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

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 defo...

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Bibliographische Detailangaben
1. Verfasser:	HAEGELE, JUERGEN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING LIGHTING MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	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. Die Erfindung betrifft ein Umformverfahren und eine Umformvorrichtung zum Herstellen eines Eckfalzes (4) für Wärmetauscherrohre mit mindestens zwei Rohrkammem, wobei der Ecktalz mit Hilfe von Rollen umgebogen und gestaucht wird. Um die Geometrie von Wärmetauscherrohren im Bereich des Eckfalzes zu optimieren, wird der Eckfalz (4) in mindestens drei, insbesondere fünf, Stufen umgebogen und gestaucht.