The invention provides a
laser welding-
brazing packaging method and device for a three-dimensional weld joint. The method comprises the steps of step S1, carrying out surface treatment on a joint of ato-be-
connected device, and selecting low-temperature
brazing filler metal with a proper size; step S2, performing in-situ melting on the low-temperature
brazing filler metal through
laser melting brazing, spraying the molten brazing
filler metal to the joint through high-pressure
airflow, and completing preliminary connection through an auxiliary
wetting and filling method; and step S3, after the brazing filler
metal is sprayed, applying a second
laser to heat the brazing filler
metal again for secondary remelting, conducting heat preservation aftertreatment on the weld joint after a periodof time, and completing metallurgical connection. According to the technical scheme, three heating procedures are adopted to sequentially complete melting, filling,
wetting and interface reaction of the brazing filler
metal, and rapid low-temperature
welding is achieved; and compared with traditional one-time laser
welding, the method has the advantages of being more sufficient in
wetting and spreading, good in weld joint integrity, high in welding performance and surface quality and low in
residual stress.