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    SHOT PEENING DEVICE
    11.
    发明公开
    SHOT PEENING DEVICE 审中-公开

    公开(公告)号：EP3421176A1

    公开(公告)日：2019-01-02

    申请号：EP17756611.4

    申请日：2017-02-23

    Applicant: NHK Spring Co., Ltd.

    Inventor： OKADA, Hideki ,  YOKOTA, Daisuke ,  MORIYAMA, Senri ,  AKIYAMA, Satoshi ,  KOMAZAKI, Masaya ,  NAGAYASU, Go

    IPC: B24C1/10 ,  B24C3/24 ,  B24C3/32 ,  B24C9/00

    Abstract: A shot peening device (50) includes a turntable (79) which rotates about a revolution axis (X1), holding mechanism (81, 82) which moves with the turntable (79), pressure mechanism (93) which compresses a coil spring (1), rotation mechanism (100) which rotates the coil spring (1), projection mechanism (57) which projects shots to the compressed coil spring (1), load cell (96, 97) which detects a load applied to the coil spring (1), and controller (98). A signal output from the load cell (96, 97) is input to the controller (98), and the controller (98) detects a chronological change of the load applied to the coil spring (1) during the shot peening.

    SUSPENSION SPRING DEVICE AND SUSPENSION COIL SPRING
    12.
    发明公开
    SUSPENSION SPRING DEVICE AND SUSPENSION COIL SPRING 审中-公开
    AUFHÄNGUNGSFEDERVORRICHTUNGUNDAUFHÄNGUNGSSPULENFEDER

    公开(公告)号：EP3150880A1

    公开(公告)日：2017-04-05

    申请号：EP14893187.6

    申请日：2014-05-28

    Applicant: NHK Spring Co., Ltd.

    Inventor： TANGE, Akira ,  OKADA, Hideki

    IPC: F16F1/12 ,  F16F1/00 ,  F16F15/06 ,  F16F15/067

    CPC classification number: B60G11/14 ,  B60G11/16 ,  B60G2202/12 ,  B60G2206/42 ,  B60G2206/81 ,  B60G2206/8402 ,  B60G2206/8403 ,  B60G2500/20 ,  C21D7/06 ,  C21D9/02 ,  F16F1/04 ,  F16F2226/02

    Abstract: A compressive residual stress portion (50) having a compressive residual stress from a surface of a wire (40) to a first depth (D1) is formed between end turn portions (12a, 12b) of a coil spring (12). The end turn portion (12a) includes a first portion (12a 1 ), a second portion (12a 2 ), and a third portion (12a 3 ). The first portion (12a 1 ) is always in contact with a spring seat irrespective of a load applied to the coil spring (12). The second portion (12a 2 ) contacts the spring seat when the load applied to the coil spring (12) is large, and is separated from the spring seat when the load is small. The third portion (12a 3 ) is always separated from the spring seat irrespective of the magnitude of the load. In the end turn portion (12a), in a region including the second portion (12a 2 ), a deep residual stress portion (51) is formed by ultrasonic shot peening. The deep residual stress portion (51) has a compressive residual stress from a surface of the wire (40) to a second depth (D2) deeper than the first depth (D1).

    Abstract translation: 在螺旋弹簧（12）的端部匝部（12a，12b）之间形成有从线（40）的表面到第一深度（D1）的压缩残余应力的压缩残余应力部分（50）。 端部转弯部分（12a）包括第一部分（12a 1），第二部分（12a 2）和第三部分（12a 3）。 第一部分（12a 1）始终与弹簧座接触，而不管施加到螺旋弹簧（12）的负载。 当施加到螺旋弹簧（12）的负载较大时，第二部分（12a 2）接触弹簧座，并且当负载小时与弹簧座分离。 不管负载的大小如何，第三部分（12a 3）始终与弹簧座分离。 在末端转弯部分（12a）中，在包括第二部分（12a 2）的区域中，通过超声波喷丸硬化形成深残余应力部分（51）。 深残余应力部分（51）具有从线（40）的表面到比第一深度（D1）更深的第二深度（D2）的压缩残余应力。

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