Method of manufacturing a hollow metal body

Details Method of manufacturing a hollow metal body Method of manufacturing a hollow metal body

2005-03-08

2005-03-08

Jones, David B. (Department: 3725)

Metal deforming

By application of fluent medium, or energy field

Using fixed die

C072S061000, C072S342700, C072S342940, C029S421100

Reexamination Certificate

active

06862910

ABSTRACT:
The subject matter of the present invention is a method of manufacturing, in a tool mold provided with a final contour as desired, a hollow metal body the cross-sectional shape of which varies in the longitudinal direction, an internal pressure being applied to a tubular hollow body with approximately uniform initial wall thickness, the tubular hollow body having the highest temperature in the zones of greatest deformation, the temperature in these zones being reduced once the hollow body fits against the wall of the tool mold, the temperature being subsequently increased in zones with lower degrees of deformation.

REFERENCES:
patent: 5481892 (1996-01-01), Roper et al.
patent: 5992197 (1999-11-01), Freeman et al.
patent: 6322645 (2001-11-01), Dykstra et al.
patent: 6401509 (2002-06-01), Amborn
patent: 29 41 972 (1979-10-01), None
patent: 29 41 972 (1979-10-01), None
patent: 199 44 679 (1999-09-01), None

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