Abstract: In the extrusion of shapes with flat-faced die ,the proper
design of die land is of critical importance in avoiding the
generations of geometry defects. A methodology for the design of
die land, which consists of a simulation-adjustment iteration,
is proposed. The metal flow in extrusion is simulated by the
three dimensional finite element method and the die land is
adjusted according to the simulation result. Both the formulae
for adjustment of the die land and the criterion for the
judgment of proper die land are suggested. The extrusion of an
L-section shape is chosen as the computational example and the
result is compared with the industrial design.
Key words: Extrusion Die design Finite element method
*
This project
is supported by Provincial Youth Science Foundation of Shanxi.
Manuscript received on September 28, 1999; revised manuscript November
20, 1999
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