Welding device for eliminating laser welding air holes

Abstract

The invention relates to the field of laser welding devices, in particular to a welding device for eliminating laser welding holes. The welding device comprises a platform, a moving structure, a welding structure, an eliminating structure, a clamping structure and a jacking structure. By installing the moving structure at the top end of the platform, accurate and stable movement of a laser welding gun can be achieved, so that the welding quality is improved, the welding gun can be clamped and fixed by being matched with the arrangement of the welding structure, and the welding gun can be conveniently mounted and dismounted; the eliminating structure is installed at one end of the welding structure, the effect of eliminating welding bubbles can be achieved through movement of the welding structure, and therefore the welding quality is greatly improved; and the clamping structure is installed at one end of the platform, to-be-welded plates can be clamped and fixed, the situation that the plates are dislocated during welding can be effectively avoided, and it can be guaranteed that the butt joint position of the plates is just located under the welding gun, and therefore the plates of different models can be welded conveniently.

Description

technical field [0001] The invention relates to the field of laser welding devices, in particular to a welding device for eliminating air holes in laser welding. Background technique [0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding is one of the important aspects of the application of laser material processing technology. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process is heat conduction, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse and other parameters to melt the workpiece and form a specific molten pool. Due to its unique advantages, it has been successfully applied in the precision welding of micro and small parts. [0003] However, in the pr...

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Problems solved by technology

[0003] However, in the process of laser welding, the inside of the laser welded small hole is in an unstable vibration state, the flow of the small hole and the molten pool is very violent, and the metal vapor inside the small hole erupts outwards to cause the steam vortex at the opening of the small hole, which will The shielding gas (Ar) is drawn into the bottom of the small hole. As the small hole moves forward, the shielding gas will enter the molten pool in the form of bubbles. Due to the extremely low solubility of Ar and the fast cooling speed of laser welding, the bubbles have no time to escape. It is left in the weld seam, forming air holes, which greatly reduces the welding quality

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