Improved Method For Better Temperature
Assessment In The Contact Of Die Bearing Surface
With Profile Surface In Aluminium Hot Extrusion
Author(s)
R. Turk, M. Terčelj, P. Fajfar & G. Kugler
Abstract
The paper presents an improved technique of temperature measurement on the
bearing surface of industrial die during hot extrusion of aluminium and an
assessment of the heat transfer coefficient from the extruding profile on the
bearing surface. The measurement was carried out by using a method of split die
and three thermocouples (incorporation of the K type and welded at distances
from 0.18 to 1.32 mm from the bearing surface) with high measuring accuracy.
Extrusion exit speeds were increased to the extent that Mg2Si, with a known
melting point, started to melt on the extruded profile. This state was determined
by the phenomenon of oscillations of the measured temperature of the nearest
two thermocouples and by the phenomenon
Keywords
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