| 摘要 |
A method is provided for producing a laminated rotor core by stacking circular core pieces. The method comprises a first blanking area, a second blanking area and a third blanking area in the core pieces out of magnetic steel, wherein the first blanking area defines a shape of the core piece (10), the second blanking area defines a shape of a magnet-insertion hole (12), and the third blanking area defines an arbitrary part in the core piece. The method further comprises a step of forming temporary apertures in the second blanking area (12) by forming a thinning part which extends from the temporary aperture to the third blanking area. Thereby resulting in the production of circular core pieces (10) including the thinning part and magnet-insertion holes (12) formed inside the circumferential direction. |
