| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a bearing cap used for an internal combustion engine, with powder metallurgy superior in dimensional accuracy and production efficiency, and provide the same. SOLUTION: This manufacturing method comprises manufacturing a green compact of the bearing cap, which has several convex threads on the surface to be engaged with a side wall having rectangular recess parts of a cylinder block, then sintering it, and positively sizing ridgelines of the several convex threads when sizing the sintered compact. The manufacturing method also comprises simultaneously sizing the several sintered compacts, in the above sizing step.
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