Influence of carbon dioxide (
The five elements of laser cutting quality
As the saying goes, is the heart of the laser equipment, laser cutting quality plays a decisive role.
A good laser, should have the ideal model, the stability of the power and other factors.
Many different kinds of laser, from different angles can have different definitions for it.
Medium to distinguish from the incentives, can be roughly divided into solid state laser and gas laser, respectively in different solid or gas as medium, such as ruby earlier laser is used as the medium.
Currently used in the mainstream of laser cutting laser as the carbon dioxide laser, followed by YAG laser.
YAG laser has a photoelectric conversion efficiency is high, the characteristics of small volume, but the pump sources are used because of its energy consumption is fast, high maintenance cost factors make its application is limited by a lot.
With carbon dioxide laser, are more likely to become the ideal model of laser and a high energy, together with stable performance, short downtime, which is widely used in all kinds of material cutting.
A:, carbon dioxide laser is used electrodes incentive mode generated by laser, carbon dioxide gas according to the installation of the metal electrode position can be divided into dc and rf incentives.
2: laser, laser output pulse output frequency and continuous output, used for cutting and welding laser mainly adopts pulse output mode, the main influence of cutting speed and pulse frequency incision roughness, to obtain high speed cutting, high frequency is necessary.
At present most manufacturer produces carbon dioxide laser frequency within the 5000 hz.
Three: the beam divergence Angle, from the perspective of strictly speaking, no part of laser beam divergence Angle, but because of the laser mode had a great influence on the far field divergence Angle, so we put it here.
Beam divergence Angle on cutting quality is embodied in the width of the incision and the influence of the slope, the smaller the divergence Angle of the narrower the width of incision, the smaller the slope, so the higher the quality.
Four: the laser mode, is one of the important indicators to measure the laser quality.
Can be divided into single mode, the mode and multimode.
Fundamental mode both TEM -
00 mode, it in the X and Y axis on the index is 0, so it is an ideal dot.
The TEM -
00 model of laser beam diameter can be obtained, because of the small light spot in the cutting process and cutting seam and faster cutting speed.
And multimode in x, y direction are non-zero index, the beam quality is poorer, generally only used in welding and cutting.
5: laser power, including peak power, energy stability factors.
Different power in the cutting of sheet metal can be cut through the thickness of the different, with 4 kw laser as an example, it can cut 20 mm thick carbon steel plate, or 15 mm stainless steel, 10 mm aluminum alloy;
And more than 5 kw laser can cut 25 mm thick carbon steel, stainless steel up to 20 mm.
Power is another indicator of power stability, excellent cutting quality, must be the best incision throughout.
Long-term production of laser is a very important test.
Dc excitation laser caused by electrode ablation, long-term work in the state of power attenuation.
In addition, because of some laser vacuum pump and the turbine pump USES the lubricating oil for lubrication, lead to oil pollution laser resonant cavity, and shorten the working life of the laser.