CN-121972517-A - Loop cooperative control method and device for double high-rod production line

CN121972517ACN 121972517 ACN121972517 ACN 121972517ACN-121972517-A

Abstract

The invention discloses a loop cooperative control method and device for a double high-rod production line, wherein the method comprises the steps of acquiring first load data of a main line rolling mill, second load data of a secondary line rolling mill, main line loop high data and secondary line loop high data in the double high-rod production line in real time; the method includes determining a first speed correction amount, correcting a real-time rolling speed of the main line rolling mill, determining a slave state, and correcting the real-time rolling speed of the slave line rolling mill according to the slave state, the first speed correction amount, the second speed correction amount and/or the third speed correction amount. The invention can realize synchronous adjustment of the slave line and the main line in normal state and control effect of independent compensation of the slave line in abnormal state, solves the speed regulation problem of double-line parallel rolling, and avoids the conditions of inconsistent feedback values and speed correction errors of the double lines caused by equipment installation angles, calibration errors and the like.

Inventors

PAN WEI
GUO JUZHONG
LIU DONG
Lv Dingyi
ZHANG DONG
RAN QINGDONG
PENG DAN

Assignees

中冶京诚数字科技(北京)有限公司
中冶京诚工程技术有限公司

Dates

Publication Date: 20260505
Application Date: 20251201

Claims (12)

1. The loop cooperative control method of the double high-rod production line is characterized by comprising the following steps of: acquiring first load data of a main line rolling mill, second load data of a secondary line rolling mill, main line loop height data and secondary line loop height data in a double high-rod production line in real time; determining a first speed correction amount according to the main line loop height data; correcting the real-time rolling speed of the main line rolling mill according to the first speed correction amount; determining a slave state according to a comparison result of the first load data and the second load data and a comparison result of the slave loop height data and a first preset threshold value, wherein the slave state comprises steel drawing, steel piling or normal; When the slave line state is normal, correcting the real-time rolling speed of the slave line rolling mill according to the first speed correction amount; When the slave line state is steel drawing, determining a second speed correction amount according to the first load data, the second load data, a load response intensity factor and a preset time constant, and correcting the real-time rolling speed of the slave line rolling mill according to the first speed correction amount and the second speed correction amount; when the slave state is steel stacking, a third speed correction amount is determined according to the main line loop height data, the slave line loop height data, a preset loop height tolerance threshold value and the first preset threshold value, and the real-time rolling speed of the slave line rolling mill is corrected according to the first speed correction amount and the third speed correction amount.
2. The method of claim 1, wherein determining a slave thread state based on the comparison of the first load data and the second load data and the comparison of the slave thread loop height data and the first preset threshold value comprises: when the comparison result of the secondary wire loop height data and the first preset threshold value is that the secondary wire loop height data is larger than the first preset threshold value, determining that the secondary wire state is pile steel; When the comparison result of the slave wire loop height data and the first preset threshold value is that the slave wire loop height data is not larger than the first preset threshold value, and the comparison result of the first load data and the second load data is that the first load data is smaller than the second load data, determining that the slave wire state is steel drawing; And when the comparison result of the slave line loop height data and the first preset threshold value is that the slave line loop height data is not larger than the first preset threshold value, and the comparison result of the first load data and the second load data is that the first load data is not smaller than the second load data, determining that the slave line state is normal.
3. The method of claim 1, wherein when the slave line condition is a drawn steel, determining a second speed correction amount based on the first load data, the second load data, a load response intensity factor, and a preset time constant, and correcting a real-time rolling speed of the slave line mill based on the first speed correction amount and the second speed correction amount, comprising: when the slave state is steel drawing, determining normalized load data according to the first load data and the second load data; Determining a base second speed correction based on the normalized load data and the load response intensity factor; And according to the preset time constant, exponentially attenuating the basic second speed correction quantity to obtain a second speed correction quantity.
4. The method of claim 3, further comprising, prior to exponentially decaying the base second speed correction based on the preset time constant to obtain a second speed correction: acquiring the rolling speed of the slave line rolling mill in real time; And determining the preset time constant according to the rolling speed and a preset relation table, wherein the preset relation table comprises the rolling speed, the preset time constant and the corresponding relation between the rolling speed and the preset time constant.
5. The method of claim 3, wherein when the slave line condition is a drawn steel, determining a second speed correction amount based on the first load data, the second load data, a load response intensity factor, and a preset time constant, and correcting the real-time rolling speed of the slave line mill based on the first speed correction amount and the second speed correction amount, comprising: when the slave wire state is a drawn steel, determining a second speed correction amount according to the following formula: V tactual =V t ×e -t/τ ; V t =K t ×ln（1+ΔT n ); ΔT n =（T m -T s ）/[0.5×（T m +T s )]; Wherein V tactual is a second speed correction amount, V t is a basic second speed correction amount, T is the current time, τ is a preset time constant, K t is a load response intensity factor, deltaT n is normalized load data, T m is first load data, and T s is second load data.
6. The method of claim 1, wherein when the slave line condition is a stack steel, determining a third speed correction amount based on the master line loop height data, the slave line loop height data, a preset loop height tolerance threshold value, and the first preset threshold value, and correcting a real-time rolling speed of the slave line mill based on the first speed correction amount and the third speed correction amount, comprising: determining a main line and secondary line loop height difference value according to the main line loop height data, the secondary line loop height data, a preset loop height tolerance threshold value and the first preset threshold value; and determining a third speed correction amount according to the difference value of the main line and the secondary line sleeve.
7. The method of claim 6, wherein determining a master slave loop height difference value based on the master loop height data, the slave loop height data, a preset loop height tolerance threshold, and the first preset threshold comprises: Determining a difference value of the heights of the main line and the secondary line sleeves according to the following formula: Δh=max (h set ,h mlfb )-h slfb -h th ; Wherein Δh is a main line secondary loop height difference value, h set is a first preset threshold value, h mlfb is main line loop height data, h slfb is secondary line loop height data, and h th is a preset loop height tolerance threshold value.
8. The method of claim 1, wherein the master line mill is one or more, the slave line mill is one or more, the master line mill is the same number as the slave line mills; When the main line rolling mill and the auxiliary line rolling mill are respectively multiple, determining a first speed correction amount according to the main line loop height data, including: If the main loop height data of one or more main loops are not in the preset loop height range, determining a first speed correction amount according to the main loop height data of the one or more main loops respectively; And correcting the real-time rolling speed of the main line rolling mill positioned at the front end of the corresponding main line loop according to the first speed correction amount, wherein the corrected direction is opposite to the rolling direction of the main line rolling mill.
9. The utility model provides a loop cooperative control device of two high stick production lines which characterized in that includes: The real-time data acquisition module is used for acquiring first load data of a main line rolling mill, second load data of a secondary line rolling mill, main line loop height data and secondary line loop height data in the double high-rod production line in real time; The first speed correction amount determining module is used for determining a first speed correction amount according to the main line loop height data; the first correction module is used for correcting the real-time rolling speed of the main line rolling mill according to the first speed correction quantity; The slave state determining module is used for determining a slave state according to the comparison result of the first load data and the second load data and the comparison result of the slave loop height data and a first preset threshold value, wherein the slave state comprises steel drawing, steel piling or normal state; the second correction module is used for correcting the real-time rolling speed of the slave line rolling mill according to the first speed correction quantity when the slave line state is normal; The system comprises a first correction module, a second correction module, a load regulator and a load regulator, wherein the first correction module is used for determining a first speed correction quantity according to the first load data, the second load data, a load response intensity factor and a preset time constant when the slave line state is steel drawing, and correcting the real-time rolling speed of the slave line rolling mill according to the first speed correction quantity and the second speed correction quantity; and the fourth correction module is used for determining a third speed correction amount according to the main line loop height data, the auxiliary line loop height data, a preset loop height tolerance threshold value and the first preset threshold value when the auxiliary line state is steel stacking, and correcting the real-time rolling speed of the auxiliary line rolling mill according to the first speed correction amount and the third speed correction amount.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 8 when executing the computer program.
11. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the method of any of claims 1 to 8.
12. A computer program product, characterized in that the computer program product comprises a computer program which, when executed by a processor, implements the method of any of claims 1 to 8.

Description

Loop cooperative control method and device for double high-rod production line Technical Field The embodiment of the invention relates to the technical field of loop control, in particular to a loop cooperative control method and device for a double high-rod production line. Background The double high rod production line is a bar production mode which is gradually developed in recent years, a single blank is rolled in sequence, a front rolling mill is shared, and then the single blank is split into two parts for rolling respectively. Fig. 1 is a schematic diagram of a typical process equipment configuration for dual high rod production in the prior art, and as shown in fig. 1, a typical production line arrangement is taken as an example to describe that a qualified billet after heating is rolled in a roughing mill set for 6 passes, and after flying shear heads (tails) of a 1# rolling mill, the billet is rolled in a middle rolling mill set (the first and second rolling mills, a 10# rolling mill and a 11# rolling mill), the billet is rolled in a split stand after being cut and rolled in the middle rolling mill set, and the split stand is a 12# rolling mill in fig. 1, namely, rolling pieces are divided into two rolling pieces of a line A and a line B from an outlet of the 12# rolling mill, and are sent into two lines (the first line A and the second line B) for parallel rolling. Each line was passed through a # 2 fly shear head (tail) and then passed into a pre-finishing mill group for 4 passes. And then the steel is fed into a finishing mill group for rolling for 2-6 times after passing through the head (tail) of the 3# flying shear, and then the steel is fed into a high-speed flying shear for length optimization and sectional shearing, and is cut into multiple lengths suitable for the length of a cooling bed. The 12# rolling mill is also called a bifurcation stand, a single billet is cut into 2 billets after rolling, rolling is performed respectively, and tension adjustment is performed through a loop. For the mass production line, a skilled operator can accurately adjust the blank cutting, the line difference (the cutting from a single blank to 2 blanks and the section difference of the 2 blanks) is generally not more than 3%, and the equivalent part of the production line can be controlled below 2%, namely, the class of 2 rolled pieces after bifurcation is very high, and the rolling load of the rolling mill is correspondingly similar. In actual conditions, due to the reasons of different loop scanning pitch angles, different distances from rolled pieces, calibration errors and the like, when the same physical height is measured, different loop heights fed back to a PLC (Programmable Logic Controller and a programmable logic controller) are different, so that different speed correction amounts are generated, and the 2 different speed correction amounts lead to the introduction of additional and wrong speed interference, amplify the influence of line difference, cause failure of tension control, seriously influence the quality of products, and lead to steel piling accidents of production lines in serious cases. In the prior art, no slave line loop information is considered, but in actual production, the differences of material adjustment, rolling roll gap retraction and the like exist in a main line and a slave line, and the load deviation of a rolling mill is caused by small temperature difference and friction difference, so that the conditions of steel piling or steel pulling are gradually accumulated, and if the slave line loop information is not considered at all, the steel piling and pulling state of the slave line cannot be judged, and serious steel pulling and steel piling accidents are often caused. The prior art for solving the problems is that feedback values of the loops corresponding to two lines are combined, for example, an average value of 2 loop feedback values is taken as loop height feedback to participate in the speed correction calculation of the rolling mill. The method has the defects that the problem of different speed correction amounts caused by inconsistent high feedback of the two wire sleeves is not solved, when a loop scanner on one side is abnormal due to lens deviation and signal interference, the normal side is synchronously influenced, so that the accident is enlarged, the specific difference of the two production lines on the two sides cannot be distinguished by an average algorithm, and in extreme cases, one side is pulled and the other side is piled, so that the quality of products cannot be ensured. Disclosure of Invention The embodiment of the invention provides a loop cooperative control method of a double high-rod production line, which is used for realizing synchronous adjustment of a slave line and a main line in normal state and independent compensation of the slave line in abnormal state, solving the speed regulation problem of double-line parallel rolling and avoi