Laser welding method for polyhedral structure

Abstract

The invention discloses a laser welding method for a polyhedral structure. A joint of any two connected to-be-welded connecting surfaces of the polyhedral structure forms a to-be-welded gap, a plurality of sections of to-be-welded gaps are connected to form a welding seam track, and a connecting area of the two connected sections of to-be-welded gaps is a transition welding area. The laser welding method comprises the steps that when welding is conducted to a starting point of the transition welding area, the polyhedral structure rotates around the rotation axis, meanwhile, a welding head correspondingly moves along with rotation of the polyhedral structure, and follow-up is that the welding head moves along with the movement track of the transition welding area; when the welding head moves to the end point of the transition welding area, the to-be-welded gaps to be welded are just located at the horizontal position or the vertical position, and the polyhedral structure stops rotating; and in the moving process of the welding head, laser of the welding head is continuously output. By the adoption of the laser welding method of the polyhedral structure, continuous light emitting welding can be achieved, so that the welding efficiency is improved, and the quality of welding seams is improved.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a laser welding method of a polyhedron structure. Background technique [0002] At present, the laser welding of the polyhedral structure usually needs to turn the polyhedron several times, and the laser welding needs to be interrupted during the turning process, for example, the gap between the shell of the aluminum shell battery and the side of the positive and negative cover plates is welded by laser welding. During the process, the aluminum shell battery needs to be turned over at least three times, and the laser welding operation needs to be interrupted at least three times. Such a laser welding method makes the whole welding time longer, so that the welding efficiency is lower; at the same time, because the welding head needs to turn on and off the laser output more frequently, a sudden change of thermal influence will occur at the welding position, thereby affecting ...

AI Technical Summary

Problems solved by technology

Such a laser welding method makes the entire welding time longer, resulting in lower welding efficiency; at the same time, because the welding head needs to turn on and off the laser output more frequently, a sudden change in thermal influence will occur at the welding position, thereby affecting the quality of the weld seam

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