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公开(公告)号：US20240229884A9
公开(公告)日：2024-07-11
申请号：US18399940
申请日：2023-12-29
申请人： NHK SPRING CO., LTD.
发明人： Hideki OKADA , Yuichiro YAMAUCHI , Ryo TANAKA , Takeshi SUZUKI , Kosuke SHIBAIRI
CPC分类号： F16F1/042 , B60G11/14 , B60G2204/1244 , F16F2226/023
摘要： According to an embodiment, a coil spring is formed of a wire which is helically wound, and includes an end turn portion and an effective portion, and a surface of the wire in the end turn portion includes an area which is softer than a surface of the wire in the effective portion.
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公开(公告)号：US20180354098A1
公开(公告)日：2018-12-13
申请号：US16107629
申请日：2018-08-21
申请人： NHK SPRING CO., LTD.
发明人： Hideki OKADA , Daisuke YOKOTA , Senri MORIYAMA , Satoshi AKIYAMA , Masaya KOMAZAKI , Go NAGAYASU
IPC分类号： B24C1/10
摘要： A coil spring processing device includes an end positioning device, shot peening device, and controller. The end positioning device positions ends of a coil spring. The shot peening device includes a turntable mechanism, pressure mechanism, rotation mechanism which rotates the coil spring, and projection mechanism which projects shots. Holding mechanisms each include a lower shifting prevention jig and an upper shifting prevention jig. The controller stops a first holding mechanism and a second holding mechanism in rotation stop positions corresponding to end turn portions of the coil spring.
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公开(公告)号：US20240133440A1
公开(公告)日：2024-04-25
申请号：US18399940
申请日：2023-12-29
申请人： NHK SPRING CO., LTD.
发明人： Hideki OKADA , Yuichiro YAMAUCHI , Ryo TANAKA , Takeshi SUZUKI , Kosuke SHIBAIRI
CPC分类号： F16F1/042 , B60G11/14 , B60G2204/1244 , F16F2226/023
摘要： According to an embodiment, a coil spring is formed of a wire which is helically wound, and includes an end turn portion and an effective portion, and a surface of the wire in the end turn portion includes an area which is softer than a surface of the wire in the effective portion.
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公开(公告)号：US20190126706A1
公开(公告)日：2019-05-02
申请号：US16231569
申请日：2018-12-23
申请人： NHK SPRING CO., LTD.
发明人： Akira TANGE , Hideki OKADA
CPC分类号： B60G11/14 , B60G11/16 , B60G2202/12 , B60G2206/42 , B60G2206/81 , B60G2206/8402 , B60G2206/8403 , B60G2500/20 , C21D7/06 , C21D9/02 , F16F1/04 , F16F2226/02
摘要： A method of manufacturing a suspension coil spring includes forming first shot peening indentations on a surface of a wire by projecting first shots toward the wire and forming a compressive residual stress portion to which a compressive residual stress is imparted from the surface of the wire to a first depth, and projecting ball shots as second shots toward a lower end turn portion by an ultrasonic apparatus. A size of each ball shot is larger than a size of each first shot. The method includes forming second shot peening indentations on a surface of the lower end turn portion, and a deep residual stress portion in the lower end turn portion, a compressive residual stress of the deep residual stress portion imparted from the surface of the wire to a second depth that is deeper than the first depth.
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公开(公告)号：US20170349961A1
公开(公告)日：2017-12-07
申请号：US15534470
申请日：2015-12-07
申请人： NHK SPRING CO., LTD.
IPC分类号： 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
CPC分类号： C21D9/0068 , B21D47/00 , B21D53/88 , B24C1/10 , B60G21/055 , B60G2206/724 , B60G2206/8103 , B60G2206/8402 , B60G2206/8403 , C21D1/60 , C21D6/00 , C21D6/004 , C21D6/005 , C21D6/008 , C21D7/06 , C21D8/06 , C21D8/065 , C21D9/00 , C21D9/0075 , C21D9/02 , C21D9/08 , C21D2211/008 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/54 , C22C38/60 , F16F1/02 , F16F1/021 , F16F1/14 , F16F2224/0208 , F16F2226/00
摘要： 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：US20190232462A1
公开(公告)日：2019-08-01
申请号：US16383231
申请日：2019-04-12
申请人： NHK SPRING CO., LTD.
发明人： Senri MORIYAMA , Satoshi AKIYAMA , Masaya KOMAZAKI , Go NAGAYASU , Hideki OKADA , Daisuke YOKOTA
摘要： A coil spring includes a helically formed wire having end turn portions at ends thereof, a plurality of first rough surfaces, each including first shot peening indentations formed on a part of a surface of the end turn portions, and a second rough surface including second shot peening indentations formed on the entire surface of the wire except for the first rough surface. The second rough surface has a surface roughness different from that of the first rough surface.
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公开(公告)号：US20180354097A1
公开(公告)日：2018-12-13
申请号：US16107507
申请日：2018-08-21
申请人： NHK SPRING CO., LTD.
发明人： Hideki OKADA , Daisuke YOKOTA , Senri MORIYAMA , Satoshi AKIYAMA , Masaya KOMAZAKI , Go NAGAYASU
IPC分类号： B24C1/10
摘要： A shot peening device includes a turntable which rotates about a revolution axis, holding mechanism which moves with the turntable, pressure mechanism which compresses a coil spring, rotation mechanism which rotates the coil spring, projection mechanism which projects shots to the compressed coil spring, load cell which detects a load applied to the coil spring, and controller. A signal output from the load cell is input to the controller, and the controller detects a chronological change of the load applied to the coil spring during the shot peening.
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公开(公告)号：US20170349962A1
公开(公告)日：2017-12-07
申请号：US15534472
申请日：2015-12-04
申请人： NHK SPRING CO., LTD.
IPC分类号： 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
CPC分类号： C21D9/0068 , B21D47/00 , B21D53/88 , B24C1/10 , B60G21/055 , B60G2206/427 , B60G2206/724 , B60G2206/81035 , B60G2206/8402 , B60G2206/8403 , C21D1/60 , C21D6/004 , C21D6/005 , C21D6/008 , C21D7/06 , C21D8/065 , C21D9/0075 , C21D9/02 , C21D2211/008 , C22C38/00 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44 , C22C38/54 , C22C38/60 , F16F1/14
摘要： 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：US20170157744A1
公开(公告)日：2017-06-08
申请号：US15434519
申请日：2017-02-16
申请人： NHK SPRING CO., LTD.
发明人： Senri MORIYAMA , Satoshi AKIYAMA , Masaya KOMAZAKI , Go NAGAYASU , Hideki OKADA , Daisuke YOKOTA
摘要： A vertical motion impeller-type shot peening device performs a second shot peening to a coil spring including first shot peening indentations. The vertical motion impeller-type shot peening device includes a workpiece holding mechanism including a lower end turn support and an upper end turn support, a stress applying mechanism which compresses the coil spring, a rotation mechanism, and a projection mechanism which includes a pair of vertically movable impeller units. A first rough surface including first shot peening indentations is formed on a part of end turn portions of the coil spring. A second rough surface including second shot peening indentations is formed on the entire surface of wire except for the first rough surface.
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公开(公告)号：US20150343871A1
公开(公告)日：2015-12-03
申请号：US14789779
申请日：2015-07-01
申请人： NHK SPRING CO., LTD.
发明人： Akira TANGE , Hideki OKADA
IPC分类号： B60G11/14
CPC分类号： B60G11/14 , B60G11/16 , B60G2202/12 , B60G2206/42 , B60G2206/81 , B60G2206/8402 , B60G2206/8403 , B60G2500/20 , C21D7/06 , C21D9/02 , F16F1/04 , F16F2226/02
摘要： A compressive residual stress portion having a compressive residual stress from a surface of a wire to a first depth is formed between end turn portions of a coil spring. The first portion of the end turn portion is always in contact with a spring seat. The second portion contacts the spring seat when the load applied to the coil spring is large, and is separated from the spring seat when the load is small. The third portion is always separated from the spring seat. In the end turn portion, in a region including the second portion, a deep residual stress portion is formed by ultrasonic shot peening. The deep residual stress portion has a compressive residual stress from a surface of the wire to a second depth deeper than the first depth.
摘要翻译： 在螺旋弹簧的端部匝部之间形成有从电线表面到第一深度的压缩残余应力的压缩残余应力部分。 端部转弯部分的第一部分总是与弹簧座接触。 当施加到螺旋弹簧的负载较大时，第二部分接触弹簧座，并且当负载小时与弹簧座分离。 第三部分总是与弹簧座分开。 在末端匝部，在包括第二部分的区域中，通过超声波喷丸硬化形成深残余应力部分。 深残余应力部分具有从线的表面到比第一深度更深的第二深度的压缩残余应力。
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