| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a shaft member of a rolling bearing for a wheel capable of reducing cost by reducing the number of times of cold forging and a forging mold device needed for the cold forging. <P>SOLUTION: An annealed shaft-shape raw material 61 is formed by annealing a shaft-shape raw material 60 comprising a structural carbon steel. A coated shaft-shape raw material 62 is formed by coating the surface of the annealed shaft-shape raw material 61 with lubricating agent. A cold forged article 64 integrally having a shaft part 10, a fitting shaft part 30, and a flange part 21 is formed by cold forging the coated shaft-shape raw material 62. A turned forged article 65 is formed by turning a part of the cold forged article 64. A heat treated forged article 66 by heat treating the turned forged article 65. The shaft member 1 of the rolling bearing for the wheel is formed by grinding the inner wheel track surface 18 in the outer peripheral surface of the shaft part 10 of the heat treated forged article 66. <P>COPYRIGHT: (C)2012,JPO&INPIT |
