Patent ID: 9399251
Filing Date: 2016-07-26
CPC Classification: B21K

Claim Text:
1. A method for manufacturing a gear wheel for use in a gearbox, the gear wheel comprising a finish-swaged stub toothing; the method comprising the steps of: (a) drop-forging a gear-wheel body having an initial stub toothing, the initial stub-toothing comprising a plurality of teeth and a plurality of inter-tooth spaces, each tooth having a tooth flank and a tooth root, and respective adjacent teeth being separated by a respective inter-tooth space of the plurality of inter-tooth spaces; (b) holding the gear-wheel body between an upper holding plate and a lower holding plate; (c) subsequent to step (a), cold die-grooving the initial stub toothing using a swaging tool to transform the initial stub-toothing into the finish-swaged stub toothing the swaging tool comprising a plurality of swaging parts disposed in a fan-like pattern and a plurality of swaging ends, each swaging part having a respective swaging end, the cold-die grooving being performed by wherein the pre-determined direction is oblique to the tooth root for flowing material after complete filling of a hollow profile of a die flows into a cavity of the die adjoining a region of the tooth roots.