Laser welding with filler wire method of aluminum alloy T-type shapes for boat

Abstract

The invention is a laser filler wire welding method of marine aluminum alloy T-shaped section bar which belongs to laser materials processing technology field. Fix the vertical plate (5) and horizontal plate (4) rigidly in 90degreebefore welding, the laser beam (2) incidents obliquely in the angle of 30degree-45degreewith horizontal plate (4), welding wire (1), laser beam (2) and nozzle (3) are in same surface and in 30 degree to 60 degreeeach other, the incident laser beam and the working point of workpiece are on vertical board and have a slippage of 0.3 to 0.8mm on the horizontal plate surface, the laser beam and the photoproduced plasma body melts welding wire and generates deep weld penetration between vertical plate (5) and horizontal plate (4), it realizes the welding and shaping of marine aluminum alloy T-shaped section bar through twice welding. The method improves the stability of welding process, process is simple, can create a variety of marine aluminum T-shaped section bar, the prepared aluminum alloy T-shaped section bar has small deformation, stable dimension and excellent overall performance.

Description

technical field [0001] The invention relates to a laser wire-filling welding method for marine aluminum alloy T-shaped profiles, and belongs to the technical field of laser material processing. Background technique [0002] Aluminum alloy has the characteristics of small specific gravity and elastic modulus, corrosion resistance, weldability, easy processing, non-magnetism and good low temperature performance. It is used in the shipbuilding industry and has the following advantages. (a) Due to the reduced weight of the ship, the capacity of the single engine can be reduced, and the speed can be increased; fuel consumption can be reduced and energy saved; the aspect ratio of the ship can be improved, the stability can be increased, and the ship is easy to maneuver; the load capacity can also be increased, Get extra profit. (b) It has good corrosion resistance, can reduce maintenance costs such as oiling, and has a long service life (generally more than 20 years). (c) Good p...

AI Technical Summary

Problems solved by technology

In this case, the welding process mainly uses filler metal to increase the height of the fillet weld leg to improve the connection strength of the weld. Due to the insufficient penetration of the weld, the single-pass weld cannot completely fill all the gaps between the joints. Only by adding Beveling and multi-pass welding can only be realized, so the T-shaped profile welded by this method has a large amount of deformation, it is difficult to guarantee the size, the joint performance is poor, and the applicability to different structures is poor

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