EP 0894548 A3 20000419 - Method and device for forming bulges on elements
Title (en)
Method and device for forming bulges on elements
Title (de)
Verfahren und Vorrichtung zur Herstellung von Nebenformelementen
Title (fr)
Méthode et dispositif de formage de bosselages sur des éléments
Publication
Application
Priority
DE 19733474 A 19970802
Abstract (en)
[origin: EP0894548A2] The method concerns production of lateral form elements (bulges, shoulders, elongate flats etc.) on an elongate, circumferentially closed hollow article (1). The elements are produced by internal high pressure forming in a tool which has top and bottom halves. The article is dented in the region of the proposed lateral form element using a punch (13). Subsequently during the forming process, while the punch is being retracted, the material of article is pressed against the punch face and side surfaces by high internal fluid pressure. There is a fixed element which has a stop surface and an opening for passage and guidance of the punch (13).
IPC 1-7
IPC 8 full level
B21C 37/29 (2006.01); B21D 26/02 (2006.01); B21D 26/037 (2011.01)
CPC (source: EP US)
B21C 37/294 (2013.01 - EP US); B21D 26/037 (2013.01 - EP US)
Citation (search report)
- [AD] DE 9407812 U1 19940721 - ZEUNA STAERKER KG [DE]
- [A] US 4928509 A 19900529 - NAKAMURA MASANOBU [JP]
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 0894548 A2 19990203; EP 0894548 A3 20000419; EP 0894548 B1 20010829; DE 19733474 A1 19990218; DE 19733474 C2 19991209; DE 59801292 D1 20011004; ES 2162376 T3 20011216; US 6143235 A 20001107
DOCDB simple family (application)
EP 98113616 A 19980722; DE 19733474 A 19970802; DE 59801292 T 19980722; ES 98113616 T 19980722; US 12783098 A 19980803