High-strength laser welding method and device of dissimilar metal assembly part

Abstract

The invention provides a high-strength laser welding method of a dissimilar metal assembly part. The high-strength laser welding method comprises the steps of (1) clamping an A metal upright post by adopting a positioning die, and keeping fixed; (2) heating the upper end of the A metal upright post to a softening state; (3) inserting the upper end of the A metal upright post which is induced, heated and softened into a copying hole of a B metal base so as to obtain a dissimilar metal laser welding preassembly part; (4) starting an ultrasonic vibration source connected with a positioning die assembly, and turning on laser, so that a laser welding head is driven to perform penetration fusion welding by an XYZ three-axis moving system along the contour line of the connecting surface of the A metal upright post and the B metal base; and (5) moving the dissimilar metal laser welding assembly part to a conveying belt, and then falling into a material box. According to the high-strength laser welding method, the welding effects of no filler, large penetration and narrow welding seam can be realized, so that the dimensional accuracy of the laser welding seam is greatly increased. The invention further provides a high-strength laser welding device of the dissimilar metal assembly part.

Description

technical field [0001] The invention belongs to the field of laser welding, and in particular relates to a high-strength laser welding 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 hydrogen 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 to it...

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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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