Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1998-08-13
1999-09-14
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72393, B21D 1506
Patent
active
059504722
ABSTRACT:
Apparatus for forming beads in the cylindrical wall of a metal drum blank comprising a die head and an opposed roller, for engaging the interior and exterior surfaces, respectively, of a cylindrical drum blank. The die head has first, second and third coaxial, circular dies, each made up of plural, wedge-shaped die elements. The roller has two coaxial peripheral edges cooperable with the dies to form a W-style bead. The second die is located between the first and third dies and is radially expansible, by the frusto-conical surface of a cam, for producing a standard bead. The same frusto-conical surface also expands the first die, and a separate frusto-conical surface expands the third die. Lands on the cam engage the wedge-shaped elements of the first and third dies and maintain the first and third dies at fixed radial positions in engagement with the inner cylindrical wall of a drum blank, while the cam continues to urge the wedge-shaped elements of the second die radially outwardly. The die head optionally includes a fourth circular die spaced axially from, but coaxial with, the first, second and third dies, and a second roller opposed to, and cooperable with, the fourth die for forming a reduced neck in a drum blank.
REFERENCES:
patent: 1782994 (1930-11-01), Lindgren
patent: 1908521 (1933-05-01), Lindgren
patent: 2089476 (1937-08-01), Grotnes
patent: 4487048 (1984-12-01), Frei
patent: 5212866 (1993-05-01), Wenzel et al.
Babcock Kenneth R.
Grotnes Carl C.
Tan Archie
Atlanta Grothes Machine Company
Larson Lowell A.
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