Apparatus for forming a split tube

Details Apparatus for forming a split tube Apparatus for forming a split tube

1981-11-02

1983-09-13

Combs, Ervin M.

Metal deforming

By tool-couple pressing together adjacent surface portions...

To form longitudinally-seamed tube

72283, 72467, 228 175, B21C 124

Patent

active

044034911

ABSTRACT:
A die member has a conical bore with a cylindrical extension, and a shallow groove in the conical bore; a conical mandrel with a cylindrical extension fills the conical bore, except for the groove which merges into an annular space between the cylindrical bore and the extension. A metal strip is pulled through the groove and the space is to be folded into a split tube.

REFERENCES:
patent: 228947 (1880-06-01), Seaman
patent: 946631 (1910-01-01), Ballou
patent: 1004083 (1911-09-01), Ritter
patent: 3295349 (1967-01-01), Maropis
patent: 3693398 (1972-09-01), Pedersen
patent: 3945552 (1976-03-01), Tobita et al.
patent: 4148426 (1979-04-01), Midzutani et al.
patent: 4204415 (1980-05-01), Braad et al.

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