LASER NEWS

The challenges of laser welding copper are related to two main physical properties of the material: low absorptivity to most high-power industrial lasers and high thermal conductivity during the process. We know that the absorption rate of copper increases with decreasing wavelength, which means that lasers in the visible band will yield significant advantages for copper welding. Infrared lasers create absorption problems when dealing with solid materials. If the material melts or even evaporates by deep penetration welding, its absorption rate increases significantly. The absorption rate of solid copper is less than 4%, while the absorption rate of copper vapor (keyhole penetration welding) is higher than 60%. This absorption problem can be overcome by very high power densities, which greatly speed up the melting and evaporation of copper and thus increase its absorption.

A beam with high energy density is one of the advantages of laser cutting so that the focal spot diameter will be as small as possible in order to create tiny gaps. Because of the smaller depth of focus of the focusing lens, the smaller the diameter of the focal spot. High-quality, high-precision cutting, the effective depth of focus of the lens diameter and another material is cut, and therefore control the focus position, and the cutting surface of the material is very important.

Daily use and maintenance instructions of fiber laser cutting machine Fiber laser cutting machine is a laser cutting machine that uses a fiber laser generator as a light source. Fiber laser is a new type of fiber laser. The laser head outputs a laser beam with high energy density and gathers it on the surface of the workpiece, so that the area irradiated by the ultra-fine focus spot on the workpiece is instantly melted and vaporized, and the spot irradiation position is moved by the numerical control mechanical system. And realize the automatic cutting of non-contact processing, with high speed and high precision.

What are the industries that require the use of laser welding heads? At present, laser welding heads have penetrated into our lives and are more and more widely used, especially in many industries, gradually replacing the traditional welding methods of welding heads.