CN103028609A - Finishing mill forward slip coefficient control method for eliminating manual intervention speed influence - Google Patents
Finishing mill forward slip coefficient control method for eliminating manual intervention speed influence Download PDFInfo
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- CN103028609A CN103028609A CN2011102932026A CN201110293202A CN103028609A CN 103028609 A CN103028609 A CN 103028609A CN 2011102932026 A CN2011102932026 A CN 2011102932026A CN 201110293202 A CN201110293202 A CN 201110293202A CN 103028609 A CN103028609 A CN 103028609A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 238000004886 process control Methods 0.000 claims abstract description 11
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 230000006870 function Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 241000277275 Oncorhynchus mykiss Species 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention provides a finishing mill forward slip coefficient control method for eliminating the influence of manual intervention speed, which modifies the parameters of a process control model, reduces the loop learning target angle value between the racks of a 2 nd to a 5 th finishing mill by 2 to 3 degrees, and increases the learning amount of the forward slip coefficient when the loop angle is large in the rolling process; meanwhile, a forward slip coefficient learning strategy of the process control model is modified, and when the actually received angle value of the loop between the racks is more than or equal to 15 degrees and less than 25 degrees, the forward slip coefficient is not learned. The invention can effectively eliminate the influence of the manual intervention speed on the forward slip coefficient of the finishing mill, obviously improve the loop control condition, reduce the problem of large loop angle caused by strip steel threading and improve the rolling stability.
Description
Technical field
The invention belongs to the steel rolling automation field, be specifically related to a kind of advancing slip coefficient control method of finishing mill of manually intervening rate of eliminating for the hot-continuous-rolling strip steel process.
Background technology
Find by a large amount of actual rolling data analysis that hot-continuous-rolling strip steel is produced, when band steel head threading in the kink angle control procedure, there is one and is subjected to the operator manually to intervene rate, cause advancing slip learning coefficient to continue to worsen the problem of influence of rolled stability.The reason that problem produces, because the operator has feared cover mostly, before the after-frame finishing mill is stung steel, manually reduce last finishing mill mill speed, cause band steel head kink angle to diminish, usually below 20 °, be lower than the desired value (desired value is 30 °) of kink self study in the process control model, thereby cause the process control model self study reverse, the result of study increases the setting speed of each frame finishing mill, and this is the process of a circulation, be that the operator manually reduces last gantry speed, the band steel be in draw the steel state, cause being with steel head kink angle to diminish, its advancing slip study is reverse, and then cause front rolling mill setting speed to increase, and pulling rate tolerance also increases thereupon, and final result causes advancing slip coefficient to reach lower limit, setting speed has no longer increased, and pulling rate tolerance has also no longer increased a kind of like this state.In this state, as long as the operator does not manually regulate the speed, play large cover and cause the unsettled problem of as-rolled condition with regard to easy appearance band steel.
Summary of the invention
Purpose of the present invention aims to provide a kind of can the elimination operator and manually intervene the control method with the advancing slip coefficient of steel finishing mill of rate, thereby effectively control the kink angle between each frame in advancing slip learning process, improve the rolling stability of finish rolling.
For this reason, the solution taked of the present invention is:
A kind of advancing slip coefficient control method of finishing mill of eliminating manual intervention rate is characterized in that,
1, modification process control model parameter is turned down 2 °～3 ° with kink learning objective angle value between the 2nd～the 5th finishing mill frame, increases the quantity of study of advancing slip coefficient when the kink angle is large in the operation of rolling;
2, the advancing slip coefficient learning strategy of modification process control model, increase arbitration functions, set advancing slip coefficient and do not learn the angle value interval, when the kink angle value is between 〉=15 °～＜25 ° between actual each frame that receives, advancing slip coefficient is not learnt, and it is constant to keep advancing slip coefficient currency.
Beneficial effect of the present invention is:
Before implementing the present invention, add up continuously 133 blocks of 3.25 * 1260mm gauge strip steel, the number of times that occurs kink before adjusting in the different kink control angle situation between the 1st to the 6th finishing mill is as shown in table 1.
Before table 1 is adjusted between the 1st～6th finishing mill kink number of times statistical form appears under the different kink control angles
| Actual kink control angle | ＞30° | ＞35° | ＞40° | ＞45° | ＞50° | ＞55° |
| 1st, go out the kink number of times between 2 frames | 17 | 0 | 0 | 0 | 0 | 0 |
| 2nd, go out the kink number of times between 3 frames | 50 | 27 | 20 | 16 | 10 | 6 |
| 3rd, go out the kink number of times between 4 frames | 46 | 17 | 3 | 3 | 1 | 0 |
| 4th, go out the kink number of times between 5 frames | 31 | 0 | 0 | 0 | 0 | 0 |
| 5th, go out the kink number of times between 6 frames | 8 | 0 | 0 | 0 | 0 | 0 |
After implementing the present invention, add up continuously 157 blocks of 3.25 * 1260mm gauge strip steel, the number of times that occurs kink between the 1st to the 6th finishing mill in the different kink control angle situations is as shown in table 2.
Under the different kink control angles of table 2 the present invention between the 1st～6th finishing mill kink number of times statistical form appears
| Actual kink control angle | ＞30° | ＞35° | ＞40° | ＞45° | ＞50° | ＞55° |
| 1st, go out the kink number of times between 2 frames | 21 | 0 | 0 | 0 | 0 | 0 |
| 2nd, go out the kink number of times between 3 frames | 9 | 0 | 0 | 0 | 0 | 0 |
| 3rd, go out the kink number of times between 4 frames | 16 | 1 | 0 | 0 | 0 | 0 |
| 4th, go out the kink number of times between 5 frames | 21 | 0 | 0 | 0 | 0 | 0 |
| 5th, go out the kink number of times between 6 frames | 2 | 0 | 0 | 0 | 0 | 0 |
By in table 1, the table 2 as seen, when actual kink control angle was between 30 °～35 °, the number of times of not implementing to occur between each frame of the present invention kink was 152 times, the number of times of implementing to occur behind the present invention kink only has 69 times, has reduced 83 times; And when actual kink control angle more than 35 ° the time, the number of times of not implementing to occur between each frame of the present invention kink is 103 times, the number of times of implementing to occur behind the present invention kink only has 1 time.Especially between the 2nd, 3 frames, the number of times of not implementing kink to occur before the present invention is implemented only to occur 9 times behind the present invention up to 129 times, and when actual kink control angle more than 35 ° the time, the number of times that kink occurs still is 79 times, then is 0 time behind enforcement the present invention.This shows that the present invention can effectively eliminate manual intervention speed to the impact of the advancing slip coefficient of finishing mill, significantly improve kink control situation, the large problem of kink angle that causes when reducing with the steel threading improves rolling stability.
The specific embodiment
Embodiment:
The concrete steps that the present invention eliminates the advancing slip coefficient control method of finishing mill of manual intervention rate are:
1, modification process control model parameter is turned down 2 °～3 ° with kink learning objective angle value between the 2nd～the 5th finishing mill frame, increases the quantity of study of advancing slip coefficient when the kink angle is large in the operation of rolling.Design parameter is as shown in table 3.
Table 3 process control model parameter list
| The kink position | L1 | L2 | L3 | L4 | L5 |
| The kink standard angle (°) | 28 | 30 | 30 | 30 | 28 |
| Kink learning objective angle (°) | 28 | 27 | 28 | 28 | 28 |
In the table 3, L1 represents kink between the 1st, 2 frames; L2 represents kink between the 2nd, 3 frames; L3 represents kink between the 3rd, 4 frames; L4 represents kink between the 4th, 5 frames; L5 represents kink between the 5th, 6 frames.
2, the advancing slip coefficient learning strategy of modification process control model, increase arbitration functions, set advancing slip coefficient and do not learn the angle value interval, when kink between actual each frame that receives is that L1～L5 angle value is between 〉=15 °～＜25 ° the time, advancing slip coefficient is not learnt, advancing slip value does not change, and it is constant still to keep currency.
Claims (1)
1. eliminate the advancing slip coefficient control method of finishing mill of manually intervening rate for one kind, it is characterized in that,
(1), modification process control model parameter, kink learning objective angle value between the 2nd～the 5th finishing mill frame is turned down 2 °～3 °, increase the quantity of study of advancing slip coefficient when the kink angle is large in the operation of rolling;
(2), the advancing slip coefficient learning strategy of modification process control model, increase arbitration functions, set advancing slip coefficient and do not learn the angle value interval, when the kink angle value is between 〉=15 °～＜25 ° between actual each frame that receives, advancing slip coefficient is not learnt, and it is constant to keep advancing slip coefficient currency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110293202.6A CN103028609B (en) | 2011-09-30 | 2011-09-30 | Finishing mill forward slip coefficient control method for eliminating manual intervention speed influence |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110293202.6A CN103028609B (en) | 2011-09-30 | 2011-09-30 | Finishing mill forward slip coefficient control method for eliminating manual intervention speed influence |
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| CN103028609A true CN103028609A (en) | 2013-04-10 |
| CN103028609B CN103028609B (en) | 2014-11-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311753A (en) * | 2015-06-29 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Stable control method for large-inertia loop of finish rolling unit for hot continuous rolling |
| CN107433288A (en) * | 2016-05-25 | 2017-12-05 | 宝山钢铁股份有限公司 | It is a kind of based on advancing slip milling train Convenient stable criterion |
| CN108655179A (en) * | 2018-05-31 | 2018-10-16 | 太原晋西春雷铜业有限公司 | Metal plates and strips roll advancing slip control method |
| CN110560488A (en) * | 2019-09-26 | 2019-12-13 | 江苏省沙钢钢铁研究院有限公司 | Control method for improving threading stability of hot-rolled strip steel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106311753A (en) * | 2015-06-29 | 2017-01-11 | 上海梅山钢铁股份有限公司 | Stable control method for large-inertia loop of finish rolling unit for hot continuous rolling |
| CN107433288A (en) * | 2016-05-25 | 2017-12-05 | 宝山钢铁股份有限公司 | It is a kind of based on advancing slip milling train Convenient stable criterion |
| CN107433288B (en) * | 2016-05-25 | 2019-02-05 | 宝山钢铁股份有限公司 | It is a kind of based on advancing slip milling train Convenient stable criterion |
| CN108655179A (en) * | 2018-05-31 | 2018-10-16 | 太原晋西春雷铜业有限公司 | Metal plates and strips roll advancing slip control method |
| CN108655179B (en) * | 2018-05-31 | 2019-08-23 | 太原晋西春雷铜业有限公司 | Metal plates and strips roll advancing slip control method |
| CN110560488A (en) * | 2019-09-26 | 2019-12-13 | 江苏省沙钢钢铁研究院有限公司 | Control method for improving threading stability of hot-rolled strip steel |
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| CN103028609B (en) | 2014-11-05 |
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