| 摘要 |
A press working apparatus is provided with a first working unit and a second working unit 14 . In the first working unit, a first stage is performed for forming a half-blanked portion 15 with a projecting shape at a region where a through hole P is to be formed in a sheet W. In the second working unit 14 , a second stage S 2 is performed in which the half-blanked portion 15 is blanked from the sheet W by a second punch 26 and a second die 23 . Also in the second stage S 2 , when a blanked body is blanked from the sheet W, shaving work is performed with respect to a side wall surface Pa on a region of the sheet W where the blanked body has been blanked.
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