Ultrasound-assisted laser brazing method and device for dissimilar-metal assembly piece

Abstract

The invention provides an ultrasound-assisted laser brazing method for a dissimilar-metal assembly piece. The ultrasound-assisted laser brazing method for the dissimilar-metal assembly piece comprises the steps that (1) a locating die is used for clamping a A-metal stand column; (2) the upper end of the A-metal stand column is heated to be soft; (3) the upper end, which is induction-heated and softened, of the A-metal stand column is inserted into a profiling hole of a B-metal base, and then a dissimilar-metal laser welded preassembly piece is obtained; (4) an ultrasonic vibration source connected with a locating die assembly is started, the laser is emitted out, under the auxiliary action of an ultrasonic vibration composite energy field, a laser-MIG composite welding head conducts melt-brazing along the outline of a connection face of the A-metal stand column and the B-metal base; and (5) the dissimilar-metal laser welded assembly piece is transfers to a conveyer belt and then falls into a material box. By the adoption of the ultrasound-assisted laser brazing method for the dissimilar-metal assembly piece, the large-fusion-depth narrow-weld-joint welding effect can be achieved, and a welded connector better in metallurgical quality is obtained. The invention further provides an ultrasound-assisted laser brazing device for the dissimilar-metal assembly piece.

Description

technical field [0001] The invention belongs to the field of laser welding, and in particular relates to an ultrasonic-assisted laser brazing method and device for dissimilar metal assemblies. Background technique [0002] Welding of dissimilar metal materials is an effective way to solve components to meet various performance requirements at the same time. There are many welding methods, such as argon arc welding, resistance welding, friction welding, electron beam welding and laser welding. Compared with other welding methods, laser welding has the characteristics of concentrated heat source density, large weld depth-to-width ratio, small heat-affected zone, and good controllability. Compared with electron beam welding, laser welding has lower requirements for the atmosphere and usually does not require a vacuum environment. . [0003] However, compared with traditional arc welding and other welding methods, laser welding requires high precision of welding clamping due t...

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Problems solved by technology

[0003] However, compared with traditional arc welding and other welding methods, laser welding requires high precision of welding clamping due to its narrow weld seam and large penetration depth.

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