1. The working principle and typical application scenarios of handheld laser welding machine
Handheld laser welding machine is a kind of welding equipment using laser technology. It consists of laser, optical system, welding torch, etc., which can focus the laser beam to the surface of the workpiece and produce high energy density heat, thus realizing rapid melting and welding. Compared with the traditional arc welding, handheld laser welding has the advantages of high precision, high efficiency, simple operation and beautiful weld seam. Mainly used in metal processing, electrical products processing, automotive manufacturing and other industries.
2. Description and function of protective gas types
(1) Types and introduction of protective gases
Helium: more expensive, but most effective, allowing the laser to pass through unimpeded and directly to the surface of the workpiece.
Argon: cheaper, denser, better protection, the surface of the weldment is smoother than helium, but susceptible to high-temperature metal plasma ionization, will shield part of the beam to the workpiece, reducing the effective power of the welding, welding speed and depth of fusion is impeded.
Nitrogen: cheapest, but not suitable for some stainless steel welding.
(2) Role of protective gases
1. Protect the workpiece in the welding process is oxidized, laser welding machine using protective gas, to set the protective gas, and then out of the laser, can prevent the laser welding machine in the continuous processing process, the pulse laser oxidation phenomenon.
2. Protect the focusing lens from metal vapor contamination and liquid droplet sputtering, especially high-power welding, because the ejecta is very powerful, so it is necessary to protect the lens.
3. Protective gases can effectively improve the quality of the weld, different gases have different effects on the flow of the molten pool, wetting and other properties, thus affecting the quality of the weld formation.
4. Suitable shielding gas can improve heat transfer, improve the utilization of laser energy, thereby increasing the welding speed.
Therefore, it is very important to select the correct shielding gas for handheld laser welding. Different materials, welding processes, and equipment parameters all have an impact on the choice of shielding gas. Only by choosing the right shielding gas can we optimize the performance of our handheld laser welding machines and obtain high quality welding results.
Post time: Jun-13-2024