METHOD FOR MANUFACTURING COIL SPRING
    2.
    发明公开
    METHOD FOR MANUFACTURING COIL SPRING 审中-公开
    VERFAHREN ZUR HERSTELLUNG EINER SPULENFEDER

    公开(公告)号:EP2444200A1

    公开(公告)日:2012-04-25

    申请号:EP10789284.6

    申请日:2010-03-18

    CPC classification number: B21F35/00 B21F99/00 B24C1/10

    Abstract: A spring wire (20) is subjected to a first shot peening process (S6) and a second shot peening process (S7). In the first shot peening process (S6), a first shot is projected on the spring wire (20) at a first projectile speed. High kinetic energy of the first shot produces compressive residual stress in a region ranging from the surface of the spring wire (20) to a deep position. In the second spring wire process (S7), a second shot is projected at a second projectile speed lower than the speed of the first shot. The kinetic energy of the second shot is lower than that of the first shot. The low kinetic energy of the second shot increases the compressive residual stress in a region near the surface of the spring wire (20).

    Abstract translation: 对弹簧丝(20)进行第一喷丸硬化处理(S6)和第二喷丸硬化处理(S7)。 在第一喷丸硬化处理(S6)中,以弹射线的第一弹丸速度投射弹簧丝(20)。 第一次射击的高动能在从弹簧丝(20)的表面到深位置的区域中产生压缩残余应力。 在第二弹簧丝加工(S7)中,以比第一弹丸的速度低的第二弹丸速度投射第二射击。 第二枪的动能低于第一枪的动能。 第二次射击的低动能增加了弹簧丝(20)表面附近区域的压缩残余应力。

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