Soldering flat tubing to zigzag supports to make flat tube heat exchanger - using solder paste dispensing device to simultaneously coat both sides of tubing prior to heating

Welding the flat tubular pts. of a heat exchanger to the zig-zag shaped conductor supports consists of applying a solder paste to the stretches which are to contact the supports using a metering device with side nozzles. After assembling in a holding frame the solder areas are heated to soldering te...

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Bibliographische Detailangaben
Hauptverfasser:	KERSTNER, RALPH, 6231 SCHWALBACH, DE, THOMAE, RUDOLF., 6900 HEIDELBERG, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION DIFFUSION TREATMENT OF METALLIC MATERIAL HEAT EXCHANGE IN GENERAL HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINE TOOLS MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS SOLDERING OR UNSOLDERING SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	Welding the flat tubular pts. of a heat exchanger to the zig-zag shaped conductor supports consists of applying a solder paste to the stretches which are to contact the supports using a metering device with side nozzles. After assembling in a holding frame the solder areas are heated to soldering temp. The paste pref. contains a flux which ensures the removal of oxide coating prior to soldering. The middle third of the tube side is coated with the paste that contains a metal alloy powder whose melting point is 400-460 deg.C. ADVANTAGE - Economic method of producing good solder joints using light metal, esp. Al heat exchanger.