Vacuum brazing device for aluminum and aluminum alloy workpieces

The utility model discloses a vacuum brazing device for aluminum and aluminum alloy workpieces. The vacuum brazing device comprises a magnesium steam generating chamber, a brazing chamber and a magnesium collecting chamber, wherein the magnesium steam generating chamber, the brazing chamber and the magnesium collecting chamber are hermetically communicated with one another through ducts; a heating device is arranged in the magnesium steam generating chamber; and a collecting copper net with a cold water pipeline is arranged in the magnesium collecting chamber. The vacuum brazing device disclosed by the utility model has the advantages of simple structure and high brazing efficiency. In the process of brazing aluminum and aluminum alloy workpieces with complex structures, the vacuum brazing device is placed in a vacuum brazing furnace, so that oxide films on the surfaces of the aluminum alloy workpieces can be efficiently removed, therefore the utilization ratio of braze materials is improved, the brazing performance and quality of braze-welded workpieces are largely improved, the brazing yield of the aluminum alloy workpieces with the complex structure is improved, and the purpose of saving resources is achieved.