CN115870352A - Method and system for automatically adjusting plate shape of hot continuous rolling finishing mill - Google Patents
Method and system for automatically adjusting plate shape of hot continuous rolling finishing mill Download PDFInfo
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- CN115870352A CN115870352A CN202211440571.8A CN202211440571A CN115870352A CN 115870352 A CN115870352 A CN 115870352A CN 202211440571 A CN202211440571 A CN 202211440571A CN 115870352 A CN115870352 A CN 115870352A
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Abstract
The invention belongs to the technical field of hot rolled plate strip steel production in the metallurgical industry, and particularly relates to a method and a system for automatically adjusting the plate shape of a hot continuous rolling finishing mill. The method comprises the following steps: calibrating the side guide plate of the finishing mill; setting the opening degree of the side guide plate after calibration; and adjusting the roll gap of the upstream frame according to the counting of the side guide plate magnetic scale of the finishing mill when the strip steel deviates. The system comprises: the device comprises a calibration module, a setting module and an adjusting module; the calibration module is used for calibrating the side guide plate of the finishing mill; the setting module is used for setting the opening degree of the calibrated side guide plate; and the adjusting module is used for adjusting the roll gap of the upstream frame according to the counting of the side guide plate magnetic scale of the finishing mill when the strip steel deviates. According to the invention, the side guide plates are calibrated, the opening degree of the calibrated side guide plates is set, and finally the size of the roll gap is adjusted according to the deformation of the strip steel plate shape, so that the plate shape control precision in the finish rolling process can be effectively improved, the finish rolling plate shape is improved, and the automation and intelligence level of a rolling line are improved.
Description
Technical Field
The invention belongs to the technical field of hot rolled plate strip steel production in the metallurgical industry, and particularly relates to a method and a system for automatically adjusting the plate shape of a hot continuous rolling finishing mill.
Background
Automation and intellectualization of the hot rolling production process are hot spots for industry development. Through continuous development, the automatic steel loading, automatic steel burning, automatic steel tapping, automatic roll changing of finish rolling working rolls and other technologies of the heating furnace are mature day by day, and the automation and intelligence levels of a hot rolling production line are gradually improved. Aiming at the core plate shape control technology in the rolling process, the mainstream technical scheme at present is to judge the plate shape change through a high-speed camera and adjust the roll gap of the rolling mill according to the plate shape change feedback to realize the automatic plate shape adjustment, and the control mode is only mastered by Simmark, north Korea and the like at present and has higher use cost.
In the finish rolling process, the shape of each outlet of the strip steel is mainly observed and adjusted by operators, but the strip steel of the front frame is thick, the shape change is difficult to observe, and if the adjustment has deviation, the strip steel has potential poor shape. In recent years, with the gradual improvement of the process of replacing cold with hot, the market has increasingly increased demand on thin-specification products, when rolling thin specifications, the overall rolling speed is higher, the potential defective plate shape of the front frame can be sharply enlarged on the rear frame, and the rolling is directly rotten or even scrap steel is directly caused in serious conditions, so that the rolling stability is seriously influenced, and meanwhile, the high-quality development demand of a company is not met, so that measures need to be taken to control the potential defective plate shape of the front frame, and the production stability of the thin specifications is ensured by improving the flatness of the plate shape of the front frame.
Through retrieval, the publication number CN112139259B discloses an automatic deviation rectifying control method for finish rolling strip steel, which comprises the following steps: 1) Respectively installing pressure detection devices on two sides of each small vertical roll at the front end of the finishing mill, and detecting the rolling force deviation value of the two sides of each small vertical roll; 2) Presetting upper and lower limits of rolling force deviation values on two sides of a roll gap according to process operation conditions; 3) Detecting actual rolling forces on two sides of a finish rolling small vertical roll; 4) Calculating the rolling force deviation value of the two sides of each fine rolling small vertical roller; 5) Judging whether the deviation value of the rolling force on the two sides of each fine rolling small vertical roller is within the range of the control dead zone, if so, finishing automatic deviation correction, and returning to the previous step; if not, entering the next step; 6) Calculating the roll gap deviation adjustment quantity or the deviation compensation quantity of the fine roll for controlling deviation of each frame; 7) Judging whether the roll gap deviation regulating quantity exceeds the limit, if so, regulating and controlling the roll gap deviation according to the preset upper limit and lower limit of the rolling force deviation value of two sides of the roll gap; if not, entering the next step; 8) Adjusting and controlling the roll gap deviation according to the actually calculated roll gap deviation; 9) And finishing the current round of regulation and control, returning to the step 3), and sequentially carrying out the next round of detection and control process. According to the method, the pressure of the small vertical roll before finish rolling is detected, and the roll gap of the finish rolling mill is adjusted according to the detection result, so that the automatic adjustment of the plate shape is realized. However, the pressure change of the small vertical roll is not only dependent on the shape change of a finish rolling plate, but also influenced by the shape of a rough rolling incoming material, and the pressure deviation of the two sides of the vertical roll is over-limited when the shape of the incoming material is poor, so that the adjustment deviation can exist in the actual process.
Through retrieval, the publication number CN110834033B discloses a strip steel automatic deviation rectification control method of a hot continuous rolling finishing mill group, which comprises the following steps: step one, arranging a strip steel deviation detection device between two adjacent frames of a hot continuous rolling finishing mill group; step two, a strip steel deviation value delta w of a strip steel deviation detection device; step three, calculating a roll gap deviation value delta G of a downstream rack to be adjusted according to the strip steel deviation value delta w; step four, calculating the time T from the detection device to a downstream rack of the strip steel; step five, delaying time T by a frame roll gap control system, and adjusting the roll gap of a downstream frame according to the roll gap deviation value delta G; step six, the strip steel deviation detection device detects a strip steel deviation value delta w at the strip steel deviation detection device, and returns to execute the step three until a downstream rack throws steel; and after the downstream frame throws steel, clearing the roll gap deviation delta G of the downstream frame. The deviation detection device is additionally arranged, the deviation amount of the strip steel is determined through the detection device, and the roll gap of the finishing mill is adjusted based on the deviation amount in a feedback mode, so that the automatic adjustment of the strip shape is realized. Compared with the prior art, the automatic control of the finish rolling plate shape is realized by adding the detection system and the optimization adjustment system, and equipment needs to be improved.
In order to solve the above problems, it is necessary to design a method and a system for automatically adjusting the strip shape of a finishing mill for hot continuous rolling.
Disclosure of Invention
In view of the above problems, the present invention provides a method for automatically adjusting a strip shape of a hot continuous rolling finishing mill, the method comprising:
calibrating the side guide plate of the finishing mill;
setting the opening degree of the side guide plate after calibration;
and adjusting the roll gap of the upstream frame according to the counting of the side guide plate magnetic scale of the finishing mill when the strip steel deviates.
Preferably, the side guide plate consists of an operation side guide plate and a transmission side guide plate;
the side guide plates are driven by a hydraulic cylinder;
the magnetic scale is positioned in the hydraulic cylinder.
Preferably, the calibrating the side guide plate of the finishing mill comprises:
and controlling the centering deviation of the operation side guide plate and the transmission side guide plate of the finishing mill within the range of 2 mm.
Preferably, the setting the opening degree of the calibrated side guide plate includes:
and adjusting the opening degree of the side guide plate of the finishing mill according to the width of the strip steel.
Preferably, the adjusting the roll gap inclination of the upstream frame according to the side guide plate magnetic scale count of the finishing mill when the strip steel deviates comprises the following steps:
when the counting change value of the magnetic ruler of the side guide plate is more than or equal to 3mm and the deviation duration time of the strip steel is more than or equal to 2s, the roll gap inclination of the upstream frame is automatically adjusted;
when the count value of the magnetic ruler of the side guide plate is less than 3mm or the deviation duration time of the strip steel is less than 2s, the roll gap of the upstream frame does not move in an inclined mode.
Preferably, the calculation formula of the adjustment amount for automatically adjusting the roll gap inclination of the upstream frame is as follows:
Y＝-0.001083+0.0097*X-0.000241*X 2 ；
wherein Y represents the adjustment amount, X represents the thickness of the strip steel at the outlet of the current frame, and the value range of X is 1.8-25.4 mm.
The invention also provides a system for automatically adjusting the plate shape of the hot continuous rolling finishing mill, which comprises the following components: the device comprises a calibration module, a setting module and an adjusting module;
the calibration module is used for calibrating the side guide plate of the finishing mill;
the setting module is used for setting the opening degree of the calibrated side guide plate;
and the adjusting module is used for adjusting the roll gap of the upstream frame according to the counting of the side guide plate magnetic scale of the finishing mill when the strip steel deviates.
Preferably, the calibration module is used for calibrating the side guide plate of the finishing mill, and comprises:
the calibration module is used for controlling the centering deviation of the operation side guide plate and the transmission side guide plate of the finishing mill within the range of 2 mm.
Preferably, the setting module is configured to set the opening degree of the side guide after calibration, and includes:
the setting module is used for adjusting the opening degree of the side guide plate of the finishing mill according to the width of the strip steel.
Preferably, the adjusting module is used for adjusting the roll gap of the upstream frame according to the magnetic scale count of the side guide plate of the finishing mill when the strip steel deviates, and comprises:
in the adjusting module, when the counting change value of the magnetic ruler of the side guide plate is more than or equal to 3mm and the deviation duration time of the strip steel is more than or equal to 2s, the roll gap inclination of the upstream frame is automatically adjusted;
in the adjusting module, when the count value of the magnetic ruler of the side guide plate is less than 3mm or the deviation duration time of the strip steel is less than 2s, the roll gap of the upstream frame does not move in an inclined mode.
The invention has the following beneficial effects:
according to the invention, the side guide plates are calibrated, the opening degree of the calibrated side guide plates is set, and finally the size of the roll gap is adjusted according to the deformation of the strip steel plate shape, so that the plate shape control precision in the finish rolling process can be effectively improved, the finish rolling plate shape is improved, the automation and intelligence level of a rolling line is improved, and the high-quality development requirements of steel enterprises are met.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a method for automatically adjusting the strip shape of a hot continuous rolling finishing mill according to an embodiment of the invention;
FIG. 2 is a detailed flow chart of roll gap adjustment of a stand according to a strip steel in the embodiment of the invention;
fig. 3 shows a system diagram of automatic adjustment of the strip shape of the hot continuous rolling finishing mill in the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a method for automatically adjusting a plate shape of a finishing mill for hot continuous rolling, the method comprising: calibrating a side guide plate of a finishing mill, wherein the side guide plate consists of an operation side guide plate and a transmission side guide plate; setting the opening degree of the calibrated side guide plate, wherein the side guide plate is driven by a hydraulic cylinder; and adjusting the roll gap of the upstream frame according to the counting of the magnetic scale of the side guide plate of the finishing mill when the strip steel deviates, wherein the magnetic scale is positioned in the hydraulic cylinder.
The calibrating the side guide plate of the finishing mill comprises the following steps: and controlling the centering deviation of the operation side guide plate and the transmission side guide plate of the finishing mill within the range of 2 mm. The setting of the opening degree of the calibrated side guide plate comprises the following steps: and adjusting the opening degree of the side guide plate of the finishing mill according to the width of the strip steel. Adjusting the roll gap gradient of the upstream rack according to the counting of the side guide plate magnetic scale of the finishing mill when the strip steel deviates comprises the following steps: when the counting change value of the magnetic ruler of the side guide plate is more than or equal to 3mm and the deviation duration time of the strip steel is more than or equal to 2s, the roll gap inclination of the upstream frame is automatically adjusted; when the count value of the magnetic ruler of the side guide plate is less than 3mm or the deviation duration time of the strip steel is less than 2s, the roll gap of the upstream frame does not move in an inclined mode. The roll gap of the upstream frame
2, the calculation formula of the adjustment amount of the automatic tilt adjustment is as follows: y = -0.001083+ 0.0097X-0.000241X; wherein, Y represents the adjustment amount, X represents the thickness of the strip steel at the outlet of the current frame, and the value range of X is 1.8-25.4 mm. In the embodiment, the racks are F1-F4, when the racks are adjusted, the upper limit of F1 adjustment is 0.2mm, the upper limit of F2 adjustment is 0.15mm, the upper limit of F3 adjustment is 0.10mm, the upper limit of F4 adjustment is 0.10mm, and each steel is adjusted at most three times per rack.
As shown in figure 2, the roll gap of the upstream frame is adjusted according to the magnetic scale count of the side guide plate of the finishing mill when the strip steel deviates, when the change value of the magnetic scale count of the side guide plate is more than or equal to 3mm and the deviation duration of the strip steel is more than or equal to 2s, the roll gap of the upstream frame is increased by opening the transmission side or reduced by opening the operation side, the side guide plate of the finishing mill is detected again, and when the count value of the magnetic scale count of the side guide plate is less than 3mm or the deviation duration of the strip steel is less than 2s, the strip steel normally enters the downstream frame.
As shown in fig. 3, the present invention also provides a system for automatically adjusting a strip shape of a finishing mill for hot continuous rolling, the system comprising: the device comprises a calibration module, a setting module and an adjusting module; the calibration module is used for calibrating the side guide plate of the finishing mill; the setting module is used for setting the opening degree of the calibrated side guide plate; and the adjusting module is used for adjusting the roll gap of the upstream rack according to the counting of the side guide plate magnetic scale of the finishing mill when the strip steel deviates.
The calibration module is used for calibrating the side guide plate of the finishing mill, and comprises the following components: the calibration module is used for controlling the centering deviation of the operation side guide plate and the transmission side guide plate of the finishing mill within the range of 2 mm. The setting module is used for carrying out opening degree setting on the side guide plate after calibration, and comprises the following components: the setting module is used for adjusting the opening degree of the side guide plate of the finishing mill according to the width of the strip steel. The adjusting module is used for adjusting the roll gap of the upstream rack according to the counting of the side guide plate magnetic scale of the finishing mill when strip steel deviates, and comprises: in the adjusting module, when the counting change value of the magnetic ruler of the side guide plate is more than or equal to 3mm and the deviation duration time of the strip steel is more than or equal to 2s, the roll gap inclination of the upstream frame is automatically adjusted; in the adjusting module, when the counting value of the magnetic ruler of the side guide plate is less than 3mm or the deviation duration time of the strip steel is less than 2s, the roll gap of the upstream frame is not inclined.
Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, modifications may be made to the technical solutions described in the foregoing embodiments, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for automatically adjusting the shape of a hot continuous rolling finishing mill, which is characterized by comprising the following steps:
calibrating the side guide plate of the finishing mill;
setting the opening degree of the side guide plate after calibration;
and adjusting the roll gap of the upstream frame according to the counting of the side guide plate magnetic scale of the finishing mill when the strip steel deviates.
2. The method for automatically adjusting the strip shape of a hot continuous rolling finishing mill according to claim 1,
the side guide plate consists of an operation side guide plate and a transmission side guide plate;
the side guide plate is driven by a hydraulic cylinder;
the magnetic scale is positioned in the hydraulic cylinder.
3. The method for automatically adjusting the strip shape of a hot continuous rolling finishing mill according to claim 2,
the calibrating the side guide plate of the finishing mill comprises the following steps:
and controlling the centering deviation of the operation side guide plate and the transmission side guide plate of the finishing mill within the range of 2 mm.
4. The method for automatically adjusting the strip shape of a hot continuous rolling finishing mill according to claim 1,
the setting of the opening degree of the side guide plate after calibration comprises the following steps:
and adjusting the opening degree of the side guide plate of the finishing mill according to the width of the strip steel.
5. The method for automatically adjusting the strip shape of a hot continuous rolling finishing mill according to claim 1,
adjusting the roll gap gradient of the upstream rack according to the counting of the side guide plate magnetic scale of the finishing mill when the strip steel deviates comprises the following steps:
when the counting change value of the magnetic ruler of the side guide plate is more than or equal to 3mm and the deviation duration time of the strip steel is more than or equal to 2s, the roll gap inclination of the upstream frame is automatically adjusted;
when the count value of the magnetic ruler of the side guide plate is less than 3mm or the deviation duration time of the strip steel is less than 2s, the roll gap of the upstream frame is not inclined.
6. The method for automatically adjusting the strip shape of a hot continuous rolling finishing mill according to claim 5,
the calculation formula of the adjustment quantity for automatically adjusting the roll gap inclination of the upstream frame is as follows:
Y＝-0.001083+0.0097*X-0.000241*X 2 ；
wherein, Y represents the adjustment amount, X represents the thickness of the strip steel at the outlet of the current frame, and the value range of X is 1.8-25.4 mm.
7. A system for automatically adjusting a strip shape of a finishing block for hot continuous rolling, the system comprising: the device comprises a calibration module, a setting module and an adjusting module;
the calibration module is used for calibrating the side guide plate of the finishing mill;
the setting module is used for setting the opening degree of the calibrated side guide plate;
and the adjusting module is used for adjusting the roll gap of the upstream frame according to the counting of the side guide plate magnetic scale of the finishing mill when the strip steel deviates.
8. The system for automatically adjusting the strip shape of a finishing mill for hot continuous rolling according to claim 7,
the calibration module is used for calibrating the side guide plate of the finishing mill, and comprises:
the calibration module is used for controlling the centering deviation of the operation side guide plate and the transmission side guide plate of the finishing mill within the range of 2 mm.
9. The system for automatically adjusting the strip shape of a finishing mill for hot continuous rolling according to claim 7,
the setting module is used for carrying out opening degree setting on the side guide plate after the calibration, and comprises the following steps:
the setting module is used for adjusting the opening degree of the side guide plate of the finishing mill according to the width of the strip steel.
10. The system for automatically adjusting the strip shape of a finishing mill for hot continuous rolling according to claim 7,
the adjusting module is used for adjusting the roll gap of the upstream rack according to the counting of the side guide plate magnetic scale of the finishing mill when strip steel deviates, and comprises:
in the adjusting module, when the counting change value of the magnetic ruler of the side guide plate is more than or equal to 3mm and the deviation duration time of the strip steel is more than or equal to 2s, the roll gap inclination of the upstream frame is automatically adjusted;
in the adjusting module, when the count value of the magnetic ruler of the side guide plate is less than 3mm or the deviation duration time of the strip steel is less than 2s, the roll gap of the upstream frame does not move in an inclined mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211440571.8A CN115870352A (en) | 2022-11-17 | 2022-11-17 | Method and system for automatically adjusting plate shape of hot continuous rolling finishing mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211440571.8A CN115870352A (en) | 2022-11-17 | 2022-11-17 | Method and system for automatically adjusting plate shape of hot continuous rolling finishing mill |
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| CN115870352A true CN115870352A (en) | 2023-03-31 |
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| CN202211440571.8A Pending CN115870352A (en) | 2022-11-17 | 2022-11-17 | Method and system for automatically adjusting plate shape of hot continuous rolling finishing mill |
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- 2022-11-17 CN CN202211440571.8A patent/CN115870352A/en active Pending
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