AXISYMMETRICAL TUBE EXTRUSION THROUGH A FLAT-FACED CIRCULAR DIE - NUMERICAL CONSTRUCTION OF SLIP-LINE FIELDS AND ASSOCIATED VELOCITY-FIELDS

A numerical method of construction of axi-symmetric slip-line fields a nd their associated velocity fields [13-15] is applied to investigate the problem of axi-symmetric tube extrusion through smooth and rough. hat-faced circular dies and the salient results presented in a computo graphic manner. A reasonably satisfactory agreement was observed betwe en the estimated values of the non-dimensionalised specific extrusion pressures in each case when these were compared with the analytical an d experimental work of Kudo [6] and that carried out by the authors. T he deficiency in the technique used, the difficulties encountered and also some specific errors noticed during the construction of the field s, are highlighted and the results commented upon. Copyright (C) 1996 Elsevier Science Ltd.