CN1062495C - Roller shape of axial movement capable of changing roll pass concavity and shape - Google Patents

Roller shape of axial movement capable of changing roll pass concavity and shape Download PDF

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Publication number
CN1062495C
CN1062495C CN95117449A CN95117449A CN1062495C CN 1062495 C CN1062495 C CN 1062495C CN 95117449 A CN95117449 A CN 95117449A CN 95117449 A CN95117449 A CN 95117449A CN 1062495 C CN1062495 C CN 1062495C
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China
Prior art keywords
roll
alpha
shape
delta
roll gap
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CN95117449A
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Chinese (zh)
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CN1150068A (en
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连家创
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东北重型机械学院南校
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Publication of CN1150068A publication Critical patent/CN1150068A/en
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Publication of CN1062495C publication Critical patent/CN1062495C/en

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Abstract

The present invention belongs to a four-roll or six-roll mill which relates to a roll profile which can change the roll seam convexity and can change a roll shape by the corresponding axial movement of an upper roll and a lower roll. The present invention discloses two roll profiles which can continuously change a convexity value of a corresponding edge in the middle of a roll seam as well as can change a roll curve shape according to requirements of a strip cross-sectional shape and a target board shape; when the technology is adopted, the board shape quality of hot-rolled strips and cold rolled strips can be further improved. Furthermore, the present invention has a significant meaning for changing a situation that the core technology of the present modern large-size cold heat continuous rolled machine is mainly depended on the import.

Description

A kind of roll profile that changes roll gap convexity and variable roll gap shape that moves axially

The invention belongs to the roll profile that a kind of four rollers or six-high cluster mill utilize top and bottom rolls to move to axial change roll gap convexity and can change roll gap shape.

For section convexity and the plate shape of controlling band, a kind of CVC (continuous variable convex) roll shape milling train has at first been invented by German SMS company, the diameter of its upper and lower roll be antisymmetric odd function cubic polynomial (see figure 1) promptly: In the formula: δ=δ o+ δ s, δ oBe the initial movable value of roller curve, δ sMovement value for the relative initial position of roll.

The formed unloaded roll gap S of above diameter function (y) is the conic section roll gap of symmetry, that is: S ( y ) A - D S ( y ) + D X ( y ) 2 = A - D + α 1 δ + α 3 δ ( 3 y 2 + δ 2 ) The convexity functional value of roll gap function S (y) the relative edge gap values between rollers S of portion (b) is: Δ S (y) b=S (y)-S (b)=3a 3δ (y 2-b 2) convex value of roll gap middle part relative edge portion is: Δ S (O) b=S (O)-S (b)=-3a 3δ b 2Therefore, change the convex value Δ S (O) that axial internal clearance δ just can change unloaded roll gap b, but can not change the shape of unloaded roll gap, because shown in the convexity functional value formula of roll gap function S (y) the relative edge gap values between rollers S of portion (b), the shape of its unloaded roll gap is the conic section of fixing, and can not change.Often need to change the distribution shape of roll gap curve in the actual production according to the requirement of load roll gap (band outlet section configuration) and plate shape, could guarantee the glacing flatness of sheet material, simple middle wave or symmetrical bilateral wave can only be controlled because change convex value, complex seas defective in 1/4th complicated waves or the limit can not be corrected.

The purpose of this invention is to provide a kind of convex value that can continuously change roll gap middle part relative edge portion, can change the roll profile of roll gap curve shape again according to the requirement of the Target Board shape of band section configuration.Main points of the present invention are: upper and lower roller diameter adopts antisymmetric SIN function and cubic polynomial combination of function compound function curve together: In the formula: a-can change the angle of roll gap curve shape;

The sinusoidal amplitude of C-.The formed unloaded roll gap S of compound function (y) the relative edge gap values between rollers S of portion (b) convexity functional value is: ΔS ( y ) b = C sin αδ b ( COS α b y - COSα ) - 3 α 3 δ ( y 2 - b 2 ) The convex value of roll gap middle part relative edge portion is: ΔS ( O ) b = C sin αδ b ( 1 - cos α ) + 3 α 3 δ b 2 The portfolio ratio of two kinds of functions and combined shaped are: ΔS ( y ) b ΔS ( O ) b = cos α b y - cos α ( 1 + ξ ) ( 1 - cos α ) + ξ 1 + ξ [ 1 - ( y b ) 2 ] In the formula: ξ = 3 α 3 δ b 2 C ( 1 - cos α ) sin α b δ Change the convex value Δ S (O) that axial internal clearance δ just can change roll gap b, and roll gap convexity function Δ S (y) b is one group of family of curves's (see figure 2) that plentiful degree is different when changing a value, rather than as cubic polynomial diameter function, be a fixing conic section.Therefore, roll profile provided by the invention can be selected needed a value according to the requirement of load roll gap shape and plate shape, to guarantee not only to control convex value, can guarantee that also the shape of roll gap distribution curve conforms with the requirement of band plate shape precision.

ξ represents the portfolio ratio of two kinds of functions.ξ=0 illustrates the roll shape of having only SIN function, does not have the cubic polynomial roll shape, and ξ=two kinds of functions of 1 explanation respectively account for half; ξ=2 have illustrated 1st/3rd, the SIN function roll shape, and so on.Like this, for the shape of roll gap curve, except selecting a value, increased the regulating measure of two kinds of curve portfolio ratios again, thereby more helped carrying out the optimal design of roll gap curve shape.

Drawings and Examples:

Fig. 1 moves axially the roll profile that changes the roll gap convexity

Fig. 2 SIN function roll shape roll gap distribution shape

Embodiment:

Present embodiment is disclosed to be that 1,850 four roller aluminium strip rolling mill axles move formula roll compound function roll shape.

Known: D=440mm, 2b=2050mm

According to technological requirement, Δ S (O) b=0~-0.4mm

According to rolling mill structure design ,-δ m<δ s<δ m, δ m=100mm. is by formula ΔS ( O ) b = C sin αδ b ( 1 - cos α ) + 3 α 3 δ b 2

Can determine δ o=-100mm.Require to select ξ=2, a=110 ° according to distribution shape.By above-mentioned two formula, can calculate C=0.27152mm, a 3=4.3055 * 10 -101/mm 2, determine a 1=-0.90843 * 10 -3So it is as follows to go up the roller diameter function: In the formula: δ=δ o+ δ s=-100+ (100~100) mm

Y=0~+1025mm

Major advantage of the present invention is that the roll design that makes axle move the formula roll is not only that roll gap is protruding Spend the method for designing of (or concavity) value, but increased the selection of roll gap curve shape. By In decision plate shape precision be not unloaded roll gap, but loading roll gap, therefore, for negative Carry roll gap and target flatness, not only carried out convex value, but also carried out the design of roll gap shape two aspects Further developing of plate shape control technology. The employing of this technology will further improve hot rolling With the strip shape quality in village and cold rolling strap village, for China's strip production brings huge economic benefit, And mainly rely on for the core technology that changes the present modernized Large Scale Cold continuous hot-rolling mill of China Introduction has the big meaning of weight.

Claims (1)

1, a kind of roll forming of the roll that changes roll gap convexity and variable roll gap shape that moves axially is characterized in that:
Upper and lower roller diameter be SIN function and cubic polynomial combination of function compound function together promptly: The convexity functional value of roll gap function S (y) the relative edge gap values between rollers S of portion (b) is: ΔS ( y ) b = C sin αδ b ( cos α b y - cos α ) - 3 α 3 δ ( y 2 - b 2 ) The convex value of roll gap middle part relative edge portion is: ΔS ( o ) b = C sin αδ b ( 1 - cos α ) + 3 α 3 δb x 2 The portfolio ratio of two kinds of functions is: ξ = 3 α 3 δ b 2 C ( 1 - cos α ) sin δ The roll gap shape of two kinds of combination of function: ΔS ( y ) b ΔS ( O ) b = cos α b y - cos α ( 1 + ξ ) ( 1 - cos α ) + ξ 1 + ξ [ 1 + ( y b ) 2 ]
CN95117449A 1995-11-10 1995-11-10 Roller shape of axial movement capable of changing roll pass concavity and shape CN1062495C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN95117449A CN1062495C (en) 1995-11-10 1995-11-10 Roller shape of axial movement capable of changing roll pass concavity and shape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN95117449A CN1062495C (en) 1995-11-10 1995-11-10 Roller shape of axial movement capable of changing roll pass concavity and shape

Publications (2)

Publication Number Publication Date
CN1150068A CN1150068A (en) 1997-05-21
CN1062495C true CN1062495C (en) 2001-02-28

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100413608C (en) * 2005-03-28 2008-08-27 宝山钢铁股份有限公司 Support roller matched with working roller curve of continuous variable convex rolling mill
CN101862757A (en) * 2010-06-25 2010-10-20 济南重工股份有限公司 Pinch roll for pipes and bars
CN101890429A (en) * 2010-07-22 2010-11-24 首钢总公司 Complete roll forming configuring method for wide flat steel hot rolling finish mill set

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CN100385446C (en) * 2006-04-18 2008-04-30 燕山大学 Roller type curve design method in thin narrow material smoothing and rolling process
JP4960009B2 (en) * 2006-05-09 2012-06-27 スチールプランテック株式会社 Rolling roll, rolling mill and rolling method
US8881569B2 (en) * 2006-06-14 2014-11-11 Siemens Vai Metals Technologies Gmbh Rolling mill stand for the production of rolled strip or sheet metal
CN101214501B (en) * 2007-12-27 2010-06-02 武汉钢铁(集团)公司 Working roll with consideration to strip steel convexity, edge drop control and abrasion control and using method
CN101885002B (en) * 2010-07-07 2011-09-21 北京科技大学 Method for designing roll shape of variable-crown working roll with quartic crown control capacity
CN102688889B (en) * 2011-03-23 2014-06-04 宝山钢铁股份有限公司 Intermediate roll form of cold continuous mill
CN103624087B (en) * 2013-11-29 2015-09-09 苏州有色金属研究院有限公司 The side direction being applicable to six roller intermediate calender rolls twitches the method for designing becoming convexity roller roll shape
CN107377634B (en) * 2017-07-19 2018-10-16 东北大学 A kind of hot-strip outlet Crown Prediction of Media method
CN109622905B (en) * 2019-02-19 2020-02-21 东北大学 Design method of high-order polynomial curve convex roller of bloom continuous casting withdrawal and straightening unit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87103686A (en) * 1986-06-16 1987-12-30 Sms舒路曼-斯玛公司 Produce the roller mill of rolled parts, particularly rolled strip
CN2044910U (en) * 1989-03-14 1989-09-27 北京科技大学 Roller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87103686A (en) * 1986-06-16 1987-12-30 Sms舒路曼-斯玛公司 Produce the roller mill of rolled parts, particularly rolled strip
CN2044910U (en) * 1989-03-14 1989-09-27 北京科技大学 Roller

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100413608C (en) * 2005-03-28 2008-08-27 宝山钢铁股份有限公司 Support roller matched with working roller curve of continuous variable convex rolling mill
CN101862757A (en) * 2010-06-25 2010-10-20 济南重工股份有限公司 Pinch roll for pipes and bars
CN101862757B (en) * 2010-06-25 2012-07-04 济南重工股份有限公司 Pinch roll for pipes and bars
CN101890429A (en) * 2010-07-22 2010-11-24 首钢总公司 Complete roll forming configuring method for wide flat steel hot rolling finish mill set
CN101890429B (en) * 2010-07-22 2011-12-28 首钢总公司 Complete roll forming configuring method for wide flat steel hot rolling finish mill set

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