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Abstract: The flow characteristics in aluminum shape extrusion with
the flow-guide die added are analyzed by both the simulating experiment
method and the theoretical method. The theoretical basis for minimum
height of flow-guide die cavity is provided. The flow line equation, the
kinematically admissible velocity field , the strain rate field and the
deformation power of solid aluminum shape with thin wall extrusion are
obtained by the upper bound method based on the flow function . The
effects of the parameters , such as deformation ratio, on minimum height
of flow-guide die cavity are discussed. The minimum height when
aluminum shape with thin wall is extruded can be expressed by 0.7～0.8
b0, where b0 is the half-width of the entrance of the flow-quide die
cavity. The theoretical result is confirmed by experiment. The useful
knowledeges for die design can be obtained.
Key words: Aluminum shape Extrusion Simulating experiment
Flow-guide die Flow function method
CLC No: TG375.4
南京工程学院科研基金项目(科9937).
Received 20010814, received in revised form 20011109
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