Tension and guidance device, and method of rolling strip material

Patent metadata

Field	Value
Publication number	US-9776226-B2
Application number	US-201214236774-A
Country	US
Kind code	B2
Filing date	Jul 26, 2012
Priority date	Aug 8, 2011
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

A rolling system, particularly a cold-rolling system for cold-rolling a metal strip ( 2 ): having at least one cold-rolling stand ( 1 ) an unwinding device ( 3 ) upstream of the cold-rolling stand ( 1 ), a unit ( 10 ) connected between the unwinding device ( 3 ) and the cold-rolling stand ( 1 ), including at least three rolls ( 6, 7, 8 ) each rotationally driven about a rotational axis ( 6 A, 7 A, 8 A). Each roll ( 6, 7, 8 ) can be adjusted individually or together in the direction of the respective rotational axis ( 6 A, 7 A, 8 A) and in a direction transverse to the rotational axis ( 6 A, 7 A, 8 A) by a driving and adjusting device ( 11 ).

First claim

The invention claimed is:

1. A cold-rolling mill for cold-rolling of a metal strip, the mill comprising: at least one cold-rolling stand,
a decoiler positioned upstream of the cold-rolling stand, and
a unit in-line between the decoiler and the cold-rolling stand, the unit is comprised of at least three rollers, each of said at least three rollers of said unit is rotationally driven about a respective axis of rotation; and
a drive and positioning facility that controls the driven rotation and the spatial positioning of said at least three rollers of said unit and the decoiler,
said drive and positioning facility configured for repositioning, during cold rolling of the metal strip, each of said at least three rollers of said unit in the direction along each of said respective axis of rotation of each of said at least three rollers of said unit and in a direction transverse to said each respective axis of rotation,
wherein each of said at least three rollers of said unit is configured to be repositioned with the drive and positioning facility in the direction along said each respective axis of rotation and in the direction transverse to said each respective axis of rotation.

2. The rolling mill as claimed in claim 1 , wherein the axis of rotation of a first one of the rollers which is located closer to the decoiler and the axis of rotation of a third one of the rollers which is located closer to the cold-rolling stand lie in a first plane and a second one of the rollers is a central roller arranged between the first and third rollers, wherein the central roller is repositionable to be spatially positioned relative to the first plane, and the central roller is so positioned by the drive and positioning facility.

3. The rolling mill as claimed in claim 2 , wherein the central roller is repositionable between an out-of-line position, in which the central roller is not engaged with the rolling strip, and an in-line position, in which a circumferential surface of the central roller is partially wrapped around by the rolling strip.

4. The rolling mill as claimed in claim 3 , wherein in the in-line position of the central roller, a wrap-around of the strip on the central roller is arranged beneath the first plane, and a wrap-around of the strip on the first and third rollers is arranged above the first plane.

5. The rolling mill as claimed in claim 4 , wherein in the in-line position of the central roller, the wrap-around of the strip on the central roller is greater than 180°.

6. The rolling mill as claimed in claim 5 , wherein a distance between the respective axes of rotation of the first and third rollers in the first plane can be adjusted, and the drive and positioning facility is configured and operable for adjusting the distance between the axes of the first and third rollers.

7. The rolling mill as claimed in claims 1 , wherein when the central roller is being repositioned, the direction of movement of the central roller is at an angle to a first plane.

8. The rolling mill as claimed in claim 1 , wherein the drive and positioning facility is operable to reposition the decoiler, together with or separately from the rollers, in the direction of the axes of rotation of the rollers.

9. The rolling mill as claimed in claim 1 , further comprising a measurement device configured for detecting the position of the strip and arranged between the unit and the cold-rolling stand; and the measurement device has a signaling link with the drive and positioning facility.

10. A method of cold-rolling of a metal strip with a rolling mill, the mill comprising at least one cold-rolling stand through which the metal strip is advanced, a decoiler positioned upstream of the cold-rolling stand,
a unit configured for influencing the path of the cold-rolled strip is located in-line between the decoiler and the cold-rolling stand, and is comprised of three rollers each driven about a respective axis of rotation, and a drive and positioning facility that controls the driven rotation and the spatial positioning of said three rollers of said unit and the decoiler, the method comprising: selectively repositioning each of said three rollers of said unit during the cold-rolling operation, by means of said drive and positioning facility, both in a direction along each said respective axis of rotation of each of said three rollers of said unit and in a direction transverse to each said respective axis of rotation of each of said three rollers of said unit.

11. The method as claimed in claim 10 , further comprising selectively repositioning the axis of rotation of a first one of the rollers located closest to the decoiler and the axis of rotation of a third one of the rollers located closest to the cold-rolling stand to lie in a plane and selectively repositioning the central roller that is between the first and the third rollers in the direction of advance of the strip path to be positioned relative to the plane.

12. The method as claimed in claim 10 , further comprising repositioning the central roller between an out-of-line position, in which the central roller is not engaged with the rolling strip, and an in-line position, in which the rolling strip is partially wrapped around a circumferential surface of the central roller.

13. The method as claimed in claim 12 , wherein by repositioning the central roller in the in-line position thereof, a wrap-around of the strip on the central roller is arranged beneath the plane, and wrap-around of the strip on the first and third rollers lies above the plane.

14. The method as claimed in claim 13 , wherein in the in-line position of the central roller the rolling strip wraps around the central roller over an angle greater than 180°.

15. The method as claimed in claim 14 , further comprising adjusting the distance between the axes of rotation of the first and third rollers in the plane is by means of a drive and positioning facility.

16. The method as claimed in claim 15 , further comprising adjusting a direction of movement of the central roller when the central roller is being engaged is effected at an angle to the plane.

17. The method as claimed in claim 16 , further comprising: adjusting the decoiler together with or separately from the rollers, in the direction of the axes of rotation of the rollers by means of a drive and positioning facility.

18. The method as claimed in claim 17 , further comprising detecting a position of the strip between the unit and the cold-rolling stand, and submitting a measurement signal for the position of the strip to be transmitted over a signaling link to a drive and positioning facility for the decoiler and the rollers.

19. The method as claimed in claim 10 , further comprising initially feeding the metal strip using a two-part transfer table for the strip, by arranging a first part of the table which is upstream from the rollers to be located beside the decoiler and by arranging a second part of the table between a first one of the rollers and a third one of the rollers in a direction of advancing of the strip.

20. The method as claimed in claim 19 further comprising positioning the transfer table in-line; and
during an initial feeding-in of the strip, moving a pinch roller towards the transfer table which has been positioned in-line.

21. The method as claimed in claim 10 , wherein the rollers and the decoiler are positioned by means of a drive and positioning facility.

22. A cold-rolling mill for cold-rolling of a metal strip, the mill compr

Assignees

• Karner Günter
• Krimpelstätter Konrad
• Primetals Technologies Austria GmbH

Inventors

• Karner Günter
• Krimpelstätter Konrad

Classifications

• B21B37/48

  Tension control; Compression control · CPC title

• B21B38/00

  Methods or devices for measuring, {detecting or monitoring} specially adapted for metal-rolling mills, e.g. position detection, inspection of the product {(control devices or methods B21B37/00)} · CPC title

• B21B37/50

  by looper control · CPC title

• B21B39/084

  Looper devices · CPC title

• B21B39/008

  Rollers for roller conveyors (roller-ways in general B65G13/00, B21B39/00) · CPC title