Patent ID: 8220153
Filing Date: 2012-07-17
Classification: B21K,B22F,B23P,F16C,Y10T

Abstract:
1. A production method for complex bearings, comprising: preparing an outer member consisting of an Fe-based sintered material and a cylindrical sintered bearing member consisting of a Cu-based sintered material, the outer member comprising a fitting hole having: the sintered bearing member comprising an outer diameter allowing a clearance fit of the sintered bearing member into the fitting hole of the outer member; inserting the sintered bearing member into the fitting hole of the outer member and inserting a columnar core rod into an inner peripheral surface of the sintered bearing member; and compressing the sintered bearing member in an axial direction, wherein by the compressing, plastic deformation occurs in the sintered bearing member such that a material of the sintered bearing member flows toward a peripheral side thereof, and an expanding peripheral surface of the sintered bearing member is pressed onto the inner peripheral surface of the fitting hole of the outer member, and the outer member and the sintered bearing member are thereby integrated with each other, and the inner peripheral surface of the sintered bearing member is pressed onto the columnar core rod, and a hole size of the fitting hole of the sintered bearing member is thereby adjusted.