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 having a laminate in which a plurality of annular core plates are laminated includes a core plate forming step of forming a core plate having an annular yoke portion, a laminate forming step for laminating a plurality of core plates with the yoke portions being lined up in an axial direction to configure yokes with the yoke portions, and caulking the plurality of core plates in the axial direction while the plurality of core plates are laminated, thereby forming a plurality of caulked portions at least radially outside of the yokes or at the yokes, and a welding step of welding, along the axial direction, portions of the outer circumferential surface of the laminate which are located radially outside of the plurality of caulked portions.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】複数の環状のコア板が積層された積層体を有する積層コアの製造方法は、環状のヨーク部を有するコア板を形成するコア板形成工程と、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、ヨーク部によって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、ヨークの径方向外方及びヨークの少なくとも一方に、複数の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、複数のかしめ部に対して径方向外方に位置する部分を軸方向に沿ってそれぞれ溶接する溶接工程と、を有する。【選択図】図７