| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylindrical shaft having excellent circularity of its surface and excellent straightness in an axial direction, and the manufacturing method of the cylindrical shaft. SOLUTION: A plurality of projecting portion 13 and recessed portions 14 including a portion with larger width as separated from ends when viewed from the radial direction of a cylindrical shaft 10 are alternately arranged at a pair of ends 12, 12' with a metallic plate 11 joined thereto along the axial direction of the cylindrical shaft, and the projecting portions 13 and the recessed portions 14 are press-fitted to each other in the radial direction of the cylindrical shaft 10 by providing a press-fitting margin 15 between the projecting portions 13 and the recessed portions 14. Firstly, both ends having the projecting portions 13 and the recessed portions 14 are bent in an arc shape when viewed from the axial direction of the cylindrical shaft, a center portion is bent in an arc shape when viewed in the axial direction of the cylindrical shaft, and the projecting portions and the recessed portions at both ends are press-fitted in the radial direction and formed in a cylindrical shape. COPYRIGHT: (C)2007,JPO&INPIT |
