A method of laser deep penetration welding plates based on prefabricated runners

Abstract

The invention relates to a method for welding a plate by laser deep penetration fusion based on a prefabricated flow channel. The method comprises the following steps: step 1, providing a first workpiece and a second workpiece to be butted; step 2, accurately butting the first workpiece and the second workpiece; step 3, providing a welding workbench, and placing a copper plate on the surface of the welding workbench; step 4, accurately butting the first workpiece and the second workpiece by using a welding clamp and clamping and fixing on the copper plate; step 5, providing an air suction device; step 6, providing a laser welding system; step 7, starting the laser welding system, and enabling a laser beam formed by focusing of a laser welding head to vertically irradiate the surface of theworkpieces; step 8, starting the air suction device; and step 9, after ending laser welding, closing a laser generator and the air suction device, and completing a welding process. The method is capable of, through the prefabricated special flow channel, enabling an internal pressure of a laser deep penetration fusion welding small hole to be balanced and enabling a weld crater to be downwards flowed, and effectively avoiding formation of weld spatter and a weld joint of a nail head.

Description

technical field [0001] The invention relates to the field of welding, in particular to a method for laser deep penetration welding of plates based on prefabricated runners. Background technique [0002] Laser welding is a high-energy-density welding method that uses laser as an energy carrier. It is one of the important aspects of the application of laser processing technology. The application of laser technology in welding has greatly promoted the development of welding technology. Laser welding has fast welding speed. , large depth, small deformation, can be welded at room temperature or under special conditions, and the welding equipment is simple, etc., and has been widely used in the industrial field. [0003] Laser deep penetration welding has the advantages of large depth-to-width ratio of welded joints, fast welding speed, small heat-affected zone, and generally no filler materials. And with the rapid development of fiber lasers with high power and high beam quality...

AI Technical Summary

Problems solved by technology

Due to the high energy density (10 6 ~10 6 W / cm 2 ) under the irradiation of laser beams, deep penetration holes are formed in the process of laser welding stainless steel, which is beneficial to increase the welding penetration and the absorption ratio of laser energy. It makes the welding pool unstable, and the welding holes are easy to collapse, resulting in defects such as spatter, collapse, and hump

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