In the process of sheet metal fabrication, for punching the most traditional practices are the use of punch presses to do metal stamping, relying on the external hard force directly on the surface of the workpiece, which is likely to result in low precision, edge rows of spikes and other shortcomings. But the emergence of laser cutting technology has changed the current disadvantageous situation, more and more processing companies began to choose the laser to cut round holes, its processing section is smooth, and the size of the diameter can be changed at any time, the operation of a high degree of flexibility, but has a modern processing methods, but also need a driver's skillful operator, improper operation will result in the round also irregular. Small and we sort out the possible problems.
1. may be that the light intensity is not adjusted, resulting in the end of the end does not overlap, generally speaking, the difference between the maximum light intensity and the minimum light intensity should not be more than 5% and do not adjust the speed is too fast, too fast, it may also be jumping frames, the results do not overlap.
2. Then look at the hardware: beam, lens, nozzle and other problems.
3. Check the servo motor, or cutting head fixed is not loose.
4. Blowing air pressure is not suitable
Blowing process, when the air pressure is too small will appear edge scraping, carbonization phenomenon, too much pressure and easy to burst the hole. So this requires a perfect match between the craftsman and the machine, with experience to choose the right air pressure, so that the cut hole is more full.
5. Round hole is too small
Laser cutting machine to cut round holes the best program is the ratio of round holes 1:1, that is, the ratio of hole diameter and plate thickness of 1:1, of course, this ratio, that is to say, the larger the hole diameter, cut out high-quality round holes more easily. Otherwise, when the fiber laser cutting machine energy is insufficient, cutting small holes is easy to point out the breakpoint residue as well as the phenomenon of round holes are not round.
6. Servo motor parameters are wrong
Round holes sometimes appear oval or irregular phenomenon which is related to the XY axis motion mismatch, and lead to XY axis motion mismatch is the direct cause of the servo motor parameters are not adjusted appropriately. Therefore, the quality of cutting round holes also has certain requirements for servo motors.
7. Guide rail and screw precision errors lead to
If the servo motor parameter error affects the cutting quality, then the guide rail and screw precision error will also directly lead to the round hole precision can not meet expectations. This is related to the strength of the laser cutting machine manufacturers, usually, some small factories will lie to customers that the laser cutting machine accuracy can reach 0.1mm, but in fact, in practice, in the process of operation, it will make the laser perforation quality and effect is not good, affecting the added value of the product. So it is very necessary to choose high quality as well as choose a big brand laser cutting machine.
All these parameters are used to identify the precision of cutting round holes, speed and other parameters to meet the standard requirements, are sufficient to identify the purchase of the laser cutting machine quality. So be sure to keep your eyes open during the purchase of a laser cutting machine.
Four major factors affecting the cutting accuracy of fiber laser cutting machine
Laser generator laser cohesion size: after gathering if the spot is smaller, the cutting accuracy is higher, if the gap after cutting is also smaller. This indicates that the fiber laser cutting machine has high precision and good quality. However, the beam from the laser is tapered, so the gap cut out is also tapered. Under this condition, the greater the thickness of the workpiece, the lower the precision will be, so the larger the slit is.
The precision of the worktable: If the precision of the worktable of the fiber laser cutting machine is high, the precision of the cutting is also high. Therefore, the accuracy of the worktable is also an important factor in measuring the accuracy of the laser generator.
Laser beam cohesion into a cone: fiber laser cutting machine cutting, the laser beam is tapered down, then if the thickness of the cut workpiece is larger, the precision of cutting will decline, then cut out the gap will be larger.
Cutting different materials: will also affect the accuracy of the fiber laser cutting machine. In the same case, fiber laser cutting machine cutting stainless steel and cutting aluminum its accuracy will be different, stainless steel cutting accuracy will be higher, and the cutting surface will be smooth.