Title:
METHOD AND DEVICE FOR MANUFACTURING PRESSED COMPONENT
Document Type and Number:
WIPO Patent Application WO/2018/003755
Kind Code:
A1
Abstract:
An L-form pressed component is manufactured without wrinkling or breakage by a first step for holding, between a blank holder 73 and a die 71, a portion molded on the outside of a curved part of a blank 8 having a tensile strength of 1180 MPa or greater and holding, between a pad 74 and a punch 72, a portion of the blank 8 molded by a top plate 11, a second step for bending an inside vertical wall 14, a concave edge 17, and a flange 15 of a curved part 1a through use of a bending mold 75, and thereby forming one or more material inflow promoting parts for increasing the inflow rate of the blank 8 toward a portion molded in the flange 15 on the inside of the curved part 1a of the pressed component 1 in the vicinity of the portion of the blank 8 molded by the flange 15 on the inside of the curved part 1a, and a third step for moving the die 71 in the direction in which the blank holder 73 is disposed and drawing the vertical wall 12, the concave edge 16, and the flange 13 on the outside of the curved part 1a.
Inventors:
TANAKA YASUHARU (JP)
ASO TOSHIMITSU (JP)
MIYAGI TAKASHI (JP)
OGAWA MISAO (JP)
YAMAMOTO SHINOBU (JP)
IKEGAMI KEITA (JP)
ASO TOSHIMITSU (JP)
MIYAGI TAKASHI (JP)
OGAWA MISAO (JP)
YAMAMOTO SHINOBU (JP)
IKEGAMI KEITA (JP)
Application Number:
PCT/JP2017/023450
Publication Date:
January 04, 2018
Filing Date:
June 26, 2017
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21D22/26; B21D22/20; B21D24/04; B21D24/12
Domestic Patent References:
| WO2014106932A1 | 2014-07-10 | |||
| WO2014185428A1 | 2014-11-20 |
Foreign References:
| JP2013035068A | 2013-02-21 | |||
| JPS6466024A | 1989-03-13 |
Other References:
See also references of EP 3476500A4
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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