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    • 1. 发明申请
    • RING GEAR AND MANUFACTURING METHOD FOR SUCH A RING GEAR
    • 这种环形齿轮的环形齿轮和制造方法
    • WO2005075122A1
    • 2005-08-18
    • PCT/US2005/002625
    • 2005-01-31
    • OYEKANMI, Bamidele, O.
    • OYEKANMI, Bamidele, O.
    • B21D22/00
    • B21K1/305B21K1/30Y10T29/49474Y10T29/49478Y10T74/1987
    • A method of manufacturing a forged article (10) including a surface (18). The method includes defining a negative tooling pattern (52) based on the surface and providing a tooling set (28) having an anvil (30) and top (36)and bottom die (34). An upper surface (40) of the bottom die conforms to the negative tooling pattern. When the tooling is assembled the anvil extends through the bottom die and defines an axis. Additionally, the bottom and top dies cooperate to define a die cavity (76). A hollow blank (38) is preheated and placed on an anvil and into the die. In a single stroke, the hollow blank is pressed between the top and bottom dies in a pressing direction that is parallel to the axis. The preheating temperature Tw is a function of the homologous temperature ratio Tw/Tm is between .62 and .80, where Tm is the absolute melting temperature of the alloy.
    • 一种制造包括表面(18)的锻造制品(10)的方法。 该方法包括基于表面限定负模具图案(52),并提供具有砧座(30)和顶部(36)和底模具(34)的工具组(28)。 底模的上表面(40)符合负模具图案。 当组装工具时,砧座延伸穿过底模并限定一个轴线。 另外,底部和顶部模具配合以限定模腔(76)。 将空心坯料(38)预热并放置在砧座上并进入模具中。 在一个行程中,中空的坯料在平行于轴线的按压方向上被压在顶部和底部模具之间。 预热温度Tw是同温度比Tw / Tm在.62和.80之间的函数,其中Tm是合金的绝对熔融温度。