中國有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 14 No. 5 October 2004 |
XIA Ju-chen(夏巨諶)3, LI Zhi-gang(李志剛)3
（1. Institute of Mechanical-Electrical Engineering, Nanchang University, Nanchang 330029, China;
2. Nanchang Institute of Aeronautical Technology, Nanchang 330034, China;
3. State Key Laboratory of Die Technology, Huazhong University of Science and Technology, Wuhan 430074, China）
Abstract:Based on the finite element simulation of profile extrusion process, the effect of local extrusion ratio, die bearing area and the distance between extrusion cylindrical center and local die orfice center on mental flow velocity was investigated. The laws of deformed metal flow on profile extrusion process were obtained. The smaller the local extrusion ratio， the faster the metal flow velocity; the smaller the area of die bearing, the faster the metal flow velocity; the smaller the distance of position of local die orifice(the closer the distance of position of local die orifice from extrusion cylindrical axis), the faster the metal flow velocity. The effect of main parameters of die structure on metal flow velocity was integrated and the mathematical model of determination of die bearing length in design of aluminum profile extrusion die was proposed. The calculated results with proposed model were well compared with the experimental results. The proposed model can be applied to determine die bearing length in design of aluminum profile extrusion die.
Key words: profile extrusion; finite element simulation; mathematical model; die bearing length
