Arc angle laser welding forming method of angle seam joints

Abstract

The invention relates to an arc angle laser welding forming method of angle seam joints. The method comprises the steps as follows: two plates are positioned, the plate A and the plate B are perpendicular, the distance between the two plates is controlled within the range of 0-0.2 mm, the to-be-welded end surface of the plate B is located between two plate surfaces of the plate A, and the distancebetween the to-be-welded end surface of the plate B and the outer side plate surface of the plate A is in a range of 0.1-0.5 mm; a laser self-fusion welding manner is adopted for welding forming, andthe focus spot diameter of laser beams is 1.5-2.2 mm. A special welding joint splicing form is adopted, the space occupied by surplus height of appropriate weld seams is reserved, the weld seams haverelatively flat surfaces after welding and form smooth arc angle seams, the weld seam appearance requirement is guaranteed, and the weld seam arc angle forming requirement can be better met; a large-focus spot diameter laser welding technology is adopted, welding seam forming can meet the product requirement, simple polishing treatment is needed only in the later period, and stable production with high quality, efficiency and benefits is realized.

Description

technical field [0001] The invention belongs to the technical field of laser welding, and in particular relates to an arc angle laser welding forming method for corner seam joints. Background technique [0002] Corner seam joints are widely used in high-end handicrafts, kitchen and bathroom appliances (including hoods, stoves, towel racks, etc.), food processing, household appliances, etc., and a basic requirement in these industries is that the appearance must be good-looking , Good-looking, so the appearance requirements of these fillet joints are extremely strict. Generally, it is required that the workpiece has no deformation after welding, the weld seam is uniform and smooth, the weld seam has no collapse and no obvious reinforcement, the heat-affected zone of the weld seam is small, and the strength is high enough. [0003] For such high-demand fillet joints, the traditional manufacturing process uses argon arc welding for welding and then post-processing. This manufac...

AI Technical Summary

Problems solved by technology

[0004] 1) Due to the large heat input of argon arc welding, the workpiece will be severely deformed, and time-consuming and labor-intensive artificial correction is required after welding;

[0005] 2) The heat-affected zone of argon arc welding is large, and the color of the base metal around the weld will change, which must be polished or pickled, which greatly increases the workload;

[0006] 3) The welding seam of argon arc welding is high and must be polished. This link will greatly increase labor costs and will drastically reduce production efficiency;

[0007] 4) Due to the difference in the professionalism of the operators, argon arc welding will lead to problems such as insufficient weld strength and a large number of defects. It needs to be repaired and even scrapped, which wastes manpower and material resources;

[0008] 5) The argon arc welding environment is relatively harsh, which will cause great harm to the human body

[0010] 1) Due to the small diameter of the spot (the diameter of the focused spot is 0.3mm to 0.8mm), it is easy to form a weld with a large depth-to-width ratio, and the appearance is not uniform enough and the texture is rough, which cannot meet the appearance requirements of the workpiece;

[0011] 2) Due to the small diameter of the spot, the molten base metal is less during welding, and the weld pool of self-fluxing welding cannot completely cover the seams of the two plates A and B, resulting in the formation of undercut defects

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