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公开(公告)号：US11111554B2
公开(公告)日：2021-09-07
申请号：US15534472
申请日：2015-12-04
Applicant: NHK SPRING CO., LTD.
Inventor： Shinichiro Kuwatsuka , Yurika Okudaira , Akira Tange , Hideki Okada , Ken Takahashi
IPC: C21D9/00 , B21D47/00 , C22C38/42 , C22C38/04 , C22C38/02 , C22C38/00 , C22C38/44 , B21D53/88 , C21D8/06 , C21D7/06 , C21D6/00 , C21D1/60 , B60G21/055 , B24C1/10 , C22C38/54 , F16F1/14 , C22C38/60 , C21D9/02
Abstract: A stabilizer formed by using a metal bar having a solid structure and configured to reduce a displacement between right and left wheels, including a torsion part extending in a vehicle width direction, being capable of a torsional deformation, and having a diameter of 10 to 32 mm, is provided. The stabilizer has a chemical composition containing at least C: 0.15% by mass or more to 0.39% by mass or less, Mn, B, and Fe, and also has a metal structure 90% or more of which is a martensite structure.
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公开(公告)号：US10995382B2
公开(公告)日：2021-05-04
申请号：US15534470
申请日：2015-12-07
Applicant: NHK SPRING CO., LTD.
Inventor： Shinichiro Kuwatsuka , Yurika Okudaira , Akira Tange , Hideki Okada , Ken Takahashi
IPC: C21D9/00 , B21D53/88 , B24C1/10 , C21D1/60 , C21D6/00 , B21D47/00 , C21D8/06 , C22C38/00 , C22C38/54 , C22C38/44 , C22C38/42 , C22C38/04 , C22C38/02 , C21D7/06 , F16F1/02 , F16F1/14 , B60G21/055 , C22C38/60 , C21D9/02 , C21D9/08
Abstract: The invention provides a production method for stabilizers which produces with high productivity in a compact production line, without tempering. The production method for stabilizers of the invention includes: forming a steel bar material containing at least C: 0.15 wt % to 0.39 wt %, Mn, B and Fe into a product shape by bending; and quenching the bent steel bar material in a medium having a heat transfer coefficient higher than or close to that of water.
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公开(公告)号：US10549594B2
公开(公告)日：2020-02-04
申请号：US15528047
申请日：2015-11-10
Applicant: NHK SPRING CO., LTD.
Inventor： Hidenori Chihara , Hiroto Tsuji , Shinichiro Kuwatsuka
Abstract: A leaf spring device includes a main leaf made of a steel plate including an elastic section configured to generate elastic force when bent; and an eye section formed in an end portion of the elastic section, the elastic section and the eye section being tempered. There is also provided a method for manufacturing the leaf spring device. The eye section is formed by rolling the end of the elastic section into a circular form. The eye section is tempered at a higher temperature than the elastic section.
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