EP2389258B2 - Bending and balancing device for axially shiftable work rolls of a rolling mill - Google Patents

Description

The invention relates to a bending and Ausbalanciervorrichtung for axially movable work rolls of a rolling stand, in particular a four-high stand, with guide blocks in the height range of the work roll chocks are provided on both sides in the window of each roll stand and transmit the force of bending and Balancierzylindern on the axially and vertically displaceably guided work roll chocks ,

Such rolling mills can be present in hot and cold rolling mills, Steckel mills and plate rolling mills.

Bending and Ausbalanciervorrichtungen the above type are for example from the EP 0 256 408 A2 known.

The previous stroke of the bending / Balancierzylinder is limited to ensure adequate guidance of the work roll chocks at large Arbeitswalzenaufgängen.

The object of the invention is to provide a bending and balancing device which
ensures a much larger work roll entrance while constant, maximum guidance of the work roll chocks.

This object is achieved according to the invention by a bending and balancing device according to claim 1.

The flying negative and / or positive bending device including balancing function for stationary and axially displaceable work rolls, is thus particularly suitable for high rises.

The core idea of the solution according to the invention is that the previous one-piece stationary guide block is divided into an upper movable guide block and a lower fixed or movable guide block.

Arranged in or connected to the upper or lower guide block is a bending and Balancierzylinder which acts simultaneously on the upper and lower work roll and is guided in the respective other guide block.

On both guide blocks, the axial displacement shifters including the work roll latches are mounted.

The upper movable guide block or both movable guide blocks are guided in the roll stand.

In addition, a negative bending of the work rolls can be realized in that the pressure cover the work roll construction tail pipes or the guide blocks clasp the work roll mounting lugs form fit.

The invention combines the high reliability of the present bending and balancing device design with greater flexibility with respect to increasing the nip.

Another advantage is that according to the invention with a minimum number of bending and Balancierzylinder manages for positive and negative bending, by the simultaneous action on the lower and upper work roll.

The invention allows a larger adjustment range of the work roll bending (positive and negative), the z for special process requirements. B. the Steckel process - large rolling force fluctuations within a band / stitch - required or desirable.

The invention will be explained in more detail with reference to the drawings.

Fig. 1

einen Vertikalschnitt durch die Biege- und Ausbalanciervorrichtung

Fig. 2

einen Querschnitt gemäß der Linie B-B in Figur 1

Fig. 3

einen Vertikalschnitt ähnlich Figur 1 in einer abgewandelten Ausführung

Fig. 4

eine weitere Ausbildung

Showing:

Fig. 1

a vertical section through the bending and balancing device

Fig. 2

a cross section along the line BB in FIG. 1

Fig. 3

similar to a vertical section FIG. 1 in a modified version

Fig. 4

another education

In the window of the roll stand 1, the work roll chocks 3 and 3 'for the upper and lower work rolls 10 and 10' are indicated.
The guide block divided according to the invention is fastened to the window, the upper guide block 2 being movable and the lower guide block 2 'likewise being movable or stationary.
The work roll chocks 3 and 3 'are displaceable by the displacement device 6 and 6' in the axial direction of the work rolls.
Vertically, the change in position takes place through the bending and balancing cylinder 5.

This is about Druckdeckei 4 or 4 'with the work roll chocks - or better said, with the ears - in engagement, and it is also essential for the invention that only by a bending and Balancierzylinder 5 the connection to the upper work roll chock 3 and the lower work roll chock 3 'is simultaneously produced.

In the execution after FIG. 3 is - in adaptation to performance FIG. 1 - Only exchanged the piston assembly.

A negative or positive employment of the work roll chocks is achieved with the embodiment described in the FIG. 4 is shown.

Here, the guide block 2 clasps the approach of the work roll chock 3 or Druckdeckelerweiterungen 7 clasp the ears of the work roll chocks 3 and 3 ', so that the movement of the bending and Balancierzylinders is directly transferable in both directions.

Claims (1)

1. Bending and balancing device for axially displaceable working rolls (10, 10') of a roll stand, particularly a four-high roll stand, wherein guide blocks (2) are provided in the height region of the working roll chocks (3, 3') on either side in the window of each roll housing (1) and the force of bending and balancing cylinders (5) is transmissible to the working roll chocks, which are guided to be displaceable in axial direction and vertically, characterised in that

   - the guide blocks are each divided into an upper guide block (2) and a lower guide block (2'),

   - the upper guide blocks (2) are mounted in the window of the roll housing (1) to be vertically displaceable,

   - the lower guide blocks (2') are mounted in the window of the roll housing (1) to be stationary or similarly vertically displaceable,

   - arranged in each of the interrelated upper and lower guide blocks (2, 2') is a bending and balancing cylinder (5) which is guided by these and is disposed in engagement with the upper and lower working roll chocks (3, 3'),

   - displacing devices (6) for axial displacement of the working roll chocks (3, 3') inclusive of the working roll locking means (9) are arranged at the upper and lower guide block, and

   - the force transmission from the bending and balancing cylinders (5) to the working roll chocks takes place by way of pressure covers (4, 4', 7) bearing against these or by way of the guide blocks, wherein

   - the pressure covers (4, 4') or the pressure cover expansion means (7) mechanically positively clamp around ears of the working roll chocks or the guide blocks (2, 2') clamp around projections of the working roll chocks (3, 3').

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