Method of producing hermetically sealed end in a tubular workpie

Details Method of producing hermetically sealed end in a tubular workpie Method of producing hermetically sealed end in a tubular workpie

1976-10-05

1977-11-29

Larson, Lowell A.

Metal deforming

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

With modification or control of temperature of work, tool or...

72 81, 72 84, 228 60, 29161, B21D 4104

Patent

active

040599779

ABSTRACT:
A method of producing a hermetically sealed, preferably sphere-shaped end in a tubular workpiece, residing, according to the invention, in that an end of a tubular workpiece is heated to a forging temperature and is then reduced until a portion is obtained with a diameter equal to that of a sphere to be obtained. Afterwards, a semi-sphere is subjected to spinning applied to the end of said reduced portion until a hermetically sealed end is formed. This is followed by spinning of a necking portion until a sphere is obtained, the spinning of the constricted portion being carried out as starting from the conjugating line running between the semi-sphere obtained and the reduced portion along the sphere generatrix towards the main portion of the workpiece.

REFERENCES:
patent: 1712118 (1929-05-01), Powers
patent: 2286511 (1942-06-01), Schulenberg

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