The invention discloses a
flame brazing process method for
stator coil bars and connector plates of a power generator. The
flame brazing process method comprises the following steps: removing oxides and pollutants in a
brazing area and the surfaces of brazing materials through mechanical cleaning and
organic solvent cleaning; wrapping insulation parts of the coil bars with water-soaked fireproof cloths; placing brazing pieces between the end parts of the coil bars and the connector plates, and clamping and fixing the brazing pieces by clamping tools; heating a brazed joint by a double-end
welding torch, aligning two air nozzles of the
welding torch with the connector plates at the two sides of the joint respectively, adjusting the
welding torch to heat by virtue of a
flame, enabling the double-end
welding torch to move back and forth at a
constant speed along the connector plates at the two sides during the heating process, and meanwhile, uniformly heating connection plates at the two sides, starting to fill with brazing wires when an area to be brazed is heat to dark red, and stopping heating after surrounding brazing seams are fully filled; and after the joint is cooled, mechanically removing oxides and redundant brazing materials on the surface of the joint. The flame brazing process method disclosed by the invention is simple, convenient and practicable, high in applicability, and capable of remarkably improving
heating efficiency, temperature uniformity and joint brazing quality relative to a conventional flame brazing process.