Method for selectively forming (plastic working) at least one region of a sheet metal layer made from a sheet of spring steel, and a device for carrying out this method
US8336359B2 · kind B2 · utility
33Cited by
8References
22Claims
0Family size
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Key dates
| Filing date | Mar 10, 2009 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Sep 27, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49805
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for selectively forming at least one region of a gasket sheet metal layer made of a spring steel, wherein, for the purposes of facilitating the forming process, the region of the sheet metal layer that is to be formed is heated up inductively for reducing the hardness thereof and the electromagnetic alternating field serving for the inductive heating process is concentrated onto the region that is to be formed, wherein the application time of the electromagnetic alternating field on each part of said region of the sheet metal layer that is to be formed amounts to at most approximately 2 seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.