Views: 0 Author: XDLASER Publish Time: 2021-09-23 Origin: XDLASER
In recent years, the heat of 10000w 20000w 30000w fiber laser cutter has continued to rise. With the rapid development of China's high-speed railway, shipbuilding, petrochemical industry, aerospace and other fields and the continuous breakthrough of laser cutting technology, the requirements of high power, large format, high-speed cutting, ultra thick plate cutting, bright surface cutting and high verticality of cutting mouth have gradually become the development direction of 10000 watt laser cutting machine.
The key to the 10000 watt laser cutting machine lies in the word "10000 watt". Its optical path system is mainly composed of 10000 watt laser, transmission fiber and laser head. In order to make the 10000 watt laser cutting machine have stable cutting effect, we must first have a stable and powerful laser light source, which comes from the laser.
1. Stable
The lasers of 10000 watt laser cutting machine belong to the category of continuous lasers, and continuous lasers are divided into single-mode (block) lasers and multi-mode (block) lasers. Taking a well-known domestic laser manufacturer as an example, its single-mode continuous laser power can reach 6000W, which is the highest output power level of single-mode continuous lasers in China. When there is only one pump module inside the laser, it is called a single-mode laser, that is, there is only one pump module inside the 6000W single module CW laser.
At present, the domestic lasers equipped with ultra-high power CW lasers, especially the 10000 watt laser cutting machine, are multimode CW lasers. Generally speaking, high-power multimode CW lasers are coupled with the light source of low-power single-mode CW laser (i.e. single pump module) through beam combiner. For example, the multimode CW laser of a 12000W laser cutting machine can be coupled with two 6000W pump modules. The fewer single pump modules used in a multi module CW laser, the higher the reliability, the more modules, the more complex the circuit and the higher the damage rate.
Compared with foreign high-power lasers, China's 10000 watt lasers are still dominated by multi-mode continuous lasers, while foreign excellent high-power lasers have achieved the technical level of maximum single-mode output of 20 kW and maximum multi-mode output of 500 kW. The production technical level of high-power lasers in China needs to be improved.
2. Powerful
Next, let's talk about why the laser beam emitted by the 10000 watt laser can cut ultra thick plates.
Let's start with a knowledge point. Single mode lasers have fine fiber core diameter, fine spot and high aggregation energy, and the core diameter of single-mode lasers is generally 50 μ m、100 μ M is the standard, while the 10000 watt laser passes the ultra-high power laser beam through 100 μ M fiber core diameter output, its energy power density can be imagined.
3. Bright surface cutting
Characteristics of bright surface cutting: smooth section, small section taper and fast cutting speed. It is suitable for complex graphics cutting without burning angle and has limit power (when the laser power does not reach the limit power, the higher the power, the better the cutting effect (cutting speed), but once the limit cutting power is exceeded, it is meaningless to increase the laser power).
Generally speaking, the beam quality of single module CW laser is better than that of multi module CW laser. Single mode CW laser has unique performance in cutting thin plates, but the cutting ability of thick plates is not good; On the contrary, the cutting performance of laser with poor beam quality is better than that of laser with good beam quality. Therefore, in order to make up for the deficiency of the performance of single-mode laser cutting thick plates, the technical innovation flat top ring light output is adopted to weaken the focus energy accumulation and strengthen the ring energy. In this way, the 10000 watt laser cutting machine coupled by single-mode CW laser has better cutting effect and cutting speed in super thick plate cutting.
By the way, the price of higher power laser sources is getting lower and lower,more and more factories can afford it.
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