Title: Extrusion of sections by immuring technique

Authors: Kiyoyuki Ohuchi, Ken-ichi Matsuno, Hiroo Takahashi

Addresses: Department of Material Engineering, Mechanical Engineering Laboratory, Tsukuba, Japan. ' Department of Material Engineering, Mechanical Engineering Laboratory, Tsukuba, Japan. ' Faculty of Engineering, Tohohu University, Sendai, Japan

Abstract: To improve homogeneity in extrusion of sections, extrusion of aluminium by an immuring technique using lead has been studied. In steady state extrusion, the immuring material is trapped in a triangular region surrounded by a die wall, a container wall and a deforming billet, and behaves like a part of an extrusion die. The flow pattern obtained by this technique is far more homogeneous than that by using the conventional technique, and also the extrusion load is 20% lower than that by the conventional technique. The profile of the withdrawn billet can be regarded as the optimum die profile required. The profile determined in this way is very close to the theoretical optimum profile. This experimental technique can also be used to determine the die profile for the near homogeneous internal deformation.

Keywords: aluminium extrusion; immuring techniques; die profiles; homogeneous deformation; lead; internal deformation.

DOI: 10.1504/IJMPT.1989.036731

International Journal of Materials and Product Technology, 1989 Vol.4 No.2, pp.176 - 190

Published online: 06 Nov 2010 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article