CN116967292B - Automatic control method for tapping and tilting head of rough rolling slab - Google Patents
Automatic control method for tapping and tilting head of rough rolling slab Download PDFInfo
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- CN116967292B CN116967292B CN202310786679.0A CN202310786679A CN116967292B CN 116967292 B CN116967292 B CN 116967292B CN 202310786679 A CN202310786679 A CN 202310786679A CN 116967292 B CN116967292 B CN 116967292B
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- speed difference
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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
- B21B37/46—Roll speed or drive motor control
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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
- B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
本发明提供了一种粗轧板坯叩翘头自动控制的方法，涉及热轧机技术领域，包括如下步骤：S1、在粗轧机的入口侧和出口侧分别安装红外测温监测仪，所述红外测温监测仪对板坯的叩翘头高度进行数据采样，并将采样数据信号发送至PLC中；S2、所述PLC接收采样数据信号，并根据采样数据信号计算出速度差值；S3、判断速度差值的大小，当速度差值大于水平辊的基础速度值时，控制速度差值作为水平辊的速度值；S4、设定速度差值的运行时间，当运行时间结束后，使水平辊以基础速度值运行；S5、每个轧制道次重复S1～S4，使每个道次红外测温监测仪检测到板坯的叩翘头高度处于标准范围内。本发明对板坯的叩翘头程度进行实时检测，并根据检测结果对叩翘头进行调整，最终达到控制叩翘头的目的。
The present invention provides a method for automatic control of the knocking head of a rough rolling slab, which relates to the technical field of hot rolling mills, and includes the following steps: S1, infrared temperature measuring monitors are respectively installed on the inlet side and the outlet side of the rough rolling mill, and the infrared temperature measuring monitor samples the height of the knocking head of the slab, and sends the sampled data signal to the PLC; S2, the PLC receives the sampled data signal, and calculates the speed difference according to the sampled data signal; S3, judges the size of the speed difference, and when the speed difference is greater than the basic speed value of the horizontal roller, controls the speed difference as the speed value of the horizontal roller; S4, sets the running time of the speed difference, and when the running time ends, the horizontal roller runs at the basic speed value; S5, repeats S1 to S4 for each rolling pass, so that the infrared temperature measuring monitor of each pass detects that the knocking head height of the slab is within the standard range. The present invention performs real-time detection of the knocking head degree of the slab, and adjusts the knocking head according to the detection result, and finally achieves the purpose of controlling the knocking head.
Description
Technical Field
The invention relates to the technical field of hot rolling mills, in particular to a method for automatically controlling the tapping and warping of a rough rolling plate blank.
Background
In the hot rolling production line, a rough rolling area rolling mill regulates and controls the thickness and the width of a slab, rolls into an intermediate billet meeting the technological requirements, and sends the intermediate billet to the next working procedure. In the rolling process, the influence of factors such as speed deviation, plate blank slipping on a roller and the like can be caused by the small difference of elevation of a lower working roller and roller diameter of the roller, so that the head of the plate blank is seriously tilted up or tilted down, and is simply tilted. The impact of the head beating on equipment is huge, if the head beating is too high, the head of a plate blank cannot enter a rolling mill for rolling, steel is piled up due to blocking, so that a vertical roller and guide equipment are damaged, if the head beating occurs on the plate blank, the plate blank can mechanically impact a roller way when the plate blank is conveyed, the surface quality of the roller way is damaged, bolts of a bearing seat are loosened, feet of a motor are loosened, and the motor is burnt out due to vibration. Therefore, it is desired to control the rolling of the slab with a slight tilting head, to reduce the impact on equipment during transportation, and to smoothly bite into the rolling mill for rolling.
At present, the adjustment method for the head beating and tilting of the slab is to manually adjust the degree of head beating and tilting of the slab by visual inspection of production operators, has relatively poor adjustment effect and low adjustment precision, and cannot meet the actual requirements on site. In summary, the above-mentioned needs a set of automatic control system to carry out real-time detection to the kowtow degree of slab to adjust kowtow according to the testing result, finally reach the purpose that the control kowtow was considered.
Disclosure of Invention
In view of the above, the invention aims to provide a method for automatically controlling the tapping and warping of a rough rolling slab, so as to solve the technical problem of adjusting accuracy of the existing slab tapping and warping adjusting method.
The invention adopts the following technical means:
A method for automatically controlling the tapping and warping of a rough rolling plate blank comprises the following steps:
S1, respectively installing infrared temperature measuring monitors at an inlet side and an outlet side of a roughing mill, wherein the infrared temperature measuring monitors adopt an infrared spectrum to sample data of the height of a tilting head of a plate blank, and send sampled data signals to a PLC;
S2, the PLC receives the sampling data signals and calculates a speed difference value according to the sampling data signals;
S3, judging the magnitude of the speed difference, and controlling the speed difference to serve as the speed value of the horizontal roller when the speed difference is larger than the basic speed value of the horizontal roller, and enabling the horizontal roller to operate at the basic speed when the speed difference is smaller than the basic speed of the horizontal roller;
s4, setting the running time of the speed difference value, and enabling the horizontal roller to run at a basic speed value after the running time is finished;
s5, repeating S1-S4 for each rolling pass, and enabling the infrared temperature measuring monitor of each pass to detect the head tilting height of the slab within a standard range.
Further, controlling the speed difference as a speed value of the horizontal roller occurs only on one of the upper horizontal roller or the lower horizontal roller.
Further, the infrared temperature measurement monitor adopts the infrared spectrum to detect, the infrared temperature measurement monitor includes photoelectric detector and sets up in the rotatory drum of inside, be provided with a plurality of reflecting surface on the rotatory drum.
Further, the detection steps of the infrared temperature measurement monitor are as follows:
the reflection surface scans a fixed angle range and generates a pulse signal at the initial position of the scanned angle range;
when the slab is in the scanning area, infrared light radiated by the slab due to high temperature is reflected to the photodetector by the reflecting surface;
The photoelectric detector converts infrared light into an electric signal through photoelectric conversion, and each reflecting surface generates a pulse signal along with the rotation of the rotary drum;
and calculating the head-tilting height of the slab in the scanning angle range according to the time relation generated by the light signal reflected by the rotary drum and the initial pulse signal of the reflection angle.
Further, in S2, the formula for calculating the speed difference from the sampled data signal is as follows:
ΔV=P×h×β×D×π×V Is provided with
Wherein DeltaV is a speed difference value, P is a speed difference value sign, when the slab is tapped, P is negative, when the slab is warped, h is the absolute value of the warped or tapped height of the slab, beta is a self-learned conversion coefficient between the warped height and the speed, D is the diameter of the upper horizontal roller, and V Is provided with is a speed set value of the upper horizontal roller.
Further, the formula is:
β=0.8β1+0.2β′
wherein, beta 1 is the conversion coefficient of the previous period, and beta' is the conversion coefficient between the height of the flick head and the speed;
Further, the method further comprises the steps of setting an upper limit value and a lower limit value of the speed difference value, taking the upper limit value as the speed difference value when the speed difference value is larger than the upper limit value, and taking the lower limit value as the speed difference value when the speed difference value is smaller than the lower limit value.
Compared with the prior art, the invention has the following advantages:
according to the invention, the infrared temperature measuring monitor is arranged to detect the degree of the head turning and the detected value is calculated through the formula disclosed by the invention to obtain the correction speed difference, and the correction speed difference is applied to the horizontal roller way to finish the correction of the head turning and the head turning. The automatic control of the tapping and tilting head is completed through the method, the occurrence of steel clamping accidents of the tapping and tilting head is avoided, and the frequency of manually adjusting the tapping and tilting head of production operators is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the invention provides a method for automatically controlling the tapping and warping of a rough rolling plate blank, which comprises the following steps:
s1, respectively installing infrared temperature measuring monitors on an inlet side and an outlet side of a roughing mill, wherein the infrared temperature measuring monitors sample data of the height of a tilting head of a plate blank and send sampled data signals to a PLC (programmable logic controller), and preferably, a Changzhou Lucheng sensor LS6030 can be adopted in the embodiment.
S2, the PLC receives the sampling data signals and calculates a speed difference value according to the sampling data signals;
The formula for calculating the velocity difference from the sampled data signal is as follows:
ΔV=P×h×β×D×π×V Is provided with
Wherein DeltaV is a speed difference value, P is a speed difference value sign, when the slab is tapped, P is negative, when the slab is warped, h is the absolute value of the warped or tapped height of the slab, beta is a self-learned conversion coefficient between the warped height and the speed, D is the diameter of the upper horizontal roller, and V Is provided with is a speed set value of the upper horizontal roller. Beta ensures that the rotating speed of a horizontal roller on a rolling mill is continuously updated along with the real-time detection result of the knocking and warping of the slab in the rolling process, so that the optimal control of the knocking and warping is realized;
Beta is a value which is updated continuously, and the formula is:
β=0.8β1+0.2β′
Wherein, beta 1 is the conversion coefficient of the previous period, beta 'is the conversion coefficient between the height of the flick head and the speed, and the maximum value of beta' is an integer of 3
H represents the absolute value of the height of the bent or tapped head of the slab, namely, when the detection equipment on two sides of the roughing mill detects different bending heights h of the slab, the conversion coefficient between the corresponding bent height and the corresponding speed is calculated. The degree of the head beating and tilting of the slab is detected in real time through the detecting instrument, the head beating and tilting is adjusted through updating and calculating the adjusting value according to the detection result, and finally the purpose of controlling the head beating and tilting of the slab is achieved.
S3, judging the size of the speed difference, controlling the speed difference to serve as the speed value of the horizontal roller when the speed difference is larger than the basic speed value of the horizontal roller, enabling the horizontal roller to operate at the basic speed when the speed difference is smaller than the basic speed of the horizontal roller, and controlling the speed difference to serve as the speed value of the horizontal roller to only occur on one of the upper horizontal roller and the lower horizontal roller.
Setting an upper limit value and a lower limit value of the speed difference value, taking the upper limit value as the speed difference value when the speed difference value is larger than the upper limit value, and taking the lower limit value as the speed difference value when the speed difference value is smaller than the lower limit value.
S4, setting a speed difference delta V to run in the head tilting time, wherein the running time is T, and after the running time is over, running the horizontal roller at a basic speed value;
s5, repeating S1-S4 for each rolling pass, and enabling the infrared temperature measuring monitor of each pass to detect the head tilting height of the slab within a standard range.
The infrared temperature measuring monitor adopts infrared spectrum to detect, the infrared temperature measuring monitor includes photoelectric detector and sets up in the rotatory drum of inside, be provided with a plurality of reflecting surface on the rotatory drum, can scan a fixed angle in succession, 10 degrees, 30 degrees, 50 degrees. The detection steps of the infrared temperature measuring monitor are as follows:
the reflection surface scans a fixed angle range and generates a pulse signal at the initial position of the scanned angle range;
when the slab is in the scanning area, infrared light radiated by the slab due to high temperature is reflected to the photodetector by the reflecting surface;
The photoelectric detector converts infrared light into an electric signal through photoelectric conversion, and each reflecting surface generates a pulse signal along with the rotation of the rotary drum;
and calculating the head-tilting height of the slab in the scanning angle range according to the time relation generated by the light signal reflected by the rotary drum and the initial pulse signal of the reflection angle.
The working flow of the invention is as follows:
When a slab is transported to an inlet of a roughing mill, an infrared temperature measuring monitor at the inlet side carries out data sampling on the tilting degree of the slab, sampling data are sent to a PLC, the PLC calculates a deviation value of the linear speed of the slab according to the tilting data, the roller diameter of a working roller and the rotating speed of a main motor, whether the slab is put into the roughing mill or not is determined according to input conditions and time limitation, when the slab is rolled out of the roughing mill, the infrared temperature measuring monitor at an outlet of the rolling mill detects the tilting degree of the slab again and carries out revision compensation on the next pass, and the fact that the head of the slab is slightly tilted after the roughing mill is rolled is ensured. Before, an operator is required to judge the degree of the head beating and tilting, and then the rough rolling upper horizontal roller is accelerated or decelerated so as to achieve the purpose of controlling the head beating and tilting of the slab. Compared with the prior manual adjustment, the hit rate and the control precision of head control are greatly improved, and the working efficiency of operators is effectively improved.
The invention reduces the accident time, namely, the production is influenced by 1 tap-tilting steel clamping accident per 2 years, the hour yield is 575 tons, the benefit of 571 yuan per ton steel is calculated according to one time per 4 years, and the effect is 22 x 575 x 571/2= 361.16 yuan.
The invention reduces the frequency of manually adjusting the flick head of the production operator and improves the working efficiency by 77.6 percent.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (4)
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| CN202310786679.0A CN116967292B (en) | 2023-06-29 | 2023-06-29 | Automatic control method for tapping and tilting head of rough rolling slab |
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| CN202310786679.0A CN116967292B (en) | 2023-06-29 | 2023-06-29 | Automatic control method for tapping and tilting head of rough rolling slab |
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| JP2013240829A (en) * | 2012-04-27 | 2013-12-05 | Nippon Steel & Sumitomo Metal Corp | Device for guiding threading on hot rolling line |
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| JP3277037B2 (en) * | 1993-07-30 | 2002-04-22 | 川崎製鉄株式会社 | Continuous hot rolling of billets |
| DE69637428T2 (en) * | 1995-12-26 | 2009-02-19 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Method for measuring strip profile and method for controlling continuous rolls |
| JP4090560B2 (en) * | 1998-03-30 | 2008-05-28 | 日新製鋼株式会社 | Rolling mill control method using horizontal rolling device for rough rolling mill work roll |
| JP3828767B2 (en) * | 2001-03-22 | 2006-10-04 | 新日本製鐵株式会社 | Sheet rolling method |
| CN102836883B (en) * | 2011-06-23 | 2014-08-20 | 宝山钢铁股份有限公司 | Control method for upward and downward head bending of plate blank |
| CN103752622B (en) * | 2013-12-23 | 2016-08-24 | 宝山钢铁股份有限公司 | A kind of heavy plate rolling control method eliminating strand edge fault |
| JP6350747B2 (en) * | 2016-06-27 | 2018-07-04 | 新日鐵住金株式会社 | Shape measuring apparatus and shape measuring method |
| CN112165996B (en) * | 2018-05-22 | 2022-07-29 | 东芝三菱电机产业系统株式会社 | Industrial complete equipment monitoring control system |
| JP2020158841A (en) * | 2019-03-27 | 2020-10-01 | Ｊｘ金属株式会社 | Rolled copper foil coil |
| CN112007950B (en) * | 2019-05-31 | 2022-07-15 | 上海梅山钢铁股份有限公司 | Rolling method of bundle strip steel with tensile strength of 500MPa |
| CN212216611U (en) * | 2020-05-14 | 2020-12-25 | 中冶京诚工程技术有限公司 | Strip descaling production line |
| CN115121628A (en) * | 2022-07-01 | 2022-09-30 | 湖南华菱涟源钢铁有限公司 | Method for automatically adjusting warping and buckling head of plate blank and rough rolling device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920270A (en) * | 2009-06-12 | 2010-12-22 | 宝山钢铁股份有限公司 | Device and method for detecting and controlling tilting buckle head of band steel in rough rolling process |
| JP2013240829A (en) * | 2012-04-27 | 2013-12-05 | Nippon Steel & Sumitomo Metal Corp | Device for guiding threading on hot rolling line |
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