Method for producing a hollow part made of a metal material and use of this method for producing a landing gear rod or beam
US12070782B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2019 |
| Grant date | Aug 27, 2024 |
| Priority date | — |
| Expiry date | Jul 27, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C25/34
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for producing a hollow part made of a metal material, includes preparing a blank of the metal material, and at least a sacrificial mandrel made of a material which has a yield stress in the range from −30% to +20% of the yield stress of the material of the blank; applying a punch on at least one of the ends of the blank in order to produce the expansion of at least a portion of said blank and to create at least one internal space inside said blank; inserting a sacrificial mandrel in said an internal space of the blank; crimping the sacrificial mandrel in said blank; producing, by co-forging, a simultaneous deformation of said blank and of said sacrificial mandrel, with a homothetic ratio K; and performing a machining in order to remove the sacrificial mandrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.