How to improve the machining accuracy of laser cutting machines

Xintian Laser - Laser Cutting Machine

The accuracy of laser cutting machines often affects the quality of cutting. The products cut by laser cutting machines with deviation in accuracy are unqualified and waste manpower and resources. When using a laser cutting machine, we need to consider how to improve the accuracy of the laser cutting machine.

How to improve the accuracy of laser cutting machines? Let's first understand several important factors that affect the accuracy of laser cutting processing, and the so-called "tailored medicine" can achieve a complete victory.

The size of the focused spot of the laser beam: The smaller the spot after the laser beam is concentrated, the higher the accuracy of laser cutting processing, especially the smaller the cutting seam. The minimum spot can reach 0.01mm.

The positioning accuracy of the workbench determines the repetitive accuracy of laser cutting processing. The higher the accuracy of the workbench, the higher the cutting accuracy.

The thicker the workpiece, the lower the accuracy, and the larger the cutting seam. Due to the tapered nature of the laser beam and the tapered nature of the slit, materials with a thickness of 0.3mm are much smaller than slits with a thickness of 2MM.

The material of the workpiece has a certain impact on the accuracy of laser cutting. In the same situation, the cutting accuracy of different materials also varies slightly. Even for the same material, if the composition of the material is different, the cutting accuracy will also vary.

So, how can high precision be achieved during laser cutting processing?

One is the focus position control technology. The smaller the focal depth of the focusing lens, the smaller the diameter of the focal spot. Therefore, controlling the position of the focal point relative to the surface of the material being cut is crucial.

The second is cutting and piercing technology. Any thermal cutting technology, except for a few cases where it can start from the edge of the board, generally requires a small hole to be drilled on the board. In the early days of laser stamping composite machines, a punch was used to punch a hole first, and then the laser was used to start cutting from the small hole.

The third is mouth design and airflow control technology. When laser cutting steel, oxygen and focused laser beams are directed through nozzles to the material being cut, forming an airflow beam. The basic requirements for air flow are that the air flow into the notch should be large and the speed should be high, so that enough oxidation can make the notch material fully perform Exothermic reaction; At the same time, there is sufficient momentum to eject the molten material. Laser cutting has no burrs, wrinkles, and high accuracy, which is superior to plasma cutting. For many electromechanical manufacturing industries, due to the modern laser cutting system with microcomputer programs being able to conveniently cut workpieces of different shapes and sizes (workpiece drawings can also be modified), it is often preferred over punching and molding processes; Although its processing speed is slower than that of die punching, it does not consume molds, does not require mold repair, and also saves time for mold replacement, thereby saving processing costs and reducing product costs. Therefore, overall, it is more cost-effective. This is also the reason why it is popular.