Title:
METHOD FOR MANUFACTURING BLANK, BLANK, METHOD FOR MANUFACTURING PRESS-MOLDED ARTICLE, AND PRESS-MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2018/034120
Kind Code:
A1
Abstract:
Through the present invention, a differential-thickness blank as an integrated object having a plate thickness distribution is provided by a simple method. A first blank (2) as a blank having larger dimensions than the dimensions of a desired blank (1) for use in press molding is drawn using a punch (3) and a die, and the drawn first blank (2) is trimmed to the necessary dimensions and used as the abovementioned desired blank (1) for use in press molding. During drawing, the punch (3) has a punch bottom having larger dimensions than the dimensions of the desired blank (1), and restriction of a portion of positions on the external periphery of the first blank (2) during drawing is made relatively stronger, whereby a portion of the plate thickness in the desired blank (1) after drawing is relatively reduced to obtain a blank having a plate thickness distribution.
More Like This:
| JPS58107223 | 【考案の名称】プレス成形装置 |
| JPS59159228 | PRESS FORMING DEVICE |
Inventors:
NAKAGAWA KINYA (JP)
YAMASAKI YUJI (JP)
YAMASAKI YUJI (JP)
Application Number:
PCT/JP2017/027017
Publication Date:
February 22, 2018
Filing Date:
July 26, 2017
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/22; B21D22/20; B21D24/00; B21D24/04; B21D24/16
Domestic Patent References:
| WO2016039102A1 | 2016-03-17 |
Foreign References:
| JPH0760372A | 1995-03-07 |
Attorney, Agent or Firm:
MORI Tetsuya et al. (JP)
Download PDF: