Title:
METAL FORMED PRODUCT INCLUDING TUBULAR PART HAVING SLIT AND MANUFACTURING METHOD THEREFOR, AND MANUFACTURING DEVICE AND DIE USED FOR SAME
Document Type and Number:
WIPO Patent Application WO/2016/136259
Kind Code:
A1
Abstract:
This disclosed manufacturing method is a manufacturing method for manufacturing a metal formed product including a tubular part (1e) having a slit (3). This manufacturing method includes: a step (i) for forming a U-shaped part that has a U-shaped cross section, by deforming a sheet metal; and a step (ii) for forming the tubular part (1e) having the slit, by deforming the U-shaped part using a die (20) having a protrusion (23), in such a way that the protrusion is held between the two ends of the U-shaped part. In the step (ii), a cross-sectional circumferential length LH of the tubular part (1e) is made shorter than a cross-sectional length LU of the U-shaped part.
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Inventors:
SATO MASAHIKO (JP)
YOSHIDA TOHRU (JP)
YOSHIDA TOHRU (JP)
Application Number:
PCT/JP2016/001012
Publication Date:
September 01, 2016
Filing Date:
February 25, 2016
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21D5/01
Domestic Patent References:
| WO2005002753A1 | 2005-01-13 |
Foreign References:
| DE102009017571A1 | 2010-11-11 | |||
| JP2014004626A | 2014-01-16 | |||
| JP2009119466A | 2009-06-04 | |||
| JP2004298907A | 2004-10-28 | |||
| US1872276A | 1932-08-16 | |||
| JP2009517222A | 2009-04-30 | |||
| JP2001191112A | 2001-07-17 | |||
| JP2014516801A | 2014-07-17 |
Other References:
See also references of EP 3263240A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
アセンド patent business corporation (JP)
アセンド patent business corporation (JP)
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