EP3984662B1 - Transition rolling stand and edging rolling stand - Google Patents

Description

The present invention relates to a transfer roller table which enables or is provided for the transport of short metallic products, in particular rolled stock, through an edging roll stand; an edging mill for edging metal products comprising the transfer roller table according to the invention; and a rolling train comprising the edging roll stand according to the invention.

Edger roll stands are known in principle in the prior art. They typically have an infeed stand roller, an outfeed stand roller and a transfer roller table in between. The inlet stand roller and the outlet stand roller are usually driven in rotation and in this respect are also provided for transporting the rolled product through the edging roll stand.

On the one hand, it is known in the state of the art not to drive the middle rollers of the transfer roller table between the inlet stand roller and the outlet stand roller in rotation. However, this has the disadvantage that the metallic products that are shorter than the center distance between the inlet stand roller and the outlet stand roller are not conveyed at least temporarily during their transport through the edging roll stand. Their transport through the edging roll stand can therefore come to a standstill.

In contrast, the British patent application discloses GB 2 516 043 A a rotary drive for the center rollers of a transfer roller table. The drive essentially consists of a chain, with the help of which the torque of the driven infeed stand roller and the rotationally driven outlet stand roller is picked up and transmitted to the middle rollers. In addition, the British patent application teaches designing the middle rollers so that they can be pivoted upwards out of the middle of the edging roll stand.

Another edging roll stand with a transfer roller table according to the preamble of claim 1 is also known from the German patent application DE 10 2019 217 353 A1 known. The drive concept disclosed herein for driving the center rollers of the transfer roller table provides a roller unit housed in a housing, which includes two center rollers, a separate drive arranged below the center rollers, and a gear. The two middle rollers of the transfer roller table are driven by a separate drive. The torque is transmitted to the two center rollers via several spur gears of the gearbox.

Against this background, the object of the present invention is to provide a transfer roller table that is improved compared to the prior art and has an alternative drive concept. In a further aspect, the present invention is based on the object of providing an edging roll stand which is improved over the prior art.

Description of the invention

According to the invention, the object is achieved according to a first aspect by a transfer roller table with the features of patent claim 1.

The transfer roller table for an edging roll stand comprises a transfer table and at least one center roller that can be driven in rotation via a drive motor, the at least one center roller and the drive motor being designed in the form of a modular roller unit.

In the context of the invention, a modular roller unit is understood to mean a compact unit made up of a central roller and a drive motor assigned to the central roller. If the transfer roller table includes a plurality of center rollers, these can be combined and grouped along or transverse to a transport or rolling direction.

Such a drive concept offers the advantage that each of the center rollers is driven by a separate drive motor, so that the torque is transmitted directly, in contrast to the drive systems known from the prior art, and thus without shock-sensitive gearing elements of a gear. In addition, such a drive system in a transfer roller table with several center rollers prevents different torques from acting on the individual center rollers, as is the case, for example, with a drive system in which two or more center rollers are driven in rotation via a drive motor. In this way, different torques and the damaging stresses in the drive system resulting from different torques can be avoided.

Due to the modular design of the roller unit, it is particularly easy to install and remove it, which means that the transfer roller table is not only very easy to maintain, but can also be easily adapted to the respective rolling situation. In addition, no complex gear lubrication is required.

This creates a transfer roller table that offers a compact and robust unit, which means that it can only be built as wide transversely to the rolling direction as the minimum distance at which the edging rollers of an edging roller stand can be moved together.

Further advantageous refinements of the invention are specified in the dependently formulated claims. The features listed individually in the dependent claims can be combined with one another in a technologically meaningful manner and can define further refinements of the invention. In addition, the features specified in the claims are specified and explained in more detail in the description, with further preferred configurations of the invention being presented.

The drive motor can be in the form of an electric, hydraulic and/or pneumatic drive and is preferably a radial piston motor. Furthermore, the at least one center roller and/or the drive motor can be cooled.

Provision is preferably made for the drive motor to be able to be connected to the modular roller unit via a plug-in connection, as a result of which the flexibility of the transfer roller table is additionally increased.

The particularly compact structure of the roller unit results according to the invention from the fact that the at least one central roller is designed as a hollow roller and the drive motor is arranged at least partially inside the central roller designed as a hollow roller.

In an advantageous embodiment variant, the at least one center roller is non-rotatably connected to a shaft which is rotatably arranged or mounted in a bearing housing of the modular roller unit, preferably via a roller bearing arranged in the bearing housing, for example a spherical roller bearing.

According to one embodiment, the center roller can be designed with the shaft in the form of a one-piece component. However, it is preferably provided that the center roller and the shaft are formed from individual components which are connected to one another. In a particularly advantageous embodiment variant it is therefore provided that the shaft has at least one connecting element which extends radially from the shaft and via which it is non-rotatably connected to the center roller, for example in a non-positive manner. The connecting element can be in the form of a plurality of radially extending arms or a single disc-shaped body.

In order to enable a detachable connection between the shaft and the drive motor, the modular rolling unit includes a coupling, such as an elastomeric coupling, via which the shaft can be frictionally connected to a drive shaft. The drive shaft can be designed as a separate component which is non-rotatably connected to the drive motor arranged in the modular reel unit. Alternatively, the drive shaft can also be part of the drive motor. In this context, it is preferably provided that the shaft is rotatably mounted at its end axially opposite to the clutch and/or to the drive motor via the roller bearing, in particular spherical roller bearing, arranged in the bearing housing.

Furthermore, it is preferably provided that the shaft as well as the drive shaft extend along a common axis through the central roller designed as a hollow roller.

In order to ensure particularly low-friction mounting of the center roller, the transfer roller table includes a bearing sleeve with at least one roller bearing arranged on the outside, such as a spherical roller bearing, via which the at least one center roller is rotatably mounted. In this context, it is particularly preferably provided that the bearing sleeve is arranged coaxially around at least a section of the drive shaft, around at least a section of the shaft and/or around at least a section of the clutch.

In order to monitor the speed and/or the wear of the at least one middle roller, preferably the several middle rollers, in the transfer roller table according to the invention, the modular roller unit, preferably the drive motor, comprises a first sensor element and/or a second sensor element.

In a preferred embodiment variant, the transfer roller table comprises at least two modular roller units. Furthermore, the transfer roller table can also include three, four or five of the modular roller units. Each of the middle rollers can have the same diameter or a different diameter and/or a barrel length that is the same or different from one another.

With at least two modular roller units in the transfer roller table, the center rollers of these are advantageously spaced apart from one another in the transport direction such that the (axial) distance AR1 between the at least two center rollers is:
AR1 ≤ (LW - LA) / NM, where NM is the number of middle rollers actively involved in the transport, LW is the shortest length of a metal product and LA = a length portion of the metal product, where LA values between 0.1 to 400.0 mm, preferably 50.0 to 300.0 mm, more preferably between 100.0 to 200 mm, and NM = 2 to 5, preferably 2 to 3.

In a further aspect, the present invention also relates to an edging roll stand for edging metal products, in particular rolling stock, having two edging rolls which can be adjusted in relation to one another and which can be adjusted to a minimum distance (d) transversely to the transport direction; and the one transfer roller table according to the invention arranged between the two edging rollers.

In one embodiment variant, the edging roll stand can have at least one first roller, preferably an infeed stand roller, arranged in the transport direction in front of the transfer roller table, and optionally at least one second roller, preferably an outlet stand roller, arranged in the transport direction behind the transfer roller table, for conveying the metal product through the edging roll stand. If the drive motor of the modular roller unit is operated in reverse mode, the at least one central roller is rotated alternately in clockwise and counterclockwise rotation, which is why the transport direction then changes in each case. The at least one second roll, preferably the at least one outfeed stand roll, then becomes the at least one first roll, preferably the at least one infeed stand roll, and vice versa.

It is advantageously provided that the at least one center roller of the at least one modular roller unit of the transfer roller table is spaced apart in the transport direction from the first roller arranged directly in front of it and/or the second roller arranged directly behind it, or vice versa, such that for the (axial) distance AR2 between applies to these:
AR2 ≤ (LW - LA) / N, where N is the number of rollers actively involved in the transport and LW is the shortest length of the metal product, and LA is a length fraction of the metal product, where LA values between 0.1 to 400.0 mm, preferably 50.0 to 300.0 mm, more preferably between 100.0 to 200 mm, and N ≥ 2.

Furthermore, the edging roll stand can be designed in such a way that the at least two center rolls are nested in one another, such that their barrels have different lengths and the barrel of at least one of the at least one Center roller is designed such that the rolling circles of the balls engage with each other, the (axial) distance between the at least two center rollers then being smaller than the smallest roller diameter.

In a further aspect, the present invention also relates to a rolling train comprising the edging roll stand according to the invention. Depending on the design, the at least one middle roller or the transfer roller table can be arranged symmetrically or asymmetrically in relation to a middle axial line of the rolling train.

figure designation

• Fig. 1 eine Ausführungsvariante des erfindungsgemäßen Überleitrollentisches in einer perspektivischen Darstellung,
• Fig. 2 den in Figur 1 gezeigten Überleitrollentisch in einer Schnittdarstellung,
• Fig. 3 eine Ausführungsvariante der modularen Rolleneinheit in einer perspektivischen Darstellung,
• Fig. 4 eine Ausführungsvariante des erfindungsgemäßen Stauchwalzgerüstes in einer Draufsicht, und
• Fig. 5 eine Ausführungsvariante der erfindungsgemäßen Walzstraße in einer seitlichen Ansicht.

The invention and the technical environment are explained in more detail below with reference to the figures. It should be pointed out that the invention should not be limited by the exemplary embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and findings from the present description and/or figures. In particular, it should be pointed out that the figures and in particular the proportions shown are only schematic. The same reference symbols designate the same objects, so that explanations from other figures can be used as a supplement if necessary. Show it:

• 1 a variant of the transfer roller table according to the invention in a perspective view,
• 2 the in figure 1 shown transfer roller table in a sectional view,
• 3 a variant of the modular roller unit in a perspective view,
• 4 an embodiment of the edging roll stand according to the invention in a plan view, and
• figure 5 an embodiment of the rolling train according to the invention in a side view.

In figure 1 an embodiment variant of the transfer roller table 1 according to the invention is shown in a perspective representation, which is usually used in an edging roll stand 2 (please refer 4 ) is arranged between two upsetting rollers 3, 4 and is provided for transporting a metal product to be upset, such as a rolled product 5. The transfer roller table 1 enables the transport of both short and long metallic products 5 and an acceleration of these through the edging roll stand 2. The entire transfer roller table 1 has a modular structure and is essentially formed by a housing frame 6, which has a transfer table 7 and, in this case, two modular Includes roller units 8, 9, whose central rollers 10, 11 each extend through a recess 12, 13 of the transfer table 7 therethrough. In the embodiment shown, each of the center rollers 10, 11 has the same diameter and the same barrel length.

A perspective view of the modular roller unit 8 is shown in FIG figure 3 shown. This includes, on the one hand, the center roller 10, a drive motor 14 with a speed sensor 15, the drive motor 14 being a radial piston motor, and a bearing housing 16.

In figure 2 the transfer roller table 1 is shown in a sectional view according to the section AA, from which the internal structure of the modular roller unit 8, 9 results in particular. Here stationary components are shown with solid lines and rotating components with dashed lines. As can initially be seen from the illustration, the central roller 10 is designed as a hollow roller and is arranged coaxially around a bearing sleeve 17 which is connected to the housing frame 6 in a stationary manner. A roller bearing 18 , in particular a self-aligning roller bearing, is arranged between the bearing sleeve 17 and the central roller 10 embodied as a hollow roller, via which the central roller 10 is rotatably mounted on the bearing sleeve 17 .

On the bearing housing side, the center roller 10 is non-rotatably connected to a shaft 19 via a radially extending connecting element 20 , which in the present case is designed in the form of a flange-like disk-shaped body and forms part of the shaft 19 . The shaft 19 is rotatably mounted at its end facing away from the drive motor 14 in the bearing housing 16 of the modular roller unit 8 via a roller bearing 21 also designed as a self-aligning roller bearing. At its end facing the drive motor 14, the shaft 19 can be positively and/or non-positively connected to a drive shaft 23 via a coupling 22 in order to be able to transmit torque from the drive motor 14 to the shaft 19 or the center roller 10. The drive shaft 23 is designed as a separate component and is connected to the drive motor 14 in a torque-proof manner.

As can be seen from the sectional view, the shaft 19 and the drive shaft 23 extend along a common (rotational) axis (A) through the bearing sleeve 17 and the central roller 10, which is designed as a hollow roller. In this respect, the shaft 19 and the drive shaft 23 are at least partially arranged inside the central roller 10 designed as a hollow roller.

figure 4 shows the edging roll stand 2 according to the invention in a plan view. In the middle is the transfer table 1 with the center rollers 10, 11 for transporting a metal product 5 to be upset in a transport direction T minimum distance d can be moved together. The center rollers 10, 11 arranged between the edging rollers 3, 4 then serve to support and convey the metallic product (see figure 5 ) during its transport through the edging roll stand 2. As indicated by the distance d, the transfer roller table 1 arranged between the two edging rolls 3, 4 is at most as wide as the minimum distance d at which the two edging rolls 3, 4 can be moved together. Furthermore, the present edging roll stand 2 comprises an inlet stand roller 24 arranged in the transport direction T in front of the transfer roller table 1 and an outlet stand roller 25 arranged in the transport direction T behind the transfer roller table 1.

In figure 5 an embodiment of a rolling train 26 according to the invention is also shown in a side view, which has the edging roll stand 2 with the transfer roller table 1 arranged between the two edging rolls 3, 4 and a rolling stand 27 arranged in the transport direction T in front of the edging roll stand 2. A media feed 28 and a control device 29 for the transfer roller table 1 are also shown purely as an example.

Reference sign

1

transfer roller table

2

edging mill stand

3

edging roller

4

edging roller

5

metallic product / rolled product

6

case frame

7

transfer table

8th

(first) modular reel unit

9

(second) modular reel unit

10

center roll

11

center roll

12

recess

13

recess

14

Drive motor / radial piston motor

15

speed sensor

16

bearing housing

17

bearing sleeve

18

roller bearing

19

Wave

20

fastener

21

roller bearing

22

coupling

23

drive shaft

24

infeed stand roller

25

outlet stand roll

26

rolling mill

27

mill stand

28

media feed

29

control device

i.e

Distance

T

transport direction

A

axis

Claims (15)

1. Transfer roller table (1) for an edging roll stand (2), comprising a transfer table (7), at least one centre roller (10, 11) and a drive motor (14), by way of which the at least one centre roller (10, 11) is rotationally drivable, wherein the at least one centre roller (10, 11) and the drive motor (14) are constructed in the form of a modular roller unit (8, 9),
   characterised in that
   the at least one centre roller (10) is constructed as a hollow roller and the drive motor (14) is arranged at least partly in the interior of the centre roller (10, 11) constructed as a hollow roller.
2. Transfer roller table (1) according to claim 1, wherein the at least one centre roller (10, 11) is connected with a shaft (19), which is rotatably arranged in a bearing housing (16) of the modular roller unit (8, 9), to be secure against relative rotation.
3. Transfer roller table (1) according to claim 2, wherein the shaft (19) comprises at least one connecting element (20) which extends radially from the shaft (19) and by way of which the shaft (19) is connected with the centre roller (10, 11) to be secure against relative rotation.
4. Transfer roller table (1) according to claim 2 or 3, wherein the shaft (19) is rotatably mounted by way of a roller bearing (21) arranged in the bearing housing (16).
5. Transfer roller table (1) according to any one of the preceding claims 2 to 4, wherein the shaft (19) is frictionally and/or mechanically positively connectible with a drive shaft (23) by way of a coupling (22), wherein the drive shaft (23) is preferably connected with the drive motor (14), which is arranged in the modular roller unit (8, 9), to be secure against relative rotation.
6. Transfer roller table (1) according to claim 5, wherein the shaft (19) is rotatably mounted at its end, which is axially opposite the coupling (22) and/or the drive motor (14), by way of the roller bearing (21) arranged in the bearing housing (16).
7. Transfer roller table (1) according to claim 5 or 6, wherein the shaft (19) and the drive shaft (23) extend along a common axis (A) through the centre roller (10, 11) constructed as a hollow roller.
8. Transfer roller table (1) according to any one of the preceding claims, further comprising a bearing sleeve (17) with at least one externally arranged roller bearing (18), by way of which the at least one centre roller (10, 11) constructed as a hollow roller is rotatably mounted.
9. Transfer roller table (1) according to any one of the preceding claims, wherein the modular roller unit (8, 9), preferably the drive motor (14), comprises a first sensor element (15) by way of which the rotational speed of the centre roller (10, 11) can be monitored as well as optionally comprises a second sensor element by way of which wear of the centre roller (10, 11) can be monitored.
10. Transfer roller table (1) according to any one of the preceding claims, wherein this comprises at least two modular roller units (8, 9) and wherein the at least two modular roller units (8, 9) are so spaced from one another in transport direction (T) that for the (axial) spacing AR1 between the at least two centre rollers (10, 11) there applies: $$\mathrm{AR}1\le \left(\mathrm{LW}-\mathrm{LA}\right)/\mathrm{NM},$$

    

    wherein

    NM = number of the centre rollers (10, 11) actively participating in the transport,

    LW = shortest length of a metallic product (5),

    LA = a length component of the metallic product (5) and LA values are between 0.1 to 400.0 mm, preferably 50.0 to 300.0 mm, more preferably between 100.0 to 200.0 mm, and NM = 2 to 5.
11. Transfer roller table (1) according to any one of the preceding claims, wherein the drive motor (14) is constructed in the form of an electric, hydraulic and/or pneumatic drive and is preferably a radial piston motor.
12. Edging roll stand (1) for edging metallic products (5), particularly a rolling material, comprising two edging rolls (3, 4) which are adjustable relative to one another and are adjustable transversely to the transport direction (T) to a minimum spacing (d), and a transfer roller table (1), which is arranged between the two edging rolls (3, 4), according to any one of the preceding claims.
13. Edging roll stand (10) according to claim 12, further comprising at least one first roller (24), particularly an inlet stand roller (24), which is arranged in front of the transfer roller table (1) in transport direction (T), and optionally at least one second roller (25), particularly an outlet stand roller (25), which is arranged behind the transfer roller table (1) in transport direction (T), for conveying a metallic product (5) through the edging roll stand (2).
14. Edging roll stand (1) according to claim 12 or 13, wherein the at least one centre roller (10, 11) of the at least one modular roller unit (8, 9) is spaced in such a way in transport direction (T) from the first roller (24) arranged directly in front thereof and/or the second roller (25) arranged directly therebehind that for the (axial) spacing AR2 between these there applies: $$\mathrm{AR}2\le \left(\mathrm{LW}-\mathrm{LA}\right)/\mathrm{N},$$

    

    wherein

    N = number of the rollers (24, 25) actively participating in the transport,

    LW = shortest length of a metallic product (5),

    LA = a length component of the metallic product (5) and LA values are between 0.1 to 400.0 mm, preferably 50.0 to 300.0 mm, more preferably between 100.0 to 200.0 mm, and N > 2.
15. Rolling train (26) comprising an edging roll stand (2) according to any one of the preceding claims 12 to 14.

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