In the study of the interaction acrylic laser engraving of C02 and laser material processing laser and substance, it was found that when the laser power of a few kilowatts to hundreds of kilowatt hours, LSC wave plasma is actually only about 50% of the maximum absorption of the incident laser energy. The reason for this difference is that:
Plasma length / mm rise to a certain height when the plasma, the plasma trailing edge also Figure 2.43 plasmon absorption due to the upward movement from the surface, and when, such as laser power density plasma from the workpiece continues to decay movement, the actual length of the plasma will decrease, which means that when the workpiece from the plasma, the plasma absorption of the laser will vary with the rising height of the plasma increases.
Photoluminescence frontier electron density of plasma ‘of high temperature, the strong absorption of the laser light, while most of the other plasma wood laser engraving machine region of the small electron density, low temperature, low rate of the laser to attract and therefore increases the length of the plasma, the average linear absorption coefficient will be reduced.
co2 laser material having a high reflectivity can cut with a YAG laser
Transmission. On the one hand avoid C02 laser focus during the flight due to co2 laser engraving machine a wide range of optical path changes arising from drift. On the other hand by the robot on the assembly line can be achieved with highly flexible laser cutting Furthermore.
Nd: laser wavelength YAl3 C02 laser is only 1/10 of the same article can be obtained at Chiang smaller than the C02 laser beam spot, and more narrow slit, so that the laser cutting of thin metal sheet to use more, and has a small power peak power pulsed Nd: YAG laser as excitation competing Fan: Finally, as for the copper and other C02 laser light having a high reflectance material you can only use the Nd: YAG light cutting.
In laser cutting system laser emitted from the laser beam output window is transmitted by the transmission system to the rainbow position. Beam delivery systems are generally divided into two categories: Mirror Group and fiber optic transmission oNd: YAG stables can use the mirror group transmission can also be transmitted through the fiber, C02 laser can only use the mirror group Chuan Gan ugly though C02 laser can not use optical fiber transmission, but placed within the articulated arm through the mirror group) may also be carried out with the robot with the flexible manufacturing.
Compared pedicle arm system off a major advantage of the conventional light guide lens group system is co2 laser engraver that it requires only a small adjustment. In addition, because such a system in the light guide through the PSII process remains unchanged and thus can get a constant focus spot, and the instability of conventional mirror group Bringing light guide system in order to eliminate hiding optical path changes resulting from beam focusing characteristics must like complex and expensive auxiliary compensation.
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