| 摘要 |
PROBLEM TO BE SOLVED: To form a hollow part of metallic parts having the hollow part, such as faucet metal tool, in a forging process. SOLUTION: A production method of the metallic parts has at least a process, in which an upper punch is pushed against a blank laid on a space surrounded with dies dividable into plural pieces and a lower punch disposed at the faced position to the upper punch and having a lower punch guide, is retreated against the pushing force of the upper punch to form a deep hole, and a process, in which the retreat of the lower punch guide is regulated and the partition between the upper punch and the lower punch is punched out with the upper punch and the lower punch guides.
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