公开(公告)号：US10808784B2

公开(公告)日：2020-10-20

申请号：US16086812

申请日：2017-03-07

Applicant: NHK Spring Co., Ltd.

Inventor： Yoshiki Ono ,  Kazuhiko Konomi ,  Takamichi Sano ,  Masaru Imamura ,  Toshiaki Maruichi

IPC: F16F1/366 ,  F16F1/06 ,  C08J5/04 ,  B29C70/06 ,  F16F1/14 ,  B29K307/04 ,  B29L31/00

Abstract: The coil spring according to the present invention is a coil spring that is formed by spirally winding a wire rod and that includes a core that is elastically deformable and a reinforced fiber layer including reinforcing fibers wound around an outer circumference of the core and a thermoset resin that firmly adheres the reinforcing fibers to one another, wherein, in at least a part of a surface layer of the reinforced fiber layer, a content percentage of the reinforcing fibers on an inner circumferential side of the coil spring is larger than a content percentage of the reinforcing fibers on an outer circumferential side of the coil spring.

公开(公告)号：US09803269B2

公开(公告)日：2017-10-31

申请号：US14412567

申请日：2013-06-28

Applicant: NHK Spring Co., Ltd. ,  Tohoku University

Inventor： Hiroaki Matsumoto ,  Akihiko Chiba ,  Sang-Hak Lee ,  Yoshiki Ono

IPC: C22F1/18 ,  C22C14/00 ,  C22F1/00

CPC classification number: C22F1/183 ,  C22C14/00 ,  C22F1/00

Abstract: The present invention provides an α+β type titanium alloy and a production method therefor, which has an ultrafine structure causing superplasticity under low temperatures and has a high deformation ratio compared to conventional α+β type Ti alloys. The alloy has an ultrafine structure made of equiaxial crystals in which an area ratio of crystals having a grain diameter of 1 μm or less is 60% or more, and maximum frequency grain diameter is 0.5 μm or less, wherein a portion in which the integration degree of plane orientation of the hexagonal close-packed crystal is 1.00 or more exists within a range of 0 to 60 degrees with respect to a normal line of a processed surface of the alloy.

公开(公告)号：US11378147B2

公开(公告)日：2022-07-05

申请号：US16559137

申请日：2019-09-03

Applicant: NHK SPRING CO., LTD.

Inventor： Takeshi Suzuki ,  Yoshiki Ono ,  Shimpei Kurokawa ,  Kosuke Shibairi

IPC: F16F1/02 ,  C21D9/02 ,  C22C38/04 ,  C22C38/02 ,  C21D7/06 ,  C21D1/18 ,  C22C38/18 ,  C21D8/06 ,  B24C1/10

Abstract: A spring consists of, by mass %, 0.5 to 0.7% of C, 1.0 to 2.0% of Si, 0.1 to 1.0% of Mn, 0.1 to 1.0% of Cr, not more than 0.035% of P, not more than 0.035% of S, and the balance of Fe and inevitable impurities. The spring has a structure including not less than 65% of bainite and 4 to 13% of residual austenite by area ratio in a cross section. The spring has a compressive residual stress layer in a cross section from a surface to a depth of 0.35 mm to D/4, in which D (mm) is a circle-equivalent diameter of the cross section. The spring has a high hardness layer with greater hardness than a center portion by 50 to 500 HV from a surface to a depth of 0.05 to 0.3 mm.

公开(公告)号：US20190063536A1

公开(公告)日：2019-02-28

申请号：US16086812

申请日：2017-03-07

Applicant: NHK Spring Co., Ltd.

Inventor： Yoshiki Ono ,  Kazuhiko Konomi ,  Takamichi Sano ,  Masaru Imamura ,  Toshiaki Maruichi

IPC: F16F1/06 ,  C08J5/04 ,  F16F1/366 ,  F16F1/14 ,  B29C70/06

Abstract: A coil spring includes: a core that is elastically deformable; and a reinforced fiber layer including reinforced fibers wound around an outer circumference of the core, and a thermoset resin that firmly adheres the reinforced fibers to one another. In at least a part of a surface layer of the reinforced fiber layer, a content percentage of the reinforced fibers on an inner circumferential side of the coil spring is larger than a content percentage of the reinforced fibers on an outer circumferential side of the coil spring.

公开(公告)号：USD828808S1

公开(公告)日：2018-09-18

申请号：US29568306

申请日：2016-06-16

Applicant: NHK SPRING CO., LTD.

Designer： Yohei Kameda ,  Yoshiki Ono ,  Kazuhisa Matsumoto

公开(公告)号：US09920403B2

公开(公告)日：2018-03-20

申请号：US14395121

申请日：2013-03-29

Applicant: NHK SPRING CO., LTD.

Inventor： Yuji Araoka ,  Tohru Shiraishi ,  Yoshiki Ono

IPC: C22C23/06 ,  B22F3/10 ,  B22F3/20 ,  B22F3/24 ,  B22F5/12 ,  C22C23/00 ,  C22C1/02 ,  C22F1/06 ,  B22D11/00 ,  B22D21/00 ,  C22C23/02 ,  C22C1/04 ,  B22D11/06 ,  B21C23/00 ,  C21D7/06 ,  C21D8/06 ,  C21D7/00

CPC classification number: C22C23/06 ,  B21C23/001 ,  B21C23/005 ,  B22D11/005 ,  B22D11/0611 ,  B22D21/007 ,  B22F3/10 ,  B22F3/20 ,  B22F3/24 ,  B22F5/12 ,  B22F2998/10 ,  C21D7/00 ,  C21D7/06 ,  C21D8/06 ,  C22C1/02 ,  C22C1/0408 ,  C22C23/00 ,  C22C23/02 ,  C22F1/06 ,  Y02P10/212 ,  Y10T428/12 ,  Y10T428/12993 ,  B22F9/08 ,  B22F3/17 ,  B22F2003/166 ,  B22F3/18

Abstract: A high-strength magnesium alloy member is suitable for products in which at least one of bending stress and twisting stress primarily acts. The member has required elongation and 0.2% proof stress, whereby strength and formability are superior, and has higher strength and large compressive residual stress in the vicinity of the surface of a wire rod. In the magnesium alloy member formed as a wire rod in which at least one of bending stress and twisting stress primarily acts, the wire rod includes a surface portion having the highest hardness of 170 HV or more in the vicinity of the surface and an inner portion having a 0.2% proof stress of 550 MPa or more and an elongation of 5% or more, and the wire rod has the highest compressive residue stress in the vicinity of the surface of 50 MPa or more.

公开(公告)号：US20150104669A1

公开(公告)日：2015-04-16

申请号：US14395121

申请日：2013-03-29

Applicant: NHK SPRING CO., LTD.

Inventor： Yuji Araoka ,  Tohru Shiraishi ,  Yoshiki Ono

IPC: C22C23/06 ,  C22C23/00 ,  B22F3/20 ,  B22F5/12 ,  B22F3/10 ,  B22F3/24

CPC classification number: C22C23/06 ,  B21C23/001 ,  B21C23/005 ,  B22D11/005 ,  B22D11/0611 ,  B22D21/007 ,  B22F3/10 ,  B22F3/20 ,  B22F3/24 ,  B22F5/12 ,  B22F2998/10 ,  C21D7/00 ,  C21D7/06 ,  C21D8/06 ,  C22C1/02 ,  C22C1/0408 ,  C22C23/00 ,  C22C23/02 ,  C22F1/06 ,  Y02P10/212 ,  Y10T428/12 ,  Y10T428/12993 ,  B22F9/08 ,  B22F3/17 ,  B22F2003/166 ,  B22F3/18

Abstract: A high-strength magnesium alloy member is suitable for products in which at least one of bending stress and twisting stress primarily acts. The member has required elongation and 0.2% proof stress, whereby strength and formability are superior, and has higher strength and large compressive residual stress in the vicinity of the surface of a wire rod. In the magnesium alloy member formed as a wire rod in which at least one of bending stress and twisting stress primarily acts, the wire rod includes a surface portion having the highest hardness of 170 HV or more in the vicinity of the surface and an inner portion having a 0.2% proof stress of 550 MPa or more and an elongation of 5% or more, and the wire rod has the highest compressive residue stress in the vicinity of the surface of 50 MPa or more.

Abstract translation: 高强度镁合金构件适用于主要作用弯曲应力和扭转应力中的至少一种的产品。 该构件需要伸长率和0.2％屈服应力，其强度和成形性优异，并且在线材表面附近具有较高的强度和较大的压缩残余应力。 在形成为弯曲应力和扭转应力中的至少一个主要作用的线材的镁合金构件中，线材包括在表面附近具有最高硬度为170HV或更高的表面部分， 具有550MPa以上的0.2％屈服应力和5％以上的伸长率，并且线材在表面附近具有最高的压缩残余应力为50MPa以上。

公开(公告)号：US09570948B2

公开(公告)日：2017-02-14

申请号：US14785168

申请日：2014-04-15

Applicant: NHK SPRING CO., LTD.

Inventor： Yohei Kameda ,  Kazuo Iwata ,  Yuji Araoka ,  Yoshiki Ono

IPC: H02K1/27 ,  H02K15/03 ,  H02K29/03

CPC classification number: H02K1/276 ,  H02K1/27 ,  H02K1/2766 ,  H02K15/03 ,  H02K29/03

Abstract: A magnet plate used for a rotor core of a motor, includes a magnetic pole portion being set between an outer peripheral edge of a body portion and a magnet slot and having a radial width being smaller than a radial sectional width of the permanent magnet, and a higher hardness portion being formed into a hook shape along an end corner of the magnet slot and have a smaller width than the radial sectional width of the permanent magnet.

Abstract translation: 用于电动机的转子铁芯的磁板包括设置在主体部分的外周边缘和磁体槽之间并具有小于永磁体的径向截面宽度的径向宽度的磁极部分，以及 较高的硬度部分沿着磁体槽的端角形成钩状并且具有比永磁体的径向截面宽度更小的宽度。

公开(公告)号：USD828809S1

公开(公告)日：2018-09-18

申请号：US29568307

申请日：2016-06-16

Applicant: NHK SPRING CO., LTD.

Designer： Yohei Kameda ,  Yoshiki Ono ,  Kazuhisa Matsumoto

公开(公告)号：US09752636B2

公开(公告)日：2017-09-05

申请号：US14427106

申请日：2013-09-05

Applicant: NHK SPRING CO., LTD.

Inventor： Yuitirou Ono ,  Tohru Shiraishi ,  Yoshiki Ono ,  Keita Takahashi

IPC: F16F1/02 ,  B21F3/02 ,  B21F35/00 ,  C21D7/06 ,  C21D9/02 ,  C23C8/22 ,  C23C8/80 ,  C21D1/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/08 ,  C22C38/12 ,  C22C38/18 ,  B24C1/10 ,  C21D6/00 ,  C21D8/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/34 ,  C22C38/46 ,  C23C8/02 ,  F16F1/06

CPC classification number: F16F1/021 ,  B21F3/02 ,  B21F35/00 ,  B24C1/10 ,  C21D1/06 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D7/06 ,  C21D8/065 ,  C21D9/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/34 ,  C22C38/46 ,  C23C8/02 ,  C23C8/22 ,  C23C8/80 ,  F16F1/06 ,  F16F2224/0216 ,  F16F2226/00 ,  F16F2236/04 ,  F16F2238/026

Abstract: The coil spring includes steel wire material containing 0.45 to 0.80 weight % of C, 0.15 to 2.50 weight % of Si, 0.3 to 1.0 weight % of Mn and iron and inevitable impurities as the remainder, and having a circle equivalent diameter of 2.5 mm to 10 mm, in which internal hardness at a freely selected cross section of the wire material is in a range of 570 to 700 Hv, C-condensed layer which exceeds average concentration of C contained in the steel wire material exists at surface layer part, and in an approximate maximum principal stress direction generated when a compressive load is loaded on spring of inner diameter side of the coil spring of the wire material, unloaded compressive residual stress at a depth of 0.2 mm and 0.4 min from surface of the wire material is not less than 200 MPa and not less than 60 MPa, respectively.