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Why Is The Circular Hole Cut by the Laser Cutting Machine Not Round?

The traditional method of punching holes in sheet metal is to use a punch, which relies on external hard force to directly act on the surface of the workpiece, which can easily lead to shortcomings such as low accuracy and excessive edge piercing. However, the emergence of laser cutting technology has changed the current disadvantageous situation. More and more processing companies have begun to choose laser to cut round holes. The processing section is smooth, the diameter can be changed at any time, and the operation flexibility is high, but it has modern processing capabilities. The method also requires a skilled operator. Improper operation will cause the circle to be irregular. The possible problems are summarized below.


1. It may be that the light intensity is not adjusted properly, resulting in the final ending not overlapping. Generally speaking, the difference between the maximum light intensity and the minimum light intensity should not exceed 5%, and the speed should not be adjusted too fast. If it is too fast, the frame may skip. , the results do not coincide.


2. Then check the hardware: whether there are any problems with the beam, lens, nozzle, etc.


3. Check whether the servo motor or the cutting head is loose.


4. The air blowing pressure is not suitable.

During the blowing process, when the air pressure is too small, edge scraping and carbonization will occur. If the pressure is too high, holes will easily explode. Therefore, this requires the craft sampler to cooperate perfectly with the machine and choose the appropriate air pressure based on experience, so as to make the cut round holes fuller.


5. The round hole is too small.

The best solution for cutting round holes with a laser cutting machine is a round hole ratio of 1:1, which means that the ratio of aperture to plate thickness is 1:1. Of course, this ratio means that the larger the aperture, the better the cutting of high-quality circles. holes are easier. Otherwise, when the energy of the fiber laser cutting machine is insufficient, the cutting holes are prone to break point residues and round holes that are not round.


6. The servo motor parameters are incorrect.

Round holes sometimes appear elliptical or irregular, which is related to the mismatch of XY-axis motion. The direct cause of the mismatch of XY-axis motion is improper adjustment of servo motor parameters. Therefore, the quality of cutting round holes also has certain requirements for the servo motor.


7. Caused by accuracy errors of guide rails and screws

If the servo motor parameter error affects the cutting quality, then the accuracy error of the guide rail and screw will also directly cause the round hole accuracy to fall short of expectations. This is related to the strength of the laser cutting machine manufacturer. Usually, some small factories will lie to customers and say that the accuracy of the laser cutting machine can reach 0.1mm, but in fact, in the actual operation process, the quality and effect of laser drilling will be poor. Well, it affects the added value of the product. Therefore, it is very necessary to choose high quality and choose a big brand laser cutting machine.

All these parameters are used to identify whether the accuracy, speed and other parameters of cutting circular holes meet the standard requirements, and are sufficient to identify whether the quality of the laser cutting machine purchased is acceptable. So be sure to keep your eyes open when purchasing a laser cutting machine.


Four Factors Affecting the Cutting Accuracy of Fiber Laser Cutting Machines

The size of the laser condensation of the laser generator: if the spot is smaller after condensation, the cutting accuracy will be higher, and if the gap after cutting is also smaller. This shows that the fiber laser cutting machine has high precision and good quality. But the beam emitted by the laser is cone-shaped, so the gap cut out is also cone-shaped. Under this condition, the greater the thickness of the workpiece, the lower the accuracy will be, so the slit will be larger.


Precision of the workbench: If the precision of the fiber laser cutting machine workbench is high, the cutting accuracy will also increase. Therefore, the accuracy of the workbench is also an important factor in measuring the accuracy of the laser generator.


The laser beam is condensed into a cone shape: When the fiber laser cutting machine is cutting, the laser beam is cone-shaped downward. At this time, if the thickness of the cutting workpiece is larger, the cutting accuracy will decrease, and the cut gap will be larger. .


Different cutting materials will also affect the accuracy of the fiber laser cutting machine. Under the same circumstances, the fiber laser cutting machine will have different precision when cutting stainless steel and cutting aluminum. The cutting precision of stainless steel will be higher, and the cut surface will be smoother.



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