Generally, the fiber laser cutting machine is used to cut carbon steel in the positive focus mode, that is, the cutting focus is on the workpiece, and the focus is positioned above the cutting material.

Carbon Steel - Select the reason for positive focus cutting

For carbon steel oxygen cutting, positive focus is suitable for the following reasons:

1. The cutting width at the bottom of the workpiece is larger than that on the upper surface, which is conducive to slag removal;

2. It is conducive to oxygen reaching the bottom of the workpiece to participate in full oxidation reaction.

3. Within a certain focus range, the larger the positive focus is, the larger the spot size of the plate surface is, the more sufficient the preheating and heat supplement around the slit are, and the smoother and brighter the carbon steel cutting surface is.

Consequences caused by incorrect focus position of laser cutting carbon steel

If the focus of laser cutting carbon steel is not selected correctly, the following consequences will occur:

1. Burrs

2. Slag hanging

3. Incomplete cutting

4. Rough cutting surface

The focal position of laser cutting carbon steel is not correct, how to adjust it?

If the laser focus position is offset, the focus position test shall be conducted and adjusted according to the offset of the laser focus;

Therefore, carbon steel cutting generally uses the positive focus for processing, otherwise the quality of the processed workpiece will be defective. The laser cutting machine needs to use different focus modes to process different workpieces. Due to the different types of laser cutting heads, the focus adjustment methods are also different. Users also need to select appropriate laser cutting positions according to their own needs to maximize the advantages of the laser cutting machine.