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Title: Method and Apparatus for Peening the Internal Surface of a Non-Ferromagnetic Hollow Part
Author: KM Prewo, P Sainz de Baranda, VC Nardone, Connecti
Source: US Patent 5,950,470
Publication year 1999
Document number: 1999073
Number of pages: 5
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.
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This page last revised: 04/24/2008