EP 3586989 A4 20200422 - STRETCH FORMING DEVICE AND STRETCH FORMING METHOD
Title (en)
STRETCH FORMING DEVICE AND STRETCH FORMING METHOD
Title (de)
DEHNFORMUNGSVORRICHTUNG UND DEHNFORMUNGSVERFAHREN
Title (fr)
DISPOSITIF DE FORMAGE D'ÉTIREMENT ET PROCÉDÉ DE FORMAGE D'ÉTIREMENT
Publication
Application
Priority
JP 2017035357 W 20170928
Abstract (en)
[origin: EP3586989A1] 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).
IPC 8 full level
B21D 25/02 (2006.01); B21D 31/00 (2006.01); B21D 37/02 (2006.01); B21D 37/08 (2006.01); B21D 53/92 (2006.01); B21D 11/02 (2006.01)
CPC (source: EP US)
B21D 11/02 (2013.01 - US); B21D 25/02 (2013.01 - EP US); B21D 31/005 (2013.01 - EP); B21D 37/02 (2013.01 - EP); B21D 37/08 (2013.01 - EP); B21D 53/92 (2013.01 - EP); B21D 11/02 (2013.01 - EP)
Citation (search report)
- [X] WO 2009145538 A2 20091203 - PUSAN NAT UNIV IND COOP FOUND [KR], et al
- [X] US 6272897 B1 20010814 - CIRANNA ANTHONY D [US]
- [X] WO 2014061530 A1 20140424 - KAWASAKI HEAVY IND LTD [JP]
- [A] US 5860314 A 19990119 - POWERS III JOHN [US]
- See references of WO 2019064462A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3586989 A1 20200101; EP 3586989 A4 20200422; JP 6834014 B2 20210224; JP WO2019064462 A1 20191219; US 2020108431 A1 20200409; WO 2019064462 A1 20190404
DOCDB simple family (application)
EP 17927131 A 20170928; JP 2017035357 W 20170928; JP 2019545517 A 20170928; US 201716496774 A 20170928