Global Patent Index - EP 1952904 A3

EP 1952904 A3 2009-02-18 - Forming process and forming device for the production of a fold in a heat exchanger tube

Title (en)

Forming process and forming device for the production of a fold in a heat exchanger tube

Title (de)

Umformverfahren und Umformvorrichtung zum Herstellen eines Eckfalzes für Wärmetauscherrohre

Title (fr)

Procédé de déformation et dispositif de déformation pour la formation d'un pliage dans un tube d'échangeur de chaleur

Publication

EP 1952904 A3 (DE)

Application

EP 08000606 A

Priority

DE 102007005590 A

Abstract (en)

[origin: EP1952904A2] The method involves bending and compressing corner seams (4) of a metal strip (1) in three bending stages and two compression stages by using upper and lower rollers. A chamfer is impressed at a free end of the corner seams in the compression stages. A ring groove of the rollers is provided for deforming the corner seams, and the rollers are emanating from groove flanks. A wedge-shaped opening is provided between the corner seams and the groove flanks. An intermediate space is provided at an inner side of the corner seams. An independent claim is also included for a deformation device for manufacturing corner seams for a heat exchanger pipe.

IPC 8 full level (invention and additional information)

B21D 5/12 (2006.01); B21D 5/08 (2006.01); B21D 53/04 (2006.01); B21D 53/08 (2006.01); F28D 1/00 (2006.01); F28F 1/00 (2006.01)

CPC (invention and additional information)

B21D 19/043 (2013.01); B21C 37/14 (2013.01); F28D 1/0391 (2013.01); F28F 1/022 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA MK RS

DOCDB simple family

EP 1952904 A2 20080806; EP 1952904 A3 20090218; EP 1952904 B1 20120829; DE 102007005590 A1 20080807