Curved core sandwich structure forming method

Details Curved core sandwich structure forming method Curved core sandwich structure forming method

1984-05-03

1986-04-15

Godici, Nicholas P.

Metal fusion bonding

Process

Using bond inhibiting separating material

228157, B23K 3102

Patent

active

045822441

ABSTRACT:
The invention involves a novel method for forming sine wave I-beams, and other sandwich structures having a curved core. The core pieces are flat prior to forming. The sandwich structure consists of two face pieces and two core pieces, wherein the core pieces are similar in shape to each other. The pieces are placed in a stack. Each core piece has two lip portions. The lip portions are extensions of the core pieces, and have a curved shape prior to forming that does not change during forming. The core pieces are joined to each other along one lip portion, and each core piece is joined to one face piece along the other lip portion. The shape of the curved core sheets and the shape of the lip portions determine the curvature of the formed core. The core pieces are unfolded and expanded in forming dies at elevated temperatures and pressures to form the desired structure.

REFERENCES:
patent: 4361262 (1982-11-01), Israeli

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