Get high pulse peak power (108W), applicable to the laser processing applications requiring high peak power; another big advantage is that through the optical fiber transmission, avoiding the complex transmission design of the optical path in three-dimensional processing is very useful. In addition, technology by the third harmonic of the laser wavelength is converted to 355nm (UV) laser three-dimensional shape technology. 2) of CO2 laser CO2 laser laser material for CO2 gas mixture, its main applications of the laser wavelength of 10.6 μ m. Due to higher laser conversion efficiency of the laser, the heat generated by the laser work by convection or diffusion rapid transfer to the outside of the laser gain region, laser average output power can be done to a very high level (10 000 watts or more) to meet high-power laser processing requirements. The standard working voltage of this kind of battery of green laser pointer is 3.0V.
Domestic and foreign high-power CO2 lasers used for laser processing, mainly cross-flow, axial flow lasers. Cross-flow lasers: the cross-flow laser beam quality is not good for multi-mode output, mainly for heat treatment and welding. China has been able to produce a variety of high-power transverse flow CO2 laser line can meet the needs of the domestic laser heat treatment and welding. Axial flow lasers: Axial laser beam quality is better, for the fundamental mode or quasi-mode output, mainly for laser cutting and welding, laser cutting equipment in China market is mainly occupied by foreign axial flow laser. The stop voltage of this kind of battery of laser pointer is 2.0V.
Although the domestic laser manufacturers in foreign countries on the axial-flow lasers do a lot of work, but needs to import the main parts, the price is difficult to a significant decline, the penetration rate is low. Wuhan the bleomycin Technology Development Co., Ltd. has developed a cyclone CO2 laser, shown in Figure 1, a new type of rotating gas flow pattern, swirl CO2 laser with axial flow CO2 laser beam quality and cross-flow CO2 laser cost low, small advantages. Promote the application of the industrial processing lasers, the development and popularity of laser processing industry in China will play a positive role in promoting. Mold laser manufacturing. Laser indirectly into a three-dimensional light form of molding 1 (Stereo Lithography Apparatus, referred to as SLAs). The rated capacity of this kind of battery of green laser is 1400mAh.
The process is the use of ultraviolet laser beam layer by layer scanning method of light curing adhesive to form a three-dimensional solid workpiece. In 1986, 3D Systems, Inc. introduced a commercialization prototype SLAs-1. SLA process of the highest precision can reach 0.05mm. The ② thin-layer laminated manufacturing (Laminated Object Manufacturing, referred to as LOM) technology thin-film materials such as paper, plastic film, developed in 1986 by the American company Helisys success. By repeated CO2 laser cutting and material paste, layered manufacturing entity workpiece. The LOM process is suitable for the manufacture of large parts, its accuracy of 0.1mm. ③ Selective Laser Sintering (Selective Laser Sintering or SLS) process is the use of powder-like material forming. 1400mAh is the working current of the battery of usa green laser pointer to some extent.
Successfully developed in 1989 by the American University of Texas at Austin, scan high-intensity CO2 laser layer sintering materials, powders and the formation of three-dimensional workpiece, the biggest advantages of the SLS process is more extensive selection. Of the three laser rapid prototyping technology at home and abroad have been more widely used due to the development of a long time, the technology is relatively mature. Three-dimensional workpiece formed by the above method can not be directly used as a mold, the need for subsequent processing, so called laser indirectly into the molding. The main approach: rapid prototyping of the workpiece handling used as a mold. LOM production of paper mold surface treatment instead of sand casting wood mold. The capacity of green laser pointer can determine the life time of the battery.
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