CN106623441A - Method for controlling finish rolling roll bending force on tail of hot-rolled strip - Google Patents
Method for controlling finish rolling roll bending force on tail of hot-rolled strip Download PDFInfo
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- CN106623441A CN106623441A CN201611146752.4A CN201611146752A CN106623441A CN 106623441 A CN106623441 A CN 106623441A CN 201611146752 A CN201611146752 A CN 201611146752A CN 106623441 A CN106623441 A CN 106623441A
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- finishing stands
- finishing
- bending roller
- roller force
- stands
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Classifications
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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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention provides a method for controlling finish rolling roll bending force on the tail of a hot-rolled strip. In the process of finish rolling of the tail of the hot-rolled strip, according to the thickness of a finished strip, a rack Fa+1 is selected as the first rack on which locking is started, the roll bending force of finish rolling racks F1-Fa is normally controlled, roll bending force locking is immediately conducted on the finish rolling rack Fa+1 only after tailing-out of the finish rolling rack Fa, a roll bending system on the finish rolling rack Fa+1 only maintains the state in tailing-out of the finish rolling rack Fa and stops outputting a roll blending force adjusting instruction, and the roll bending force of a finish rolling rack behind the finish rolling rack Fa+1 is normally controlled; roll bending force locking is conducted on racks at the rear section in sequence like this until roll bending force locking is conducted on the last rack. The strip shape quality of the tail of the hot-rolled strip is improved, and the stability of production of thin varieties in a hot rolling production line is improved.
Description
Technical field
The present invention relates to hot rolling technique field, more particularly, to a kind of controlling party of the finish rolling bending roller force of hot-strip afterbody
Method.
Background technology
The effect of precision rolling working roll bending roller force is to adjust belt plate shape, improves the flatness and convexity of strip.
Bending roller force is provided by working roll balance system, when in milling train without steel, equilibrant force is presented as, when in milling train
When having steel, bending roller force is presented as, to throw and be converted to equilibrant force again after steel.
Bending roller force size is typically set by second-level model, is carried out bending roller force according to strip profile, plate shape, roll-force and is adjusted automatically
Section, operative employee can manually intervene bending roller force size of the real-time adjustment per frame according to belt plate shape situation in the operation of rolling.
Due to factors such as hot-strip tail temperature, mistakes, cause afterbody plate shape relatively poor, and roll-force increases, because
This is larger in the tail part of band steel bending roller force amplitude of accommodation, and it is prominent to throw easy appearance during steel moment bending roller force is converted to equilibrant force
Right moment increase phenomenon, so as to exacerbate the unstability of tail part of band steel plate shape.
Finish rolling typically has 8 hydraulic cylinder supportings per frame upper working rolls and lower working rolls, there is provided bending roller force and equilibrant force, due to milling train
Interior work under bad environment, is acted on by the mechanical friction of cylinder body itself, and during frequently adjusting up and down at a high speed, multiple hydraulic cylinders exist
Complete Synchronization is difficult to realize during regulation, is differed so as to cause the power being subject on four angles of workroll bearing case moment occur
Cause, strip both sides unbalance stress exacerbates strip running deviation, or even whipping breaks accident.
Therefore, how to optimize the control of the bending roller force of the precision rolling working roll of hot-strip afterbody, improve hot-strip afterbody
Strip shape quality be those skilled in the art's urgent need to resolve technical problem.
The content of the invention
It is an object of the invention to provide a kind of control method of the finish rolling bending roller force of hot-strip afterbody, the control method
The control of the bending roller force of the precision rolling working roll of hot-strip afterbody can be optimized, the strip shape quality of hot-strip afterbody is improved.
To solve above-mentioned technical problem, the technical scheme that the present invention is provided is：
A kind of control method of the finish rolling bending roller force of hot-strip afterbody,
In the finishing stands of tail part of band steel, the bending roller force of F1～Fa finishing stands is normally controlled, and Fa finish rolling
And only Fa+1 finishing stands will immediately be carried out into bending roller force after frame throwing steel to lock, the bending system on Fa+1 finishing stands is only tieed up
Hold state when Fa finishing stands throw steel and stop output bending roller force regulating command, the finishing stand after Fa+1 finishing stands
Bending roller force is normally controlled；
In the same manner, the follow-up Fn-1 finishing stands of Fa finishing stands are thrown after steel, and only Fn finishing stands will immediately be carried out into curved
Roller power lock, the bending system on Fn finishing stands only maintain Fn-1 finishing stands throw steel when state and stop output bending roller force
Regulating command, the bending roller force of the finishing stand after Fn finishing stands is normally controlled；
So until last finishing stand.
Preferably, the finishing stand is a total of six, according to fine-rolling strip steel trend be followed successively by F1, F2, F3, F4, F5 with
And F6 finishing stands.
Preferably, according to hot-rolled finished product belt steel thickness, strip is divided into into five layers other：H≤2.0,2.0 ＜ H≤2.5,2.5
＜ H≤3.0,3.0 ＜ H≤5.0, H ＞ 5.0, the H is finished strip thickness, and unit is mm；
As finished product belt steel thickness H≤2.0mm, the Fa finishing stands are F2 finishing stands；
As the ＜ H of finished product belt steel thickness 2.0≤2.5mm, the Fa finishing stands are F3 finishing stands；
As the ＜ H of finished product belt steel thickness 2.5≤3.0mm, the Fa finishing stands are F4 finishing stands；
As the ＜ H of finished product belt steel thickness 3.0≤5.0mm, the Fa finishing stands are F5 finishing stands；
As finished product belt steel thickness H ＞ 5.0mm, the bending roller force of F1～F6 finishing stands is all normally controlled.
The invention provides a kind of control method of the finish rolling bending roller force of hot-strip afterbody, in the finish rolling of tail part of band steel
Cheng Zhong, the bending roller force of F1～Fa finishing stands is normally controlled, and Fa finishing stands are thrown and incited somebody to action and only by Fa+1 finish rolling after steel
Frame carry out immediately bending roller force locking, the bending system on Fa+1 finishing stands only maintain Fa finishing stands throw steel when state and
Stop output bending roller force regulating command, the bending roller force of the finishing stand after Fa+1 finishing stands is normally controlled；
In the same manner, the follow-up Fn-1 finishing stands of Fa finishing stands are thrown after steel, and only Fn finishing stands will immediately be carried out into curved
Roller power lock, the bending system on Fn finishing stands only maintain Fn-1 finishing stands throw steel when state and stop output bending roller force
Regulating command, the bending roller force of the finishing stand after Fn finishing stands is normally controlled；
So until last finishing stand；
By the control method for developing the locking of hot-strip afterbody finish rolling bending roller force, bending roller force does not lose the strip opened to low temperature
Afterbody is frequently deformed adjustment, it is to avoid deformed area outlet and entrance that tail part of band steel is brought due to bending roller force unusual fluctuations
The relative convexity difference Δ CR in place is widely varied, and does not aggravate the irregular deformation of tail part of band steel, improves the plate of hot-strip afterbody
Form quality amount；Afterbody bending roller force is locked, it is to avoid the asynchronous action of the uneven multiple compensating cylinders of abrasion, workroll bearing case four
Stress is consistent on individual angle, so as to guarantee effect to the uniform force of strip both sides, reduce steel strip tail deviation, whipping accident
It is raw, especially improve the stability of hot rolling producing line Thin Specs variety production.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the one of the present invention
Section Example, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
This application provides a kind of control method of the finish rolling bending roller force of hot-strip afterbody,
In the finishing stands of tail part of band steel, the bending roller force of F1～Fa finishing stands is normally controlled, and Fa finish rolling
And only Fa+1 finishing stands will immediately be carried out into bending roller force after frame throwing steel to lock, the bending system on Fa+1 finishing stands is only tieed up
Hold state when Fa finishing stands throw steel and stop output bending roller force regulating command, the finishing stand after Fa+1 finishing stands
Bending roller force is normally controlled；
In the same manner, the follow-up Fn-1 finishing stands of Fa finishing stands are thrown after steel, and only Fn finishing stands will immediately be carried out into curved
Roller power lock, the bending system on Fn finishing stands only maintain Fn-1 finishing stands throw steel when state and stop output bending roller force
Regulating command, the bending roller force of the finishing stand after Fn finishing stands is normally controlled；
So until last finishing stand.
In one embodiment of the application, the finishing stand is a total of six, is followed successively by according to fine-rolling strip steel trend
F1, F2, F3, F4, F5 and F6 finishing stand.
In one embodiment of the application, according to hot-rolled finished product belt steel thickness, strip is divided into into five layers other：H≤
2.0th, 2.0 ＜ H≤2.5,2.5 ＜ H≤3.0,3.0 ＜ H≤5.0, H ＞ 5.0, the H is finished strip thickness, and unit is mm；
As finished product belt steel thickness H≤2.0mm, the Fa finishing stands are F2 finishing stands；
As the ＜ H of finished product belt steel thickness 2.0≤2.5mm, the Fa finishing stands are F3 finishing stands；
As the ＜ H of finished product belt steel thickness 2.5≤3.0mm, the Fa finishing stands are F4 finishing stands；
As the ＜ H of finished product belt steel thickness 3.0≤5.0mm, the Fa finishing stands are F5 finishing stands；
As finished product belt steel thickness H ＞ 5.0mm, the bending roller force of F1～F6 finishing stands is all normally controlled.
The above-mentioned bending roller force by F1～Fa finishing stands is normally controlled, and normal control herein refers to according to existing
The normal control mode of the bending roller force of the finishing stand in technology is controlled to the bending roller force of F1～Fa finishing stands, herein not
Repeat again.
The method and apparatus of the not detailed description of the present invention is prior art, repeats no more.
For a further understanding of the present invention, a kind of essence of the present invention is provided hot-strip afterbody with reference to embodiment
The control method for rolling bending roller force is described in detail, and protection scope of the present invention is not limited by the following examples.
Embodiment 1
Production finished product thickness is the cold rolling shaping strips of SPHC of 2.75mm, and finish rolling producing line is 6 frames, according to above-mentioned
Control method, due to range intervals of the 2.75mm in the ＜ H of finished product thickness 2.5≤3.0mm, the Fa finishing stands are F4 finish rolling
Frame.
Operating personnel are normally controlled according to the actual tail part of band steel condition of production in scene, the bending roller force of F1～F4 finishing stands
System, the bending roller force of F5～Fn finishing stands is locked successively.After control method use, so after F4 finishing stands throw steel,
And only F5 finishing stands will immediately be carried out into bending roller force to lock, the bending system on F5 finishing stands only maintains F4 finishing stands to throw
State during steel and stop output bending roller force regulating command, now the bending roller force of F6 finishing stands is normally controlled；
In the same manner, F5 finishing stands are thrown after steel, and only F6 finishing stands will immediately be carried out into bending roller force and are locked, F6 finishing stands
Bending system only maintain F5 finishing stands throw steel when state and stop output bending roller force regulating command.
Verified by certain enterprise practical, finished product thickness is that the hot rolling variety production stability of 2.5 ＜ H≤3.0mm substantially increases
By force, finish rolling whipping rate is reduced to 0.23% by original 0.54%, relatively reduces 57% before.
Embodiment 2
Production finished product thickness is the cold rolling shaping strips of SPHC of 2.0mm, and finish rolling producing line is 6 frames, according to above-mentioned
Control method, due to range intervals of the 2.0mm in finished product thickness H≤2.0mm, and the Fa finishing stands are F2 finishing mills
Frame.
Operating personnel are normally controlled according to the actual tail part of band steel condition of production in scene, the bending roller force of F1～F2 finishing stands
System, the bending roller force of F3～F6 finishing stands carries out afterbody locking.After control method use, so after F2 finishing stands throw steel,
And only F3 finishing stands will immediately be carried out into bending roller force to lock, the bending system on F3 finishing stands only maintains F2 finishing stands to throw
State during steel and stop output bending roller force regulating command, now the bending roller force of F4 finishing stands is normally controlled；
After F3 finishing stands throw steel, and only F4 finishing stands will immediately be carried out into bending roller force and locked, on F4 finishing stands
State of bending system when only maintaining F3 finishing stands to throw steel and stop output bending roller force regulating command, now F5 finishing stands
Bending roller force normally controlled；
After F4 finishing stands throw steel, and only F5 finishing stands will immediately be carried out into bending roller force and locked, on F5 finishing stands
State of bending system when only maintaining F4 finishing stands to throw steel and stop output bending roller force regulating command, now F6 finishing stands
Bending roller force normally controlled；
After F5 finishing stands throw steel, and only F6 finishing stands will immediately be carried out into bending roller force and locked, on F6 finishing stands
Bending system only maintain F5 finishing stands throw steel when state and stop output bending roller force regulating command.
Verified by certain enterprise practical, finished product thickness can realize batch steady production for the hot rolling kind of H≤2.0mm,
Finish rolling whipping rate is reduced to 1.07% by original 3.35%, relatively reduces 68% before.
The explanation of above example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that right
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these are improved and modification is also fallen in the protection domain of the claims in the present invention.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
For various modifications of these embodiments are for those skilled in the art it will be apparent that defined herein one
As principle can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will
Will not be intended to be limited to the embodiments shown herein, and be to fit to consistent with principles disclosed herein and features of novelty
Widest range.
Claims (3)
1. a kind of control method of the finish rolling bending roller force of hot-strip afterbody, it is characterised in that
In the finishing stands of tail part of band steel, the bending roller force of F1～Fa finishing stands is normally controlled, and Fa finishing stands
And only Fa+1 finishing stands will immediately be carried out into bending roller force after throwing steel to lock, the bending system on Fa+1 finishing stands only maintains Fa
State and stopping output bending roller force regulating command during finishing stand throwing steel, the roller of the finishing stand after Fa+1 finishing stands
Power is normally controlled；
In the same manner, the follow-up Fn-1 finishing stands of Fa finishing stands are thrown after steel, and only Fn finishing stands will immediately be carried out into bending roller force
Locking, the state when bending system on Fn finishing stands only maintains Fn-1 finishing stands to throw steel and stopping output bending roller force are adjusted
Order, the bending roller force of the finishing stand after Fn finishing stands is normally controlled；
So until last finishing stand.
2. control method according to claim 1, it is characterised in that the finishing stand is a total of six, according to finish rolling
Strip trend is followed successively by F1, F2, F3, F4, F5 and F6 finishing stand.
3. control method according to claim 2, it is characterised in that according to hot-rolled finished product belt steel thickness, strip is divided into
Five layers are other：H≤2.0,2.0 ＜ H≤2.5,2.5 ＜ H≤3.0,3.0 ＜ H≤5.0, H ＞ 5.0, the H is that finished strip is thick
Degree, unit is mm；
As finished product belt steel thickness H≤2.0mm, the Fa finishing stands are F2 finishing stands；
As the ＜ H of finished product belt steel thickness 2.0≤2.5mm, the Fa finishing stands are F3 finishing stands；
As the ＜ H of finished product belt steel thickness 2.5≤3.0mm, the Fa finishing stands are F4 finishing stands；
As the ＜ H of finished product belt steel thickness 3.0≤5.0mm, the Fa finishing stands are F5 finishing stands；
As finished product belt steel thickness H ＞ 5.0mm, the bending roller force of F1～F6 finishing stands is all normally controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146752.4A CN106623441A (en) | 2016-12-13 | 2016-12-13 | Method for controlling finish rolling roll bending force on tail of hot-rolled strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146752.4A CN106623441A (en) | 2016-12-13 | 2016-12-13 | Method for controlling finish rolling roll bending force on tail of hot-rolled strip |
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| CN106623441A true CN106623441A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611146752.4A Pending CN106623441A (en) | 2016-12-13 | 2016-12-13 | Method for controlling finish rolling roll bending force on tail of hot-rolled strip |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109092892A (en) * | 2018-06-20 | 2018-12-28 | 新疆八钢铁股份有限公司 | Prevent the milling method that tail part of band steel is rolled brokenly |
| CN111215454A (en) * | 2018-11-26 | 2020-06-02 | 宝山钢铁股份有限公司 | Method for controlling flat plate shape of hot-rolled strip steel |
| CN111346926A (en) * | 2020-03-03 | 2020-06-30 | 首钢京唐钢铁联合有限责任公司 | Control method for roll bending force of temper mill |
| CN112170502A (en) * | 2020-09-16 | 2021-01-05 | 太原理工大学 | Method for predicting roll bending force in rolling process |
| CN113020281A (en) * | 2021-03-10 | 2021-06-25 | 北京科技大学设计研究院有限公司 | Method for improving tail middle waves of hot-rolled strip steel |
| CN113198850A (en) * | 2021-03-30 | 2021-08-03 | 北京首钢股份有限公司 | Control method and control system of hot rolling finishing mill group and industrial control equipment |
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| CN104785543A (en) * | 2014-01-22 | 2015-07-22 | 宝山钢铁股份有限公司 | Hot rolled strip convexity feedback control method based on moving average filter |
| CN105598181A (en) * | 2016-01-15 | 2016-05-25 | 山西太钢不锈钢股份有限公司 | Control method for tail of hot continuous rolling thin gauge finish rolling strip steel to automatically reduce roller bending force |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109092892A (en) * | 2018-06-20 | 2018-12-28 | 新疆八钢铁股份有限公司 | Prevent the milling method that tail part of band steel is rolled brokenly |
| CN111215454A (en) * | 2018-11-26 | 2020-06-02 | 宝山钢铁股份有限公司 | Method for controlling flat plate shape of hot-rolled strip steel |
| CN111215454B (en) * | 2018-11-26 | 2021-07-16 | 宝山钢铁股份有限公司 | Method for controlling flat plate shape of hot-rolled strip steel |
| CN111346926A (en) * | 2020-03-03 | 2020-06-30 | 首钢京唐钢铁联合有限责任公司 | Control method for roll bending force of temper mill |
| CN112170502A (en) * | 2020-09-16 | 2021-01-05 | 太原理工大学 | Method for predicting roll bending force in rolling process |
| CN113020281A (en) * | 2021-03-10 | 2021-06-25 | 北京科技大学设计研究院有限公司 | Method for improving tail middle waves of hot-rolled strip steel |
| CN113198850A (en) * | 2021-03-30 | 2021-08-03 | 北京首钢股份有限公司 | Control method and control system of hot rolling finishing mill group and industrial control equipment |
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