Seal bead for superplastic forming of aluminum sheet

Details Seal bead for superplastic forming of aluminum sheet Seal bead for superplastic forming of aluminum sheet

1999-05-10

2000-04-11

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72 57, 72350, B21D 2602, B21D 2222

Patent

active

060475838

ABSTRACT:
A cusp-shaped binder surface seal bead for a superplastic forming die or tool engages a sheet workpiece, especially an aluminum sheet, in a gas tight seal but displaces so little workpiece material that the formed sheet does not bond to the tool and is easily removed at the completion of the forming operation. The cusp shape may be truncated and the seal shape may incorporate adjacent valleys recessed in the otherwise flat binder surface.

REFERENCES:
patent: 4087037 (1978-05-01), Schier et al.
patent: 4197978 (1980-04-01), Kasper
patent: 4331284 (1982-05-01), Schulz et al.
patent: 4603808 (1986-08-01), Stacher
patent: 4691857 (1987-09-01), Friedman
patent: 5035133 (1991-07-01), White et al.
patent: 5157969 (1992-10-01), Roper
patent: 5603449 (1997-02-01), Mansbridge et al.
Hamilton et al, "Superplastic Sheet Forming," Metals Handbook, Ninth Edition, vol. 14, "Forming and Forging," pp. 852-867.

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