EP3906122B1 - Rolling apparatus - Google Patents

Description

The invention relates to a rolling device with a stand, at least two rolls which are attached to the stand by means of chocks and can be displaced relative to one another in the axial direction, and at least one axial displacement device which is assigned to a chock of at least one of the rolls and can act on this chock . The axial shifting device comprises a fixed block, a shiftable bending block and a shifting cylinder with which the bending block can be shifted relative to the fixed block.

According to the state of the art, rolls (eg work rolls and/or back-up rolls) can be used in rolling devices, which are shifted axially relative to one another in order to set different roll gap profiles. For example, this is off EP 1 648 626 B1 or EP 1 436 104 B1 known. An axial displacement device is used here, which can act, for example, on the work rolls of a rolling device or on its work roll chocks, for the purpose of the mentioned displacement, for example of the work rolls. The preamble of claim 1 is based on AT 509 455 A4 .

In the figures 4 and 5 a conventional axial displacement device 8 of a rolling device is shown. This device comprises a one-piece fixed block 10 (cf. 4 ) with a central guide bar 11, which runs horizontally. Above and below this guide web 10 retaining strips 17, 18 are formed on the fixed block. The one-piece solid block 10, which consists of the central guide web 11 and the two retaining strips 17, 18 is made as a T-shaped forged part.

The conventional axial displacement device 8 has an upper bending block 12 and a lower bending block 13 . These bending blocks 12, 13 are each arranged on either side of the central guide web 11 of the fixed block 10, and are slidably guided between the guide web 11 and the outer holding strips 17, 18. Within the bending blocks 12, 13 each displacement cylinder 14 are accommodated, the piston rods 15 fixed to an end plate 20 attached to the fixed block 10 are connected. By actuating this displacement cylinder 14, a displacement of the two bending blocks 12, 13 relative to the fixed block 10 or its central guide web 11 is achieved. This is in the perspective view of figure 5 illustrated.

In the conventional axial displacement device 8 according to the Figures 4-5 If, as explained, the fixed block 10 is designed in one piece, usually as a forged piece, this has the disadvantage of high raw part costs and limited availability if repairs are required. In addition, the production and assembly of this one-piece fixed block 10 is expensive. The design of this forged part is based on the highly stressed guide web 11, along which the two bending blocks 12, 13 are slidably guided.

Another disadvantage of this conventional axial displacement device 8 is that the displacement cylinders are integrated within the movable bending blocks 12,13. This necessitates hose connections for these shifting cylinders for the purpose of supplying the necessary operating resources (e.g. hydraulic oil). The integration of the shifting cylinders within the bending blocks also means that these blocks are long in accordance with the stroke of the shifting cylinders and thus disadvantageously require a large amount of space. Servicing or repairing the shifting cylinder requires dismantling the bending blocks, with the axial shifting system having to be almost completely dismantled using a dismantling device. This also disadvantageously leads to high costs.

Accordingly, the invention is based on the object of creating a rolling device in which an axial displacement device for adjusting the rolls can be produced with less effort and at lower cost.

This object is achieved by a rolling device specified with the features of claim 1. Advantageous developments of the invention are defined in the dependent claims.

A rolling device according to the present invention serves to be able to variably set a roll gap during rolling operation. Such a rolling device comprises a stand, at least two rolls, which are attached to the stand by means of chocks and can be displaced relative to one another in the axial direction, and at least one axial displacement device which is associated with a chock of at least one of the rolls and can act on this chock. The axial displacement device has a fixed block, at least one displaceable bending block and at least one displacement cylinder assigned to the bending block, with which the bending block can be displaced relative to the fixed block. The fixed block is designed in several parts.

The invention is based on the essential knowledge that, due to the multi-part design of the fixed block, it is possible to design accordingly only its central part, which is used to guide and accommodate the movable bending blocks. It is expedient here if the fixed block--as the central part--has a central sliding bracket which has the necessary properties for holding and guiding the bending blocks. For example, this sliding console can be designed as an individual part, in particular in the form of a forged part, or can be made from forged rod material. In contrast, the edge areas of the fixed block, which can be designed separately from the shifting console as holding strips, can be made as separate simple parts, in particular from inexpensive sheet metal, because these holding strips - as their name suggests - only take on a holding function for the bending blocks. The multi-part fixed block thus comprises three functional areas, which are formed in detail from the sliding console and the two outer (upper + lower) holding strips.

Due to the multi-part nature of the fixed block explained above, its raw part costs are reduced on the one hand, since standard dimensions or standard material can be used in the form of semi-finished products, and on the other hand the assembly costs for the axial displacement device are reduced because the assembly thanks of the smaller components is facilitated. Furthermore, smaller stator window clearances are achieved for the rolling device, since there is no need to add up the fixed block tolerances.

According to a development of the invention, the rolling device comprises a stand, at least two rolls that are attached to the stand by means of chocks and can be displaced relative to one another in the axial direction, and at least one axial displacement device that is assigned to a chock of at least one of the rolls and on this chock can act, the axial displacement device having a fixed block, at least one displaceable bending block and at least one displacement cylinder assigned to the bending block, with which the bending block can be displaced relative to the fixed block. Outside of a bending block, the shifting cylinder associated therewith is flanged to an end plate connected to the fixed block, with a piston rod of the shifting cylinder interacting with the bending block.

In the last-mentioned development of the invention, the main advantage is that the displacement cylinders used here can be standard cylinders that can be procured inexpensively as a purchased part. As a result, these displacement cylinders can be kept available as a spare part, which leads to improved maintenance and repair friendliness for the invention. A further advantage of this external arrangement of the shifting cylinders, i.e. outside of the bending blocks, is that an axial length of the bending blocks can be selected to be smaller in the direction of their shifting direction, because this length is almost independent of the shifting stroke. This advantageously achieves a more compact design for the bending blocks.

The above-described external arrangement of the shifting cylinders on the end plate of the fixed block is to be understood in the sense of the present invention in such a way that a modular structure is achieved on the one hand for the bending blocks and on the other hand for the shifting cylinders, so that these elements form independent units. In this way it is possible to vary the displacement stroke by changing the displacement cylinder without having to modify the bending blocks. This facilitates assembly and disassembly of the structural units mentioned above.

In an advantageous development of the invention, it can be provided that a displacement cylinder, preferably the displacement cylinders, is/are (each) equipped with fixed tubing for the purpose of supplying operating resources, for example hydraulic oil. This achieves a permanent connection of the displacement cylinders to a supply unit for the operating resources, with disadvantageous hose connections, which may have to be separated from the displacement cylinders, being eliminated.

In an advantageous further development of the invention, outside of a bending block, the shifting cylinder assigned thereto can be flanged to an end plate connected to the fixed block, with a piston rod of the shifting cylinder interacting with the bending block. The advantages of such an arrangement of the displacement cylinder have already been explained above in connection with the corresponding alternative embodiment of the invention, so that reference may be made to this in order to avoid repetition.

• Bessere Zugänglichkeit und kompaktere Bauweise, dank der erläuterten Mehrteiligkeit des Festblocks;
• Bedingt durch die Aufteilung des Festblocks in drei funktionale Bereiche (nämlich (i) Verschiebekonsole, und (ii) und (iii) obere + untere Halteleisten) können den Belastungen entsprechend gezielt geeignete Werkstoffe und Fertigungsverfahren ausgewählt werden;
• Verbesserte Wartung und Montage, dank einer Gewichtsreduktion der einzelnen Bauteile.

Further advantages of the invention are based on the following aspects:

• Better accessibility and more compact design, thanks to the explained multi-part fixed block;
• Due to the division of the fixed block into three functional areas (namely (i) sliding console, and (ii) and (iii) upper + lower retaining strips), suitable materials and manufacturing processes can be selected according to the loads;
• Improved maintenance and assembly thanks to a reduction in the weight of the individual components.

Exemplary embodiments of the invention are described in detail below using a schematically simplified drawing.

Fig. 1

eine Perspektivansicht auf zwei seitliche Holme einer erfindungsgemäßen Walzvorrichtung,

Fig. 2

eine Perspektivansicht eines Festblocks, als Teil einer Axialverschiebeeinrichtung, die bei der Walzvorrichtung von Fig. 1 eingesetzt wird,

Fig. 3

eine Perspektivansicht einer Axialverschiebeeinrichtung, die bei der Walzvorrichtung von Fig. 1 eingesetzt wird, und

Fig. 4-5

verschiedene Ansichten einer herkömmlichen Axialverschiebeeinrichtung und von Teilen davon.

Show it:

1

a perspective view of two lateral beams of a rolling device according to the invention,

2

a perspective view of a solid block, as part of an axial displacement device used in the rolling device of 1 is used,

3

a perspective view of an axial shifter used in the rolling apparatus of 1 is used, and

Figures 4-5

various views of a conventional axial displacement device and parts thereof.

Below is with reference to the Figures 1 to 3 a preferred embodiment of a rolling device 100 according to the invention is shown and explained, in which by means of an axial displacement device 108 (cf. 3 ) a (not shown) roll gap in the rolling operation of the rolling device 100 can be variably adjusted. The same features in the drawing are each provided with the same reference symbols. At this point it is pointed out separately that the drawing is merely simplified and in particular is not shown to scale.

1 1 shows an example of the rolling device 100, which is designed as a so-called four-high plant, in which two work rolls 104, 105 and adjacent thereto two back-up rolls (not shown) are provided on a stand 102. As an alternative to this, a different number of rolls is also possible, for example in the form of a six-high system, in which additional intermediate rolls are provided between the working rolls and the back-up rolls. In any case, a roll gap for the material or metal strip to be rolled is formed between the work rolls 104, 105. The profile of this nip is adjusted by adjusting the work rolls 104, 105. Here, the profile of the nip can be suitably adjusted with the aid of the axial displacement device 108 .

According to the representation in 1 are in the stand 102 of the rolling device 100, the two work rolls 104, 105 held, also the spars 9 one Stand of this framework 102 are shown. At least one of the work rolls 104, 105 can be shifted in the direction of its axial extent by the axial shifting device 108. Further details of this axial displacement device 108 are explained in detail below.

The axial displacement device 108 - as seen in the perspective view of FIG 2 can be seen - includes a fixed block 110, which is designed in several parts, namely in the form of a central sliding bracket 116 and, separately from it, two separate holding strips in the form of an upper holding strip 117 and a lower holding strip 118. The holding strips 117, 118 are on the roll stands of the stand 103 of the Rolling device 100 (cf. 1 ) assembled.

The axial displacement device 108 comprises displaceable bending blocks, namely an upper bending block 112 and a lower bending block 113, these bending blocks 112, 113 being guided in a displaceable manner along the displacement console 116. Specifically, the upper flexure block 112 is positioned between the traversing bracket 116 and the upper support slat 117 , while the lower flexure block 113 is positioned between the traversing bracket 116 and the lower support slat 118 . This is in the perspective view of 3 shown.

Shifting cylinders 114 are provided for shifting the bending blocks 112, 113 along the shifting console 116, which are arranged outside of the bending blocks 112, 113 and are flanged to an end plate 120 connected to the fixed block 110. The piston rods of the displacement cylinders 114 pass through the end plate 120 and are attached to the bending blocks 112,113. Actuation of the displacement cylinders 114 causes the bending blocks 112, 113 to be displaced as intended along the displacement console 116 or relative thereto.

At this point it should be pointed out separately that the feature according to which a piston rod 115 (cf. 3 ) of a displacement cylinder 114 in interaction with an (associated) bending block 112, 113 is to be understood in the way that the piston rod 115 - as just explained - with a front side thereof is firmly connected to the bending block 112,113. As a result, the bending block 112, 113 is displaced synchronously with a translational movement of the piston rod 115 along the displacement bracket 116, namely in both directions.

The bending blocks 112, 113 of the axial shifting device 108 can be assigned to work roll chocks (not shown) and act on these chocks when the shifting cylinders 114 are actuated. Thus, displacement of the bending blocks 112, 113 results in a corresponding axial displacement of the work rolls 104, 105, thereby achieving a desired roll gap profile.

A bending cylinder 122 is accommodated in each of the bending blocks 112, 113 (cf. 3 ), with which a targeted bending of an associated work roll is achieved. In the representation of 3 only the head of such a bending cylinder 122 can be seen.

The shifting cylinders 114 can be supplied with operating resources, in particular with hydraulic oil, by means of piping (not shown), which is preferably firmly or permanently connected to the shifting cylinders 114 .

The bending blocks 112, 113 on the one hand and the displacement cylinders 114 on the other hand are of modular design and are therefore designed as independent structural units. This enables simple and inexpensive assembly of the axial displacement device 108 and, if necessary, also a possible replacement of these structural units in the event of necessary repairs or maintenance of the rolling device 100 according to the invention.

Reference List

100

rolling device

102

framework

103

spars (of a stand of scaffolding 102)

104-105

rolls

108

axial displacement device

110

fixed block

112

upper bending block

113

lower bending block

114

displacement cylinder

115

piston rod (of a displacement cylinder 114)

116

central sliding console

117

upper retaining bar

118

lower retaining bar

120

face plate (of fixed block 110)

122

bending cylinder

Claims (10)

1. Rolling device (100) comprising:

   a stand (102),

   at least two rolls (104-105), which are mounted on the stand (102) by means of chocks and are displaceable relative to one another in axial direction, and

   at least one axial displacing device (108), which is associated with a chock of at least one of the rolls (104-105) and can act on this chock,

   wherein the axial displacing device (108) comprises a fixed block (110) of multi-part construction, at least one displaceable bending block (112, 113) and at least one displacing cylinder (114), which is associated with the bending block (112, 113) and by which the bending block is displaceable relative to the fixed block (110),

   characterised in that the fixed block (110) comprises a central displacing bracket (116) and separately therefrom two separate holding strips (117, 118), which are arranged adjacent to the displacing bracket (116) respectively above and below the bracket and are mounted on roll housings of the stand (102), wherein the central displacing bracket (116) is constructed as an individual part.
2. Rolling device (100) according to claim 1, characterised in that the central displacing bracket (116) is constructed in the form of a forged part.
3. Rolling device (100) according to claim 2, characterised in that the central displacing bracket (116) is produced from forged bar material.
4. Rolling device (100) according to any one of claims 1 to 3, characterised in that the holding strips (117, 118) are each produced as plain parts, particularly of sheet metal.
5. Rolling device (100) according to any one of claims 1 to 4, characterised in that the holding strips (117, 118) are mounted on rails (103) of a housing of the stand (102).
6. Rolling device (100) according to any one of claims 1 to 5, characterised in that the axial displacing device (108) comprises an upper bending block (112) and a lower bending block (113), wherein these two bending blocks (112, 113) are each arranged between the displacing bracket (116) and the upper or lower holding strip (117, 118).
7. Rolling device (100) according to claim 6, characterised in that a respective separate displacing cylinder (110 is associated with each of the upper bending block (112) and the lower bending block (113).
8. Rolling device (100) according to any one of the preceding claims, characterised in that the displacing cylinder (114) associated with a bending block (112, 113) is flange-mounted externally thereof on an end plate (120) connected with the fixed block (11), wherein a piston rod (115) of the displacing cylinder (114) interacts with the bending block (112, 113).
9. Rolling device (100) according to claim 8, characterised in that the displacing cylinder (114) is equipped with fixed piping for the purpose of feed of operating medium, particularly in the form of hydraulic oil.
10. Rolling device (100) according to any one of the preceding claims, characterised in that a bending block (112, 113) and the displacing cylinder (114) associated therewith are of modular construction and are respectively constructed as independent components.

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