The power of the green laser pointer is big

Laser to fill the mold welding, laser welding is one of the important aspects of laser processing of materials processing technology. 1970s is mainly used for welding thin-walled materials and low-speed welding, the welding process is heat conduction, laser radiation heating the surface, the surface heat transfer through the heat transfer-oriented internal proliferation by controlling the width of the laser pulse energy, peak power and repetition rate and other parameters , so that the workpiece to melt, the formation of specific bath. Laser welding as a high-quality, high-precision, low distortion, high efficiency and high-speed welding method, along with the improvement of high power CO2 and high-power YAG laser and fiber optic transmission technology, the metal molybdenum welding bunching objective developed. And the show ofgreen laser pointercan not changed for the limited internal memory.
It in the machinery manufacturing, aerospace, automotive, powder metallurgy, biomedical microelectronics industry and other fields of application more widely. The current study focused on the C02 laser and YAG laser welding of various metallic materials theory, including the splitting of the laser-induced plasma, absorption, scattering properties and laser welding intelligent control, hybrid welding, laser welding phenomena and the behavior of holes mechanism and prevention methods of welding defects, and nickel-base alloy, aluminum and magnesium alloy welding, welding phenomena modeling and numerical simulation, the connection of the material of steel, copper, aluminum and dissimilar materials, laser The joint performance evaluation and other aspects of the study [1]. green laser pointer is stable in performance.
Laser welding principle: laser welding is a high-intensity laser beam radiation to the metal surface through the interaction of the laser and the metal, the metal absorbs laser light is converted into heat to make molten metal cooling and crystallization of the formation of welding. The mechanism of laser welding in two ways: heat conduction welding material when the laser irradiation in the material surface, part of the laser is reflected, part of the material absorbed light into heat energy, heating and melting the surface layer of hot thermal conductivity continue to depths of the pass, the last two welding parts weld together. Laser deep penetration when the power density of laser beam to the surface, the material absorbed light energy converted to heat, the material is heated to melting to vaporization, resulting in a large number of metal vapor. The wavelength of green laser pointeris 532nm.
Steam exit surface reaction, so that the molten metal liquid squeezed to four weeks, the formation of pits, pit wear to continue with the laser irradiation, a deeper, when the laser stops after irradiation pit surrounding melt back cooling and solidification after welding two welding - since. Both welding mechanism based on actual material properties and welding need to select different welding mechanism by regulating the laser welding parameters. This in two ways the most basic difference: the former pool surface and remain closed, while the latter bath is a laser beam to penetrate into the hole. Conduction welding small perturbation of the system, because the radiation of the laser beam does not penetrate the welded materials. The body material of this kind of green laser pointer is the brass.
Therefore, conduction welding process weld difficult to be gas invasive; deep penetration, the continuous closure of holes can lead to holes. Conduction welding and deep penetration can also be converted each other in the same welding process, and by conduction to the holes to change the way depends on the peak laser energy density imposed on the workpiece and the laser pulse duration. The time dependence of the laser pulse energy density of the laser welding by a welding laser interaction with the material during the transition to another way, namely, in the course of interaction between weld can be first formed in the conduction, and then change for holes. Expansion of application fields of laser welding is mainly used. Of course, different output powers of green laser pointer can be customized.