CN115463981A

CN115463981A - Roller table section for a metal strip having a large thickness range

Info

Publication number: CN115463981A
Application number: CN202210653175.7A
Authority: CN
Inventors: M·比肖夫; R·霍夫尔; P·奥斯特海默; J·施温哈默
Original assignee: Primetals Technologies Austria GmbH
Current assignee: Primetals Technologies Austria GmbH
Priority date: 2021-06-10
Filing date: 2022-06-10
Publication date: 2022-12-13
Also published as: EP4101556A1

Abstract

The invention relates to a roller table section for transporting a rolled metal strip, comprising a plurality of transport rollers having parallel roller axes, a deflection unit having an upper deflection roller and a lower deflection roller, a pressure roller and a front guide. The transport rollers are arranged one behind the other, viewed in the transport direction of the metal strip, and the deflection unit is arranged behind the transport rollers. The metal strip is conveyed to a deflection unit by means of a conveyor roller and deflected obliquely downward by means of the deflection unit toward a coiler arranged behind the roller path section. The pressure roller is adjusted from above onto one of the transport rollers. The front guide plate is arranged in front of the pinch roller as viewed in the conveying direction and restricts the metal belt from being lifted up from the conveying roller. The roller path section has a rear guide plate and a drive assigned to the rear guide plate, by means of which the rear guide plate is moved into the region between the pressure roller and the deflection unit and out of this region. In the retracted state, the metal strip is fed by means of the rear guide plate to the drive gap between the upper and lower deflecting rollers.

Description

Roller table section for a metal strip having a large thickness range

Technical Field

The invention relates to a roller table section for transporting a metal strip to be rolled,

-wherein the roller table section has a plurality of transport rollers with roller axes parallel to each other, a deflection unit with an upper deflection roller and a lower deflection roller, a pressure roller and a front guide,

-wherein the transport rolls are arranged one after the other, seen in the transport direction of the metal strip,

-wherein the turning unit is arranged behind the transport rollers, seen in the transport direction, and the metal strip can be conveyed to the turning unit by means of the transport rollers,

-wherein the metal strip can be diverted obliquely downwards by means of the diverting unit towards a coiler arranged behind the roller table section,

-wherein the pressure roller is adjustable from above onto one of the transport rollers,

-wherein the leading flap is arranged in front of the pinch roller as seen in the transport direction and restricts the metal strip from being lifted upwards from the transport roller.

Background

Such roller table sections are well known. They are used to feed metal strips having a relatively large thickness, typically 1.2mm and more, in part even slightly over 25mm, to a coiler arranged behind the roller table section. The pressure rollers are used for pressing the metal strip onto the corresponding conveying rollers. The pressure roller is adjusted to the metal strip in a force-limiting manner after the strip head has passed. Thereby facilitating bending and turning of the metal strip.

Disclosure of Invention

The roller path section thus formed can be used only for transporting metal strips having a relatively large thickness. This design of the roller path section is not suitable if the metal strip has a relatively small thickness of less than 1.2 mm. In order to transport a metal strip having a relatively small thickness, the roller path section is designed such that it has no pressure rollers, but the front guide plate extends up to just in front of the drive gap of the deflection unit. The front guide plate prevents the tape head from being lifted from the transport roller in this case and ensures that the tape head is reliably fed to the deflecting unit. More precisely, such roller track sections can be used even if the metal strip has a slightly greater thickness up to approximately 12-13 mm. If the metal strip has a thickness of approximately 12-13mm or more, a design in which the pressure rollers are not present but the front guide plate extends up to just in front of the drive gap of the deflection unit is not suitable.

The object of the present invention is to further develop a roller path section of the type mentioned at the outset in such a way that it can be used not only for metal strips having a relatively large thickness but also for metal strips having a relatively small thickness.

This object is achieved by a roller table segment having the features of claim 1. Advantageous embodiments of the roller path section are the subject matter of the dependent claims 2 to 8.

According to the invention, a roller path section of the type mentioned at the outset is designed in such a way that,

the roller path section has a rear guide plate and a drive mechanism assigned to the rear guide plate,

the rear guide plate can be moved into and out of the region between the pressure roller and the deflecting unit by means of the drive mechanism and

in the retracted state, the metal strip can be fed to the drive gap between the upper and lower deflecting rollers of the deflecting unit by means of the rear guide.

The drive mechanism can be designed as required, for example as an electric or pneumatic drive. However, it is preferable that the drive mechanism is configured as a hydraulic cylinder unit. This design is particularly robust and reliable.

The rear guide can be moved in and out as desired. The rear guide plate is preferably moved in and out parallel to the roller axis of the transport roller. This embodiment offers great design advantages with respect to the downward or upward movement in and out of the rear guide plate and also with respect to the movement in and out of the rear guide plate in the pivoting movement or in other curved movement movements.

The rear guide can be integral (viewed in the width direction of the rolled stock). However, the rear guide is preferably divided into at least two parts which are moved toward one another for moving into the region between the pressure roller and the deflecting unit and are moved away from one another for moving out of this region. In this case, the drive means are, in addition, the two components each having their own drive. This design also offers design technical advantages. In particular, the displacement path required for the respective component is considerably smaller than in the case of an integrated design of the rear guide.

The above statements regarding the preferred design of the drive unit as a hydraulic cylinder unit apply in this case also to the two drives.

Preferably, one of the two parts has at least one projecting centering element on its abutment face facing the other part and the other part has a receptacle for the projecting centering element on its abutment face facing that one of the parts. In this case, the two parts are moved toward one another when moved in until the projecting centering element is introduced on one of the abutment surfaces into the receptacle on the other abutment surface. This increases the stability of the guide plate in the retracted state.

Preferably, the pressure rollers can be moved in a force-limiting manner onto the respective transport rollers when the rear guide plate is removed, i.e. when transporting a metal strip having a relatively large thickness. As a result, the mode of operation of the pressure roller and of the roller path section can be kept constant overall compared to the advantageous mode of operation of the prior art. The pressure rollers can be positioned preferably in a position above the respective transport rollers when the rear guide plate is moved in, i.e. when transporting a metal strip having a relatively small thickness. This enables the pinch roller to be optimally positioned. In particular, the position can be determined such that the lower region of the pressure roller overlaps the gap between the front guide plate and the rear guide plate.

Drawings

The above described features, characteristics and advantages of the present invention as well as the manner and method of attaining them will become more apparent and the invention will be better understood by reference to the following description of embodiments to be read in conjunction with the accompanying drawings. The drawings herein show in schematic form:

fig. 1 shows a representation of a roller track section according to the invention from one side in an unprepared state;

fig. 2 shows a representation of the roller path section of fig. 1 in a state for transporting a thick metal strip;

fig. 3 shows a representation of the roller path section of fig. 1 in a state for transporting a thin metal strip;

fig. 4 shows a representation of the roller way section of fig. 1 to 3 from above;

FIG. 5 illustrates a control for transporting thick metal strip;

FIG. 6 illustrates a control for transporting a thin metal strip;

FIG. 7 shows components of the back guide;

FIG. 8 shows the abutment face of one component of the back guide; and is

FIG. 9 shows the abutment surface of another component of the back guide.

Detailed Description

Fig. 1 to 4 show one and the same roller path section, even in different states. Accordingly, fig. 1 to 4 are explained together below.

The roller path section serves for transporting the rolled metal strip 1 in a transport direction x (fig. 2, 3). The transport direction x is generally horizontal. For conveying the metal strip 1, the roller table section has a plurality of conveying rollers 2. The transport rollers 2 are arranged one behind the other, viewed in the transport direction x. The transport roller 2 can be rotated about a roller axis 3. The roller axes 3 run parallel to one another. The direction of the roller axis 3 coincides with the width direction y of the metal strip 1 (fig. 4).

Behind the transport roller 2, viewed in the transport direction x, a deflection unit 4 is arranged. The steering unit 4 has an upper steering roller 5 and a lower steering roller 6. The metal strip 1 is conveyed to a deflection unit 4 by means of the transport rollers 2. The metal strip 1 is deflected obliquely downward by means of the deflection unit 4 toward the coiler 7. The coiler 7 is arranged behind the roller table section. The coiler 7 is not part of the roller table section.

Furthermore, the roller path section has a pressure roller 8. The pressure roller 8 can be adjusted from above onto one of the transport rollers 2. This transport roller 2 is usually a transport roller 2 arranged immediately in front of the turning unit 4, viewed in the transport direction x. Therefore, no other transport roller 2 is present between this transport roller 2, which is referred to below as the last transport roller 2, and the turning unit 4. In principle, however, the pressure roller 8 can also be adjusted to the other of the transport rollers 2.

Furthermore, the roller path section has a front guide plate 9. The front guide 9 is arranged in front of the pinch rollers 8 as seen in the transport direction x. It restricts the lifting of the metal strip 1 upwards from the transport rolls 2.

Finally, the roller path section has a rear guide plate 10 (fig. 3, 4) and a drive mechanism 11 (fig. 4). The drive mechanism 11 is assigned to the rear guide 10. By means of the drive 11, the rear guide plate 10 can be moved into the region between the pressure roller 8 and the deflection unit 4 and also out of this region. In the extended state, the rear guide 10 is inactive. It therefore does not affect the transport of the metal strip 1 in the removed state. In the retracted state, the metal strip 1 is fed by means of the rear guide plate 10 to the drive gap 12 (fig. 2, 3) between the upper and

lower deflecting rollers

5, 6 of the deflecting unit 4.

The different states are explained in succession one after the other in conjunction with fig. 1 to 3.

In the state of not being ready (see fig. 1), the front guide 9, the pressure roller 8 and the upper deflecting roller 5 are moved upwards. The rear guide plate 10 (see left half of fig. 4) is moved out of the area between the pinch roller 8 and the steering unit 4.

In order to transport a thick metal strip 1, i.e. a metal strip 1 having a thickness d that is greater than the upper limit thickness do, the rear guide plate 10 (see also the left half of fig. 4) is moved out of the region between the pinch roller 8 and the deflection unit 4. The front guide 9 is moved onto the transport roller 2. The distance between the front guide 9 and the transport roller 2 is set such that it is greater than the thickness d of the metal strip 1. The upper deflecting roller 5 is adjusted so far onto the lower deflecting roller 6 that the metal strip 1 can be deflected by the deflecting unit 4 and in this case towards the coiler 7.

Before the strip head 13 of the metal strip 1 reaches the roller path section, a signal that the metal strip 1 is thick is also sent to the control device 14 of the roller path section according to fig. 5. Subsequently, the control device 14 first actuates the drive 15 for the pressure roller 8 in such a way that the pressure roller 8 remains lifted off the respective transport roller 2, for example the last transport roller 2. It is possible that the pressure roller 8 (see fig. 1) is lifted as far as possible. This is not absolutely necessary. It is sufficient to maintain a sufficiently large distance between the pressure roller 8 and the respective transport roller 2. The distance can be, for example, 50mm, 80mm or 100mm. Other values are also possible.

At a later point in time, the tape head 13 passes over the pinch roller 8. At this point in time or shortly thereafter, the control device 14 actuates the drive 15 in such a way that the pressure roller 8 is moved downward onto the respective transport roller 2. The movement is performed in a force-limited manner. For example, the force F exerted by the drive 15 on the pressure roller 8 can be detected and fed to the control device 14. As a result, the pressure roller 8 is moved in a force-limiting manner onto the respective transport roller 2 when the rear guide plate 10 is moved out. The displacement is continued until the pressure roller 8 reaches the metal strip 1 and the force exerted by the pressure roller 8 on the metal strip 1 reaches a force limit defined by a force limit. This state is shown in fig. 2. This state is also maintained when the metal strip 1 is further transported.

In order to transport a thin metal strip 1, i.e. a metal strip 1 having a thickness d that is lower than the lower limit thickness du, the rear guide plate 10 (see the right half of fig. 4) is moved into the region between the pressure roller 8 and the deflection unit 4. The edge of the rear guide plate 10 facing the deflection unit 4 points into the transmission slot 12. The front guide 9 is moved onto the transport roller 2. The distance between the front guide 9 and the transport roller 2 is set such that it is greater than the thickness d of the metal strip 1. The upper deflecting roller 5 is adjusted so far onto the lower deflecting roller 6 that the metal strip 1 can be deflected by the deflecting unit 4 and in this case towards the coiler 7.

Before the strip head 13 of the metal strip 1 reaches the roller path section, a signal is also sent to the control device 14 according to fig. 6 that the metal strip 1 is a thin metal strip. Subsequently, the control device 14 actuates the drive 15 in such a way that the pressure roller 8 is positioned above the respective transport roller 2. For example, the target position value p can be supplied to the control unit 14 and, in addition, the actual position value p can be detected and supplied to the control unit 14. In this case, the pressure roller 8 can be moved to its target position p with a position adjustment. In particular, the position to which the pressure roller 8 is moved can be determined according to the illustration in fig. 3 in such a way that a lower region of the pressure roller 8 overlaps the gap between the front and

rear guide plates

9, 10. This state is shown in fig. 3.

At a later point in time, the tape head 13 passes over the pressure roller 8. From this point in time, the pressure roller 8 either continues to be held in its current position p or moves upward.

The upper limit thickness do and the lower limit thickness du can be determined as required. The upper limit thickness do is mostly 1.2mm or more. The lower limit thickness du is mostly 12mm or less. If the lower limiting thickness du is equal to the upper limiting thickness do, each metal strip 1 is obviously either a thick or a thin metal strip. If the lower limit thickness du is greater than the upper limit thickness do, the metal strip 1 with the thickness d between the upper limit thickness do and the lower limit thickness du can be regarded as either a thick metal strip or a thin metal strip, depending on the requirements. Thus, there can be a range of thicknesses for which, optionally, one treatment or another can be taken.

As is schematically illustrated in fig. 4, the drive mechanism 11 is designed as a hydraulic cylinder unit. This design is not mandatory. It is preferred. It can also be seen that the rear guide plate 10 is moved in and out parallel to the roller axis 3 of the transport roller 2. This design is not mandatory, but is preferred.

Fig. 4 also shows a further advantageous embodiment of the invention. Since the rear guide plate 10 is not integrally formed (which is likewise possible in principle) according to fig. 4, but is divided into at least two parts 10', 10 ″. The drive means 11 also has their own drive 11', 11 ″ for the two components 10', 10 ″. Since the rear guide 10 is divided into at least two parts 10', 10 ″, the two parts 10', 10 ″ are moved toward one another in order to be moved into the region between the pressure roller 8 and the deflection unit 4. Instead, the two parts are moved away from each other in order to move out of this region.

Furthermore, the component 10 'has a projecting centering element 17 on its abutment surface 16' facing the component 10 ″ according to fig. 7 and 8. The projecting centering element 17 can be embodied, for example, as a centering pin. In accordance with this, the component 10 ″ has, according to fig. 7 and 9, on its contact surface 16 ″ facing the component 10', a receptacle 18 for a projecting centering element 17. If the two components 10', 10 ″ are moved into the region between the pressure roller 8 and the deflection unit 4, the projecting centering element 17 is introduced into the receptacle 18 shortly before the complete movement. This results in a more stable connection of the two components 10', 10 ″.

It is possible for the component 10', 10 ″ to have more than one projecting centering element 17 and correspondingly also more than one receptacle 18. As an alternative, it is possible that the protruding centering element 17 and the receptacle 18 are not circular. In both embodiments, a twisting of the two components 10', 10 ″ relative to one another is prevented. The two designs can also be combined with one another.

The present invention has many advantages. In particular, the metal strip 1 can be transported over a large thickness range by means of the roller path section according to the invention. Furthermore, the construction is maintenance-free, robust and reliable. Finally, existing roller path sections can also be retrofitted in a simple manner.

Although the invention has been illustrated and described in detail with respect to a preferred embodiment, the invention is not limited by the disclosed example and other variants can be derived therefrom by the person skilled in the art without departing from the scope of protection of the invention.

List of reference numerals:

1. metal strip

2. Transfer roll

3. Roller axis

4. Steering unit

5. Upper steering roll

6. Lower steering roll

7. Coiling machine

8. Compressing roller

9. Front guide plate

10. Rear guide plate

Parts of 10', 10' ' back guide

11. Driving mechanism

Drive device for 11', 11' ' drive mechanism

12. Transmission gap

13. Belt head

14. Control mechanism

15. Driving device of pressing roller

16', 16' ' butt joint surface

17. Projecting centering element

18. Receiving part

d thickness

Upper limit thickness of do

du lower limit thickness

Force F

p position actual value

p position target value

x direction of conveyance

y width direction.

Claims

1. A roller table section for transporting a rolled metal strip (1),

-wherein the roller table section has a plurality of transport rollers (2) with mutually parallel roller axes (3), a turning unit (4) with upper and lower turning rollers (5, 6), a pressure roller (8) and a front guide plate (9),

-wherein the transport rollers (2) are arranged one after the other, seen in the transport direction (x) of the metal belt (1),

-wherein the turning unit (4) is arranged behind the transport rollers (2) as seen in a transport direction (x) and the metal strip (1) can be transported to the turning unit (4) by means of the transport rollers (2),

-wherein the metal strip (1) can be diverted obliquely downwards by means of a diverting unit (4) towards a coiler (7) arranged behind the roller table section,

-wherein the pressure roller (8) is adjustable from above onto one of the transport rollers (2),

-wherein the front guide plate (9) is arranged in front of the pinch rollers (8) as seen in the transport direction (x) and limits the upward lifting of the metal strip (1) from the transport rollers (2),

it is characterized in that the preparation method is characterized in that,

the roller path section has a rear guide plate (10) and a drive mechanism (11) associated with the rear guide plate (10),

-the rear guide (10) can be moved into and out of the area between the pressure roller (8) and the deflection unit (4) by means of the drive mechanism (11), and

-in the moved-in state the metal strip (1) can be fed by means of the rear guide (10) to a transmission gap (12) between upper and lower turning rolls (5, 6) of the turning unit (4).

2. The roller way section according to claim 1,

it is characterized in that the preparation method is characterized in that,

the drive mechanism (11) is configured as a hydraulic cylinder unit.

3. The roller way section according to claim 1 or 2,

the rear guide plate (10) is moved in and out parallel to the roller axis (3) of the transport roller (2).

4. The roller way section according to claim 3,

it is characterized in that the preparation method is characterized in that,

the rear guide (10) is divided into at least two parts (10 ', 10' ') which are moved toward one another for insertion into the region between the pressure roller (8) and the deflection unit (4) and away from one another for removal from this region, and the drive mechanism (11) has its own drive (11 ', 11' ') for the two parts (10 ', 10' ').

5. The roller way section according to claim 4,

it is characterized in that the preparation method is characterized in that,

one of the two components (10 ') has at least one protruding centering element (17) on its abutment surface (16') facing the other component (10 ') and the other component (10' ) has a receptacle (18) for the protruding centering element (17) on its abutment surface (16 ') facing the one component (10').

6. Roller way section according to any one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the pressure rollers (8) can be moved in a force-limited manner onto the respective transport roller (2) when the rear guide plate (10) is removed.

7. The roller way section according to any one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the pressure rollers (8) can be positioned above the respective transport rollers (2) when the rear guide plate (10) is moved in.

8. The roller way section according to claim 7,

it is characterized in that the preparation method is characterized in that,

the position is determined in such a way that the lower region of the pressure roller (8) overlaps the gap between the front and rear guide plates (9, 10).