Method and apparatus for peening the internal surface of a non-f

Details Method and apparatus for peening the internal surface of a non-f Method and apparatus for peening the internal surface of a non-f

1998-09-09

1999-09-14

Jones, David

Metal deforming

By shot-blasting

72430, 72707, B21D 2614, B24C 100

Patent

active

059504706

ABSTRACT:
The present invention is a method and apparatus for peening the internal surface of non-ferromagnetic hollow parts. Ferromagnetic peening elements are inserted into the non-ferromagnetic hollow part, and a magnetic dipole creates a magnetic field through the non-ferromagnetic hollow part attracting the peening elements which contact a portion of the internal surface of the non-ferromagnetic hollow part. The magnetic field is disengaged and a second magnetic dipole creates a second magnetic field, thereby causing the peening elements to contact a second portion of the internal surface. The magnetic dipoles are repeatedly turned on and off, thereby causing repeated impact within the interior of the hollow part until the internal surface attains a predetermined stress level.

REFERENCES:
patent: 4039794 (1977-08-01), Kasper
patent: 4080760 (1978-03-01), Leliert
patent: 5509286 (1996-04-01), Coulon
patent: 5813265 (1998-09-01), Shaw et al.
patent: 5829116 (1998-11-01), Vilon

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