Title:
METHOD FOR MANUFACTURING PRESSED COMPONENT, AND METHOD FOR MANUFACTURING BLANK MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/158478
Kind Code:
A1
Abstract:
Provided is a technique with which it is possible to suppress end cracking due to stretch flange deformation, without being restricted by the shape of the target pressed component. The method includes a double cutting process in which, if it is estimated that end cracking due to stretch flange deformation of an end portion of a material (1) to be pressed will be a concern during press molding, the end portion including at least the location in which end cracking is a concern is twice subjected to a cutting process, as pre-processing for the press molding in which the end cracking is a concern. In the double cutting process, cutting is performed during the first cutting to form a partial beam-shaped overhanging portion at a position including the location in which end cracking is a concern, and the overhanging portion is cut off during the second cutting.
Inventors:
OGAWA TAKESHI (JP)
IIZUKA EIJI (JP)
IIZUKA EIJI (JP)
Application Number:
PCT/JP2020/001724
Publication Date:
August 06, 2020
Filing Date:
January 20, 2020
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/26; B21D28/00; B21D22/20
Domestic Patent References:
| WO2014185428A1 | 2014-11-20 |
Foreign References:
| JPH0947826A | 1997-02-18 | |||
| CN207103550U | 2018-03-16 | |||
| JP2008119736A | 2008-05-29 | |||
| JP4959605B2 | 2012-06-27 | |||
| JP5387022B2 | 2014-01-15 | |||
| JP2008119736A | 2008-05-29 | |||
| JP4959605B2 | 2012-06-27 | |||
| JP5387022B2 | 2014-01-15 | |||
| JP2019015238A | 2019-01-31 |
Other References:
JOURNAL OF THE JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY, vol. 10, no. 104, September 1969 (1969-09-01)
See also references of EP 3919198A4
See also references of EP 3919198A4
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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