Batch sales of green laser pointer are popular

Another attractive laser processing of applications is to use a laser to achieve the characteristics of the local small-scale heating, laser possess such characteristics make it ideal for printed circuit board of a class of electronic devices of welding, the laser can in the electronic device to generate a very small area, the average high temperature, while the joints are not affected in areas outside. The principle and process of laser welding, laser welding principles. Laser beam output by different ways, can be laser welded into a continuous pulsed laser welding and laser welding. The raw material of china laser pointer should be tested.
If the laser welding seam formation characteristics, and can be laser welded into the thermal conductivity and deep penetration welding. The former use of the laser power is low, the formation of long bath, and melt depth, used for welding of small parts; which uses the laser power density, laser radiation zone metal melting fast, while in the molten metal with a strong vaporization able to obtain greater penetration weld, the weld depth and width is relatively large, up to 12:1. Figure 3-4 shows the evolution of the melting process. Laser welding, laser beam through the material "into the" heat (laser spot diameter less than l mm), heating the material very quickly, over the depths below the surface of the material in a very short period of time to reach a high temperature. It is very important for the china laser pointer company to choose a good subcontractor.
Weldment penetration depth of laser power density can be controlled. Penetration depth of the laser power density can be controlled. Experience has shown that a reasonable focused laser beam of 1 kW, to lm / min welding speed steel can be weld penetration depth of 1.5 mm. Laser welding heat input was significantly lower than arc welding and gas welding, you can get near-vertical deep and narrow weld and heat affected zone is narrow, small deformation weldment. Welding of steel, when the power density of l04W/mm2 when the welding speed can reach tens of meters per minute. As the power density can be achieved is a multi-layer thin plate welding. The smaller the diameter of the laser beam can be accurately aligned on the spot weldment. The process engineer has submitted the suggestion of the workers about the technical problems of china laser pointer to Chief Engineer.
As the laser welding of the welded joints without severe stress concentration, showing good anti-fatigue properties and high tensile strength. The use of laser power density is less than 105W/cm2 spot, the laser metal surface heated to melting and boiling points between. Welding, the metal surface will be absorbed laser energy into heat energy, the metal surface temperature and melting, and heat conduction through the heat transfer to the metal inside the melt zone is gradually expanded to form solder or weld solidification , the penetration depth is approximately hemispherical outline, this mechanism is called welding heat welding. Its characteristics are: laser beam power density, a large part of the light reflected by the metal surface, the light absorption rate is low, the depth of weld, the welding speed slow. Mainly used for thin (thickness <1 mm), small parts of the welding process. The customer has the stricter requirements for quality ofchina laser pointer.
When the laser spot on the power density is large enough (> 106W/cm2), the metal in the laser irradiation is rapidly heated, its surface temperature in a very short period of time raised to the boiling point, melting or vaporization of the metal, resulting in metal steam bath to leave a certain speed, selected on the molten liquid metal vapor produces an additional pressure on the pool down to the metal surface depressions, resulting in a small laser spot next pit. When the beam to the bottom of the hole is heated, the resulting pressure metal vapor on the one hand to the Bottom of the liquid metal to further deepen the pits, on the other hand, flying out to the pit outside the steam bath of molten metal pressed against around This process continues down, then the liquid metal to form an elongated hole. Batch sales of green laser pointer are popular.