Method of hardening shaped surfaces by plastic deformation

Details Method of hardening shaped surfaces by plastic deformation Method of hardening shaped surfaces by plastic deformation

1982-05-11

1984-06-12

Larson, Lowell A.

Metal deforming

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

Spherical tool

72710, 140 89, B21F 3500

Patent

active

044533926

ABSTRACT:
A method of hardening by plastic deformation surfaces of articles shaped as continuous helical coils and having essentially round cross-section by means of deforming elements wherein said deforming elements are arranged at the opposite sides of said article for forced rotation in engagement with the surface of the material of said article, while said article is rotated about its longitudinal centerline and subjected to ultrasonic oscillations. The deforming elements are rotated in opposite directions so as to form on the surface of said article a regular microrelief in the form of an intersecting mesh-like pattern. By changing the ratio between the angular rotational velocities of the deforming elements, a microrelief of desired geometry is attained.

REFERENCES:
patent: 3735615 (1973-05-01), Shneider

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