Method and device for stabilizing a movement of a rolled metal band on a roller table

Patent metadata

Field	Value
Publication number	US-10583473-B2
Application number	US-201716303924-A
Country	US
Kind code	B2
Filing date	May 24, 2017
Priority date	May 31, 2016
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

During stabilization of a metal band ( 1 ) on a roller path ( 2 ), the band ( 1 ) is to be only minimally cooled via the stabilisation. A device for that includes multiple protective runners ( 3 ), each oriented in the conveyor direction (R), for guiding the band ( 1 ), wherein the protective runners ( 3 ) are arranged above the roller path ( 2 ) and the protective runners ( 3 ) are at a distance from one another in a width direction (B) of the band ( 1 ). Multiple rows ( 4 ) of nozzles are arranged in the conveyor direction (R) or in the width direction (B) of the band. Each row ( 4 ) of nozzles includes multiple nozzles ( 5 ). The nozzles ( 5 ) are set back in relation to an underside of the protective runners ( 3 ), such that an arched band ( 1 ) cannot come into contact with the nozzles ( 5 ). A compressed air supply ( 6 ) and a network of tubes or pipelines ( 7 ) supply the nozzles ( 5 ) with compressed air, wherein the nozzles ( 5 ) apply compressed air to the upper side of the band ( 1 ) in order to stabilize the movement of the band ( 1 ) on the roller path ( 2 ).

First claim

The invention claimed is:

1. A device for stabilizing a rolled metal band, on a roller table in a hot rolling mill, wherein the band has an upper side and a lower side and the band is moved in a band run direction on the roller table, the device comprising:
a plurality of protective runners, each runner oriented in a band run direction, and configured for guiding the rolled band, wherein the protective runners are arranged above the roller table and the protective runners have a distance between each other in a width direction of the band;
a plurality of nozzle rows arranged in the band run direction or in a width direction of the band, each nozzle row has a plurality of nozzles, the nozzles are set back in relation to an underside of the protective runners so that an upwardly bent band does not contact the nozzles; and
a compressed air supply, and a network of hose lines or pipe lines coupled to the compressed air supply for supplying the nozzles with compressed air; and
the nozzles are oriented and configured to apply compressed air to the upper side of the band for stabilizing the movement of the band on the roller table.

2. The device as claimed in claim 1 , wherein the device has at least three of the protective runners.

3. The device as claimed in one claim 1 , wherein in a nozzle row, at least one of the nozzles is arranged between two of the protective runners.

4. The device as claimed in claim 1 , further comprising a common hose line or pipe line configured for supplying the nozzles of a nozzle row with compressed air.

5. The device as claimed in claim 1 , wherein the device is pivotable toward the band and away from the band, a joint about which the device is pivotable and an articulated drive operable to cause the pivoting of the device.

6. The device as claimed in claim 1 , wherein each of the nozzles is a single-orifice nozzle, a multi-orifice nozzle and/or a round jet nozzle or a flat jet nozzle, or a multi-channel flat jet nozzle.

7. The device as claimed in claim 1 , wherein a plurality of the nozzles have an adjustable orientation in relation to the band.

8. The device as claimed in claim 7 , further comprising an actuator configured and operable to adjust the orientation of one or more of the nozzle rows in relation to the band.

9. The device as claimed in claim 1 , further comprising one or more of the nozzles of a nozzle row is configured to be shut off.

10. The device as claimed in claim 1 , wherein a pressure of the compressed air is adjustable by the compressed air supply and/or by a valve arranged between the compressed air supply and the nozzles.

11. The device as claimed in claim 10 , further comprising a pressure regulator for adjusting the compressed air in a hose line or a pipe line or a flow rate regulator.

12. The device as claimed claim 1 , further comprising at least one compressed air accumulator and a valve installed between the compressed air supply and a hose line or a pipe line, wherein the compressed air accumulator covers consumption peaks and the valve is configured to release and shut off the throughflow of compressed air from the compressed air accumulator.

13. A hot rolling mill with a device as claimed in claim 1 , further comprising shears arranged downstream of a cooling zone, and the device is arranged between the shears, and a winding device for the band or between two of the winding devices.

14. A method for stabilizing a band run of a rolled band, wherein the band run is on a roller table in a hot rolling mill according to claim 13 , wherein the band has thickness of t≤1.2 mm, and the band is moved on the roller table at a speed of ≥5 m/s, the method comprising the steps:
guiding the device onto the upper side of the band;
applying compressed air at a pressure p to the upper side of the band by means of the nozzles of the device, for stabilizing the movement of the band on the roller table;
terminating the application of compressed air; and
guiding the device away from the band.

15. The method as claimed in claim 14 , further comprising before the application of compressed air:
closing a valve arranged between a compressed air accumulator and a nozzle of the device; and
replenishing the compressed air accumulator to a pressure >p.

16. The method as claimed in claim 14 , further comprising during the application of compressed air, at least partially opening a valve, which is arranged between a compressed air accumulator a nozzle of the device, for causing the compressed air to flow to the nozzle.

17. The method as claimed in claim 16 , further comprising adjusting the opening of the valve in a flow rate regulated or pressure regulated manner.

18. The method as claimed in claim 14 , further comprising the guiding of the device is carried out by means of inward pivoting or lowering and/or the guiding away of the device is carried out by pivoting away or lifting.

Assignees

• Primetals Technologies Austria GmbH

Inventors

• Linzer Bernd
• Ostheimer Pascal
• Schiefer Juergen
• Zahedi Michael

Classifications

• B65G21/209

  for augmenting or creating a pression force between the load and the load-carrying surface · CPC title

• B21C47/3466

  by using specific means · CPC title

• B21B39/14

  Guiding, positioning or aligning work (B21B43/12 takes precedence; guides in which work is subjected to permanent internal twisting B21B15/02) · CPC title

• B21B39/12 Primary

  Arrangement or installation of roller tables in relation to a roll stand · CPC title

• B21B45/0218

  for strips, sheets, or plates (B21B45/023, B21B45/0233 take precedence) · CPC title