Method and forming system for producing a drum-shaped gear part

A method for producing a drum-shaped gear part through a rotational forming, wherein

• in a preforming step a rotationally symmetrical workpiece is set into rotation about its center axis and, at least through axial feeding and passing of at least one forming roller, a stretch-flow forming is carried out, wherein a cylindrical circumferential wall with a defined target wall thickness is shaped which is smaller than a basic wall thickness of the workpiece,
• subsequently in a finish-forming step the preformed workpiece is clamped onto an inner mandrel with external toothing and set into rotation and at least one profiled toothed roller is fed radially, by which the cylindrical circumferential wall, whilst maintaining the target wall thickness, is formed by the external toothing of the inner mandrel such that a drum-shaped toothed region with a splined toothing is formed, and
• during the forming of the splined toothing the workpiece is held axially and/or radially in an edge region at the open end lying opposite a radially running hub region to form an annular edge region without any teeth at the open end.