A welding device for eliminating air holes in laser welding

Abstract

The invention relates to the field of laser welding devices, in particular to a welding device for eliminating air holes in laser welding, including a platform, a moving structure, a welding structure, an eliminating structure, a clamping structure and a jacking structure; by installing the moving structure on the top of the platform , can realize the precise and smooth movement of the laser welding torch, thereby increasing the welding quality, and with the setting of the welding structure, not only the welding torch can be clamped and fixed, but also the installation and disassembly of the welding torch can be facilitated. Through the movement of the welding structure, the effect of eliminating the welding bubbles can be realized, thereby greatly improving the welding quality. By installing a clamping structure at one end of the platform, not only can the plate to be welded be clamped and fixed, but the plate can be effectively avoided. In case of misalignment, it can also ensure that the butt joint of the plates is just below the welding torch, so as to facilitate welding of different types of plates.

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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