Method and apparatus for forming an end portion of a cylindrical

Details Method and apparatus for forming an end portion of a cylindrical Method and apparatus for forming an end portion of a cylindrical

1998-11-06

2000-02-01

Larson, Lowell A.

Metal deforming

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

Tool orbiting or rotating about an axis

72120, B21D 4104

Patent

active

06018972&

ABSTRACT:
The present invention is directed to a method and apparatus for forming an end portion of a cylindrical member or cylinder. A main shaft is positioned on a plane including the central axis of the cylinder, in parallel therewith. At least one roller is supported on the main shaft to be radially moved to and from the main shaft. The cylinder is held to position the central axis thereof in parallel with the main shaft. Then, at least one of the cylinder and the roller is moved relative to each other, with the central axis of the cylinder held in parallel with the main shaft, while the roller is moved radially toward an eccentric axis offset from the central axis of the cylinder, with the roller being in substantial contact with the outer surface of the one end portion of the cylinder. And, at least one of the cylinder and the roller is driven to be rotated relative to each other about the eccentric axis of the cylinder. As a result, a reduced diameter portion such as a tapered portion having the eccentric axis is formed on the one end portion of the cylinder.

REFERENCES:
patent: 1500261 (1924-07-01), Page
patent: 4563887 (1986-01-01), Bressan et al.
V.G. Sereda et al., Calculation of the Energy and Force Parameters in Planetary Rolling of Tubular Blanks, Kuznechnoshtampovochnoe proizvodstvo, 1989, (5), pp. 2-4.
Matthew, P., "Eccentric Metal Spinning-A New Method to Produce Multi-Recessed Parts" Metallurgia and Metal Forming, Dec. 1974, pp. 378-379.

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