Process for the production of a hollow body of revolution and/or container
AssigneeMaschinenfabrik Augsburg-Nurnberg Aktiengesellschaft
InventorsHorst-Lothar Erfurt, Holger Kreft, Walter Tronsberg
Life of this patent
Estimating the term…
Abstract
Process for the production of a hollow body of revolution and/or container including the successive steps of forming a dish-shaped blank by a non-cutting shaping operation, forming a bottom portion and an adjoining tubular portion from the blank by a turning operation, and stretching at least the upper part of the bottom portion and the tubular portion to form a convex bottom and pipe portion respectively to form the thin walled body of revolution.
Claims39
Process of producing a thin-walled body of revolution having a dish-shaped convex bottom adjoining a cylindrical pipe portion comprising:
- forming a dish-shaped blank by a non-cutting shaping operation,
- forming a bottom portion and an adjoining tubular portion from said blank by a cutting turning operation,
- and stretching at least the upper part of said bottom portion and said tubular portion to form said convex bottom and said pipe portions respectively.
Process for producing a thin-walled body of revolution having a cylindrical pipe portion adjoining a dish-shaped bottom convex with respect to said pipe portion comprising:
- forming a dish-shaped blank,
- forming a bottom portion and an adjoining tubular portion from said blank by a cutting turning operation only, said bottom portion defining a lower part and an upper part, said lower part defining a sector of a sphere, said upper part defining a radially outwardly projecting bulge,
- shaping the upper part of said bottom portion to form a hemisphere with the lower part of said bottom portion by a projection stretching step, and
- stretching said tubular portion to form said pipe portion by a non-cutting shaping operation.
Dependencies are inferred from the claim text.