Method and apparatus for securing structural tubes in nuclear re

Details Method and apparatus for securing structural tubes in nuclear re Method and apparatus for securing structural tubes in nuclear re

1985-10-23

1988-10-11

Terapane, John F.

Metal deforming

By relatively receding work-engaging tool-faces

Embodying three or more tools

376449, 292835, 29523, 29723, B21D 4102

Patent

active

047761989

ABSTRACT:
An insert for providing a reduced inside diameter for a structural tube, specifically an instrumentation guide tube, of a nuclear fuel assembly. The insert has forming lobes which coact with the structural tube to plastically deform the structural tube and mechanically lock it with respect to grid straps of a grid assembly. The insert also has centering lobes to prevent it from being expanded in other than a coaxial alignment with the structural tube. An expansion tool is provided for sequentially registering with and expanding sequential forming lobes in a simplified manner whereby all of the operations necessary to assemble the structural tube in the fuel assembly can be easily and accurately performed.

REFERENCES:
patent: 3024051 (1962-03-01), Hullinger
patent: 3358492 (1967-12-01), Richter
patent: 3831413 (1974-08-01), Glatthorn
patent: 4182152 (1980-01-01), Vaill et al.
patent: 4229259 (1980-10-01), Vaill et al.
patent: 4242893 (1981-01-01), Diller

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