Title:
ストレッチ成形装置及びストレッチ成形方法
Document Type and Number:
Japanese Patent JP6834014
Kind Code:
B2
Abstract:
The objective of the present invention is to reduce unevenness in an amount of deformation of a central portion and an end portion of an elongate material being formed. A stretch forming device (1) is provided with a die (2) and gripping portions (3) which grip both end portions of an elongate material (20), wherein: the cross-sectional shape of the die (2) has a curved shape in which a central side of a forming surface (6) bulges; the length in a longitudinal direction of the elongate material (20) is less than that of the forming surface (6); a second die (7) having a second forming surface (8) along the forming surface (6) is installed removably on a central portion of the forming surface (6); and the stretch forming device (1) has a first mode in which, when the second die (7) has been installed on the forming surface (6), only the second die (7) is pressed against the elongate material (20) while a tensile force is applied to the elongate material (20) by the grip portions (3), and a second mode in which, when the second die (7) has been removed from the forming surface (6), the die (2) is pressed against the elongate material (20) while a tensile force is applied to the elongate material (20) by the gripping portions (3).
More Like This:
Inventors:
Takeshi Yamada
Ryo Kawano
Atsushi Sugai
Yu Matsunaga
Kondo Jie
Satoshi Kamata
Ryo Kawano
Atsushi Sugai
Yu Matsunaga
Kondo Jie
Satoshi Kamata
Application Number:
JP2019545517A
Publication Date:
February 24, 2021
Filing Date:
September 28, 2017
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
B21D11/02; B21D37/02
Domestic Patent References:
| JP2006231380A | ||||
| JP1154821A | ||||
| JP2001137972A | ||||
| JP2002316216A |
Foreign References:
| US20100043511 | ||||
| US6053026 | ||||
| US4548065 |
Attorney, Agent or Firm:
Noriharu Fujita
Miori Takao
Kawakami Miki
Daisuke Nagata
Miori Takao
Kawakami Miki
Daisuke Nagata