| 摘要 |
PROBLEM TO BE SOLVED: To provide a sintered body securing high dimension accuracy while having an outer circumference shape in which a cross section shape is a non true circle shape by applying accurate sizing even on the sintered body for a sintered bearing or the like having the outer circumference shape. SOLUTION: This sizing device 1 for the sintered bearing includes a die 3 having a holding hole 2 holding the sintered bearing W having the outer circumference shape in which the cross section shape is a non true circle shape, a core shaft 4 inserted in an inner circumference surface of the sintered bearing W held in the holding hole 2, and an upper punch 5 and a lower punch 6 pressing the sintered bearing W held in the holding hole 2 from an up-and-down direction. The die 3 includes a fixed part 7 and a movable pressing part 8. The movable pressing part 8 forms a holding hole 2 and is divided into a plurality of parts in a circumference direction. The holding hole 2 is expanded and contracted by movement of each divided parts. COPYRIGHT: (C)2011,JPO&INPIT
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