EP2249977B1 - Roller device, particularly push roller frame - Google Patents

Description

Technical area

The invention relates to a rolling device, in particular a push roll stand for use in flat rolling, according to the preamble of claim 1, see for example DE - 124 85 99 B ,

State of the art

Roll stands are well known in the art. In this case, a flat rolling mill is usually designed so that there is a symmetrical deformation of the rolling stock between the work rolls. For this purpose, the roll diameter, the peripheral speed and the friction conditions of the two work rolls are chosen as equal as possible, so that there are only the slightest variations. Such rolling stands are for example by the DE 33 23 641 A1 known.

Furthermore, there are rolling stands, in which the peripheral speeds of the two work rolls are chosen differently. Such rolling devices are for example by the DE 28 33 990 known. In the case of so-called push rolls or asymmetrical rolls, the process conditions are not chosen to be equal but specifically unequal for the two work rolls. Although this has the advantage that the rolling force is reduced due to the shear effect, but it also involves disadvantages. These are the so-called ski formation, uneven metallurgical properties Considered over the sheet thickness and uneven loading of the drive trains of the rollers and possibly the motors.

This has the result that the push rolls in the production of sheets is virtually not used, because the disadvantages clearly outweigh the benefits.

Presentation of the invention, object, solution, advantages

It is the object of the present invention to provide a rolling device by means of which the disadvantages of the prior art can be reduced, if not prevented.

According to the invention the object is achieved by a rolling device with a stator and two sets of rollers with at least two rollers which are arranged in a stator of the rolling device, wherein between two rolls of the two sets of rolls a rolling stock for rolling is feasible, wherein at least the rolls of a set of rolls in the rolling direction viewed relative to the stator are displaceable, wherein between a roller bearing for receiving the rollers and the stator respectively on both sides of the roller bearing adjustment means are provided.

It is also expedient for the displaceable set of rolls to comprise at least two rolls, with adjusting means being arranged on both sides of the at least two rolls.

It is also advantageous if the adjusting means are arranged substantially at the level of the respective roller and / or the respective roller axis, viewed in the direction perpendicular to the rolling direction.

Furthermore, it is expedient if the displaceable roller set has a common roller bearing for at least two of its rollers, wherein the Adjusting means attack substantially at the height of the respective roller on the roller bearing, viewed in the direction perpendicular to the rolling direction.

Accordingly, it is advantageous if the upper roller set and / or the lower roller set is displaceable.

According to an inventive concept, it is expedient if at least one roller, such as, for example, the work rolls, of the upper and lower roller sets have a different diameter.

Furthermore, it is expedient if the adjustment means have hydraulic and / or mechanical adjustment mechanisms.

It is also expedient if the roll axes of the rolls of the roll sets are aligned parallel to one another.

It may also be advantageous if the rollers, in particular the work rolls, the two sets of rolls are operable at different speeds or peripheral roll speeds.

Advantageous developments are described in the subclaims.

Brief description of the drawings

Fig. 1

eine schematische Anordnung von Arbeitswalzen,

Fig. 2

eine schematische Anordnung von Arbeitswalzen,

Fig. 3

eine schematische Anordnung von Arbeitswalzen,

Fig. 4

eine schematische Anordnung von Arbeitswalzen,

Fig. 5

eine schematische Anordnung von Arbeitswalzen, und

Fig. 6

eine schematische Darstellung einer Walzvorrichtung.

The invention will be explained in more detail on the basis of an embodiment with reference to the drawings. Show it:

Fig. 1

a schematic arrangement of work rolls,

Fig. 2

a schematic arrangement of work rolls,

Fig. 3

a schematic arrangement of work rolls,

Fig. 4

a schematic arrangement of work rolls,

Fig. 5

a schematic arrangement of work rolls, and

Fig. 6

a schematic representation of a rolling device.

Preferred embodiment of the invention

The FIG. 1 schematically shows a representation 1 of two work rolls 2,3, which roll a rolling stock 4 with symmetrical arrangement of the rollers 2,3. In this case, the forming zone 5 of the rolling stock 4 is formed symmetrically.

The FIG. 2 schematically shows a representation 10 of two work rolls 11,12, which roll a rolling stock 13 with asymmetric rolling condition with symmetrical arrangement of the rollers 11,12. Here, the forming zone 14 of the rolling stock 13 is formed asymmetrically. The rollers 11 and 12 are formed differently large. The roller 11 has a smaller diameter than the roller 12. Although the rolling arrangement of the FIG. 2 a horizontal Walzgutauslauf, the Walzguteinlauf is formed asymmetrically and inclined down to the second roller 12.

The FIG. 3 schematically shows a representation 20 of two work rolls 21,22, which roll a rolling stock 23 with asymmetric rolling condition with symmetrical arrangement of the rollers 21,22. In this case, the forming zone 24 of the rolling stock 23 is again formed asymmetrically. The rollers 21 and 22 are again formed differently large. The roller 21 in this case has a smaller diameter than the roller 22. The rolling arrangement of FIG. 3 also has an asymmetrical Walzgutauslauf 25 and an asymmetric Walzguteinlauf 26, in which the inlet 26 is inclined downward and the spout 25 is inclined up to the first roller 22. It can be seen clearly that the rolling stock 23 does not run horizontally through the rolling stand, but offset from the horizontal offset and runs. Also, the rolling stock at the outlet 25 has a curvature.

The FIG. 4 schematically shows a representation 30 of two work rolls 31,32 that roll a rolling stock 33 with asymmetric rolling condition with symmetrical arrangement of the rollers 31,32. Here, the forming zone 34 of the rolling stock 33 is again formed asymmetrically. The rollers 31 and 32 are formed substantially the same size. The rolling arrangement of FIG. 4 also has an asymmetric Walzgutauslauf 35 and an asymmetric Walzguteinlauf 36, in which the inlet 36 is inclined downwards and the outlet 35 is coming from above inclined. It can clearly be seen again that the rolling stock 33 does not run horizontally through the roll stand, but rather moves in and out of the horizontal. A curvature of the rolling stock 33 at the outlet 35 is not available. This is achieved by the proper adjustment of the rolling parameters. As such rolling parameters, for example, the peripheral speeds of the work rolls can be adjusted accordingly.

The FIG. 5 schematically shows a representation 40 of two mutually offset work rolls 41,42, which roll a rolling stock 43 with asymmetric rolling condition with staggered arrangement of the rollers 41,42. The offset in the horizontal direction has the size R. In this case, the forming zone 44 of the rolling stock 43 is again formed asymmetrically. The rollers 41 and 42 are in this embodiment of FIG. 5 essentially the same size. The rolling arrangement of FIG. 5 also includes a horizontal stock outlet 45 and a horizontal stock inlet 46, wherein the inlet 46 and the outlet 45 are aligned substantially parallel. A curvature of the rolling stock 43 at the outlet 45 is also not available. Again, the peripheral speeds of the work rolls are selected accordingly.

The FIG. 6 schematically shows a rolling device 50, such as a rolling mill, in which in a stand 51, the rollers 52,53,54,55 are arranged with their sets of rollers 52,53 and 54,55. In this case, an upper set of rollers 52,53 and a lower set of rollers 54,55 is provided, in each of which the work rolls 53 and 54 on both sides of the rolling stock 56, the rolling stock 56 roll and reshape. In the embodiment of FIG. 6 the lower set of rolls is arranged substantially non-displaceably in the direction of the extent of the rolling stock 56, the rolls 54, 55 being mounted in their rolling bearings 57, 58. The rollers 52, 53 of the upper set of rollers are advantageously arranged to be displaceable in the rolling direction or in the direction of the extent of the rolling stock. For this purpose, the rollers 52,53 with their roller bearings 59,60 by means of the adjusting means 61 a, 61 b, 62 a, 62 b formed displaced. The adjusting means 61 a, 61 b, 62 a, 62 b may have mechanical and / or hydraulic adjusting means. These are arranged on both sides of the rolling bearings 59,60 and serve to support the rolling bearings 59,60 in the stator 51 and the position adjustment of the rollers 52,53 in the rolling direction. Furthermore, a mechanism 63 for mechanical adjustment of the upper rollers relative to the lower rollers and a bearing 64 for supporting the lower rollers can be seen.

In a further embodiment, instead of the upper rolls, the lower rolls may be displaceable and adjustable in the rolling direction. In a further embodiment, in addition to the upper rollers and the lower rollers in the rolling direction can be displaced and adjustable.

Due to the adjustability of the roll sets, both an operation of the roll stand can be made, in which the sets of rolls are not relatively shifted against each other in the rolling direction and continue to operate the rolling stand are made, in which the sets of rolls are shifted from each other.

It is particularly advantageous in a rolling device according to the invention, as in the device according to FIG. 6 in that the displaceable roller set 52, 53 at least two rollers, wherein adjustment means 61 a, 61 b, 62 a, 62 b are respectively disposed on both sides of the at least two rollers 52,53. The adjusting means 61a, 61b, 62a, 62b are arranged substantially at the level of the respective roller 52, 53. It is in FIG. 6 to recognize that the center or the axis of the respective roller is approximately in the region of the corresponding adjusting means 61a, 61b, 62a, 62b, viewed in the direction perpendicular to the rolling direction. In FIG. 6 the displaceable set of rollers 52, 53 have a common roller bearing 59, 60 for at least two rollers 52, 53, the adjustment means 61 a, 61 b, 62 a, 62 b engaging substantially at the level of the respective roller against the roller bearing 59, 60 in the direction of considered perpendicular to the rolling direction.

LIST OF REFERENCE NUMBERS

1

Representation of two work rolls

2

Stripper

3

Stripper

4

rolling

5

forming zone

10

Representation of two work rolls

11

Stripper

12

Stripper

13

rolling

14

forming zone

20

Representation of two work rolls

21

Stripper

22

Stripper

23

rolling

24

forming zone

25

Outlet of the rolling stock

26

Infeed of the rolling stock

30

Representation of two work rolls

31

Stripper

32

Stripper

33

rolling

34

forming zone

35

Outlet of the rolling stock

36

Infeed of the rolling stock

40

Representation of two work rolls

41

Stripper

42

Stripper

43

rolling

44

forming zone

45

Outlet of the rolling stock

46

Infeed of the rolling stock

50

rolling device

51

stand

52

roller

53

roller

54

roller

55

roller

56

rolling

57

roller bearings

58

roller bearings

59

roller bearings

60

roller bearings

61a

adjustment

61b

adjustment

62a

adjustment

62b

adjustment

63

Mechanism for employment

64

storage

Claims (14)

1. Rolling device (50) comprising a housing (51) and two roll sets (52, 53, 54, 55) with at least two rolls arranged in a housing (51) of the rolling device, wherein a rolling stock (56) for rolling can be led through between two rolls of the two roll sets, characterised in that at least the rolls (52, 53) of one roll set are displaceable in rolling direction as considered relative to the housing (51), wherein setting means (61 a, 61 b, 62a, 62b) are provided between a roll mounting for reception of the rolls and the housing on each of two sides of the roll mounting.
2. Rolling device according to claim 1, characterised in that the displaceable roll set comprises at least two rolls, wherein setting means are arranged on either side of the at least two rolls and wherein one of the rolls is a working roll and one of the rolls is a backing roll.
3. Rolling device according to claim 1, characterised in that the setting means are arranged substantially at the height of the respective roll or the respective roll axis.
4. Rolling device according to claim 1, characterised in that the displaceable roll set has a common roll mounting for at least two rolls, wherein the setting means engage the roll mounting substantially at the height of the respective roll.
5. Rolling device according to claim 1, characterised in that the upper roll set and/or the lower roll set is or are displaceable.
6. Rolling device according to any one of the preceding claims, characterised in that at least one roll of the upper roll set and at least one roll of the lower roll set, such as, for example, the working rolls, have a different diameter.
7. Rolling device according to claim 6, characterised in that the roll diameter of the working rolls lies in the range of 550 to 1400 millimetres, preferably in the range of 850 to 1200 millimetres.
8. Rolling device according to one of claim 6 and 7, characterised in that the difference in diameter of the working rolls is greater than zero, such as greater than 1%, and less than or equal to 50%, preferably between greater than zero, such as greater than 1%, and less than or equal to 10%.
9. Rolling device according to any one of the preceding claims, characterised in that the setting means comprise hydraulic and/or mechanical adjusting mechanisms.
10. Rolling device according to any one of the preceding claims, characterised in that the roll axes of the rolls of the roll sets are oriented parallelly to one another.
11. Rolling device according to any one of the preceding claims, characterised in that the rolls, such as, in particular, the working rolls, of the two roll sets are operable at different rotational speeds or roll circumferential speeds.
12. Rolling device according to any one of the preceding claims, characterised in that the different rotational speeds lie in the range between 1% and 20%, preferably between 5% and 10%.
13. Rolling device according to any one of the preceding claims, characterised in that the settable roll offset between the working rolls lies in the range between 0 millimetres or 10 millimetres and 200 millimetres, preferably between 50 millimetres and 120 millimetres.
14. Method of rolling with a rolling device according to any one of the preceding claims, characterised in that the thickness reduction of the rolling stock lies in the range between 1 millimetre and 75 millimetres, preferably between 5 millimetres and 25 millimetres.

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