Global Patent Index - EP 1197274 B1

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

EP 1197274 B1 20041229 (EN)

Application

EP 01127374 A 19980416

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

B21D 26/02

IPC 8 full level

B21D 26/02 (2011.01); 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)

EP 1197274 A1 20020417; EP 1197274 B1 20041229

DOCDB simple family (application)

EP 01127374 A 19980416