| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of easily manufacturing a sintered bearing in which a generating line on the axial cross section of an inner peripheral surface forms a convex curve on the inner diameter side. SOLUTION: When a green compact relatively low in density of an axial center part and relatively high in density of both axial ends is sintered, a sintered body 7 after sintered has a larger dimensional change (a dimensional change when sintered) at both axial ends with relatively high density compared with the axial center part with relatively low density. The inner peripheral surface 7a of the sintered body 7 is shaped such that the generating line on the axial cross section forms the convex curve on the inner diameter side by the difference of dimensional changes when sintered caused by the density difference. COPYRIGHT: (C)2008,JPO&INPIT
|
