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Cutting accuracy of laser cutting machine
The laser cutting machine has the advantages of high cutting accuracy, fast speed, no limitation of cutting pattern, low processing cost, etc., and it is gradually replacing traditional metal cutting process equipment. At present, the application range of laser cutting machines is becoming wider and wider, and the cutting accuracy of laser cutting machines is related to the processing technology, so it is also one of the most concerned issues for buyers. For the understanding of laser cutting accuracy, many people have certain misunderstandings. In fact, the cutting accuracy of a laser cutting machine does not entirely depend on the equipment itself, but is affected by many factors. Below, we will briefly understand which factors are most likely to affect the cutting accuracy of the laser cutting machine.
a. The spot size after the laser beam passes through the focus. The smaller the spot after the laser beam is concentrated, the higher the cutting accuracy.
b. The positioning accuracy of the worktable determines the repeatability of the cutting. The higher the accuracy of the table, the higher the cutting accuracy.
c. The greater the thickness of the workpiece, the lower the accuracy and the greater the slit. Since the laser beam is tapered, the slit is also tapered. It is also stainless steel. The slit of 0.3mm stainless steel is much smaller than that of 2mm stainless steel.
d. The material of the workpiece has a certain influence on the accuracy of laser cutting. In the same situation, stainless steel has higher cutting accuracy than aluminum, and the cut surface is smoother.
Laser cutting machine cutting speed and cutting effect
Laser cutting has no burrs, wrinkles and high precision. For many electromechanical manufacturing industries, because modern CNC laser cutting systems controlled by computer programs can easily cut workpieces of different shapes and sizes, it is often preferred to punching and molding processes; although the processing speed of laser cutting machines is still slow It is better for die punching, but it has no mold consumption, no need to repair molds, and saves time for mold replacement, thereby saving processing costs and reducing production costs, so it is more cost-effective to consider overall. In the metal processing industry where the industrial manufacturing system accounts for a heavy share, many metal materials can be cut without deformation regardless of their hardness. However, for high-reflectivity materials, such as gold, silver, copper, and aluminum alloys, because they are also good heat transfer conductors, laser cutting is difficult or even impossible.
a. A moderate increase in the cutting speed can improve the quality of the cut, that is, the cut is slightly narrower, the cut surface is flatter, and the deformation can be reduced.
b. The cutting speed is too fast so that the cutting line energy is lower than the required value, and the jet in the slit can not quickly blow off the molten cutting melt immediately, resulting in a large amount of back drag. The surface quality of the incision decreases due to the dregs on the incision.
c. When the cutting speed is too low, because the cutting site is the anode of the plasma arc, in order to maintain the stability of the arc itself, the anode spot or anode area must be found near the cut seam closest to the arc to conduct current. At the same time, more heat will be transferred to the radial direction of the jet, so that the incision will be widened. The molten material on both sides of the incision will gather and solidify at the bottom edge, forming a slag that is not easy to clean, and the top edge of the incision will be heated and melted too much. Form rounded corners.
d. When the speed is extremely low, the arc may even go out due to the wide cut. This shows that good cutting quality and cutting speed are inseparable.
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