What are the causes of burrs in laser-cutting?

The burr refers to irregular metal parts such as sharp corners and burrs that appear at the transition of the surface of the workpiece during laser cutting. The burr is one of the common phenomena in the processing of laser cutting machines, and it is also the two major problems that have not been solved so far in the research of metal cutting theory, “the generation and control of burrs”. The burr directly affects the dimensional accuracy, shape accuracy and surface roughness of the workpiece being machined. First, the laser cutting machine processing sheet metal burr causes: The main reason for the occurrence of burrs in the processing of sheet metal by laser cutting machine: When the laser cutting machine is processing the workpiece, the high energy generated by the laser beam illuminating the surface of the workpiece causes the surface of the workpiece to rapidly vaporize and evaporate to achieve the purpose of cutting. Titanium Machinery is the main product of the company with rotary top, screw, shaft machining, CNC lathe machining, shank shank and collet post. However, there is a core device that we must pay attention to, that is, auxiliary gas. The auxiliary gas is the slag that blows off the surface of the workpiece after the surface of the workpiece is vaporized. If the auxiliary gas is not used, the slag is cooled and a burr is formed on the cutting surface. This is the main reason for the formation of burrs. Another reason is the quality of the equipment itself, as well as the parameter setting factors. When the customer purchases the laser cutting machine, the professional operator must debug the equipment. Laser cutting machine processing sheet metal burr solution: 1. Be sure to equip the air compressor with auxiliary gas for cutting. The purity of the gas is high, and it can be exchanged for a gas supplier with better quality. The purity of the gas is very important. It is best not to use the cylinder gas, because after two fillings, the purity is not good and the gas is wasted. For example, laser cutting stainless steel, recommended auxiliary gas using nitrogen, nitrogen is a flame retardant gas, nitrogen processing not only prevents the laser cutting explosion point phenomenon, but also the heated end face will not be instantly oxidized, the cut end face will be more smooth and bright. The auxiliary gas should be adjusted to a pressure of 12-15 kg. The nitrogen under this pressure will not completely stop the combustion, and the waste can be quickly blown away to remove the burr. 2. Find a professional operator to debug the parameters of the metal laser cutting machine until the normal operation, the metal laser cutting machine can be successfully cut. Some parameters of the laser cutting machine will also affect the appearance of slag, which will lead to the burr of the metal laser cutting machine. Therefore, it is necessary to adjust the cutting parameters to the best, and the cutting speed of the pneumatic flow focal length. Adjustment, the parameters provided by the machine can not cut the beautiful workpiece. The laser cutting machine is a sophisticated machine. The operation is also a fine work. Often a data error will cause its work to be abnormal. Therefore, it must be strict and precise in the work to reduce and avoid errors. Equipment + gas + parameters, adjusted to the best, the workpiece is cut without burrs, making the laser cutting machine cut more quality. The burrs are only produced in metal cutting, and there is no burr problem in non-metal cutting. How is the burr generated? In fact, burrs are excessive residue particles on the surface of metal materials. If a piece of material has a burr, then the material can be qualitatively defective, and the more burrs, the lower the quality naturally. Second, according to the working principle of the laser cutting machine, the reasons and solutions for the burr are analyzed. 1. The upper and lower positions of the focus of the beam appear to be deviated. Solution: Adjust the position of the focus and adjust it according to the offset position it produces. 2. The output power of the machine is not enough. Solution: Check if the laser cutting machine is working properly. If it is not normal, it needs timely repair and maintenance. If it is normal, check if the output value is correct. 3. The cutting speed of the cutting machine is too slow. Solution: Adjust and increase the wire cutting speed in time. 4. The purity of the auxiliary gas of the cutting machine is not enough. Solution: Explain the increase in the purity of the auxiliary gas. 5. The addition of the laser beam of the cutting machine is offset. Solution: Debug the focus and make adjustments in time. 6. The instability of the laser cutting machine is too long. Solution: Turn off the machine and let the machine rest. The metal laser cutting machine is a sophisticated machine. The operation is also a fine work. Usually, a data error will cause its work to run abnormally. Therefore, it must be strict and precise in the work to reduce and avoid errors.