Method of joining concentric cylinders

Details Method of joining concentric cylinders Method of joining concentric cylinders

1987-02-24

1988-05-24

Godici, Nicholas P.

Metal fusion bonding

Process

Metal to nonmetal with separate metallic filler

228124, 228243, 29421R, 72 61, B23K 3102, B23K 3106

Patent

active

047460547

ABSTRACT:
A method of forming a composite metal-ceramic helix structure suitable for TWT application. The method includes concentrically joining a metal cylinder disposed within a ceramic cylinder to form a high strength hermetic bond therebetween having good thermal conductivity. Prior to joining the cylinders a predetermined quantity of heat vaporizable liquid is disposed within the metal cylinder and its ends are sealed off. During the brazing process the liquid vaporizes ensuring intimate contact between the concentric cylinders. Thereafter the metal cylinder ends are removed and the resulting concentric structure machined into a helical shape.

REFERENCES:
patent: 895412 (1908-08-01), Badger
patent: 2570248 (1951-10-01), Kelley
patent: 2779279 (1957-01-01), Maiwurm
patent: 3408728 (1968-11-01), Fickett et al.
patent: 4533806 (1985-08-01), Kawasaki

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