Means of improving gear life

Details Means of improving gear life Means of improving gear life

1978-06-12

1979-09-18

Hall, Carl E.

Metal deforming

By shot-blasting

C21D 706

Patent

active

041678648

ABSTRACT:
Disclosed herein is a process of compression stressing a metal workpiece having a body with a central bore so as to produce a residual compressive stress in the workpiece to increase the fatigue strength of the workpiece. The process includes the steps of forcing the workpiece onto a mandrel to induce an initial tensile stress in the body, thereafter inducing a compressive stress in the surface of the workpiece by shot blast treatment of the surface of the workpiece, and thereafter separating the workpiece from the mandrel to increase the compressive stress in the surface of the workpiece.

REFERENCES:
patent: 1585989 (1926-05-01), Higginson
patent: 2542955 (1951-02-01), Young
patent: 3073022 (1963-01-01), Bush
patent: 4034585 (1977-07-01), Straub

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