EP 0036365 B1 19840912 - PROCESS FOR MANUFACTURING WORKPIECES BY HYDRAULIC-PRESSURE SHAPING, AND APPARATUS FOR CARRYING OUT THIS PROCESS
Title (en)
PROCESS FOR MANUFACTURING WORKPIECES BY HYDRAULIC-PRESSURE SHAPING, AND APPARATUS FOR CARRYING OUT THIS PROCESS
Publication
Application
Priority
FR 8005656 A 19800313
Abstract (en)
[origin: EP0036365A1] 1. A method for obtaining by the hydraulic bending process, pieces of such shapes as T, or bulb sections from blanks having the shape of a tubular cross section or a similar shape, wherein one applies mechanical compression in the longitudinal direction of the blank and then hydraulic pressure within the latter so as to obtain a deformation of the blank in the transverse direction, the method being characterized in that it comprises at least one stage consisting in measuring, when the longitudinal compression attains a predetermined value, the corresponding value, the corresponding value of the internal pressure and/or of the transverse deformation of the blank, and in determining, depending on the said corresponding value, the subsequent relationship between the internal pressure and the longitudinal compression.
IPC 1-7
IPC 8 full level
B21C 37/29 (2006.01); B21D 26/02 (2011.01); B21D 26/041 (2011.01)
CPC (source: EP)
B21C 37/294 (2013.01); B21D 26/041 (2013.01)
Citation (examination)
- FR 1048482 A 19531222 - ICI LTD
- FR 2073790 A5 19711001 - TNO, et al
Designated contracting state (EPC)
AT BE CH DE GB IT LI NL SE
DOCDB simple family (publication)
EP 0036365 A1 19810923; EP 0036365 B1 19840912; AT E9283 T1 19840915; DE 3165914 D1 19841018; FR 2477918 A1 19810918; FR 2477918 B1 19840302
DOCDB simple family (application)
EP 81400387 A 19810313; AT 81400387 T 19810313; DE 3165914 T 19810313; FR 8005656 A 19800313