EP2346626B1 - Device and method for lateral guidance of a rolled strip transported on a roller bed - Google Patents

Description

The invention relates to a device for the lateral guidance of a rolled strip transported on a roller conveyor, preferably a hot strip in front of a winding device, provided on both sides of the rolled strip parallel first and second side guides which are displaceable by independently adjustable adjusting means to each other or away from each other.

Hot strip reels are arranged at the end of hot strip mills and have the function to wind hot strip after rolling into coils. The tape is wound up under tension in order to produce a sufficiently tightly wound and edged straight band and to avoid cracking of the collar after the finish winding.

During winding, under certain circumstances, the strip may periodically run sideways. The amplitude can decay, remain constant during the entire winding or grow. Especially with high-strength grades or low coiling temperatures, the periodic bleeding is observed. The triggers for the beginning of the vibrations are mainly unplanations or so-called "sabers" on the tape head, occurring during the winding train loss or other disturbances in the course of the winding process.

Due to the periodic bleeding the winding quality is deteriorated. The tape is not wound straight edge, it comes to loose turns and in extreme cases to instability and to stop the winding process. During the periodic course, the rolled strip travels sinusoidally on the collar, in the driver and between the side guides. It can on the waistband amplitudes of 50 mm and more can be achieved. There are high forces in the side guides, which can lead to edge damage and buckling of the band edge.

From the pamphlets GB 2,276,108 A and DE 41 40 784 A1 Devices and methods are known which serve to adjust side guides of a metal strip which is transported on a roller table.

From the DE 40 03 717 A1 is a side guide for transported on a roller conveyor rolled strip, preferably hot strip in front of a reel known. There are on both sides of the rolled strip towards each other or away from each other slidable guide rulers or side guides provided which are coarsely prepositioned in a first step and in a second step to the rolled strip can be pressed. For this purpose, hydraulic cylinders are used, which are able to apply the required contact pressure in the second step. The hydraulic cylinders cause the displacement of the guide rulers both during the first and during the second step. For the control of the hydraulic cylinder, a control device is provided which advance the guide rulers from a retracted starting position to a predeterminable position during the first step via the hydraulic cylinders arranged downstream of them as actuators. During the second step, at least one of the hydraulic cylinders is both positionally and force-controlled.

Also from the WO 2002 030587 A1 a device for guiding a metal strip to a reel is known in which lateral guide rulers are used. In the direction of the metal strip a first and a second guide rule are provided on both sides. The positions of the second guide rulers with respect to the metal strip are controlled by position controllers independently of the positions of the first guide rulers.

Out JP 2001-047120 A are a generic device according to the preamble of claim 1 and a corresponding method according to the preamble of claim 7 known.

It is the object of the invention to provide an improved apparatus for laterally guiding a rolled strip transported on a roller table.

According to the invention, this object is achieved in a device of the type mentioned above in that a control device for damping the periodic running of the rolled strip is provided, which can be supplied as input variables in the management of the rolled strip acting forces and / or positions of the guide rulers and / or the rolled strip and that the control device, based on the measured input variables, regulates the positions of the guide rulers and / or forces exerting the side guides on the rolled strip. Furthermore, the control device comprises a controller, to which the forces exerted by the two guide rulers on the rolled strip, can be supplied, and generates from these forces each path signals for the two guide rulers.

The essence of the invention is that a device for damping and avoiding the lateral running of the metal strip is provided. This stabilizes the winding process. As a control system, the side guides or guide rulers are used in the area in front of the winding reel in known catfish. The side guides can be adjusted vertically with respect to the winding tape to adjust their positions to the width of the respective tape to be wound.

Advantageous developments of the invention will become apparent from the dependent claims.

Advantageously, a differential force is obtained from the respective forces acting on the two guide rulers and then fed to the control device.

In an advantageous embodiment of the device, the control device is supplied with the forces of the driver setting on the rolled strip and / or the positions of the driver setting on the rolled strip as input variables.

In addition, it can advantageously be provided that the control device is supplied with the measured strip center position of the rolled strip and / or a measured differential pull of the rolled strip, in particular in the region of the reel, as input variables.

In addition, it is advantageous if the controller for the two sides of the rolled strip, a first or a second position controller are arranged, wherein the first position controller, the sum of the path signal generated by the controller and the difference between the position setpoint and the actual position of the first guide ruler and the second position controller, the difference from the path signal generated by the controller and the difference between the position setpoint and the actual position value of the second guide rule is fed.

Preferably, the two position controllers respectively generate valve setpoints for hydraulic cylinders for actuating the guide signals or side guides.

The invention also relates to a method for laterally guiding a rolled strip transported on a roller table, preferably a hot strip in front of a winding device, with parallel first and second side guides provided on both sides of the rolled strip which are displaced towards or away from each other by adjusting means which are independently adjustable.

Fig. 1

eine Draufsicht auf die Vorderseite eines Metallbandhaspels mit einer einen Seitenführungsbereich umfassenden Einrichtung zur Zuführung eines Metallbandes zu einer Wickelvorrichtung,

Fig. 2

einen schematisch dargestellten Querschnitt entlang einer Schnittlinie A - A aus Fig. 1 durch die mit dem Metallband bewickelte Wickelvorrichtung, wobei das seitliche Verlaufen des Metallbandes während des Wickelvorgangs periodisch und abklingend ist,

Fig. 3

einen schematisch dargestellten Querschnitt entlang einer Schnittlinie A - A aus Fig. 1 durch die mit dem Metallband bewickelte Wickelvorrichtung, wobei das seitliche Verlaufen des Metallbandes während des Wickelvorgangs periodisch und kontinuierlich ist,

Fig. 4

einen schematisch dargestellten Querschnitt entlang einer Schnittlinie A - A aus Fig. 1 durch die mit dem Metallband bewickelte Wickelvorrichtung, wobei das seitliche Verlaufen des Warmbandes während des Wickelvorgangs periodisch und zunehmend ist,

Fig. 5

eine Draufsicht auf die Oberseite des Seitenführungsbereichs gemäß Fig. 1 mit hydraulisch verstellbaren Seitenführungselementen und

Fig. 6

ein Ausführungsbeispiel für eine Regelung zur Dämpfung des periodischen Verlaufens.

According to the invention, the method is characterized in that a control device damps the periodic running of the rolled strip, wherein the control device as input variables in the leadership of the rolled strip acting forces and / or positions of the side guides and / or the rolled strip are supplied and the control device due to the measured input variables Positions of the side guides and / or forces that exert the side guides on the rolled strip. The invention will be explained in more detail in an embodiment. Show it:

Fig. 1

4 is a plan view of the front side of a metal strip reel with a device comprising a side guide area for feeding a metal strip to a winding device;

Fig. 2

a schematically illustrated cross section along a section line A - A from Fig. 1 by the winding device wound with the metal strip, wherein the lateral running of the metal strip is periodic and fading during the winding process,

Fig. 3

a schematically illustrated cross section along a section line A - A from Fig. 1 by the winding device wound with the metal strip, wherein the lateral running of the metal strip during the winding process is periodic and continuous,

Fig. 4

a schematically illustrated cross section along a section line A - A from Fig. 1 by the winding device wound with the metal strip, wherein the lateral running of the hot strip during the winding process is periodic and increasing,

Fig. 5

a plan view of the top of the side guide portion according to Fig. 1 with hydraulically adjustable side guide elements and

Fig. 6

an embodiment of a control for damping the periodic bleeding.

A metal tape reel 1 ( Fig. 1 ) serves to wind a metal strip 2, in particular a hot strip, by means of a winding device 3, on which the metal strip 2 in the form of a collar 4 is to be wound onto a dome 5. The metal strip 2 is guided over a side guide region 6, pulled by a driver comprising a driver lower roller 7 and a driver upper roller 8, and finally wound on the winding device 3.

During the winding process, under certain circumstances, a periodic lateral running of the rolled strip 2 may occur, ie the metal strip 2 is not wound centrally and edgewise on the winding mandrel 5 of the winding device 3, but deviates laterally from the middle position. For example, periodic deviations from the mean position on the winding mandrel 5 occur. In this case, the amplitude of the lateral offset of the metal strip 2 can decay relative to the desired middle position during the winding process (FIG. Fig. 2 ), remain constant during the entire winding process ( Fig. 3 ) or during the winding process ( Fig. 4 ).

According to the invention, the metal strip reel 1 in the side guide region 6 (FIG. Fig. 5 ) on both sides, ie on the operating side as on the drive side, hydraulically operated Anstellzylinder 9, 10 to adjust side guides 11, 12 according to the desired position of the metal strip 2, wherein the Anstellzylinder 9 on the operating side and the Anstellzylinder 10 on the Drive side is arranged. The metal strip 2 passes over rollers 13 in this area.

F_SBS

Kraft der Seitenführung 11 auf der Bedienseite auf die Seitenkante des Metallbandes 2,

F_SAS

Kraft der Seitenführung 12 auf der Antriebsseite auf die Seitenkante des Metallbandes 2,

Δs_D

Differenzposition als Zusatzsollwert,

S_BSREF

Positionssollwert der Seitenführung 11 auf der Bedienseite,

S_BSACT

Positionsistwert der Seitenführung 11 auf der Bedienseite,

S_ASREF

Positionssollwert der Seitenführung 12 auf der Antriebsseite,

S_ASACT

Positionsistwert der Seitenführung 12 auf der Antriebsseite,

y_VAS

Ventilsollwert eines Ventils des Anstellzylinders 9 auf der Bedienseite und

y_VBS

Ventilsollwert eines Ventils des Anstellzylinders 10 auf der Betriebsseite.

According to the invention, the following variables are included in the control process:

F _SBS

Force of the side guide 11 on the operating side on the side edge of the metal strip 2,

F _SAS

Force of the side guide 12 on the drive side on the side edge of the metal strip 2,

Δs _D

Difference position as additional setpoint,

S _BSREF

Position setpoint of the side guide 11 on the operating side,

S _BSACT

Position actual value of the side guide 11 on the operating side,

S _ASREF

Position setpoint of the lateral guide 12 on the drive side,

S _ASACT

Position actual value of the side guide 12 on the drive side,

y _VAS

Valve setpoint of a valve of the adjusting cylinder 9 on the operating side and

y _VBS

Valve setpoint of a valve of Anstellzylinders 10 on the operating side.

A controller 14 ( Fig. 6 ), the two force values F _{SBS of} the side guide 11 on the operating side and F _{SAS of} the side guide 12 on the drive side are supplied as input values. The controller 14 obtains from the difference a position value, namely the difference position Δs _D. On the other hand, from the difference between the position _{command value} S _{ASREF of} the side guide 12 and the position _{actual value} S _{ASACT of} the side guide 12, a first position value is obtained, which is summed with the value Δs _D and fed to a position controller 15 for the drive side, which generates the valve target value y _VAS therefrom to actuate the adjusting cylinder 9.

On the other hand, the value Δs _D obtained by the controller 14 is subtracted from a second position value generated from the difference between the position _{command value} S _{BSREF of} the side guide 11 and the _actual position _value S _{BSACT of} the side guide 11. The value generated by the subtraction of the value .DELTA.s _D is supplied to an operating position controller 16, which generates therefrom the valve setpoint Y _{BAS in} order to actuate the setting cylinder 10. In this way, an individual regulation of the positions of the two adjusting cylinders 9, 10 is made possible.

LIST OF REFERENCE NUMBERS

1

Metal strip coiler

2

metal band

3

winder

4

Federation

5

mandrel

6

Side guide region

7

Drivers sub role

8th

Driver top roll

9

Adjusting cylinder

10

Adjusting cylinder

11

cornering

12

cornering

13

roll

14

regulator

15

position controller

16

position controller

Claims (7)

1. Device for lateral guidance of a rolled strip (2) transported on a roller path, preferably a hot strip upstream of a coiling device (3), with parallel first and second lateral guides (11, 12), which are provided on either side of the rolled strip (2) and which are displaceable towards or away from one another by adjusting means (9, 10) adjustable independently of one another,
   wherein a regulating device (14, 15, 16) for damping the periodic eccentric running of the rolled strip (2) is provided, to which positions of the lateral guides (11, 12) and/or of the rolled strip (2) effective during guidance of the rolled strip (2) can be fed as input variables, and that the regulating device (14, 15, 16) regulates the positions of the lateral guides (11, 12) on the basis of the measured input variables,
   characterised in that forces of the lateral guides (11, 12) acting during the guidance of the rolled strip (2) are fed to the regulating device (14, 15, 16) as input variables, wherein the regulating device (14, 15, 16) on the basis of the measured input variables regulates the forces which the lateral guides (11, 12) exert on the rolled strip (2) and
   the regulating device (14, 15, 16) comprises a regulator (14), to which the forces exerted by the two lateral guides on the rolled strip (2) can be fed and which generates therefrom respective travel signals for the two lateral guides (11, 12).
2. Device (1) according to claim 1, characterised in that first and second position regulators (15, 16) are arranged downstream of the regulator (14) respectively for the two sides of the rolled strip, wherein the sum of the travel signal generated by the regulator (14) and the difference between the position target value and the position actual value of the first lateral guide (12) can be fed to the first position regulator (15) and the difference of the travel signal generated by the regulator (14) and the difference between the position target value and the position actual value of the second lateral guide (11) can be fed to the second position regulator (16).
3. Device according to claim 1 or 2, characterised in that a difference force (F_SAS-F_SBS) obtained from the forces respectively acting on the two lateral guides (11, 12) can be fed to the regulating device (14, 15, 16).
4. Device (1) according to any one of claims 1 or 3, characterised in that the forces of adjustment of a driver (7, 8) on the rolled strip (2) and/or the positions of the adjustment of the driver (7, 8) at the rolled strip (2) can be fed to the regulating device (14, 15, 16) as input variables.
5. Device (1) according to any one of claims 1 to 4, characterised in that the measured strip centre position of the rolled strip (2) and/or a measured difference tension of the rolled strip (2), particularly in the region of the coiler, can be fed to the regulating device (14, 15, 16) as input variables.
6. Device (1) according to any one of claims 2 to 5, characterised in that the two position regulators (15, 16) generate respective valve target values for hydraulic cylinders (9, 10) for actuation of the lateral guides (11, 12).
7. Method for lateral guidance of a rolled strip (2) transported on a roller path, preferably a hot strip upstream of a coiling device (3), with parallel first and second lateral guides (11, 12), which are provided on either side of the rolled strip (2) and which are displaced towards or away from one another by adjusting means (9, 10) adjustable independently of one another,
   wherein a regulating device (14, 15, 16) damps the periodic eccentric running of the rolled strip (2), wherein positions of the lateral guides (11, 12) and/or of the rolled strip (2) effective during guidance of the rolled strip (2) are fed to the regulating device as input variables and the regulating device (14, 15, 16) regulates the positions of the lateral guides (11, 12) on the basis of the measured input variables,
   characterised in that forces of the lateral guides (11, 12) acting during the guidance of the rolled strip (2) are fed to the regulating device (14, 15, 16) as input variables, and the regulating device (14, 15, 16) on the basis of the measured input variables regulates the forces which the lateral guides (11, 12) exert on the rolled strip (2) and
   the regulating device (14, 15, 16) comprises a regulator (14), to which the forces exerted by the two lateral guides on the rolled strip (2) are fed and which generates therefrom respective travel signals for the two lateral guides (11, 12).

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