Method for stamping a part from a multi-layered strip
US6401510B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1999 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Jun 25, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/8832
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of stamping a part from an elongated strip of multi-layered material. The multi-layered material includes a viscoelastic intermediate layer, and upper and lower layers that are relatively rigid with respect to the intermediate layer. The method includes providing symmetrically aligned top and bottom punches each including a material displacement edge corresponding with a desired shape of the part. Each of the material displacement edges are defined by a rake surface and a part interface surface that combine to form a positive rake angle. The strip is positioned between the top and bottom punches. The top and bottom punches then shear a portion of the upper and lower layers, respectively. More particularly, symmetrical groove patterns are formed in the upper and lower layers, defining a perimeter of the part. The part is then removed from the strip along the perimeter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.