公开(公告)号：US11819900B2

公开(公告)日：2023-11-21

申请号：US17924773

申请日：2020-05-14

申请人： NISSAN MOTOR CO., LTD.

发明人： Noriko Uchiyama ,  Hirotaka Miwa ,  Hidenori Watanabe ,  Toshikazu Nanbu

IPC分类号： B21D31/00 ,  B21D37/01 ,  C23C16/00 ,  C23C16/27

CPC分类号： B21D31/005

摘要： An incremental forming tool of the present invention includes a holding portion attached to an incremental forming apparatus and a free curved surface part for pressing a metal plate.
The free curved surface part is made of at least a hard metal base material and a surface of the free curved surface part is covered with a hard film.
The surface of the hard film has an Rpk of 0.15 μm or less, the Rpk is defined by JIS B 0671 and is calculated from a material ratio curve of a roughness curve, and has an Ra of 0.2 μm or less, the Ra is defined by JIS B 0601 and is calculated from a roughness curve. Therefore, a molded product having a smooth worked surface with no roughness can be produced without adding any extra equipment for preventing adhesion.