Method for producing a rolled edge
AssigneeAdval Tech Holding AG
InventorsRudolf Lüthi, Yasar Renkci, Hans Jöhr
Life of this patent
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Abstract
The invention relates to a method for the production of a rolled edge from an edge section (11) 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 (14) of the edge section (11) is previously rolled in a positive fit manner by means of a forcibly controlled tool (30). This prevents buckling of the initial area (14), 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 (10) for spray cans.
Claims8
A method for producing a rolled edge from an edge section of a tube, in which a flanging die moves into the edge section and flanges the edge section to form a roll, comprising:
- performing a preliminary rolling at an initial zone at the terminal edge of the edge section in a preliminary form-fitting manner by a positively controlled tool in order to produce a start roll, the positively controlled tool comprising a preliminary rolling die and corresponding pressure pads, the preliminary rolling die having a radius, the pressure pads having the same radius, the flanging die having the same radius and the form-fittingly rolled initial zone having the same radius.
A method for producing a rolled edge from an edge section of a tube, in which a flanging die moves into the edge section and flanges the edge section to form a roll, comprising:
- performing a preliminary rolling at an initial zone at the terminal edge of the edge section in a preliminary form-fitting manner by a positively controlled tool in order to produce a start roll, the positively controlled tool comprising a preliminary rolling die and corresponding pressure pads, the preliminary rolling die having a radius, the pressure pads having the same radius, the flanging die having the same radius and the form-fittingly rolled initial zone having the same radius, and
- wherein said initial zone is form-fittingly pressed between the radius of the preliminary rolling die and the corresponding radius of the pressure pads generating the same radius in said initial zone.
Dependencies are inferred from the claim text.