CN106862278B - For variable step roll shifting control method in the period of hot rolling downstream rack working roll - Google Patents
For variable step roll shifting control method in the period of hot rolling downstream rack working roll Download PDFInfo
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- CN106862278B CN106862278B CN201710247375.1A CN201710247375A CN106862278B CN 106862278 B CN106862278 B CN 106862278B CN 201710247375 A CN201710247375 A CN 201710247375A CN 106862278 B CN106862278 B CN 106862278B
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- roll shifting
- roll
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- working rolls
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/24—Roll wear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2269/00—Roll bending or shifting
- B21B2269/12—Axial shifting the rolls
- B21B2269/14—Work rolls
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
Abstract
The present invention provides variable step roll shifting control method in a kind of period for hot rolling downstream rack working roll, belongs to hot rolling roll shifting control technology field.This method carries out roll shifting according to pre- fixed step size after the completion of each piece of rolled piece rolls, upper working rolls and lower working rolls roll shifting direction carries out reversely after reaching maximum roll shifting travel position forward or backwards, starting point is in the position to be coincided using upper working rolls and lower working rolls, it is the single back and forth roll shifting period that the position that upper working rolls and lower working rolls coincide is turned again to after positive and reversed maximum roll shifting travel position is each once, and the roll shifting step-length of variation is used in the roll shifting period.On the one hand roll shifting control method of the invention can make in the entire roll shifting period, the distribution of roll shifting value is as uniform as possible, be conducive to homogenize the abrasion of roll, on the other hand identical roll shifting value can be avoided the occurrence of within the roll shifting period, further homogenize roll wear, to reduce the problem of subsequent rolled edge drop caused by the worn roll shape generated increases with shape wave, extend rolling milimeter number.
Description
Technical field
The present invention relates to hot rolling roll shifting control technology fields, particularly relate to a kind of week for hot rolling downstream rack working roll
Variable step roll shifting control method in phase.
Background technique
Two stages of parameters roll shifting and variable element roll shifting such as the development experience of roll shifting control method.Etc. parameters roll shifting refer to
Within the entire rolling cycle, the roll shifting stroke, roll shifting step-length and the roll shifting frequency that are kept fixed carry out periodic reverse roll shifting.Become
Parameter roll shifting refers to that during entire roll shifting, the changed roll shifting such as roll shifting stroke, roll shifting step-length and roll shifting frequency controls
Method, such method include to become stroke unique step roll shifting control method and change stroke variable step roll shifting control method.
From the change stroke variable step roll shifting control method optimized of initial equal strokes roll shifting control method till now, roll
The wear condition of roller has very big improvement, and the plate shape for rolling latter stage also has improvement.But it still has the disadvantage that at present:
1. all roll shifting control methods are confined to unique step in the monocycle, but this roll shifting control method, cause entire
The contact frequency distribution of strip and working roll different location and unbalanced in the roller phase.For a long time, do not consider in the art be
It is no variable step and step-length how to change within the monocycle；
2. the repetition of roll shifting value necessarily leads to the aggravation of this position abrasion loss in current roll shifting control method, will lead
Cat ear height is caused to increase, but above-mentioned all roll shifting control methods do not face this problem or propose to solve this problem
Thinking.
Summary of the invention
The technical problem to be solved in the present invention is to provide variable steps in a kind of period for hot rolling downstream rack working roll
Roll shifting control method.
This method is rolled for metal plates and strips, and after one piece of rolled piece completes rolling, upper working rolls and lower working rolls are reversed traversing identical
Distance, then carry out the rolling of next piece of rolled piece, i.e. roll shifting；In belt steel rolling production process, upper working rolls and lower working rolls are in forward direction
With the carrying out periodic reverse roll shifting between reversed maximum roll shifting travel position, i.e. according to predetermined after the completion of each piece of rolled piece rolling
Step-length carries out roll shifting, reach upper working rolls and lower working rolls roll shifting direction after maximum roll shifting travel position forward or backwards carry out reversely, with
The position that upper working rolls and lower working rolls coincide is starting point, is turned again to after positive and reversed maximum roll shifting travel position is each once
The position that bottom working roll coincides is the single reciprocal roll shifting period.
Roll shifting control method proposed by the present invention has a characteristic that altering using variation in the single reciprocal roll shifting period
Roller step-length, from upper working rolls and lower working rolls overlapping positions to roll shifting forward direction and reversed maximum travel position, roll shifting step-length is gradually reduced, roll shifting
The change in location of operation is realized in the form of SIN function.The roll shifting step-length of variation is altered by priming stroke, stroke attenuation function
Four parts of roller periodic term and anti-duplicate keys control.Wherein, the form of SIN function are as follows:
li=LF (t) sin (iB ± C) (1)
Wherein,
F (t)=kt-1 (2)
Wherein:
I is the block number of rolled band steel, unit 1；
liTo roll roll shifting value when i-th piece of strip, unit mm；
L is priming stroke, for controlling the stroke in first reciprocal roll shifting period, unit mm；
F (t) is stroke attenuation function, for controlling the rate of decay of roll shifting stroke, unit 1；
T is reciprocal roll shifting periodicity, unit 1；
Stroke attenuation coefficient of the k between the reciprocal roll shifting period, unit 1；
B is roll shifting periodic term, for controlling roll shifting periodicity and the rolling block number in each roll shifting period, unit 1；
C is anti-duplicate keys, for preventing the repetition of roll shifting value in the period, unit 1.
In above-mentioned parameter, priming stroke L value range is 0mm~150mm；
Stroke attenuation function F (t), codomain range are (0.5,0.9)；
Stroke attenuation coefficient k, value range are (0.65,1)；
Reciprocal roll shifting periodicity t, value range are { 2,3,4 }；
Roll shifting periodic term B, value range are (0.1256,0.628)；
Anti- duplicate keys C, value range are (- B, 0).
The basic goal of working roll roll shifting design and optimization is the equal of the contact as far as possible between realization working roll and strip
It homogenizes, to realize the homogenization of working roller abrasion, delays the generation of " cat ear shape " abrasion cabinet, meanwhile, it reduces as far as possible
Subsequent rolled edge drop caused by worn roll shape through generating increases and shape wave problem, final extension rolling milimeter number.
However, roll shifting control method before is not noticed single past although using reciprocal roll shifting control method
The importance of roll shifting step change, uses uniform roll shifting step-length, this causes in single oscillation cycle in the multiple roll shifting period
The contact frequency distribution of strip and working roll different location and unbalanced in the roll shifting period.In addition, roll shifting control method before
Within a roll shifting period, during the roll shifting of positive and negative both direction, the overlapping of roll shifting position easy to form, this point is for each
Kind homogenization abrasion is also unfavorable.
The advantageous effects of the above technical solutions of the present invention are as follows:
1) function continuity is preferable, is easier to realize in industry spot than variable element roll shifting control method, strong operability,
Convenient for modification of program.
2) using the roll shifting operation of variable step in the monocycle, so that the rolling time phase of upper working rolls and lower working rolls middle part repeat region
It should reduce, the rolling time of upper working rolls and lower working rolls border region is increase accordingly, so that roll shifting value is in entire roll shifting section
Be distributed it is more uniform, be conducive to roll homogenization abrasion, can reduce worn roll shape " cat ear shape " height.
3) make the edge of rolled piece have been at the part for the roll almost not worn, be conducive to reduce side drop, simultaneously
Reduce step-length in the position that roll shifting reduces, also adequately can utilize roll within each period.
4) proposition of anti-duplicate keys can largely reduce roll shifting value by giving one dislocation value of SIN function
Duplicate probability is conducive to further homogenize worn roll shape.
Detailed description of the invention
Fig. 1 is sinusoidal roll shifting control method roll shifting Distribution value schematic diagram provided in an embodiment of the present invention.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides variable step roll shifting control method in a kind of period for hot rolling downstream rack working roll, this method
It is rolled for metal plates and strips, after one piece of rolled piece completes rolling, then the reversed traversing identical distance of upper working rolls and lower working rolls carries out
The rolling of next piece of rolled piece, i.e. roll shifting；In belt steel rolling production process, upper working rolls and lower working rolls are in positive and reversed maximum roll shifting row
Periodic reverse is carried out between journey position roll shifting carries out roll shifting according to pre- fixed step size after the completion of i.e. each piece of rolled piece rolling, reaches
It carries out reversely, coinciding with upper working rolls and lower working rolls to upper working rolls and lower working rolls roll shifting direction after maximum roll shifting travel position forward or backwards
Position be starting point, by it is positive with reversed maximum roll shifting travel position it is each it is primary after turn again to what upper working rolls and lower working rolls coincided
Position is the single reciprocal roll shifting period, and referring to attached drawing 1, a sine wave is a cycle.
Roll shifting control method of the invention has a characteristic that the roll shifting step in the single reciprocal roll shifting period using variation
Long, from upper working rolls and lower working rolls overlapping positions to roll shifting forward direction and reversed maximum travel position, roll shifting step-length is gradually reduced.The present invention adopts
It is operated with the roll shifting of variable step in the monocycle, so that the rolling time of repeat region is accordingly reduced in the middle part of upper working rolls and lower working rolls, up and down
The rolling time in working roll edge region is increase accordingly, so that distribution of the roll shifting value in entire roll shifting section is more equal
It is even, be conducive to the homogenization abrasion of roll, can reduce " cat ear shape " height of worn roll shape.
Wherein, the change in location of roll shifting operation is realized in the form of SIN function.The roll shifting step size control method packet of variation
Include priming stroke, stroke attenuation function, four parts of roll shifting periodic term and anti-duplicate keys.The form of the SIN function are as follows:
li=LF (t) sin (iB ± C) (1)
Wherein,
F (t)=kt-1 (2)
Wherein:
I is the block number of rolled band steel, unit 1；
liTo roll roll shifting value when i-th piece of strip, unit mm；
L is priming stroke, for controlling the stroke in first reciprocal roll shifting period, unit mm；
F (t) is stroke attenuation function, for controlling the rate of decay of roll shifting stroke, unit 1；
T is reciprocal roll shifting periodicity, unit 1；
Stroke attenuation coefficient of the k between the reciprocal roll shifting period, unit 1；
B is roll shifting periodic term, for controlling roll shifting periodicity and the rolling block number in each roll shifting period, unit 1；
C is anti-duplicate keys, for preventing the repetition of roll shifting value in the period, unit 1.
The setting meaning of anti-duplicate keys is, by giving one dislocation value of SIN function, can largely reduce
Roll shifting is worth duplicate probability, is conducive to further homogenize worn roll shape.
In above-mentioned parameter, priming stroke L value range is 0mm~150mm；
Stroke attenuation function F (t), codomain range are (0.5,0.9)；
Stroke attenuation coefficient k, value range are (0.65,1)；
Reciprocal roll shifting periodicity t, value range are { 2,3,4 }；
Roll shifting periodic term B, value range are (0.1256,0.628)；
Anti- duplicate keys C, value range are (- B, 0).
After sinusoidal roll shifting control method provided by the invention is put into F5 rack upper roller and lower roll, to upper roller and lower roll
Wear data analyzed, discovery upper roller abrasion condition improves very much, and cat ear height maxima reduces 11%, lower roll cat ear
Height is basically unchanged.It can be seen that the present invention is improving abrasion, extend certain significant effect in terms of rolling milimeter number.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. variable step roll shifting control method in a kind of period for hot rolling downstream rack working roll, it is characterised in that: this method
In belt steel rolling production process, roll shifting is carried out according to pre- fixed step size after the completion of each piece of rolled piece rolling, is reached forward or backwards
After maximum roll shifting travel position upper working rolls and lower working rolls roll shifting direction carry out reversely, be with the position that upper working rolls and lower working rolls coincide
Point, it is single for turning again to the position that upper working rolls and lower working rolls coincide after positive and reversed maximum roll shifting travel position is each once
The reciprocal roll shifting period, wherein roll shifting is carried out using the roll shifting step-length of variation within the single reciprocal roll shifting period；
It is altered to roll shifting forward direction and reversed maximum travel position the position that the roll shifting step-length of the variation coincides from upper working rolls and lower working rolls
Roller step-length is gradually reduced；
The roll shifting step-length of the variation passes through priming stroke, four stroke attenuation function, roll shifting periodic term and anti-duplicate keys parts
The change in location of control, roll shifting operation is realized in the form of SIN function；The wherein form of SIN function are as follows:
li=LF (t) sin (iB ± C) (1)
Wherein,
F (t)=kt-1 (2)
Wherein:
I is the block number of rolled band steel, unit 1；
liTo roll roll shifting value when i-th piece of strip, unit mm；
L is priming stroke, for controlling the stroke in first reciprocal roll shifting period, unit mm；
F (t) is stroke attenuation function, for controlling the rate of decay of roll shifting stroke, unit 1；
T is reciprocal roll shifting periodicity, unit 1；
Stroke attenuation coefficient of the k between the reciprocal roll shifting period, unit 1；
B is roll shifting periodic term, for controlling roll shifting periodicity and the rolling block number in each roll shifting period, unit 1；
C is anti-duplicate keys, for preventing the repetition of roll shifting value in the period, unit 1；
The anti-duplicate keys C, value range are (- B, 0).
2. variable step roll shifting control method in the period according to claim 1 for hot rolling downstream rack working roll,
Be characterized in that: the priming stroke L value range is 0mm~150mm.
3. variable step roll shifting control method in the period according to claim 1 for hot rolling downstream rack working roll,
Be characterized in that: the stroke attenuation function F (t), codomain range are (0.5,0.9).
4. variable step roll shifting control method in the period according to claim 1 for hot rolling downstream rack working roll,
Be characterized in that: the stroke attenuation coefficient k, value range are (0.65,1).
5. variable step roll shifting control method in the period according to claim 1 for hot rolling downstream rack working roll,
Be characterized in that: the reciprocal roll shifting periodicity t, value range are { 2,3,4 }.
6. variable step roll shifting control method in the period according to claim 1 for hot rolling downstream rack working roll,
Be characterized in that: the roll shifting periodic term B, value range are (0.1256,0.628).
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| CN201710247375.1A CN106862278B (en) | 2017-04-14 | 2017-04-14 | For variable step roll shifting control method in the period of hot rolling downstream rack working roll |
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Families Citing this family (10)
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| CN107824617B (en) * | 2017-09-26 | 2019-06-21 | 北京科技大学 | A kind of asynchronous roll shifting control method for hot continuous rolling downstream rack working roll |
| CN108273853B (en) * | 2018-01-19 | 2019-09-03 | 山东钢铁集团日照有限公司 | A kind of continuous hot-rolling mill working roll intelligence roller shifting method |
| CN110883102B (en) * | 2019-11-29 | 2021-08-20 | 山东交通学院 | Working roll shifting method for hot-rolled strip steel under same-width rolling condition |
| CN112588822B (en) * | 2020-11-03 | 2021-10-29 | 北京科技大学 | Hot continuous rolling mill model and plate shape control method |
| CN113263058B (en) * | 2021-04-23 | 2021-12-03 | 北京科技大学 | Roll shifting control method of hot continuous rolling finishing mill group considering hot roll shape |
| 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 |
| CN113263059A (en) * | 2021-05-20 | 2021-08-17 | 唐山全丰薄板有限公司 | Asynchronous double-attenuation roll shifting control method for hot-rolled sheet working roll |
| CN113798330A (en) * | 2021-08-30 | 2021-12-17 | 北京科技大学 | Asynchronous roll shifting method with double attenuation of roll shifting stroke and roll shifting step length of working roll |
| CN114535293B (en) * | 2022-01-19 | 2023-04-28 | 山西太钢不锈钢股份有限公司 | Rolling method for improving finish rolling plate shape |
| CN114798756B (en) * | 2022-04-13 | 2022-11-11 | 北京科技大学 | Multi-frame working roller shifting method for eliminating local high points of plate strip |
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