CN101683657A - Roll forming of backup roll suitable for asymmetrical curve roll shape work roll - Google Patents
Roll forming of backup roll suitable for asymmetrical curve roll shape work roll Download PDFInfo
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- CN101683657A CN101683657A CN200810200734A CN200810200734A CN101683657A CN 101683657 A CN101683657 A CN 101683657A CN 200810200734 A CN200810200734 A CN 200810200734A CN 200810200734 A CN200810200734 A CN 200810200734A CN 101683657 A CN101683657 A CN 101683657A
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- roll
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- forming
- support roller
- roll forming
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Abstract
The invention relates to a rolling mill roll of a strip cold-rolling mill, in particular to a roll forming of a backup roll suitable for an asymmetrical curve roll forming work roll. The roll formingof a backup roll suitable for an asymmetrical curve roll forming work roll is formed by overlying two parts of curves, one part is a backup roll forming curve expressed by an even polynomial function,and the other part is the roll forming curve of a work roll; the roll forming of the work roll overlies to the roll forming curve of the backup roll expressed by the even polynomial function at certain ratio. During production, the roll forming curve of the work roll and the roll forming curve of the backup roll are staggered with a certain space when the work roll positively and negatively shifts; as the shifting amount of the work roll is not big, obvious dislocation between the roll forming of the backup roll and the roll forming of the work roll can be avoided. Thus, the backup roll of the invention has symmetrical roll forming and even abrasion after abrasion, thus avoiding or effectively lightening influence caused by asymmetrical abrasion.
Description
Technical field
The present invention relates to a kind of rolling mill roll of strip cold rolling mills machine, relate in particular to a kind of support roller roll forming that working roll has the strip cold rolling mills machine of asymmetrical curve roll forming that is suitable for.
Background technology
The strip material plays important effect as one of most important product of steel and iron industry in the national economic development.Board rolling practice at present shows, no matter how advanced milling train be equipped with plat control system and control device, still exists the belt plate shape of part kind, specification restive, and the roll that causes of the flatness defect limited problem of cycle of being on active service.The root of finding this problem by analysis is that the plate shape ability of regulation and control of milling train is limited under certain roll forming configuration, and the interior initial roll forming of roll of military service phase is because of the wearing and tearing deterioration.Therefore, for the milling train of having gone into operation, need to pay attention to and bring into play the plate shape adjusting function of the initial roll forming of support roller, with reduce even avoid the harmful effect of roller surface wearing and tearing roll forming and milling train plate shape regulation and control performance, continue to optimize and improve the plate shape regulation and control performance of milling train and be implemented in by the design of support roller roll forming and keep this performance in the whole military service phase.
Reasonably the design of roll shape curve can be alleviated roll longitudinal stress uneven phenomenon, reduces the wearing and tearing in the operation of rolling or makes its uniform wear, directly reduces cost, and reduces bad ratio defective product simultaneously, improves the production hit rate of quality product; Reasonably the design of roll shape curve can guarantee that final sheet material is even at horizontal thickness, make its unevenness, with plate difference and thickness deviation be up to state standards, international standard and even harsh user; Reasonably roll shape curve can help milling train to give full play to its function power, expands production capacity, and can develop some new varieties smoothly.
When support roller is that plain-barreled roll, working roll are not that plain-barreled roll (is the working roll of asymmetrical curve type, as CVC, CVC
+, SmartCrown, UPC) time, can cause the asymmetrical wear of support roller, that is to say that support roller fore side (WS side) is obviously different with driving side (DS side) wear extent, it is just big more that the local roller that work roll diameter is big presses power indirectly, wear extent is big, and the diameter difference of WS side and DS side reaches about 0.8mm when serious.Because the influence of asymmetric factors such as supplied materials wedge shape, strip running deviation also aggravates the asymmetrical wear of support roller easily.
The subject matter that asymmetrical wear brings has: 1) belt plate shape is asymmetric; 2) if there is closed loop feedback control, the depress inclining setting value is unstable, and it is bigger to fluctuate; The asymmetrical wear situation was serious when 3) support roller was on active service the later stage, the support roller axis tilts, cause between the tapered sleeve of filmatic bearing and the lining, changed the big or small and distribution in four throttling side seam cracks in static pressure chamber, may reduce the bearing capacity of quiet dynamic pressure oil film, aggravation starts problems such as difficulty and scaling loss filmatic bearing.
Research about support roller roll forming, shape of working roll at present has a lot, but the research that should join which type of support roller roll forming about working roll (referring to have the working roll of asymmetrical curve roll forming) but only, relevant patent has: Chinese patent 200510024680.1 discloses " a kind of backing roll of matched with working roller curve of continuous variable convex rolling mill ", and Chinese patent 200410008195.0 discloses " a kind of cooperation moves axially the backing roll roll shape that changes roll gap convexity working roll ".And continuous variable crown mill both domestic and external (CVC milling train) has a lot of covers, and therefore, this class has the working roll of asymmetrical curve roll forming should join the problem which type of support roller roll forming is a novelty, demand is big.
Summary of the invention
The object of the present invention is to provide a kind of support roller roll forming that is suitable for asymmetrical curve roll forming working roll, this support roller roll forming is on the basis that keeps milling train plate shape control ability, symmetry wearing and tearing when support roller is used, thus avoid or effectively alleviate the influence that asymmetrical wear brings.
The present invention is achieved in that a kind of support roller roll forming that is suitable for asymmetrical curve roll forming working roll, form by the stack of two parts curve, a part is the support roller roll shape curve of being expressed by the even polynomial function, another part is the roll shape curve of working roll, and described support roller roll shape curve expression formula is:
R
SWB(x)＝a×R
1(x)+b×R
2(x)
In the formula, R
SWB(x) for being suitable for the support roller roll forming of asymmetrical curve roll forming working roll;
R
1(x) the support roller roll shape curve for being expressed by the even polynomial function: its expression formula is: R
1(x)=A
2x
2+ A
4x
4+ A
6x
6+ A
8x
8+
R
2(x) be shape of working roll curve multinomial: R
2(x)=A
1X+A
2x
2+ A
3x
3+
X is a body of roll coordinate, is zero point with the roll surface center,
A, b are proportionality coefficient, and a is 0.8～1, and b is 0.3～0.7.
Support roller roll forming of the present invention is that the roll forming with working roll is added on the support roller roll shape curve of being expressed by the even polynomial function by a certain percentage, the working roll play of this moment is zero, in the production when the positive and negative play of working roll, shape of working roll curve and support roller roll shape curve certain distance that staggers.Because except that the HC milling train, the working roll shifting amount is little in cold rolling, can't cause the obvious dislocation of support roller roll forming and shape of working roll, so the positive and negative play of working roll can't cause tangible contact pressure inequality.Therefore support roller wearing and tearing of the present invention back roll forming symmetry, wearing and tearing evenly, thereby avoid or effectively alleviate the influence that asymmetrical wear brings.
Description of drawings
Fig. 1 is the support roller roll shape curve R that is expressed by the even polynomial function
1(x) and shape of working roll curve R
2(x) figure;
Fig. 2 is suitable for support roller (SWB support roller) the roll shape curve figure of asymmetrical curve roll forming working roll for the present invention;
Fig. 3 presses the power comparison diagram indirectly for the roller of the present invention and former roll forming.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
A kind of support roller roll forming (being called for short the SWB support roller) that is suitable for asymmetrical curve roll forming working roll is made up of the stack of two parts curve, and a part is the support roller roll shape curve of being expressed by the even polynomial function, and another part is the roll shape curve of working roll; That is to say that SWB support roller roll shape curve is: the roll surface roll forming is taken advantage of to be added to behind the proportionality coefficient and is gone up on the support roller lower roll surface roll forming on the top working roll, and bottom working roll lower roll surface roll forming is taken advantage of on the support roller that is added to down behind the same proportionality coefficient on the roll surface roll forming.Here the shape of working roll of mentioning is meant the shape of working roll with asymmetrical curve form, for example, and CVC roll forming (cube multinomial, odd function), CVC
+Roll forming (five power multinomials or higher power, odd function), SmartCrown roll forming (string function curve).
Described SWB support roller roll shape curve expression formula is:
R
SWB(x)＝a×R
1(x)+b×R
2(x)
In the formula, R
SWB(x) for being suitable for the support roller roll forming of asymmetrical curve roll forming working roll, i.e. SWB support roller roll forming;
R
1(x) the support roller roll shape curve for being expressed by the even polynomial function: its expression formula is: R
1(x)=A
2x
2+ A
4x
4+ A
6x
6+ A
8x
8+
R
2(x) be shape of working roll curve multinomial: R
2(x)=A
1X+A
2x
2+ A
3x
3+
X is a body of roll coordinate, is zero point with the roll surface center,
A, b are proportionality coefficient, and a is 0.8～1, and b is 0.3～0.7.
The span of proportionality coefficient a, b, a is 0.8～1, b is 0.3～0.7.R
1(x) be special-purpose support roller roll shape curve, it can improve horizontal rigidity of mill roll-gap and bending roller force regulation and control effect, and for keeping its control characteristic, the value of coefficient a should be bigger, greater than 0.8, smaller or equal to 1; The value of coefficient b directly influences the distribution that roller presses power indirectly, the distribution that roller presses power indirectly can influence the situation that support roller is worn and torn again, the b value is big more, and it is even more that roller presses power indirectly, helps alleviating the asymmetrical wear of support roller more, but the b value is big more, horizontal rigidity of roll gap and the regulation and control of bending roller force secondary can descend obvious more, and the b value can not be too big from this point of view, so b value value is between 0.3 to 0.7, help the support roller uniform wear, and don't as for the control ability that obviously reduces milling train.
SWB support roller roll forming of the present invention is that the roll forming with working roll is added on the support roller roll shape curve of being expressed by the even polynomial function by a certain percentage, the working roll play of this moment is zero, in the production when the positive and negative play of working roll, shape of working roll curve and support roller roll shape curve certain distance that staggers can not cause tangible contact pressure inequality.Therefore support roller wearing and tearing of the present invention back roll forming symmetry, wearing and tearing evenly, thereby avoid or effectively alleviate the influence that asymmetrical wear brings.
Embodiment
The support roller that is suitable for asymmetrical curve roll forming working roll of the present invention is applied on the 1420CVC cold continuous rolling of certain enterprise, uses in the 1st frame support roller.The stack amount is 50%, a=1, b=0.5.
The coefficient of roll forming is as follows:
(1) the support roller roll shape curve multinomial of 1420CVC cold continuous rolling the 1st frame (going up the lower roll surface of support roller):
R
1(x)＝4.751e
-8x
2-7.541e
-13x
4+3.977e
-18x
6 -675≤x≤675
(2) CVC shape of working roll curve multinomial (the last roll surface of top working roll):
R
2(x)＝-1.468e
-4x-4.934e
-8x
2+6.990e
-10x
3 -755≤x≤755
(3) SWB support roller roll shape curve multinomial (going up the lower roll surface of support roller):
R
SWB(x)＝R
1(x)+0.5×R
2(x)
＝-7.341e
-5x+2.284e
-8x
2+3.495e
-10x
3-7.541e
-13x
4+3.977e
-18x
6
-675≤x≤675
Referring to R among Fig. 1
1(x) and R
2(x) roll shape curve figure, and the SWB support roller roll shape curve figure among Fig. 3.The SWB roll forming of lower roll is in the stack of same ratio, and lower roll roll forming function and top roll roll forming function be along the y axial symmetry, and this is because of, R
1(x) roll forming of self left-right symmetry and up-down rollers is identical, the CVC curve left-right symmetry of upper working rolls and lower working rolls, therefore the lower roll roll forming and the top roll roll forming left-right symmetry of the SWB support roller that calculates.
The roller of SWB support roller of the present invention and former roll forming presses power indirectly and compares.Because roller presses power indirectly and distributes and to comprise two contents: roller presses uniformity and the roller that power distributes indirectly and presses the power peak value indirectly, the former influence roll mandrel to uneven wear, the latter influences peeling off of roll.Referring to Fig. 3, as can be seen from the figure, adopt the SWB support roller after, it is more even that roller presses the distribution of power indirectly, roller presses the power peak value indirectly and descends to some extent; Therefore SWB support roller roll forming of the present invention military service cycle of helping improving roll prolongs service life of roll, reduces production costs.
Production practices show, after the SWB support roller was used, the asymmetrical wear of support roller was decreased to 0.1mm by 0.5mm, support roller military service cycle stretch-out 10000 tons.
SWB support roller of the present invention is as long as the grinding of grinding roller workshop goes out corresponding roll forming, and easy to process, cost is low, goes for the strip cold rolling mills machine that working roll has the asymmetrical curve roll forming, as milling trains such as CVC milling train, SmartCrown.
Claims (1)
1, a kind of support roller roll forming that is suitable for asymmetrical curve roll forming working roll, it is characterized in that: described support roller roll forming is made up of the stack of two parts curve, a part is the support roller roll shape curve of being expressed by the even polynomial function, another part is the roll shape curve of working roll, and described support roller roll shape curve expression formula is:
R
SWB(x)＝a×R
1(x)+b×R
2(x)
In the formula, R
SWB(x) for being suitable for the support roller roll forming of asymmetrical curve roll forming working roll;
R
1(x) the support roller roll shape curve for being expressed by the even polynomial function: its expression formula is:
R
1(x)＝A
2x
2+A
4x
4+A
6x
6+A
8x
8+…；
R
2(x) be shape of working roll curve multinomial: R
2(x)=A
1X+A
2x
2+ A
3x
3+
X is a body of roll coordinate, is zero point with the roll surface center;
A, b are proportionality coefficient, and a is 0.8～1, and b is 0.3～0.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810200734A CN101683657A (en) | 2008-09-28 | 2008-09-28 | Roll forming of backup roll suitable for asymmetrical curve roll shape work roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810200734A CN101683657A (en) | 2008-09-28 | 2008-09-28 | Roll forming of backup roll suitable for asymmetrical curve roll shape work roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101683657A true CN101683657A (en) | 2010-03-31 |
Family
ID=42047152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810200734A Pending CN101683657A (en) | 2008-09-28 | 2008-09-28 | Roll forming of backup roll suitable for asymmetrical curve roll shape work roll |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985005A (en) * | 2015-03-13 | 2015-10-21 | 李慧峰 | Compensation method for asymmetric strip shape of strip rolling mill |
| CN105458012A (en) * | 2016-01-14 | 2016-04-06 | 北京科技大学 | Universal design method for roll shape of supporting roll in cooperation with high-order curve working roll |
| CN111957746A (en) * | 2020-09-02 | 2020-11-20 | 苏州市职业大学 | Roller for controlling strip plate shape and roller shape design method |
| CN114749490A (en) * | 2022-02-28 | 2022-07-15 | 首钢京唐钢铁联合有限责任公司 | Plate and strip rolling mill control method and related equipment |
-
2008
- 2008-09-28 CN CN200810200734A patent/CN101683657A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104985005A (en) * | 2015-03-13 | 2015-10-21 | 李慧峰 | Compensation method for asymmetric strip shape of strip rolling mill |
| WO2016145928A1 (en) * | 2015-03-13 | 2016-09-22 | 李慧峰 | Compensation method of asymmetric strip shape of strip rolling mill |
| US10189062B2 (en) | 2015-03-13 | 2019-01-29 | Huifeng Li | Compensation method for asymmetric plate profile of plate/strip rolling mill |
| CN105458012A (en) * | 2016-01-14 | 2016-04-06 | 北京科技大学 | Universal design method for roll shape of supporting roll in cooperation with high-order curve working roll |
| CN105458012B (en) * | 2016-01-14 | 2017-11-03 | 北京科技大学 | A kind of support roller roller shape general design method coordinated with high order curve working roll |
| CN111957746A (en) * | 2020-09-02 | 2020-11-20 | 苏州市职业大学 | Roller for controlling strip plate shape and roller shape design method |
| CN114749490A (en) * | 2022-02-28 | 2022-07-15 | 首钢京唐钢铁联合有限责任公司 | Plate and strip rolling mill control method and related equipment |
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Open date: 20100331 |