EP 2823905 A4 20150701 - WARM PRESS FORMING METHOD AND AUTOMOBILE FRAME COMPONENT
Title (en)
WARM PRESS FORMING METHOD AND AUTOMOBILE FRAME COMPONENT
Title (de)
HEISSPRESSFORMVERFAHREN UND KAROSSERIEKOMPONENTEN EINES KRAFTFAHRZEUGS
Title (fr)
PROCÉDÉ DE FORMAGE SOUS PRESSION À CHAUD ET COMPOSANT DE CHÂSSIS D'AUTOMOBILE
Publication
Application
Priority
- JP 2012048725 A 20120306
- JP 2013001316 W 20130304
Abstract (en)
[origin: EP2823905A1] Disclosed is a method for forming a steel sheet having a tensile strength of 440 MPa or more into a press-formed part including a flange portion and other portions by press forming, the method includes: heating the steel sheet to a temperature range of 400 °C to 700 °C; and then press-forming the heated steel sheet using draw forming to obtain a press-formed part, with the steel sheet being held at a press bottom dead point in the die for one second to five seconds. In this way, geometric changes such as springback that occur in a panel can be suppressed, the dimensional accuracy of the panel can be enhanced accordingly, and the desired mechanical properties can easily be obtained in the press-formed part.
IPC 8 full level
B21D 22/20 (2006.01); B21D 53/88 (2006.01); C21D 9/00 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/14 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP US)
B21D 22/02 (2013.01 - EP); B21D 22/208 (2013.01 - EP US); B21J 1/06 (2013.01 - US); B21K 7/12 (2013.01 - US); C21D 1/673 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/007 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/08 (2013.01 - EP US); C22C 38/105 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/20 (2013.01 - EP US); C22C 38/24 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/60 (2013.01 - EP US); C23C 2/06 (2013.01 - EP US); C23C 2/28 (2013.01 - EP US); C23C 2/29 (2022.08 - EP US); B21D 53/88 (2013.01 - EP US); C21D 2211/004 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US)
Citation (search report)
- [X] JP 2006212663 A 20060817 - NIPPON STEEL CORP
- [XI] US 2005257862 A1 20051124 - ASAI TATSUYA [JP], et al
- [Y] JP 2010188393 A 20100902 - SUMITOMO METAL IND
- [Y] JP 2003113442 A 20030418 - SUMITOMO METAL IND
- [X] JP 2010065293 A 20100325 - JFE STEEL CORP
- [A] JP 2005262235 A 20050929 - NIPPON STEEL CORP
- See references of WO 2013132821A1
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
DOCDB simple family (publication)
EP 2823905 A1 20150114; EP 2823905 A4 20150701; EP 2823905 B1 20170111; EP 2823905 B2 20200325; CN 104159681 A 20141119; CN 104159681 B 20160224; JP WO2013132821 A1 20150730; KR 101630557 B1 20160614; KR 20140122266 A 20141017; US 2015064052 A1 20150305; WO 2013132821 A1 20130912
DOCDB simple family (application)
EP 13757922 A 20130304; CN 201380012479 A 20130304; JP 2013001316 W 20130304; JP 2014503474 A 20130304; KR 20147024612 A 20130304; US 201314382995 A 20130304