Method of manufacturing heat transfer tubes

Details Method of manufacturing heat transfer tubes Method of manufacturing heat transfer tubes

B - Operations, Transporting

21

D

B21D 53/08 (2006.01) B23K 1/00 (2006.01) F28D 1/03 (2006.01) F28F 1/10 (2006.01)

Patent

CA 2450198

The invention relates to a method of manufacturing heat transfer tubes for a heat exchanger such as an automobile radiator. The tubes are preferably formed of copper or a copper alloy. A sheet of the material is folded into a shape that resembles a B and is brazed together with a brazing material that is free from flux. The brazing material is in the form of a foil or paste. The paste typically includes a powder filler, a binder, and a carrier, which may be a liquid or a wax.

La présente invention concerne un procédé de fabrication de tubes de transfert de chaleur destinés à un échangeur de chaleur tel qu'un radiateur d'automobile. Les tubes sont de préférence formés en cuivre ou en alliage de cuivre. Une feuille de matière est pliée sensiblement en forme de B et brasée à l'aide d'une matière de brasage qui est dépourvue de fondant. La matière de brasage se présente sous forme d'une feuille mince ou d'une pâte. La pâte renferme généralement une charge en poudre, un liant et un support qui peut être un liquide ou une cire.

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