公开(公告)号：US09718499B2

公开(公告)日：2017-08-01

申请号：US14758671

申请日：2013-12-20

申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION

发明人： Yasuharu Tanaka ,  Toshimitsu Aso ,  Takashi Miyagi ,  Misao Ogawa ,  Kazuyuki Kawano ,  Kazunori Oooka ,  Shinobu Yamamoto

IPC分类号： B62D25/04 ,  B62D65/00 ,  B21J5/02 ,  B21K7/12 ,  B21D22/20 ,  B21D22/22 ,  B21D22/26 ,  B21D53/88 ,  B21D24/04 ,  B21D5/04

CPC分类号： B62D25/04 ,  B21D5/045 ,  B21D22/20 ,  B21D22/22 ,  B21D22/26 ,  B21D24/04 ,  B21D53/88 ,  B21J5/02 ,  B21K7/12 ,  B62D65/00 ,  Y10T29/49623 ,  Y10T428/1241

摘要： The top plate section of the metal stock is pressed and clamped against a punch by a pad, a portion that will be at the outside of the L shaped curve is pressed and camped against a die by a blank holder, a bender is moved, and a vertical wall portion at the inside of the L shaped curved of the metal stock sheet and the flange portion joined to the vertical wall at the inside of the L shaped curve are molded. The metal stock sheet is moved in the direction toward the blank holder while the metal stock sheet being pressed and clamped, and a vertical wall portion at the outside of the L shaped curve of the L shaped hat shaped cross-section and the flange portion joined to the vertical wall at the outside of the L shaped curve are molded.