CN106862276A - Hot tandem rolling special steel main transmission overload control method - Google Patents
Hot tandem rolling special steel main transmission overload control method Download PDFInfo
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- CN106862276A CN106862276A CN201710066431.1A CN201710066431A CN106862276A CN 106862276 A CN106862276 A CN 106862276A CN 201710066431 A CN201710066431 A CN 201710066431A CN 106862276 A CN106862276 A CN 106862276A
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- Prior art keywords
- overload
- main transmission
- frame
- setting valve
- power down
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Hot tandem rolling special steel main transmission overload control method, belongs to hot-tandem unit main transmission automation field, and it includes（1）It is 2.25*I to hand over system power failure setting valvee, AC-DC-AC system power down setting valve is 1.75*Ie, IeIt is the rated current of frame main transmission；Main transmission overload setting valve is 80% the 90% of power down setting valve；（2）2 4s are reached when the frame overload duration, overload signal is sent out to primary computer, primary computer takes deceleration control algolithm, realize that mm finishing mill unit automatic retarding is controlled, until frame overload signal cancellation, return to conventional main transmission control.This invention removes fine-rolling strip steel afterbody main transmission overload power down failure, the equipment fault time is saved, improve production efficiency, achieved good benefit.
Description
Technical field
The present invention is hot-tandem unit main transmission automation field, is mainly used in rolling load, mill speed big
Strip, including nickel and stainless steel, silicon steel and high-strength steel.
Background technology
Finishing stand main transmission is divided into friendship friendship system and AC-DC-AC system, and different its overload setting valve of system are not
Same, power down setting valve is also different.
As the mill speed that special steel billet increases and thinning brings is improved again, 7 machine frame rolling mills of mm finishing mill unit main transmission
（F0-F6）Electric current also becomes increasing, and especially main transmission overload power down occurs frequently in tail part of band steel.
Due to strip exit temperature at finishing to be ensured, mm finishing mill unit mill speed needs are lasting under normal circumstances accelerates, and one
Denier some external conditions change, and tail part of band steel will result in FM main drive rolling mill overload, when overload continues
Between it is long will produce power down, cause steel scrap between frame to have a strong impact on being normally carried out for rolling line production.
The content of the invention
In order to solve the problems, such as tail part of band steel frame overload not power down steel scrap, so that during ensureing production special steel kind
Not steel scrap between frame, it is ensured that the stability contorting of hot rolling production.
Special steel of the present invention includes nickel and stainless steel, silicon steel and high-strength steel.
Technical scheme：Hot tandem rolling special steel main transmission overload control method, it is characterized in that including following interior
Hold：
（1）It is 2.25*I to hand over system power failure setting valvee, AC-DC-AC system power down setting valve is 1.75*Ie, IeIt is the main biography of frame
The rated current of dynamic system；Main transmission overload setting valve is the 80%-90% of power down setting valve；
（2）When frame main transmission detects its electric current more than overload value, as frame overload；If overload continues
Time reaches 2-4s, and overload signal is sent out to primary computer, and primary computer takes deceleration control algolithm, realizes mm finishing mill unit
Automatic retarding is controlled, and until frame overload signal cancellation, returns to conventional main transmission control；
The deceleration control algolithm is as follows：
Vn = Vn-1- a*TA
Wherein
VnIt is the n-th moment finish rolling mill speed, m/s after overload；
Vn-1It is the (n-1)th moment finish rolling mill speed, m/s after overload；
A subtracts acceleration magnitude, value 0.5-1, m/s for finish rolling2；
TAIt is computer sampling time, value 0.01s.
The primary computer hands over transmission system to use Siemens Company TDC+ using the TDC of Siemens Company
SIMADYN D, hand over orthogonal transmission system to use Siemens Company S150, are used between main transmission and primary computer
Profibus network communication modes realize speed control.
The present invention realizes the stability contorting of hot-rolling finishing mill frame main transmission load when the kinds such as special steel are rolled；Disappear
Except the problem of hot-rolling finishing mill frame tail part of band steel main transmission overload power down, reduce the cancel closedown time and steel scrap is existing
As annual 2580000 yuan or so of the direct economic benefit of acquirement.
Specific embodiment
Implementation process of the present invention is entirely to be automatically obtained in computer program.
When special steel is rolled, according to the overload signal that FM main drive sends, primary computer realizes mm finishing mill unit
Automatic retarding control function, to avoid finish rolling frame main transmission overload power down, meets process control needs.
FM main drive overload value is defined as 89%（Hand over friendship system）、86%（AC-DC-AC system）, the overload duration
It it is 3 seconds, finish rolling subtracts acceleration value for 0.5m/s2。
By taking F0 frame main transmissions as an example：F0 is friendship friendship system and I0eIt is the frame main transmission rated current, therefore frame master is set
Transmission overload value is 2.25*I0e89%, when F0 frame transmission system actual current values reach the frame overload value and continue
When 3 seconds, overload signal just is sent to primary computer, primary computer subtracts acceleration 0.5m/s according to finish rolling2
Realize that automatic retarding control is i.e. automatic and reduce mm finishing mill unit mill speed, so that F0 frame main transmissions electric current is reduced, until the machine
Frame overload blackout, cancels mm finishing mill unit deceleration control, recovers conventional control.
By taking F1 frame main transmissions as an example：F1 is AC-DC-AC system and I1eIt is the frame main transmission rated current, therefore sets and be somebody's turn to do
Frame main transmission overload value is 1.75*I1e86%, when the actual current value of F1 frame transmission systems reaches the frame overload
It is worth and the duration is when 3 seconds, just send overload signal to primary computer, primary computer subtracts acceleration according to finish rolling
0.5m/s2Realize that automatic retarding control is i.e. automatic and reduce mm finishing mill unit mill speed, so that F1 frame main transmissions electric current is reduced, directly
To the frame overload blackout, cancel mm finishing mill unit deceleration control, recover conventional control.
Claims (1)
1. hot tandem rolling special steel main transmission overload control method, it is characterized in that including the description below：
（1）It is 2.25*I to hand over system power failure setting valvee, AC-DC-AC system power down setting valve is 1.75*Ie, IeIt is the main biography of frame
The rated current of dynamic system；Main transmission overload setting valve is the 80%-90% of power down setting valve；
（2）When frame main transmission detects its electric current more than overload value, as frame overload；If overload continues
Time reaches 2-4s, and overload signal is sent out to primary computer, and primary computer takes deceleration control algolithm, realizes mm finishing mill unit
Automatic retarding is controlled, and until frame overload signal cancellation, returns to conventional main transmission control；
The deceleration control algolithm is as follows：
Vn = Vn-1- a*TA
Wherein
VnIt is the n-th moment finish rolling mill speed, m/s after overload；
Vn-1It is the (n-1)th moment finish rolling mill speed, m/s after overload；
A subtracts acceleration magnitude, value 0.5-1, m/s for finish rolling2；
TAIt is computer sampling time, value 0.01s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710066431.1A CN106862276B (en) | 2017-02-07 | 2017-02-07 | Hot tandem rolling special steel main transmission overload control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710066431.1A CN106862276B (en) | 2017-02-07 | 2017-02-07 | Hot tandem rolling special steel main transmission overload control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106862276A true CN106862276A (en) | 2017-06-20 |
| CN106862276B CN106862276B (en) | 2018-09-14 |
Family
ID=59167491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710066431.1A Active CN106862276B (en) | 2017-02-07 | 2017-02-07 | Hot tandem rolling special steel main transmission overload control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06339714A (en) * | 1993-05-31 | 1994-12-13 | Kawasaki Steel Corp | Method for controlling load of driving motor for slab rolling mill |
| JPH10175009A (en) * | 1996-12-13 | 1998-06-30 | Toshiba Corp | Method for controlling thickness in continuous hot rolling mill |
| CN104324952A (en) * | 2014-09-05 | 2015-02-04 | 山西太钢不锈钢股份有限公司 | Control method for load relay of hot continuous rolling thin-specification rolling frame |
| CN104438361A (en) * | 2014-11-13 | 2015-03-25 | 北京科技大学 | Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system |
| CN106253757A (en) * | 2016-08-24 | 2016-12-21 | 中国重型机械研究院股份公司 | Hot-rolling mill high power DC transmission and control system |
-
2017
- 2017-02-07 CN CN201710066431.1A patent/CN106862276B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06339714A (en) * | 1993-05-31 | 1994-12-13 | Kawasaki Steel Corp | Method for controlling load of driving motor for slab rolling mill |
| JPH10175009A (en) * | 1996-12-13 | 1998-06-30 | Toshiba Corp | Method for controlling thickness in continuous hot rolling mill |
| CN104324952A (en) * | 2014-09-05 | 2015-02-04 | 山西太钢不锈钢股份有限公司 | Control method for load relay of hot continuous rolling thin-specification rolling frame |
| CN104438361A (en) * | 2014-11-13 | 2015-03-25 | 北京科技大学 | Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system |
| CN106253757A (en) * | 2016-08-24 | 2016-12-21 | 中国重型机械研究院股份公司 | Hot-rolling mill high power DC transmission and control system |
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| Publication number | Publication date |
|---|---|
| CN106862276B (en) | 2018-09-14 |
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