The invention discloses a vacuum
brazing method of a double-path rotating joint. The vacuum
brazing method comprises the flowing steps of S1,
processing of an upper cover plate; S2,
processing of a middle cover plate; S3,
processing of a lower cover plate; S4, pre-
welding surface treating of the upper cover plate, the middle cover plate and the lower cover plate; S5, making of brazed
filler metal by
laser cutting, specifically, the thickness specification chosen for the brazed
filler metal is 0.05 mm, and the overall dimension of the brazed
filler metal is 2-3 mm bigger than a contact surface of an adjacent
spare part; S6, pre-
welding assembling; and S7, vacuum
brazing, specifically, a half-finished double-path rotating joint is put into a vacuum aluminum brazing furnace, a work fixture is used for assembling the half-finished double-path rotating joint, a vacuum brazing temperature process curve is set, the vacuum aluminum brazing furnace is coarsely vacuumized and then highly vacuumized, the half-finished double-path rotating joint and the brazed filler
metal are heated according to the set vacuum brazing temperature process curve, heat is preserved for 15-20 min under the temperature of 615 DEG C, and after heat preservation is completed, cooling along with the furnace is conducted, so that vacuum brazing is realized. The vacuum brazing method of the double-path rotating joint has the beneficial effects of simplifying production processes, enhancing production efficiency, reducing
welding torsion, and enhancing size precision and
corrosion performance.