EP 1206329 A1 20020522 - METHOD FOR SHAPING AN INITIAL PROFILE OR A SIMILAR WORKPIECE USING AN INTERNAL HIGH PRESSURE
Title (en)
METHOD FOR SHAPING AN INITIAL PROFILE OR A SIMILAR WORKPIECE USING AN INTERNAL HIGH PRESSURE
Title (de)
VERFAHREN ZUM UMFORMEN EINES AUSGANGSPROFILS OD.DGL. WERKSTÜCKES MITTELS EINES INNENHOCHDRUCKES
Title (fr)
PROCEDE POUR FORMER UN PROFIL DE DEPART OU UNE PIECE SIMILAIRE AU MOYEN D'UNE HAUTE PRESSION INTERNE
Publication
Application
Priority
- CH 0000401 W 20000721
- DE 19936501 A 19990805
- DE 19946011 A 19990925
Abstract (en)
[origin: WO0110580A1] The invention relates to a method for shaping an initial profile (16a) or a similar workpiece, which comprises a profile space, into a final profile by using an internal high pressure that is generated in the sealed profile space by a flowable active medium. In order to shape the initial profile (16n) comprising at least one corner area (28n), preferably at least two corner areas (28n), wall sections (34) which connect in the corner area (28n) are preshaped such that their cross-sections are curved counter to the direction of pressure, and are subsequently straightened by the internal high pressure of the flowable active medium while displacing the corner area (28n) in a direction of pressure. To this end, a profile comprising a profile space that is delimited by profile walls (22n) is used in which two profile walls (22n) define a corner area (28n) of the profile cross-section, whereby at least one of the profile walls (22n) connecting in the corner area (28n) is provided with an area (32) having a curved cross-section. A polygonal cross-section whose profile walls (22n) between the corner areas (28n) each comprise the inwardly curved area (32) or with which selected profile walls (22n) which connect two corner areas (28n) preferably offer a curved area (32).
IPC 1-7
IPC 8 full level
B21D 26/033 (2011.01)
CPC (source: EP)
B21D 26/033 (2013.01)
Citation (search report)
See references of WO 0110580A1
Designated contracting state (EPC)
DE
DOCDB simple family (publication)
WO 0110580 A1 20010215; DE 50012231 D1 20060420; EP 1206329 A1 20020522; EP 1206329 B1 20060215
DOCDB simple family (application)
CH 0000401 W 20000721; DE 50012231 T 20000721; EP 00943513 A 20000721