CN107583958A - It is a kind of to realize that aluminum cold-rolling mill leans on zero control method automatically using roll neck difference - Google Patents
It is a kind of to realize that aluminum cold-rolling mill leans on zero control method automatically using roll neck difference Download PDFInfo
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Abstract
Realize that aluminum cold-rolling mill leans on zero control method automatically using roll neck difference the present invention relates to a kind of.This method rolls force parameter by determining that roller system contacts roll-force and is pressed against, and determines roll gap set-point using roll neck difference：Roll gap set-point is calculated by way of new and old roller system roll neck difference before and after calculating roll change, and gives gap values between rollers twice, i.e. initial roll gap value and secondary gap values between rollers stage by stage；Above-mentioned calculating parameter is then based on, is pressed against automatically.The inventive method improves the production efficiency of milling train, yield rate, avoids the product quality defect caused by pressing and occurs.
Description
Technical field
Realize that aluminum cold-rolling mill leans on zero control method automatically using roll neck difference the present invention relates to a kind of.
Background technology
Current domestic aluminium six-roll cold mill, mainly produces the high strip product of various surface quality requirements.Under normal circumstances,
Change after roll, it is necessary to which two pairs of rollers system carries out demarcation and is pressed against the operation reset again, so as to obtain roll-force, Roll-gap position and the roller that inclines
The zero datum of position.Milling train is pressed against using manual mode, and production efficiency is low, frequently occurs because quality lacks caused by pressing
The generation such as roll marks is fallen into, requirement of the downstream user to great surface quality product (such as company's critical product) can not be met.It is such as domestic
The roller irreversible aluminum single-stand cold-rolling machines of 1850mm six, in actual production, manual mode, efficiency are used always by zero after roll change
It is low.Especially after the product of production great surface quality requirement, frequently there is the abnormal caused mass defect of demarcation, to milling train
The stability of production efficiency and product quality produces very big influence.
Major Difficulties are：
1st, the product of cold-rolling mill production, it is wide to be related to aluminium alloy scope, including the aluminium alloy trade mark 1***, 3***, 5***, 8***
Deng, the different-alloy trade mark and different-thickness are inconsistent on the influence of its surface by zero, and some alloys are abnormal without any surface quality,
But there is surface quality defect, it is necessary to find a kind of technical parameter of compromise in other alloy products, it is applied to difference
Contract product.
2nd, different roller system, roll neck difference are big, it is necessary to find a suitable computation model to be applicable all roller systems；
3rd, because the mill roll cycle is short, often, it is desirable to which automatic pressing speed is fast.
In order to improve production efficiency, yield rate, the product quality defect caused by pressing is avoided to occur, therefore from passing through skill
Art is analyzed and then fully proved, and proposes a kind of technical approach realized using roll neck difference and be pressed against automatically.
The content of the invention
Realize that aluminum cold-rolling mill leans on zero control method, the party automatically using roll neck difference it is an object of the invention to provide a kind of
Method improves the production efficiency of milling train, yield rate, avoids the product quality defect caused by pressing and occurs.
To achieve the above object, the technical scheme is that：It is a kind of to realize that aluminum cold-rolling mill leans on zero automatically using roll neck difference
Control method, comprise the following steps,
S1, determine roller system contact roll-force and be pressed against rolling force parameter：
Roller system contacts roll-force：TContact=TRoller system weight+TBending roller force；
Roll-force is pressed against in roller system：TIt is pressed against=1/2*Tmax；
In formula：TRoller system weightFor the gross weight of upper roller system, upper roller system includes top working roll, upper intermediate calender rolls and top backing up roll, TBending roller force
For the bending roller force sum of top working roll and upper intermediate calender rolls, TmaxFor rolling mill design maximum rolling force；
S2, utilize roll neck difference determination roll gap set-point：Counted by way of new and old roller system roll neck difference before and after calculating roll change
Roll gap set-point is calculated, and gives gap values between rollers twice, i.e. initial roll gap value and secondary gap values between rollers stage by stage：
Initial roll gap value：GInitially=GAct-b；
Secondary gap values between rollers：GIt is secondary=Goffset+(DWR is new-DWR is old)+(DIR is new-DIR is old)+(DBR is new-DBR is old)/2；
In formula：Goffset, b be constant, GActTo roll current roll gap actual value, DWR is newFor new working roll roll neck value, DWR is oldFor
Former working roll roll neck value, DIR is newFor new intermediate calender rolls roll neck value, DIR is oldFor former intermediate calender rolls roll neck value, DBR is newFor new backing roll roll neck value,
DBR is oldFor former backing roll roll neck value；
S3, according to step S1, S2 result of calculation, be pressed against automatically：
(1) G is maderef=GInitially, start the upper system of pressure；
(2) in pressure after system start completion, rolling oil system is opened；
(3) rolling oil system is completed after opening, and under APC patterns, makes Gref=GIt is secondary, it is the pressure upper boom for pressing upper system to continue
In pressure, until TAct=TContact, wherein：GrefTo give gap values between rollers, TActFor actual roll-force, TContactRoll-force is contacted for roller system；
(4) main motor, and given T are startedref=TIt is pressed against, wherein：TrefTo give roll-force, TIt is pressed againstIt is pressed against and rolls for roller system
Power；
(5) after meeting that clearing condition is pressed against in roller system, roll gap correlation values are reset；Wherein, condition is reset：TContact-10T≤
TAct≤TContact+ 10T, and 10S is maintained, those roll gap correlation values are the new base of initial roll gap value and secondary gap values between rollers in step S2
On schedule, that is, the new dead-center position of back roller system is demarcated.
In an embodiment of the present invention, the GoffsetValue is 5000 μm.
Compared to prior art, the invention has the advantages that：The inventive method improve milling train production efficiency,
Yield rate, avoid the product quality defect caused by pressing and occur.
Brief description of the drawings
Fig. 1 is lower roll system roll neck schematic diagram.
Embodiment
Below in conjunction with the accompanying drawings, technical scheme is specifically described.
The a kind of of the present invention realizes that aluminum cold-rolling mill leans on zero control method automatically using roll neck difference, comprises the following steps,
S1, determine roller system contact roll-force and be pressed against rolling force parameter：
Roller system contacts roll-force：TContact=TRoller system weight+TBending roller force；
Roll-force is pressed against in roller system：TIt is pressed against=1/2*Tmax；
In formula：TRoller system weightFor the gross weight of upper roller system, upper roller system includes top working roll, upper intermediate calender rolls and top backing up roll, TBending roller force
For the bending roller force sum of top working roll and upper intermediate calender rolls, TmaxFor rolling mill design maximum rolling force；
S2, utilize roll neck difference determination roll gap set-point：Counted by way of new and old roller system roll neck difference before and after calculating roll change
Roll gap set-point is calculated, and gives gap values between rollers twice, i.e. initial roll gap value and secondary gap values between rollers stage by stage：
Initial roll gap value：GInitially=GAct-b；
Secondary gap values between rollers：GIt is secondary=Goffset+(DWR is new-DWR is old)+(DIR is new-DIR is old)+(DBR is new-DBR is old)/2；
In formula：Goffset(GoffsetValue is 5000 μm), b be constant, GActTo roll current roll gap actual value, DWR is newTo be new
Working roll roll neck value, DWR is oldFor former working roll roll neck value, DIR is newFor new intermediate calender rolls roll neck value, DIR is oldFor former intermediate calender rolls roll neck value, DBR is new
For new backing roll roll neck value, DBR is oldFor former backing roll roll neck value；
S3, according to step S1, S2 result of calculation, be pressed against automatically：
(1) G is maderef=GInitially, start the upper system of pressure；
(2) in pressure after system start completion, rolling oil system is opened；
(3) rolling oil system is completed after opening, and under APC patterns, makes Gref=GIt is secondary, it is the pressure upper boom for pressing upper system to continue
In pressure, until TAct=TContact, wherein：GrefTo give gap values between rollers, TActFor actual roll-force, TContactRoll-force is contacted for roller system；
(4) main motor, and given T are startedref=TIt is pressed against, wherein：TrefTo give roll-force, TIt is pressed againstIt is pressed against and rolls for roller system
Power；
(5) after meeting that clearing condition is pressed against in roller system, roll gap correlation values are reset；Wherein, condition is reset：TContact-10T≤
TAct≤TContact+ 10T, and 10S is maintained, those roll gap correlation values are the new base of initial roll gap value and secondary gap values between rollers in step S2
On schedule, that is, the new dead-center position of back roller system is demarcated.
It is below a specific embodiment of the invention.
As shown in figure 1, a kind of of the present invention realizes that aluminum cold-rolling mill leans on zero control method automatically using roll neck difference, realize such as
Under：
1) determine roller system contact roll-force and be pressed against rolling force parameter：
Preferential, roller system contact roll-force：TContact=TRoller system weight+TBending roller force=80+200*50%=180 tons, take TContact=200
Ton；
Preferential, roll-force is pressed against in roller system：TIt is pressed against=1/2*Tmax=1000 tons, take TIt is pressed against=800 tons.
2) roll gap set-point is determined using roll neck difference：
Roll gap set-point is calculated by way of new and old roller system roll neck difference before and after calculating roll change, contacts and carries to avoid
Efficiency in high pressure, it is designed as amounting to the mode i.e. initial roll gap of given gap values between rollers twice and secondary roll gap stage by stage：
Initial roll gap value
GInitially=GAct- b, it is mainly used in starting the upper system of pressure.
Secondary gap values between rollers
To accelerate to press the upper time, roller system is pressed against certain gap values between rollers (such as 5mm) by the way of quickly depressing, calculate public
Formula is as follows：
GIt is secondary=Goffset+(DWR is new-DWR is old)+(DIR is new-DIR is old)+(DBR is new-DBR is old)/2；
In formula：Goffset(for 5000 μm), b are constant, GActTo roll current roll gap actual value, DWR is newFor new working roll roller
Footpath is worth, DWR is oldFor former working roll roll neck value, DIR is newFor new intermediate calender rolls roll neck value, DIR is oldFor former intermediate calender rolls roll neck value, DBR is newFor new supporting
Roller roll neck value, DBR is oldFor former backing roll roll neck value；
Specific automatic pressing method embodiment：
The first step：Meet pressing condition；
Second step：To certain roller and the parameter such as roller value, Roll-gap position, roll-force of inclining, meeting in roller actual value will
Start the upper system of pressure after asking；
3rd step：System start completion in pressure, open rolling oil system；
4th step：ROLLING OIL is completed after opening, second of given gap values between rollers under APC patterns：Gref=GIt is secondary, continue to make pressure
Upper cylinder half is with small speed pressure, until TAct=TContact(wherein：Gref：Given gap values between rollers, TAct：Actual roll-force, TContact：Roller system contacts
Roll-force)；
6th step：Start main motor, and given pressing roll-force Tref=TIt is pressed against, 800 tons are taken herein ((wherein：Tref：It is given
Roll-force, TIt is pressed against：Roll-force is pressed against in roller system)；
7th step：After meeting that clear zero-zero is pressed against in roller system, to roll gap correlation values (displacement transducer numerical value, roller value of inclining
Deng) reset.
Above is presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, caused function are made
During with scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (2)
1. a kind of realize that aluminum cold-rolling mill leans on zero control method automatically using roll neck difference, it is characterised in that：Comprise the following steps,
S1, determine roller system contact roll-force and be pressed against rolling force parameter：
Roller system contacts roll-force：TContact=TRoller system weight+TBending roller force；
Roll-force is pressed against in roller system：TIt is pressed against=1/2*Tmax；
In formula：TRoller system weightFor the gross weight of upper roller system, upper roller system includes top working roll, upper intermediate calender rolls and top backing up roll, TBending roller force
ForThe bending roller force sum of top working roll and upper intermediate calender rolls,TmaxFor rolling mill design maximum rolling force；
S2, utilize roll neck difference determination roll gap set-point：Roller is calculated by way of new and old roller system roll neck difference before and after calculating roll change
Set-point is stitched, and gives gap values between rollers twice, i.e. initial roll gap value and secondary gap values between rollers stage by stage：
Initial roll gap value：GInitially=GAct-b；
Secondary gap values between rollers：GIt is secondary=Goffset+(DWR is new-DWR is old)+(DIR is new-DIR is old)+(DBR is new-DBR is old)/2；
In formula：Goffset、bFor constant, GActTo roll current roll gap actual value, DWR is newFor new working roll roll neck value, DWR is oldFor former working roll
Roll neck value, DIR is newFor new intermediate calender rolls roll neck value, DIR is oldFor former intermediate calender rolls roll neck value, DBR is newFor new backing roll roll neck value, DBR is oldPropped up for original
Runner roll neck value；
S3, according to step S1, S2 result of calculation, be pressed against automatically：
(1) G is maderef=GInitially, start the upper system of pressure；
(2) in pressure after system start completion, rolling oil system is opened；
(3) rolling oil system is completed after opening, and under APC patterns, makes Gref=GIt is secondary, it is the pressure upper boom pressure for pressing upper system to continue
On, until TAct=TContact, wherein：GrefTo give gap values between rollers, TActFor actual roll-force, TContactRoll-force is contacted for roller system；
(4) main motor, and given T are startedref=TIt is pressed against, wherein：TrefTo give roll-force, TIt is pressed againstRoll-force is pressed against for roller system；
(5) after meeting that clearing condition is pressed against in roller system, roll gap correlation values are reset；Wherein, condition is reset：TContact-10T≤TAct≤
TContact+ 10T, and 10S is maintained, those roll gap correlation values are the new datum mark of initial roll gap value and secondary gap values between rollers in step S2,
Demarcate the new dead-center position of back roller system.
2. it is according to claim 1 it is a kind of using roll neck difference realize aluminum cold-rolling mill automatically lean on zero control method, its feature
It is：The GoffsetValue is 5000 μm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111842504A (en) * | 2020-07-15 | 2020-10-30 | 上海宝立自动化工程有限公司 | Novel cold continuous rolling mill hot strip soft start thickness control method and system |
| CN112170504A (en) * | 2020-09-03 | 2021-01-05 | 河南中孚高精铝材有限公司 | Roll gap calibration control method of large six-roll CVC cold rolling mill |
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| JPS514054A (en) * | 1974-07-01 | 1976-01-13 | Ishikawajima Harima Heavy Ind | |
| CN101091967A (en) * | 2007-08-07 | 2007-12-26 | 攀枝花新钢钒股份有限公司 | On-line roll changing roll gap calibration method for strip steel of rolling mill |
| CN101733289A (en) * | 2009-12-23 | 2010-06-16 | 北京理工大学 | Method for dynamically setting tandem rolling schedule of hot rolling strip |
| CN103567228A (en) * | 2013-09-26 | 2014-02-12 | 燕山大学 | Method for forecasting strip shape and leaning during abnormal rolling of ultrathin strip of six-roller mill |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111842504A (en) * | 2020-07-15 | 2020-10-30 | 上海宝立自动化工程有限公司 | Novel cold continuous rolling mill hot strip soft start thickness control method and system |
| CN112170504A (en) * | 2020-09-03 | 2021-01-05 | 河南中孚高精铝材有限公司 | Roll gap calibration control method of large six-roll CVC cold rolling mill |
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| CN107583958B (en) | 2018-12-18 |
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