Motor vehicle heat exchanger is made from brazed aluminum alloy components that are compressed to form homogeneous contact surfaces for brazing

Motor vehicle heat exchanger is made from brazed aluminum alloy components that are compressed to form homogeneous contact surfaces for brazing

The heat exchanger manufacturing process, in which aluminum alloy components (22, 24) are assembled and brazed in a controlled nitrogen based atmosphere, includes the application of pressure sufficient to form homogeneous contact surfaces in the brazing zones, with brazing flux applied only to those...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MESLIN FREDERIC, BERGES DAMIEN
Format: Patent
Sprache:eng ; fre
Schlagworte:
ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING,OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODSSPACES OF VEHICLES
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
VEHICLES IN GENERAL
WELDING
WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:The heat exchanger manufacturing process, in which aluminum alloy components (22, 24) are assembled and brazed in a controlled nitrogen based atmosphere, includes the application of pressure sufficient to form homogeneous contact surfaces in the brazing zones, with brazing flux applied only to those zones where homogeneous contact is not achieved. The pressure is applied with a force of over 100 Newtons at ambient temperature and in line with the direction (D) in which the components are stacked on assembly. L'invention concerne un procédé de fabrication d'un échangeur de chaleur (10) comprenant les opérations consistant à assembler des composants (22, 24) en alliage d'aluminium et à braser lesdits composants sous une atmosphère contrôlée au niveau de zones de brasage desdits composants. Selon l'invention, on applique une pression de contact suffisante pour créer des surfaces de contact homogènes (40, 42) au niveau de tout ou partie desdites zones de brasage, et seules les éventuelles zones de brasage ne présentant pas des surfaces de contact homogènes sont revêtues d'un flux de brasage. Application notamment aux échangeurs de chaleur pour véhicules automobiles.