Electric-arc-push-welding and laser-rear-mounted hybrid welding method and device for aluminum alloy

Abstract

The invention discloses an electric-arc-push-welding and laser-rear-mounted hybrid welding method and device for aluminum alloy. The method includes the steps that a welding gun is arranged in the manner that the welding gun inclines by 5-10 degrees relative to the direction perpendicular to the surface of a workpiece, and therefore arc flame can point to a to-be-welded part; and laser beams are on the rear portion of the welding gun in the welding direction. The welding gun and an optical fiber focus lens are assembled together in a hybrid manner, and the electric-arc-push-welding and laser-rear-mounted hybrid heat source configuration is achieved. By means of the method, the welding and bridging capacity of aluminum alloy can be improved by about 20%, pore defects are remarkably relieved, and meanwhile the surface quality of weld joints is ensured; focusing is achieved through the light beam focus lens, and therefore a hybrid welding head can be more compact and simpler, and interference of laser beams and the welding gun is avoided during large-amount focusing; by means of laser beams which are obliquely emitted, it is avoided that perpendicularly-emitted lasers burn the light beam focusing lens when reflected; and an opening is formed in the rear side of the welding gun, and therefore interference of laser beams and the welding gun can be prevented, and the tail portion of a molten pool can be better protected.

Description

technical field [0001] The invention relates to an aluminum alloy welding technology, in particular to a compound welding method and a welding device for an aluminum alloy electric arc push welding laser rear. Background technique [0002] Laser hybrid welding is a new welding method combined with the characteristics of laser welding and arc welding. It has high welding speed, large depth-width ratio, small deformation after welding, can effectively reduce joint softening, and has strong adaptability to joint gaps. Sex, and easy to realize the characteristics of automatic welding. [0003] For arc welding, there are two welding methods according to the direction of the flame: push welding and pull welding. Figure 1a As shown, pull soldering as Figure 1b shown. The arc flame points to the part to be welded, which is push welding; the arc flame points to the welded part, which is pull welding. The surface of aluminum alloy push welding is smooth, the penetration depth is ...

AI Technical Summary

Problems solved by technology

[0006] In arc push welding, if you want to realize the rear position of the laser, on the one hand, the laser head is bulky and difficult to assemble; Shooting and smoke easily damage the lens

[0007] Therefore, there are certain deficiencies in the existing arc push welding laser front or arc pull welding laser post welding methods, and the method of arc push welding laser post can overcome the shortcomings of the above two configuration methods, but it will bring equipment assembly Difficulty and problems of laser interference and lens protection

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