CN107583958B - It is a kind of to realize that aluminum cold-rolling mill leans on zero control method automatically using roller diameter difference - Google Patents
It is a kind of to realize that aluminum cold-rolling mill leans on zero control method automatically using roller diameter difference Download PDFInfo
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Abstract
Realize that aluminum cold-rolling mill leans on zero control method automatically using roller diameter difference the present invention relates to a kind of.This method, which passes through, determines that roller system contacts roll-force and is pressed against rolling force parameter, and roll gap given value is determined by roller diameter difference: calculating roll gap given value in the way of new and old roller system roller diameter difference before and after calculating roll change, and gap values between rollers twice, i.e. initial roll gap value and secondary gap values between rollers are given stage by stage；It is then based on above-mentioned calculating parameter, is pressed against automatically.The method of the present invention improves the production efficiency of milling train, yield rate, avoids since product quality defect caused by being pressed against occurs.
Description
Technical field
Realize that aluminum cold-rolling mill leans on zero control method automatically using roller diameter difference the present invention relates to a kind of.
Background technique
Current domestic aluminium six-roll cold mill, mainly produces the high strip product of various surface quality requirements.Under normal circumstances,
After replacing roll, need to carry out calibration to roller system again to be pressed against the operation reset, 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, is frequently occurred since quality caused by being pressed against lacks
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) is unable to satisfy.It is such as domestic
Six roller irreversible aluminum single-stand cold-rolling machine of 1850mm uses always manual mode, efficiency by zero after roll change in actual production
It is low.It is frequent the abnormal caused mass defect of calibration occur especially after the product that production great surface quality requires, to milling train
The stability of production efficiency and product quality generates very big influence.
Major Difficulties are:
1, the product of cold-rolling mill production, it is wide to be related to aluminium alloy range, 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, some alloys are abnormal without any surface quality,
But there is surface quality defect in other alloy products, need to find a kind of technical parameter of compromise, make that it is suitable for differences
Contract product.
2, different roller system, roller diameter difference is big, needs to find a suitable computation model to be applicable in all roller systems；
3, since the mill roll period is short, often, it is desirable that automatic pressing speed is fast.
In order to improve the production efficiency, yield rate avoids occurring due to product quality defect caused by being pressed against, passes through skill
Art is analyzed and then is sufficiently proved, and proposes a kind of technical approach realized using roller diameter difference and be pressed against automatically.
Summary of the invention
Realize that aluminum cold-rolling mill leans on zero control method, the party automatically using roller diameter difference the purpose of the present invention is to provide a kind of
Method improves the production efficiency of milling train, yield rate, avoids since product quality defect caused by being pressed against occurs.
To achieve the above object, the technical scheme is that a kind of realize that aluminum cold-rolling mill leans on zero automatically using roller diameter difference
Control method, include the following steps,
S1, it determines roller system contact roll-force and is pressed against rolling force parameter:
Roller system contacts roll-force: TContact=TRoller system weight+TBending roller force；
Roll-force: T is pressed against in roller systemIt is pressed against=1/2*Tmax；
In formula: TRoller system weightFor the total 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 sum of top working roll and the bending roller force of upper intermediate calender rolls, TmaxFor rolling mill design maximum rolling force；
S2, roll gap given value is determined by roller diameter difference: being counted in the way of new and old roller system roller diameter difference before and after calculating roll change
Roll gap given value 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 roller diameter value, DWR is oldFor
Former working roll roller diameter value, DIR is newFor new intermediate calender rolls roller diameter value, DIR is oldFor former intermediate calender rolls roller diameter value, DBR is newFor new backing roll roller diameter value,
DBR is oldFor former backing roll roller diameter value；
S3, according to step S1, S2 calculated result, be pressed against automatically:
(1) G is enabledref=GInitially, the upper system of starting pressure；
(2) in pressure after system start completion, rolling oil system is opened；
(3) rolling oil system is completed after opening, and under APC mode, enables Gref=GIt is secondary, continue the pressure upper boom for making to press system
In pressure, until TAct=TContact, in which: GrefTo give gap values between rollers, TActFor practical roll-force, TContactRoll-force is contacted for roller system；
(4) start main motor, and given Tref=TIt is pressed against, in which: TrefTo give roll-force, TIt is pressed againstIt is pressed against and rolls for roller system
Power；
(5) after meeting roller system pressing clearing condition, roll gap correlation values are reset；Wherein, condition: T is resetContact-10T≤
TAct≤TContact+ 10T, and 10S is maintained, roll gap correlation values are the new benchmark of initial roll gap value and secondary gap values between rollers in step S2
Point demarcates the new dead-center position of back roller system.
In an embodiment of the present invention, the GoffsetValue is 5000 μm.
Compared to the prior art, the invention has the following advantages: the method for the present invention improve milling train production efficiency,
Yield rate is avoided since product quality defect caused by being pressed against occurs.
Detailed description of the invention
Fig. 1 is lower roll system roller diameter schematic diagram.
Specific embodiment
With reference to the accompanying drawing, technical solution of the present invention is specifically described.
It is of the invention it is a kind of realize that aluminum cold-rolling mill leans on zero control method automatically using roller diameter difference, include the following steps,
S1, it determines roller system contact roll-force and is pressed against rolling force parameter:
Roller system contacts roll-force: TContact=TRoller system weight+TBending roller force；
Roll-force: T is pressed against in roller systemIt is pressed against=1/2*Tmax；
In formula: TRoller system weightFor the total 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 sum of top working roll and the bending roller force of upper intermediate calender rolls, TmaxFor rolling mill design maximum rolling force；
S2, roll gap given value is determined by roller diameter difference: being counted in the way of new and old roller system roller diameter difference before and after calculating roll change
Roll gap given value 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 newIt is new
Working roll roller diameter value, DWR is oldFor former working roll roller diameter value, DIR is newFor new intermediate calender rolls roller diameter value, DIR is oldFor former intermediate calender rolls roller diameter value, DBR is new
For new backing roll roller diameter value, DBR is oldFor former backing roll roller diameter value；
S3, according to step S1, S2 calculated result, be pressed against automatically:
(1) G is enabledref=GInitially, the upper system of starting pressure；
(2) in pressure after system start completion, rolling oil system is opened；
(3) rolling oil system is completed after opening, and under APC mode, enables Gref=GIt is secondary, continue the pressure upper boom for making to press system
In pressure, until TAct=TContact, in which: GrefTo give gap values between rollers, TActFor practical roll-force, TContactRoll-force is contacted for roller system；
(4) start main motor, and given Tref=TIt is pressed against, in which: TrefTo give roll-force, TIt is pressed againstIt is pressed against and rolls for roller system
Power；
(5) after meeting roller system pressing clearing condition, roll gap correlation values are reset；Wherein, condition: T is resetContact-10T≤
TAct≤TContact+ 10T, and 10S is maintained, roll gap correlation values are the new benchmark of initial roll gap value and secondary gap values between rollers in step S2
Point demarcates the new dead-center position of back roller system.
The following are a specific embodiments of the invention.
As shown in Figure 1, it is of the invention it is a kind of realize that aluminum cold-rolling mill leans on zero control method automatically using roller diameter difference, realize such as
Under:
1) it determines roller system contact roll-force and is pressed against rolling force parameter:
Preferential, roller system contacts roll-force: TContact=TRoller system weight+TBending roller force=80+200*50%=180 tons, take TContact=200
Ton；
Preferential, roll-force: T is pressed against in roller systemIt is pressed against=1/2*Tmax=1000 tons, take TIt is pressed against=800 tons.
2) roll gap given value is determined using roller diameter difference:
Roll gap given value is calculated by way of new and old roller system roller diameter difference before and after calculating roll change, contacts and mentions to avoid
Efficiency in high pressure 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 is mainly used for starting and presses upper system.
Secondary gap values between rollers
To accelerate to press the upper time, presses against roller system certain gap values between rollers (such as 5mm), 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
Diameter value, DWR is oldFor former working roll roller diameter value, DIR is newFor new intermediate calender rolls roller diameter value, DIR is oldFor former intermediate calender rolls roller diameter value, DBR is newNewly to support
Roller roller diameter value, DBR is oldFor former backing roll roller diameter value；
Specific automatic pressing method implementation:
Step 1: meeting pressing condition；
Step 2: to certain roller and roller value of inclining, the parameters such as Roll-gap position, roll-force are wanted in roller actual value satisfaction
Upper system is pressed in starting after asking；
Step 3: pressing upper system start completion, rolling oil system is opened；
Step 4: ROLLING OIL is completed after opening, second of given gap values between rollers under APC mode: Gref=GIt is secondary, continue to make to press
Upper cylinder half is in small speed pressure, until TAct=TContact(wherein: Gref: given gap values between rollers, TAct: practical roll-force, TContact: the contact of roller system
Roll-force)；
Step 5: starting main motor, and given pressing roll-force Tref=TIt is pressed against, take herein 800 tons ((wherein: Tref: it is given
Roll-force, TIt is pressed against: roll-force is pressed against in roller system)；
Step 6: after meeting the clear zero-zero of roller system pressing, to roll gap correlation values (displacement sensor numerical value, roller value of inclining
Deng) reset.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (2)
1. a kind of realize that aluminum cold-rolling mill leans on zero control method automatically using roller diameter difference, it is characterised in that: include the following steps,
S1, it determines roller system contact roll-force and is pressed against rolling force parameter:
Roller system contacts roll-force: TContact=TRoller system weight+TBending roller force；
Roll-force: T is pressed against in roller systemIt is pressed against=1/2*Tmax；
In formula: TRoller system weightFor the total weight of upper roller system, upper roller system includes top working roll, upper intermediate calender rolls and top backing up roll, TBending roller forceIt is upper
The sum of working roll and the bending roller force of upper intermediate calender rolls, TmaxFor rolling mill design maximum rolling force；
S2, roll gap given value is determined by roller diameter difference: calculating roller in the way of new and old roller system roller diameter difference before and after calculating roll change
Given value 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, b be constant, GActTo roll current roll gap actual value, DWR is newFor new working roll roller diameter value, DWR is oldFor former work
Make roller roller diameter value, DIR is newFor new intermediate calender rolls roller diameter value, DIR is oldFor former intermediate calender rolls roller diameter value, DBR is newFor new backing roll roller diameter value, DBR is oldFor
Former backing roll roller diameter value；
S3, according to step S1, S2 calculated result, be pressed against automatically:
(1) G is enabledref=GInitially, the upper system of starting pressure；
(2) in pressure after system start completion, rolling oil system is opened；
(3) rolling oil system is completed after opening, and under APC mode, enables Gref=GIt is secondary, continue the pressure upper boom pressure for making to press system
On, until TAct=TContact, in which: GrefTo give gap values between rollers, TActFor practical roll-force, TContactRoll-force is contacted for roller system；
(4) start main motor, and given Tref=TIt is pressed against, in which: TrefTo give roll-force, TIt is pressed againstRoll-force is pressed against for roller system；
(5) after meeting roller system pressing clearing condition, roll gap correlation values are reset；Wherein, condition: T is resetContact-10T≤TAct≤
TContact+ 10T, and 10S is maintained, roll gap correlation values are the new datum mark of initial roll gap value and secondary gap values between rollers in step S2, that is, are marked
Determine the new dead-center position of back roller system.
2. it is according to claim 1 it is a kind of using roller diameter difference realize aluminum cold-rolling mill lean on automatically zero control method, feature
It is: the GoffsetValue is 5000 μm.
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| CN111842504B (en) * | 2020-07-15 | 2022-06-07 | 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 |
| CN112170504B (en) * | 2020-09-03 | 2022-05-17 | 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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| CN101733289B (en) * | 2009-12-23 | 2012-07-04 | 北京理工大学 | Method for dynamically setting tandem rolling schedule of hot rolling strip |
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