MANUFACTURING METHOD OF ROTOR

To provide a manufacturing method of a rotor capable of preventing a decrease in dimensional accuracy of a portion on one side in a direction of a rotation axis than a shaft insertion hole in a shaft while preventing a rotor manufacturing apparatus from becoming large even when performing hydroformi...

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Bibliographic Details
Main Authors HARA YUTAKA, KAWASHIMA TAKAAKI
Format Patent
LanguageEnglish
Japanese
Published 24.09.2020
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Summary:To provide a manufacturing method of a rotor capable of preventing a decrease in dimensional accuracy of a portion on one side in a direction of a rotation axis than a shaft insertion hole in a shaft while preventing a rotor manufacturing apparatus from becoming large even when performing hydroforming.SOLUTION: A manufacturing method of a rotor 100 includes steps of: forming a shaft 20 having a cylindrical shape in which an inner diameter D1 of a first portion 40 is larger than an inner diameter D2 of second portions 50, 60; inserting the shaft 20 into a hole 11a of a rotor core 10; and fixing the shaft 20 to the rotor core 10 by hydroforming.SELECTED DRAWING: Figure 1 【課題】ハイドロフォーミングを行う場合にも、ロータの製造装置が大型化するのを防止しながら、シャフトのうちのシャフト挿入孔よりも回転軸線方向の一方側の部分の寸法精度が低下するのを防止することが可能なロータの製造方法を提供する。【解決手段】このロータ１００の製造方法は、第１部分４０の内径Ｄ１が、第２部分５０および６０の内径Ｄ２よりも大きい円筒形状を有するシャフト２０を形成する工程と、シャフト２０をロータコア１０の孔部１１ａに挿入する工程と、ハイドロフォーミングによって、シャフト２０をロータコア１０に固定する工程とを備える。【選択図】図１
Bibliography:Application Number: JP20190054498