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    • 14. 发明授权
    • Composite brake drum and method for producing same
    • 复合制动鼓及其制造方法
    • US06601284B1
    • 2003-08-05
    • US09639547
    • 2000-08-16
    • Donald R. Wall
    • Donald R. Wall
    • B21B146
    • B22D19/00B22D25/00F16D65/10F16D2065/132F16D2065/1332F16D2069/0483F16D2069/0491F16D2200/0078F16D2250/00F16D2250/0092Y10T29/49988Y10T29/49991
    • A composite brake drum for use in a drum brake assembly includes a one-piece mounting flange and shell and a liner cast integrally in a shell portion thereof. The method for forming the composite brake drum of this invention includes the steps of: (a) providing a generally circular metal blank having an initial pilot hole inner diameter; (b) spin forming the metal blank to produce a one-piece brake drum component defining a center longitudinal axis and including a cylindrical shell having a squealer band which defines a squealer band outer diameter, a mounting flange extending radially inwardly from one end of the shell toward the center longitudinal axis, and an annular lip extending radially inwardly from an opposite end of the shell toward the center longitudinal axis, and wherein the shell, the flange, and the lip cooperate to define a cylindrical mold cavity; (c) subsequent to step (b), centrifugally casting a liner in situ within the mold cavity of the brake drum component to thereby produce the composite vehicle brake drum; and (d) subsequent to step (c), machining the initial pilot hole inner diameter to a final pilot hole inner diameter by locating off of the squealer band outer diameter.
    • 用于鼓式制动器组件的复合制动鼓包括一体式安装法兰和壳体以及一体地铸造在壳体部分中的衬套。 本发明的复合制动鼓的形成方法包括以下步骤:(a)提供具有初始导向孔内径的大致圆形的金属坯料; (b)旋转形成金属坯件以制造限定中心纵向轴线的一体式制动鼓部件,并且包括具有限定鼓轮带外径的尖叫带的圆柱形壳体,从所述滚筒的一端径向向内延伸的安装凸缘 壳体朝向中心纵向轴线,以及环形唇缘,其从壳体的相对端朝向中心纵向轴线径向向内延伸,并且其中壳体,凸缘和唇缘配合以限定圆柱形模腔; (c)在步骤(b)之后,在制动鼓部件的模腔内离心铸造衬套,从而产生复合车辆制动鼓; 和(d)在步骤(c)之后,通过定位离开尖叫带外径的方式将初始导向孔内径加工到最终引导孔内径。