Fiber laser cutting machines six common problem solutions

 

Any kind of cleavage technique, except for a few conditions that can start from the edge of the board, usually requires a small hole in the board. Previously, in the laser stamping laminating machine, a punch used to punch out a hole. And then the laser used to cut from the opening of the small hole. Fiber laser cutting machine six common problem solutions.

Thus, there are two ways of perforating a fiber laser cutting machine without stamping equipment. Then fiber laser cutting machine six common problem solutions.

[Pulse Perforation]

High-power pulsed laser used to melt or vaporize a small number of materials. Air or nitrogen often used as an auxiliary gas to reduce the expansion of pores due to exothermic oxidation. And the oxygen pressure is lower when the gas pressure is cut. Only a small particle eruption occurs in each pulsed laser, which gradually deepens, so that the slab perforation requires several seconds. Once the perforation complete, the standing line replaces the auxiliary gas with oxygen for cutting.

Thus, the perforation diameter is small, and the perforation quality is superior to the explosion perforation. To this end, the laser used should not only have higher output power. But more importantly, the time and space characteristics of the beam. In addition, a more reliable pneumatic control system need to complete the gas species, gas pressure switching and perforation. The manipulation of time. Fiber laser cutting machine six common problem solutions.

[Explosive perforation]

The material forms a pit in the middle after the laser irradiate, and then the molten material quickly remove by the oxygen flow coaxial with the laser beam to form a hole. Generally, the size of the hole relate to the thickness of the plate. The uniform diameter of the explosion perforation is half of the thickness of the plate. Therefore, the hole diameter of the thick plate is large and not round, and it is not suitable for use on parts with high processing precision. On the waste. In addition, since the oxygen pressure used for the perforation is the same as that during the cutting, the splash is large. Fiber laser cutting machine six common problem solutions.

2. Glitching of the workpiece when laser machining stainless steel and aluminum-zinc plate

In this case, the first thing to think about is that the burr cut when the stainless steel cut. And the cutting speed cannot simply accelerate, because the speed of the addition sometimes occurs when the sheet not open. Especially when processing the galvanized steel sheet. The phenomenon is particularly prominent. At this time, you should consider other elements of the fiber laser cutting machine to solve, such as whether the nozzle is to be replaced, the rail movement is unstable.

3. Analysis of the deformation of small holes during cutting

This is because the machine tool does not adopt the method of exploding perforation during processing, but the method of pulse perforation is adopted, so that the laser energy is too concentrated in a small area, and the non-processed area is also burnt, which causes the deformation of the hole, which affects Processing quality. At this time, the pulse perforation method should change to the explosion perforation method during the processing. For the smaller power fiber laser cutting machine, the opposite is true. In the small hole processing, the pulse perforation method should be adopted to obtain a better surface finish.

4. A solution to the problem of processing low carbon steel with abnormal sparks

This condition can affect the quality of the cut and the finish of the part. At this moment, if other parameters are normal, the following questions should be considered:

1. Loss of the laser head nozzle? The nozzle should replace in time. In the absence of new nozzle replacement, the operating gas pressure should increase;

2. The thread at the junction between the nozzle and the laser head is loose? At this point, the cut should immediately suspend to see the laser head connection condition, and the thread is good from the head.

Catherine

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