What are the potential factors that affect laser cutting machines?—Winnie

There are three kinds of power for the laser cutting machine. It is helpful to know the operation of the laser cutting machine. Let’s take a look at them:

Three areas of laser power (overburned zone, defect free zone, dross zone)

1. Over-burning zone:

When the laser power is too large, the heat input is too large, so that the melting range of the workpiece is larger than the range that can be driven out by the high-pressure airflow, and the molten metal is not blown off by the airflow to generate over-burning.

2. No defect area:

that is, the laser power is in a suitable range, and the cutting effect at this time is good, and it is called a defect-free area.

3. Hanging slag area:

When the laser power is too small, the heat is insufficient, the lower the temperature of the molten product near the lower edge, and the higher the viscosity, so it cannot blow off by the high-pressure airflow and stays at the lower edge of the cutting surface to produce dross. . In severe cases, the incision cannot cut.

Third, the laser cutting machine cutting quality evaluation criteria

The laser cutting of the sheet with a thickness of 2mm or more is not uniform. And the variation in the thickness direction is very different. The change condition has two characteristics:

1. The shape of the cutting surface is divide into two distinct parts. The upper part of the surface is smooth and smooth, the cutting stripe is neat and fine, and the roughness value is small. The lower cutting stripe is disordere, the surface is uneven, and the roughness value is large. The upper part has the direct action of the laser beam, and the lower part has the characteristics of molten metal scouring.

Whether it is continuous laser cutting or pulsed laser cutting, the cutting surface shows upper and lower parts. The difference is pulse laser cutting and the upper cutting strip has a corresponding relationship with the pulse frequency. The higher the frequency, the finer the stripe, the surface The roughness is smaller.

2. The surface roughness in the area of the upper surface of the cut is substantially uniform and does not vary with height.  While the surface roughness of the lower area varies with height, and the closer to the lower edge, the greater the surface roughness.