Thin-walled hollow wheels with internal and external toothing, and apparatus and method for manufacturing the same

A method for manufacturing a hollow wheel which comprises an internal toothing and an external toothing, wherein the internal toothing is a gear toothing, wherein a workpiece is machined by way of at least one stamping tool, wherein the workpiece comprises a tubular section with a longitudinal axis as well as at least one first stabilisation section which is connected to the tubular section for shape stabilisation of the tubular section during the machining by way of the at least one stamping tool, wherein a die is provided for receiving the tubular section, the die comprising a tubular opening in which an internal die toothing is provided, and the tubular section is inserted into the tubular opening, and the workpiece is subsequently machined on the inner side of the tubular section inserted into the tubular opening by way of the at least one stamping tool for simultaneously producing the internal toothing and external toothing, as the workpiece executes a rotation movement with a temporally varying rotation speed about said longitudinal axis and the at least one stamping tool executes radially oscillating movements which are synchronised with said rotation movement, so that the at least one stamping tool forms the tubular section into the die toothing for producing the external toothing and simultaneously producing the internal toothing by way of repeated hammering machining of the tubular section, wherein the term radially characterizes alignments perpendicular to the longitudinal axis.