This article introduces an important function in the fiber laser cutting machine: lightning perforation. Lightning perforation is a variable frequency perforation technology. By changing the frequency and duty cycle in real time, the energy can be kept stable to the greatest extent during the perforation process, and high-efficiency perforation can be achieved with the drop of the Z axis. This article also provides some ideas and suggestions for adjusting parameters, such as initial frequency, duty cycle, end frequency, etc., as well as other perforation parameters such as time and focus.

Lightning perforation technology has been relatively mature in the laser cutting industry and is widely used in major OEMs.

Principle of lightning perforation:

Lightning perforation is a variable frequency perforation technology that stabilizes the energy and reduces the risk of explosion by changing the frequency and duty cycle in real time. During the perforation process, the frequency and duty cycle show a linear decrease trend to keep the energy stable to the greatest extent.

Parameter adjustment method

1. Frequency and duty cycle

During the lightning perforation process, the initial frequency and duty cycle can be set to a higher value to quickly penetrate the material. However, as time goes by, the frequency and duty cycle need to be gradually reduced to reduce the total energy and avoid the occurrence of explosion holes. The recommended parameter range is an initial frequency of 3000-4000, a duty cycle of 60%, an end frequency of 1000, and a duty cycle of 45%-40%. These parameters can be adjusted according to specific materials and requirements.

2. Other parameter adjustment

In addition to frequency and duty cycle, perforation time and focus position are also key parameters for adjustment. The perforation time should be adjusted according to the material thickness. Thicker materials may require cascade perforation, that is, first perforation, then lightning perforation. It is generally recommended to adjust the focus position slightly downward to keep the nozzle from heating up, which can increase the perforation speed of the metal fiber laser cutting machine.