Title:
PROGRESSIVE DIE AND MACHINING METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2023/199503
Kind Code:
A1
Abstract:
[Problem] To control or adjust the displacement of a thin strip steel sheet due to the weight thereof in a progressive die, regardless of the magnitude of the width of the thin strip steel sheet. [Solution] A progressive die 1 comprises an upper die 3 and a lower die 4. One stage for machining a thin strip steel sheet F includes: side guides 61A, 61B for guiding one lateral portion of the thin strip steel sheet F in the conveyance direction; and lifters 63A, 63B which are respectively disposed so as to correspond to the side guides 61A, 61B and lift the thin strip steel sheet F. The lifters 63A, 63B respectively have pressing parts 79A, 79B for pressing the lower surface of the thin strip steel sheet F. The side guides 61A, 61B respectively have abutting parts 70A, 70B that abut the upper surface of the thin strip steel sheet F. The abutting parts 70A, 70B are disposed so as to sandwich the pressing parts 79A, 79B in the conveyance direction and are positioned below the advancing positions of the corresponding pressing parts 79A, 79B.
Inventors:
FU TAO (JP)
YOSHIDA TATSUHIRO (JP)
ICHIKAWA TAKASHI (JP)
YOSHIDA TATSUHIRO (JP)
ICHIKAWA TAKASHI (JP)
Application Number:
PCT/JP2022/017896
Publication Date:
October 19, 2023
Filing Date:
April 15, 2022
Export Citation:
Assignee:
KURODA PRECISION IND LTD (JP)
International Classes:
B21D28/02; B21D43/00
Foreign References:
| JP2021093908A | 2021-06-17 | |||
| JP2016120511A | 2016-07-07 | |||
| JPH10263719A | 1998-10-06 | |||
| JP2012143793A | 2012-08-02 | |||
| JP2013107116A | 2013-06-06 | |||
| JPS6149635A | 1986-03-11 |
Attorney, Agent or Firm:
OSHIMA & PARTNERS (JP)
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