Title:
METHOD OF MANUFACTURING STATOR CORE AND METHOD OF MANUFACTURING ROTOR CORE
Document Type and Number:
Japanese Patent JP2021093811
Kind Code:
A
Abstract:
To effectively remove oil at a welding scheduled position before of a motor core is formed by welding electromagnetic steel plates.SOLUTION: A laminate 10 formed by electromagnetic steel plates 13a to 13d is a laminate to be a stator core. These electromagnetic steel plates are tightly adhered each other, with oil 15 being adhered to a gap 14 between the electromagnetic steel plates. A welding scheduled position 16 is positioned on an external peripheral surface 11 of the laminate 10. A wide range of the gap 14 about the welding scheduled position 16 is air-blowed, thereby roughly removing the oil 15 from the gap 14. In addition, the welding scheduled position 16 is locally heated. Thus, the oil 15 remaining in the gap 14 is vaporized. Finally, by locally applying a stronger heat to the welding scheduled position 16 by laser, the electromagnetic steel plates are welded to each other. A similar method can be applied to a rotor core as well.SELECTED DRAWING: Figure 1
Inventors:
KUMASAKA YUYA
KANEHARA HIROSHI
KANEHARA HIROSHI
Application Number:
JP2019222412A
Publication Date:
June 17, 2021
Filing Date:
December 09, 2019
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
H02K15/02; H02K1/16; H02K1/28; H02K15/12
Attorney, Agent or Firm:
Ken Ieiri