CN103909097B - The method that after eliminating milling train roll shifting, roll-force fluctuates - Google Patents
The method that after eliminating milling train roll shifting, roll-force fluctuates Download PDFInfo
- Publication number
- CN103909097B CN103909097B CN201310005466.6A CN201310005466A CN103909097B CN 103909097 B CN103909097 B CN 103909097B CN 201310005466 A CN201310005466 A CN 201310005466A CN 103909097 B CN103909097 B CN 103909097B
- Authority
- CN
- China
- Prior art keywords
- roll shifting
- roll
- shifting
- distance
- force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
Present invention is disclosed and a kind of eliminate the method for roll-force fluctuation after milling train roll shifting, comprise the following steps: receive the roll shifting amount of band steel, roll shifting L1 directly sets roll shifting to setting position according to roll shifting L2, roll shifting L1 first alters the first distance to active side more, return to transmission side again after completing Deng location and alter the first distance, be eventually returned to setting position.Have employed technical scheme, when equipment state can be overcome to change, the impact on roller system vertical direction size of the roll shifting direction, eliminate on different roll shifting direction actual achievement roll-force or the jump of rolling force deviation or fluctuation, guarantee the steady of the stable of rolling force model self study and threading, the relative position making roller system, device is substantially stationary, and actual roll-force is the least with the forecast departure of rolling force model, it is ensured that stablizing of the operation of rolling.
Description
Technical field
The present invention relates to steel rolling automatic control technology, eliminate milling train roll shifting more particularly, it relates to a kind of
The method of rear roll-force fluctuation.
Background technology
The version of conventional hot fine rolling unit mainly includes that Plain four high rolling mill, PC(intersect) roll
Machine and roll shifting milling train, wherein roll shifting milling train includes CVC and WRS(plain-barreled roll transmission) two kinds, CVC
Milling train is primarily to control panel convexity or plate shape, and its working roll is generally with certain roll shape, WRS
The working roll of milling train is typically plain-barreled roll, and it, primarily to the edge abrasion of homogeneous roll, reduces band steel
Edge drops, and improves the section configuration of band steel, improves with wide milimeter number.
As it is shown in figure 1, roll shifting milling train is upper working rolls and lower working rolls play, supports roller and do not alter.At a meter
In drawing, often roll after one block of steel upper working rolls and lower working rolls can play a certain amount W1 in the opposite direction, when upper
Roller play is reversely altered to transmission side again after active side extreme position, upper and lower work after the most often rolling one block of steel
Make the roller play certain distance round about by symmetry, so circulate play, when preventing with wide rolling
Steel edge portion always weares and teares a fixed position.
Working roll roll shifting be conducive to eliminate working roll ladder wear phenomenon, it is ensured that roll (especially with
The marginal portion of steel edge portion contact) uniform wear, improve crown of strip, improve rolling public affairs
Mileage, the plan arranged mode for free rolling creates conditions.
In the case of with wide rolling, if not roll shifting, then roll edge abrasion ratio is more serious, and edge
Abrasion shape is precipitous；If using the mode of roll shifting, then edge abrasion ratio is shallower.The roller of not roll shifting
The band steel edge fall that type shuts out is very big, and the edge of the band steel that the roll shape of roll shifting shuts out fall is less.So
In order to ensure the uniform wear of roll edge, reduce the degree of band steel edge fall, typically afer bay is adopted
It is designed by the mode of flat roller play.
The problem that prior art exists:
Although roll shifting has a lot of benefit, but owing to the play of steel rolling interval work roller can cause equipment state
Change, and rolling instability may be ultimately resulted in, cause steel scrap or the quality accident such as roll brokenly.
According to existing design, the roll shifting of roll shifting milling train is working roll play, supports roller and does not alters.Work
Make the play of roller and be dependent on being arranged on what the roll shifting oil cylinder of milling train active side was driven.Roll shifting oil cylinder
Position is as shown in Figure 1:
In FIG, working roll has the equilibrant force of about about 40 tons with supporting roller contact position, works as work
When making roller play, owing to supporting the effect of frictional force between roller and working roll, working roll can drive support
Roller is slightly partial to the direction of working roll play.
In order to be conducive to carrying out the regulation of roll gap, the upper backup roll of milling train is designed with ladder backing plate, by
In supporting, the working environment of ladder backing plate on roller is relatively more severe, and dust stratification ratio is more serious and there is uneven mill
Damage, make milling train accuracy guarantee ability in vertical direction poor.
Roll-force and rolling when dirt on upper ladder backing plate and uneven wear etc. will cause roll shifting
Power deviation occurs abnormal.
As shown in Figures 2 and 3, in, the factor such as uneven wear due to upper ladder backing plate may be led
Situation during supporting roller bearing seat and upper ladder backing plate present in Fig. 3 the 3 of a, b, c when causing roll shifting.
Due to uneven wear and the impact of dirt of ladder backing plate, a and c is in vertical direction to roll gap
Impact dramatically different, when working roll play direction is reverse, supporting roller bearing seat and ladder backing plate
Between contact condition will be become the state of c from the state of a, or become the shape of a from the state of c
State, the change of different conditions occurs causing the actual vertical dimension between roll shifting two blocks of steel the most front and back
Change, and the sudden change eventually affecting both sides roll gap causes actual roll-force and rolling force deviation to occur
Exception or fluctuation, affect the stable of milling train and the study of rolling force model.
The position of roll shifting is inconspicuous on the impact of actual roll-force, but roll shifting direction and actual roll-force
Correlation is stronger, actual roll-force difference about about 20% on different roll shifting directions.Whenever roll shifting
Time reversely, actual roll-force will be undergone mutation, rolling force model in order to adapt to the sudden change of actual roll-force,
Carry out the most periodically self study, thus result in the cyclic swing of rolling force model self study coefficient.
So whenever roll shifting opposite direction, the forecast departure of rolling force model is very big, set amount is relatively big, and rolling is steady
Qualitative very poor, add and roll brokenly or the risk of steel scrap.
On the other hand, after roll shifting reversely, due to the contact surface between supporting roller bearing seat and ladder backing plate
There is the biggest uncertainty in state, sometimes also results in both sides rolling force deviation and occur abnormal.
When roll shifting is altered to transmission side, the rolling force deviation between active side and transmission side is less, and works as
Roll shifting is when active side is altered, and the rolling force deviation between active side and transmission side is relatively big, rolling stability
Poor, the accidents such as sideslip steel scrap easily occur.
Owing to the production environment of hot rolling is relatively severe, the structure of ladder backing plate is the most complicated simultaneously,
Replacement cycle is longer, so the state of ladder backing plate will produce the biggest adverse effect to stability,
The method that must take other is mitigated or eliminated.
Summary of the invention
The purpose of the present invention aims to provide a kind of method that after eliminating milling train roll shifting, roll-force fluctuates, and solves
Certainly various deficiencies present in prior art.
According to the present invention, it is provided that a kind of eliminate the method for roll-force fluctuation after milling train roll shifting, including following step
It is rapid: receiving the roll shifting amount of band steel, roll shifting L1 is directly set to roll shifting setting position according to roll shifting L2,
Roll shifting L1 first alters the first distance to active side more, return to transmission side again after waiting location to complete alter first away from
From, it is eventually returned to setting position.
Above-mentioned L1 is carried out roll shifting, and L2 is to set roll shifting, and roll shifting process is to be set roll shifting by L2,
L1 performs roll shifting.
According to one embodiment of the invention, set roll shifting L2 roll shifting critical distance as ± (200-first away from
From) mm.
According to one embodiment of the invention, when roll shifting L2 roll shifting critical distance for more than (200-first away from
From) mm or during less than-(200-the first distance) mm, roll shifting L1 is automatically by roll shifting distance correction
For ± (200-the first distance) mm.
According to one embodiment of the invention, it is judged that the sign of the actual value-setting value of roll shifting.Actual value
-setting value>0, set actual value and be equal to setting value,<0, setting actual value is equal to actual value-setting value
Setting value the+the first distance.
According to one embodiment of the invention, actual value is equal to setting value, roll shifting is set to setting position.
According to one embodiment of the invention, actual value is equal to setting value the+the first distance, by roll shifting L1 first
Alter first distance to active side more, and wait the very first time, wait location to return to transmission side again after completing
Alter the first distance.
Have employed technical scheme, when equipment state can be overcome to change, roll shifting direction
Impact on roller system vertical direction size, eliminates actual achievement roll-force or roll-force on different roll shifting direction
The jump of deviation or fluctuation, it is ensured that the stable and threading of rolling force model self study steady, make roller system
The relative position of equipment is substantially stationary, and actual roll-force is the least with the forecast departure of rolling force model, really
Protect stablizing of the operation of rolling.
Accompanying drawing explanation
In the present invention, identical reference represents identical feature all the time, wherein:
Fig. 1 is existing roll shifting operation roll of mill play schematic diagram；
Fig. 2 is that roll shifting direction affects schematic diagram to actual roll-force；
Fig. 3 is the partial enlarged drawing at the A shown in Fig. 2；
Fig. 4 is the schematic diagram of milling train roll shifting of the present invention；
Fig. 5 is the flow chart of the method that roll-force fluctuates after the present invention eliminates milling train roll shifting；
Fig. 6 is roll shifting direction and actual roll-force and rolling force deviation before and after the method optimizing of roll shifting location
Between relativity.
Detailed description of the invention
Technical scheme is further illustrated below in conjunction with the accompanying drawings with embodiment.
In order to overcome the impact on vertical direction size of the roll shifting direction, the roll shifting shown in Fig. 4 can be used
Location mode, as shown in Figure 4, when roll shifting sets and alters to transmission side (a), then roll shifting L1 is direct
Roll shifting is set to setting position according to roll shifting L2；When roll shifting sets and alters to active side (b), then alter
Roller L1 first alters Lmm to active side more, returns to transmission side again and alters Lmm, finally return after waiting location to complete
To the roll shifting position set.Owing to the mechanical limit position of roll shifting is ± 200mm, if roll shifting L2
When setting roll shifting position as ± 200mm, then the actual roll shifting position of roll shifting L1 is up to (200+L)
Mm, the equipment of may result in blocks, so limiting the roll shifting L2 roll shifting limit is ± (200-L) mm,
Roll shifting L1 program also limits acceptable maximum during realizing and sets roll shifting as ± (200-L) simultaneously
Mm, if setting roll shifting more than (200-L) mm or less than-(200-L) mm, then roll shifting L1
Automatically roll shifting is modified to ± (200-L) mm.
Fig. 5 show the flow chart of the roll shifting location method optimizing program of the present invention, as it is shown in figure 5,
The step of roll shifting localization method is:
1) after roll change completes, roll shifting L1 is by roll shifting position play to 0.
2) starting milling train acyclic homologically trioial, lower compression roller is sewn to general rolling force and reaches 1000 tons or 1500 tons and carry out
Roll gap resets.
3) roll shifting amount Pset that next block band steel roll shifting L2 sets is received
4) roll shifting amount limiting value is judged:
If Pset > 180, then Pset=180；
If Pset <-180, then Pset=-180；
If-180≤Pset≤180, then Pset=Pset；
5) current roll shifting L1 actual roll shifting position Pact is read
6) sign of Pact-Pset is judged:
If Pact-Pset > 0,
Then Pact=Pset, directly channels to the position of Pset by roll shifting position；
If Pact-Pset < 0,
Then first Pact=Pset+L, channels to roll shifting position than setting position to the position of the many Lmm of active side
Put, wait channeling to (Pset+L) and wait t time second, then Pact=Pset+L-L, by roll shifting position later
Put the position channeling to Pset.
7) allow after roll shifting has positioned to sting steel.
Below by an embodiment, above-mentioned step is described.
Actual roll shifting position after 1st block of band steel rolls is 0
2nd block of band steel sets roll shifting position as-50mm, owing to currently practical roll shifting position is 0, then
0-(-50)=50 > 0, actual roll shifting is directly by 0 current position moving to-50mm.
3rd block of band steel sets roll shifting position as-100mm, owing to currently practical roll shifting position is-50,
Then-50-(-100)=50 > 0, actual roll shifting is directly moved to-100mm by current-50mm position
Position.
4th block of band steel sets roll shifting position as-200mm, due to-200 <-180, so by roll shifting
The roll shifting position correction that L2 sets is as-180mm.Owing to currently practical roll shifting position is-100, then
-100-(-180)=80 > 0, actual roll shifting is directly moved to-180mm by current-100mm position
Position.
5th block of band steel sets roll shifting position-150mm, owing to currently practical roll shifting position is-180
-180-(-150)=-30 < 0, actual roll shifting is first moved to by current-180mm place value
The position of (-150+20=-130) mm, after waiting t second, then by the position of current-130mm
Put the play position to (-150+20-20=-150) mm.Follow-up band steel is the most in the manner described above
Carry out roll shifting, be finally completed whole rolling scaduled roll shifting.
Support roller can be made to be issued to work in the effect of working roll frictional force in order to ensure returning the process of altering
The purpose that roller play direction is moved, when roll shifting is altered to active side, amount L altered usually more
10-30mm, the 20mm used in the example above return the amount of altering.
According to the roll shifting mode of citing data, final roll shifting location all positions to transmission side, reduces
Size fluctuation in vertical direction and uncertainty, eliminate because the roll-force that roll shifting reversely causes is jumped
Jump, substantially increase the forecast precision of rolling force model.
From fig. 6, it can be seen that tradition roll shifting mode under, when roll shifting is altered to active side, active side and
The rolling force deviation of transmission side time is relatively big, and general rolling force is less simultaneously；When roll shifting is altered to transmission side,
The rolling force deviation of active side and transmission side time is less, and general rolling force is big simultaneously.Use new roll shifting
After mode, no matter roll shifting is to active side or when transmission side is altered, rolling force deviation and general rolling force
And the relation between roll shifting direction is inconspicuous, illustrate that new roll shifting mode eliminates roll shifting direction to reality
The impact of roll-force, such that it is able to be greatly improved the forecast precision of rolling stability and model.
When the statistics of actual production shows to use tradition roll shifting mode, the forecast of rolling force model
Deviation fluctuates about ± 30%, the biggest to the stability influence of threading.Roll shifting location method optimizing
After, the forecast precision of rolling force model can control within 10%, such that it is able to be greatly improved rolling
Stability.
Those of ordinary skill in the art is it should be appreciated that above specification is only the present invention
One or more embodiments in numerous embodiments, and not use limitation of the invention.Any right
The technical schemes such as impartial change, modification and the equivalent replacement in embodiment described above, as long as meeting
The spirit of the present invention, all will fall in the range of claims of the present invention is protected.
Claims (1)
1. one kind eliminates the method for roll-force fluctuation after milling train roll shifting, it is characterised in that include following step
Rapid:
Receive the roll shifting amount of band steel；
Roll shifting L1 is directly set to roll shifting setting position according to roll shifting L2；
Described roll shifting L1 first alters the first distance to active side more, returns to transmission side again and alter after waiting location to complete
Described first distance, is eventually returned to described setting position；
Set roll shifting L2 roll shifting critical distance as ± (200-the first distance) mm；
When described roll shifting L2 roll shifting critical distance is for more than (200-the first distance) mm or less than-(200-
First distance) mm time, described roll shifting distance correction is ± (200-first by described roll shifting L1 automatically
Distance) mm；
Judge the sign of the actual value-setting value of described roll shifting L1；
Described actual value-setting value > 0, set described actual value equal to described setting value；
Described actual value-setting value < 0, set described actual value equal to described setting value+described first away from
From；
Described actual value is equal to described setting value, and described roll shifting L2 is set to described setting position；
Described actual value is equal to described setting value+described first distance, by described roll shifting L1 first to work
The first distance is altered in side more, and waits the very first time, returns to transmission side described in altering after waiting location to complete again
First distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005466.6A CN103909097B (en) | 2013-01-08 | 2013-01-08 | The method that after eliminating milling train roll shifting, roll-force fluctuates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005466.6A CN103909097B (en) | 2013-01-08 | 2013-01-08 | The method that after eliminating milling train roll shifting, roll-force fluctuates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103909097A CN103909097A (en) | 2014-07-09 |
| CN103909097B true CN103909097B (en) | 2016-08-24 |
Family
ID=51035275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310005466.6A Active CN103909097B (en) | 2013-01-08 | 2013-01-08 | The method that after eliminating milling train roll shifting, roll-force fluctuates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103909097B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107537862B (en) * | 2017-09-18 | 2020-06-02 | 浦项(张家港)不锈钢股份有限公司 | Method and device for controlling movement of pass and pass-specific working rolls of steckel mill |
| CN113263060B (en) * | 2021-04-25 | 2023-01-20 | 北京科技大学设计研究院有限公司 | Roll shifting control method for improving kilometers of rolled working rolls with strip steel locally raised and lifted |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3881335A (en) * | 1974-03-07 | 1975-05-06 | Westinghouse Electric Corp | Roll eccentricity correction system and method |
| US5873277A (en) * | 1996-05-09 | 1999-02-23 | Siemens Aktiengesellschaft | Control process for a roll stand for rolling a strip |
| CN101920265A (en) * | 2009-06-09 | 2010-12-22 | 鞍钢股份有限公司 | Method for optimizing roll shifting process of middle roll of six-roll cold mill |
| CN102107216A (en) * | 2009-12-25 | 2011-06-29 | 鞍钢股份有限公司 | Roller shifting method for controlling deviation of steel strip |
| CN102161052A (en) * | 2010-02-23 | 2011-08-24 | 宝山钢铁股份有限公司 | Hot rolling flat roller play control method |
-
2013
- 2013-01-08 CN CN201310005466.6A patent/CN103909097B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3881335A (en) * | 1974-03-07 | 1975-05-06 | Westinghouse Electric Corp | Roll eccentricity correction system and method |
| US5873277A (en) * | 1996-05-09 | 1999-02-23 | Siemens Aktiengesellschaft | Control process for a roll stand for rolling a strip |
| CN101920265A (en) * | 2009-06-09 | 2010-12-22 | 鞍钢股份有限公司 | Method for optimizing roll shifting process of middle roll of six-roll cold mill |
| CN102107216A (en) * | 2009-12-25 | 2011-06-29 | 鞍钢股份有限公司 | Roller shifting method for controlling deviation of steel strip |
| CN102161052A (en) * | 2010-02-23 | 2011-08-24 | 宝山钢铁股份有限公司 | Hot rolling flat roller play control method |
Non-Patent Citations (1)
| Title |
|---|
| LVC工作辊辊型窜辊策略及实际应用;王仁忠等;《钢铁研究学报》;20071115;第19卷(第11期);第33-36页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103909097A (en) | 2014-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201565790U (en) | Center frame with bearings | |
| CN103909097B (en) | The method that after eliminating milling train roll shifting, roll-force fluctuates | |
| CN202316558U (en) | Looping base structure for preventing deviation of steel strip | |
| CN203282380U (en) | Spliced type base | |
| CN102601702B (en) | Processing method for internal sphere of split bearing seat | |
| CN202668268U (en) | Floating support block | |
| CN202607242U (en) | Pedestal of vertical line rail machining center machine | |
| CN202141411U (en) | Groove width testing device of tapered groove | |
| CN102407449B (en) | Machine tool and working table device thereof | |
| CN201988572U (en) | Outlet sliding guide device with adjustable width | |
| CN203711477U (en) | Pressure head pressure-sharing pad structure of four-roller reversible rolling mill | |
| CN203681568U (en) | Moving-out reset device of continuous gas heat exchanger | |
| CN203572375U (en) | Hole position degree detection device | |
| CN202606506U (en) | Four-high mill working roll assembly accuracy rapid detection adjusting device | |
| CN205869638U (en) | Horizontal aligning mechanism of work piece and work piece cut equipment | |
| CN205949555U (en) | Lower frame levelling machine on liquid crystal cell card casket stainless steel | |
| CN104275411A (en) | Improved type mold structure | |
| CN202885757U (en) | Tool for coaxiality of bearing blocks of thin-wall equipment and detecting device for detecting | |
| CN202343554U (en) | Rolling mill with 10 rollers | |
| CN102671950B (en) | System and method for judging roll consumption of cold rolling working roll | |
| CN202846166U (en) | Machine tool for producing farm machine parts | |
| CN202539219U (en) | Precision rolling loop roll capable of adjusting deviation of strip steel | |
| CN104104023B (en) | The positioning regulating mechanism that certainty of measurement is high | |
| CN202606492U (en) | Hot-rolled seamless steel tube sizing mill | |
| CN204136136U (en) | With the lug cutting machine of positioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |