For beginners of laser sheet cutting machine, it will be difficult to encounter poor cutting quality, and they don't know how to adjust many parameters. So today, let's take a look at the problems and solutions encountered!
Under normal circumstances, the parameters that affect the cutting quality are: cutting height, cutting nozzle type, focusing position, cutting power, cutting frequency, cutting duty cycle, cutting air pressure and cutting speed.The hardware conditions are: protective lenses, gas purity, plate quality, aggregators and collimators.
When the cutting quality of the laser sheet cutting machine is poor, we usually recommend a general inspection first.
The main contents and sequence of general inspections are：
1. Confirm the cutting height (it is recommended that the actual cutting height is between 0.8 and 1.2mm).If the actual cutting height is not accurate, then we need to calibrate at this time.
2. Check whether the type and size of the cutting port are used incorrectly.If the situation is correct, we have to check whether the incision is damaged and whether the roundness is normal.
3. For optical center detection, it is recommended to use a cutting port with a diameter of 1.0.The focus of the optical center detection should be between -1 and 1.This makes the light spot small and easy to observe.
4. Check whether the protective lenses are clean, anhydrous, oil-free, and slag-free. Sometimes the protective lenses are fogging due to weather or the air is too cold during pavement installation.
5. Check that the focus setting is correct.If the cutting head is autofocus, you must use the mobile phone APP to check whether the focus is correct.
When we have completed the above five inspections and confirmed that there are no problems, then we will modify the parameters according to the cutting phenomenon of the laser sheet cutting machine.
At this time, how should we adjust the parameters of the laser sheet cutting machine according to this phenomenon? Below we will briefly introduce the state and solutions that stainless steel and carbon steel will encounter when cutting in the laser sheet cutting machine.
For example, there are many types of stainless steel slag.If only the corner slag can be considered, the roundness of the corner can be considered, and the parameters can reduce the focus, increase the air pressure, etc.
If the entire slag is hung, it is necessary to reduce the focus, increase the air pressure, and increase the cutting port, but the focus is too low or the air pressure is too low, which will lead to cross-section stratification and rough surface.If the overall granular soft slag is hung, the cutting speed can be appropriately increased or the cutting power can be reduced.
Laser sheet cutting machine may also encounter when cutting stainless steel: when cutting the slag on the near-end side, you can check whether the gas supply from the gas source is defective and the gas flow rate cannot keep up.
Laser sheet cutting machine generally encounters problems when cutting carbon steel: The thin section is not bright enough, and the thick section is rough.
Generally speaking, the brightness of 1000W laser-cut carbon steel does not exceed 4mm, 2000W is 6mm, and 3000W is 8mm.
The part you want to cut must first be a good board with no rust on the surface and no oxidized paint, followed by a high oxygen purity of at least 99.5% or more. The things to pay attention to in cutting are: Double-layer 1.0 or 1.2 with a small cutting nozzle. The cutting speed needs to exceed 2m/min. The cutting air pressure should not be too large.
If you want the laser sheet cutting machine to cut the thick plate part, the quality is good. First of all, you must ensure that the purity of the plate and gas is closely followed. The larger the aperture selected by the cutting port, the better the cross-section quality, but at the same time the cross-section taper will be greater.