Method for producing metallic tube of heat exchanger, involves breaking tubes at breaking points between roller pairs, where tubes are loaded with laminar contact pressure during breaking and sufficient breaking load is transmitted to tubes

The method involves providing endless metallic roller belts (R1-R3) with breaking points on a rolling mill, and shaping the belts to tubes, where the belts are made of aluminum sheet. The tubes are broken at the breaking points between two roller pairs, where the roller pairs have speed difference....

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Bibliographische Detailangaben
Hauptverfasser:	KAESINGER, RAINER, SCHMID, MANFRED
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BROACHING FILING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOTOTHERWISE PROVIDED FOR MACHINE TOOLS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PLANING PUNCHING METAL SAWING SCRAPING SHEARING SLOTTING TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING
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Beschreibung
Zusammenfassung:	The method involves providing endless metallic roller belts (R1-R3) with breaking points on a rolling mill, and shaping the belts to tubes, where the belts are made of aluminum sheet. The tubes are broken at the breaking points between two roller pairs, where the roller pairs have speed difference. The tubes are loaded with laminar contact pressure during breaking, and sufficient breaking load is transmitted to the tubes to be broken. The contact pressure is exerted on the tubes between two conveyor belts between which the tubes are transported. An independent claim is also included for a rolling mill for producing a metallic tube of a heat exchanger. Die Erfindung betrifft ein Herstellungsverfahren für Rohre (1), insbesondere zum Einsatz in Wärmetauschern, aus wenigstens einem metallischen Band auf einer Walzenstraße, wobei das Band auf einer Walzenstraße mit Sollbruchstellen versehen, umgeformt, zum Rohr zusammengeführt und schließlich die Rohre an den Sollbruchstellen zwischen zwei eine Geschwindigkeitsdifferenz aufweisenden Walzenpaaren abgerissen werden. Das Verfahren wird hinsichtlich des Abreißens einzelner Rohre erfindungsgemäß dadurch verbessert, dass das Rohr wenigstens im Moment des Abreißens mit einer flächigen Anpresskraft (Ak) belastet wird und eine ausreichende Reißkraft (Rk) erzeugt und auf das abzureißende Rohr übertragen wird. Es werden auch eine dementsprechende Walzenstraße und eine Abreißvorrichtung vorgeschlagen.