EP 0484789 B1 19950412 - Method and device for producing holes in the wall of a hollow bodied workpiece.
Title (en)
Method and device for producing holes in the wall of a hollow bodied workpiece.
Title (de)
Verfahren zum Herstellen eines Durchbruches in der Wandung eines als Hohlkörper ausgebildeten Werkstückes und Werkzeug zur Durchführung des Verfahrens.
Title (fr)
Procédé et outil pour la production des trous dans la paroi d'un corps creux.
Publication
Application
Priority
DE 4035625 A 19901109
Abstract (en)
[origin: EP0484789A1] The invention proposes a method for producing a hole in the wall of a work piece (1) designed as a hollow body, in which the work piece (1) is inserted into a form tool (2) which limits its radial expansion and is provided in the region of the envisaged hole with a recess (6) having an edge contour corresponding to the hole. The cavity (3) of the work piece (1) is then pressurised with a working medium up to an internal pressure pi which causes the edge (10) of the recess (6) to cut into the wall of the work piece. This advantageously takes place during another forming operation performed on the work piece (1) using the internal high-pressure forming method. <IMAGE>
IPC 1-7
IPC 8 full level
B21D 22/10 (2006.01); B21D 28/00 (2006.01)
CPC (source: EP)
B21D 22/105 (2013.01); B21D 26/023 (2013.01); B21D 28/007 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0484789 A1 19920513; EP 0484789 B1 19950412; DE 4035625 A1 19920514; DE 59105166 D1 19950518; ES 2071886 T3 19950701
DOCDB simple family (application)
EP 91118373 A 19911029; DE 4035625 A 19901109; DE 59105166 T 19911029; ES 91118373 T 19911029