Title:
HOLLOW MEMBER MANUFACTURING METHOD AND MANUFACTURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/077742
Kind Code:
A1
Abstract:
[Problem] To provide a hollow member manufacturing method and manufacturing device with which it is possible to process, in a progressive press-processing system, an end surface of a hollow member without trimming.
[Solution] According to the present invention, during progressive press-processing, in a state in which a plurality of products in progress are formed on a sheet material M, at least one of the plurality of products in progress is subjected to bending processing to form a hollow product W4 in progress, one product in progress formed into a columnar body is separated from the sheet material, and, using a pair of molding dies 244, 255 which are brought closer to or are spaced apart from each other, an end surface in an axial direction of the columnar body is subjected to press processing to make the end surface flatter than before the press processing.
Inventors:
SUENAGA YUJI (JP)
UENO MASAKI (JP)
KIMURA HIROSHI (JP)
UENO MASAKI (JP)
KIMURA HIROSHI (JP)
Application Number:
PCT/JP2017/038019
Publication Date:
April 25, 2019
Filing Date:
October 20, 2017
Export Citation:
Assignee:
YOROZU JIDOSHA KOGYO KK (JP)
International Classes:
B21D51/10; B21D5/01; B21D5/12; B21D19/00; B21D53/16; B30B13/00
Foreign References:
| JP2004255385A | 2004-09-16 | |||
| JP2005187872A | 2005-07-14 | |||
| JP2011189357A | 2011-09-29 | |||
| JPH09253751A | 1997-09-30 |
Attorney, Agent or Firm:
HATTA & ASSOCIATES (JP)
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