Three Dimensional Upper Bound Modelling for Extrusion of Round-to-Octagon Section Using Linearly Converging Die

Abstract:

The extrusion of section from round billet poses a great challenge for theoretical modeling of the process using upper bound method. The greatest difficulty in three-dimensional upper bound method is to determine kinematically admissible velocity field. The SERR (Spatial Elementary Rigid Region) technique is fairly applicable for analyzing extrusion of sections having re-entrant corners. A modified version of SERR technique has been used for extrusion of octagon sections from round billet through a linearly converging die. The circular cross section of the round billet is approximated by a regular polygon of equal area. The extrusion pressure has been computed for different boundary condition at the die billet interface. The optimum die geometry has been determined.

• Periodical: Key Engineering Materials (Volume 424)
• Pages: 189-196
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.424.189
• Online since: December 2009
• Authors: Kali Pada Maity, Akshaya Kumar Rout
• Keywords: Die, Extrusion, Octagon, Round, SERR

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