Method of manufacturing a valve element having a spherical surfa

Details Method of manufacturing a valve element having a spherical surfa Method of manufacturing a valve element having a spherical surfa

1998-08-27

2000-10-17

Cuda, Irene

Metal working

Method of mechanical manufacture

Valve or choke making

29890127, 2989013, B23P 1500

Patent

active

061312827

ABSTRACT:
A method of manufacturing a valve element with a spherical surface on a tip end thereof by first molding a tip end portion 3 of a material 14 into a truncated cone-like shape and then cold-forging the end portion 3 with a die having a semi-spherical recessed surface thereby to mold a tip end of the end portion 3 into a spherical surface. At this time, the previously truncated cone-like shaped end portion 3, starting with the tapered tip end portion, is pressure-welded to the semi-spherical recessed surface, so that the tip of the material 14 is all plastically deformed along the semi-spherical recessed surface, thereby completing the molding of the spherical surface.

REFERENCES:
patent: 4336920 (1982-06-01), Murray
patent: 4525910 (1985-07-01), Boehmer
patent: 5906046 (1999-05-01), Abplanalp et al.

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