CN102755996A - Method for eliminating local abrasion of flat work rolls - Google Patents
Method for eliminating local abrasion of flat work rolls Download PDFInfo
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- CN102755996A CN102755996A CN2012101634274A CN201210163427A CN102755996A CN 102755996 A CN102755996 A CN 102755996A CN 2012101634274 A CN2012101634274 A CN 2012101634274A CN 201210163427 A CN201210163427 A CN 201210163427A CN 102755996 A CN102755996 A CN 102755996A
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- barreled
- bending roller
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Abstract
The invention provides a method for eliminating the local abrasion of flat work rolls, which comprises the following steps: before a first roll of strip steel is rolled, a plate type presetting model presets the roll channeling positions T (i) of the work rolls of a flat roll frame in the rolling process of the first roll of strip steel and calculates the roll bending force values Fj (i) of all the work rolls of the flat roll frame through the roll channeling positions T (i) in the rolling process of the first roll of strip steel; and the roll channeling positions T (i) and the roll bending force values Fj (i) of all the work rolls of the flat roll frame are outputted to a level-1 basic automation control system of a plate-shaped control system for execution, wherein j is a serial number of the flat roll frame.
Description
Technical field
The present invention relates to technical field of steel rolling, particularly a kind of method of eliminating the concentrated wear of plain-barreled roll working roll.
Background technology
Along with manufacturing industry such as China's automobile, household electrical appliances obtain develop rapidly, Automobile Plate and household electrical appliances panel products quality requirement are increasingly high, and this requirement to raw-material each item quality index also improves constantly, and wherein just comprises the local high spot quality control index of raw material.As the primary raw material of automobile, tame electroplax, the strip shape quality of flat cold-rolled sheet has decisive influence to the outward appearance of final automobile, household electrical appliances finished product.The strip shape quality of flat cold-rolled sheet then depends on the strip shape quality of its hot rolling raw material to a great extent.
Local high spot the obvious phenomenon bigger than normal of thickness occurs in being meant on the thin plate broad ways among a small circle, belongs to the high order flatness defect.Because it is thinner at the cold-rolled process belt steel thickness; Metal lateral flow property weakens; The longitudinal extension rate that local high spot band of position steel produces very easily produces local high order shape wave apparently higher than other position, coating, coiling technique and end product quality is afterwards caused have a strong impact on.Therefore, the hot rolling raw material that has a local high spot defective has extremely ill effect to cold rolling end product quality.
Find after deliberation; The formation of SPHC limit portion local high spot mainly is owing to the temperature of strip edge portion in the operation of rolling is lower; And be easy to generate and operation roll of mill between contact stress concentrate; Make working roll produce the severe local wearing and tearing, the deflection that in the operation of rolling, is in the band steel at working roll heavy wear position significantly is lower than other part, thereby forms local high spot.In order to address this problem, hot rolling mill has to descend machine in advance because the working roll concentrated wear seriously can not guarantee strip shape quality, has greatly improved production cost, becomes when last vital task so seek the method that solves the concentrated wear of plain-barreled roll working roll.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of eliminating the concentrated wear of plain-barreled roll working roll, solves plain-barreled roll working roll severe local wear problems.
For solving the problems of the technologies described above; The invention provides a kind of method of eliminating the concentrated wear of plain-barreled roll working roll; Comprise: before rolling i winding steel; The roll shifting position T (i) of plain-barreled roll frame working roll when the template preset model presets rolling i winding steel; And the bending roller force value Fj (i) of all plain-barreled roll frame working rolls when calculating rolling i winding steel, and the one-level basic automatization control system that the roll shifting position T (i) and the bending roller force value Fj (i) of plain-barreled roll frame working roll exports plat control system to carried out with said roll shifting position T (i); Said j is the numbering of plain-barreled roll frame.
A kind of method of eliminating the concentrated wear of plain-barreled roll working roll provided by the invention; Can change working roll periodically frequency, the amplitude of roll shifting through changing parameters such as roll shifting step-length, bending roller force compensation limit value; Reach the effect of eliminating working roll concentrated wear, control SPHC limit portion local high spot, be implemented in applying in the flat roll mill of the same type easily.
Description of drawings
The working roll setting curve figure of roll shifting amount under the roll shifting pattern periodically in the method for the elimination plain-barreled roll working roll concentrated wear that Fig. 1 provides for the embodiment of the invention.
Use the working roller abrasion roll shape curve before this method in the method for the elimination plain-barreled roll working roll concentrated wear that Fig. 2 provides for the embodiment of the invention.
Use the working roller abrasion roll shape curve after this method in the method for the elimination plain-barreled roll working roll concentrated wear that Fig. 3 provides for the embodiment of the invention.
Use the wide curve of production board before this method in the method for the elimination plain-barreled roll working roll concentrated wear that Fig. 4 provides for the embodiment of the invention.
Use the wide curve of production board after this method in the method for the elimination plain-barreled roll working roll concentrated wear that Fig. 5 provides for the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the method for elimination plain-barreled roll working roll provided by the invention concentrated wear is elaborated; The method of the elimination plain-barreled roll working roll concentrated wear that the embodiment of the invention provides; Comprise: before rolling i winding steel; The roll shifting position T (i) of plain-barreled roll frame working roll when the template preset model presets rolling i winding steel; And the bending roller force value Fj (i) of all plain-barreled roll frame working rolls when calculating rolling i winding steel, and the one-level basic automatization control system that the roll shifting position T (i) and the bending roller force value Fj (i) of plain-barreled roll frame working roll exports plat control system to carried out with said roll shifting position T (i); Said j is the numbering of plain-barreled roll frame.
Wherein, the establishing method of the roll shifting position T (i) of plain-barreled roll frame working roll comprises:
The template control system of flat roll mill system is in automatic control state;
Roll shifting step-length t
sBig I change and change according to the plan layout of rolling unit;
The initial value T (i) of the roll shifting position of plain-barreled roll frame working roll is zero;
The setting value T (i) of the roll shifting position of all plain-barreled roll frame working rolls is identical, and the direction people of roll shifting simultaneously is for being set at positive and negative both direction, and the position during with not roll shifting is an initial point;
Be during when rolling (i-1) winding steel towards the positive direction roll shifting, the value T (i-1) and roll shifting step-length t of the roll shifting position of plain-barreled roll frame working roll when the setting value T (i) of the roll shifting position of plain-barreled roll frame working roll is rolling (i-1) winding steel during rolling i winding steel
sWith, i.e. T (i)=T (i-1)+t
s
Be during when rolling (i-1) winding steel towards the negative direction roll shifting, the value T (i-1) and roll shifting step-length t of the roll shifting position of plain-barreled roll frame working roll when the setting value T (i) of the roll shifting position of plain-barreled roll frame working roll is rolling (i-1) winding steel during rolling i winding steel
sPoor, i.e. T (i)=T (i-1)-t
s
Wherein, when setting the roll shifting position T (i) of plain-barreled roll frame working roll, under following any situation, the roll shifting direction reverses:
First kind, the setting value T of roll shifting position (i) is greater than T
ULOr less than T
LL, said T
ULBe the limes superiors that the roll shifting position allows, said T
LLLimit inferior for the permission of roll shifting position;
Second kind, the setting value Fj of bending roller force (i) is greater than Fj
ULOr less than Fj
LL, said Fj
ULBe the bending roller force compensation upper limit of plain-barreled roll frame, said Fj
LLBending roller force compensation lower limit for the plain-barreled roll frame.
Wherein, when the roll shifting direction reversed, the establishing method of the roll shifting position T (i) of plain-barreled roll frame working roll comprised:
Be during when rolling (i-1) winding steel towards the positive direction roll shifting, the value T (i-1) of the roll shifting position of plain-barreled roll frame and roll shifting step-length t when the setting value T of roll shifting position (i) is rolling (i-1) winding steel
sPoor, i.e. T (i)=T (i-1)-t
s
Be during when rolling (i-1) winding steel towards the negative direction roll shifting, the value T (i-1) of the roll shifting position of plain-barreled roll frame and roll shifting step-length t when the setting value T of roll shifting position (i) is rolling (i-1) winding steel
sSum, i.e. T (i)=T (i-1)+t
s
Wherein, the roll shifting step-length of said working roll is t
s=10mm.
Wherein, The bending roller force value Fj (i) of all plain-barreled roll frame working rolls is preceding when calculating rolling i winding steel; The template preset model is according to the setting value T (i) of the roll shifting position of said plain-barreled roll frame working roll; Convexity desired value that this winding steel is overall and glacing flatness desired value; Calculate the ratio convexity apportioning cost of each frame, and calculate the bending roller force value Fj (i) of each plain-barreled roll frame working roll, calculate the bending roller force value of each plain-barreled roll frame working roll simultaneously according to the ratio convexity apportioning cost of each non-flat roller frame according to the ratio convexity apportioning cost of each plain-barreled roll frame.
Wherein, after calculating the bending roller force value Fj (i) of said plain-barreled roll frame working roll, to judge also whether said bending roller force value Fj (i) surpasses the bending roller force compensation upper limit Fj of this plain-barreled roll frame
UL, bending roller force compensation lower limit Fj
LL
If bending roller force setting value Fj (i) is less than the compensation lower limit Fj of bending roller force
LL, make the setting value Fj (i) of bending roller force equal bending roller force compensation lower limit Fj
LL, i.e. Fj (i)=Fj
LLIf bending roller force setting value Fj (i) is greater than the compensation upper limit Fj of bending roller force
UL, make the setting value Fj (i) of bending roller force equal bending roller force compensation upper limit Fj
UL, i.e. Fj (i)=Fj
UL
Wherein, the compensation upper limit of said bending roller force is set at Fj
UL=Fj
MAX-300, the compensation lower limit set of said bending roller force is Fj
LL=Fj
MIN+ 250; Said Fj
MAXBe the maximum bending roller force that milling train allows, Fj
MINBe the minimum bending roller force that milling train allows, unit is kN.
Wherein, making the setting value Fj of bending roller force (i) equal bending roller force compensation upper limit Fj
ULOr bending roller force compensation lower limit Fj
LLThe time, the establishing method of roll shifting position resets the value T (i) of the roll shifting position of plain-barreled roll frame working roll when reversing according to the roll shifting direction; Calculate simultaneously the ratio convexity apportioning cost of this plain-barreled roll frame with the setting value T (i) of the setting value Fj (i) of revised this bending roller force and roll shifting position; Thereby the preset model that makes plat control system is according to this winding steel overall convexity desired value and glacing flatness desired value; Again confirm the convexity apportioning cost of other plain-barreled roll frame, and calculate other plain-barreled roll frame bending roller force setting value Fj (i).
Also comprise the working roll of judging this plain-barreled roll frame and whether occur restarting the periodically condition of roll shifting in the phase, restart the periodicity roll shifting when promptly institute's organic frame arbitrary changes working roll at its roller;
Restart the periodically entry condition of roll shifting pattern if meet, then roll shifting position T (i) with all plain-barreled roll frame working rolls resets to 0.
Technical scheme provided by the invention is applied to certain 1580 SPHC production line finishing mill F5 of factory, F6, F7 frame, solves the limit portion local high spot problem of this product of production line.The maximum bending roller force that this 1580 SPHC finishing mill F5, F6, F7 frame working roll allow is 1500kN; The minimum bending roller force that allows is 0kN; The positive roll shifting limit of working roll is 150mm, and the negative roll shifting limit of working roll is-150mm to be limited to 1200kN in the bending roller force compensation; Be limited to 250kN under the bending roller force compensation, working roll roll shifting step-length is set at t
s=10mm.
After the method application with elimination plain-barreled roll working roll provided by the invention concentrated wear, production line F5, F6, F7 frame working roll have been realized periodically roll shifting, and be as shown in Figure 1.Comparison diagram 2, Fig. 3 can find out that working roll concentrated wear phenomenon has obtained obvious improvement.Comparison diagram 4, Fig. 5 can find that the limit portion local high spot problem of SPHC product has obtained effective solution.
The method of elimination plain-barreled roll working roll provided by the invention concentrated wear; Roll shifting position T (i) through initiatively setting plain-barreled roll frame working roll, change parameters such as roll shifting step-length, bending roller force compensation limit value and can change working roll periodically frequency, the amplitude of roll shifting; Reach the effect of eliminating working roll concentrated wear, control SPHC limit portion local high spot, be implemented in applying in the flat roll mill of the same type easily.
It should be noted last that; The above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to instance the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the spirit and the scope of technical scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. method of eliminating the concentrated wear of plain-barreled roll working roll; It is characterized in that; Before rolling i winding steel; The roll shifting position T (i) of plain-barreled roll frame working roll when the template preset model presets rolling i winding steel; And the bending roller force value Fj (i) of all plain-barreled roll frame working rolls when calculating rolling i winding steel, and the one-level basic automatization control system that the roll shifting position T (i) and the bending roller force value Fj (i) of plain-barreled roll frame working roll exports plat control system to carried out with said roll shifting position T (i); Said j is the numbering of plain-barreled roll frame.
2. the method for elimination plain-barreled roll working roll as claimed in claim 1 concentrated wear is characterized in that, said when presetting rolling i winding steel roll shifting position T (i) of plain-barreled roll frame working roll comprise:
The template control system of flat roll mill system is in automatic control state;
Roll shifting step-length t
sBig I change and change according to the plan layout of rolling unit;
The initial value T (i) of the roll shifting position of said plain-barreled roll frame working roll is zero;
The setting value T (i) of the roll shifting position of all plain-barreled roll frame working rolls is identical, and the direction people of roll shifting simultaneously is for being set at positive and negative both direction, and the position during with not roll shifting is an initial point;
Be during when rolling (i-1) winding steel towards the positive direction roll shifting, the value T (i-1) and roll shifting step-length t of the roll shifting position of plain-barreled roll frame working roll when the setting value T (i) of the roll shifting position of plain-barreled roll frame working roll is rolling (i-1) winding steel during rolling i winding steel
sWith, i.e. T (i)=T (i-1)+t
s
Be during when rolling (i-1) winding steel towards the negative direction roll shifting, the value T (i-1) and roll shifting step-length t of the roll shifting position of plain-barreled roll frame working roll when the setting value T (i) of the roll shifting position of plain-barreled roll frame working roll is rolling (i-1) winding steel during rolling i winding steel
sPoor, i.e. T (i)=T (i-1)-t
s
3. according to claim 1 or claim 2 the method for elimination plain-barreled roll working roll concentrated wear is characterized in that when setting the roll shifting position T (i) of said plain-barreled roll frame working roll, under following any situation, the roll shifting direction reverses:
First kind, the setting value T (i) of said roll shifting position is greater than T
ULOr less than T
LL, said T
ULBe the limes superiors that the roll shifting position allows, said T
LLLimit inferior for the permission of roll shifting position;
Second kind, the setting value Fj of said bending roller force (i) is greater than Fj
ULOr less than Fj
LL, said Fj
ULBe the bending roller force compensation upper limit of plain-barreled roll frame, said Fj
LLBending roller force compensation lower limit for the plain-barreled roll frame;
4. the method for elimination plain-barreled roll working roll as claimed in claim 3 concentrated wear is characterized in that, when said roll shifting direction reversed, the establishing method of the roll shifting position T (i) of said plain-barreled roll frame working roll comprised:
Be during when rolling (i-1) winding steel towards the positive direction roll shifting, the value T (i-1) of the roll shifting position of plain-barreled roll frame and roll shifting step-length t when the setting value T of roll shifting position (i) is rolling (i-1) winding steel
sPoor, i.e. T (i)=T (i-1)-t
s
Be during when rolling (i-1) winding steel towards the negative direction roll shifting, the value T (i-1) of the roll shifting position of plain-barreled roll frame and roll shifting step-length t when the setting value T of roll shifting position (i) is rolling (i-1) winding steel
sSum, i.e. T (i)=T (i-1)+t
s
5. the method for elimination plain-barreled roll working roll as claimed in claim 4 concentrated wear is characterized in that the roll shifting step-length of said working roll is t
s=10mm.
6. the method for elimination plain-barreled roll working roll as claimed in claim 1 concentrated wear; It is characterized in that; The bending roller force value Fj (i) of said all plain-barreled roll frame working rolls is preceding when calculating rolling i winding steel; The template preset model is according to the setting value T (i) of the roll shifting position of said plain-barreled roll frame working roll; Convexity desired value that this winding steel is overall and glacing flatness desired value calculate the ratio convexity apportioning cost of each frame, and calculate the bending roller force value Fj (i) of each plain-barreled roll frame working roll according to the ratio convexity apportioning cost of each plain-barreled roll frame.
7. like the method for claim 1 or 6 described elimination plain-barreled roll working roll concentrated wears; It is characterized in that; After calculating the bending roller force value Fj (i) of said plain-barreled roll frame working roll, to judge also whether said bending roller force value Fj (i) surpasses the bending roller force compensation upper limit Fj of this plain-barreled roll frame
UL, bending roller force compensation lower limit Fj
LL
If bending roller force setting value Fj (i) is less than the compensation lower limit Fj of bending roller force
LL, make the setting value Fj (i) of bending roller force equal bending roller force compensation lower limit Fj
LL, i.e. Fj (i)=Fj
LLIf bending roller force setting value Fj (i) is greater than the compensation upper limit Fj of bending roller force
UL, make the setting value Fj (i) of bending roller force equal bending roller force compensation upper limit Fj
UL, i.e. Fj (i)=Fj
UL
8. the method for elimination plain-barreled roll working roll as claimed in claim 7 concentrated wear is characterized in that the compensation upper limit of said bending roller force is set at Fj
UL=Fj
MAX-300, the compensation lower limit set of said bending roller force is Fj
LL=Fj
MIN+ 250; Said Fj
MAXBe the maximum bending roller force that milling train allows, Fj
MINBe the minimum bending roller force that milling train allows, unit is kN.
9. the method for elimination plain-barreled roll working roll as claimed in claim 7 concentrated wear is characterized in that, is making the setting value Fj of said bending roller force (i) equal bending roller force compensation upper limit Fj
ULOr bending roller force compensation lower limit Fj
LLThe time, reset the value T (i) of the roll shifting position of plain-barreled roll frame working roll according to the described method of claim 4; Calculate simultaneously the convexity apportioning cost of this plain-barreled roll frame with the setting value T (i) of the setting value Fj (i) of revised this bending roller force and roll shifting position; Thereby make preset model in the plat control system according to this winding steel overall convexity desired value and glacing flatness desired value; Again confirm the ratio convexity apportioning cost of other plain-barreled roll frame, and calculate other plain-barreled roll frame bending roller force setting value Fj (i).
10. according to claim 1 or claim 2 the method for elimination plain-barreled roll working roll concentrated wear is characterized in that, also comprises the working roll of judging institute's organic frame and whether occurs restarting the periodically condition of roll shifting in the phase at its roller;
Restart the periodically entry condition of roll shifting pattern if meet, then roll shifting position T (i) with all plain-barreled roll frame working rolls resets to 0.
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|---|---|---|---|
| CN201210163427.4A CN102755996B (en) | 2012-05-23 | 2012-05-23 | Method for eliminating local abrasion of flat work rolls |
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|---|---|---|---|
| CN201210163427.4A CN102755996B (en) | 2012-05-23 | 2012-05-23 | Method for eliminating local abrasion of flat work rolls |
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| CN102755996B CN102755996B (en) | 2014-10-22 |
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| CN103752619A (en) * | 2013-10-29 | 2014-04-30 | 首钢京唐钢铁联合有限责任公司 | Roll shifting control method and device for hot rolling operation |
| CN104942020B (en) * | 2014-03-27 | 2017-09-12 | 上海梅山钢铁股份有限公司 | The wear-compensating of hot continuous rolling support roller and adaptive approach |
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