EP 0029380 B1 19860129 - METHOD OF FORMING A BEAD IN THE WALL OF A METALLIC TUBE
Title (en)
METHOD OF FORMING A BEAD IN THE WALL OF A METALLIC TUBE
Publication
Application
Priority
FR 7928184 A 19791115
Abstract (en)
[origin: EP0029380A1] 1. A process for forming a collar (11, 11') on the wal of a metal tube (1, 1'), preferably of small thickness, said process being characterized in that the tube (1, 1') being empty of any filling a circular groove (6, 6', 17) delimited by two adjacent sides (7, 8) is formed in per se known manner at the periphery of the tube (1, 1') and on the face opposite to that where the collar is to be produced, by an operation of displacing the metal such as knurling, and that a an axial compression is then applied to the ends of the tube (1, 1') until the two adjacent sides (7, 8) formed in the course of the first phase are brought into contact.
IPC 1-7
IPC 8 full level
B21D 17/00 (2006.01); B21D 17/04 (2006.01); B21C 37/20 (2006.01); B21D 19/00 (2006.01)
CPC (source: EP)
B21D 17/00 (2013.01); B21D 17/04 (2013.01)
Designated contracting state (EPC)
AT CH DE GB LI NL
DOCDB simple family (publication)
EP 0029380 A1 19810527; EP 0029380 B1 19860129; AT E17665 T1 19860215; BE 886187 A 19810514; DE 3071398 D1 19860313; ES 496813 A0 19820501; ES 8204318 A1 19820501; FR 2469226 A1 19810522; FR 2469226 B1 19830923; IT 1147785 B 19861126; IT 8068695 A0 19801106; JP S56128619 A 19811008; JP S6240093 B2 19870826
DOCDB simple family (application)
EP 80401568 A 19801103; AT 80401568 T 19801103; BE 202816 A 19801114; DE 3071398 T 19801103; ES 496813 A 19801113; FR 7928184 A 19791115; IT 6869580 A 19801106; JP 15574980 A 19801104