6.10.2 Gear rolling
A principal difference is made between the following different methods when transverse rolling
gears:
1. Infeed rolling: The rolling dies penetrate into the rotationally symmetric blank by a reduction
in their radial axis distance, forming the profile by the rolling kinematic of the tool and the
workpiece.
2. Through-feed rolling: In this process the rolling dies move across the entire length of the
gear to be rolled in an axial direction, their centres at a constant distance. The centre distance
is defined by the gear tooth parameters of the workpiece profile (root circle and addendum
circle diameters). In this process, as opposed to pure transverse rolling, part of the deformation
forces must also be applied in the longitudinal direction, so the rolling dies must have sloped
intakes. Their slope angle establishes the relationship between the axial and radial material
flow.