Measurement of Pressure and Friction on the Container Surface during Aluminum Hot Extrusion
Takeshi Yoneyama, Kanazawa University
Masaya Takahashi, Sumitomo Light Metal Industry Co. Ltd.
Track: EXTRUSION PROCESS - Metal Flow
ABSTRACT --- A new pressure sensor and a new friction sensor are developed to
detect the stress acting on the boundary surface between the billet and the container
during the hot extrusion of aluminum alloy A6063. Pressure and frictional stress
distribution on the container surface are measured at various initial billet temperature
conditions. It is revealed that high frictional stress is exerted in the front part of the stem
on the boundary surface between the billet and the container. Although the taper
temperature billet is one of the methods to achieve isothermal extrusion, pressure and
frictional stress near the stem are higher than those of uniform temperature billet that is
properly heated higher than the container temperature.
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