EP3409388A1 - Device for guiding metal strips having wear bodies in a finishing train - Google Patents

Abstract

The application relates to a device for laterally guiding a metal strip (1, 13) running between two rolling mills (2, 3, 8, 9) of a finishing train via a loop lifter (4, 12). The device comprises at least one main body module (14) with a guide plane (15) and a plurality of wear bodies (18, 19, 20) with a wear surface (21, 22, 23) which can be rotated in a plurality of rotational positions. At least two wear bodies (18, 19, 20) are arranged between one of the roll stands (2, 3, 8, 9) and the loop lifter, the area of the wear surface (21, 22, 23) of adjacent wear bodies (18, 19, 20) being arranged ) increases in the direction of the loop lifter (4,12) seen. During operation of the system, at least one of the wear bodies is rotated while the metal belt (1, 13) is running.

Description

Field of engineering

The present invention relates to a device for lateral guidance of a running between two stands of a finishing train with different paths over a variable in various positions loop loom metal belt.

State of the art

In the production of metal strips these are rolled after rolling in a reversing mill in a finishing mill in several rolling stands continuously and passed by means of roller ways with Laminarwasserkühlung to reels, where they are wound up. In the finishing mill, it is necessary to subject the metal strips of a lateral guide, so that centric entry into the nip of the rolling stands takes place. Side guide devices are called guide rulers. The edges of the running metal strip, on which the devices for lateral guidance act, cause wear on the - attached to the guide rulings - wear strips or their wear surfaces. For certain material qualities, the band edges rub off. The abraded material may adhere to the guide rulers and create so-called packages. If they fall on the metal band, this can lead to surface defects on the metal band. The wear surfaces of the wear strips must therefore be regularly renewed and cleaned depending on the production program.

It is known, to reduce the effort in the renewal not always replace the entire Schleißleisten the guide rulers. For example, in WO2015043926A1 - The disclosure of the disclosure of the present application is included - described that in a base body module with management level also rotatable wear body are present, which lead the metal strip. To WO2015043926A1 the wear bodies are controlled in several defined Rotatable rotary positions. After a first metal band has passed through the metal belt conveyor, and before a second metal belt enters the metal belt conveyor, the wear bodies are controlled rotated from a first defined rotational position to a second defined rotational position. The second metal strip thus does not run through the wear track cut by the first metal strip into the wear surface of the wear body. Instead, it is guided through an area of the wear surface exposed for the first time to a metal band, where it gradually cuts a new wear track.

When rolling in the finishing train, the length of the metal strip changes. For easier Bandzugregelung or maintaining its tension despite change in length so-called loop lifters are installed between the rolling stands in the finishing mill. This is essentially a role whose horizontal axis of rotation is vertically adjustable. The metal strip is tensioned and guided over the looper roll - also called looper roll - if its surface lies above the pass line of the finishing train. In order to keep a stretched and accelerated metal strip tensioned by rolling, the looper roll is moved out of the pass-line upwards, depending on the force generated by the metal strip on the looper roll. The farther the axis of rotation of the looper roll over the pass-line is, the greater the band entry angle in the following nip, or the strip outlet angle from the previous nip - the metal strip has a different path between the two nips. Lateral guidance should be given for the metal strip at each strip entry angle or strip outlet angle or for each path.

Replacement or manual cleaning of leading wear surfaces in the area of the loop lifter is very complicated and dangerous, since there is little space available in the framework area and - due to the rolling of the approximately 1100 ° C hot metal strip - high temperatures prevail. As a result, such activities can only take place during shutdowns of the finishing train.

Summary of the invention Technical task

It is the object of the present invention to provide an apparatus and a method for operating the device, the side guide for a guided over looper metal strip in a finishing line at each Bandeinlaufbeziehungsweise tape outlet angle the cost and frequency of the need to replace worn parts or a cleaning reduced by wear surfaces.

Technical solution

This task is solved by a
Device for lateral guidance
one between two rolling stands of a finishing train
with different running paths via an adjustable loop looper in different positions
running metal band,
full
at least one main body module with a substantially vertical guide plane, as well as a plurality, in several rotational positions rotatable, Schleißkörper with Schleißfläche, the Schleißflächen the Schleißkörper are substantially flat and in all rotational positions substantially parallel to the management level,
characterized in that
at least two wear bodies are respectively arranged between one of the rolling stands and the loop lifter,
wherein the area of the wear surface of adjacent wear bodies increases in the direction of the loop lifter.

The metal strip is for example a steel strip or an aluminum strip.

The main body module with guide level, for example, a so-called guide ruler, which has a suitable surface for guiding the metal strip, the guide level. For example, it can be one or more on one Support body fastened wear plate (s) to be formed; Support body and wear plate (s) together then form the main body module.
The lateral guidance device may comprise a base body module or a plurality of base body modules. For example, two main body modules, for guiding on one side of the metal strip one each.
The guide level is used for lateral guidance of the metal strip by means of contact with the sides of the metal strip. It limits the freedom of movement of the metal strip in their direction, whereby the metal strip is guided laterally.
The management level is essentially vertical.

In addition to the main body module, the device for lateral guidance also includes a plurality of wear bodies with a wear surface.
A wear body is a body that is subject to wear due to the guidance of the metal strip, at a region called the wear surface.
The wear body is a different component than the main body module, but can be inserted into the main body module or attached to it.
The wear body has at least one wear surface; this is turned towards the metal strip when the metal strip is guided and wears due to contact with the metal strip in the course of the lateral guidance of the metal strip.
The metal strip cuts into the wear body and thus wears it.

The wear surface is essentially flat in the unworn state. The wear surface is the area of the wear body that is provided in operation for the guidance of the metal strip. Of course, the so-called wear body can also have areas that will not come into contact with the metal strip during operation, for example due to their removal from the pass line of the finishing train.

Essentially, the wording should be that slight deviations from the required properties are flat, vertical, parallel, acceptable.

The wear body may be round or have other contours.

The wear body is rotatable in several rotational positions. He can therefore take at least two rotational positions, between which the operator can select and control the rotation and / or regulate accordingly. It is included with that of Wear body sequentially takes a variety of rotational positions while it is rotated. The wear body can be fixed in a desired rotational position, which it has achieved by turning, or be rotated by further rotation in a further rotational position. The rotation can also be very slow, for example, a revolution in 12 hours; In the 12 hours a variety of rotational positions are taken successively.

Between two rolling mills of the finishing train a looper is available. There are at least two wear bodies between a roll stand and the loop lifter.

The area of the wear surface of adjacent wear bodies increases in the direction of the loop lifter.
Thus, for example, if three wear bodies are arranged between a roll stand and a loop lifter following in the direction of travel of the strip, the wear body directly adjacent to the rolling stand has the smallest area of the three wear bodies, and the wear body directly adjacent to the loop lifter has the greatest area. The central wear body has a larger area than its neighbor, which is directly adjacent to the rolling stand; and a smaller area than its neighbor, which is directly adjacent to the loop lifter. If it concerns round Schleißkörper, so the rolling stand directly adjacent Schleißkörper is the smallest diameter, the Schlingheber directly adjacent Schleißkörper the largest diameter, and arranged between these Schleißkörper have a diameter in between.

The looper is - for example, pressure or force controlled - adjustable in different positions and is in operation of the finishing train depending on the properties of the metal strip in different positions. For each position of the loop lifter results in another path for the metal strip between a rolling mill and the directly adjacent looper; it is different in each case the Bandeinlauf- or belt outlet angle. Bandeinlauf- or belt outlet angle refer to the plane in which the roll nips of the two rolling stands are; from the nip of the first rolling mill seen in the strip running direction, the metal strip exits and runs its path in the direction of the nearest scaffold on the Schlaufenheberrolle, where it deflects. From there it runs into the nip of the Tape running direction seen second rolling stand a.

Advantageous Effects of the Invention

A wear body is rotatable about an axis of rotation. In order to prevent the wear of a portion of the wear surface of the wear body from exceeding an acceptable level, the wear body may be rotated about the axis of rotation, thereby turning another portion of the edge of the metal band and being worn therethrough. By repeatedly turning the need for replacement of the wear surface or the wear body can be delayed, as always other areas of the edge of the metal strip are facing and therefore the wear evenly distributed over the wear surface. Thus, the cost of replacing worn parts is reduced, since less frequent replacement is necessary.
It can also help to ensure that packs do not accumulate in one place. Accordingly, the risk of falling on the metal strip is reduced. In addition, existing packages may optionally be ground off the metal strip at a different rotational position of the wear body.

From the rolling stand in the direction of the loop lifter, the metal strip moves farther and farther away from the pass-line of the finishing mill. For each position of the loop lifter results in another outlet and inlet angle and thus another path.

With the device according to the invention, lateral guidance through wear plates is possible at every angle between the pass line of the finishing train and the metal strip. This is made possible by the fact that the wear plates have larger surfaces with increasing proximity to the loop lifter, and thus can also provide lateral guidance with increasing removal of the metal strip from the pass line.
Preferably, the wear bodies are interchangeable, so that when excessive wear of these components can be easily replaced. A more complex replacement of the main body modules -beziehungsweise parts of the main body modules such as wear plates - is less often necessary, since the lateral guidance is sufficient even by the wear body alone. Since the wear bodies can be rotated in different rotational positions, a new area of the wear surfaces can always be worn out, whereby the wear is distributed can and replacement is less necessary.
This saves effort and costs in the maintenance of the device for lateral guidance.

According to a preferred embodiment, at least one wear body can be arranged in a recess of the at least one main body module. If the at least one wear body is arranged in a recess of the at least one main body module, it is possible to perform a simultaneous guidance of the metal strip by the main body module and the wear body - for example, if the wear surface of the wear body does not protrude beyond the management level of the main body module, but at least partially you are lying. If the wear surface as claimed in the invention is substantially planar and parallel to the guide plane, this may be the case, because parallel to the guide plane also comprises in a plane with the guide plane. Or when the wear surface of the wear body does not protrude beyond the management level of the main body module and is not in it, but is further away from the metal strip as the management level of the main body module - and that if the metal strip so far cuts into the main body module, that it also with the wear surface comes into contact and is guided by it.

Preferably, the recess is round. This allows easy rotation of a arranged in this recess wear body when it is rotationally symmetrical or rotationally symmetrical with respect to its axis of rotation.
If the recess is not completely enclosed by the base body module, in this embodiment the edge of the recess in the base body module follows a part of a circle.
The recess may also have other shapes.

In WO2015043926A1 - The disclosure of which is included in the disclosure of the present application - variants are to be taken for the execution of wear bodies, which may also be in the device according to the invention for lateral guidance of a metal belt conveyor running metal strip in a finishing train comprising at least one main body module with an im Substantial vertical management level are applicable.

In the device according to the invention, the wear bodies are preferably arranged such that each travel path leads over each wear surface. For every running path, it therefore applies that it lies partly on each of the wear plates between the rolling stand and the loop lifter - regardless of the distance from the pass-line to the loop lifter roller, all wear bodies then contribute to the lateral guidance.

Another object of the present application is a method for operating a device according to the invention
characterized in that
at least one of the wear bodies is rotated while the metal belt is running. During rotation, he takes a variety of rotational positions. The rotation can also be done very slowly, for example, a revolution in 12 hours.
The rotation can also be interrupted by pauses.
By turning the wear of the wear body can be evenly distributed over the wear surface, which helps to extend the replacement intervals.
The turning can be like in WO2015043926A1 done in defined rotational positions; It can also be done in undefined rotational position with respect to the axis of rotation in the sense that is not predetermined by the operator that at a certain time a certain rotational position is to be taken.

For each position of the loop lifter results in another path of the metal strip. Depending on the position of the loop lifter, the track traced by the metal band is different.

Preferably, lateral guidance takes place on each runway through each wear body. Thus, for each run, it applies that it lies partly on each of the wear surfaces between the rolling stand and the loop lifter - regardless of the distance from the pass-line to the looper roll, all wear bodies then contribute to the lateral guidance.

Brief description of the drawings

• Figur 1 zeigt schematisch eine herkömmliche Vorrichtung zur seitlichen Führung eines zwischen zwei Walzgerüsten einer Fertigstraße über einen Schlingenheber laufenden Metallbandes.
• Figur 2 zeigt schematisch eine Ausführungsform einer erfindungsgemäße Vorrichtung.

Hereinafter, the present invention will be described by way of example with reference to schematic figures.

• FIG. 1 schematically shows a conventional device for lateral guidance of a running between two rolling stands of a finishing train via a loop loom metal strip.
• FIG. 2 schematically shows an embodiment of a device according to the invention.

Description of the embodiments Examples

FIG. 1 shows a side view fragmentary, as in a conventional device, a metal strip 1 runs in the direction indicated by an arrow between two rolling stands 2,3 a finishing train via a loop 4. For lateral guidance of the current metal strip 1, plate-shaped wear strips 5a, 5b are present on the right and left of the loop lifter 4. The loop 4 is adjustable in various positions, which is represented by a double arrow. Depending on the position, the metal strip 1 follows another path from the nip 6 of the first rolling stand 2 in the strip running direction into the nip 7 of the second rolling stand 3 in the direction of strip travel. Only the path belonging to the illustrated position of the loop lifter 4 is shown.

FIG. 2 shows a section of an embodiment of a device according to the invention for the lateral guidance of a rolling mill between 8.9 a finishing train with different running paths 10,11 via an adjustable in different positions looper 12 metal strip 13 in a lateral view. The running direction of the metal strip is shown by an arrow. Shown is a main body module 14 with a substantially vertical guide plane 15 which is arranged between the last in the strip running direction rolling mill 8 and the loop lifter 12. The looper 12, over which the metal strip 13 passes, can be set in various positions; this is illustrated for two positions of the loop lifter roller with closed outline 16 and dashed outline 17. The traced by the metal strip 13 on the highest possible position of the loop lifter 10 is shown in solid, the tracked over the lower position of the loop lifter 11 is shown in dashed lines. The device also includes three wear bodies rotatable in multiple rotational positions 18,19,20, wherein the wear surfaces 21,22,23 of the wear body 18,19,20 are substantially flat and in all rotational positions parallel to the guide plane 15 of the main body module 14. The three wear bodies 18, 19, 20 are arranged between the last rolling stand 8 and the loop lifter 12, as viewed in the direction of travel of the strip. Seen from the roll gap 24 in the direction of the loop lifter 12, the surface of the wear surface 21, 22, 23 of adjacent wear bodies 18, 19, 20 increases, since the diameters of the three round wear bodies 18, 19, 20 increase. In the illustrated embodiment, each travel path leads over each wear surface 21, 22, 23. Regardless of which of the illustrated distances from the pass-line 25 - represented by a broken line - is the Schlingenheberrrolle, wear all Schleißkörper 18,19,20 for lateral guidance at.
In operation of the system shown the Schleißkörper 18,19,20 are rotated - represented by curved arrows, different directions of rotation are possible - while the metal strip 13 is running.
On a representation of the looper 12 and roll stand 9 optionally existing parts for lateral guidance is omitted for reasons of clarity; it may, for example, be a mirror-inverted arrangement to the arrangement shown.

While the invention has been further illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

List of reference numbers

1

metal band

2

rolling mill

3

rolling mill

4

looper

5a, 5b

wear strips

6

nip

7

nip

8th

rolling mill

9

rolling mill

10

path

11

path

12

looper

13

metal band

14

Base module

15

management level

16

Outline looper roll

17

Outline looper roll

18

Schleißkörper

19

Schleißkörper

20

Schleißkörper

21

Schleißfläche

22

Schleißfläche

23

Schleißfläche

24

nip

25

Pass Line

Claims (4)

Device for lateral guidance
one
between two rolling mills (2,3,8,9) of a finishing train
with different running paths via an adjustable in various positions looper (4,12) running
Metal band (1,13),
full
at least one main body module (14) having a substantially vertical guide plane (15),
and a plurality of wear bodies (18, 19, 20) with a sliding surface (21, 22, 23) which can be rotated in a plurality of rotational positions, wherein the wear surfaces (21, 22, 23) of the wear bodies (18, 19, 20) are substantially planar and in all rotational positions are substantially parallel to the guide plane (15),
characterized in that
at least two wear bodies (18, 19, 20) are respectively arranged between one of the roll stands (2, 3, 8, 9) and the loop lifter,
wherein the surface of the wear surface (21, 22, 23) of adjacent wear bodies (18, 19, 20) increases in the direction of the loop lifter (4, 12). Device according to claim 1, characterized in that the wear bodies (18, 19, 20) are arranged such that each travel path leads over each wear surface (21, 22, 23). Method for operating a device according to Claim 1 or 2
characterized in that
at least one of the Schleißkörper (18,19,20) is rotated while the metal strip (1,13) runs. A method according to claim 3, characterized in that on each path (10,11) lateral guidance through each Schleißkörper (18,19,20) takes place.

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