Method and device for structurally conditioning a roll

Patent metadata

Field	Value
Publication number	US-11110564-B2
Application number	US-201715614178-A
Country	US
Kind code	B2
Filing date	Jun 5, 2017
Priority date	Jun 7, 2016
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

The object of providing a method for conditioning a working roll with which the material properties of a working roll can be set in a process-reliable and uniform manner is achieved by a method in which a roll and at least one pressure tool are rotated relative to each other, in which pressure is applied locally to the roll by means of the at least one pressure tool, comprising at least one pressure element, via the at least one pressure element, and in which a deep rolling process is carried out.

First claim

The invention claimed is:

1. A method for structurally conditioning a roll body of a working roll of a roll stand, comprising the following steps,
rotating said roll body of said working roll relative to at least one pressure tool, wherein said pressure tool comprises at least one pressure element,
applying a pressure locally to said roll body of said working roll by means of said at least one pressure tool via said at least one pressure element, and
moving said at least one pressure tool relative to said roll body of said working roll with a feed motion in the axial direction of said roll body of the working roll such that said pressure is applied to at least one surface section of the roll via the at least one pressure element,
whereby a deep rolling process of said roll body of said working roll is carried out.

2. The method according to claim 1 , further comprising the step of conditioning said working roll of the roll stand to be suitable for hot or cold rolling of metal strips or foils from aluminium or an aluminium alloy.

3. The method according to claim 1 , further comprising a step of carrying out a surface-removing process on the roll body of said working roll after carrying out the deep rolling of said roll body of said working roll.

4. The method according to claim 1 , wherein said pressure element comprises a rotatable ball or a rotatable cylindrical roller.

5. The method according to claim 4 , wherein the rotatable ball or the rotatable cylinder has a diameter of 3 mm to 30 mm.

6. The method according to claim 4 , wherein the diameter of the ball or the roller is from 3 mm to 16 mm.

7. The method according to claim 4 , wherein the diameter of the ball or the roller is from 6 mm to 13 mm.

8. The method according to claim 1 , further comprising the step of applying said pressure to the pressure element with at least 100 bar.

9. The method according to claim 1 , wherein the feed motion of the pressure element is 0.01 mm/revolution to 4 mm/revolution of the working roll.

10. The method according to claim 1 , wherein a Leeb hardness of the surface is increased at least 10 HLE in a processed section of the roll.

11. The method according to claim 1 , wherein the feed motion of the pressure element is 0.1 mm/revolution to 0.4 mm/revolution of the working roll.

12. A device for structurally conditioning a roll body of a working roll of a roll stand by carrying out a method according to claim 1 , comprising:
a pressure tool,
wherein said working roll is rotated relative to said pressure tool,
said pressure tool comprises at least one pressure element, said at least one pressure element is suitable to apply a pressure locally on said roll body of said working roll, wherein the pressure tool comprises a deep rolling tool to carry out a deep rolling process to said roll body of said working roll; and
wherein the pressure tool is configured to move relative to the working roll in an axial direction of the working roll.

13. The device according to claim 12 , further comprising a surface removal tool configured to remove at least a portion of the surface of the working roll.

14. The device according to claim 12 , wherein said at least one pressure element comprises at least one rotatable ball or at least one rotatable cylindrical roller to which pressure can be applied.

15. The device according to claim 12 , wherein a pressure source is provided with which pressure of at least 100 bar can be applied to the at least one pressure element.

16. A working roll of a roll stand for hot or cold rolling metal strips, wherein the working roll comprises a roll body which has been treated using a method according to claim 1 , wherein a conditioned surface section comprises a Leeb hardness of the surface of the roll body of the working roll with a standard deviation of 15 HLE.

17. The working roll according to claim 16 , wherein the working roll is designed as a working roll for rolling foils or strips made from aluminium or an aluminium alloy.

18. A working roll of a roll stand for hot or cold rolling metal strips, wherein the working roll comprises a roll body which has been treated using a method according to claim 1 , wherein a conditioned surface section comprises a Leeb hardness of the surface of the roll body of the working roll with a maximum standard deviation of 7.5 HLE.

Assignees

• Draese Stephan
• Holtz Jan Hendrik
• Hydro Aluminium Rolled Prod

Inventors

• Draese Stephan
• Holtz Jan Hendrik

Classifications

• B21B27/005

  Rolls with a roughened or textured surface; Methods for making same · CPC title

• B24B39/045 Primary

  the working tool being composed of a plurality of working rolls or balls · CPC title

• B21B28/02

  Maintaining rolls in effective condition, e.g. reconditioning · CPC title

• B21B27/021

  Rolls for sheets or strips · CPC title

• B21B2267/26

  Hardness of the roll surface · CPC title