Stretch-forming process

Details Stretch-forming process Stretch-forming process

1985-04-22

1987-11-10

Thurlow, Jeffery

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72296, 72369, 264291, 264292, 264294, 264339, 264573, B21D 702, B21D 1102, B29C 5308, B29C 5522

Patent

active

047048867

ABSTRACT:
A novel and improved method of deforming elongated hollow members so as to maintain uniform cross-sectional profile, uniform section thickness reduction, and minimal springback characteristics which includes superimposing in the forming process an internal fluid pressure support for the hollow member which imposes a circumferential tension thereon, a longitudinal tension which plastically elongates the member, and a transverse bending load which plastically bends the member.

REFERENCES:
patent: 203842 (1878-05-01), Leland
patent: 567518 (1896-09-01), Simmons et al.
patent: 2464169 (1949-03-01), Bentley
patent: 3105537 (1963-10-01), Foster
patent: 3328996 (1967-07-01), Pin et al.
patent: 3673845 (1972-07-01), Vercoglio
patent: 3753635 (1973-08-01), Barnett
patent: 4462950 (1984-07-01), Nilsson et al.

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