Title:
パネル状成形品の製造方法
Document Type and Number:
Japanese Patent JP6638806
Kind Code:
B2
Abstract:
This method for manufacturing a panel-like formed article has preparing a blank material made of a metal sheet having a tensile strength of 390 MPa or more and 980 MPa or less; and press-forming the blank material in a cold manner using a pressing apparatus to form the blank material into the panel-like formed article, in the press-forming, a blank holder, a first punch, and a second punch are relatively moved with respect to a die, thereby pressing the first punch and the second punch to the blank material, and pressing of the second punch to the blank material is completed before pressing of the first punch to the blank material.
Inventors:
Kenichiro Otsuka
Hama Koichi Ta
Yoshiaki Nakazawa
Hama Koichi Ta
Yoshiaki Nakazawa
Application Number:
JP2018506000A
Publication Date:
January 29, 2020
Filing Date:
March 16, 2017
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B21D22/26; B21D22/20; B21D24/00; B21D24/04; B21D53/88
Domestic Patent References:
| JP2013000780A | ||||
| JP4162922A | ||||
| JP8010861A | ||||
| JP59062819U |
Foreign References:
| WO2012147963A1 |
Attorney, Agent or Firm:
Sumio Tanai
Mitsuo Teramoto
Tomoo Katsumata
Hiroshi Yamaguchi
Mitsuo Teramoto
Tomoo Katsumata
Hiroshi Yamaguchi