Joining metal tubes in a liquid environment

Details Joining metal tubes in a liquid environment Joining metal tubes in a liquid environment

1988-09-07

1989-08-29

Nelson, Peter A.

Ammunition and explosives

Blasting

Patterned blasting

102313, 299 13, F42B 300

Patent

active

048606561

ABSTRACT:
A metal tube is expanded by means of an explosive charge into engagement with a surrounding tubular metal member which is supported externally by a surrounding metal die member spaced from the metal member, the intervening space being filled with a shock transmitting liquid such as water. The metal die member is readily separated from the expanded tube and is reusable indefinitely without maintenance. Its use is therefore more economical than the split die hitherto used. The method is especially useful for expanding large diameter tubes, for example expanding oil-well drill pipes into pipe coupling members.

REFERENCES:
patent: 3877373 (1975-04-01), Bergmann et al.
patent: 4148257 (1979-04-01), Orrill et al.
patent: 4528910 (1985-07-01), Blanc et al.

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