Manufacturing method for laminated iron core
US11355282B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2017 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Jun 15, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K15/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A manufacturing method for a laminated iron core includes conveying a sheet steel strip in an intermittent manner in a lift up state, with upward movement of the strip being limited by a guiding member provided on a lower holder; punching an outer shape of each iron core laminae; and applying adhesive agent to a surface of the strip before the punching. The adhesive agent is applied in a state in which a pilot pin is inserted in a pilot hole of the strip and when the strip is about to be pressed against or is being pressed against the die plate by a stripper provided on an upper holder. After application of the adhesive agent, the strip is returned to the lift up state by raising the upper holder, with a lifter and the stripper plate being in abutment with the lower and upper surfaces of the strip, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.