Double-sided gas-assisted device for pulse laser welding of metal sheets

Abstract

The invention relates to a double-sided gas-assisted device for pulse laser welding of metal sheets. The double-sided gas-assisted device comprises a base. A cavity used for containing the at least two to-be-welded metal sheets in a flatly-lied manner is formed in the base. A pulse laser beam is arranged above the slicing seam of every two adjacent metal sheets. A through groove is formed below the slicing seam of every two adjacent metal sheets. A gas inlet insert is arranged on the portion, at one ends of the through grooves, of the base. An upper gas inlet hole facing the upper surfaces of the metal sheets and a lower gas inlet hole facing the lower surfaces of the metal sheets are formed in the gas inlet insert. The double-sided gas-assisted device is simple and reasonable in structural design, the problems that in the prior art, it is difficult to control the welding size precision of the metal sheets, surface oxidation is severe, the energy consumption is high, efficiency is low and safety is low are solved, and the defects in the prior art are overcome.

Description

technical field [0001] The invention relates to a double-sided gas auxiliary device for pulse laser welding of thin metal plates. Background technique [0002] Pulse laser is a way of energy radiation, which has the characteristics of fast speed, high efficiency, strong penetrability and high precision. With these characteristics, pulsed laser technology is used in the welding process in the assembly process of related structural parts, and has been widely used in advanced manufacturing industries such as aircraft, automobiles, and navigation equipment in recent years. [0003] The main problems and defects of the existing metal sheet laser welding experimental process are as follows: [0004] (1) The sample lacks multi-directional positioning and fixing during the laser welding experiment process, and the release of residual stress generated by laser welding leads to serious distortion and deformation of the welded joints, and the welding dimensional accuracy is difficult ...

AI Technical Summary

Problems solved by technology

[0004] (1) During the laser welding experiment, the sample lacks multi-directional positioning and fixation. The release of residual stress generated by laser welding leads to serious distortion and deformation of the welded joints, and the welding dimensional accuracy is difficult to control;

[0005] (2) During the laser welding process, the metal is in a high-temperature molten state, exposed to the air, absorbing oxygen and hydrogen, resulting in obvious oxidation of the metal surface, affecting the appearance and surface quality;

[0006] (3) Due to the large amount of heat input and the low energy utilization rate of continuous laser welding, excessive processing speed may easily cause metal flying chips, and the safety of production and processing is low

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