| 摘要 |
PROBLEM TO BE SOLVED: To provide a connecting rod hardened only at a specified position, and a method and a device for manufacturing the connecting rod. SOLUTION: This connecting rod manufacturing device is formed such that when the outline of the connecting rod is formed by forging a steel for machine structural use, the connecting rod is heated to a temperature of approximately 750°C, and the areas of the connecting rod near a small end part 3 and a large end part 4 are clampingly held by a small end tool 8 and a large end tool 9 in the thickness direction. A first air blow tube 13 is formed at the large end tool 8 and a second air blow tube 18 is formed at the large end tool 9. Air shown by the arrow A can be sent out from the first air blow tube and air shown by the arrow B can be sent from the second air blow tube. The connecting rod manufacturing device is formed such that, when the connecting rod is held by the small end tool 8 and the large end tool 9, the air shown by the arrows A and B is sent out, cooling water is sprayed by a shower over the range of a column part 2, and the connecting rod is quenched so that that range can be transformed to a martensitic structure. COPYRIGHT: (C)2005,JPO&NCIPI
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