EP 1197274 B1 20041229 - High pressure hydroforming press
Title (en)
High pressure hydroforming press
Title (de)
Innenhochdruckumformungspresse
Title (fr)
Presse de formage hydraulique sous pression élevée
Publication
Application
Priority
- EP 98914753 A 19980416
- US 4395097 P 19970416
Abstract (en)
[origin: EP1197274A1] An apparatus for hydroforming a tubular metal blank has a die structure (12) having an internal die surface defining a die cavity, said die cavity being constructed and arranged to receive the tubular metal blank; a hydroforming fluid source disposed higher than said die cavity, a hydraulically driven tube-end engaging structure being movable to longitudinally compress the tubular metal blank, said tube-end engaging structure constructed and arranged to receive hydroforming fluid; and a hydraulically driven pressure intensifying structure movable in response to hydraulic fluid pressure to pressurize said hydroforming fluid provided to the interior of the tubular metal blank and thereby expand a diameter of the blank, said hydraulically driven tube-end engaging structure being movable in response to hydraulic fluid pressure to enable said tube-end engaging structure to longitudinally compress the tubular metal blank and cause metal material of the diametrically expanded tubular blank to flow longitudinally inwardly in order to replenish a wall thickness of the diametrically expanded tubular metal blank and maintain the wall thickness thereof within a predetermined range. <IMAGE>
IPC 1-7
IPC 8 full level
B21D 26/02 (2006.01); B21D 26/041 (2011.01)
CPC (source: EP)
B21D 26/041 (2013.01)
Designated contracting state (EPC)
AT DE ES FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 01127374 A 19980416