The quality of fiber laser cutting machine

The quality of fiber laser cutting machine

The quality of fiber laser cutting machine

Cutting accuracy is the first factor in determining the quality of a CNC laser cutting machine.

The four factors that affect the cutting accuracy of CNC laser cutting machine.

Firstly, the size of the laser laser coagulation. After the gathering, if the spot is very small, the cutting accuracy is very high, and if the gap after cutting is also very small. It shows that the precision of the laser cutting machine is very high and the quality is very high. However, the beam is emitting, so the cut-out gap is also tapering. In this condition, the greater the thickness of the work piece, the lower the accuracy, and the larger the slit.

Secondly, the accuracy of the table. If the accuracy of the table is very high, the accuracy of the cutting will also increase. Therefore, the accuracy of the table is also a very important factor in measuring the accuracy of the laser generator.

Thirdly, laser beam condense into a cone. When cutting, the laser beam is downwards. If the thickness of the work piece being cut is very large, will reduce the cutting accuracy , and the cut-out gap will be very large.

Finally, different cutting materials will also affect the accuracy of laser cutting machine. In the same situation, the precision of cutting stainless steel and cutting aluminum will be very different, stainless steel cutting accuracy will be higher, and the cut surface will be smooth.
In general, the following six criteria can measure the quality of laser cutting .
1. Cutting surface roughness Rz
2. Cutting slag size
3. Trimming perpendicularity and slope u
4 cutting edge fillet size r
5. After the stripe drag n
6. Flatness F

Cut perforation

Cutting and perforating technology: Any kind of thermal cutting technology, except for a few cases that can start from the edge of the board, generally must wear a small hole in the board. Early on the laser stamping compounding machine, a hole was punched out first with a punch, and then laser cutting was started from the small hole.

For laser cutting machines without a stamping device there are two basic methods for perforating.

(1) Blast drilling: After the material is irradiated with continuous laser light, a pit is formed in the center, and then the molten material is quickly removed by the oxygen flow coaxial with the laser beam to form a hole.

(2) Pulse drilling: Pulse high-power pulsed laser is used to melt or vaporize a small amount of material, commonly used air or nitrogen as an auxiliary gas, in order to reduce the hole expansion due to exothermic oxidation, the gas pressure is lower than the oxygen pressure when cutting small. Each pulsed laser produces only a small particle spray, which is progressively deeper, so the thick plate piercing time takes several seconds. Once piercing is complete, the auxiliary gas is immediately replaced with oxygen for cutting.

In this way, the diameter of the perforation is smaller and the perforation quality is better than the perforation. The laser used for this purpose should not only have a higher output power; more importantly, the temporal and spatial characteristics of the time beam, so the general cross-flow CO2 laser cannot adapt to the requirements of laser cutting.

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