電磁鋼板の打抜き加工による磁気特性劣化量の推定技術の開発

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2011/07/01

タイトル(英語): Estimation Model for Magnetic Properties of Stamped Electrical Steel Sheet

著者名: 柏原　義之（住友金属工業（株）総合技術研究所），藤村　浩志（住友金属工業（株）総合技術研究所），岡村　一男（住友金属工業（株）総合技術研究所），今西　憲冶（住友金属工業（株）総合技術研究所），屋鋪　裕義（住友金属工業（株）総合技術研究所）

著者名(英語): Yoshiyuki Kashiwara (Corporate Research & Development Lab., Sumitomo Metal Industries, Ltd.), Hiroshi Fujimura (Corporate Research & Development Lab., Sumitomo Metal Industries, Ltd.), Kazuo Okamura (Corporate Research & Development Lab., Sumitomo Metal Industries, Ltd.), Kenji Imanishi (Corporate Research & Development Lab., Sumitomo Metal Industries, Ltd.), Hiroyoshi Yashiki (Corporate Research & Development Lab., Sumitomo Metal Industries, Ltd.)

キーワード: 無方向性電磁鋼板，打抜き加工，解析，塑性ひずみ，応力，磁気特性　　non-oriented electrical steel，stamping，simulation，plastic strain，stress，magnetic properties

要約(英語): Less deterioration in magnetic properties of electrical steel sheets in the process of stamping out iron-core are necessary in order to maintain its performance. First, the influence of plastic strain and stress on magnetic properties was studied by test pieces, in which plastic strain was added uniformly and residual stress was not induced. Because the influence of plastic strain was expressed by equivalent plastic strain, at each equivalent plastic strain state the influence of load stress was investigated. Secondly, elastic limit was determined about 60% of macroscopic yield point (MYP), and it was found to agree with stress limit inducing irreversible deterioration in magnetic properties. Therefore simulation models, where beyond elastic limit plastic deformation begins and magnetic properties are deteriorated steeply, are proposed. Besides considered points in the deformation analysis are strain-rate sensitivity of flow stress, anisotropy under deformation, and influence of stress triaxiality on fracture. Finally, proposed models have been shown to be valid, because magnetic properties of 5mm width rectangular sheets stamped out from non-oriented electrical steel sheet (35A250 JIS grade) can be estimated with good accuracy. It is concluded that the elastic limit must be taken into account in both stamping process simulation and magnetic field calculation.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.131 No.7 （2011） 特集：高周波マイクロ磁気応用技術の最前線

本誌掲載ページ: 567-574 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/131/7/131_7_567/_article/-char/ja/