High-speed welding method of thin metal sheet

Abstract

The invention relates to the field of welding, and provides a high-speed welding method of a thin metal sheet. The method comprises the steps of S1, dividing a welding track into a plurality of secondary welding sections; S2, arranging a plurality of welding points in each secondary welding section in advance; and sequentially marking the plurality of welding points; and S3, welding the first welding point in each welding section; then welding the second welding point in each welding section; sequentially welding in the same way until the N welding point in each secondary welding section is welded, and thus finishing sequential connection of the plurality of secondary welding sections and obtaining a complete welding line. According to the method, the thin metal plate can be fixed andprevented from welding deformation through the plurality of welding track sections; the alternative welding manner is performed, so that the heat dissipating time of the welding points can be increased, and the accumulated heat is decreased, and as a result, the weld penetration caused by thermal deformation and heat accumulation can be prevented; and meanwhile, low secondary section welding speedrealizes high overall welding speed.

Description

technical field [0001] The invention relates to the field of welding, in particular to a welding method for thin metal plates. Background technique [0002] Laser welding has the advantages of good forming quality, small heat-affected zone, small workpiece deformation, less subsequent processing, and high flexibility. It is very suitable for welding and forming of thin metal plates. Laser welding can be roughly divided into two types: laser heat conduction welding and laser deep penetration welding according to the different heat conduction mechanisms of welding. [0003] When the laser heat input exceeds a certain threshold, the welding mode changes from heat conduction welding to deep penetration welding with "keyhole effect", thereby realizing full penetration welding of metal sheets. Under the condition of full penetration of metal thin plate laser deep penetration welding, when the laser heat input is low, the welded shape of the thin plate is in the shape of a nail he...

AI Technical Summary

Problems solved by technology

[0004] However, under the condition of full penetration of laser deep penetration welding of metal sheets, a large heat input is required to obtain an hourglass-shaped (X-shaped) weld

However, for sheet metal welding, large heat input will cause adverse effects such as increased thermal deformation of the sheet metal and widening of the heat-affected zone, which will greatly affect the quality of the welded sheet metal.

Therefore, when using the prior art to weld metal sheets, there are disadvantages such as slow welding speed and large welding deformation.

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