Laser cutting has the advantages of burr free and high efficiency. Many equipment manufacturers choose to use laser cutting machines to process suitable sheet metal and parts. The processing efficiency and accuracy are better than traditional punching and molding processes. Laser processing has no mold consumption, which not only saves processing costs, but also speeds up the production cycle, and greatly improves the overall processing efficiency. Due to the different types and thickness of processing materials, as well as the influence of many factors, the cutting speed will also have corresponding changes, which will affect the cutting effect.
1. Proper cutting speed can improve the cutting quality, that is, the incision is slightly narrowed, the surface of the incision is smoother, and the deformation can be reduced at the same time.
2. The cutting speed is too fast, which makes the cutting linear energy lower than the required value. The jet in the cutting seam cannot quickly blow off the molten cutting melt immediately, resulting in a large amount of drag. With the slag hanging on the incision, the surface quality of the incision decreases.
3. 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 place of conducting current near the slit nearest to the arc, and at the same time, it will transfer more heat to the radial direction of the jet. Therefore, the incision is widened, and the molten materials on both sides of the incision gather and solidify at the bottom edge, forming slag that is not easy to clean, Moreover, the upper edge of the incision forms a fillet due to excessive heating and melting.
4. When the speed is very low, the arc will even go out because the notch is too wide. It can be seen that good cutting quality and cutting speed are inseparable.