This is because the machine tool (only for high-power laser cutting machines) does not use blasting and drilling to make small holes, but pulse drilling (soft puncture), which makes the laser energy also concentrated in a small area.
The non-processed area will also be burnt, causing hole deformation and affecting the quality of the process.
At this time, we need to change the vein piercing method (soft puncture) to the flat puncture method (ordinary puncture) in the development process to solve the problem.
On the other hand, for lower power laser cutting machines, pulse drilling is used to make small holes to improve the surface finish.