中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
Vol. 20 No. 6 June 2010 |
(State Key Laboratory for Fabrication and Process of Nonferrous Metals,
General Research Institute for Nonferrous Metals, Beijing 100088, China)
Abstract:In order to investigate the effects of pockets in the porthole die on the metal flow, temperature at the die bearing exit and the extrusion load were contrasted with the traditional die design without the pockets in the lower die. Two different multi-hole porthole dies with and without pockets in lower die were designed. And the extrusion process was simulated based on the commercial software DEFORM-3D. The simulation results show that the pockets could be used to effectively adjust the metal flow and especially benefit to the metal flow under the legs. In addition, the maximum temperature at the die bearing and the peak extrusion load decrease, which indicates the possibility of increasing the extrusion speed and productivity.
Key words: FEM simulation; aluminum; extrusion; porthole die; die design