Method and apparatus for the expansion of a hollow article

Details Method and apparatus for the expansion of a hollow article Method and apparatus for the expansion of a hollow article

1978-12-20

1980-05-20

Larson, Lowell A.

Metal deforming

Process

With temperature maintenance or modification

72370, 72391, B21D 3104

Patent

active

042033136

ABSTRACT:
A method and apparatus for the expansion of a hollow article out of a memory alloy, in which the hollow article, cooled below the transformation temperature, is mounted between two mandrels each having an opposing taper, and in a first phase is expanded on one face to the final dimension by one mandrel and is supported against a stop, whereupon the final shape is produced by pulling the other mandrel through the hollow article from the opposite face.

REFERENCES:
patent: 442604 (1890-12-01), Bray
patent: 606675 (1878-07-01), Marcy
patent: 3078905 (1963-02-01), Somers et al.
patent: 3314266 (1967-04-01), Werther et al.

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