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Method to determine the focal position of fiber laser cutting machine

by:VENTECH     2022-03-14
One of the advantages of laser cutting is that the energy density of the beam is high, so the focal spot diameter will be as small as possible in order to produce extremely tiny slits. Because the smaller the focal depth of the focusing lens, the smaller the diameter of the focal spot. For high-quality, high-precision cutting, the effective depth of focus is also related to the lens diameter and the material to be cut, so it is important to control the position of the focus and the surface of the material to be cut. There are three main methods to determine and control the focus position of the fiber laser cutting machine in industrial production:

1. Printing method

First, the cutting head of the united fiber laser cutting machine is to be printed from the top to the bottom of the laser beam on the plastic plate, and the focus is the one with the smaller printing diameter.

2. Inclined plate method

The cutting head of the fiber laser cutting machine should be at the same vertical angle with the diagonally placed plastic plate, and be pulled horizontally, and its focal point is the small part of the laser beam.

3, color spark method

To remove the nozzle of the fiber laser cutting machine, then blow in the air, and make the cutting head hit the stainless steel plate from top to bottom, the focus is when the blue spark is large.
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