Flat product made of a metal material, in particular a steel...

B - Operations – Transporting – 21 – B

Patent

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Details

B21B 1/22 (2006.01) B21B 27/00 (2006.01)

Patent

CA 2687869

The invention allows the planned provision of a flat metal product with such a finely-dimensioned, stochastic or quasi-stochastic surface structure that said structure can then be visually perceived only slightly, if at all, following a application of a surface coating typical in the case of automobiles. In the case of a surface topography provided according to the invention, the transition between the plateaus and the valleys takes place simultaneously by means of steep flanks. The result of this is that the morphology of the thin sheet surface is virtually independent of the actual depth of the valleys. As a result, the morphology of the thin sheet surface of a flat metal product according to the invention is therefore also independent of the degree of dressing which is applied by a dressing roller during the production of the thin sheet texture.

L'invention permet de former un produit métallique plat qui présente une structure stochastique ou quasi-stochastique de surface en éléments fins, de telle sorte qu'après une application de peinture typique de l'automobile, cette structure ne puisse être détectée visuellement que faiblement ou même ne puisse pas être détectée. En même temps, dans une topographie de surface formée selon l'invention, le passage entre les plateaux en relief et les creux est formé de flancs accusés. De cette manière, on obtient le résultat que la morphologie de la surface de la tôle fine soit en pratique indépendante de la profondeur effective des creux. Le résultat en est que la morphologie de la surface de la tôle fine d'un produit métallique plat selon l'invention est indépendante du degré de dressage appliqué lors de la formation de la texture fine de la tôle par un cylindre de dressage.

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