Coiling device with asymmetric cooling of the coiled strip

Patent metadata

Field	Value
Publication number	US-10737306-B2
Application number	US-201515552869-A
Country	US
Kind code	B2
Filing date	Dec 16, 2015
Priority date	Feb 27, 2015
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

For a rolled metal strip, in particular a steel strip; a drive roller unit deflects the metal strip from a first transportation direction to a second transportation direction, and the strip is then fed to a coiler. The metal strip is coiled in the coiler to form a coil having a coil diameter. Plastic deformation of an end portion of the metal strip is caused such that the end portion in its uninfluenced state is curved at a curvature radius. The plastic deformation of the end portion ( 8 ) is at least partially caused by an asymmetric impingement with a cooling medium ( 21 ) on the sides of the end portion ( 8 ). The impingement of the end portion ( 8 ) with the cooling medium ( 21 ) is performed across a length of the end portion ( 8 ) that is longer than half the outermost coiling of the coil ( 6 ) but smaller than the outermost coiling of the coil ( 6 ).

First claim

The invention claimed is:

1. A method for coiling a rolled metal strip comprising:
driving the metal strip past a drive roller unit and deflecting the metal strip by the drive roller unit from a first transportation direction to a second transportation direction;
feeding the deflected metal strip to a coiler;
coiling the metal strip in the coiler to form a coil having a coil diameter;
causing a plastic deformation of an end portion of the metal strip such that the end portion in an uninfluenced state thereof is curved at a curvature radius;
at least partially causing the plastic deformation of the end portion by an asymmetric impingement on sides of the end portion with a cooling medium during coiling, prior to coiling, or prior and during the coiling;
wherein an outermost coiling of the formed coil has a length and the end portion has a length longer than half the length of the outermost coiling of the coil and shorter than the length of the outermost coiling of the formed coil.

2. The method as claimed in claim 1 , further comprising performing the asymmetric impingement on the sides of the end portion of the metal strip with the cooling medium at least prior to the coiling of the end portion, at least during the coiling of the end portion, or at least after the coiling of the end portion.

3. The method as claimed in claim 2 , further comprising performing the asymmetric impingement on the sides of the end portion with the cooling medium with at least one of a constant quantity of coolant, a variable quantity of coolant, and in an intermittent manner.

4. The method as claimed in claim 1 , wherein the maximum curvature radius is equal to half the coil diameter.

5. The method as claimed in claim 1 , further comprising supporting the plastic deformation of the end portion by a straightening unit located upstream of the coiler.

6. The method as claimed in claim 5 , further comprising combining a bottom roller and a top roller of the drive roller unit which are on the driven metal strip with addition of a downholding roller which is on the driven metal strip and is located upstream of the drive roller unit;
each of the rollers is capable of being placed on the metal strip for being used as the straightening unit.

7. The method as claimed in claim 6 , further comprising a straightening unit upstream or downstream of the drive roller unit, wherein the upstream or downstream straightening unit comprises at least three sequentially disposed straightening rollers placed in an alternating manner on one and the other side of the metal strip, and at least one of the rollers of the straightening unit is capable of being placed on the metal strip.

8. A coiling installation for coiling a rolled metal strip, comprising:
a drive roller unit that drives the metal strip and deflects the driven metal strip from a first transportation direction to a second transportation direction;
a coiler positioned downstream of the drive roller unit to receive the metal strip fed from the drive roller unit in the second transportation direction and to form a coil with the received metal strip having a selected coil diameter;
a deformation installation that causes a plastic deformation of an end portion of the metal strip such that the end portion in an uninfluenced state thereof is curved at a curvature radius, the deformation installation being a cooling installation that is arranged to impinge asymmetrically a cooling medium on the end portion at a location prior to, during, or prior to and during the coiling;
the cooling installation being arranged to impinge on the end portion with the cooling medium along a length that is longer than half a length of an outermost coiling of the coil and shorter than the length of the outermost coiling of the coil, wherein the cooling installation is positioned to supply the cooling medium upstream of the drive roller unit, positioned to deliver the cooling medium to the formed coil directly, or positioned to supply the cooling medium upstream of the drive roller unit and positioned to deliver the cooling medium to the formed coil directly; and
a straightening unit located upstream of the coiler and configured for supporting the plastic deformation of the end portion.

9. The coiling installation as claimed in claim 8 , wherein the cooling installation, during the passage of the end portion through the cooling installation, supplies the end portion coolant constantly, variably, or intermittently.

10. The coiling installation as claimed in claim 8 , wherein the straightening unit comprises a bottom roller and a top roller of the drive roller unit which are on the driven metal strip and additionally a downholding roller which is on the driven metal strip and upstream of the drive roller unit, wherein at least one of the rollers of the straightening unit is capable of being placed on the metal strip.

11. The coiling installation of claim 8 , further comprising the straightening unit is either upstream or downstream of the drive roller unit, wherein the upstream or downstream straightening unit comprises at least three sequentially disposed straightening rollers placed in an alternating manner on one and the other side of the metal strip, wherein at least one of the rollers of the straightening unit is capable of being placed on the metal strip.

12. A coiling installation for coiling a rolled metal strip, comprising:
a drive roller unit that drives the metal strip and deflects the driven metal strip from a first transportation direction to a second transportation direction;
a coiler positioned downstream of the drive roller unit to receive the metal strip fed from the drive roller unit in the second transportation direction and to form a coil with the received metal strip having a selected coil diameter;
a deformation installation that causes a plastic deformation of an end portion of the metal strip such that the end portion in an uninfluenced state thereof is curved at a curvature radius, the deformation installation being a cooling installation that is arranged to impinge asymmetrically a cooling medium on the end portion at a location prior to, during, or prior to and during the coiling; and
the cooling installation being arranged to impinge on the end portion with the cooling medium along a length that is longer than half a length of an outermost coiling of the coil and shorter than the length of the outermost coiling of the coil, wherein the cooling installation is positioned to supply the cooling medium upstream of the drive roller unit, positioned to deliver the cooling medium to the formed coil directly, or positioned to supply the cooling medium upstream of the drive roller unit and positioned to deliver the cooling medium to the formed coil directly, wherein the maximum curvature radius is equal to half the coil diameter.

Assignees

• Primetals Technologies Austria GmbH

Inventors

• Maierl Josef
• Pichler Lukas
• Seilinger Alois

Classifications

• B21B45/0218

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

• B21C47/04 Primary

  on or in reels or drums, without using a moving guide · CPC title

• B21C47/26

  Special arrangements with regard to simultaneous or subsequent treatment of the material · CPC title

• B21C47/3433

  for guiding the leading end of the material, e.g. from or to a coiler · CPC title