Adval Tech Holding Ag

Hans Jöhr

Philipp Michel

Rudolf Lüthi

Yasar Renkci

The invention relates to a method for the production of a rolled edge from an edge section () of a tube, wherein a flanging die is driven onto the edge section and flanges it into a roll. According to the invention, an initial area () of the edge section () is previously rolled in a positive fit manner by means of a forcibly controlled tool (). This prevents buckling of the initial area (), which has a controlled geometry as a result of rolling. The novel method is preferably used in the production of valve seats in so-called aerosol domes () for spray cans.

Method for producing a rolled edge

The invention relates to a method for producing lamella packets (e.g.) such as those used for adjustable steering columns in automobiles. According to the invention, at least one of the lamellae (e.g.) is provided with a collar () and is joined to another lamella (e.g.) so that the collar () of the first lamella () is supported against the other lamella () whereby defining the width (B) of a space between the lamellae (). Both lamellae () are welded at at least one location of the collar (). The welding is preferably carried out by resistance welding. In order to obtain defined ratios, the edge of the lamella collar () is preferably provided with projecting points (Z). The method is, among other things, advantageous in that the same material quality can be used for all lamellae ().

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Kehrsatz, Switzerland

Hans Jöhr