Laser cutting causes and solutions for burrs

The burr is a common phenomenon in the laser cutting process, which is characterized by various irregular metal parts such as sharp corners and burrs appearing at the transition surface of the workpiece. However, common does not mean that the production of burrs can be accepted, which directly affects the dimensional accuracy, shape and surface roughness of the workpiece, reduces the quality of the product, and brings subsequent inspection, assembly, performance and aesthetics. There are many problems, so you should try to avoid glitch. Is laser cutting a burr necessarily a quality problem with the cutter? When many companies use laser cutting machines for cutting, they find that the workpieces are many burrs and the quality is very unsatisfactory. Therefore, the quality of this cutting machine is suspected to be problematic. Is this really the reason? Actually it is not necessarily. In most cases, the burr is not caused by the quality of the laser cutting machine itself, but by the operator’s wrong operation or the maintenance and maintenance of the cutting machine. In addition, there is another main cause of burrs, which is the auxiliary gas problem. When laser cutting is performed, the laser beam is irradiated onto the surface of the workpiece to generate an extremely high temperature, so that the surface of the workpiece is rapidly vaporized and evaporated, thereby achieving the purpose of cutting the metal. The function of the auxiliary gas is to blow off the residual slag on the surface of the workpiece after the workpiece is vaporized by laser beam irradiation. If this is not done, a burr will form on the cut surface of the workpiece as the slag cools. Below, we will summarize, the reasons for several common burrs, and their corresponding solutions, to help readers away from the trouble of laser cutting burrs. Common causes and solutions for laser cutting to produce burrs: Reason one: The laser cutting machine produces a deviation of the upper and lower positions of the focus of the laser beam, so that the energy does not just converge on the workpiece, the workpiece is not fully vaporized, so that the amount of slag is increased, and it is not easy to blow off, so that burrs are more likely to occur. Solution: Adjust the position of the focus of the laser beam and adjust it to the optimal state according to the offset position generated. Reason 2: The output power of the laser cutting machine is not enough to effectively vaporize the metal, resulting in excessive slag and burrs. Solution: Check whether the laser cutting machine works normally. If it is not normal, it needs to be repaired and maintained in time; if it is normal, check whether the output value is correct. Reason three: The cutting speed of the laser cutting machine is too slow, which destroys the surface quality of the cutting surface and produces burrs. Solution: Adjust and increase the cutting line speed in time to reach the normal value. Reason 4: The purity of the auxiliary gas of the laser cutting machine does not meet the required standard, and the workpiece will be burred. Solution: Replace the higher purity auxiliary gas. Reason 5: The laser cutting machine works for too long, which causes the device to work in an unstable state, which will also cause burrs. Solution: Turn off the laser cutting machine and re-start it after a while to get enough rest. The reasons and solutions for several common burrs in time can only be solved effectively if they understand the root cause of the problem. Readers who want to do machining and sheet metal processing can better grasp the details in processing, improve the quality of products, and jointly promote the progress of China’s manufacturing industry.