EP 1635983 A2 20060322 - PROCESS FOR PRESS FORMING METAL TUBES
Title (en)
PROCESS FOR PRESS FORMING METAL TUBES
Title (de)
VERFAHREN ZUM PRESSFORMEN VON METALLROHREN
Title (fr)
PROCEDE POUR LA FORMATION SOUS PRESSION DE TUBES METALLIQUES
Publication
Application
Priority
- US 2004014278 W 20040507
- US 46902903 P 20030508
- US 75796704 A 20040114
Abstract (en)
[origin: WO2004101187A2] Sub-blanks having different thicknesses and/or different materials are joined together along a joint line or boundary line. The joint line can have an axial directional component and/or a radial directional component. The blank is formed into a U-shaped structure with two substantially parallel arms and the arms can be overbent toward each other by a distance that varies along the axial length of the U-shaped member. The U-shaped member can be subjected to a press forming operation to form a substantially tubular member. The substantially tubular member can have a non-circular cross-sectional shape. A step can be formed at the joint line as a result of different thickness sub-blanks. The step is placed in a press forming die facing outwardly so that the step is reduced during the press forming operation.
IPC 1-7
IPC 8 full level
B21C 37/08 (2006.01); B21C 37/18 (2006.01); B21D 5/01 (2006.01); B23P 11/00 (2006.01)
IPC 8 main group level
B21C (2006.01)
CPC (source: EP KR)
B21C 37/065 (2013.01 - EP); B21C 37/0803 (2013.01 - EP); B21C 37/0815 (2013.01 - EP); B21C 37/185 (2013.01 - EP); B21D 5/015 (2013.01 - EP); B23P 11/00 (2013.01 - KR); B21D 26/033 (2013.01 - EP)
Citation (search report)
See references of WO 2004101187A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004101187 A2 20041125; WO 2004101187 A3 20050303; AU 2004238826 A1 20041125; CA 2526929 A1 20041125; EP 1635983 A2 20060322; JP 2007501714 A 20070201; KR 20060034639 A 20060424; MX PA05011842 A 20060525
DOCDB simple family (application)
US 2004014278 W 20040507; AU 2004238826 A 20040507; CA 2526929 A 20040507; EP 04760918 A 20040507; JP 2006532852 A 20040507; KR 20057021110 A 20051107; MX PA05011842 A 20040507