Rolling stand

Abstract

The invention relates to a rolling mill stand (1) for rolling flat metal products in at least two driven rolls, which form a roll gap between them for the rolled material, and at least one spindle head holder (3) for the temporary rotationally fixed mounting of drive-side heads of spindles of the rolls, wherein the spindle head holder (3) has at least one first and one second chuck (8, 9), each of which accommodates a first and second spindle head (4, 5) and is actuable in the sense of an opening and closing movement, wherein the first and / or second chuck (8, 9) are designed to be adjustable in their position relative to each other and wherein the adjustability of the first and / or second chuck (8, 9) is independent of the opening and closing movement.

Description

[0001] The invention relates to a rolling 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 the temporary, rotationally fixed reception of drive-side heads of spindles of the rolls according to the preamble of claim 1.

[0002] Rolling stands are typically used for rolling flat metal products to achieve a thickness reduction of hot or cold strip. Various rolling stands are used, which differ in terms of their dimensions, number of rolls, roll arrangement, as well as in terms of their equipment with technical adjustment systems and roll cooling and lubrication. A rolling 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 backup rolls with associated backup roll chocks, and an adjustment and setting system for setting / adjusting the roll gap, i.e.the gap between the upper and lower work rolls, force measuring devices for measuring the rolling force, roll stands, drive systems, work roll cooling and lubrication as well as devices for guiding the rolled material.

[0003] The rotary motion of the work rolls is generated by suitable motors with the aid of drive shafts, also known as "spindles." These spindles are designed at their drive-side ends so that they can be engaged with a drive motor shaft. The spindles often serve the purpose of facilitating the misalignment between the motor shaft of the roll drive and the rolls themselves.

[0004] Work rolls in a rolling stand must be removed from the stand from time to time, for example, when the work rolls need to be replaced due to wear or when the roll stand configuration needs to be changed. In conventional rolling stands, a spindle head support is usually provided at the level of the driven rolls. This support temporarily secures the drive end of the spindle or spindle head in order to allow the work roll in question to be removed from the stand.

[0005] CN 102441574 B discloses a spindle mount for a 4-6-high rolling stand, in which an upper and a lower half of the spindle head mount can be operated jointly, i.e., opened and closed. This document further discloses an adjustment mechanism with which the distance between the upper and lower parts of the spindle head mount can be adjusted, wherein this adjustment movement is synchronous and positively coupled with the opening and closing movement of the spindle head mount.

[0006] A rolling stand of this type is known from DE 66 07 838 U. Another rolling stand is known from JP S63 43716 A.

[0007] The invention is based on the object of providing a rolling stand of the type mentioned at the outset in which, on the one hand, it is possible to easily install and remove individual rolls and, on the other hand, in which the rolling stand enables a simple change of the roll configuration.

[0008] The object underlying the invention is achieved by a rolling stand having the features of claim 1. Advantageous embodiments of the invention emerge from the subclaims.

[0009] According to one aspect of the present invention, a rolling stand for rolling flat metal products is provided, comprising at least two driven rolls forming a roll gap for the rolled stock between them, and at least one spindle head holder for temporarily and non-rotatably receiving drive-side heads of spindles of the rolls, wherein the spindle head holder has at least a first and a second chuck, each receiving a first and a second spindle head, wherein the first and / or second chuck are designed to be adjustable in their position relative to one another, and wherein the adjustability of the first and / or second chuck is independent of the opening and closing movement. This allows a different change position to be set for either the one or the other roll.This can be desirable, for example, with a so-called twin-drive transmission, which allows different rolling torques to be set for different driven rolls. The configuration according to the invention allows a smaller work roll, optionally with an additional roll, to be installed in the rolling stand instead of a larger work roll. Furthermore, converting the rolling stand to a larger roll pitch is easily possible.

[0010] The first and / or second chuck is adjustably arranged on a holder or holding device.

[0011] The first and / or second chuck are designed to be vertically adjustable relative to each other in the installed position.

[0012] The vertical adjustment movement of the chucks can, for example, be positively guided so that a torsion-proof linear guide of the first and second chucks into the respective intended positions is guaranteed.

[0013] Such a chuck guide can be designed to be self-lubricating, for example with guide elements that are made entirely or partially of bearing bronze or similar materials.

[0014] In an advantageous variant of the rolling stand, the chucks are formed by preferably hydraulically actuated, movably guided clamping heads.

[0015] 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, with two clamping heads each forming a chuck.

[0016] In this particularly advantageous embodiment of the rolling stand according to the invention, the first and second chucks can be operated independently of one another. This ensures, in particular, that the driven rolls can be removed individually as required.

[0017] The spindle head holder comprises holders rigidly connected to a roll stand of the rolling mill, on which the clamping heads are movably guided.

[0018] In an alternative embodiment of the invention, the chucks comprise a first and a second holding jaw, wherein the holding jaws are designed to be complementary to one another and are adjustable relative to and apart from one another in the sense of an opening and closing movement.

[0019] The holding jaws are designed in several parts and comprise first and second holding jaw segments that are adjustable relative to one another, wherein each holding jaw segment receives or forms part of a chuck.

[0020] The holding jaws or holding jaw segments that engage with the spindle head can have grooves and / or ridges extending in the circumferential direction of the spindle head. When clamped, these engage complementary ridges and / or grooves in the spindle head. These grooves and / or ridges fix the spindle head in an axially defined position when inserting or removing the rolls, and they also absorb some of the resulting axial forces. Axial fixation is particularly important for spindles with integrated length compensation.

[0021] The invention is explained below with reference to the accompanying drawings using two embodiments.

[0022] They show: Figure 1 is a perspective partial view of the drive side of a rolling stand according to the invention, Figure 2 is a perspective view of a first variant of the spindle head holder according to the invention in a first position of the chuck, Figure 3 is a perspective view of the Figure 2 shown spindle head holder in a second position of the chuck, Figure 4 a perspective view of a spindle head holder according to a second embodiment of the invention, Figure 5 a perspective view of the in Figure 4 shown spindle head holder, in which the chucks are in a second position relative to each other and Figure 6 is a perspective view of a rear view of the Figures 4 and 5 shown spindle head holder, whereby the chucks are adjusted according to the position in Figure 5 are set.

[0023] The Figure 1The rolling stand 1 shown can, for example, be designed as a rolling stand 1 in a so-called 4-high configuration and comprises two driven work rolls and two backup rolls which are mounted in a roll stand 2. On the drive side of the rolling stand 1, which is Figure 1 As 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 secured. The configuration of the rolling stand 1 is not critical to the invention.

[0024] The spindle head holder 3 comprises first and second holders 6, 7, which are rigidly connected to the roll stand 2.

[0025] Figure 2 shows a first variant of the spindle head holder 3 according to the invention in the open position. In all figures, identical components are provided with the same reference numerals.

[0026] The spindle head holder 3 according to the invention comprises a first upper chuck 8 and a second lower chuck 9, each designed for clamping or non-rotatably receiving the first and second spindle heads 4, 5. The chucks 8 and 9 are formed by a left holding jaw 10 and a right holding jaw 11, which are mounted by guide columns 12 in receptacles 13 of the holders 6, 7. The holding jaws 10, 11 can be moved toward and away from each other in an opening and closing movement via hydraulic cylinders 14, which are supported against the holders 6, 7 as abutments.

[0027] The holding jaws 10, 11 each comprise an upper holding jaw segment 15 and a lower holding jaw segment 16, wherein the lower holding jaw segment 16 is designed to be linearly adjustable relative to the upper holding jaw segment 15, such that the lower holding jaw segments 16 can be lowered relative to the upper holding jaw segments 15, as shown in Figure 3 is shown.

[0028] Figure 3 shows the closed position of the chucks 8, 9, in which the holding jaw segments 15, 16 are closed, clamping the spindle heads 4, 5. Each holding jaw segment 15, 16 has an approximately C-shaped contour, encompassing approximately 90° of the spindle head circumference. A bearing block 17 is attached to the distal end of each holding jaw segment. Four bearing blocks 17 form a chuck 8, 9.

[0029] The bearing blocks 17 of the holding jaw segments have beads 24 which, in the clamped position, with grooves 25 of the spindle head, provide axial fixation of the spindle head.

[0030] The adjustability of the lower holding jaw segments 16 relative to the upper holding jaw segments 15 is achieved by adjusting cylinders 18. The lower holding jaw segments 16 are guided vertically displaceably on the upper holding jaw segments 15. For this purpose, corresponding guide rails 19 are provided on the lower holding jaw segments 16.

[0031] Alternatively, the upper holding jaw segments 15 can be designed to be adjustable relative to the lower holding jaw segments 16.

[0032] A second embodiment of the rolling stand 1 according to the invention or the spindle head holder 3 is shown in the Figures 4 to 6 As already mentioned above, identical components are provided with the same reference numerals.

[0033] In the second embodiment according to the invention, the spindle head holder 3 comprises a first and a second holder 6, 7, which are also each rigidly fastened to the roll housing 2 of the rolling stand 1. An upper and a lower clamping head 20, 21 are fastened to each holder 6, 7. The upper clamping heads 20 and the lower clamping heads 21 each form a chuck 8, 9, wherein the upper clamping heads 20 are adjustable independently of the lower clamping heads 21 in the sense of an opening and closing movement using hydraulic cylinders 14. Each clamping head 20, 21 is provided with a clamping shell 22 at its end leading in the closing direction, wherein the clamping shells 22 of a chuck 8, 9 each clamp a spindle head 4, 5.

[0034] In the second embodiment according to the Figures 4 to 6The spindle heads 4, 5 are not shown for the sake of simplicity. The lower clamping heads 21 are designed to be vertically adjustable relative to the upper clamping heads 20. In the described embodiment, the upper clamping heads 20 are fixedly attached to the holders 6, 7, whereas the lower clamping heads 21 are designed to be adjustable relative to the upper clamping heads 20, just as the lower holding jaw segments 16 according to the first embodiment of the invention are designed to be adjustable relative to the upper holding jaw segments 15.

[0035] In the embodiment according to the Figures 4 to 6It can be provided that the upper clamping heads 20 can 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 holders 6, 7. The clamping heads 20, 21 are guided vertically in slots 23 of the holders 6, 7 by a guide rail 18, as can be seen from the rear view in Figure 6 can be seen. The guide rails 19 can be made of a self-lubricating material. Alternatively or additionally, the elongated holes 23 can have sliding linings made of a self-lubricating material.

[0036] The clamping heads 20, 21 of the holding jaw segments have beads 24 which, in the clamped position, with grooves 25 of the spindle head, provide axial fixation of the spindle head.

[0037] Figure 5shows the spindle head holder 3 in a state in which the lower clamping heads 21 are in a lowered position, whereas in Figure 6 the lower clamping heads 20 are shown in a raised position. List of reference symbols 1 Rolling stand 21 lower clamping heads 2 Roller stand 22 clamping shells 3 Spindle head holder 23 Slotted holes 4 first, upper spindle head 24 bulges 5 second, lower spindle head 25 grooves 6 first owner 7 second holder 8 first, upper chuck 9 second, lower chuck 10 left holding jaw 11 right holding jaw 12 Guide columns 13 Photographs of the holders 14 hydraulic cylinder 15 upper holding jaw segments 16 lower holding jaw segments 17 bearing blocks 18 Adjusting cylinder 19 Guide rails 20 upper clamping heads

Claims

1. Roll stand (1) for the rolling of metal flat products, comprising at least two driven rolls, which form a rolling gap therebetween for the rolling material, and at least one spindle head mounting (3) for temporary rotationally secure reception of drive-side heads of spindles of the rolls, wherein the spindle head mounting (3) comprises at least one first and second chuck (8, 9), which respectively receive a first and a second spindle head (4, 5) and which are actuable in the sense of an opening movement and a closing movement, wherein the first and / or second chuck (8, 9) in installed position are constructed to be vertically adjustable in the position thereof relative to one another and wherein the adjustability of the first and / or second chuck (8, 9) is independent of the opening movement and closing movement, wherein the chucks (8, 9) comprise first and second retaining jaws (10, 11), wherein the retaining jaws (10, 11) are formed to be complementary to one another and are adjustable towards and away from one another in the sense of an opening movement and a closing movement or the chucks (8, 9) are formed by hydraulically actuable and movably guided clamping heads (20, 21), wherein the spindle head mounting comprises at least four clamping heads (20, 21) arranged in pairs relative to one another, wherein two clamping heads (20, 21) form a respective chuck (8, 9), characterised in that the retaining jaws (10, 11) are of multi-part construction and comprise first and second retaining jaw segments (15, 16), which are vertically adjustable relative to one another and which each form a respective chuck (8, 9), wherein the adjustability of the lower retaining jaw segments (16) relative to the upper retaining jaw segments (15) is produced by adjusting cylinders (18), the lower retaining jaw segments (16) are guided at the upper retaining jaw segments (15) to be vertically displaceable and corresponding guide strips are provided at the lower retaining jaw segments (16) or alternatively the upper retaining jaw segments (15) are constructed to be adjustable relative to the lower retaining jaw segments (16) or the lower clamping heads (21) are constructed to be vertically adjustable relative to the upper clamping heads (20), wherein the upper or lower clamping heads (20, 21) are secured to holders (6, 7), which are rigidly connected with a roll housing (2) of the roll stand and at which the clamping heads (20, 21) are guided to be movable.

2. Roll stand (1) according to claim 1, characterised in that the first and / or second chucks (8, 9) are adjustable relative to one another into two discrete positions.

3. Roll stand (1) according to one of claims 1 and 2, characterised in that the adjusting movement of the chucks (8, 9) is constrainedly guided.

4. Roll stand (1) according to any one of claims 1 to 3, characterised in that the guidance of the chucks (8, 9) is configured to be self-lubricating.

5. Roll stand (1) according to any one of claims 1 to 4, characterised in that the first and second chucks (8, 9) are actuable independently of one another.

6. Roll stand (1) according to any one of claims 1 to 5, characterised in that the retaining jaws (10, 11) have grooves and / or beads (24) which extend in the circumferential direction of a spindle head (4, 5) to be clamped.

Images