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Harbin Institute of Technology laser beam is coherent light beam with a single frequency, the launch does not produce divergent available lens polycondensation the focus of a certain size (0.076 to 0.8 mm in diameter). Small focus of the laser beam can be used for welding, cutting and punching; major focus of the laser beam can be used for surface heat treatment. The laser beam can be used to mirror any changes of direction, thus welding the parts of the general welding methods can not be close to the workpiece. Such as the use of fiber optics to guide the laser beam, the better to increase the flexibility of the welding. Laser sub-solid lasers and gas lasers. The solid-state laser materials used for the ruby, neodymium glass, etc.. Solid-state laser output energy is small, about 1 to 50 joules, pulse laser. It means that 5mw green laser can be used by the stargazer.
Heating pulse duration is very short (less than 10 milliseconds), thus solder joints can be as small as tens to hundreds of microns, and high precision welding, suitable for the welding of the metal foil of less than 0.5 mm thickness, continuous welding or 0.6 mm diameter wire butt welding, solid state lasers are widely used in the welding of miniature, precision, densely arranged on the heat-sensitive electronic components and equipment parts. Gas lasers used in materials for carbon dioxide or argon plasma gas, power (15 to 25,000 watts), to produce a continuous laser, continuous welding, welding of 0.12 to 12 mm thick low-alloy steel, stainless steel, nickel, titanium, aluminum and other metals and their alloys. Low-power CO2 laser welding also non-metallic materials such as quartz, ceramics, glass and plastic. It is about the color of the laser beam light emitted by 5mw green laser.
Laser welding of high quality, sometimes more than the electron beam welding and quality. Laser welder, especially high-power laser welding machine, high cost, and efficiency is very low, usually only 5 to 10%, the best 20%, penetrating power not as the electron beam. With a laser beam in the air or protective gas welding and convenient than the electron beam welding. The main features of laser welding compared with other conventional welding techniques, laser welding of the main advantages are: speed, depth, small deformation. Room temperature or under special conditions, welding, welding equipment device is simple. For example, the laser through the electromagnetic field, the beam will not be offset; laser welding can vacuum, air and a gas environment, and through the glass or transparent material on the beam welding. The laser beam light of cheap Laser Pointers can be seen very clearly.
Welding of refractory materials such as titanium, quartz, and welding the opposite sex material to good effect. Laser focus, high power density welding of high-power devices, the aspect ratios up to 5:1 up to 10:1. Can be micro-welding. Available by focusing a small laser beam spot, and can precise positioning can be applied to the automated production of large quantities of micro, small parts welding. Welding can be difficult to close the site, the implementation of long-distance non-contact welding, and has great flexibility. In recent years, the YAG laser processing technology used in fiber optic transmission technology, access to a wider range of promotion and application of laser welding technology. The laser range of this kind of 5mw green laser can meet the special requirement.
The laser beam is easy to realize the beam splitter according to time and space, at the same time processing of multi-beam and multi-bit processing, provided the conditions for more precise welding. Laser welding, however, there are some limitations: the requirements of the weldment assembly of high precision, and the requirements of the position of the beam on the workpiece can not have a significant offset. This is because the laser focus spot-foot rain-inch weld narrow, the filler metal materials. If the workpiece assembly precision beam positioning accuracy is below standard, it is likely to cause welding defects. Lasers and their associated systems, high cost, one-time investment. Laser welding heat conduction. Laser welding is a high-intensity laser beam radiation to the metal surface through the interaction of laser and metal, the metal melt formed welding. 5mw green laser used for the star gazing can be the green laser pointer.