the finish rolling strip steel have the following beneficial effects.
According to the method, when the intermediate billet head reaches the finish rolling inlet pyrometer to carry out finish rolling secondary preset calculation, the intermediate billet head at the finish rolling inlet pyrometer is not avoided, temperature sampling is directly carried out on a plurality of points in a certain distance with steel initiation on the intermediate billet head, then the intermediate billet head temperature calculated by the finish rolling secondary preset calculation is determined, the more accurate intermediate billet head finish rolling inlet temperature during the finish rolling secondary preset calculation can be obtained, the finish rolling outlet strip steel head finish rolling temperature and the rolling force preset precision are improved, the finish rolling outlet strip steel head thickness quality control precision is improved, and the intermediate billet head threading stability is effectively improved.
Drawings
FIG. 1 is a flow chart of a method for controlling the head quality of a finish rolled strip according to an embodiment of the present application.
FIG. 2 is a block diagram showing a finish rolling strip steel head quality control apparatus according to an embodiment of the present application.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
The inventor researches find that:
when the final rolling temperature of the head part of the strip steel and the rolling force of each stand are calculated through secondary preset of the existing finish rolling, the actual measured temperature of the finish rolling inlet of the head part of the intermediate billet is avoided, and the temperature which is sampled for a certain distance after the avoidance is weighted and averaged and is used for calculating parameters such as the final rolling temperature of the head part, the rolling force of each stand, the outlet thickness, the speed and the like; because the head finish rolling temperature and the rolling force are calculated by the existing control strategy, the actual measured temperature of the intermediate billet is avoided, and the deviation between the head finish rolling temperature and the target finish rolling temperature is large in the production process, the deviation between the actual measured rolling force of the strip steel head and the preset rolling force is large, so that the deviation between the thickness of a finished product and the target thickness is large, and the threading stability of the head of the intermediate billet and the quality (thickness, width, performance and the like) of the product are influenced.
The existing control method is as follows:
the finish rolling temperature of the head of the finish rolled strip steel adopts the measured temperature of a fixed sampling section 2-3.76 m after the finish rolling inlet temperature of the intermediate billet is avoided by 2 m, so as to obtain a sampling value of the head temperature of the intermediate billet, calculate the outlet temperature of each stand, the rolling speed, the finish rolling temperature of the head according to the sampling value of the intermediate billet, the target value of the finish rolling temperature and the like, calculate the outlet temperature of each stand, calculate the rolling force after calculating the outlet temperature of each stand, and if the outlet temperature of each stand of the finish rolling is deviated, the measured rolling force of each stand deviates greatly from the set rolling force, thereby influencing the threading stability of the head of the intermediate billet and the quality control of the thickness of the head.
The main problems of the existing control method are as follows:
1. when finish rolling is calculated for the second time by the existing control method, temperature and rolling force preset calculation finish rolling inlet temperature sampling are avoided, so that the precision of the preset rolling force is low, the real temperature of the head of the intermediate blank cannot be reflected, the deviation between the preset rolling force and the actually measured rolling force of the threading head is larger, and the thickness deviation of the head of the strip steel is larger;
2. the existing control method fixes the finish rolling inlet temperature sampling section, and the sampling position is close to the rear, so that the preset precision of the finish rolling temperature of the head part of the strip steel is low, and the rolling stability and the product quality control are affected.
Based on the above problems in the prior art, the present application provides a method and an apparatus for controlling the quality of a finish rolling strip steel head, and a technical scheme of the present application will be described in detail with reference to specific embodiments.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for controlling the head quality of a finish rolled strip according to an embodiment of the present application. The invention provides a quality control method for the head of finish rolling strip steel, which comprises the following steps: .
And S100, after receiving a steel signal of the finish rolling inlet, performing temperature sampling on the intermediate billet of the finish rolling inlet to obtain a plurality of groups of first sampling temperatures, wherein the temperature sampling is performed within a preset length range by taking the head of the intermediate billet as a starting point.
In one embodiment, a temperature sensor is provided at the finish rolling inlet, which can be used to sample the temperature of the intermediate billet entering the finish rolling inlet. The temperature sensor can adopt a pyrometer, a thermocouple and the like, and specific devices can be selected according to practical application requirements without limitation. A steel signal detection device can be arranged in front of the temperature sensor, and when the intermediate billet is conveyed to a preset point position in front of the finish rolling inlet, the intermediate billet can be detected by the steel signal detection device to generate a steel signal. In an exemplary case where there is no intermediate billet, the signal detection terminal level of the steel-present signal detection device is 0, and when it is detected that the intermediate billet reaches a specified position, a steel-present signal is generated, the signal level being 1. The steel signal detection device can adopt a hot metal detector, a laser sensor, an infrared sensor and the like, and can be specifically selected according to the actual application requirements without limitation.
In an embodiment, after receiving the steel signal, the rear end controller may control the temperature sensor to sample the temperature of the intermediate billet at the finish rolling inlet, and sample the temperatures of a plurality of points of the intermediate billet within a preset length range by taking the head of the intermediate billet as a starting point during sampling, so as to obtain a plurality of sampling temperature values. The specific sampling length and sampling frequency can be set according to practical application requirements, and are not limited herein. The head of the intermediate billet is directly used as a sampling starting point, so that more accurate temperature of the head of the intermediate billet can be obtained, secondary preset calculation can be conveniently carried out based on the sampling temperature of the intermediate billet entering the finish rolling inlet pyrometer, and the threading stability of the head of the intermediate billet and the quality control precision of the head of the finish rolling outlet strip steel are ensured.
Step S110, determining a first target temperature of the intermediate blank according to the plurality of groups of first sampling temperatures, and performing finish rolling outlet strip steel head finish rolling temperature setting calculation based on the first target temperature, so that the finish rolling outlet strip steel head finish rolling temperature and thickness meet the preset precision requirement.
In one embodiment, determining the first target temperature of the intermediate blank from the plurality of sets of first sampled temperatures includes: and carrying out weighted average on the plurality of groups of first sampling temperatures to obtain the first target temperature.
After receiving a steel signal of 1 at a finish rolling inlet, sampling the temperature of the head of the intermediate billet, wherein temperature avoidance is not performed during sampling, the measured temperature in 1.28m after the steel signal is 1 is weighted and averaged and then is used for calculating the outlet temperature, rolling speed and head finish rolling temperature of each frame of the finish rolling, the roller way speed at a pyrometer of the finish rolling inlet is 1m/s, the temperature sampling period can be set to 128ms, and the first target temperature Fet= (Fet1+Fet2+Fet3+Fet4+Fet5+Fet6+Fet7+Fet8+Fet9+Fet10) for calculating the head finish rolling temperature of the strip steel at the finish rolling outlet is set, wherein Fet1-10 are 10 groups of sampling temperatures in 1.28m of the head of the intermediate billet.
In one embodiment, the temperature sampling of the intermediate billet of the finish rolling inlet further comprises: acquiring second sampling temperatures of a plurality of points of the head of the intermediate blank; and determining a second target temperature of the intermediate blank according to the second sampling temperatures of different points, and performing finish rolling mill rolling force setting calculation on each stand based on the second target temperature, so that the head rolling force and thickness of the finish rolling mill stand strip steel meet the preset precision requirement.
In one embodiment, the preset calculation optimization is performed on the finish rolling temperature of the head of the finish rolling outlet strip steel, the preset optimization is performed on the rolling force of each frame of the finish rolling, the control precision of the thickness of the head of the finish rolling outlet strip steel is further improved, and the preset calculation of the rolling force can be performed based on the temperature of the head of the intermediate billet at the finish rolling inlet. Specifically, after the finish rolling inlet has a steel signal of 1, carrying out preset rolling force calculation, carrying out temperature sampling on the head of the intermediate billet, carrying out temperature sampling without avoiding, obtaining an intermediate billet temperature sampling value (namely a second target temperature) after adopting the measured temperatures of three points of the head of the intermediate billet to carry out weighted average, and carrying out the preset rolling force calculation on each stand of finish rolling, wherein the second target temperature Fet= (Fet1+Fet2+Fet3)/3, and Fet1-3 is the sampling temperature of the three points of the head of the intermediate billet. Of course, the number of the intermediate blank head sampling points can be configured according to the actual precision requirement, and the method is not limited herein.
In one embodiment, the preset precision requirements of the final rolling temperature and thickness of the strip head can be set and adjusted according to the practical application requirements, without limitation.
Based on the technical scheme of the embodiment of the application, when the rolling force is preset and calculated, the temperature of three points of the head of the intermediate billet can reflect the real temperature of the head of the intermediate billet, and when the finish rolling temperature is preset and calculated, the thickness of the intermediate billet is thinned after finish rolling, so that the temperature of one section of the head of the intermediate billet can reflect the real temperature of the head of the intermediate billet, and therefore, the intermediate billet temperature sampling control strategy based on the application can effectively solve the problems that the finish rolling inlet temperature sampling strategy is inaccurate when the finish rolling is preset and calculated for the second time in the existing control method, the accurate head temperature of the intermediate billet cannot be truly reflected when the head finish rolling temperature and the rolling force are preset, the head finish rolling temperature and the rolling force preset precision are lower, the strip threading stability of the finish rolling strip steel and the head thickness dimension accurate control are affected, and the finish rolling outlet strip steel head finish rolling temperature and the rolling force preset precision are effectively improved, and the strip steel head dimension and performance control precision are improved.
Referring to fig. 2, a finish rolling strip steel head quality control apparatus is provided in this embodiment for performing the finish rolling intermediate blank head control method described in the foregoing method embodiment. Since the technical principle of the system embodiment is similar to that of the foregoing method embodiment, the same technical details will not be repeated.
In one embodiment, a finish rolling strip steel head quality control device comprises: the temperature sampling module 20 is configured to sample the temperature of the intermediate billet at the finish rolling inlet after receiving the steel signal at the finish rolling inlet, so as to obtain a plurality of groups of first sampling temperatures, where the temperature sampling is performed within a preset length range by taking the head of the intermediate billet as a starting point; and the finish rolling preset module 21 is configured to determine a first target temperature of the intermediate blank according to the multiple sets of first sampling temperatures, so as to perform setting calculation on the finish rolling outlet strip steel head finish rolling temperature based on the first target temperature, so that the finish rolling outlet strip steel head finish rolling temperature and thickness meet preset precision requirements.
In one embodiment, the apparatus further comprises a steel signal detection module for generating the steel signal when the intermediate billet reaches the preset position of the finish rolling inlet.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (7)
1. The method for controlling the quality of the head of the finish rolling strip steel is characterized by comprising the following steps:
after receiving a steel signal of a finish rolling inlet, performing temperature sampling on an intermediate billet of the finish rolling inlet to obtain a plurality of groups of first sampling temperatures, wherein the temperature sampling is performed within a preset length range by taking the head of the intermediate billet as a starting point;
and determining a first target temperature of the intermediate blank according to the plurality of groups of first sampling temperatures, and performing finish rolling outlet strip steel head finish rolling temperature setting calculation based on the first target temperature, so that the finish rolling outlet strip steel head finish rolling temperature and thickness meet the preset precision requirement.
2. The method according to claim 1, wherein determining the first target temperature of the intermediate billet from the plurality of sets of first sampling temperatures comprises: and carrying out weighted average on the plurality of groups of first sampling temperatures to obtain the first target temperature.
3. The method for controlling the head quality of a finish rolled strip according to claim 1, wherein the temperature sampling of the intermediate billet of the finish rolling inlet further comprises:
acquiring second sampling temperatures of a plurality of points of the head of the intermediate blank;
and determining a second target temperature of the intermediate blank according to the second sampling temperatures of different points, and performing finish rolling mill rolling force setting calculation on each stand based on the second target temperature, so that the head rolling force and thickness of the finish rolling mill stand strip steel meet the preset precision requirement.
4. The method according to claim 3, wherein determining the second target temperature of the intermediate billet from the second sampling temperatures at different points comprises: and carrying out weighted average on the second sampling temperatures of different points to obtain the second target temperature.
5. The method for controlling the quality of the head portion of a finish rolled steel strip according to claim 1, wherein the predetermined length range is within 1.28m from the head portion of the intermediate billet.
6. A finish rolling strip steel head quality control apparatus, comprising:
the temperature sampling module is used for sampling the temperature of the intermediate billet at the finish rolling inlet after receiving the steel signal at the finish rolling inlet to obtain a plurality of groups of first sampling temperatures, wherein the temperature sampling is carried out by taking the head of the intermediate billet as a starting point and sampling within a preset length range;
and the finish rolling preset module is used for determining a first target temperature of the intermediate blank according to the plurality of groups of first sampling temperatures, and performing finish rolling outlet strip steel head finish rolling temperature setting calculation based on the first target temperature so that the finish rolling outlet strip steel head finish rolling temperature and thickness meet preset precision requirements.
7. The apparatus for controlling the head quality of a finish rolled strip according to claim 6, further comprising a steel signal detecting module for detecting that the intermediate billet has reached a predetermined position of the finish rolling inlet, and generating the steel signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311404161.2A CN117340014A (en) | 2023-10-26 | 2023-10-26 | Method and device for controlling quality of head of finish rolling strip steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311404161.2A CN117340014A (en) | 2023-10-26 | 2023-10-26 | Method and device for controlling quality of head of finish rolling strip steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117340014A true CN117340014A (en) | 2024-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311404161.2A Pending CN117340014A (en) | 2023-10-26 | 2023-10-26 | Method and device for controlling quality of head of finish rolling strip steel |
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| Country | Link |
|---|---|
| CN (1) | CN117340014A (en) |
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2023
- 2023-10-26 CN CN202311404161.2A patent/CN117340014A/en active Pending
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