| 摘要 |
PURPOSE:To solder and join the plural joining parts of a tubular structural body simultaneously, by enclosing the joined parts of said body with split sleeves which are provided with a brazing material layer or solder layer on the inner side and heating the same. CONSTITUTION:In joining aluminum tubular bodies 1, 2, the joining parts are enclosed with split sleeves 3, 3' of aluminum or an aluminum alloy provided with a brazing material layer or solder layer 4 and are fixed with jigs from the outside, whereafter the joining parts are brazed and joined by heating. The method of brazing in this case may be any of torch brazing wherein a flux is used, brazing in a furnace, vacuum brazing or brazing in an inert gaseous atmosphere. The brazing material layer to be covered on the sleeves is selected according to the brazing method; usually, an Al-Si alloy or said alloy added with the other additive element such as Mg is used. The layer of Zn solder or the like is provided in the case of applying soldering. |
