Laser Welding
The laser welding technology has a solution purification effect, which can purify the weld metal and is suitable for welding between the same and different metal materials. Laser welding has a high energy density and is particularly advantageous for metal welding with high melting point, high reflectivity, high thermal conductivity and physical properties.
Laser welding, which is used to reduce the power of a laser beam when cutting metal, and the material is locally melted and bonded together by the interaction of the laser and the material. However, the wavelength of 10.6 μm CO2 laser and the YAG laser with a wavelength of 1.06 μm are mostly reflected on the metal surface, and the absorption rate is low. However, when the metal reaches a molten state, the absorption rate rises sharply, which provides favorable conditions for laser welding.
Currently used lasers are YAG lasers, CO2 lasers, and semiconductor pump lasers. When the above lasers are used, the plastic materials used are not only required to be large in quantity, but also have many types of use and high technology content, and are the best fields for obtaining high economic benefits in the plastic product processing industry. Therefore, in the processing of plastic products, people are eager for a more rapid, effective and clean plastic welding method.
With advances in materials and equipment, laser welding technology has been recognized by manufacturers as a specialized method of joining plastic products, mainly for connecting sensitive plastic products (including circuit boards), plastic parts with complex geometries and Plastic products (medical equipment) with strict cleaning requirements, etc. Most of the natural plastics and many colored translucent plastics can be laser welded, such as polystyrene (PS), polyvinyl chloride (PVC) and polyphenylene (PP).
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