Method for producing laminated iron cores
US5539974A · kind A · utility
14Cited by
0References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 16, 1994 |
| Grant date | Jul 30, 1996 |
| Priority date | — |
| Expiry date | Jun 16, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49012
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for producing laminated iron cores, in which at least one of a semi-stator sheet piece and a semi-rotor sheet piece is subjected to a pressing operation in a sheet thickness direction to be extended inwardly radially and outwardly radially and to make large a blanking width, so that, when the semi-stator sheet piece is subjected at its inner peripheral edge portion to a blanking operation and the semi-rotor sheet piece is subjected at its outer peripheral edge portion to a blanking operation, generation of `scum riser` phenomenon or the like can be prevented in advance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.