Tool design optimization in extrusion processes

✍ Scribed by Aleš Mihelič; Boris Štok

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 866 KB
• Volume: 68
• Category: Article
• ISSN: 0045-7949
• DOI: 10.1016/s0045-7949(98)00019-4

✦ Synopsis

Tool design optimization in steady-state extrusion processes, based on the ®nite element discretization and nonlinear mathematical programming techniques, is considered in this paper. In order to perform the optimization the die geometry is adequately parameterized, according to the polynomial representation. By imposing real technological and geometry constraints the optimal tool design is eected by extremizing the actual optimization objectives. In particular, the minimization of the forming energy consumption and the maximization of the possible area reduction are considered. The results, obtained numerically by assuming the Lagrange incremental elastic± plastic ®nite element formulation in modelling the material ¯ow and the considered optimization approach, are compared to the known theoretical solutions, in cases where such solutions are available. It is demonstrated that the discussed approach is quite eective.