Metal deforming – By application of fluent medium – or energy field – Using fixed die
Patent
1997-11-14
1999-06-29
Jones, David
Metal deforming
By application of fluent medium, or energy field
Using fixed die
72709, 294211, B21D 2210, B21D 2602
Patent
active
059163160
ABSTRACT:
A superplastically formed part having tailored thickness in particular areas Includes a formed blank having a preformed portion and a formed portion. The preformed portion is preformed as a bulge into a recess in a die lid, and then the bulge is reversed into a cavity in a die base as a prethinned area which delivers unthinned portions of the blank for final forming to regions of the die base cavity over which thinned portions of the blank would otherwise be formed and further thinned by final forming.
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Hammar John C.
Jones David
The Boeing Company
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