Method of peening the inside of a small diameter tube

Details Method of peening the inside of a small diameter tube Method of peening the inside of a small diameter tube

1981-08-31

1984-11-13

Crosby, Gene P.

Metal deforming

By shot-blasting

B21J 500

Patent

active

044818025

ABSTRACT:
A method for peening a portion of the inside of a small diameter heat exchanger tube by inserting a rotating shaft having a peening strip affixed thereto, orbiting and reciprocating the shaft as it rotates, and maintaining this operation for a predetermined length of time to relieve residual tensile stresses in a portion of a tube installed in a heat exchanger.

REFERENCES:
patent: 2423992 (1947-07-01), Nordgren
patent: 2549043 (1951-04-01), Arthur
patent: 3648498 (1972-03-01), Voss
patent: 3696563 (1972-10-01), Rands
patent: 3834200 (1974-09-01), Winter
patent: 3857750 (1974-12-01), Winter
patent: 3871139 (1975-03-01), Rands
patent: 4230426 (1980-10-01), Avery

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