Laser welding uses laser pulse of high energy to partially heat the micro area of materials, the energy of laser radiation is diffused to the inside of material through heat conduction, and after the materials are melted special molten pool will be formed so as to realize the purpose of welding. It is a new type of welding method. The laser welding is mainly applicable to the welding of thin wall materials and precise parts, which can realize spot welding, butt welding, overlaying welding and seal welding etc. The series products are widely used for continuous welding of thin wall parts and spot welding of precise parts, such as sensors, small pressure vessels, optical fiber coupling appliances, transformers, Li batteries, clocks and watches, glasses, medical appliances, electronic parts, precise connectors, crafts and other precise parts. The laser welding machine produced by Nange Company has such advantages as high welding depth-width rate, small welding seam width, small heat influencing area, small deformation, rapid welding speed, flat and beautiful welding seam, simple treatment or free of treatment after welding, high welding seam quality, free of bubble, precise control, small focalizing light spot, high locating precision and easy to realize automation etc. Laser medium Nd+:YAG Laser wavelength 1064 nm Minimum facular diameter 0.2 mm Average output power 150 / 500W Single pulse parameter 50J Pulse width 0.1-20ms Pulse frequency 0-20H Z Machine power 5 / 20KW Control system Single chip machine/ PLC Supervising work table Red light indication, microscope, CCD camera and monitor (optional)