Many companies use laser cutting machines are very concerned: how to use laser cutting machine to produce good quality workpieces? Let us tell you methods of maintaining cutting quality of cutting machine.
The following factors affect the quality of the cut.Like cutting speed, focus position, assist gas, laser output power and workpiece characteristics! Let’s look at the first two reasons.
1. The effect of cutting speed on cutting quality
For a given laser power density and material, the cutting speed is in accordance with an empirical formula.
As long as the cutting speed of the material is proportional to the laser power density, increasing the power density increases the cutting speed.
The power density refer to here is relate not only to the laser output power, but also to the beam quality mode.
In addition, the characteristics of the beam focusing system.
That is the spot size after focusing, also have a large effect on laser cutting.
Especially for metal materials, the laser cutting speed can have a relative adjustment range.
While maintaining other process variables,that maintaining a satisfactory cutting quality.
This adjustment range is slightly thicker than when cutting thin metal width.
Sometimes, the slower cutting speed will also cause the hot melt material to ablate the surface of the mouth.
2. The effect of focus position adjustment on cutting quality
Since the laser power density has a great influence on the cutting speed, the choice of lens focal length is an important issue. However, its shortcoming is that the depth of focus is very short and the adjustment margin is adjusted. Small, generally suitable for high-speed cutting of thin materials. Since the telephoto long lens has a wide focal depth, it is suitable for cutting thick workpieces as long as it has sufficient power density.
Due to the high power density at the focus. In most cases, the focus position at the time of cutting is just at the surface of the workpiece. Ensuring a constant relative position of the focus to the workpiece is an important condition for obtaining a stable cutting quality. Sometimes, the lens causes a change in focal length, which requires timely adjustment of the focus position.
In most applications, the beam focus is adjust just below the nozzle. The distance between the nozzle and the surface of the workpiece is generally about 1.5 mm.
These are methods of maintaining cutting quality of cutting machine.
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