Cleaning rolling stock during cold rolling of the rolling stock

Patent metadata

Field	Value
Publication number	US-11554396-B2
Application number	US-201816619284-A
Country	US
Kind code	B2
Filing date	Jun 12, 2018
Priority date	Jun 29, 2017
Publication date	Jan 17, 2023
Grant date	Jan 17, 2023

Abstract

A method for cleaning rolling stock ( 5 ) during cold rolling of the rolling stock ( 5 ) in a tandem mill ( 1 ) which includes a plurality of mill stands ( 7, 9 ). The rolling stock ( 5 ) is moved through the tandem mill ( 1 ) in a direction of movement ( 3 ) and a cleaning liquid ( 26 ) is sprayed onto the rolling stock ( 5 ) between two roll stands ( 7, 9 ) in a spraying direction having a component opposite to that of the direction of movement ( 3 ).

First claim

The invention claimed is:

1. A method for cleaning a workpiece during cold rolling of the workpiece in a tandem mill having a plurality of mill stands, the workpiece having a first edge and a second edge opposite the first edge, the method comprising:
moving the workpiece through the tandem mill in one direction of rolling; and
spraying a cleaning liquid from a plurality of nozzles of a spraying bar between two of the mill stands onto the workpiece in a spraying direction having a component that is counter to the direction of rolling, no spraying direction of each of the plurality of nozzles being oriented to cross each other, and
pivoting the spraying bar to adjust a spraying angle of the plurality of nozzles between the spraying direction and a surface of the workpiece,
wherein each nozzle of the plurality of nozzles is either closer to the first edge of the workpiece and farther from the second edge of the workpiece, or closer to the second edge of the workpiece and farther from the first edge of the workpiece, wherein each nozzle of the plurality of nozzles is oriented to spray the cleaning liquid in a respective spray direction toward the edge of the workpiece that is closer thereto, and none of the nozzles from the plurality of nozzles is oriented to spray the cleaning liquid in a respective spray direction toward the edge of the workpiece that is farther thereto.

2. The method as claimed in claim 1 , wherein the cleaning liquid is sprayed onto the workpiece between the first mill stand and the second mill stand of the plurality of mill stands.

3. The method as claimed in claim 1 , further comprising spraying the cleaning liquid onto the workpiece between the second mill stand and the third mill stand of the plurality of mill stands.

4. The method as claimed in claim 1 , further comprising using an emulsion as the cleaning liquid.

5. The method as claimed in claim 1 , further comprising using water as the cleaning liquid.

6. The method as claimed in claim 1 , further comprising spraying the cleaning liquid onto the workpiece at a pressure of between 6 and 100 bar.

7. The method as claimed in claim 1 , further comprising varying the spraying direction of the cleaning liquid across a width of the workpiece at right angles to the direction of rolling.

8. The method as claimed in claim 1 , further comprising spraying the cleaning liquid on an upper surface and a lower surface of the workpiece.

9. A method for cleaning a workpiece during opposite direction reversing cold rolling of the workpiece in a mill stand, the workpiece having a first edge and a second edge opposite the first edge, the method comprising:
moving the workpiece through the mill stand in alternately opposite directions of rolling the workpiece in a plurality of rolling passes; and
between two of the rolling passes, spraying a cleaning liquid, from a plurality of nozzles, the plurality of nozzles being arranged along only a single continuous line starting at the first edge and ending at the second edge of the workpiece, onto the workpiece in a spraying direction having a component that is counter to the direction of rolling, no spraying direction of each of the plurality of nozzles being oriented to cross each other, wherein each first nozzle of the plurality of nozzles is closer to the first edge of the workpiece and farther from the second edge of the workpiece, wherein each second nozzle of the plurality of nozzles is closer to the second edge of the workpiece and farther from the first edge of the workpiece, wherein each nozzle of the plurality of nozzles is oriented to spray the cleaning liquid in a respective spray direction toward the edge of the workpiece that is closer thereto, and none of the nozzles from the plurality of nozzles that is arranged along the single continuous line is oriented to spray the cleaning liquid in a respective spray direction toward the edge of the workpiece that is farther thereto.

10. The method as claimed in claim 9 , further comprising spraying the cleaning liquid onto the workpiece between a first rolling pass and a second rolling pass.

11. The method as claimed in claim 9 , further comprising spraying the cleaning liquid onto the workpiece between a second rolling pass and a third rolling pass.

12. A tandem mill for cold rolling of a workpiece that is being moved in one direction of rolling through the tandem mill, the tandem mill comprising:
a plurality of mill stands arranged in tandem along the one direction of rolling; and
at least one spraying bar disposed between two of the mill stands, the spraying bar being pivotable to permit adjustment of a spraying angle between a spraying direction and a surface of the workpiece, the spray bar having a plurality of nozzles from which a cleaning liquid is sprayed onto the workpiece in a spraying direction having a component that is counter to the direction of rolling, no spraying direction of each of the plurality of nozzles being oriented to cross each other, wherein each nozzle of the plurality of nozzles is either closer to a first edge of the workpiece and farther from a second edge of the workpiece, or closer to the second edge of the workpiece and farther from the first edge of the workpiece, wherein each nozzle of the plurality of nozzles is oriented to spray the cleaning liquid in a respective spray direction toward the edge of the workpiece that is closer thereto, and none of the nozzles from the plurality of nozzles is oriented to spray the cleaning liquid in a respective spray direction toward the edge of the workpiece that is farther thereto.

Assignees

• Primetals Technologies Austria GmbH

Inventors

• Bergmann Martin
• Krimpelstaetter Konrad

Classifications

• B21B45/0275 Primary

  Cleaning devices · CPC title

• B21B2001/221

  by cold-rolling · CPC title