Process for modifying capillary grooves

Details Process for modifying capillary grooves Process for modifying capillary grooves

1975-08-28

1977-01-25

Larson, Lowell A.

Metal deforming

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

Spherical tool

72123, 165133, B21D 5306

Patent

active

040044416

ABSTRACT:
The process of passing a rotating tool through a tubular workpiece such as a heat pipe having longitudinal capillary grooves in the walls thereof such that a swaging ball carried by the tool flattens the lands between the grooves to thereby produce a capillary configuration in which the width of the opening of the grooves is narrower than a cross-section of the groove and the lands between the grooves have a mushroom-shaped cross-section. Deformation of the lands by the swaging ball is essentially of a limited-load point-contact type to avoid a destructive collapse of the lands during the swaging process.

REFERENCES:
patent: 246346 (1881-08-01), Scheermesser
patent: 1273475 (1918-07-01), Foster
patent: 2779222 (1957-01-01), Edwards
patent: 3468020 (1969-09-01), Carlson et al.
patent: 3768290 (1973-10-01), Zatell

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