A Design Method of Anti-pollution Air Knife Structure for Welding Laser Lens

Abstract

The invention discloses a design method of an anti-pollution air knife structure for a welding laser lens, which includes determining the installation position of the main body of the air knife, determining the reference plane position of the air outlet of the air knife, and designing the shape and size of the air outlet of the air knife. It is a T-shaped air outlet, and the reference plane of the air knife outlet is the plane where the top of the T-shaped air outlet is located. The size of the T-shaped air outlet is based on the parameters of the laser lens and the distance H between the reference plane of the air knife outlet and the plane where the laser focusing lens is located. Design, the height h of the upper part of the T-shaped air outlet 1 , width w 1 and the height h of the lower part of the T-shaped air outlet 2 , width w 2 The following formula needs to be satisfied: w 1 h 1 =w 2 h 2 , the design method can quickly and easily realize the design of the anti-lens pollution air knife, and the designed air knife has excellent lens protection effect.

Description

technical field [0001] The invention relates to a structural design method of an anti-pollution air knife for a welding laser lens, belonging to the technical field of welding. Background technique [0002] Laser and laser arc hybrid welding technology is one of the high-efficiency welding methods that have developed rapidly in recent years. It has the advantages of fast welding speed, small heat-affected zone, small welding stress and deformation, stable welding, and high reliability. It is gradually applied to various plate thicknesses. In the manufacture of dimensional components. However, in the process of production and application, the laser lens works in the welding area for a long time, and the spatter, dust, metal vapor, and plasma generated by the welding heat source can easily cause pollution of the lens in the lens, which in turn affects the stability of the process. Generally, it is necessary to use a horizontal air knife to form an air curtain to protect the l...

AI Technical Summary

Problems solved by technology

The air outlet of the traditional anti-lens pollution air knife mostly adopts a straight structure, and is not designed in conjunction with the laser lens parameters

Due to the laser and laser arc hybrid welding process, the generated welding fume, plasma volume is large, the splash speed is fast and the size is large, and it is easy to contaminate the lens

Especially at smaller focal lengths and larger lens diameters, lenses are more susceptible to contamination

If the traditional air knife structure is used, there may be poor protection. The protection effect needs to be tested through experiments, and then the design of the air knife is repeatedly revised according to the test record. The process is complicated and cannot achieve a good protection effect.

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