Why is the round hole cut by the laser cutting machine not round?
The traditional method of sheet metal punching is to use punching machine to punch, which relies on external hard force directly acting on the surface of the workpiece, which is easy to cause disadvantages such as low precision and many edge stabbing. However, the emergence of laser cutting technology has changed the current disadvantage situation. More and more processing enterprises begin to choose laser to cut round holes. The processing section is smooth, and the diameter size can be changed at any time. The operation flexibility is high. However, with modern processing methods, a skilled operator is also needed. Improper operation will cause irregular circles. Xiao Bian and everyone sorted out the possible problems.1. It may be that the light intensity is not adjusted well, resulting in no coincidence at the end of the end. 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 be skipped, and the result will not coincide.
2. Then look at the hardware: whether there is any problem with the beam, lens, nozzle, etc.
3. Check whether the servo motor or the cutting head is fixed loosely.
4. Blowing air pressure is not suitable
In the process of blowing, when the air pressure is too small, there will be edge scraping and carbonization, and the pressure is too large and easy to burst. Therefore, this requires the process proofing engineer and the machine to cooperate perfectly, and choose the appropriate air pressure with experience, so as to make the cut round holes fuller.
5. The round hole is too small
The best solution for laser cutting machine to cut round holes is the round hole ratio of 1:1, that is to say, the ratio of aperture to plate thickness is 1:1. Of course, this ratio, that is to say, the larger the aperture, the easier it is to cut high-quality round holes. Otherwise, when the energy of the fiber laser cutting machine is insufficient, the cutting hole is easy to have a breakpoint residue and the round hole is not round.
6. Servo motor parameters are wrong
Round holes sometimes appear elliptical or irregular phenomenon, which is related to the mismatch of XY axis motion, and the direct cause of the mismatch of XY axis motion is the improper adjustment of servo motor parameters. Therefore, the quality of cutting round holes also has certain requirements for servo motors.
7. Guide and lead screw accuracy error
If the servo motor parameter error affects the cutting quality, then the guide rail and screw accuracy error will directly lead to the hole accuracy is not up to expectations. This is related to the strength of the laser cutting machine manufacturer. Usually, some small factories will deceive customers 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 not be good, affecting the added value of the product. So choose high quality and choose big brand laser cutting machine is very necessary.
All these parameters are used to identify whether the accuracy, speed and other parameters of cutting round holes meet the requirements of the standard, and are sufficient to identify whether the quality of the purchased laser cutting machine is passed. So in the process of buying laser cutting machine must keep your eyes open.
Four factors affecting the cutting accuracy of fiber laser cutting machine
The size of the laser condensation of the laser generator: if the spot is small after gathering, the cutting accuracy is higher, and the gap after cutting is also smaller. It shows that the fiber laser cutting machine has high precision and good quality. However, the beam emitted by the laser is tapered, so the cut gap is also tapered. Under this condition, the greater the thickness of the workpiece, the lower the accuracy, so the larger the slit.
If the accuracy of the worktable of the fiber laser cutting machine is very high, the accuracy of the cutting will be increased. Therefore, the accuracy of the workbench is also an important factor in measuring the accuracy of the laser generator.
The laser beam condenses into a cone: When the fiber laser cutting machine is cutting, the laser beam is tapered downward. At this time, if the thickness of the cutting workpiece is large, the cutting accuracy will decrease, and the cut gap will be larger.
The cutting materials are different: it will also affect the accuracy of the fiber laser cutting machine. In the same case, the fiber laser cutting machine cutting stainless steel and cutting aluminum its accuracy will be different, the cutting accuracy of stainless steel will be higher, and the cutting surface will be smooth.