Modeling of Material Flow During Upsetting Between Parallel
Pressure Plates
Erno Halbritter
Department of Materials and Manufacturing Technology
Széchenyi István University of Applied Sciences,
Gyõr, Hungary
halbritt@szif.hu
Abstract:
The upsetting of compact and ring-shaped work pieces is a well-known problem
of plastic forming. Depending on the conditions of friction a work piece
becomes bilge during upsetting. This paper demonstrates the mathematical
modeling of material flow with respect to the coefficient of friction. In
the presented solution the grade of bilge depends on a free parameter of the
velocity field. The best value of this free parameter can be determined by
minimization of the power requirement for the forming. By using the
applied method the actual deformation of the work piece can be determined with
good accuracy.
