Global Patent Index - EP 2823905 B2

EP 2823905 B2 20200325 - 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

EP 2823905 B2 20200325 (EN)

Application

EP 13757922 A 20130304

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); B21J 1/06 (2006.01); B21K 7/12 (2006.01); C21D 1/673 (2006.01); C21D 8/02 (2006.01); C21D 9/00 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/20 (2006.01); C22C 38/24 (2006.01); C22C 38/28 (2006.01); C22C 38/44 (2006.01); C22C 38/50 (2006.01); C22C 38/60 (2006.01); C23C 2/06 (2006.01); C23C 2/28 (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 (opposition)

Opponent :

  • JP 2011230189 A 20111117 - JFE STEEL CORP
  • US 2005257862 A1 20051124 - ASAI TATSUYA [JP], et al
  • JP 2010188393 A 20100902 - SUMITOMO METAL IND
  • DE 102008020757 A1 20081106 - VOLKSWAGEN AG [DE]
  • DE 102007008117 B3 20080821 - VOESTALPINE ANARBEITUNG GMBH [AT]
  • WO 2011162412 A1 20111229 - JFE STEEL CORP [JP], et al
  • EP 1403388 A1 20040331 - THYSSENKRUPP STAHL AG [DE]
  • DE 102008050315 A1 20090520 - DAIMLER AG [DE]
  • SEIJIRO MAKI: "Resistance Heating Characteristics of High-Strength Steel Sheet Blank for Hot Press Forming", KEY ENGINEERING MATERIALS, vol. 340-341, 1 January 2007 (2007-01-01), pages 749 - 754, XP055431089
  • JIS G 3135, 11 July 1986
  • SCHIESSL, G. ET AL: "Manufacturing a roof frame from ultrahigh-strength steel materials by hot stamping", PROCEEDINGS IDDRG INTERNATIONAL DEEP DRAWING RESEARCH GROUP 2004 CONFERENCE, FORMING THE FUTURE, VDEH, pages 158 - 166
  • KOLECK, R. ET AL: "Manufaturing methods for safety and structural body parts for lightweight body design", PROCEEDINGS IDDRG INTERNATIONAL DEEP DRAWING RESEARCH GROUP 2004 CONFERENCE, FORMING THE FUTURE, VDEH, pages 167 - 1173
  • LENZE F-J: "Herstellung von Karosseriebauteilen aus warmumgeformten h¦chfesten Stahlwerkstoffe", EFB TAGUNGSBAND, vol. 25, 2005, pages 53 - 61, XP009098694
  • YANAGIMOTO ET AL: "Springback of High-Strength Steel after Hot and Warm Sheet Formings", CIRP ANNALS, vol. 54, no. 1, 2005, pages 213 - 216, XP022122554
  • MORI ET AL: "Warm and Hot Stamping of Ultra High Tensile Strength Steel Sheets Using Resistance Heating", CIRP ANNALS, vol. 54, no. 1, 2005, pages 209 - 212, XP022122553
  • HELLER ET AL: "The Conference Steels in Cars and Trucks", 2005, VERLAG STAHLEISEN, article "ThyssenKrupp Stahl - Semi-hot forming as an Advantage to Hot forming", pages: 564, XP055431217

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