EP 0876860 A3 20001011 - Method and apparatus for making bulged hollow profiles
Title (en)
Method and apparatus for making bulged hollow profiles
Title (de)
Verfahren und Einrichtung zur Herstellung von ausgebauchten Hohlprofilen
Title (fr)
Procédé et dispositif de fabrication de profilés creux bombés
Publication
Application
Priority
DE 19719628 A 19970509
Abstract (en)
[origin: EP0876860A2] A profile is changed from a long thin linear blank into a shorter end form with a bulge, using an internal high pressure forming process. Before this stage, the profile (1) is flattened in the area of the bulge (8) to be formed. After this, the internal forming of the residual part of the profile is carried out at this spot, while the flat section is retained. The flattened area is formed before the profile is placed in a forming tool. Alternatively, the flat section is formed when a part of the tool surrounding the bulge area is closed.
IPC 1-7
IPC 8 full level
B21D 26/02 (2006.01); B21D 26/033 (2011.01); B21D 53/90 (2006.01)
CPC (source: EP)
B21D 26/033 (2013.01); B21D 53/90 (2013.01)
Citation (search report)
- [Y] US 1501023 A 19240708 - GOODSPEED ELVIN S
- [Y] US 5070717 A 19911210 - BOYD DAVID B [US], et al
- [A] DE 1908729 A1 19690918 - NAKAMURA MASANOBU
- [A] PATENT ABSTRACTS OF JAPAN vol. 005, no. 172 (M - 095) 31 October 1981 (1981-10-31)
- [A] TERUMORI UEDA: "differential gear casings for automobiles by liquid bulge forming processes", SHEET METAL INDUSTRIES, vol. 60, no. 4, April 1983 (1983-04-01), london, pages 220 - 224, XP002145142
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0876860 A2 19981111; EP 0876860 A3 20001011; EP 0876860 B1 20021218; DE 19719628 A1 19981112; DE 19719628 C2 20000706; DE 59806669 D1 20030130; ES 2187853 T3 20030616
DOCDB simple family (application)
EP 98107665 A 19980428; DE 19719628 A 19970509; DE 59806669 T 19980428; ES 98107665 T 19980428