Method and apparatus for forming a threaded hole in a hydroformed part
US6931901B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2003 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Jan 19, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/0596
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method and apparatus are disclosed wherein a required threaded hole is formed in a hydroformed part with a single tool while the part remains in a hydroforming die cavity. In forming the threaded hole, a hole is first pierced in the wall of the part and then an annular region of the part extending about the hole is extruded inwardly to form an integral tubular neck defining a hole of predetermined depth. The hole is then expanded in a sizing operation to a diameter determined by the required thread to be formed therein by material displacement and the required thread is then formed in the wall of the hole in a material displacing manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.