Method of extruding hollow light metal member, die for...

Details Method of extruding hollow light metal member, die for... Method of extruding hollow light metal member, die for...

2007-07-03

2007-07-03

Tolan, Ed (Department: 3725)

Metal deforming

By extruding through orifice

Utilizing internal forming means

C072S467000, C076S107100

Reexamination Certificate

active

10556800

ABSTRACT:
It is an object to realize and establish new extrusion technology for manufacturing a light-metal hollow member (product) having excellent mechanical properties with constant stability and also efficiently manufacturing the product having a strength satisfying a required level at low cost, by using a hollow die such as a bridge die. The object is achieved by dividing and joining/welding a light-metal material with a hollow extrusion die and then extruding the light-metal material to form in a desired cross-sectional shape through a die opening, wherein the strain level applied to the light-metal material after the joining/welding is maintained at 1.8 or more and the extrusion is performed.

REFERENCES:
patent: 3520168 (1970-07-01), Braeuninger
patent: 3575030 (1971-04-01), Braeuninger
patent: 4425374 (1984-01-01), McCutcheon, Sr.
patent: 5296190 (1994-03-01), Premkumar
patent: 6233500 (2001-05-01), Malas et al.
patent: 2002-18515 (2002-01-01), None
patent: 2003-13191 (2003-01-01), None

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