Back to results
US 10,758,956 B2Granted
Method for rolling metal sheets with variable thickness
AssigneeC.R.F. Societa Consortile per Azioni
InventorsMarco Colosseo, Daniele Bassan
Life of this patent
Estimating the term…
Abstract
Described herein is a method for rolling metal sheets of variable thickness. The method makes it possible to impress, during rolling, any distribution of areas of increased thickness within a figure corresponding to the plane development of a motor-vehicle component prior to the pressing operation. Impression of the desired distribution of areas of increased thickness envisages simultaneous impression, during rolling, of a further distribution of areas of increased thickness, or compensation areas.
Claims11
A method for rolling metal sheets with variable thickness, the method including:
- determining a first distribution of areas having an increased thickness with respect to a nominal rolling thickness of the sheet, said first distribution of areas including one or more first areas, said sheet being a single metal sheet,
- determining, for each first area of said first distribution, an increase of volume of material corresponding to a difference between a volume of material underlying each first area with the increased thickness assigned on the basis of said first distribution, and a volume of material underlying a corresponding area with the nominal rolling thickness,
- determining a second distribution of areas having an increased thickness with respect to the nominal rolling thickness, wherein said second distribution of areas includes one or more second areas,
- assigning, to each second area of said second distribution an increase of volume of material corresponding to a difference between a volume of material underlying each second area with the increased thickness assigned on the basis of said second distribution, and a volume of material underlying a corresponding area with the nominal rolling thickness, wherein an overall increase of volume of the one or more second areas of said second distribution is equal or higher to an overall increase of volume of the one or more first areas of said first distribution,
- positioning the one or more first areas of said first distribution along said sheet in a desired position within a figure that corresponds to a plane development of a component of a motor-vehicle which is to undergo a pressing operation,
- positioning the one or more second areas of said second distribution outside of said figure,
- providing a pair of mill rolls having a surface relief that corresponds, developed on a plane, to the combination of the first and the second distribution of areas with increased thickness, and
- rolling said metal sheet by means of said pair of mill rolls, wherein the one or more first areas of said first distribution are created with the one or more second areas of said second distribution.
5 more elements
Dependencies are inferred from the claim text.