发明申请
US20100327486A1 Manufacturing Method of Cylindrical Member and Manufacturing Method of Vibration Damping Rubber Bushing Having the Cylindrical Member 有权
圆柱形构件的制造方法和具有圆柱形构件的振动阻尼橡胶衬套的制造方法

Manufacturing Method of Cylindrical Member and Manufacturing Method of Vibration Damping Rubber Bushing Having the Cylindrical Member
摘要:
A method of manufacturing a cylindrical member having anti-slip projections formed on axial end faces, the method comprising the steps of: employing a roller die, which is provided with a circumferential die groove of annular form extending through a medial section in a generatrix direction of a die face defined by an integral tapered outside peripheral face, and with a plurality of sloping die grooves extending in a tapered slope direction of the die face situated to both large-diameter and small-diameter sides of the circumferential die groove; providing plastic working to the axial end face with the small-diameter side of the roller die facing towards an inner peripheral side of the cylindrical member and with the large-diameter side facing towards an outer peripheral side, by pushing the die face against the axial end face while rotating circumferentially; and forming simultaneously an annular water barrier projection and the anti-slip projections.
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