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EP3328565A1 - Couronne de cylindre permettant d'éviter sélectivement les quarts d'ondes - Google Patents

Couronne de cylindre permettant d'éviter sélectivement les quarts d'ondes

Info

Publication number
EP3328565A1
EP3328565A1 EP16721836.1A EP16721836A EP3328565A1 EP 3328565 A1 EP3328565 A1 EP 3328565A1 EP 16721836 A EP16721836 A EP 16721836A EP 3328565 A1 EP3328565 A1 EP 3328565A1
Authority
EP
European Patent Office
Prior art keywords
rolls
rollers
contour
work rolls
work
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.)
Granted
Application number
EP16721836.1A
Other languages
German (de)
English (en)
Other versions
EP3328565B1 (fr
Inventor
Alois Seilinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Publication of EP3328565A1 publication Critical patent/EP3328565A1/fr
Application granted granted Critical
Publication of EP3328565B1 publication Critical patent/EP3328565B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/18—Adjusting or positioning rolls by moving rolls axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/142—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/18—Roll crown; roll profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/18—Roll crown; roll profile
    • B21B2267/20—Ground camber or profile
    • 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

Definitions

  • the present invention is based on a rolling mill for the production of flat rolled stock, in particular of metal strip,
  • rollers mounted in the rolling mill stands are rotatable about a respective axis of rotation
  • Such a roll stand is known for example from WO 03/022 470 AI.
  • the contour of one of the two axially displaceable rollers is formed by a first basic function, the contour of the other of the two
  • the basis functions are functions of the place seen in the direction of the respective axis of rotation. They are further determined such that they complement each other in the unloaded state of the two axially mutually displaceable rollers in a certain relative axial position and complementary at an outgoing from this axial position displacement Shifting direction form a convex or a concave roll gap profile.
  • contour-influencing measures are the use of roll bending devices, by means of which the rolling force application to the rolling stock and the thickness distribution over the width of the rolled material can be selectively influenced.
  • the bottle neck-like course of the bale contour is not only in work rolls, but also in intermediate rolls and
  • the rolling stand having work rolls supported on back-up rolls or intermediate rolls and back-up rolls,
  • each roller of at least one pair of rollers formed from a back-up roll and a work roll or from a back-up roll and an intermediate roll has a curved contour extending over the entire effective length of the bale, wherein the contour of the support roller is formed by a superimposition of a basic function with a concave or convex additional function,
  • a contour of the support roller according to the basic function in a non-displaced state to the adjacent work roll or intermediate roll is complementary and forms a convex or a concave difference profile at a shift depending on the direction of displacement.
  • the superimposition of the basic function with the additional function serves the purpose of reducing the maximum pressure acting on the work roll and the backup roll or on the intermediate roll and the backup roll, thereby increasing roll life and avoiding roll breaks as far as possible.
  • the additional function is a quadratic function.
  • the rolling stand having work rolls supported on back-up rolls or intermediate rolls and back-up rolls,
  • bale contours complement each other exclusively in a certain relative axial position of the rollers of the roller pair in the unloaded state
  • the support rollers have a complementary bale contour and in the unloaded state, a partial or complete complement of the bale contours of the support rollers and the immediately adjacent work rolls or intermediate rolls occurs.
  • WO 2007/144 161 AI discloses a similar disclosure content.
  • rolling stock it is usually the endeavor that the rolling stock after rolling has a predetermined profile and is still flat.
  • unevenness in the rolling stock can occur when the rolling stock is relatively thin and during the respective rolling pass the relative profile of the rolling stock
  • the object of the present invention is to provide a rolling mill, in which by axial displacement of rollers, the shape of the roll gap, ie the thickness profile of the roll gap over the bale length, is varied such that a highest quality standards fulfilling, flat and wave-free rolling is achieved.
  • the object is achieved by a rolling mill with the features of claim 1.
  • Advantageous embodiments of the rolling stand according to the invention are the subject of dependent claims 2 to 4.
  • a roll stand of the type mentioned is configured by
  • That one of the two axially mutually displaceable rollers has a first contour, which is formed by a superposition of a first basic function and a first additional function
  • the contour shift lies within the actually achievable displacement range of the two rollers which are axially displaceable relative to one another.
  • the contour shift may be outside the actual reachable displacement range.
  • the two basic functions always form a convex or always a concave roll gap profile independently of the actual displacement. In this case, only in the mathematical sense, a sign reversal is possible.
  • the inventive design of the two axially displaceable rollers facilitates both the mathematical description of the contours of the two axially against each other sliding rollers as well as the production engineering production of the contours of the two axially mutually displaceable rollers.
  • the additional functions are symmetrical to each other.
  • the two axially mutually displaceable rollers can be ground in the same manner and only one of the two rollers must be installed with respect to the other rotated by 180 ° in the rolling mill.
  • the roll stand has no further rolls other than the work rolls.
  • the work rolls are supported directly or via intermediate rolls on support rolls.
  • the contours of the back-up rolls can be provided with an inverse additional contour, so that the back-up rolls complement each other in an uncomplicated, unloaded state.
  • the contours of the support rollers differ from those of the work rolls in particular by a concave difference.
  • the contours of the intermediate rolls may be different from those of the work rolls and / or back-up rolls by such a concave difference.
  • maximum pressures acting between adjoining rollers can be minimized.
  • a flat rolling stock 2 is to be rolled and thereby produced.
  • the rolling stock 2 may consist in particular of metal, for example of aluminum or steel. It can be a band or a heavy plate.
  • the roll stand 1 has a roll stand 3.
  • a first and a second work roll 4, 5 are mounted in the rolling mill stands 3 in the rolling mill stands 3.
  • the work rolls 4, 5 are - as is common practice - stored in the rolling stand 3 such that the work rolls 4, 5 are rotatable about a respective axis of rotation 6, 7.
  • the rotation is effected by means of a common drive assigned to the work rolls 4, 5 or by drives assigned to each of the work rolls 4, 5.
  • the drive is or the drives are not shown in the FIG.
  • the first work roll 4 is shown in FIG 1 and 2, the upper work roll m.
  • the second work roll 5 is the lower work roll.
  • the reverse assignment is also possible.
  • the roll stand 1 except the work rolls 4, 5 has no further rolls (Duogerüst).
  • the work rolls 4, 5 are supported on support rolls 8, 9 as shown in FIGS. 1 and 2. It is possible, as shown in FIG. 1, that the rolling stand 1 has no further rollers other than the work rolls 4, 5 and the support rolls 8, 9 (for example, in the case of a
  • the work rolls 4, 5 are supported directly on the support rollers 8, 9.
  • the roll stand 1 additionally has intermediate rolls 10, 11.
  • the work rolls 4, 5 are supported on the support rolls 8, 9 via the intermediate rolls 10, 11.
  • the other rollers - ie the support rollers 8, 9 and, if appropriate, also the intermediate rollers 10, 11 - are in the
  • Roll stand 3 stored so that they are rotatable about a respective axis of rotation.
  • Two of the rollers 4, 5, 8, 9, 10, 11 are mounted in the rolling stand 3 such that they are axially against each other.
  • the two axially displaceable rollers are the work rolls 4, 5. The displacement is thus in the direction of the axis of rotation 6, 7.
  • the displaceability is shown in FIG 1 by corresponding double arrows at the work rolls 4, 5 indicated.
  • the two axially displaceable rollers are generally the intermediate rollers 10, 11.
  • the displaceability is indicated in FIG. 2 by corresponding double arrows in the intermediate rollers 10, 11.
  • the work rolls 4, 5 have in this case, as a rule, a relatively small diameter and are cylindrical or (symmetrically) slightly spherical. In individual cases, however, can
  • the corresponding rollers 4, 5 and 10, 11 furthermore have, as shown in the equations given above or below the respective roller 4, 5 and 10, 11 in FIG. 3 for the radius R 1, R 2 of the respective roller 4, 5 and 5, respectively 10, 11, each has a curved contour which extends over the entire effective length of the bale.
  • the radii Rl, R2 as a function of the location x along the axes of rotation 6, 7 correspond to the contours of the rollers 4, 5 and 10, 11th
  • the two axially mutually displaceable rollers 4, 5 and 10, 11, according to FIG. 3, initially have a base radius R0.
  • the base radius R0 is constant, ie no function of the location x along the axis of rotation 6 of the first work roll 4 or the location x along the axis of rotation 7 of the second work roll 5 or the axes of rotation of the intermediate rolls 10, 11.
  • This base radius R0 is in the case of first work roll 4 (or the first work roll 4 adjacent intermediate roll 10) superimposed on a first basis function Bl, in the case of the second work roll 5 (or the second work roll 5 adjacent intermediate roll 11) has a second basic function B2.
  • the basic functions B1, B2 are functions of the location x in the direction of the respective rotation axis 6, 7.
  • the basic functions Bl, B2 are preferably, with respect to the center of the bale, antisymmetric to each other. So these are odd functions in the mathematical sense.
  • the relation Bl (x) -B2 (-x) holds.
  • the basic functions Bl, B2 are determined so that they complement each other in the unloaded state of the respective rollers 4, 5 and 10, 11 in a certain relative axial position of the respective rollers 4, 5 and 10, 11 complementary and at one of this axial position outgoing shift depending on the direction of displacement form a convex or a concave roll gap profile.
  • the relationships apply to the first basic function B1 and the second basic function B2 according to FIG.
  • x is the location or the axial position, relative to the center of the bale, A is a contour amplitude,
  • B is a contour gradient
  • the importance of these variables is explained in the aforementioned WO 03/022 470 AI.
  • the reference length L Ref may be identical to the ball length L. Alternatively, it can be a different value.
  • the basic functions Bl, B2 are determined such that they complement each other in the unloaded state of the corresponding rollers 4, 5 or 10, 11 in a specific relative axial position of the corresponding rollers 4, 5 and 10, 11 complementary. This axial position is reached when the first work roll 4 (or the first work roll 4 adjacent intermediate roll 10) is displaced in the positive direction by the contour displacement c and the second work roll 5 (or the second work roll 5 adjacent intermediate roll 11) in negative Direction is shifted by the contour shift c.
  • the basic functions Bl, B2 form a convex roll gap profile.
  • displacement of the first work roll 4 (or the intermediate work roll 10 adjacent to the first work roll 4) in the negative direction and, corresponding thereto, the second work roll 5 (or the intermediate work roll 11 adjacent to the second work roll 5) is positive Direction takes place, form the basis functions Bl, B2 a concave roll gap profile.
  • the basic functions Bl, B2 relative to the center of the bale, are antisymmetrical to one another.
  • the first basic function Bl is also an additional function ZI superimposed.
  • the second basic function B2 is additionally superimposed with an additional function Z2.
  • the additional functions ZI, Z2 are shown in FIG 3 - analogous to the basic functions Bl, B2 - functions of the place x in the direction of the respective axis of rotation 6, 7th
  • ⁇ and ⁇ are weighting factors, which usually have a value between 0 and 2.
  • the limits 0 and 2 can be assumed with. In individual cases even larger or even smaller values can be assumed.
  • the weighting factors ⁇ , ⁇ can be determined independently of each other. Both weighting factors ⁇ , ⁇ preferably have the value 1. This has the advantage that the additional functions ZI, Z2 are symmetrical to each other.
  • C and D are proportional factors. As a rule, the proportion factor C has a value above zero. The proportion factor D may be 0, greater than zero, or less than zero as needed.
  • the sum of the additional functions ZI, Z2 is thus, based on the center of the bale of the two axially mutually displaceable rollers 4, 5 and 10, 11, a symmetrical, mutually monotonous function.
  • the first basic function B1 is a trigonometric function, which is superimposed on a linear function.
  • the trigonometric function may in particular be a sine function.
  • the sum of the additional functions ZI, Z2, however, is a polynomial function.
  • the polynomial function as seen from the center of the bale and in the direction of the respective axis of rotation 6, 7, has at least a second degree component.
  • the proportion factor D has a value other than 0 - the polynomial function also has a fourth degree component.
  • the resulting course of the roll gap g has on the one hand a convex or concave portion, which is dependent on the displacement s, namely the proportion
  • the resulting course of the roll gap g has a further convex or concave portion, which is not dependent on the displacement s, namely, in the case that the proportion factor D has the value 0, the proportion
  • FIG. 4 shows a similar embodiment to FIG. 3.
  • the first basic function B1 is a polynomial function.
  • the sum of the additional functions ZI, Z2 is a trigonometric function.
  • the trigonometric function according to FIG. 4 can be a cosine function, ⁇ being a suitably chosen factor.
  • the configurations according to FIGS. 3 and 4 are combinable with one another insofar as the additional functions Z1, Z2 can be selected independently of the basic functions B1, B2.
  • the additional functions Z1, Z2 are therefore not necessarily polynomial functions. It could also be trigonometric functions, in particular trigonometric functions according to FIG 4.
  • the additional functions ZI, Z2 are not necessarily trigonometric functions. It could also be polynomial functions, in particular polynomial functions according to FIG. 3.
  • FIG. 5 shows purely by way of example for the embodiment according to FIG. 3 the deviation of the resulting roll gap g from an average value. It can be seen in particular from FIG. 5 that a very uniform profile can be achieved to a considerable extent as a result of the superposition of the basic functions B1, B2 with the additional functions Z1, Z2. By a corresponding determination of the proportion factors C and D, the maxima 12 of the deviation can be further influenced both with respect to their position in the direction of the rotation axis 6, 7 and with respect to their height. As already mentioned and illustrated in FIG. 1, support rollers 8, 9 are often present in addition to the work rolls 4, 5.
  • the work rolls 4, 5 are the axially displaceable rollers, it is possible in this case that the contours of the intermediate rolls 10, 11 of those of the work rolls 4, 5 and / or the support rollers 8, 9 to distinguish a concave difference.
  • FIG. 7 the differences being clearly exaggerated in FIG. 7 analogous to FIG.
  • the intermediate rolls 10, 11 are the axially displaceable rolls, it is possible - analogously to the situation with a quarto scaffolding - that the contours of the support rolls 8, 9 are different from those of the intermediate rolls 10, 11 distinguish a concave difference.
  • the present invention has many advantages.
  • the adjustment range achievable by moving the work rolls 4, 5 should be between -400 ym and -100 ym, this can be achieved by setting the setting range between +300 ym and +600 ym using only the basic functions B1, B2 would lie, by the additional functions ZI, Z2, however, in addition a parabolic crowning of -700 ym is superimposed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Control Of Metal Rolling (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne un cage de laminoir (1) présentant des montants de cage de laminoir (3) dans lesquels sont montés des cylindres de travail (4, 5), ou des cylindres de travail (4, 5) et des cylindres d'appui (8, 9), ou des cylindres de travail (4, 5), des cylindres intermédiaires (10, 11) et des cylindres d'appui (8, 9). Les cylindres (4, 5, 8, 9, 10, 11) peuvent chacun tourner autour d'un axe de rotation (6, 7). Dans le cas d'une cage de laminoir (1) sans cylindres intermédiaires (10, 11), les cylindres de travail (4, 5) sont déplaçables l'un par rapport à l'autre respectivement dans la direction de leur axe de rotation (6, 7), c'est-à-dire axialement. Dans le cas d'une cage de laminoir (1) comportant des cylindres intermédiaires (10, 11), ceci s'applique aux cylindres de travail (4, 5) ou aux cylindres intermédiaires (10, 11). Les cylindres déplaçables axialement (4, 5 ou 10, 11) présentent une longueur de table utile (L). Ils présentent par ailleurs un contour incurvé (R1, R2) qui s'étend sur la totalité de la longueur de table utile (L). Les cylindres déplaçables axialement (4, 5 ou 10, 11) présentent chacun un contour incurvé (R1, R2) qui est formé par la superposition d'une fonction de base respective (B1, B2) et d'une fonction supplémentaire respective (Z1, Z2). Les fonctions de base (B1, B2) et les fonctions supplémentaires (Z1, Z2) sont des fonctions du point (x) dans la direction de l'axe de rotation (6, 7) concerné. Les fonctions de base (B1, B2) sont définies de telle manière que, en l'absence de charge sur les rouleaux déplaçables axialement (4, 5 ou 10, 11), elles se complètent de manière complémentaire dans une position axiale relative définie et, lors d'un déplacement partant de ladite position axiale, elles forment selon la direction de déplacement un profil d'espace entre cylindres convexe ou concave. La somme des fonctions supplémentaires (Z1, Z2), rapportée au centre de table des cylindres déplaçables axialement (4, 5 ou 10, 11) à l'état non déplacé, est une fonction symétrique, monotone de part et d'autre.
EP16721836.1A 2015-07-28 2016-05-12 Meule de cylindre destinee a l'evitement cible de quarts d'onde Active EP3328565B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15178612.6A EP3124130A1 (fr) 2015-07-28 2015-07-28 Meule de cylindre destinee a l'evitement cible de quarts d'onde
PCT/EP2016/060724 WO2017016695A1 (fr) 2015-07-28 2016-05-12 Couronne de cylindre permettant d'éviter sélectivement les quarts d'ondes

Publications (2)

Publication Number Publication Date
EP3328565A1 true EP3328565A1 (fr) 2018-06-06
EP3328565B1 EP3328565B1 (fr) 2019-12-11

Family

ID=53765115

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15178612.6A Withdrawn EP3124130A1 (fr) 2015-07-28 2015-07-28 Meule de cylindre destinee a l'evitement cible de quarts d'onde
EP16721836.1A Active EP3328565B1 (fr) 2015-07-28 2016-05-12 Meule de cylindre destinee a l'evitement cible de quarts d'onde

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP15178612.6A Withdrawn EP3124130A1 (fr) 2015-07-28 2015-07-28 Meule de cylindre destinee a l'evitement cible de quarts d'onde

Country Status (5)

Country Link
US (1) US10589328B2 (fr)
EP (2) EP3124130A1 (fr)
JP (1) JP6585278B2 (fr)
CN (1) CN107921496B (fr)
WO (1) WO2017016695A1 (fr)

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KR102708233B1 (ko) * 2019-02-15 2024-09-23 주식회사 케이씨텍 기판 연마 시스템
CN112588838B (zh) * 2020-11-10 2022-04-15 北京科技大学 适用于短行程窜辊非对称自补偿轧制工作辊及其实现方法
CN117483424B (zh) * 2023-11-17 2024-06-04 燕山大学 一种改善镁合金板边裂的可轴向移动异形轧辊及轧制方法

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Also Published As

Publication number Publication date
CN107921496B (zh) 2019-11-01
WO2017016695A1 (fr) 2017-02-02
JP2018525228A (ja) 2018-09-06
JP6585278B2 (ja) 2019-10-02
EP3328565B1 (fr) 2019-12-11
US10589328B2 (en) 2020-03-17
US20180200769A1 (en) 2018-07-19
CN107921496A (zh) 2018-04-17
EP3124130A1 (fr) 2017-02-01

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