Plunge swaging for local cross-sectional reduction with steeper transition angles:

By infeed swaging, the workpiece is fed axially at a constant rate of speed through the oscillating dies. Most of the forming energy is concentrated in the tapered section of the dies.

The infeed motion is achieved by tapered strikes and calibration shims.

The swaging head is equipped with calibration shims between the strikes and dies.

In addition to radial oscillations, with plunge swaging the dies perform a larger radial closing and opening movement.

The forming energy is concentrated in the tapered and in the cylindrical areas.
Plunge swaging also permits cross section reductions between both workpiece ends.

The cylindrical section of the dies is used for calibration of the reduced cross-section. Internal profiles with close tolerances can be produced by use of a rotary swaging mandrel. A special mandrel enables the production of cylindrical or tapered bores with close tolerances.

Swaging also allows production of internal profiles such as splines, internal hexagon forms and other non-circular forms.

The achievable tolerances are comparable to cutting machining.
Depending on the forming ratio and the configuration of the dies, the workpiece diameter has a range of ± 0.01 mm to ± 0.1 mm.