Patent ID: 11925968
Assignee: NIPPON STEEL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 12:
13. The press-forming apparatus according to claim 12, further comprising:
a third lower die including a third bottom surface, a third wall surface rising from the third bottom surface, and a third flange surface extending from an upper edge of the third wall surface toward a side opposite to the third bottom surface;
a third upper die formed in a shape corresponding to the third lower die and having a workpiece between the third upper die and the third lower die;
a fourth lower die including a fourth bottom surface, a fourth wall surface rising from the fourth bottom surface, and a fourth flange surface extending from an upper edge of the fourth wall surface toward a side opposite to the fourth bottom surface and disposed adjacent to the third lower die; and
a fourth upper die formed in a shape corresponding to the fourth lower die and having a workpiece between the fourth upper die and the fourth lower die,
wherein a set of the first lower die, the first upper die, the second lower die, and the second upper die is capable of being replaced with a set of the third lower die, the third upper die, the fourth lower die, and the fourth upper die, and
the drive portion moves the fourth upper die and the fourth lower die relative to the third upper die and the third lower die.