Stops for curved SPF/DB sandwich fabrication

Details Stops for curved SPF/DB sandwich fabrication Stops for curved SPF/DB sandwich fabrication

1989-03-06

1990-04-17

Moon, Charlie T.

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72347, 72709, 228157, B21D 2210, B21D 2818, B21D 3920

Patent

active

049169289

ABSTRACT:
The process for forming a metallic sandwich structure having a curved surface, particularly a surface curving about more than one axis, such as a quadric surface partially by direct displacement and partially by a fluid interface. Additionally, means to restrain the work sheets being formed with respect to the shaping fixture which allow a portion of the work sheets to flow into the forming cavity before absolute restraint is applied and the restraining means function independently of the clamping force of the press.

REFERENCES:
patent: 948818 (1910-02-01), Lindholm
patent: 2582358 (1952-01-01), Schoellerman
patent: 3024525 (1962-03-01), Wisberger
patent: 3077031 (1963-02-01), Fromson
patent: 3340101 (1967-09-01), Fields, Jr. et al.
patent: 4217397 (1980-08-01), Hayase et al.
patent: 4304821 (1981-12-01), Hayase et al.
patent: 4331284 (1982-05-01), Schulz
patent: 4549685 (1985-10-01), Paez
patent: 4713953 (1987-12-01), Yavari

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