Title:
板状部品の製造方法
Document Type and Number:
Japanese Patent JP7384728
Kind Code:
B2
Abstract:
A manufacturing method of a plate member, in which a strip material can be positioned with respect to a die all through stamping operations using a pilot hole formed in an initial phase of the stamping operations. The plate member is manufactured by a press machine in which a progressive stamping die having a plurality of stations is placed. The manufacturing method comprises: forming an oval pilot hole 14 in an uncoiled strip 13; and stamping the uncoiled strip 13 by a plurality of operations while bringing a pilot pin 17 into contact with an inner edge of the pilot hole 14 at the operation before the pilot hole 14 is displaced, and at the operation after the pilot hole 14 is displaced.
Inventors:
Masahiro Shiotani
Application Number:
JP2020058741A
Publication Date:
November 21, 2023
Filing Date:
March 27, 2020
Export Citation:
Assignee:
Daiwa Seikan Co., Ltd.
International Classes:
B21D43/04; B21D22/02; B21D24/02; B21D28/24; B21D43/05
Domestic Patent References:
| JP2000140953A | ||||
| JP3086333A | ||||
| JP3230824A | ||||
| JP2019047689A | ||||
| JP2008221284A |
Attorney, Agent or Firm:
Takeo Watanabe
Kikuhiko Nakamoto
Kikuhiko Nakamoto
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