Method for rolling plates, computer program, data carrier and control device

Patent metadata

Field	Value
Publication number	US-9346088-B2
Application number	US-201214119998-A
Country	US
Kind code	B2
Filing date	May 4, 2012
Priority date	May 24, 2011
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

Trouble-free operation of an installation for rolling plates or sheets that have lost their rectangular form and have the form of a parallelogram is ensured by preventing the plate from meandering as it enters a rolling stand. A first rolling pass is carried out and, when the plate runs out from the rolling stand, it is determined whether the side faces of the plate are offset in relation to one another in the rolling direction. If the side faces of the plate are offset in relation to one another in the rolling direction, i.e. if the plate is parallelogram-shaped and has an oblique end, in a second rolling pass guiding elements of the rolling stand are set asymmetrically with respect to a center line. A first guiding element for the side face, which is the first to enter the rolling stand in the second rolling pass, is thereby adjusted further away from the center line than the second guiding element.

First claim

The invention claimed is:

1. A method for rolling a plate, comprising:
providing at least one rolling stand, the at least one rolling stand having a pair of rollers through which the plate rolls, the at least one rolling stand also having first and second guiding elements upstream from the rollers, the first and second guiding elements opposing one another and being provided on either side of a center line of the at least one rolling stand, the first guiding element being adjacent to a first side face of the plate, the second guiding element being adjacent to a second side face of the plate;
performing a first rolling pass through the rollers of the at least one rolling stand;
detecting whether the first and second side faces of the plate are offset from one another in a rolling direction when the plate emerges from the first rolling pass; and
centering the plate before a second rolling pass, wherein the guiding elements abut the plate in a centering position, and
after centering the plate, adjusting positions of the guiding elements before the second rolling pass such that if the first and second side faces of the plate are offset from one another when the plate emerges from the first rolling pass, the guiding elements are shifted such that:
if the first side face of the plate emerges first, the first guiding element is positioned further from the center line than the second guiding element when the plate enters the rollers at a beginning of the second rolling pass, and

if the second side face of the plate emerges first, the second guiding element is positioned further from the center line than the first guiding element when the plate enters the rollers of the second rolling pass.

2. The method as claimed in claim 1 , wherein the first and second rolling passes are performed at the at least one rolling stand and a second rolling stand, respectively.

3. The method as claimed in claim 1 , wherein the first and second rolling passes are performed at the at least one rolling stand.

4. A method for rolling a plate by at least one rolling stand, wherein the at least one rolling stand features a first and second guiding elements for centering the plates, and the first and second guiding elements are arranged symmetrically in relation to a center line of the at least one rolling stand, said center line extending in a rolling direction, comprising:
carrying out a first rolling pass of the plate by the at least one rolling stand;
detecting whether side faces of the plate are offset relative to each other in a rolling direction when the plate emerges from the at least one rolling stand;
centering the plate before a second rolling pass of the plate by the at least one rolling stand by abutting the plate with the first and second guiding elements in a centering position; and
setting the first and second guiding elements asymmetrically relative to the center line in the second rolling pass if the side faces of the plates are offset relative to each other in the rolling direction, such that the first guiding element, for the side face which enters the rolling stand first in the second rolling pass, is further from the center line than the second guiding element.

5. The method as claimed in claim 4 ,
further comprising keeping the second guiding element in its centering position for a side face which enters the at least one rolling stand second in the second rolling pass.

6. The method as claimed in claim 5 ,
further comprising setting a tolerance gap having a width of a few centimeters between the first guiding element and a side face of the plate which is oriented towards it.

7. The method as claimed in claim 5 ,
further comprising setting a tolerance gap having a width of 6 to 10 cm between the first guiding element and a side face of the plate which is oriented towards it.

8. The method as claimed in claim 4 , further comprising:
measuring a rolling force on both a drive side and an operator side of the at least one rolling stand; and
checking whether the side faces of the plate are offset relative to each other in the rolling direction.

9. The method as claimed in claim 4 , further comprising resetting the first and second guiding elements symmetrically after the second side face has entered the at least one rolling stand.

10. The method as claimed in claim 4 , further comprising:
arranging a plurality of rolling stands in a rolling direction; and
setting first and second guiding elements of a respectively next rolling stand asymmetrically during an entry of the plate, if an offset of the side faces of the plate in the rolling direction is identified.

11. The method as claimed in claim 4 , further comprising rolling the plate by at least one reversible rolling stand and adjusting guiding elements of the at least one reversible rolling stand when the rolling direction changes.

12. A non-transitory computer readable storage medium storing a computer program, which when executed by a control device for the at least one rolling stand causes the at least one rolling stand to be operated in accordance with the method as claimed in claim 4 .

Assignees

• Thiele Konrad
• Primetals Technologies Germany Gmbh

Inventors

• Thiele Konrad

Classifications

• B21B39/16 Primary

  immediately before entering or after leaving the pass · CPC title

• B21B2273/14

  Front end or leading end · CPC title

• B21B1/22 Primary

  for rolling {plates, strips,} bands or sheets of indefinite length (B21B1/42 takes precedence) · CPC title