| 摘要 |
PROBLEM TO BE SOLVED: To improve the sliding performance of a sintered metal component by increasing the feeding performance of lubricating oil in the sliding face of the sintered metal component and further polishing the sliding face without leaving foreign matter. SOLUTION: An inner ring used for a torque limiter is produced through: a stage (a) where raw material powder is subjected to powder compaction; a stage (b) where the powder-compacted body is sintered; a stage (c) where the sintered compact is subjected to sizing; a stage (d) where the sintered compact is subjected to heat treatment; a stage (e) where the sintered compact is subjected to barrel polishing by mutual rubbing; and a stage (f) where the sintered compact is impregnated with lubricating oil. In the barrel polishing stage by mutual rubbing (e), a plurality of sintered compacts are charged to the inside of a barrel type vessel, and the barrel type vessel is rotated or reciprocated along the rotary shaft, thus a mutual polishing action is applied to the sintered compacts in the vessel, and the surfaces of the sintered compacts including sliding faces are polished. Simultaneously, the sintered compacts are mutually collided each other, so as to form recessed parts on the sliding faces of the sintered compacts as deformed marks caused by the collision. COPYRIGHT: (C)2009,JPO&INPIT
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