EP 0318905 B1 19940615 - Method and apparatus for making downpipes.
Title (en)
Method and apparatus for making downpipes.
Title (de)
Verfahren und Vorrichtung zur Herstellung von Regenfallrohren.
Title (fr)
Procédé et appareil pour la fabrication de tuyaux de descente.
Publication
Application
Priority
DE 3740750 A 19871202
Abstract (en)
[origin: EP0318905A2] In a method for making lock-seamed push-in downpipes, the longitudinal edges of pipe profiles prerounded by forming sheet-metal strip blanks of a certain width and length under bending conditions are set on edge, then brought together to form a seamed connection, whereupon the latter is bent over flat onto the outer circumference of the pipe profile. In order to achieve high surface quality of the downpipes, the seamed connection is formed by forming the longitudinal edges of the pipe profile in several sections under bending conditions, using a rotary tool motion, the pipe profile is transported in the delivery direction by the length of the respectively formed section of the seamed connection and, in the production of the last section of the seamed connection, the pipe profile is widened in this section.
IPC 1-7
IPC 8 full level
B21C 37/10 (2006.01)
CPC (source: EP)
B21C 37/10 (2013.01); B21C 37/101 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL
DOCDB simple family (publication)
EP 0318905 A2 19890607; EP 0318905 A3 19900919; EP 0318905 B1 19940615; AT E107203 T1 19940715; DE 3740750 A1 19890615; DE 3850225 D1 19940721; DK 169907 B1 19950403; DK 671488 A 19890603; DK 671488 D0 19881201
DOCDB simple family (application)
EP 88119856 A 19881129; AT 88119856 T 19881129; DE 3740750 A 19871202; DE 3850225 T 19881129; DK 671488 A 19881201