Importance

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Abstract

The invention relates to a method and an apparatus for the manufacture of a poly-V-pulley, particularly with a toothed reference mark sensor. The method uses per se known spin forming and combines in one setting on a spinning machine with tool changers, the method steps of upsetting, profiling and gear cutting. The method according to the invention is preferably based on a tilted circular metal blank, which has a bevelled or angled marginal area with a clearly defined length and wall thickness. From the tilted or upset blank is formed a cup-shaped preform with an asymmetrically reinforced, cylindrical area with the aid of a spinning roll and subsequently in a radial setting is infed a spinning roll with a recess and an axially limited diameter reduction and material accumulation are obtained. This is followed by preprofiling, profiling of the thickened area and a gear cutting on a simultaneously constructed reference mark sensor of an outer flange.

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First Claim