Method for producing ultra thin wall metallic tube by cold rolling method
US7992417B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 2008 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Oct 17, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C37/30
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An aspect of the present invention provides a method for producing an ultra thin wall metallic tube by a cold rolling method with significant wall thickness reduction. In a method for producing the metallic tube with a cold pilger mill, a wall thickness is reduced to perform elongation while a wall thickness center diameter is expanded using a pair of rolls, which has a tapered groove die whose diameter is gradually expanded or reduced from an engaging inlet side of the roll toward a finishing outlet side thereof, and a tapered mandrel bar, whose diameter is gradually expanded from an engaging inlet side of the tapered mandrel bar toward a finishing outlet side thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.