EP 2720813 B2 20180627 - METHOD FOR PRODUCING SLIT HOLLOW PROFILES
Title (en)
METHOD FOR PRODUCING SLIT HOLLOW PROFILES
Title (de)
VERFAHREN ZUR HERSTELLUNG GESCHLITZTER HOHLPROFILE
Title (fr)
PROCÉDÉ DE FABRICATION DE PROFILÉS CREUX FENDUS
Publication
Application
Priority
- DE 102011051160 A 20110617
- EP 2012061002 W 20120611
Abstract (en)
[origin: WO2012171875A1] The invention relates to a method for producing slit hollow profiles from a precut blank, wherein the hollow profile is produced from the substantially flat blank using the roll forming technique or using a U-0 forming procedure so that, in the axial direction, the hollow profile comprises a slit along the butting edges of the shaped blank. The aim of the invention is to provide a method for producing closed hollow profiles, which allows, in a simple manner, the production of large volume, slit hollow profiles, which can easily be joined to closed hollow profiles. Said aim is achieved in that in the locally provided cross sectional areas, the precut blank has a circumferential length that is larger than the necessary forming length provided so that when the precut blank is reshaped to form a closed hollow profile, the opposite edges of the reshaped precut blank butt against each other. During shaping into the final form, the surfaces of the hollow profile abutting the edge joint in a circumferential direction are deformed, at least in part.
IPC 8 full level
B21D 5/01 (2006.01); B21C 37/06 (2006.01); B21C 37/08 (2006.01)
CPC (source: EP US)
B21C 37/065 (2013.01 - US); B21C 37/0815 (2013.01 - EP US); B21D 5/015 (2013.01 - EP US)
Citation (opposition)
Opponent :
- US 6266858 B1 20010731 - MASHIKO SEIJI [JP], et al
- DE 10062836 A1 20020627 - HUBERT SCHLIEKMANN GMBH [DE]
- DE 102009003668 A1 20100930 - THYSSENKRUPP STEEL EUROPE AG [DE]
- DE 2657269 A1 19770707 - GROTNES MACHINE WORKS INC
- DE 102006025522 A1 20071213 - THYSSENKRUPP STEEL AG [DE]
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)
DE 102011051160 A1 20121220; CN 103608132 A 20140226; CN 103608132 B 20160525; EP 2720813 A1 20140423; EP 2720813 B1 20141001; EP 2720813 B2 20180627; ES 2526888 T3 20150116; ES 2526888 T5 20181022; JP 2014516801 A 20140717; JP 5706042 B2 20150422; KR 101974963 B1 20190503; KR 20140034913 A 20140320; US 2014096579 A1 20140410; US 8833128 B2 20140916; WO 2012171875 A1 20121220
DOCDB simple family (application)
DE 102011051160 A 20110617; CN 201280029779 A 20120611; EP 12726804 A 20120611; EP 2012061002 W 20120611; ES 12726804 T 20120611; JP 2014515148 A 20120611; KR 20147001251 A 20120611; US 201314104735 A 20131212