What is the difference between single-layer nozzle and double-layer nozzle for laser cutting machine

What is the difference between single-layer nozzle and double-layer nozzle for laser cutting machine?
The single-layer laser nozzle is used for melting cutting, that is, using nitrogen as the auxiliary gas to cut stainless steel and aluminum plates, etc., the single-layer laser nozzle with a specification of 1.4-3.0mm is used.
Double-layer laser nozzles are generally used for oxidation cutting, which uses oxygen as auxiliary gas. For cutting carbon steel, double-layer laser nozzles with specifications of 1.5-3.0 are used.

The main differences are as follows:

1. Nozzle structure
The structures of laser single nozzles and double nozzles are different. A single nozzle has only one outlet, while a double nozzle has two outlets, usually in a symmetrical shape. This dual-nozzle structure can improve the stability of the nozzle to a certain extent and make the nozzle easier to clean. However, dual nozzles are more difficult and costly to manufacture and install.

2. Processing efficiency
In terms of processing efficiency, the double nozzle is faster than the single nozzle because it can output two laser beams for cutting at the same time. In some application scenarios, it is very important to complete more work every second. Of course, this advantage comes with higher costs and more complex control technology.

3. Processing accuracy
The precision of laser processing is critical for many applications. In this regard, a single nozzle is usually more accurate than a double nozzle because by reducing the number of laser sources, a single nozzle can reduce the interference between laser beams, thereby improving the accuracy of processing. However, this processing method is also prone to problems such as cutting shock or "spraying".

4. Material applicability
The material suitability of the laser nozzle is also an important factor. Due to its simple structure, the single nozzle has wider applicability to certain materials. However, some large manufacturers (such as TRUMPF) have introduced materials such as copper and titanium alloys specifically designed for dual nozzles.

5. Advantages and Disadvantages
In summary, single nozzles and dual nozzles each have their own advantages and disadvantages. The single nozzle is simple and easy to use, has higher processing accuracy and wider application range, but the processing efficiency is slightly lower. The dual-nozzle processing efficiency is higher, but the manufacturing and installation are more complicated and the cost is higher. When selecting a laser nozzle, it needs to be based on the specific application.