It is the technology problem tackling of green laser pointer

In the continuous welding can be divided into the heat conduction welding and deep penetration welding. With the improvement of the laser output power, especially the high-power CO2 lasers, laser deep penetration at home and abroad, has been developing rapidly, the largest welding aspect ratio has reached 12:1, laser welding material by the general development of low carbon steel galvanized plate, aluminum, titanium, copper and ceramic materials, laser welding speed has reached every minute tens of meters. Laser welding technology has become more sophisticated, and a large number of applications to the production line welding in the automotive production line, such as gear, the car floor and the structure (including the door body), high-speed Tailored Blanks has made great economic and social benefits. The laser technology is the technical core of  green laser pointer .
This process is extremely complex, the micro is a quantum process, the macro is manifested in the reflection, absorption, melting, vaporization, and other phenomena. Laser welding can be achieved using continuous or pulsed laser beam, the principle of laser welding can be divided into the heat conduction welding and laser deep penetration welding. 104-105 W/cm2 power density is less than the heat conduction welding, the melt depth and welding speed is slow; 105-107 W/cm2 power density is greater than when the metal surface to heat the role of concave into a "hole" to form a deep penetration , welding speed, aspect ratio features. Will appear in the laser and the workpiece role in the process of self-oscillation effect, holes in their bath, bath, the metal flow phenomenon of cyclical changes. Some other questions of  green laser pointer  can be put forward.
Because they never solidly built car. Supplement to mention many of us buy a car before always like to look at the comparison of the models, technical parameters, when you see the parameters of the Japanese car really want to make a folded slightly. The relevant U.S. authorities investigated a Japanese car of engine power and found that the nominal value of the engine data is generally high, with the facts, this is what causes it? For two reasons: the extensive use of the imperial horsepower as the standard with the world, the Japanese adopted the metric horsepower, which makes the horsepower value is too large; Japanese test engine power only to test the value of the net power, while the European and American car makers, including German The test power is to test the value of its useful power. It is the technology problem tackling of  green laser pointer .