The adjustment of the influence factors of cutting quality of the laser cutting machine

The influence factors of cutting quality of the laser cutting machine - — Focus position adjustment, due to the laser power density had a great influence on cutting speed, the lens focal length selection is also an important problem. After focusing the laser beam spot size and lens JiaoChangCheng proportional to the beam by the short focal length lens focus after the spot size is small, focus of power density is very high, the cutting material is very good; But its drawback is short depth of focus adjustment allowance is small, generally applies to high-speed cutting thin materials. Because of the long focal length lens has the relatively wide depth of focus, as long as have the enough power density is sufficient to suitable for cutting thick workpiece. When focus in a better position when the kerf width is small, high efficiency, optical fiber laser cutting equipment cutting speed can obtain good cutting result. In determining which coke after long lens focus and relative position to ensure the quality of cutting on the surface of the workpiece is particularly important. Due to their high power density in focus, in most cases, the focus position just in cutting the workpiece surface or slightly below the surface. So in the whole cutting process to ensure focus and workpiece position relatively constant is important condition to obtain the stable cutting quality. Sometimes lenses work because of poor cooling and heat causing focal length change, this needs us timely adjust the focus location. Most cases of application of beam focus should be adjusted to just under the nozzle, optical fiber laser cutting machine nozzle and workpiece surface spacing of 1. About 5 mm.