Roll stand, rolling system and method for actively damping vibrations in a roll stand

Patent metadata

Field	Value
Publication number	US-11123781-B2
Application number	US-201615762199-A
Country	US
Kind code	B2
Filing date	Aug 18, 2016
Priority date	Sep 23, 2015
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

The invention relates to a roll stand (2) for rolling, in particular cold-rolling, metal products, comprising at least one actuator (16) which can be actuated for actively damping vibrations in the roll stand (2), and at least one supporting roll (10) which is non-adjustable or can be adjusted exclusively via a readjusting device for pass line adjustment (13) of the roll stand (2) for supporting a working roll (5) and/or intermediate roll of the roll stand (2), wherein the supporting roll (10) is guided at the ends via a respective bearing unit (11) on a rack (8) of the roll stand (2). In order to enable an optimal active damping of vibrations in a roll stand (2) of this type with low engineering effort, the invention proposes that the supporting roll (10) is supported on the actuator (16) via at least one bearing unit (11) and that the actuator (16) is supported on a section (17) of the rack (8) either directly or indirectly via at least one component (14) of the readjustment device (13).

First claim

The invention claimed is:

1. A roll stand ( 2 ) for cold-rolling metal products, comprising:
a rack for supporting a lower working roll ( 5 ) and an upper working roll ( 4 ),
at least one back-up roll ( 10 ) for supporting the lower working roll ( 5 ),
a readjusting device ( 13 ) positioned on a lower section of the rack beneath the at least one back-up roll for pass-line adjustment and for adjusting a height of the at least one back-up roll ( 10 ),
a working roll adjustment unit mounted at a top section of the rack for selectively forming a gap between the lower and upper working rolls, and
at least one actuator ( 16 ) mounted on the lower section of the rack for damping vibrations of the roll stand ( 2 ), the back-up roll ( 10 ) being supported at opposite ends thereof by respective bearing units ( 11 ) provided on the rack, wherein the back-up roll ( 10 ) is supported on the at least one actuator ( 16 ) by at least one of the bearing units ( 11 ), and wherein the at least one actuator ( 16 ) is supported below the respective bearing unit ( 11 ) directly on the lower section ( 17 ) of the rack ( 8 ) or indirectly on the lower section of the rack by the readjusting device ( 13 ).

2. The roll stand ( 2 ) according to claim 1 , wherein the at least one actuator ( 16 ) is a piezomechanical actuator or a piezohydraulic actuator.

3. The roll stand ( 2 ) according to claim 1 , wherein the at least one actuator ( 16 ) is set up for acquiring rolling forces.

4. The roll stand ( 2 ) according to claim 1 , wherein the at least one actuator includes first and second actuators ( 16 ), wherein the respective bearing units ( 11 ) of the back-up roll ( 10 ) are supported, respectively, on the first and second actuators ( 16 ), and the first and second actuators ( 16 ) are supported on a respective section ( 17 ) of the rack ( 8 ) either directly or indirectly via at least one adjusting wedge ( 14 ) of the readjusting device ( 13 ).

5. The roll stand ( 2 ) according to claim 1 , further comprising at least one vibration sensor ( 18 ) arranged on the rack ( 8 ) for acquiring the vibrations of the roll stand ( 2 ).

6. The roll stand ( 2 ) according to claim 5 , wherein the at least one vibration sensor ( 18 ) is arranged on a section ( 19 ) of the rack ( 8 ) which is arranged opposite the lower section ( 17 ) of the rack ( 8 ).

7. The roll stand ( 2 ) according to claim 5 , wherein the at least one vibration sensor ( 18 ) is set up to acquire vibrations in a frequency range from 0.5 Hz to 2000 Hz.

8. The roll stand ( 2 ) according to claim 5 , wherein the at least one vibration sensor ( 18 ) is an acceleration sensor.

9. A roll stand according to claim 1 , further comprising an intermediate roll, wherein the back-up roll supports the intermediate roll.

10. A roll stand according to claim 1 , wherein the at least one actuator is supported on an adjusting wedge of the readjusting device ( 13 ).

11. A rolling system ( 1 ) for cold rolling metal objects, comprising:
at least one roll stand ( 2 ) and at least one system ( 3 ) for actively damping vibrations in the at least one roll stand, wherein the at least one roll stand ( 2 ) comprises:
a rack having a lower working roll ( 5 ) and an upper working roll,
at least one back-up roll ( 10 ) for supporting the lower working roll ( 5 ),
a readjusting device ( 13 ) positioned on a lower section of the rack beneath the back-up roll for pass-line adjustment and for adjusting height of the at least one back-up roll ( 10 ),
a working roll adjustment unit mounted at a top section of the rack for selectively forming a gap between the lower and upper working rolls,
at least one actuator ( 16 ) for selectively damping vibrations of the roll stand ( 2 ), wherein the back-up roll ( 10 ) is supported at opposite ends thereof by respective bearing units ( 11 ) provided on the rack, the back-up roll ( 10 ) being supported on the at least one actuator ( 16 ) by one of the bearing units ( 11 ), and the at least one actuator ( 16 ) being supported below the respective bearing unit ( 11 ) directly on the lower section ( 17 ) of the rack ( 8 ) or indirectly by at least one component ( 14 ) of the readjusting device ( 13 ),
at least one vibration sensor arranged on the rack ( 8 ) for acquiring the vibrations of the roll stand ( 2 ), and

the at least one system ( 3 ) comprising at least one electronic controller in electronic communication with the at least one vibration sensor ( 18 ) and with to the at least one actuator ( 16 ), wherein vibration signals generated by the at least one vibration sensor ( 18 ) are evaluated for generation of control signals, and the at least one electronic controller selectively transmits the control signals to actuate the at least one actuator ( 16 ) for introduction of counter-vibrations into the roll stand ( 2 ).

12. The rolling system ( 1 ) according to claim 11 , wherein the at least one electronic controller ( 20 ) which is of modular construction is set up for online monitoring of the vibrations of the roll stand ( 2 ), for online visualization of vibration levels of the vibrations of the roll stand ( 2 ), for the automatic start-up of at least one low-vibration rolling speed, and/or for the automatic reduction of an instantaneous rolling speed as a function of the instantaneously acquired vibrations of the roll stand ( 2 ).

13. The rolling system ( 1 ) according to claim 11 , wherein the at least one electronic controller ( 20 ) is set up to determine frequencies, amplitudes and/or phase positions of the counter-vibrations to be generated.

14. The rolling system ( 1 ) according to claim 11 , wherein the electronic controller ( 20 ) is set up to generate control signals taking into consideration a transmission behavior of the at least one vibration sensor ( 18 ), of the at least one actuator ( 16 ) and/or of the roll stand ( 2 ).

15. The rolling system ( 1 ) according to claim 11 , wherein the at least one electronic controller ( 20 ) is set up to react to temporal changes of characteristics of the at least one actuator ( 16 ) and/or of a controlled system used.

16. A roll stand according to claim 11 , wherein the at least one component ( 14 ) of the readjusting device ( 13 ) includes an adjusting wedge.

17. A method for actively damping vibrations in a roll stand ( 2 ) for cold-rolling a metal product, wherein the vibrations in the roll stand ( 2 ) are acquired, and counter-vibrations counteracting the vibrations are generated, the method comprising:
supporting a lower back-up roll on at least one actuator ( 16 ) via at least one bearing unit ( 11 ) which supports the lower back-up roll on a rack ( 8 ) of the roll stand ( 2 ), wherein the at least one actuator ( 16 ) is supported directly on a lower section ( 17 ) of the rack ( 8 ) or indirectly on the lower section of the rack via a readjusting device ( 13 );
adjusting a height of the lower back-up roll exclusively with the readjusting device for pass line adjustment of the roll stand ( 2 );
initiating the cold-rolling of the metal product;
generating the counter-vibrations of at least one actuator ( 16 ), and
introducing the counter-vibrations into the lower back-up roll ( 10 ) for supporting a work roll ( 5 ) and/or an intermediate roll of the roll stand ( 2 ).

18. The method according to claim 17 , wherein the at least one actuator ( 16 ) is used for the acquisition of rolling forces.

Assignees

• Sms Group Gmbh

Inventors

• Krueger Matthias
• Richard sebastian
• Rues Karsten
• Breuer Michael

Classifications

• B21B38/008

  Monitoring or detecting vibration, chatter or chatter marks · CPC title

• B21B37/007

  Control for preventing or reducing vibration, chatter or chatter marks (B21B37/66 takes precedence) · CPC title

• B21B2013/025

  Quarto, four-high stands · CPC title

• B21B13/02 Primary

  with axes of rolls arranged horizontally · CPC title

• B21B2203/44

  Vibration dampers · CPC title