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    • 1. 发明授权
    • Wave-processing method and wave-processing die for core metal of wet friction material
    • 用于湿摩擦材料芯金属的波浪加工方法和波浪加工模具
    • US06948350B2
    • 2005-09-27
    • US10736980
    • 2003-12-17
    • Hideo OnoHideto NakagawaKatsuhiro Yamamoto
    • Hideo OnoHideto NakagawaKatsuhiro Yamamoto
    • B21D13/02B21D28/00C21D7/04
    • B21D13/02Y10T29/49609
    • A ring-shaped core metal is pressed and compressed by a main punch and a counter punch so as to have a wave shape. Moreover, each group of three micro-protrusions provided on each of top points of the wave shape are cut in the core metal. Then, three notches are cut on the core metal corresponding to the micro-protrusions. Furthermore, plastic flow is generated at a surface layer of the core metal due to partial compression by the notches at the time of pressing and compressing. Then, the waves are formed on the core metal with the notches as the top points. The notches are cut at seven sections respectively on a front surface and a rear surface of the core metal. Thus, seven waves are formed on the core metal in total. Since the notches are formed on the front and the rear surfaces of the waves, a “return” phenomenon is not generated as seen in a conventional cool working method. Thus, the waves are formed at high accuracy.
    • 环形芯金属被主冲头和反冲头压制并压缩成波形。 此外,在芯金属中切割设置在波形的每个顶点上的每组三个微突起。 然后,在对应于微突起物的芯金属上切割出三个切口。 此外,在压制和压缩时由于缺口的部分压缩而在芯金属的表面层产生塑性流动。 然后,以切口为顶点的芯金属上形成波。 切口在芯金属的前表面和后表面上分别切成七个部分。 因此,总共在芯金属上形成七个波。 由于凹槽形成在波浪的前表面和后表面上,所以如常规的冷加工方法所示,不会产生“返回”现象。 因此,以高精度形成波。