Method and apparatus for peening the internal surface of a non-ferromagnetic hollow part
US5950470A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Sep 9, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S72/707
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.