Process and apparatus for producing a hollow body, and hollow body
US9283602B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2008 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Apr 22, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D41/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for producing a metal hollow body comprising a first axial portion with a first cross-sectional area and a second axial portion with a second cross-sectional area, and in which the two axial portions are connected to one another by means of a shape transition running in the axial direction, the method includes producing a preform body having at least one transition region which extends in the axial direction and is arranged between the first and second axial portions, wherein, in the transition region, the cross-sectional area of the preform body continuously changes from the cross-sectional area of the first axial portion into the cross-sectional area of the second axial portion, accommodating the preform body in a die, a shaping mandrel into the preform body, and axially moving the shaping mandrel to upset the preform body in the die into the final shape of the hollow body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.