DE102021206917A1 - mill stand - Google Patents

Abstract

The invention relates to a roll stand (1) for rolling metal flat products, comprising at least two driven rolls which form a roll gap for the rolling stock between them, and at least one spindle head holder (3) for the temporary non-rotatable accommodation of drive-side heads of spindles of the rolls, the Spindle head holder (3) has at least a first and a second chuck (8,9), which each accommodate a first and second spindle head (4,5) and can be actuated in terms of an opening and closing movement, the first and/or second chuck (8,9) are designed to be adjustable in their position relative to one another and the adjustability of the first and/or second chuck (8,9) being independent of the opening and closing movement.

Description

The invention relates to a roll stand for rolling metal flat products, comprising at least two driven rolls which form a roll gap for the rolling stock between them, and at least one spindle head holder for temporarily non-rotatably receiving drive-side heads of spindles of the rolls.

For the rolling of metal flat products, roll stands are usually used, with which a thickness reduction or strip thickness reduction of hot strips or cold strips is achieved. Various roll stands are used, which differ in terms of dimensioning, the number of rolls and the roll arrangement as well as in terms of the equipment with technical adjustment systems and in terms of roll cooling and roll lubrication. A roll stand normally comprises a pair of work rolls with associated work roll chocks, blocks for guiding the work roll chocks with work roll bending and shifting, a pair of back-up rolls with associated back-up roll chocks, a screwdown and adjustment system for setting/adjusting the roll gap, i. H. the gap between the upper and lower work roll, force measuring devices for measuring the rolling force, roll stands, drive systems, work roll cooling and lubrication as well as equipment for guiding the rolling stock.

The rotary movement of the work rolls is caused by suitable motors with the help of drive shafts, which are also referred to as "spindles". These spindles are designed at their drive-side ends in such a way that they can be brought into engagement with a motor shaft of the drive. The spindles often have the task of allowing misalignment between the motor shaft of the roller drive and the rollers themselves.

Work rolls of a roll stand have to be removed from the roll stand from time to time, for example if the work rolls have to be replaced due to wear or if the configuration of the roll stand is to be changed. In rolling stands of conventional design, a spindle head holder is usually provided at the level of the driven rolls, which is used to temporarily fix the drive-side end of the spindle in question or the spindle head in order to be able to remove the working roll in question from the rolling stand.

From the CN 102441574B discloses a spindle mount for a 4-6-high roll stand in which an upper and a lower half of the spindle head mount can be actuated, ie opened and closed, together. This publication also discloses an adjustment mechanism with which the distance between the upper and lower parts of the spindle head mount can be adjusted in relation to one another, this adjustment movement being synchronous and positively coupled to the opening and closing movement of the spindle head mount.

The invention is therefore based on the object of providing a roll stand of the type mentioned at the outset in which it is possible to easily install and remove individual rolls and on the other hand the roll stand enables the roll configuration to be changed easily.

The object on which the invention is based is achieved by a roll stand with the features of claim 1. Advantageous refinements of the invention result from the dependent claims.

According to one aspect of the present invention, a roll stand for rolling metal flat products is provided, which comprises at least two driven rolls which form a roll gap for the rolling stock between them, and at least one spindle head holder for the temporary, non-rotatable accommodation of drive-side heads of spindles of the rolls, wherein the spindle head holder has at least one first and second chuck, each of which accommodates a first and a second spindle head, the position of the first and/or second chuck being adjustable relative to one another and the adjustability of the first and/or second chuck being independent of the opening and closing movement. This allows a different changing position to be set for either one or the other roller. This can be desirable, for example, with a so-called twin-drive transmission, with which different rolling moments can be set for different driven rolls. The configuration according to the invention allows a smaller work roll to be installed in the roll stand instead of a larger work roll, optionally with an additional roll. Furthermore, it is easy to convert the roll stand to a larger roll gap.

Preferably, the first and/or second chuck are adjustably arranged on a holder or a holding device.

Furthermore, the first and/or second chuck are preferably designed to be vertically adjustable relative to one another in the installed position.

The vertical adjustment movement of the chuck can be positively guided, for example, so that a torsion-proof linear guidance of the first and second chuck is ensured in the respectively provided positions.

Such guidance of the chucks can be designed to be self-lubricating, for example with guide elements that consist entirely or partially of bearing bronze or similar materials.

In an advantageous variant of the roll stand, it is provided that the clamping chucks are formed by preferably hydraulically actuated, movably guided clamping heads.

In this variant of the invention, it is expediently provided that the spindle head holder has at least four clamping heads, which are arranged in pairs relative to one another, with two clamping heads each forming a chuck.

In this particularly advantageous embodiment of the roll stand according to the invention, it is provided that the first and second chucks can be actuated independently of one another. In particular, this ensures that the driven rollers can optionally be removed individually.

The spindle head holder expediently comprises holders which are rigidly connected to a roll stand of the roll stand and on which the clamping heads are movably guided.

In an alternative embodiment of the invention, the chucks comprise a first and second holding jaw, the holding jaws being designed to complement one another and being adjustable relative to one another and apart in the sense of an opening and closing movement.

In a preferred variant of the roll stand according to the invention, the holding jaws are designed in multiple parts and comprise first and second holding jaw segments that can be adjusted relative to one another, with each holding jaw segment receiving or forming part of a chuck.

The holding jaws or holding jaw segments which are brought into engagement with the spindle head can have grooves and/or ridges which extend in the circumferential direction of the spindle head. In the clamping position, these engage in complementary beads and/or grooves of the spindle head. On the one hand, these grooves and/or beads fix the spindle head in an axially defined position when inserting or removing the rollers, on the other hand, they absorb part of the axial forces that occur in the process. Axial fixation is particularly important for spindles with integrated length compensation.

The invention is explained below with reference to the accompanying drawings using two exemplary embodiments.

• 1 eine perspektivische Teilansicht der Antriebsseite eines Walzgerüsts gemäß der Erfindung,
• 2 eine perspektivische Darstellung einer ersten Variante der Spindelkopfhalterung gemäß der Erfindung in einer ersten Position der Spannfutter,
• 3 eine perspektivische Darstellung der in 2 gezeigten Spindelkopfhalterung in einer zweiten Position der Spannfutter,
• 4 eine perspektivische Darstellung einer Spindelkopfhalterung nach einem zweiten Ausführungsbeispiel der Erfindung,
• 5 eine perspektivische Darstellung der in 4 dargestellten Spindelkopfhalterung, bei der sich die Spannfutter in einer zweiten Position zueinander befinden und
• 6 eine perspektivische Darstellung einer Rückansicht der in den 4 und 5 gezeigten Spindelkopfhalterung, wobei die Spannfutter entsprechend der Position in 5 eingestellt sind.

Show it:

• 1 a perspective partial view of the drive side of a roll stand according to the invention,
• 2 a perspective view of a first variant of the spindle head mount according to the invention in a first position of the chuck,
• 3 a perspective view of the 2 shown spindle head mount in a second position of the chucks,
• 4 a perspective view of a spindle head mount according to a second embodiment of the invention,
• 5 a perspective view of the 4 shown spindle head mount in which the chucks are in a second position relative to each other and
• 6 a perspective view of a rear view in the 4 and 5 shown spindle head mount, with the chucks corresponding to the position in 5 are set.

This in 1 The roll stand 1 shown can, for example, be designed as a roll stand 1 in a so-called 4-high configuration and comprises two driven work rolls and two back-up rolls, which are mounted in a roll stand 2 . On the drive side of the roll stand 1, the 1 is shown, a spindle head holder 3 is provided with which a first and a second spindle head 4, 5 of a first and second spindle of the work rolls can be fixed. The configuration of the roll stand 1 is not critical to the invention.

The spindle head mount 3 includes first and second holders 6, 7 rigidly connected to the roll stand 2. As shown in FIG.

2 shows a first variant of the spindle head mount 3 according to the invention in the open position. The same components are provided with the same reference symbols in all figures.

The spindle head mount 3 according to the invention comprises a first upper chuck 8 and a second lower chuck 9, which are each designed for the purpose of clamping or receiving the first and second spindle heads 4, 5 in a rotationally fixed manner. The chucks 8 and 9 are formed by a left holding jaw 10 and a right holding jaw 11, which are mounted with guide columns 12 in receptacles 13 of the holders 6, 7. The holding jaws 10, 11 can be moved towards one another and apart in the sense of an opening and closing movement via hydraulic cylinders 14, which are supported against the holders 6, 7 as abutments.

The holding jaws 10, 11 each comprise an upper holding jaw segment 15 and a lower holding jaw segment 16, with the lower holding jaw segment 16 being designed to be linearly adjustable relative to the upper holding jaw segment 15, so that the lower holding jaw segments 16 can be lowered with respect to the upper holding jaw segments 15, as is shown in 3 is shown.

3 shows the closed position of the chucks 8, 9, in which the holding jaw segments 15, 16 are closed so that they clamp the spindle heads 4, 5. Each holding jaw segment 15, 16 has an approximately C-shaped contour which encompasses approximately 90° of the spindle head circumference. A bearing block 17 is fastened to the far end of each holding jaw segment. Four bearing blocks 17 each form a chuck 8, 9.

The bearing blocks 17 of the holding jaw segments have bulges 24 which, in the clamped position, achieve an axial fixation of the spindle head with grooves 25 of the spindle head.

The adjustability of the lower holding jaw segments 16 relative to the upper holding jaw segments 15 is accomplished by adjusting cylinders 18 . The lower holding jaw segments 16 are guided on the upper holding jaw segments 15 in a vertically displaceable manner. Corresponding guide rails 19 are provided on the lower holding jaw segments 16 for this purpose.

Alternatively, the upper holding jaw segments 15 can be designed to be adjustable relative to the lower holding jaw segments 16 .

A second embodiment of the roll stand 1 according to the invention and the spindle head mount 3 is in the 4 until 6 shown. As already mentioned above, the same components are provided with the same reference numbers there.

In the second embodiment according to the invention, the spindle head mount 3 comprises a first and second holder 6, 7, which are also each rigidly attached to the roll stand 2 of the roll stand 1. At each holder 6, 7 an upper and a lower clamping head 20, 21 is attached. The upper clamping heads 20 and the lower clamping heads 21 each form a chuck 8, 9, the upper clamping heads 20 being adjustable independently of the lower clamping heads 21 in terms of an opening and closing movement, each with hydraulic cylinders 14. Each clamping head 20, 21 is provided with a clamping shell 22 at its end leading in the closing direction, the clamping shells 22 of a chuck 8, 9 each clamping a spindle head 4, 5.

In the second embodiment according to the 4 until 6 the spindle heads 4, 5 are not shown for reasons of simplification. The lower clamping heads 21 are designed to be vertically adjustable relative to the upper clamping heads 20 . In the exemplary embodiment described, the upper clamping heads 20 are fixed in place on the holders 6, 7, whereas the lower clamping heads 21 are designed to be adjustable relative to the upper clamping heads 20, as are the lower holding jaw segments 16 according to the first exemplary embodiment of the invention relative to the upper holding jaw segments 15 are adjustable.

In the embodiment according to the 4 until 6 it can be provided that the upper clamping heads 20 can be designed to be adjustable relative to the lower clamping heads 21 . Finally, both the upper clamping heads 20 and the lower clamping heads 21 can be mounted vertically adjustable on the first and second holder 6.7. The clamping heads 20, 21 are guided in slots 23 of the holders 6, 7 with a guide bar 18 so that they cannot rotate vertically, as can be seen from the rear view in FIG 6 is recognizable. The guide rails 19 can be made of a self-lubricating material. Alternatively or additionally, the elongated holes 23 can have sliding linings made from a self-lubricating material.

The clamping heads 20, 21 of the holding jaw segments have bulges 24, which in the clamped position with grooves 25 of the spindle head realize an axial fixation of the spindle head.

5 shows the spindle head mount 3 in a state in which the lower clamping heads 21 are in a lowered position, whereas in FIG 6 the lower clamping heads 20 are shown in a raised position.

Reference List

1

mill stand

2

roller stand

3

spindle head mount

4

first, upper spindle head

5

second, lower spindle head

6

first holder

7

second holder

8th

first, upper chuck

9

second, lower chuck

10

left holding jaw

11

right retaining jaw

12

guide pillars

13

Recordings of the holders

14

hydraulic cylinder

15

upper jaw segments

16

lower jaw segments

17

bearing blocks

18

adjustment cylinder

19

guide rails

20

upper clamping heads

21

lower clamping heads

22

clamp shells

23

slots

24

bulges

25

grooves

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was 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.

Patent Literature Cited

• CN 102441574B [0005]

Claims (12)

Rolling stand (1) for rolling flat metal products, comprising at least two driven rolls which form a roll gap for the rolling stock between them, and at least one spindle head mount (3) for temporarily receiving non-rotatable heads of drive-side spindles of the rolls, the spindle head mount (3) has at least one first and one second chuck (8,9), which each accommodate a first and second spindle head (4,5) and can be actuated in the sense of an opening and closing movement, the first and/or second chuck (8,9 ) are designed to be adjustable in their position relative to one another and the adjustability of the first and/or second chuck (8, 9) being independent of the opening and closing movement. Rolling mill (1) after claim 1 , characterized in that the first and/or second chuck (8, 9) are designed to be vertically adjustable relative to one another in the installed position. Rolling mill (1) according to one of Claims 1 or 2 , characterized in that the first and/or second chuck (8, 9) can be adjusted in two discrete positions relative to one another. Rolling mill (1) according to one of Claims 1 until 3 , characterized in that the adjusting movement of the chucks (8, 9) is positively guided. Rolling mill (1) according to one of Claims 1 until 4 , characterized in that the guide of the chucks (8, 9) is designed to be self-lubricating. Rolling mill (1) according to one of Claims 1 until 5 , characterized in that the chucks (8, 9) are formed by preferably hydraulically operated, movably guided clamping heads (20, 21). Rolling mill (1) according to one of Claims 1 until 6 , characterized in that the spindle head holder has at least four clamping heads (20,21) which are arranged in pairs relative to one another, with two clamping heads (20,21) each forming a chuck (8,9). Rolling mill (1) according to one of Claims 1 until 7 , characterized in that the first and second chucks (8, 9) can be actuated independently of one another. Rolling mill (1) according to one of Claims 1 until 8th , characterized in that the spindle head holder (3) comprises holders (6, 7) which are rigidly connected to a roll stand (2) of the roll stand and on which the clamping heads (20, 21) are movably guided. Rolling mill (1) according to one of Claims 1 until 5 , characterized in that the chucks (8, 9) have first and second holding jaws (10, 11), the holding jaws (10, 11) being designed to complement one another and being adjustable relative to one another and apart in the sense of an opening and closing movement. Rolling mill (1) after claim 9 , characterized in that the holding jaws (10,11) are constructed in several parts and comprise first and second holding jaw segments (15,16) which can be relatively, preferably vertically, adjusted and which each form a chuck (8,9). Rolling mill (1) according to one of Claims 1 until 11 , characterized in that the holding jaws (10, 11) have grooves and/or beads (24) which extend in the circumferential direction of a spindle head (4, 5) to be clamped.

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