Explosive expansion of metal tubes

Details Explosive expansion of metal tubes Explosive expansion of metal tubes

1988-09-02

1989-11-14

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

72 54, 72 56, 72 61, 72706, 72430, 294212, 228107, B21D 2608

Patent

active

048798908

ABSTRACT:
In a method of explosively expanding a tubular metal component into engagement with a surrounding metal component, an explosive charge is disposed axially and fired in an insert having a hollow cylindrical container fitting closely within the portion of the tubular metal component to be expanded and having charge holding device, for example an axial pocket, to accommodate the explosive charge, the container being filled with a shock wave-transmitting liquid. Compared with solid inserts, the novel hollow insert is cheaper and requires a smaller explosive charge for a given operation. The method is especially advantageous for expanding large diameter tubes.

REFERENCES:
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patent: 3235955 (1966-02-01), Kunsagi
patent: 3364561 (1968-01-01), Barrington
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patent: 3863327 (1975-02-01), Legate et al.
patent: 4187709 (1980-02-01), Legate et al.
patent: 4669649 (1987-06-01), Persson
patent: 4685205 (1987-08-01), Schroeder et al.

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