Laser cutting machine widely to the construction industry structure

Laser cutting machine widely to the construction industry, research, conducted in Germany, Spain and Japan, said can also use the laser in granite and other stone engraved on the surface or shallow weak in the craters track. Beam material and technical analysis is a kind of technology progress, using pulse laser beam scanning along the stone surface, gives its sliding resistance is perfect, and don't know drop less luster. This step is in some factories in Italy and Germany, prevent slippery stone material production. For the existing ground of antiskid processing can be removed laser prototype is victory. Laser decontamination: more countries are based on the analysis of using lasers to remove surface of concrete walls and the feasibility of the implement of nuclear pollution on the ground layer. Usually, pollution being near the surface, only the following concrete is no pollution. Remove the pollution of surface layer ( Usually a few MM thick) , will greatly reduce the nuclear facilities scrapped to solve concrete volume. Laser decontamination advantage is: easy to carry out the remote control, that the workers in the work time to the short of pollution area, reduce the secondary pollution of waste, pollution reduced equipment. Selection of several laser removal of surface technology are: evaporation, spallation and thermal degradation. Laser glazing: natural stone material and products to carry out the laser glazing technology, is progress in the early 1990 s, after the glazed products are important for panel. With low power density ( About 400 W/cm2) Defocusing beam melting of surface layer and the color can add the metal ions through the steps to add to the layer. Under the condition of natural stone material, can be in before the laser is resolved, or in other steps will brine with the brush coating of metal ions on the surface of the product. In a cement products condition, can be in before casting, add a small amount of metal oxide powder into the mortar or concrete. When the surface by laser melting glass layer is covered with a layer of metal ions, or oxide color. The advantage of laser glazing is: design or color depth through improved laser solution parameter adjustment easily. Surface evaporation ( Melting) Available on high power laser beam in the implementation of the concrete surface scan, but at the moment of power density must be high enough, at least in a few kw/cm 2 orders of magnitude, in the order of spallation, simply use the focused laser beam, the power density is low, about 200 - 300 w/cm 2 orders of magnitude. In the latter situation, under the surface of the water in the concrete, the instantaneous evaporation produce internal stress, the stress can result in surface layer and spallation. With cement spallation steps to remove surface defect is: this step is not so stable, can only be used as the first operating methods. With laser scanning has repeatedly spallation area further spallation almost don't know. Therefore, this step only to remove 2 - 3 mm of superficial layer effectively. Remove the surface layer of the third step is to use laser melt near the surface of concrete and thermal degradation. Solidification layer of glass and the thermal degradation of layer below it is very fragile, easily removed by mechanical steps. Laser melting and mechanical removal process can be repeated, until the removal of thickness reach requirements. Surface coarsening: using CO2 laser used in granite surface scratches and coarsening of the building, has been demonstrated in more than ten years ago in Japan, people try to use it as a traditional steps ( Foo coarsening method) Substitute. Compared with the fire-breathing coarsening method, the advantages of laser scratch is: almost don't know the material under the surface of damaged, almost don't know the intensity of interference, destroy the edge of the stone don't know. Rock drilling: punch goal is it to be able to plug into, blasting and remove the overhanging rock. The cause of the laser to make holes in the stone be adopted: in borehole sequence, not entities and noise.
in the field of civil engineering, with the analysis of the laser processing and building materials, has been carried out for the last 40 years, but the development is very slow, cause is: the source of laser processing is too high. The field requirement for laser output power is too high, because, in normal conditions, concrete and other building materials are very thick, great. Since the late 1990 s, a few kilowatt laser ( Such as high power diode laser and fiber laser, etc. ) Huge development, and the new in the field of civil engineering ignited the enthusiasm of the analysis of laser processing and building materials. Below, we will briefly stated in laser processing and development of new building materials, such as concrete, plaster board and natural, drilling, and laser surface solution.