Rolling of a rolled material

Patent metadata

Field	Value
Publication number	US-11529660-B2
Application number	US-202017607514-A
Country	US
Kind code	B2
Filing date	Apr 23, 2020
Priority date	Apr 30, 2019
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

The invention relates to a method and a rolling device for rolling a rolled material. The rolled material is guided through a roll gap between two working rollers of a reversing roll stand, alternatingly in two opposing rolling directions. A lubricant for lubricating a contact zone is introduced into the contact zone in which the rolled material is in contact with the working rollers, and a coolant is applied to the rolled material and/or the working rollers. In a mixture with a carrier gas, the lubricant is sprayed onto the working rollers and/or onto the rolled material exclusively on an outlet side of a pass. The coolant is applied to the working rollers and/or to the rolled material exclusively on an inlet side of a pass.

First claim

The invention claimed is:

1. A method for rolling a rolled material, comprising:
guiding the rolled material alternatingly in two mutually opposite rolling directions through a roll gap between two working rollers of a reversing roll stand;
introducing a lubricant for lubricating the two working rollers;
applying a coolant to at least one of the two working rollers and the rolled material;
wherein the lubricant is dispensed in a mixture with a carrier gas,
wherein the mixture is sprayed onto the two working rollers exclusively on a run-out side of a rolling pass, the run-out side being where the rolled material runs out of the roll gap; and
wherein the coolant is dispensed onto the at least one of the two working rollers and the rolled material exclusively on a run-in side of the rolling pass, the run-in side being where the rolled material runs into the roll gap.

2. The method as claimed in claim 1 , wherein the lubricant is a lubricating oil.

3. The method as claimed in claim 1 , wherein water is used as the coolant.

4. The method as claimed in claim 1 , wherein a cooling emulsion is used as the coolant.

5. The method as claimed in claim 4 , wherein the coolant contains at least one emulsifier, which improves the adhesion of the lubricant to at least one of the two working rollers and the rolled material.

6. The method as claimed in claim 1 , wherein the mixture of the lubricant and the carrier gas is sprayed the rolled material when the rolled material is being guided through the roll gap in both rolling directions.

7. A method for rolling a rolled material, comprising:
guiding the rolled material alternatingly in a first and a second rolling direction through a roll gap between two working rollers of a reversing roll stand, the first rolling direction being opposite to the second rolling direction;
introducing a lubricant for lubricating a contact zone into the contact zone in which the rolled material bears against the working rollers;
applying a coolant to at least one of the working rollers and the rolled material;
wherein the lubricant is dispensed in a mixture with a carrier gas,
wherein the mixture is sprayed onto at least one of the working rollers and the rolled material exclusively on a run-out side of a rolling pass, the run-out side being where the rolled material runs out of the roll gap;
wherein the coolant is dispensed onto the at least one of the working rollers and the rolled material exclusively on a run-in side of the rolling pass, the run-in side being where the rolled material runs into the roll gap;
wherein the mixture of the lubricant and the carrier gas is sprayed onto at least one of the working rollers and the rolled material when the rolled material is being guided through the roll gap in the first rolling direction; and
wherein the mixture of the lubricant and the carrier gas is not sprayed onto at least one of the working rollers and the rolled material when the rolled material is being guided through the roll gap in the second rolling direction.

8. A method for rolling a rolled material, comprising:
guiding the rolled material alternatingly in two mutually opposite rolling directions through a roll gap between two working rollers of a reversing roll stand;
introducing a lubricant for lubricating a contact zone into the contact zone in which the rolled material bears against the two working rollers;
applying a coolant to at least one of the two working rollers and the rolled material;
wherein the lubricant is dispensed in a mixture with a carrier gas,
wherein the mixture is sprayed onto at least one of the two working rollers and the rolled material exclusively on a run-out side of a rolling pass, the run-out side being where the rolled material runs out of the roll gap;
wherein the coolant is dispensed onto the at least one of the two working rollers and the rolled material exclusively on a run-in side of the rolling pass, the run-in side being where the rolled material runs into the roll gap; and
wherein, when the rolled material is being guided through the roll gap for a first time, a rolled material head of the rolled material, which is a first region of the rolled material to be guided through the roll gap, is guided through the roll gap at a slower speed than the remaining region of the rolled material.

9. The method as claimed in claim 8 , wherein, when the rolled material head is being guided through the roll gap for the first time, no coolant is dispensed onto the at least one of the two working rollers and onto the rolled material.

10. A rolling apparatus for rolling a rolled material, the rolling apparatus comprising:
a reversing roll stand with two working rollers;
at least one spraying bar on each side of the rolling stand configured to spray the mixture of the lubricant and the carrier gas onto the two working rollers;
at least one cooling bar configured to dispense the coolant onto at least one of the two working rollers and onto the rolled material; and
a controller is configured to control each spraying bar so that the mixture of the lubricant and the carrier gas is dispensed exclusively on the run-out side of the rolling pass;
wherein the controller is configured to control each cooling bar so that the coolant is dispensed exclusively on the run-in side of the rolling pass.

11. The rolling apparatus as claimed in claim 10 , wherein all the spraying bars are arranged on a same side of the reversing roll stand.

12. The rolling apparatus as claimed in claim 10 , wherein the at least one spraying bar and the at least one cooling bar are arranged on at least one side of the reversing roll stand.

13. The rolling apparatus as claimed in claim 10 , wherein:
the at least one spraying bar is at least two spraying bars; and
on at least one side of the reversing roll stand, a first one of the at least one spraying bars is arranged above a rolled material plane, in which the rolled material is guided, and a second one of the at least one spraying bars is arranged below the rolled material plane.

14. The rolling apparatus as claimed in claim 10 , wherein, on at least one side of the reversing roll stand, at least one cooling bar is arranged above a rolled material plane, in which the rolled material is guided, and at least one cooling bar is arranged below the rolled material plane.

15. A rolling apparatus for rolling a rolled material, the rolling apparatus comprising:
a reversing roll stand with an upper working roller and a lower working roller, the upper working roller and the lower working roller defining a roll gap and having a first side from which the rolled material is rolled into and out of the reversing roll stand, and a second side opposite the first side;
two upper spraying bars configured to spray a mixture of a lubricant and a carrier gas onto at least the upper working roller, one of the two upper spraying bars being on the first side and the other of the two upper spraying bars being on the second side;
two lower spraying bars configured to spray the mixture of the lubricant and the carrier gas onto at least the lower working roller, one of the two lower spraying bars being on the first side and the other of the two lower spraying bars being on the second side;
two upper cooling bars configured to dispense a coolant onto at least one of the upper working roller and the rolled material, one of the two upper cooling bars being on the first side and the other of the two upper cooling bars being on the second side;
two lower cooling bars configured to dispense a coolant onto at least one of the lower working roller and the rolled mat

Assignees

• Primetals Technologies Austria GmbH

Inventors

• Bergmann Martin
• Krimpelstaetter Konrad

Classifications

• B21B1/32 Primary

  in reversing {single stand} mills, e.g. with intermediate storage reels for accumulating work · CPC title

• B21B45/0248

  using liquid lubricants, e.g. for sections, for tubes · CPC title

• B21B45/0215 Primary

  using liquid coolants, e.g. for sections, for tubes · CPC title

• B21B45/0251

  for strips, sheets, or plates · CPC title

• B21B45/0218 Primary

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