Analysis of Cold Extrusion of Non Re-entry Product Shapes

[+] Author and Article Information
Santosh Kumar, Kripa Shanker, G. K. Lal

Indian Institute of Technology, Kanpur, India

J. Manuf. Sci. Eng 124(1), 71-78 (Feb 01, 2001) (8 pages) doi:10.1115/1.1413777 History: Received September 01, 1998; Revised February 01, 2001
Copyright © 2002 by ASME
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Variation of total power and its constituents with die length for 3rd order polynomial die
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Examples for validation of the model (a) rounded square (b) ellipse (c) clover and (d) trocoidal sections
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Extrudable shapes (a) non re-entry (b) re-entry
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Deformation zone and typical stream surfaces in extrusion
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Geometry of die and streamlines in an extrusion die
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Construction of power elements for a general non re-entry extrudable shape
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Relationship between die surface and projected surface for frictional power calculations
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Comparision of extrusion pressure evaluated for circular section with experimental results of Yang et al. (1990)
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Variation of extrusion stress at different reductions (example Fig. 8) using a 3rd order polynomial die
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Variation of relative extrusion stress with friction and die length at 80% reduction
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Variation of relative extrusion stress with friction at different reductions



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