Patent ID: 6540428
Filing Date: 2003-04-01
Classification: B21D,B21K,B23P,F16H,Y10S,Y10T

Abstract:
A sintered flanged pulley comprising a sintered pulley body and an annular flange caulked to the sintered pulley body, said sintered pulley body having at an end portion thereof an axial annular projection and a stepped portion formed on an outer periphery side of said annular projection, wherein an inner peripheral surface of said annular flange is fitted on said stepped portion of said sintered pulley body, the tip of said annular projection being deformed plastically from the inner periphery side of the annular projection to the outer periphery side thereof by a caulking roller to cause the exposed portion of the tip to have conical surfaces conforming to the surfaces of the caulking roller, said caulking roller having a first conical surface of a first angle in the range of 40Â° to 50Â° and a second conical surface of a second angle in the range of 2Â° to 8Â°, the second conical surface being contiguous to the first conical surface, said first and second conical surfaces being formed on an outer peripheral surface of said caulking roller, and said annular flange is thereby caulked to said sintered pulley body with a first conical surface having an angle in the range of 40Â° to 50Â° and a second conical surface in the range of 2Â° to 8Â°.