Analysis of perforation method of laser cutting machine

Hongte Laser Cutting Machine

Perforation is what the laser cutting machine is good at. It is applied to different materials and used in different ways. How many perforation methods are there for laser cutting machines? The answer is two kinds, one is blasting perforation and the other is It is pulse perforation. Both of these are common methods of laser cutting machine perforation. What are the differences between the two methods, and what are their uses and characteristics?

We often encounter perforation in laser cutting processing. This perforation refers to the use of a laser cutting machine to make a small hole in a metal sheet. The laser perforation process is mainly used in the precision instrument industry because of precision There are many holes in the metal material of the instrument. The early perforation process is generally used in the watch industry, and mechanical drilling is used. Because mechanical drilling is contact processing, it is particularly easy to damage the workpiece. Laser cutting machine is used for non-contact processing. It is an ideal solution. There are currently two good methods for laser cutting and perforation.

The first method: blasting and perforating

Blasting and perforating, the material is irradiated with a continuous laser beam to form a pit in the center. Blasting perforation has a larger perforation hole diameter for thicker plates and is not round. This process is not suitable for use on parts with higher precision requirements. In addition, since the perforation uses gas, the splash is relatively large. The advantage is that it is fast, but the disadvantage is that it affects the processing of small shapes.

The second method: pulse perforation

Pulse perforation uses high peak power pulse laser to melt or vaporize part of the material cutting track. Air or nitrogen is often used as auxiliary gas to reduce the expansion of the hole due to exothermic oxidation. Each pulse only produces tiny splashes, and the cutting is gradually deepened, so it takes a few seconds for the thick plate to perforate. In this way, the perforation diameter is smaller, and the perforation quality is better than blast perforation. The advantage is that the quality is better, but the disadvantage is that the cost is relatively high, and a more reliable air circuit control system is required.

In the actual processing process, which method should we choose? Hongte laser cutting machine manufacturer reminds you that it is agreed to choose according to the actual situation. For example, do not use blasting perforation when processing small holes. This will cause the laser energy to be too concentrated, scorch the non-processed area, cause deformation of the hole, and affect the processing quality. In short, not every method is practical for all processing, and a reasonable perforation method should be selected.

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