Method for producing a formed part furnished with a through hole
US9545660B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2010 |
| Grant date | Jan 17, 2017 |
| Priority date | — |
| Expiry date | Jan 14, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K1/761
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In order to produce a formed part furnished with a through hole, a rod material is advanced by a defined length in the direction of its lengthwise extension into a forming die through a stationary guide and then immobilised by a clamping arrangement that engages with it circumferentially. The end portion of the rod material is then axially swaged by a swaging tool and is thus shaped into a disc, the circumference of which is defined by the forming die. The disc is then penetrated axially by a dishing tool and impact extruded at the same time, the displaced material flowing between the dishing tool and the inner circumferential wall of the forming die. The formed part located in the forming die is then rotated coaxially relative to the rest of the rod material and thereby separated from the rest of the rod material by torsion shearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.