Multiple autofrettage

Details Multiple autofrettage Multiple autofrettage

2008-05-21

2010-10-26

Jones, David B (Department: 3725)

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

C072S056000, C072S060000, C072S061000, C029S446000, C029S447000, C029S421100

Reexamination Certificate

active

07818986

ABSTRACT:
A manufacturing method includes a first step of performing swage autofrettage on an object; a second step of heat soaking the object; and a third step of performing hydraulic autofrettage on the object. The second and third steps may be repeated one or more times. A final step may be heat soaking the object. The object may be, for example, a pressure vessel or gun barrel.

REFERENCES:
patent: 3751954 (1973-08-01), Ezra et al.
patent: 4571969 (1986-02-01), Tomita
patent: 5177990 (1993-01-01), Isgen
patent: 6154946 (2000-12-01), Kapp
patent: 6418770 (2002-07-01), Binno
patent: 6931776 (2005-08-01), Wagner et al.
patent: 7036346 (2006-05-01), Burger

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