METHOD FOR MANUFACTURING LAMINATED CORE AND LAMINATED CORE

• Main Authors: HATTORI YOSHIHIRO, NANRI TOMOHIRO, SAKAI HIDENORI
• Format: Patent
• Language: English; Japanese
• Published: 15.01.2024
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

To provide a method for manufacturing a laminated core with little variation in the length thereof in an axial direction depending on a circumferential position.SOLUTION: A method for manufacturing a laminated core includes a core plate forming step of forming a core plate having an annular yoke portion and a protrusion portion protruding radially outward from the yoke portion, a laminate forming step of laminating a plurality of core plates with the protrusion portions and yoke portions being lined up in an axial direction to configure ear portions with the protrusion portions and yokes with the yoke portions, and caulking the plurality of core plates in the axial direction while the core plates are laminated, thereby forming ear caulked portions radially inside of the ear portions or at the ear portions in the yokes, and a welding step of welding the outer circumferential surfaces of the ear portions out of the outer circumferential surface of a laminate along the axial direction.SELECTED DRAWING: Figure 7 【課題】周方向位置による積層コアの軸方向の長さのばらつきが少ない積層コアの製造方法を提供する。【解決手段】環状のヨーク部及びヨーク部から径方向外方に突出する突出部を有するコア板を形成するコア板形成工程と、突出部及びヨーク部が軸方向に並んだ状態でコア板を複数積層することにより、突出部による耳部及びヨーク部によるヨークを構成するとともに、コア板を複数積層した状態で軸方向にかしめることにより、ヨークにおいて耳部に対して径方向内方又は耳部に耳かしめ部を形成する積層体形成工程と、積層体の外周面のうち耳部の外周面を軸方向に沿って溶接する溶接工程と、を有する。【選択図】図７