CN114367549A - A kind of bar and wire rod rolling speed detection method - Google Patents
A kind of bar and wire rod rolling speed detection method Download PDFInfo
- Publication number
- CN114367549A CN114367549A CN202210039667.7A CN202210039667A CN114367549A CN 114367549 A CN114367549 A CN 114367549A CN 202210039667 A CN202210039667 A CN 202210039667A CN 114367549 A CN114367549 A CN 114367549A
- Authority
- CN
- China
- Prior art keywords
- speed
- detector
- rolling stock
- wire rod
- bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 238000005096 rolling process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 38
- 238000012937 correction Methods 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 9
- 101100347655 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NAB3 gene Proteins 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
本发明提供了一种棒线材轧件速度检测方法，利用轧辊直径在轧钢过程中不会发生剧烈变化，根据电机转速和轧辊直径计算得出的理论速度可以同比例的反映轧件速度变化的特点，结合现场的检测速度，得出轧件的速度偏差修正系数，在机架的理论速度上进行修正，实现轧件速度的稳定检测，克服轧件速度出现较大偏差导致的生产中断。
The invention provides a method for detecting the speed of a bar and wire rod. The diameter of the roll does not change drastically during the steel rolling process, and the theoretical speed calculated according to the speed of the motor and the diameter of the roll can reflect the change of the speed of the rolling piece in the same proportion. , Combined with the detection speed of the site, the speed deviation correction coefficient of the rolling stock is obtained, and the theoretical speed of the stand is corrected to realize the stable detection of the rolling stock speed and overcome the production interruption caused by the large deviation of the rolling stock speed.
Description
Technical Field
The application belongs to the technical field of electrical automation control, and particularly relates to a method for detecting the speed of a rod and wire rolled piece of a continuous rolling mill.
Background
In a rod and wire continuous rolling production line, the speed of a rolled piece has great influence on stable production, and an operator needs to master the speed range of the rolled piece all the time to guide subsequent related control, such as flying shear control and the like. Generally, the product velocity is derived in two ways, one being the product velocity calculated from the motor speed and the roll diameter, commonly referred to as the product theoretical velocity. Another type of inspection of the head of the product by an in situ inspection element calculates the velocity as a function of the time required to pass a distance, commonly referred to as the inspection velocity of the product.
In practical application, because the diameter of the roller has larger deviation during measurement, a larger error exists between the theoretical speed and the actual speed of the rolled piece, and the actual speed of the rolled piece cannot be truly reflected. But the diameter of the roller can not be changed violently, so that the theoretical speed calculated according to the rotating speed of the motor and the diameter of the roller can reflect the change of the speed of the rolled piece in the same proportion. In the prior application, in order to ensure the relatively accurate speed of the rolled piece, the detection speed detected on site is generally used and is used as the actual speed of the rolled piece after certain correction so as to be used for the relevant control of the subsequent processing flow. The correction mode is to perform weighting processing on the multiple detection speeds. However, this speed detection method has the following problems: in the rolling process, the rotating speed of a motor of the rack can be greatly changed due to adjustment of a loop or other modes, at the moment, the detection speed and the correction value thereof can generate over-amplitude limitation, so that the system correction fails, the actual speed and the detection speed of a rolled piece have large deviation, subsequent control errors such as flying shear shearing and the like are directly caused, and further production interruption is caused.
Therefore, a stable method for detecting the speed of a rolled piece made of a rod wire is needed to accurately detect the speed of the rolled piece, so as to accurately guide the proceeding of the subsequent operation flow.
Disclosure of Invention
The method comprises the steps of calculating the theoretical speed according to the rotating speed of a motor and the diameter of a roller, and reflecting the speed change of a rolled piece in the same proportion.
In a first aspect, an embodiment of the present application provides a method for detecting a speed of a rod and wire rolled piece, which is characterized by comprising the following steps:
A) the method comprises the following steps B) detecting that the rolled piece passes through by the first detector, and otherwise, jumping to A);
B) the method comprises the following steps Acquiring a theoretical speed V2 of the rack;
C) the method comprises the following steps The timer starts to time;
D) the method comprises the following steps E) detecting that the rolled piece passes through by a second detector, and otherwise, skipping D);
E) the method comprises the following steps Stopping timing and simultaneously reading the time T of the rolled piece passing through the first detector1And time T past the second detector2；
F) The method comprises the following steps Calculating the detection speed V1 of the rolled piece according to the time interval of the rolled piece passing through the first detector and the second detector;
G) the method comprises the following steps Calculating to obtain a speed deviation coefficient K1 ═ V1/V2 at the time;
H) the method comprises the following steps K1 is in the allowable range, I) is carried out, otherwise, A) and J) are skipped;
I) the method comprises the following steps Obtaining a speed deviation correction coefficient K through multiple detection weighting calculation;
J) the method comprises the following steps The speed V of the rolled piece is KxV 2;
K) the method comprises the following steps And finishing the detection.
Further, V2 in step J) is the theoretical speed of the gantry.
Further, in the step B), the theoretical speed V2 of the rack is calculated by formula (1); wherein
V2＝n×i×π×D (1)
In formula (1), n: motor speed (unit: rpm);
i: a reduction ratio (coefficient);
d: roll diameter (unit: m).
Further, in the step F), the detection speed V1 of the rolled piece is calculated by a formula (2); wherein
V1＝L/(T2-T1) (2)
In formula (2), L: the distance (unit: m) between the first detector and the second detector.
Further, in the step I), the speed deviation correction coefficient K is calculated by formula (3); wherein
K＝(K1+K2+……+Km)/m (3)
In the formula (3), K1 is the first-order velocity deviation coefficient, and Km is the mth-order velocity deviation coefficient.
In the implementation process, the speed correction coefficient of the rolled piece is obtained by calculating the theoretical speed and combining the field detection speed, the speed deviation correction coefficient K is obtained after the speed correction coefficient is weighted and calculated, and then the theoretical speed of the rack is corrected by using the speed deviation correction coefficient K, so that the stable detection of the speed of the rolled piece is realized.
In the implementation process, the theoretical speed V2 of the rack can be calculated by reading the rotating speed n of the motor, the detection speed V1 of the rolled piece can be calculated by reading the time required by the head of the rolled piece to pass through the first detector and the second detector which are separated by the distance L, and then the ratio of the detection speed V1 to the detection speed V to the second detector is obtained.
Further, in the step H), the allowable range of the speed deviation coefficient is 0.95-1.05 each time.
In the implementation process, the speed deviation coefficient of each time is the ratio of the detection speed of each time to the theoretical speed of each time. The sensed velocity V1 is varied each time due to variations in product throughput velocity. And the roller is worn in the working process, and the rotating speed n of the motor also changes, so that the theoretical speed V2 calculated every time also changes, but does not change violently. If the ratio deviation is too large, the speed deviation correction coefficient K obtained by weighting calculation is influenced, so that some obviously different values need to be chosen. During many practical operations, the inventors have surprisingly found that the speed deviation factor occurs substantially in the range of 0.95 to 1.05, and less frequently less than 0.95 or more than 1.05. To ensure consistency of the weighted calculation data, K values less than 0.95 or greater than 1.05 are discarded and the next V1 and V2 are re-detected and calculated. For the case of the occurrence in the range of 0.95-1.05, the K value of the time is retained, and the speed deviation correction coefficient K is obtained through weighting calculation.
Further, the first detector and the second detector are the same, and one of an infrared CCD detector, a video detector or a hot metal detector is selected.
In a second aspect, the present application provides an application of the above method in speed regulation control of a bar and wire rolling mill.
In a third aspect, the present application provides an application of the method in high-speed flying shear control.
Has the advantages that:
in the implementation process, the invention provides a method for detecting the speed of a rod and wire rolled piece, which utilizes the characteristic that the diameter of a roller does not change violently in the steel rolling process, the theoretical speed obtained by calculation according to the rotating speed of a motor and the diameter of the roller can reflect the speed change of the rolled piece in the same proportion, combines the on-site detection speed to obtain the speed deviation correction coefficient of the rolled piece, corrects on the theoretical speed of a rack, realizes the stable detection of the speed of the rolled piece, and overcomes the production interruption caused by the larger deviation of the speed of the rolled piece.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a timing diagram of product speed detection.
FIG. 2 is a control flow chart of product speed detection.
Wherein, each reference numeral is that S is a roll, HMD1 is a first hot metal detector, HMD2 is a second hot metal detector, and the arrow direction is the rolling direction of the rolled piece.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Examples
With reference to fig. 1-2, the embodiment of the application provides a method for detecting the speed of a rod and wire rolled piece, which is characterized by comprising the following steps:
l): the first hot metal detector HMD1 detects that the rolled piece passes through, B) is carried out, and if not, A) is skipped;
m): acquiring a theoretical speed V2 of the rack S;
n): the timer starts to time;
o): a second hot metal detector HMD2 detects that a rolled piece passes through, and E) is carried out, otherwise, D) is carried out;
p): stopping timing, and simultaneously reading the time T of the rolled piece passing through the first hot metal detector HMD11And a time T of passing through the second hot metal detector HMD22；
Q): according to the time interval (T) of the rolled piece passing through the first hot metal detector HMD1 and the second hot metal detector HMD22-T1) Calculating to obtain the detection speed V1 of the rolled piece;
r): calculating to obtain a speed deviation coefficient K1 ═ V1/V2 at the time;
s): k1 is in the allowable range, I) is carried out, otherwise, A) and J) are skipped;
t): obtaining a speed deviation correction coefficient K through multiple detection weighting calculation;
u): the speed V of the rolled piece is KxV 2;
v): and finishing the detection.
V2 in step J) is the theoretical speed of the gantry.
In the step B), the theoretical speed V2 of the frame is calculated by a formula (1); wherein
V2＝n×i×π×D (1)
In formula (1), n: motor speed (unit: rpm);
i: a reduction ratio (coefficient);
d: roll diameter (unit: m).
In the step F), the detection speed V1 of the rolled piece is calculated by a formula (2); wherein
V1＝L/(T2-T1) (2)
In formula (2), L: the distance (unit: m) between the first detector and the second detector. In the step I), the speed deviation correction coefficient K is calculated by a formula (3); wherein
K＝(K1+K2+……+Km)/m (3)
In the formula (3), K1 is the first-order velocity deviation coefficient, and Km is the mth-order velocity deviation coefficient.
In the step H), the allowable range of the speed deviation coefficient is 0.95-1.05 each time.
During a certain operation the theoretical speed V2 of the frame was 5.26 m/s.
During the detection, the theoretical speed V2 of the acquisition frame is n × i × pi × D, where n is 1000rpm (16.667 rpm/s), i is 0.3, D is 335mm, and the theoretical speed V2 is 5.26 m/s.
The first detector detects that the rolled piece passes through and the second detector detects that the rolled piece passes through, and the recorded time T1 is 0, and T2 is 1.53 s; the distance L between the first and second detectors is 8.4m, and V1L/(T)2-T1) It was 5.49 m/s.
And calculating the speed deviation coefficient K1 of the current time, V1/V2 of the current time, 5.49/5.26 of the current time, and 1.043 of the current time.
K1 is within the allowable range (0.95-1.05), proceed to the next step, otherwise, data is collected again.
The multiple detections result in multiple speed deviation coefficients Km, and the speed deviation correction coefficient K is calculated by weighting (K1+ K2+ … … + Km)/m is 1.041.
And finally, correcting the theoretical speed of the stand by a speed deviation correction coefficient K to obtain the speed of the rolled piece, wherein V is KxV 2 and is 1.041 x 5.26m/s and is 5.475 m/s.
In the implementation process, the speed correction coefficient of the rolled piece is obtained by calculating the theoretical speed and combining the field detection speed, the speed deviation correction coefficient K is obtained after the speed correction coefficient is weighted and calculated, and then the speed deviation correction coefficient K is used for correcting the theoretical speed of the rack, so that the stable detection of the speed of the rolled piece is realized.
In the implementation process, the theoretical speed V2 of the rack can be calculated by reading the rotating speed n of the motor, the detection speed V1 of the rolled piece can be calculated by reading the time required by the head of the rolled piece to pass through the first detector and the second detector which are separated by the distance L, and then the ratio of the detection speed V1 to the detection speed V to the second detector is obtained.
In the implementation process, the speed deviation coefficient of each time is the ratio of the detection speed of each time to the theoretical speed of each time. The sensed velocity V1 is varied each time due to variations in product throughput velocity. And the roller is worn in the working process, and the rotating speed n of the motor also changes, so that the theoretical speed V2 calculated every time also changes, but does not change violently. If the ratio deviation is too large, the speed deviation correction coefficient K obtained by weighting calculation is influenced, so that some obviously different values need to be chosen. During many practical operations, the inventors have surprisingly found that the speed deviation factor occurs substantially in the range of 0.95 to 1.05, and less frequently less than 0.95 or more than 1.05. To ensure consistency of the weighted calculation data, K values less than 0.95 or greater than 1.05 are discarded and the next V1 and V2 are re-detected and calculated. For the case of the occurrence in the range of 0.95-1.05, the K value of the time is retained, and the speed deviation correction coefficient K is obtained through weighting calculation.
Further, in this embodiment, the first detector and the second detector are hot metal detectors, and actually, infrared CCD detectors or video detectors may also be used.
The method for detecting the speed of the rolled piece in the embodiment of the application can be applied to speed regulation control of a rod and wire rolling mill and can also be applied to high-speed flying shear control.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210039667.7A CN114367549A (en) | 2022-01-13 | 2022-01-13 | A kind of bar and wire rod rolling speed detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210039667.7A CN114367549A (en) | 2022-01-13 | 2022-01-13 | A kind of bar and wire rod rolling speed detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114367549A true CN114367549A (en) | 2022-04-19 |
Family
ID=81144991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210039667.7A Pending CN114367549A (en) | 2022-01-13 | 2022-01-13 | A kind of bar and wire rod rolling speed detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114367549A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117463795A (en) * | 2023-12-28 | 2024-01-30 | 东北大学 | A control method for hot-rolled thin strip line flying shear |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3136183A (en) * | 1961-08-29 | 1964-06-09 | Gen Electric | Slowdown control for reversing hot mill |
| CN105327948A (en) * | 2015-11-20 | 2016-02-17 | 广东韶钢松山股份有限公司 | Control method for continuous rolling of wire rods and bars |
| CN106623446A (en) * | 2016-11-29 | 2017-05-10 | 武汉考克利尔工程技术有限公司 | Method for acquiring starting time and ending time of steel coil passing through technology detecting point on hot-cold rolling production line |
| CN106938282A (en) * | 2017-04-13 | 2017-07-11 | 中冶华天工程技术有限公司 | Bar wire rod rolling mill speed-adjusting and control system and method |
| CN112337979A (en) * | 2020-10-16 | 2021-02-09 | 中冶京诚工程技术有限公司 | Bar and wire rod mill control method and device |
| CN113492154A (en) * | 2020-03-20 | 2021-10-12 | 宝山钢铁股份有限公司 | Hot rolling flying shear shearing control method based on multi-speed detection compensation |
-
2022
- 2022-01-13 CN CN202210039667.7A patent/CN114367549A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3136183A (en) * | 1961-08-29 | 1964-06-09 | Gen Electric | Slowdown control for reversing hot mill |
| CN105327948A (en) * | 2015-11-20 | 2016-02-17 | 广东韶钢松山股份有限公司 | Control method for continuous rolling of wire rods and bars |
| CN106623446A (en) * | 2016-11-29 | 2017-05-10 | 武汉考克利尔工程技术有限公司 | Method for acquiring starting time and ending time of steel coil passing through technology detecting point on hot-cold rolling production line |
| CN106938282A (en) * | 2017-04-13 | 2017-07-11 | 中冶华天工程技术有限公司 | Bar wire rod rolling mill speed-adjusting and control system and method |
| CN113492154A (en) * | 2020-03-20 | 2021-10-12 | 宝山钢铁股份有限公司 | Hot rolling flying shear shearing control method based on multi-speed detection compensation |
| CN112337979A (en) * | 2020-10-16 | 2021-02-09 | 中冶京诚工程技术有限公司 | Bar and wire rod mill control method and device |
Non-Patent Citations (1)
| Title |
|---|
| 潘建洲;: "小型棒材线超短尺材自动优化处理技术", 现代经济信息, no. 2015, pages 393 - 394 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117463795A (en) * | 2023-12-28 | 2024-01-30 | 东北大学 | A control method for hot-rolled thin strip line flying shear |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4903528A (en) | System and process for detecting properties of travelling sheets in the cross direction | |
| US3610899A (en) | Method of obtaining variances of a characteristic of a sheet material | |
| JP4792548B1 (en) | Hot rolling equipment and hot rolling method | |
| US20050056067A1 (en) | Methods and apparatus for monitoring and conditioning strip material | |
| JP2001198612A (en) | System for correcting periodic deviation in gage | |
| CN114367549A (en) | A kind of bar and wire rod rolling speed detection method | |
| CN112934982A (en) | Rolling tension adjusting method of rolling mill set and related equipment | |
| CN115283455B (en) | On-line measurement method and system for bar length | |
| CN107020300B (en) | A kind of complex correction device and complex correction method improving coiling machine tracking accuracy | |
| JP2015010960A (en) | Instrument for measuring amount of bend of bar-shaped body | |
| US4257093A (en) | Nominal adaptive control using most recent excursion in a property variation | |
| JP3334091B2 (en) | Roll roll profile measurement method | |
| EP0075944A1 (en) | Control device for successive rolling mill | |
| JPH09323111A (en) | Material tracking device and tracking method in rolling mill | |
| JPH105839A (en) | Method for controlling loop in rolling mill for bar steel and wire rod | |
| CN114798759B (en) | Control method and device for finish rolling side guide plate of continuous casting and rolling production line | |
| WO2023276114A1 (en) | Data collection device | |
| JPH10166016A (en) | Method for measuring forward slip in continuous rolling mill | |
| KR20020052003A (en) | Method for controlling thickness of tandem cold mill | |
| CN113734535A (en) | Control method for section crease falling of double-altitude line rod collection | |
| JPH05139589A (en) | Traveling web controller | |
| RU2245752C1 (en) | Method for controlling strip thickness by means of rolling stand | |
| CN117070740A (en) | Method and device for tracking and calibrating billet of heating furnace | |
| JPH01273535A (en) | Controlling of noodle weight in noodle preparing apparatus | |
| CN115156297A (en) | A high-speed rolling mill steel bite control method and high-speed rolling mill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220419 |
|
| RJ01 | Rejection of invention patent application after publication |