green laser pointer is utilized to indicate the direction

green laser pointer is utilized to indicate the direction. 
The workshop has made the special design for logo of green laser pointer
At present, Germany's Volkswagen in the Audi A6, Audi A4, Golf and Passat and other roof using this technology, the BMW 5 Series, Opel Vectra models, and the Swedish Volvo models of production, the

laser welding is the rush. In China, Shanghai Volkswagen has been used in many models of laser technology to weld the roof and side wall of the outer plate, such as the Passat, Touran, etc.;

Shanghai GM new Regal, LaCrosse platform, the application of laser welding process. Figure 1 is the new Regal Shanghai GM's roof and side wall of the welding device used in the of 4kW pump laser,

weld identification, tracking systems and real-time monitoring of weld quality systems are all integrated in the laser welding head. In the daylight, the laser beam of this kind of green laser

pointer can be seen more clearly.
Welding the new Regal roof just ten seconds, compared with the traditional spot welding, welding quality and efficiency are greatly improved after welding. Without increasing the roof trim,

improved vehicle aesthetics. Compared with the traditional resistance spot welding joints using laser welding can significantly reduce joint groove width reduced to about 10mm (from 20mm), which

can reduce vehicle weight. Design connection, can be overlapped (overlap joint) and lap (fillet joint) two kinds. It can be seen from Figure 2, both the welding position differences. The

overlapping lower requirement on the positioning of the laser focus, just focus can be in the plates overlap the range, do not need to specialized seam tracking system. It is compared with green

laser pointer whose power is very low. 
Electron beam and laser processing with a high energy density beam processing technology, the application of the field much the same energy density in the same paragraph of magnitude much higher

than other sources of heat. The same time, they are also extremely similar to the principle of the material. The electron beam welding and laser welding, principles of e-beam welding (electron beam

machining, EBM) under vacuum conditions, the electrons produced by the electron gun, acceleration, focusing the energy density of 106 ~ 109W/cm2 fine beam, high-speed (speed of light, 60% to 70%)

impact to the workpiece surface, and within a very short time, most of the electron kinetic energy is converted to heat, forming "hole" effect.