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Views: 18 Author: heyu Publish Time: 06-01-2020 Origin: Leapion fiber laser cutting machine
In the heavy metal processing industry, many metal materials, regardless of their hardness, can be cut without deformation. Of course, for high reflectivity materials, such as gold, silver, copper and aluminum alloy, they are also good heat transfer conductors, so laser cutting is very difficult or even impossible. From the point of view of laser cutting machine itself, too fast speed will increase the wear of belt and synchronous wheel. The speed of laser cutting machine changes with the following factors: beam power, beam mode, spot size, material density, energy required to start gasification and material thickness.
In the process of laser cutting, the most perfect solution can only be obtained by combining the structure design of the cutting machine and the accuracy requirements of the cutting materials. During steel cutting, oxygen is used as the auxiliary material to generate exothermic chemical reaction oxidation between steam and molten metal, and at the same time, it helps blow away the slag in the slit. For cutting polypropylene, compressed air is used, and inert gas is used for cutting cotton, paper and other flammable materials. The auxiliary vapor entering the nozzle can also cool the focus lens, prevent smoke from entering the lens base to pollute the lens and cause the lens to overheat.
Laser cutting has no burr, wrinkle and high precision, which is superior to plasma cutting. When the cutting speed of fiber laser cutting machine is too fast, the end time of laser beam and the material to be cut is too short. From the cutting effect, the cutting energy is not enough, resulting in the phenomenon that the cutting material cannot be cut. For many mechanical and electrical manufacturing industries, because the modern laser cutting system controlled by computer program can cut different shapes and sizes of workpieces conveniently, it is often preferred over punching and die pressing processes; Although the processing speed of laser cutting is slower than die punching, it has no die consumption, no need to repair the die, and it also saves the time to replace the die, thus saving the processing cost and reducing the production cost, so it is more cost-effective on the whole. When the cutting speed of the laser cutting machine is too slow, the cutting energy per unit area is too strong, and the interaction time between the material and the laser increases, the burning and burning will occur.
Laser cutting 5mm carbon steel
When the cutting speed is too low, because the cutting place is the anode of the plasma arc, in order to maintain the stability of the arc itself, the anode spot or anode area must find the conductive current place near the cutting seam closest to the arc, and at the same time, it will transfer more heat to the radial direction of the jet, so that the incision is widened, and the melted materials on both sides of the incision gather and solidify at the bottom edge, forming the hard to clean Slag is hung, and the upper edge of the incision is rounded due to excessive heating and melting.
The quality of the incision can be improved by increasing the cutting speed moderately, that is to say, the incision becomes narrower slightly, the surface of the incision is smoother, and the deformation can be reduced at the same time. When the speed is very low, the arc will even go out because the incision is too wide. Thus, good cutting quality and cutting speed are inseparable. The cutting speed is too fast to make the cutting linear energy lower than the required value. The jet in the cutting seam can not blow off the molten cutting melt immediately and form a large amount of drag. Along with the slag hanging on the incision, the surface quality of the incision decreases.
In fact, the selection of cutting speed of fiber laser cutting machine is also very important. The best cutting speed range can be selected according to the equipment instructions or determined by tests. Due to the thickness of materials, different materials, melting point, thermal conductivity and surface tension after melting, the cutting speed also changes accordingly.
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