EP4031304B1 - Intermediate stand guide with a vertical roll stand of a mill train, and method for guiding the rolled stock using the intermediate stand guide - Google Patents

Description

The invention relates to an intermediate stand guide with a vertical rolling stand of a rolling train for guiding the rolling stock with at least one guide element which is mounted on the vertical rolling stand and can be adjusted together with an adjusting movement of a vertical roll and which follows the adjusting movement of the vertical roll.

In hot strip mills, there are often combinations of horizontal rolling stands with upstream vertical rolling stands. The vertical rolling stands serve to reduce the width of the rolling stock to a required width and/or to take on strip guiding tasks, whereas the horizontal rolling stands primarily reduce the thickness of the rolling stock.

When designing the transitions between vertical rolling stands and horizontal rolling stands, precise guidance of the rolling stock, especially the metal strip, is crucial. In particular, the ends of the metal strip require appropriate guidance on the inlet side of the horizontal rolling stand.

Guidance of the rolling stock is also essential in transitions between a horizontal rolling stand and a downstream vertical rolling stand or in an arrangement of several vertical rolling stands arranged one behind the other. In such cases, the guidance of the tape head is also important.

From the EP 1 434 658 B1 is a rolling stock guide device with a vertical rolling mill with a pair of vertical rollers on both sides above the rollers of the Rolling table conveying rolling stock is arranged, transversely to the rolling direction displaceable, adjustable and fixable carriers of vertical guide plates for the rolling stock are known, the guide plates with their respective carriers follow the positioning movement of the vertical roller and the arrangement of the guide devices in front of or behind the Rolls also enable reversing operation of the roll stand without additional devices.

The carrier of the guide plates is connected on the back to a linear actuator of a mechanically or hydraulically driven displacement device which is firmly arranged on the bearing body of the vertical roller. For the rolling operation, the guide plates assigned to the two vertical rolls are brought into the positions corresponding to the width of the rolling stock to be rolled using an adjusting key and guide it as it enters the roll gap and then as it continues through.

The prescribed solution has the disadvantage that the guide plates can only be adjusted by using personnel in the machine. In addition, those from the EP 1 434 658 B1 Known guide plates only provide lateral guidance for the rolling stock. The tilting moments transmitted by the rolling stock can only be absorbed to a limited extent.

An intermediate stand guide with a vertical roll stand according to the preamble of claim 1 is, for example, from JP H04 84616 A known. Further state of the art is from the documents WO 03/033184 A1 and JP H03 238102 A known.

The invention is based on the object of providing an intermediate stand guide with a vertical roll stand, which enables reliable adjustment of the offset dimension outside the machine or outside the vertical and/or horizontal roll stand.

The task is solved with the features of claim 1. Advantageous embodiments of the invention result from the subclaims.

According to one aspect of the invention, an intermediate stand guide with a vertical rolling stand of a rolling train is used to guide the rolling stock into a downstream one Horizontal rolling stand and / or provided from an upstream horizontal rolling stand, which comprises at least one guide element which is mounted on the vertical rolling stand and which is adjustable together with an adjusting movement of a vertical roller assigned to it and which follows the adjusting movement of the vertical roller, the guide element increasing by a predetermined offset amount the edge of the vertical roll that is in engagement with the rolling stock is set back or set back transversely to the rolling direction, the guide element being connected to a traverse of the vertical rolling stand and the offset dimension can be specified, among other things, via an installation distance of the vertical roll to the traverse of the vertical rolling stand.

By appropriately specifying the offset dimension, an adverse influence on the upsetting-rolling process due to unwanted intervention of the guide element is prevented. Nevertheless, the guide element must be positioned with sufficient precision relative to the vertical roller/compressing roller and follow their positioning movement in order to fulfill its guiding task. The permissible offset can be between 0 to 100 mm, preferably between 10 to 80 mm, preferably between 15 to 70 mm and particularly preferably between 20 to 60 mm.

In addition, it can be advantageous if the guide element has an inlet slope. This prevents the rolling stock from accidentally hitting an edge and possibly getting stuck there.

The guide element of the intermediate stand guide according to the invention can, for example, be provided for guiding the rolling stock out of or into a horizontal rolling stand. At least one horizontal rolling stand can be connected upstream and/or downstream of the vertical rolling stand.

At least two guide elements are expediently provided, with each guide element being set back relative to a vertical roller by the predetermined offset dimension and each following the positioning movement of the associated vertical roller.

At least one guide element can be arranged in front of and/or behind a vertical roller in relation to the rolling direction.

If at least two guide elements are provided, which are arranged on both sides of the vertical roll in relation to the rolling direction, guidance of the rolling stock in and against the rolling direction is ensured, for example if the vertical rolling stand is arranged between two horizontal rolling stands. The vertical rolling stand can be provided both to reduce the width and to guide the rolling stock or exclusively to guide the rolling stock.

The guide elements can be designed as angular guide bodies. According to the invention it is provided that the installation distance of the vertical roller relative to the guide element can be predetermined by means of one or more compensating plates of predetermined thickness. This has the particular advantage that the offset dimension can be adjusted outside the machine or the rolling stand using one or more compensating plates of a predetermined thickness. The compensation plates can either be made to measure for the respective application or be available in appropriate gradations.

Preferably, the adjusting movement of the vertical rolls is accomplished via at least one adjusting device, for example in the form of an adjusting cylinder, which acts on the traverse of the vertical rolling stand. The traverse of the vertical rolling stand in turn acts on chocks of the vertical rolls. The vertical rollers are usually mounted in such chocks.

Alternatively, the adjusting cylinder can act directly on the chocks of the vertical rollers.

According to the invention, the at least one compensation plate is detachably connected to a chock that accommodates the vertical roller. Adjusting the offset dimension is usually necessary from time to time due to wear on the vertical roller. The vertical rollers are usually changed at regular intervals, to rework the diameter of the roller due to the wear that has occurred. If one or more compensating plates with corresponding dimensions or corresponding thickness are connected to the relevant chocks of the vertical roller, it is easily possible to specify the offset dimension each time the roll is changed using compensating plates attached to the chock. In the installed position of the chock with the vertical roller in question, the at least one compensating plate is then arranged between the traverse and the chock. As a result, the offset dimension is specified because the guide element in question is connected to the traverse of the vertical rolling stand.

Preferably, the guide element is attached to the traverse with an overload protection device. At least one predetermined breaking point or at least another flexible attachment of the guide element to the traverse can be provided as overload protection.

The guide element can, for example, be attached to the cross member of the vertical rolling stand in question by means of screws, which are equipped with springs that break when a predetermined force is reached. Alternatively, the screws can be provided with predetermined breaking points.

In an expedient and advantageous variant of the intermediate stand guide according to the invention, the guide element is connected to the traverse of the vertical roll stand via a connecting piece, preferably designed as a bar. The latch can, for example, be designed in such a way that locking and unlocking with the traverse is possible, preferably by means of a tool provided for this purpose, so that after unlocking it is possible to move the vertical roller independently of the then stationary intermediate stand guide.

The fixing of the connecting piece relative to the cross member can be designed to be adjustable transversely to the rolling direction, so that further adjustability of the offset dimension X 'can be provided in this way. For example, several engagement locations for the connecting piece can be provided on the crossmember of the vertical scaffolding. If the connecting piece is designed as a latch, you can The traverse must have several receptacles for the bolt. Alternatively, it can be provided that the fixing of the bolt in the receptacle can be changed using spacers, wedges or the like. The latch itself could be wedge-shaped or the overload protection is changed in position using spacers, for example, or the overload protection is exchanged for another overload protection with a changed position for the connecting piece.

It is also advantageous if the connecting piece between the guide element and the traverse can be moved via a hydraulic actuating element, via which the connecting piece can be automatically locked and unlocked. For example, it can be provided that the locking process and the unlocking process are monitored and regulated using sensors.

The movement and/or position of the guide element relative to the vertical roller can be monitored and regulated using sensors.

In an expedient variant of the intermediate stand guide according to the invention, it is provided that the guide element is mounted at least in an upper and/or lower guide bed of a vertical roll stand stand. Preferably, the guide element is slidably mounted in the upper and/or lower guide bed of the vertical rolling stand stand, so that the guide element with the associated vertical roller can carry out a displacement transversely to the rolling direction.

In a particularly advantageous and expedient embodiment of the intermediate stand guide according to the invention, it is provided that the guide element has an upper and/or lower guide, preferably in the form of an upper and/or lower guide stop for the rolling stock. This is particularly advantageous for guiding belt ends. This reliably prevents the band or the band ends from swarming. For this purpose, the guide element can have an L- or C-shaped guide profile. The horizontal and vertical guides formed in this way can be designed to be interchangeable or covered with replaceable wear elements, for example with wear plates be. It is also possible to influence or adjust the offset dimension X' via wear plates that extend to the side of the rolling stock.

In a further embodiment of the intermediate stand guide according to the invention it is provided that the guide element is supported at least on one side on a guide table. The guide table can, for example, be mounted in a horizontal roll stand stand of the horizontal roll stand.

The guide element is preferably slidably supported on the guide table via at least one plain bearing. Furthermore, it can be advantageous if the guide element in the area of the guide table additionally includes a protection against lifting.

The guide element can have at least one removable and therefore replaceable wear plate.

A further aspect of the invention relates to a method for guiding the rolling stock in a rolling train using an intermediate stand guide with one or more of the features described above, the offset dimension becomes.

The positioning movement of at least one vertical roll of the vertical roll stand can be monitored by sensors in order to adjust and monitor the position of the vertical roll and/or the guide element. The displacement movement of the adjusting device can be monitored, for example, with limit switches, position sensors, pressure sensors or the like.

Furthermore, it is advantageous if the movement and/or position of the guide element is also monitored relative to the position of the vertical roller.

The intermediate stand guide according to the invention can have means for detecting the wear of the vertical rollers and/or the guide bodies.

Furthermore, it is advantageous to integrate the functionality of the intermediate stand guide using the sensors into the control processes of the upstream and/or downstream machines or rolling stands in order to be able to react to changed process conditions such as a change in the belt speed.

Preferably, the wear of the vertical roller and/or the guide profiles is detected by sensors and taken into account when adjusting the vertical roller and/or the guide element.

The invention is explained below using an exemplary embodiment shown in the drawings.

Figur 1

eine schematische Draufsicht auf Teile eines Vertikalwalzgerüstes mit einer Zwischengerüstführung gemäß der Erfindung und eines nachgeschalteten Horizontalwalzgerüstes, teilweise im Schnitt, und

Figur 2

eine Seitenansicht der in Figur 1 dargestellten Anordnung.

Show it:

Figure 1

a schematic top view of parts of a vertical rolling stand with an intermediate stand guide according to the invention and a downstream horizontal rolling stand, partly in section, and

Figure 2

a side view of the in Figure 1 arrangement shown.

The figures show part of a rolling train, which is designed, for example, as a hot strip train. The rolling train comprises at least one vertical rolling stand 1 and a horizontal rolling stand 2 downstream in the rolling direction. The rolling direction is illustrated in the figures with an arrow. The vertical rolling stand 1 serves in a known manner to reduce the width of the rolling stock, for example in the form of a metal strip, whereas the horizontal rolling stand 2 serves in a known manner to reduce the thickness of the rolling stock. To guide the rolling stock from the vertical rolling stand 1 into the horizontal rolling stand 2, an intermediate stand guide 3 is provided, which is attached to the vertical rolling stand 1 and effects guidance of the rolling stock on the inlet side of the horizontal rolling stand 2.

The intermediate stand guide 3 according to the invention comprises two guide elements 4, each of which is attached to a cross member 5 of the vertical roll stand 1 in question. The vertical rolling stand 1 comprises a vertical rolling stand stand 15 and two traverses 5 which are displaceably mounted therein and on each of which a vertical roll 6 is held. The vertical rollers 6 are each rotatably and drivably mounted in chocks 7. To regulate the clear width between the vertical rollers 6, the chocks 7 can each be adjusted towards and away from one another using an adjusting device 8. The adjusting devices 8 each include at least one adjusting cylinder 9, which can be acted upon by a hydraulic pressure medium. The guide elements 4 are each arranged set back by an offset dimension X' transversely to the rolling direction in relation to the front edge of the vertical rolls 6, which are in engagement with the rolling stock during operation of the rolling train. This offset dimension X' is initially fixed. The guide elements 4 are firmly connected to the respective traverse 5 and follow the movement of the chocks 7 caused by the adjusting device 8 and thus the feed movement of the vertical rollers 6.

The guide elements 4 are each connected to the traverses 5 of the vertical rolling stand stands 15 with a connecting piece 13 designed as a bar. An overload protection device 14 is provided in the area of the connection. The overload protection 14 is expediently designed in such a way that it is either destroyed in a targeted manner and/or is so flexible that the energy of the overload is changed in a targeted manner. For example, a screw connection with predetermined breaking points or a resilient screw connection can be provided as overload protection 14. Furthermore, the guide elements 4 are slidably mounted in an upper and lower guide bed 16, 17 of the vertical rolling stand stand 15, which enable the guide elements 4 to be displaced transversely to the rolling direction and the guide elements 4 to be supported accordingly. The upper and lower guide beds 16, 17 absorb the forces and moments that occur when guiding the rolling stock. Both the upper and lower guide beds 16, 17 are provided with appropriate lubrication, preferably with grease lubrication.

The guide elements 4 each serve to guide the rolling stock laterally into the roll gap 10 between horizontal rolls 11 of the horizontal rolling stand 2 (see Figure 2 ). The lateral guidance of the rolling stock is particularly useful and advantageous for the ends of metal strips. In order to provide upper and lower guides for such a guide, the guide elements 4 are each provided with a C-shaped guide profile 12 on their side facing the rolling stock transversely to the rolling direction.

At their ends facing the horizontal rolls 11 of the horizontal roll stand 2, the guide elements 4 are each supported via at least one plain bearing block 18 on a guide table 19, which is attached to a horizontal roll stand stand 20 of the horizontal roll stand 2. The guide table 19 is attached and supported on the horizontal roll stand stand 20 so that its guide surface is aligned below the upper edge of the lower horizontal roll 11.

In order to be able to specify or set the offset dimension X ', compensating plates 21 are attached to the chocks 7, via which the distance Since the guide elements 4 are each preferably firmly connected to the traverses 5 via the connecting pieces 13, the distance X between the traverse 5 and the associated chock 7 determines the offset dimension X '. The displacement movement of the vertical roller 6 in question is effected on each side of the rolling stock via the adjusting device 8, which acts directly on the associated traverse 5. The traverse 5 in turn acts on the relevant chocks 7, which together with the vertical roller 6 form a structural unit.

At regular intervals it is necessary to rework the vertical rollers 6 and the diameter D of the vertical rollers 6 due to wear. Without appropriate measures, the offset dimension X 'from the front edge of the vertical roller 6 facing the rolling stock to the relevant guide element 4 would change. By means of the compensating plates 21 provided on the chock 7, it is possible to readjust the offset dimension X 'every time the roll is changed by selecting the corresponding compensating plate 21.

Reference symbol list

1

Vertical rolling stand

2

Horizontal rolling stand

3

Intermediate scaffolding guidance

4

Leadership elements

5

Trusses

6

Vertical rollers

7

Fittings

8th

Adjusting devices

9

Adjusting cylinder

10

Roll gap

11

Horizontal rolling

12

Leadership profile

13

connectors

14

Overload protection

15

Vertical rolling mill stand

16

upper guide bed of the vertical rolling stand stand

17

lower guide bed of the vertical rolling stand stand

18

plain bearing block

19

Leadership table

20

Horizontal rolling stand stand

21

Compensation plates

X

Thickness of the compensation plates

X'

Offset dimension

D

Diameter of the vertical rollers

Claims (16)

1. Intermediate stand guide (3) with a vertical roll stand (1) of a rolling train for guidance of the rolling material by at least one guide element (4), which is mounted on the vertical roll stand (1) and is adjustable together with an adjusting movement of a vertical roll (6) and which follows the adjusting movement of the vertical roll (6), wherein the guide element (4) is arranged to be set back transversely to a rolling direction by a predetermined offset amount (X') with respect to the edge, which is disposed in engagement with the rolling material, of the vertical roll (6), wherein the guide element (4) is connected with a cross member (5) of the vertical roll stand (1), characterised in that the offset amount (X') is predeterminable by way of an installation spacing of the vertical roll (6) from the cross member (5) of the vertical roll stand (1) by means of one or more compensating plates (21) of predetermined thickness and that at least one compensating plate (21) is detachably connected with a chock (7) receiving the vertical roll (6).
2. Intermediate stand guide according to claim 1, characterised in that the guide element (4) is secured to the cross member (5) by overload securing means (14).
3. Intermediate stand guide according to one of claims 1 and 2, characterised in that at least one frangible location and/or at least one other yielding securing of the guide element (4) is or are provided as overload securing means (14).
4. Intermediate stand guide according to any one of claims 1 to 3, characterised in that the guide element (4) is connected with the cross member (5) of the vertical roll stand by way of a connecting member (13) preferably constructed as a bar.
5. Intermediate stand guide according to claim 4, characterised in that the securing of the connecting member (13) relative to the cross member (5) is formed to be adjustable transversely to the rolling direction.
6. Intermediate stand guide according to any one of claims 1 to 5, characterised in that the guide element (4) is mounted at least in an upper and/or lower guide bed (16, 17) of a vertical roll stand housing (15) of the vertical roll stand (1).
7. Intermediate stand guide according to claim 6, characterised in that the guide element (4) is slidably mounted in the upper and/or lower guide bed (16, 17) of the vertical roll stand housing (15).
8. Intermediate stand guide according to any one of claims 1 to 7, characterised in that the position of the guide element (4) is adjustable, preferably hydraulically, relative to the vertical roll (6).
9. Intermediate stand guide according to any one of claims 1 to 8, characterised in that the guide element (4) has a guide profile (12) formed to be L-shaped or C-shaped.
10. Intermediate stand guide according to any one of claims 1 to 9, characterised in that the guide element (4) is supported on at least one side on a guide table (19), which is preferably mounted on a horizontal roll stand housing (20) of the horizontal roll stand (2).
11. Intermediate stand guide according to claim 10, characterised in that the guide element (4) is slidably supported on the guide table (19) by way of at least one slide bearing.
12. Intermediate stand guide according to any one of claims 1 to 10, characterised in that the guide element (4) has at least one exchangeable wear plate.
13. Method of guiding the rolling material in a rolling train with use of an intermediate stand guide according to any one of claims 1 to 12, characterised in that the offset amount (X') is set by way of a detected installation spacing of the vertical roll (6) from the cross member (5) of the vertical roll stand (1).
14. Method according to claim 13, characterised in that the adjusting movement of at least one vertical roll (6) of the vertical roll stand is monitored by way of a sensor system so as to set and monitor the position of the vertical roll (6) and/or of the guide element (4).
15. Method according to one of claims 13 and 14, characterised in that the movement and/or position of the guide element (4) relative to the position of the vertical roll (6) is monitored.
16. Method according to any one of claims 13 to 15, characterised in that the wear of the vertical roll (6) and the guide profile is detected by way of a sensor system and is taken into consideration in the adjustment of the vertical roll (6) and/or of the guide element (4).

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