AT509455B1 - ROLLING RACK WITH ROLLER BEARING - Google Patents

Description

Austrian Patent Office AT509 455 B1 2011-09-15

description

ROLLING RACK WITH ROLLER BEARING

The subject of this invention is a rolling device with work rolls and optionally with intermediate rolls, which are mounted by means of roll chocks via radial bearings in a rolling mill. The subject of this invention also provides a method for conversion, in particular for retrofitting, a rolling stand with work rolls and / or intermediate rolls without Axialverschiebungseinrichtung on a roll stand with Axialverschiebungseinrichtung.

In rolling mills for cold-rolled strip, it is state of the art that the work rolls and the intermediate rolls in the axial direction (transverse to the strip running direction) can be moved opposite to each other. This is used in combination with an axially variable diameter (cut) of the rolls as an additional actuator for influencing the flatness of the strip.

Roller shifters are generally used to extend the flatness adjustment range using individual roll grinding. This brings logistical, business and qualitative benefits.

In conventional rolling stands with axial displacement, the displacement device is fixedly integrated in the roll stand. The work rolls have a one-piece construction and are mounted on roll chocks in the rolling stand. The roll chocks are also constructed in one piece and at the same time include the radial bearings and the thrust bearings for the work rolls.

Roll stands with axial displacement devices for the work rolls and optionally for the intermediate rolls have a more complex structure than rolling stands without axial displacement and are therefore more expensive.

Many customers buy for cost reasons rolling mills without axial displacement, but often at a later date a conversion to a rolling mill with axially movable work rolls and / or intermediate rolls is desired. This conversion is very costly in conventional systems, since for the work rolls, possibly also the intermediate rolls and the entire roll storage must be replaced. Sometimes even the whole framework has to be exchanged.

The invention is therefore an object of the invention to disclose a rolling device that can be retrofitted with a axial displacement for the work rolls without much time and cost.

This object is achieved by a rolling device, in which for a axial displacement of at least one work roll or an intermediate roll, a roll stub is attachable to this work roll or intermediate roll. Preferably, this roller stub is screwed, but it can also be attached via an adhesive connection or via a press fit. In addition, the roller stub is mounted on a thrust bearing in a further roll chock, wherein the other roll chock is screwed to the roll chock of the axially displaceable rollers.

The rolling device according to the invention can thus be easily retrofitted with an axial displacement device. Through the work rolls or intermediate rolls with screw-on roll stubs and through the two-piece roll chocks a subsequent conversion designed particularly simple, since only a few components must be replaced.

If the rolling device operated without Axialverschiebeeinrichtung, the rollers are secured with the roller stubs attached thereto via an axial lock in position. In this case, the bearing cap is bolted via an intermediate piece with the associated roller chock, in which only the radial bearing is arranged.

For a conversion to a roll stand with axial displacement, the bearing cap, the spacers and the corresponding roller stub are unscrewed. At the existing rollers are then screwed correspondingly longer roller stub for receiving the axial bearing. These roller stubs are mounted via thrust bearings in a further roll chock, wherein the other roll chock is bolted to the existing roll chock for the radial bearing. By an axial displacement of the roll chocks, for example by means of a hydraulic cylinder, then the corresponding work roll can then move axially.

The whole storage system for the axial bearing is thus easily screwed for a conversion to the existing rolling device. Retrofitting is possible with a minimum of time and expense.

Preferably, a roller stub is screwed to both work rolls. As a result, both work rolls can be easily retrofitted with a Axialverschiebeeinrich-device.

The subject of this invention also provides a method for converting a rolling mill with work rolls and optionally intermediate rolls without axial displacement on a roll stand with Axialverschiebeeinrichtung. The method is characterized in that attached to at least one work roll or an intermediate roll a stub roll - preferably screwed - and that is screwed to a roll chock of this roll another roll chock. The roller stub is mounted on a thrust bearing in another roll chock, so that in an axial displacement of the roll chock and the corresponding roller is moved in the axial direction.

It is advantageous if both work rolls are rebuilt for axial displacement.

The axial displacement of the roller or rollers is normally carried out via a hydraulic cylinder. However, it is also conceivable that the axial displacement is performed via an electromechanical linear drive. This can save the complex hydraulic system and increase energy efficiency.

The method offer the advantage that the existing roll chocks for the radial bearings, the existing bearing cap and the existing work rolls can continue to be used without editing. In the following an embodiment of the invention will be described with reference to drawings.

In the drawings: Fig. 1 is a schematic perspective view of a rolling device after

State of the art; Fig. 2 is a schematic perspective view of the invention Walzvorrich device (the axial lock or the axial displacement device is not shown); Fig. 3 is a schematic perspective view of the invention Walzvorrich device without Axialverschiebeeinrichtung; 4 shows a schematic perspective view of the rolling device according to the invention with an axial displacement device; In Figure 1, a conventional rolling device 1 is shown according to the prior art with an axial displacement device. The work rolls 2 are made in one piece. They are mounted on radial bearings 3 and thrust bearing 8, which are arranged on the roller stub 9, in a one-piece work roll chock 4. At the roll chocks 4, the bearing cap 20 are screwed. The axial forces are transmitted via the thrust bearing 8 on the work rolls 2. For the conversion of conventional rolling devices without axial displacement on a rolling device with axial displacement of FIG. 1 so far at least the entire work rolls and the entire roll chocks had to be replaced.

Fig. 2 shows the rolling device T according to the invention, in which case neither a Axialverriegelung nor an axial displacement device are shown for better illustration.

The work rolls 2 'are mounted with radial bearings 3 each in a roll chock 5 for the radial bearing. The roll chocks 5 can be moved via the axial guide 14 relative to the bending block 11 in the axial direction. About the bending blocks 11, the deflection of the work rolls 2 'can be influenced. At the roll ends 12 threaded holes 13 are arranged so that there is a roll stub (not shown) can be screwed.

In Fig. 3, the rolling apparatus f is shown in Fig. 2 with bearing cap 16 for the work rolls 2 '. The work rolls 2 'are fixed in their axial position by bolts (not shown). The bearing caps 16 are bolted via the screw 17 'with the intermediate piece 7, which in turn on the screw 17 " is bolted to the respective roll chock 5.

To the roll flanges 12 17 screwed stub 10 are screwed on the screw 17. Such a rolling device 1 'without an axial displacement can be subsequently easily converted to a rolling device T with axial displacement.

4, the rolling device T according to the invention from Fig. 2 with an axial displacement device 18 for the work rolls 2 'is shown.

At the work rolls 2 'is screwed on the roll flange 12 via the screw 17 each have a roll stub 10'. Compared to the roller stub 10 of FIG. 3, this roller stub 10 'is slightly longer because the thrust bearing 8 acts on it. To the roller chocks 5 for the radial bearing is in each case via the screw 17 " screwed another roll chock 6. The work rolls 2 'are now mounted on the one hand in the roll chock 5 via the radial bearings 3 and on the other hand in the further roll chock 6 via the roll stub 10' and the thrust bearing 8.

At the further roll chock 6, the displacement device 18 is attached to the cylinders 19 via the screw 17 '.

The rolling device 1 'just described now offers the advantage that it can be offered and delivered on the one hand as a cost-effective version without axial roller displacement. Such a version has only bearing cap 16 and spacers 7, as shown in Fig. 3, on.

Now, if a customer wishes a subsequent conversion to a rolling device with an axial displacement, this can be done in a fairly simple manner. In essence, the short roll stub 10 (stub without thrust bearing) are unscrewed from the work rolls 2 ', as are the bearing caps 16 and the intermediate pieces 7. A rolling device 1' as shown in FIG. 2 is then obtained.

If both work rolls 2 'are to be equipped with an axial displacement device, then longer work roll ends 10' are screwed to both work rolls. To the roll chocks 5 are over the screw 17 " the other roll chocks 6 screwed to the thrust bearings 8. The bearing caps 16 are then fastened to these further roller chocks 6 via the screw connections 17 ', as shown in FIG. 4. The axial guides 14 (shown only in Fig. 2) in the bending blocks 11 provide for the guidance of the roll chocks 5 in the axial direction. The displacement device 18 consists of a fixed part, which is connected in the present example with the bending block 11 and a movable part, which via a bolt (not shown) with the bearing cap 16 is detachably connected. About the cylinder 19, the movable part of the displacement device 18 can be moved axially and thus also the roll chocks 5, 6 and thereby also the work rolls 2 '. 3.8

Claims (9)

Austrian Patent Office AT509 455 B1 2011-09-15 The modular construction of the work rolls 2 'and the roll chocks 5, 6 thus allows a delivery of the basic design of a rolling device with the possibility of later removal with lower additional costs. A retrofitting of intermediate rolls with an axial displacement device takes place in an analogous manner. The retrofitting with a Axialverschiebeeinrichtung is possible with little effort and without major design changes. This "modular system" It also reduces the variety of parts and promotes standardization. 1. rolling device (1 ') with work rolls (2') and optionally intermediate rolls, which are mounted by roller chocks (5) via radial bearings (3) in a roll stand, characterized in that for an axial displacement of at least one work roll (2 ') or Intermediate roll a roll stub (10 ') to the respective work roll (2') or intermediate roll is attachable and that the roll stub (10 ') via a thrust bearing (8) is mounted in a further roll chock (6), wherein the further roll chock (6) with the roll chock (5) of the axially displaceable rollers can be screwed. 2. Rolling device according to claim 1, characterized in that the roller stub (10 ') is attachable to the work roll (2') or to the intermediate roll via a releasable connection, is preferably screwed. 3. Rolling device according to claim 1 or 2, characterized in that on two work rolls (2 '), a roller stub (10') can be screwed. 4. A method for converting a rolling stand with work rolls (2 ') and optionally intermediate rolls without Axialverschiebeeinrichtung on a roll stand with axial displacement of the work rolls (2') or intermediate rolls, characterized in that at least one work roll (2 ') or to an intermediate roll a stub roll (10 ') is mounted and that a roll chock (5) of this work roll (2') or intermediate roll, another roll chock (6) is screwed, the roll stub (10 ') via a thrust bearing (8) in the roll chock (6) is, so that in an axial displacement of the roll chock (6) and the work roll (2 ') or the intermediate roll is displaced in the axial direction. 5. The method according to claim 4, characterized in that two work rolls (2 ') are rebuilt for axial displacement. 6. The method according to claim 4 or 5, characterized in that the axial displacement is performed via an electromechanical linear drive. 7. The method according to any one of claims 4 to 6, characterized in that during conversion, the existing roll chocks (5) for the radial bearings (3) are used without further processing. 8. The method according to any one of claims 4 to 7, characterized in that during conversion existing bearing caps (16) are used without further processing. 9. The method according to any one of claims 4 to 8, characterized in that during conversion, the existing work rolls (2 ') continue to be used without processing. 4 sheets of drawings 4/8