Method of and apparatus for forming projections on tubular membe

Details Method of and apparatus for forming projections on tubular membe Method of and apparatus for forming projections on tubular membe

1978-07-17

1980-04-08

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

Spherical tool

72 77, B21D 1504

Patent

active

041966082

ABSTRACT:
A method of and apparatus for forming projections on tubular members or the like in which the tube forming apparatus rotates with respect to the tubular article being formed. A mandrel is provided with camming wedge members which actuate spherical forming members when the mandrel is reciprocated. Each spherical forming member projects through an aperture in a housing member which closely surrounds the mandrel. In this manner the spherical forming members engage a tubular article on the mandrel and force the contacted portion of the tubular article into a die member. The mandrel, housing member and spherical forming members are then rotated with respect to the tubular article to be formed whereby a predetermined projection is formed on the tubular article.

REFERENCES:
patent: 568574 (1896-09-01), Hoyer
patent: 629245 (1899-07-01), Frank
patent: 1727918 (1929-09-01), Ziegler
patent: 2377406 (1945-06-01), Dedrick

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