Installation for the detensioning of expanded tubes, particularly in a heat exchanger
US4821545A · kind A · utility
5Cited by
4References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 28, 1987 |
| Grant date | Apr 18, 1989 |
| Priority date | — |
| Expiry date | May 28, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/479
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Detensioning of expanded tubes is brought by way of an installation using a rotopeening method. The tool is constituted by a cage moved along a helical path centered on the axis of the tube to be treated. The cage supports in rotary manner a shaft, whose axis is parallel and offcentered with respect to that of the cage. The shaft carries flexible plates, called brushes, whose ends are equipped with shot able to peen the inner wall of the tube during the rotation of the shaft. The helical path ensures a regular distribution of the impacts and consequently a uniform treatment of the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.