DE202013004842U1 - Roller for guiding a metal strand or metal strip - Google Patents

Abstract

A roll (1) for guiding a metal strand or strip, in particular in a rolling mill, a treatment line or a continuous casting plant, comprising: a cylindrical roll body (3) supporting the metal strand or the metal strip with a cylindrical roll surface (5) and two opposite end faces (5) 7, 9); on both end faces arranged roller pins (11, 13); extending from each of the two roller pins (11, 13) into the interior of the roller body (3) extending in blind-hole-shaped flow channels (15, 17); below the strand-supporting cylindrical surface (5) extending cooling channels (6) which extend substantially parallel to the center axis (A) of the cylindrical roller body (3); and connecting channels (8, 18) between the flow channels (15, 17) and the cooling channels (6); characterized in that connecting channels (8) of a first group of the connecting channels each of a first of the blind hole flow channels (15) in the direction of this first blind hole flow channel (15) opposite the first end face (9) and in the direction of the cylindrical surface (5) of Rolling body (3) and extending connecting channels (18) of a second group of the connecting channels each of a second of the two blind hole flow channels (17) in the direction of this second blind hole flow channel (17) opposite the second of the two end faces (7) and in the direction of the cylindrical Surface (5) of the roller body (3) extend.

Description

Field of the invention

The present invention is directed to a roll for guiding a metal strand or strip.

State of the art

Numerous rolls, which can be cooled in particular via flow channels, are known from the prior art.

The European patent application EP 0 543 531 A1 discloses a roll coolable from within by a coolant. In this case, the roller has channels running parallel to the surface of the roller jacket, as well as further central channels, which extend in a blind-hole-like manner from the roller pins along the center axis of the roller into their body. Connecting channels extend from the ends of the blind-hole-like, central channels to the cooling channels running parallel to the surface of the roller jacket.

A disadvantage of such an arrangement is, for example, that with relatively short rollers, that is rollers with a large diameter-to-length ratio, the connecting channels can no longer be introduced, in particular because the roller shoulder or roller journal for reasons of strength not arbitrarily thin let shape. Furthermore, the cooling performance of this concept can still be improved.

The German patent application DE 10 2008 029 944 A1 discloses a modular strand guide roller, which includes near-surface flow channels and centrally through the roller pin extending blind hole-like channels. Furthermore, this special roller comprises connecting channels, which run from both blind-hole-like channels of the roller to ends of the near-surface flow channels on one of the end faces of the rollers.

A disadvantage of such an arrangement may not be sufficient cooling performance, since the cooling water flows through the lying close to the roller surface cooling channels in series and thus some of these channels are flowed through with already heated water, resulting in damage to tape or strand or the roller shell can result.

Consequently, the technical problem of overcoming at least one of the above disadvantages.

Further, the technical problem may be to provide a roll which is coolable despite a large diameter-to-length ratio with high cooling efficiency.

Furthermore, the technical problem may also be to provide a compact coolable roll, which is preferably finished with little effort.

Disclosure of the invention

The asked technical problem is solved by a roller according to the features of claim 1.

This is directed to a roll for guiding a metal strand or strip, in particular in a rolling mill, a treatment line or a continuous casting plant, wherein the roller has a cylindrical roll body supporting the metal strand or the metal strip with a cylindrical roller surface and two opposite end faces with roller pins arranged thereon and stick out of each of the two roller pins from blind hole-shaped flow channels in the interior of the reel body into it. Further, the roller below the strand-supporting cylindrical surface extending cooling channels, which extend substantially parallel to the center axis of the cylindrical roller body and connecting channels between the flow channels and the cooling channels. According to the characterizing part of claim 1, each connecting channel of a first group of connecting channels extends from a first of the blind hole-shaped flow channels (obliquely or diagonally) in the direction of the first end face opposite this first blind hole-shaped flow channel and in the direction of the cylindrical surface of the reel body. In addition, connecting channels of a second group of connecting channels extend from a second of the two blind-hole-shaped flow channels (obliquely or diagonally) in the direction of the second of the two end faces opposite this second blind hole-shaped flow channel and in the direction of the cylindrical surface of the reel body.

As a result of this arrangement, flat angles between the connecting channels and a direction parallel to the roller axis can be achieved, in particular with short rollers or roller bodies. In other words, a so-called revolver cooling can thus also be made possible for short reel bodies.

In a preferred embodiment, each of the connection channels of the first group opens in a first blind hole-like Flow channel facing away end of a cooling channel. In principle, other mouth regions are conceivable, although the cooling and the construction of the roll is improved if the connecting channels open as described in the said end regions.

In a further preferred embodiment, the roller comprises at least one distributor channel which connects at least one of the cooling channels to at least one connecting channel of the second group of connecting channels. In this case, the distribution channel may be formed, for example, by a closed channel or by a plurality of individual channels, which in each case connects a connection channel of the second group of the connection channels to one of the cooling channels.

In a further preferred embodiment of the invention, the roller comprises a distributor channel which connects all ends of the cooling channels directed towards the first end side of the roller body.

Additionally or alternatively, the roller may comprise a further or different distribution channel which connects all ends of the cooling channels directed towards the second end side of the roller body. Such a channel is not necessarily needed.

In a further preferred embodiment, the cooling channels are arranged concentrically around the roller axis in a plane considered perpendicular to the roller axis. However, the shape of the cooling channels is not concentric. Instead, their cross sections are arranged concentrically around the central roller axis. Additionally or alternatively, the blind-hole-shaped flow channels can run along or on the center axis of the roller.

In a further preferred embodiment, the distribution channel or the further distribution channel for connecting the ends of the cooling channels to a closed or in particular annular shape. Such a distribution channel may be formed, for example, as a closed by a covering, for example, milled groove. The covering means may comprise a seal, in particular a rubber seal or be formed for example by a welded-on metal piece.

In a further preferred embodiment, the cooling channels and / or the connecting channels are formed as bores introduced into the roller body, wherein openings formed by the introduction of the bores on the surface of the roller body are sealed closed. Holes can be particularly cost-effective and easily subsequently introduce into the reel body. The sealing of the openings can be done by pressed plugs. Alternatively or additionally, the openings could be welded, for example.

In a further preferred embodiment, the angle of inclination of each connecting channel, measured between the axial direction of the roller and the connecting channel, is less than 35 °, preferably less than 30 ° or even less than 25 °.

In a further preferred embodiment, the roller body of the roller has a diameter-to-length ratio of more than 1: 5 and preferably more than 1: 2. Especially with such roles, the arrangement described allows effective cooling.

In a further preferred embodiment, the connection channels each extend substantially rectilinearly. Alternatively or additionally, the connection channels of the first group and the connection channels of the second group in the middle of the roller or of the roller body intersect without collision. In other words, the center of the roller or of the roller body can also be described as a center plane perpendicular to the roller axis. Viewed in such a median plane, the cross sections of the connecting channels of both groups are preferably located on a circle arranged concentrically around the center axis of the roller. The connecting channels of the first and the second group are preferably arranged alternately on this circle.

In other words, the connection channels of each group may extend from a respective blind hole-shaped flow channel on the surface of a cone towards an end portion or ends of the cooling channels or towards a distribution channel connecting the cooling channels. Preferably, the connecting channels are arranged distributed uniformly on such a conical surface, that is, with equal angular intervals between adjacent connecting channels on the conical surface. Preferably, the number and / or angular intervals of the connection channels of each of the two groups are the same. In this case, a connecting channel of the first group preferably extends through an angular range between two adjacent channels of the second group and correspondingly a channel of the second group through an angular range between two adjacent channels of the first group. In other words, the two (oppositely directed or intersecting) cone surfaces on which the connection channels are arranged can be half the angular range between two adjacent ones Connecting channels of a group to be rotated around the center axis of the roll.

In a further preferred embodiment, the roller comprises n cooling channels and 2n connection channels, wherein n connection channels belong to the first group of connection channels and the remaining n connection channels belong to the second group of connection channels. However, fewer connection channels are conceivable. However, the constellation described in this embodiment can allow a particularly uniform cooling effect.

In a further preferred embodiment, adjacent connecting channels are spaced from each other in an angular range of 360 ° / 2n in a plane considered perpendicular to the center axis of the roller. By such an arrangement is an even distribution of the connecting channels (viewed in the circumferential direction) before. As a result, the homogeneity and performance of the cooling can be further improved.

In another preferred embodiment, n is between 4 and 12, and preferably between 6 and 10. In particular, n = 8.

Finally, the present invention may also be directed to a strand guiding device for guiding a metal strand, a rolling mill for rolling metal or also a metal strip treatment device for straightening or coating metal strip with a roll according to one of the preceding embodiments.

All features of the embodiments described above can be combined with each other or replaced.

Brief description of the figures

The figures of the embodiments will be briefly described below. Further details can be found in the detailed description of the embodiments. Show it:

1 shows a perspective, partially transparent view of a roll according to a preferred embodiment of the invention;

2 shows a perspective, partially transparent view of the role according to 1 with flow emphasized by a first group of communication channels;

3 shows a perspective, partially transparent view of the role according to 2 with a highlighted, further course of the flow;

4 shows a perspective, partially transparent view of the role according to 3 with a highlighted, further course of the flow;

5 shows a perspective, partially transparent view of the role according to 4 with a highlighted, further course of the flow;

6 shows a perspective, partially transparent view of the role according to 5 with a highlighted, further course of the flow;

7 shows a perspective cross section along the center axis of the roller according to 1 ;

8th shows a further cross section along the center axis through the roller according to the 1 , whereas contrary to 7 in the 8th however, another cross-sectional plane is shown;

9 shows a perspective cross-section of the role according to 1 in a plane perpendicular to the roller axis; and

10 shows a section of a cross-section shown in perspective in the region of one of the two end faces of the roll according to 1 ,

Detailed description of the embodiments

The 1 shows a schematic perspective and semi-transparent view of a roll 1 according to a preferred embodiment of the invention.

The same role 1 is also in the cross sections or partial cross sections of 7 to 10 shown, so that these figures can also be consulted to understand the embodiment.

The 2 to 6 also show the role 1 according to the 1 and 7 to 10 where the flow of coolant through a series of flow channels 15 . 17 , Connecting channels 8th . 18 and cooling channels 6 is illustrated from figure to figure.

In all figures, therefore, identical reference numerals are used, although for reasons of clarity not all reference numerals are shown in principle in each figure.

Referring to the 1 includes the role 1 a reel body 3 with a cylindrical surface supporting a metal band 5 and on both sides of the reel body 3 arranged roller pins 11 . 13 only one of which is clearly visible in the view shown. Better are both roller pins 11 . 13 in the 7 recognizable. The reel body 3 is laterally through the end faces or end up 7 and 9 limited and preferably has a diameter D and a length L. The roller pins 11 . 13 extend along a central axis A of the roll 1 , Both the cones 11 . 13 as well as the reel body 3 can be formed essentially of metal, for example of steel.

In the roll pins 11 . 13 and the reel body 3 are preferably centrally arranged, blind hole-shaped channels 15 . 17 intended. These can be flowed through with coolant, for example water or other cooling liquids.

Referring again to the 1 For example, coolant can flow into the blind-hole-shaped flow channel 15 be initiated and according to 2 into a first group of connection channels 8th flow. Here are the connection channels 8th preferably with an end region of the flow channel 15 connected. In the variant shown by way of example, the roller comprises 1 eight connection channels B. Preferably, these connection channels 8th each at their ends, each with a cooling channel 6 connected, which in the 3 are highlighted. Thus, the connection channels extend 8th preferably from a first flow channel 15 diagonally in the direction of this first flow channel 15 opposite end face 9 the role as well as in the direction of the cylindrical surface 5 of the reel body 3 , In particular, they can each be in an end area 21 a cooling channel 6 open, which at the first blind hole-like flow channel 15 opposite end face 9 is located. The cooling channels 6 can under the surface of the cylindrical surface or lateral surface 5 of the reel body 3 lie. Your smallest distance to the roll surface 5 For example, it may be less than 20% or less than 10% of the roll body diameter D. The cooling channels 6 preferably run parallel to the surface 5 of the reel body 3 or parallel to the center axis A of the role 1 ,

Is the cooling medium in the cooling channels 6 it flows through these and arrives according to the example of 3 each at a front end 7 the roll located end 23 of each cooling channel 6 ,

In the preferred embodiment, the ends are 23 the cooling channels 6 , as in 4 shown with each other via an annular channel 20 connected.

As further in the 5 is shown extending from this annular channel 20 connecting channels 18 towards the opposite end 9 the role 1 towards the second blind hole-shaped flow channel 17 , In other words, a second group of connecting channels extends 18 from the second bag-shaped connection channel 17 (diagonal) in the direction of this connection channel 17 opposite end face 7 the role 1 as well as towards the roller body surface 5 , With regard to the flow of the coolant, therefore, the coolant flows out of the connection channels 18 , according to the emphasis in the 6 , in the flow channel 17 ,

In the 1 to 6 The flow of a coolant through a series of channels has been described. However, these channels could also be flowed through in reverse order by coolant.

Regarding the 7 is an example of the course of two connection channels 8th and 18 visible, noticeable. It is also clear that the two channels shown 8th . 18 not to be cut or penetrated by other channels per se.

The 8th shows a further cross section of the role 1 in the course of two connection channels 8th is exemplified.

The 9 shows a perspective cross section through a central plane E of the role 1 , This cross-section shows eight sections through eight cooling channels that extend parallel to the roller surface and 16 sections through 16 connection channels. Here are the connection channels of both groups 8th . 18 arranged alternately or alternately on a circular line which is concentric with the central axis A of the roller 1 lies. Thus, the connection channels of different groups extend in different angular ranges of the roller body 3 ,

Finally, the section of the shows 10 inter alia, a cross section through the above-described annular channel 20 , which at the ends or end portions 23 the cooling channels 6 followed. In other words, the channels open up 6 on the front side 7 of the reel body 3 in the channel 20 , This channel 20 can, for example, by a on the front page 7 introduced groove and be formed by a covering 25 be sealed so that a sealed coolant channel 20 is formed.

Above all, the embodiments described above serve to better understand the invention and should not be understood as limiting. The scope of protection of the present utility model application results from the claims for protection.

The features of the described embodiments can be combined or replaced with each other.

Furthermore, the features described can be adapted by the skilled person to existing circumstances or existing requirements.

LIST OF REFERENCE NUMBERS

1

role

3

roller body

5

cylindrical roller surface

6

cooling channel

7

second end face

8th

Flow channel of a first group of flow channels

9

first end face

11

roller pin

13

roller pin

15

blind hole-shaped flow channel

17

blind hole-shaped flow channel

18

Flow channel of a second group of flow channels

20

distribution channel

21

towards the first end face directed end portion of a cooling channel

23

towards the second end face directed end portion of a cooling channel

25

covering

A

Center axis of the roller or the roller body

D

Diameter of the cylindrical roller body

e

Center plane of the roller body perpendicular to roller axis

L

Length of the cylindrical roller body

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0543531 A1 [0003]
• DE 102008029944 A1 [0005]

Claims (17)

A role ( 1 ) for guiding a metal strand or strip, in particular in a rolling mill, a treatment line or a continuous casting plant, comprising: a cylindrical roll body supporting the metal strand or strip ( 3 ) with a cylindrical roller surface ( 5 ) and two opposite end faces ( 7 . 9 ); on both end faces arranged roller pins ( 11 . 13 ); from each of the two roller pins ( 11 . 13 ) out into the interior of the reel body ( 3 ) extending into blind hole-shaped flow channels ( 15 . 17 ); below the strand supporting cylindrical surface ( 5 ) running cooling channels ( 6 ), which are substantially parallel to the center axis (A) of the cylindrical roller body ( 3 ) extend; and connection channels ( 8th . 18 ) between the flow channels ( 15 . 17 ) and the cooling channels ( 6 ); characterized in that connecting channels ( 8th ) of a first group of the connecting channels in each case by a first of the blind-hole-shaped flow channels ( 15 ) in the direction of this first blind hole-shaped flow channel ( 15 ) opposite first end face ( 9 ) and in the direction of the cylindrical surface ( 5 ) of the reel body ( 3 ) and connecting channels ( 18 ) of a second group of the connecting channels in each case by a second of the two blind-hole-shaped flow channels ( 17 ) in the direction of this second blind hole-shaped flow channel ( 17 ) opposite second of the two end faces ( 7 ) and in the direction of the cylindrical surface ( 5 ) of the reel body ( 3 ). The roller according to claim 1, wherein each of the connection channels ( 8th ) of the first group in one of the first blind-hole-shaped flow channel ( 15 ) end region ( 21 ) of a cooling channel ( 6 ) opens. The roller according to claim 1 or 2, wherein the roller ( 1 ) at least one distribution channel ( 20 ), which at least in each case one of the cooling channels ( 6 ) with at least one connecting channel ( 18 ) of the second group of connection channels ( 18 ) connects. The roller according to any one of the preceding claims, wherein the roller ( 1 ) a distribution channel ( 20 ), all to the second end face ( 7 ) of the reel body ( 3 ) ends ( 23 ) of the cooling channels ( 6 ) or the role ( 1 ) comprises a further distribution channel, all to the first end face ( 9 ) of the reel body ( 3 ) ends ( 21 ) of the cooling channels ( 6 ) connects with each other. The roller according to one of the preceding claims, wherein the cooling channels ( 6 ) are arranged concentrically around the roller axis (A) in a plane considered perpendicular to the roller axis (A) and / or the blind-hole-shaped flow channels ( 15 . 17 ) along the central axis (A) of the roll. The roller according to claims 4 and 5, wherein the distribution channel ( 20 ) or the further distribution channel for connecting the ends ( 23 ) of the cooling channels ( 6 ) has a closed shape or is annular. The roller according to any one of claims 4 to 6, wherein the distribution channel ( 20 ) as a by a covering means ( 25 ) closed, milled groove is formed. The roller according to one of the preceding claims, wherein the cooling channels ( 6 ) and / or the connection channels ( 8th . 18 ) than into the reel body ( 3 ) introduced bores, wherein by introducing the bores on the surface of the roller body ( 3 ) resulting openings are sealed sealed. The roller according to one of the preceding claims, wherein the angle of inclination of each connecting channel ( 8th . 18 ) measured between the axial direction of the roller ( 1 ) and the respective connection channel ( 8th . 18 ) is less than 35 °, preferably less than 30 ° or even less than 25 °. The roller according to one of the preceding claims, wherein the roller body ( 3 ) of the role ( 1 ) has a diameter to length ratio of greater than 1: 5 and preferably greater than 1: 2. The roller according to one of the preceding claims, wherein the connecting channels ( 8th . 18 ) extend substantially rectilinearly and the connecting channels ( 8th ) of the first group and the connection channels ( 18 ) of the second group in the middle of the reel body ( 3 ) without collision. The roller according to any one of the preceding claims, wherein the roller ( 1 ) n cooling channels ( 6 ) as well as 2n connection channels ( 8th . 18 ) and wherein n connection channels of the first group of the connection channels ( 8th ) and the remaining n connection channels of the second group of connection channels ( 18 ). The roller according to claim 12, wherein, in a plane (E) considered perpendicular to the center axis (A) of the roller, adjacent connecting channels ( 8th . 18 ) are spaced from each other with an angular range of 360 ° / 2n. The roll according to claim 12 or 13, wherein n is between 4 and 12 and preferably between 6 and 10. The roller of claim 14, wherein n = 8. The roller according to one of the preceding claims, wherein the connection channels ( 8th . 18 ) of each group of connecting channels each lie on the lateral surface of a cone. A strand guide device for guiding a metal strand or a rolling mill for rolling metal or a metal strip treatment device for straightening or coating metal strip, comprising a roll ( 1 ) according to one of the preceding claims.

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