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    • 3. 发明授权
    • Coil spring for vehicle suspension and method for manufacturing the same
    • 用于车辆悬架的线圈弹簧及其制造方法
    • US08308150B2
    • 2012-11-13
    • US12732450
    • 2010-03-26
    • Akira TangeHideki OkadaIsao SumiyoshiMitsuhiro Sugiyama
    • Akira TangeHideki OkadaIsao SumiyoshiMitsuhiro Sugiyama
    • B60G11/14C21D7/06
    • F16F1/06C21D7/06C21D9/02Y10T29/479Y10T29/49609Y10T29/49611
    • A spring wire with hardness of 50 to 56 HRC is subjected to first and second shot peening processes within a warm working temperature range of 150 to 350° C. In the first shot peening process, the first shot of a shot size of 1.0 mm or more is used. In the second shot peening process, the second shot smaller in shot size than the first shot is used. Through these shot peening processes, compressive residual stress is imparted to the spring wire. The spring wire includes a residual stress increase part, residual stress peak part, and residual stress decrease part. In the residual stress decrease part, a part including the compressive residual stress magnitude of which is equivalent to the magnitude of the compressive residual stress at the surface of the spring wire exists at a position at a depth exceeding the permissible pit depth.
    • 硬度为50〜56HRC的弹簧丝在150〜350℃的温暖​​工作温度范围内进行第一次和第二次喷丸硬化处理。在第一次喷丸硬化处理中,第一次喷丸大小为1.0mm, 更多使用。 在第二次喷丸硬化处理中,使用比第一次投篮更小的投篮尺寸。 通过这些喷丸硬化处理,赋予弹簧丝压缩残余应力。 弹簧丝包括残余应力增加部分,残余应力峰部分和残余应力减少部分。 在残余应力减少部分中,包括其压缩残余应力大小等于在弹簧丝表面处的压缩残余应力的大小的部分存在于超过允许凹坑深度的深度的位置处。