How to improve laser cutting processing accuracy?
time：
2021-09-15
Nanjing New Focus is a company with over a decade of sales and maintenance experience in the laser industry. Committed to providing high-quality laser components and global laser repair services, we ensure to meet diverse laser-related needs worldwide.
Today we are going to introduce how to improve the processing accuracy of laser cutting. First of all, the cutting accuracy of a laser cutting machine is the primary factor to measure its quality：
1. The size of the laser condenser of the laser generator.After focusing, if the light spot is very small, the cutting precision will be very high. If the gap is very small, it proves that the precision of the cutting machine is very high and the quality is very good.However, the laser beam is conical, so the cut is also conical. In this case, as the thickness of the workpiece increases, its accuracy decreases, so the kerf becomes larger.
2. Workbench accuracy.If the accuracy of the workbench is high enough, the cutting accuracy will be higher. Therefore, the accuracy of the platform also has a very important impact on the accuracy of the laser generator.
3. Laser beam condensed into a cone.During the cutting process, the laser beam takes a conical shape. In this case, if the workpiece to be cut is very thick, the processing accuracy will decrease and the cut gap will be large.
4. Differences in cutting materials will also have a certain impact on cutting accuracy.Under the same conditions, the precision of cutting stainless steel and aluminum is different. The precision of stainless steel will be higher and the cutting surface will be smoother.
Generally speaking, the quality of laser cutting can be measured by six criteria.
- Roughness Rz of cutting surface
- Cutting residue size
- Trimming edge verticality and slope u
- Cutting edge fillet size r
- Stripe drag amount n
- Flatness F
The choice of processing materials has a great impact on processing accuracy.Under the same conditions, the cutting accuracy of different materials will be slightly different. Even for the same material, the cutting accuracy will be different due to different materials.
So, how to achieve high-precision processing during laser cutting?
- Focus position control technology
As the focal depth of the focusing lens decreases, the diameter of the focal spot also decreases, so it is very important to control the position of the focus during processing.
- Cutting and punching technology
Except in rare cases, all hot cutting processes require drilling a small hole in the board.Early laser stamping composite machines used a punching process. They first punched a hole in the punching hole, and then used a laser to cut the small hole.
- Mouth design and airflow control technology
During the steel cutting process, oxygen and a focused laser beam are ejected from the nozzle to the surface of the workpiece, forming an airflow beam on the surface of the workpiece.The most fundamental requirement is to have a large air flow and a high flow rate, so that it can be fully oxidized and the incision material can undergo a sufficient exothermic reaction;At the same time, there is plenty of power to eject molten material.
The above is the introduction of New Focus on how to improve the precision of laser cutting processing. We hope this post on laser knowledge proves helpful, adding support to your future laser cutting production endeavors.
For more posts on laser cutting or maintenance, please follow New Focus.
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