M. Suliga, R. Kruzel, Czestochowa University of Technology, Czestochowa, Poland In the paper the infl uence of the hydrodynamic die on mechanical properties has been assessed. The drawing process of φ 5,5 mm wires to the fi nal wire of φ 2,5 mm was conducted in 7 passes, in industrial conditions, by means of a modern Koch multi-die drawing machine. The drawing speed in the last passes was 8,2 m...

The present paper considers the wire drawing process through a conical die and provides an approximate solution for force, assuming arbitrary hardening law. is based on upper bound theorem. However, this theorem does not apply to stationary flow of strain-hardening materials. Therefore, adopted engineering approach replace original material model with non-homogeneous, perfectly plastic model. k...