Echtzeitprognose des Schmiedemaßes an hydraulischen Freiformpressen

Hydraulic open-die forging presses are widely used in industrial production
processes for the forming of large steel workpieces. The process
demand of achieving a given forming dimension (forging dimension) is
satisfied here using simple iterative correcting approximation algorithms.
This system, however, results in relatively large deviations in the initial
press strokes.

The present dissertation describes a process that enables this disadvantage
to be eliminated.

By measuring the curves of the forming stroke and press pressure during
the momentary forming process, it is possible to predict the curves of
these parameters over time using a real-time parameter approximation
process. A prediction model calculates cyclically the forging dimension
that can be achieved at the present time. When the press reaches the
position calculated by the model, relief of the working cylinder starts. The
optimum curve of the control function for the forging valve required is
thereby calculated during the momentary press stroke.

The theoretically calculated results have already been validated by
means of a model calculation and in tests on a trial press plant.