Tube expanding apparatus
US8276261B2 · kind B2 · utility
9Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2010 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | May 4, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53943
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a state where the expanded protruding portion of the heat-exchanging tube, which has been expanded inside a grip portion of a chucking sleeve whose diameter has been reduced by a clamp bushing, is gripped by the grip portion, a tube expanding billet is inserted into a yet-unexpanded part of the heat-exchanging tube to cause tube expansion. When doing so, a guide portion, which is formed on a flare punch and has the same diameter as the maximum outer diameter of the tube expanding billet, is inserted inside the expanded protruding portion of the heat-exchanging tube gripped by the grip portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.