WO2012055608A1 - Device and method for introducing a metal strip into a metal strip treating installation - Google Patents

Abstract

A device for introducing a metal strip uncoiled from an uncoiling device into a metal strip treating installation, comprising: - a threading table (2), - a first part (7) of a clamping device (3), which in a position in which it rests on the threading table (2) forms a run-up slope (6) for the uncoiled metal strip, the position of the head of the strip (4) having been defined, - a second part (8) of the clamping device (3), which can be pivoted on the first part (7), in order to clamp the head of the strip (4) running onto the run-up slope (6) in a clamping position, and - a two-part bending tool (14), by means of which the part of the head of the strip (4) that protrudes into the gap (17) can be plastically deformed.

Description

description

Apparatus and method for introducing a metal strip into a metal belt treatment plant

Technical area

The present invention relates to a device and a method for introducing a metal strip into a metal treatment plant, wherein the strip head is plastically deformed prior to introduction.

State of the art

The tape head of a metal band, which of a

Unwinding device or a rolling device is unwound, has a shape which for threading in a

Metal belt treatment plant is often not suitable. Such a metal strip treatment plant may be, for example, a rolling stand of a rolling mill, or a facility for

Treatment of the strip surface of a metal strip, such as

for example, a stain. If the head of the metal strip does not have a suitable shape, it can on the one hand to disturbing the threading process or to damage

Parts of the system come, for example, by abutting the tape head on the lateral surface of work rolls of a

Scaffolding or on transport rollers. It may be necessary to change the rollers due to these "rolling marks" or other damaged parts of the system, which affects the efficiency of the system.

To prevent damage when threading a tape head in a rolling mill, you could drive the work rolls sufficiently far apart. However, this would have the disadvantage that in each case a starting and an end piece of the metal strip would have to be discarded. In a rolling mill, which is not in continuous operation, but operated as a so-called "batch mill", this means a significant

Efficiency reduction. It has therefore proven to be advantageous if the tape head on the inlet side, that is before the threading, is plastically deformed so that the risk of damage is reduced. For example, a shape of the strip beginning has proven to be advantageous, which is similar to the shape of a "ski". This shaping can, for example, by a

Device can be achieved, in which a so-called

Threading table is used with a trough, in which the tape head by means of a pressure roller or another

Pressing tool is pressed. This makes it more or less easy to the desired bending shape of the tape head.

Such a device has the disadvantage that the shape of the "ski" depends on the diameter of the metal collar, the thickness of the band and material properties, since the tape head per diameter of the metal band at a different

Position on the threading table comes to rest. In other words, the advantageous "ski" shape is hardly definable because the plastic deformation is different. That too

Nachfedern the threading table leads to different Aufbiegungen. The consequence of this is that the desired "ski shape" often fails and the risk of damage to system components or malfunctions during operation can not be excluded by this type of bending of the tape head.

The introduction of a rolling stock in a treatment device but should be as trouble-free and wear-free and

regardless of the diameter of the metal collar, the shape and the strip thickness of the rolling stock. Also the

Material property of the rolled strip should be on the

Einfädelverhalten have the least possible influence. Presentation of the invention

It is an object of the present invention to provide a

Specify a device and a method for introducing a unwound from a Abhaspei- or unwinding metal strip in a metal strip treatment plant so that the threading process can go as smoothly as possible and without damaging parts of the system and also designed to be as simple as possible.

This object is achieved for a device with the features of claim 1 and for a method with the features of

Claim 11 solved. Advantageous embodiments of

Invention are in the respective dependent claims

Are defined.

The invention is based on the plastic shaping of the strip beginning to a clamping and bending device

use, by means of which the tape head in a clamped state between a fixed and a movable die is plastically deformable. By not being free

lying, but a fixed tape head is bent in a die, it is achieved that the plastic shape is not only independent of the diameter of the tape roll, but also largely independent of the material and the thickness of the metal strip and is also well reproducible. Device according to the invention comprises in one aspect

 - a threading table,

 a first part of a clamping device, which is pivotable about a first axis by means of a drive device and forms a ramp for the chipped metal strip in a position resting on the threading table, the position of the strip head being able to be fixed,

- A second part of the clamping device, which is connected to the first part by means of a hinge and is pivotable by means of a second actuator to clamp the accumulated on the ramp bevel tape head in a clamping position,

 - A two-part bending tool by means of which the protruding into the gap part of the tape head is plastically deformable.

The advantage achievable with the invention is primarily to be seen in the fact that the plastic deformation at a defined position of the tape head and in a defined form is feasible. The thus formed form on

Beginning of tape is independent of the diameter of the metal collar, the thickness of the tape, the material quality and always has the predetermined by the bending tool shape, as in the

plastic deformation of the beginning of the strip always in one

defined position of the bending device comes to rest and is fixed in this position by clamping. As a result, the beginning of the strip can be reproducibly shaped in a similar manner to a "ski" or a skid, with an upwardly curved front end, so that the introduction of the metal strip into a metal treatment plant can take place largely without risk of damage or disturbance.

For example, this can increase the efficiency of a rolling train, since the risk of abutment against work rolls is reduced, thereby avoiding signs of wear. The same applies to a system for treating the strip surface, such as a stain; here, too, the risk of damaging transport rollers or other machine parts or causing malfunctions during threading is lower.

According to a second aspect of the invention, the clamping effecting parts are not by a rotary drive but by a linear displacement movement in the

Brought clamping position. Again, the on the

Run-up bevel accumulated tape head plastically deformed in a clamped position.

Constructively favorable may be an embodiment in which a Part of a two-part bending tool with respect to a part of the clamping device is arranged fixed to the frame and the other part of the bending tool on the other part of the

Clamping device can be moved by means of an actuator to the frame fixedly arranged bending molds. It hardly comes to the Nachfedern and the plastic shaping of the

Band head is always sufficient. The dies can

interchangeable, so that the bending form can be specified plant specific.

In a preferred disclosed embodiment, the

Bending tool of two parts, acting as a bending punch convex part and acting as a die concave part, wherein the axial extent of these two parts is at least as large as the width of the zu

processing metal strip. The convex part can

For example, be a role, the concave part of the

corresponding role counterpart.

Preference is given to a curvature which is the same size at the convex and concave part, so that at the beginning of the tape, a shape pointing in the direction of the upper side of the tape is created similar to a "ski". Through this design of a "ski" shape is achieved that the tape head can be largely introduced without the risk of damage or failure in a metal treatment plant.

It may be favorable if the curvature of the "ski" shape is continuous, for example has the shape of a circular arc.

It is particularly advantageous if the height of the

Curvature at the tape head is smaller than the free passage height of the following machine. As a result, both in threading into a roll stand with conventional roll gap, or differences in height between guide tables and rollers of a roller table in a surface treatment plant or other parts of the plant, both in practice achieved a very good threading behavior.

In a preferred embodiment, each actuator is formed from at least one hydraulic cylinder. As a result, a comparatively thick metal band can be subjected to the corresponding bending forces.

In cold rolling mills are usually metal strips with a smaller compared to hot rolling mill thickness

processed. In the processing of cold tapes, it can be favorable if an actuator is formed from one or more electric drives, for example in conjunction with a rolling-element rotating spindle. This eliminates the cost of the hydraulic supply.

The procedural part of the object is achieved by an operating method for introducing a rolling stock,

In particular, a metal strip, in a rolling treatment plant, wherein the plastic deformation between a concave part and a convex part is performed, wherein the convex part on the second part of the

Clamping device is attached and the concave part is pivotally or slidably connected to the first part of the clamping device and wherein the gap between the two parts is changed for the purpose of plastic shaping by means of an actuator.

Brief description of the drawings

To further explain the invention, reference is made in the following part of the description to the drawings, from which further advantageous embodiments, details and further developments of the invention with reference to a non

restrictive embodiment can be seen.

Show it: FIG. 1 shows an embodiment of the invention

 Device, in a side view, wherein the device is shown in a receiving position, wherein the supplied via a threading table of the device tape head on the

Run-up slope of the device is running high;

Figure 2 shows a position of the device according to the invention, in which the run on the run-up slope head between two clamping parts of

Clamping device is clamped and is bent between two die halves;

FIG. 3 shows an opened position of the two parts of FIG

 Clamping device, wherein the tape head from the

Tool is moved by rotation of the metal collar out;

Figure 4 is a pivoted away from the threading position of the device according to the invention;

Figure 5 is an enlarged view of the clamping and

 Bending device in a position in front of the

 Bending process;

FIG. 6 shows the view according to FIG. 5 in a position after the bending process.

Embodiment of the invention

FIG. 1 shows a side view

Embodiment of the device 1 according to the invention, which consists essentially of a threading table 2, a clamping device 3 and a bending device 14. In the figure 1, the device 1 is shown in a position in which it receives a unwound from a metal collar 5 beginning of tape or tape head 4 to this in the shape further course so that it can easily be threaded into a at the left end of the inlet table 2 subsequent, - but not shown in the figure 1 -, metal band treatment plant. Such

For example, metal belt treatment equipment may

Rolling mill to be a rolling mill, or even a

Treatment device for treating the strip surface, such as a Bandbeize. In both cases, it is important, if possible, no system parts when introducing the

Metal strap damage and to avoid malfunction.

The clamping device 3 consists essentially of a first part 7 and of a second part 8. In the figure 1, the device 1 is shown in a position in which the first part 7 rests on the threading table 2. This position is occupied by a pivoting movement by means of a drive 10 about an axis 11. But it could also be effected by a linear movement. Again

Drawing of Figure 1 is easy to see, the first part 7 has the shape of a wedge, which in this position as

Run-up slope 6 for the incoming tape head 4 acts. The feeding of the tape head 4 is effected by a rotational movement of the metal collar 5 according to the arrow 9. The feeding ends in a predetermined position of the tape head 4 on the

Run-on slope 6. This position can be detected for example by sensors not shown in detail and / or by a rotational movement of the metal federal controlling

Drive and control device can be specified.

The positioned on the ramp 6 6 beginning of the tape is now fixed in succession. This clamping takes place at standstill of the Federal 5 by lowering the second part 8 of the clamping device 3 by means of the actuator 13, which is shown in Figure 2. For this purpose, the part 8 is pivoted about the hinge 12 down. Again, in another structural design, the pivoting movement by a

Be replaced linear motion. The thus fixed tape head 4 is now plastically deformed by the protruding into the gap 17 of a two-part bending tool 14 in part of the

Band head 4 between the two parts 15, 16 of the tool 14 is pressed. It acts as part of the

Bending tool as a punch, the other as a die.

2 shows the bending tool 14 in a position in which the two parts 15 and 16 are moved together, the bending force generated by the actuator 18, which presses the die 16 about the axis of the hinge 19 against the punch 15.

After the plastic shaping of the tape head 4, the clamping of the two parts 7 and 8 is released again, that is, the second part 8 of the clamping device 3 is raised by means of the actuator 13, which is shown in FIG. Thus, the tape head 4 is released again and can be moved out by a rotation of the metal collar 5 according to the arrow 20 from the clamping and bending device 3, 14.

Subsequently, the clamping device 3 together with

Bending device 14 with respect to the threading table 2 pivoted away upward, which is shown in the figure 4. This pivotal movement is again by means of the drive 10 about the axis 11. The threading table 2 is thus released.

The resting on the threading tape head 4 (Figure 4) now has the beginning of the desired "ski" shape 22, whereby the risk of damage when threading the

Band head 4 is reduced in a metal treatment plant. As already stated, the metal strip treatment plant is arranged in the figures 1 to 4 on the left side of the threading table 2, but not shown in detail in the drawing.

As best seen in the enlarged view of Figures 5 and 6, the threading table 2 has a

Recess 21 on. This recess 21 is designed to that lowered onto the threading table 2 part 7 of

Clamping device 3 can be accommodated in this recess 21. As a result, the supply of the tape head 4 in the clamping and bending device 3, 14 is facilitated.

The following are the individual parts of the

Bending device 14 with reference to Figures 5 and 6 closer

explained. As already described above, the bending device 14 consists of two parts, one of which acts as a bending punch 15, the other as a bending die 16 or die. The plastic deformation takes place when the two parts 7 and 8 of the clamping device 3 are in a clamping position. In this clamping position, the concave part 16, that is the bending die, is moved in the direction of the convex part 15. This pivoting movement of the actuator 18 via a correspondingly formed articulated connection 19. Also in the plastic shaping could here in the

Embodiment carried out swivel movement to be replaced by a linear movement. At the tape head 4 is formed by the coincidence of the two parts 15 and 16, a curvature 22 which faces in the direction of the top of the metal strip. As a result, the tape head 4 is shaped into a shape that is curved upward in the manner of a "ski tip" or "skid". With this "ski shape" or "runner shape" goes the

Threading in a metal treatment plant largely trouble-free and without risk of damage

Equipment parts. The beginning of the tape 4 glides very well on the transport route and compensates for unevenness without impacting it better.

The two parts 15, 16 of the bending tool are each connected by a - not shown in the figures - detachable connection with the parts 7 and 8, so that the

Parts 14, 16 can be easily changed and the curvature can be designed differently depending on the product. ^

List of reference numbers used

1 device

 2 threading table

 3 clamping device

 4 tape head, rolling stock head

 5 metal collar

 6 ramp

 7 first part of the clamping tool

8 second part of the clamping tool

9 arrow

 10 drive device

 11 first axis

 12 joint

 13 first actuator

 14 bending device

 15 convex part of the bending tool

16 concave part of the bending tool

17 gap

 18 actuator

 19 joint

 20 arrow

 21 recess

 22 curvature

Claims

Device for introducing one of Abhaspei- or unwinding unwound metal strip in a metal strip treatment plant, comprising:  a threading table (2),  - A first part (7) of a clamping device (3), which by means of a drive device (10) about a first axis (11) is pivotable and in a resting on the threading table (2) position forms a run-on slope (6) for the unwound metal strip , wherein the position of the tape head (4) can be fixed,  - A second part (8) of the clamping device (3) which is connected to the first part (7) by means of a hinge (12) and by means of a second actuator (13) is pivotable about the accumulated on the ramp (6)  Band head (4) in a clamping position too  clamp,  - A two-part bending tool (14) by means of which in the gap (17) of the  Bending tool (14) projecting part of the  Band head (4) is plastically deformable. Device for introducing one of Abhaspei- or unwinding unwound metal strip in a metal strip treatment plant, comprising:  a threading table (2),  - A first part (7) of a clamping device (3), which by means of a drive device (10) on the threading table (2) so is positionable, that in a resting on the threading table (2) position a run-on slope (6) for the unwound Metal band forms, the position of the tape head (4) can be fixed,  a second part (8) of the clamping device (3) which is connected to the first part (7) by means of a linear guide and is movable relative to the first part (7) by means of a second actuator in order to move on the  Run-up bevel (6) clamped accumulated head (4) in a clamping position,  - A two-part bending tool (14) by means of which in the gap (17) of the  Bending tool (14) projecting part of the  Band head (4) is plastically deformable. Device according to claim 1 or 2, characterized in that the bending tool (14) consists of a convex part (15) and a concave part (16) is formed, wherein the convex part (15) is fixed to the second part (8) and the concave part (16) with the first part (7) is pivotally or slidably connected and at a clamping of the tape head (4) of Gap (17) between the two parts (15, 16) by means of an actuator (18) is changeable. Apparatus according to claim 3, characterized characterized in that the concave part (16) is rotatable on the first part (7) by means of a hinge (19) and the concave part (16) is pivotable in the direction of the convex part (15). Apparatus according to claim 1 or 2, characterized in that the first part (15) and the second part (16) of the bending tool (14) in an axial extent is greater than or equal to the width of the metal strip. Apparatus according to claim 3, characterized characterized in that the convex part (15) and the concave part (16) each have a curvature which is the same size. 7. Apparatus according to claim 6, characterized  characterized in that the curvature is a circular arc. 8. Apparatus according to claim 1 or 2, characterized  characterized in that one or each of the actuators (13, 18) is designed as a hydraulic cylinder. 9. Apparatus according to claim 1 or 2, characterized  characterized in that one or each of the actuators (13, 18) is in each case formed by an electric drive, and that the rotational movement of the electric drive is converted by means of a rolling-element rotary spindle into a linear movement. 10. The device according to claim 1, characterized  in that a recess (21), which is designed to receive the first part (7) of the clamping device (3), is provided on the inlet table (2). 11. A method for introducing a metal strip, in a metal strip treatment plant with the  Steps:  - Feeding the tape head (4) in one on a threading table (2) resting  Clamping device (3), wherein a first part (7) of the clamping device (3) as  Run-on slope (6) acts, and wherein the position of the tape head (4) on the  Run-on slope (6) can be specified; Clamp the metal strip in the predetermined position between the first part (7) and a second part (8) of the clamping device (3) which can be moved towards the first part; plastic shaping of a  Clamping device (3) in a gap (17) of a bending tool (14) projecting part of the  Rolled product head (4). 12. The method according to claim 11, characterized  characterized in that the plastic deformation is carried out between a concave part (16) and a convex part (15), wherein the convex part (15) on the second part (8) of the  Clamping device (3) is fixed and the concave part (16) with the first part (7) of the clamping device (3) is relatively movably connected and wherein the gap (17) between the two parts (15,16) for the purpose of plastic  Shaping is changed by means of an actuator (18). 13. The method according to claim 12, characterized  characterized in that the concave part (16) is rotatable on the first part (7) by means of a hinge (19), and in the plastic shaping of the concave part (16) in the direction of the convex one Part (15) is pivoted. 14. The method according to claim 13, characterized  in that a curvature (22) facing the rolling stock top side is formed on the band head (4) by the plastic shaping. 15. The method according to claim 14, characterized  characterized in that the curvature (22) is continuous, in particular in the form of a circular arc is formed.