首页|THREE DIMENSIONAL UPPER BOUND MODELLING FOR EXTRUSION OF ROUND-TO-OCTAGON SECTION USING LINEARLY CONVERGING DIE
THREE DIMENSIONAL UPPER BOUND MODELLING FOR EXTRUSION OF ROUND-TO-OCTAGON SECTION USING LINEARLY CONVERGING DIE
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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.
SERRroundoctagonextrusiondie
K P Maity、A. K. Rout
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Department of Mechanical Engineering, National Institute of Technology, Rourkela, Orissa, INDIA
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