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What Is Laser Welding? Laser Welding Process Manual

Views: 233     Author: Site Editor     Publish Time: 2023-03-22      Origin: Site


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What Is Laser Welding? Laser Welding Process Manual

What is laser welding? Laser welding is a new type of welding method, which is mainly aimed at welding thin-walled materials and precision parts. It can realize spot welding, butt welding, lap welding, sealing welding, etc., with high depth-to-width ratio, small weld width, and small thermal influence. Small deformation, fast welding speed, smooth and beautiful welding, no need to deal with after welding or only need simple treatment, high welding quality, no porosity, precise control, small spotlight, high positioning accuracy, easy to realize automation. It is precisely because of so many advantages of laser welding that laser welding plays an important role in the application of laser material processing technology.

The welding process is a heat conduction type, 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 parameters such as the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully applied to the welding of micro and small parts. The emergence of high-power CO2 and high-power YAG lasers has opened up a new field of laser welding. The deep welding based on the small hole effect has been obtained, and it has been increasingly widely used in industrial sectors such as machinery, automobiles, and steel.

1500w fiber laser welding machine

Compared with other welding techniques, the main advantages of laser welding are: fast laser welding speed, large depth and small deformation. It can be welded at room temperature or under special conditions, and the welding equipment is simple to install. For example, when the laser passes through the electromagnetic field, the beam will not deviate; the laser can weld in air and certain gas environments, and can weld through glass or materials transparent to the beam.
After the laser is focused, the power density is high. When welding high-power devices, the aspect ratio can reach 5:1, and the highest can reach 10:1. It can weld refractory materials such as titanium, quartz, etc., and can weld heterogeneous materials with good results. For example, the pass rate of copper and tantalum, two materials with completely different properties, is almost 100%. Micro welding is also possible. After the laser beam is focused, a very small spot can be obtained, and it can be precisely positioned. It can be applied to the assembly and welding of micro and small components in mass automatic production, such as integrated circuit leads, watch hairsprings, and electron gun assembly of picture tubes. Laser welding not only has high and high production efficiency, but also has a small heat-affected zone and no pollution to the solder joints, which greatly improves the quality of welding.

The role of laser welding:
It can weld inaccessible parts, implement non-contact long-distance welding, and has great flexibility. The use of optical fiber transmission technology in YAG laser technology has made laser welding technology more widely promoted and applied. The laser beam is easy to realize beam splitting according to time and space, and can perform multi-beam simultaneous processing and multi-station processing, which provides conditions for more precise welding.

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