Tube expansion process

Details Tube expansion process Tube expansion process

1983-12-30

1987-03-10

Ruggiero, Joseph

Boots, shoes, and leggings

29421R, 291573C, 29523, 72 58, 72370, 364558, G06F 1546, B23P 1526

Patent

active

046494928

ABSTRACT:
A process for the controlled expansion of a conduit against the walls of a circumscribing structure is disclosed herein. The process generally comprises the steps of applying a radially expansive force to the conduit, while monitoring a variable associated with the elastic and plastic properties of the particular conduit being expanded in order to determine a final swaging force which will complete the expansion process. The process of the invention is particularly useful in eliminating the clearance between heat exchanger tubes and baffle plates in a nuclear reactor, and in sleeving operations wherein an internally inserted sleeve is plastically deformed against a heat exchanger tube in order to affect an interference joint therebetween.

REFERENCES:
patent: Re30802 (1981-11-01), Rogers, Jr.
patent: 4164807 (1979-08-01), King, Jr.
patent: 4195390 (1980-04-01), Amen
patent: 4210991 (1980-07-01), Cooper, Jr.
patent: 4364251 (1982-12-01), Nishihara et al.
patent: 4407150 (1983-10-01), Kelly
patent: 4506423 (1985-03-01), Nakamura et al.
patent: 4513497 (1985-04-01), Finch

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