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Laser marking is the process of marking parts or workpieces using laser technology. The laser beam hits the material, and its energy response will leave permanent marks. The speed, power and focus of the laser beam on the part will lead to different laser processing processes. You can use laser engraving, laser etching, laser annealing, or laser ablation for marking. This article tells about the use process of the laser marking machine.
The following knowledge points are listed below:
Choose the right materials for marking
Choose the lasers system to produce different wavelengths
Different laser marking process offers different possibilities
The applications of laser marking machines
The light waves emitted by most industrial laser systems cannot be seen with the naked eye, so it is difficult to imagine. However, different materials respond differently to different wavelengths.
Each material has a unique composition that can absorb a specific wavelength without absorbing other wavelengths. Since lasers produce only one wavelength, they are highly specialized tools for marking specific materials. Therefore, different materials have different laser requirements.
Depending on the material, you need either a fiber laser system or a carbon dioxide laser system for your laser marking machine.
Different types of lasers emit different wavelengths depending on their gain medium (a component of the laser source). The material you are marking will determine which type of laser marking system you need for your laser marking machine.
(1) Fiber laser systems are the best for marking metal
Fiber laser systems are sometimes considered solid-state lasers. They have a laser light source that includes an optical fiber that contains rare earth metals such as europium. They produce lasers with a wavelength of about 1 micron (1064 nm). Most metals respond well to fiber laser marking machine.
(2) Gas-state laser systems are the best markers for organic materials
The gas state laser system has a laser source containing a gas. The most widely known gas laser is a carbon dioxide laser. These laser marking systems can produce lasers with wavelengths from 9 microns to 10.2 microns (9000-12000 nm). Most organic compounds respond well to these wavelengths. But contrary to fiber laser systems, metals react poorly to these wavelengths.
The application will depend on the laser marking process you need. For example, you may need to create highly resistant marks that cannot be erased. Alternatively, you may need to adapt the marking process within a specific cycle.
To choose laser processing, you must understand your needs and your production process.
(1) Laser engraving process to obtain laser engraved wear-resistant signs
Laser engraving deepens the material by breaking a portion of the material into dust. For example, laser engraving machines can be used for VIN marking, which usually requires deep markings to ensure durability and prevent counterfeiting. They can also be used for marking and need to resist aggressive post-treatments such as sandblasting.
(2) Laser etching is laser etching for high-speed, high-contrast marks
Laser etching is often used when the laser marking process must be integrated into a production line as quickly as possible. This technology can almost instantly melt the surface of the material, creating bumps on the surface of the material. For example, this produces high contrast black and white marks.
(3) Laser annealing is used to protect the material from damage, such as laser annealing
Laser annealing causes chemical changes below the surface of the material. Nothing is broken down, nothing is replaced, nothing is melted. This is the only solution for marking stainless steel, and its surface must remain unaffected by the marking. Laser annealing is also used for aesthetic applications such as trademarks. Although slower than other laser marking processes, it creates the most beautiful surface finish
An increasing number of manufacturing industries are choosing lasers as their marking solution. There are good reasons for this.
Laser marking machines provides complete traceability
With laser marking, you can mark parts directly and permanently. Unlike other marking methods, the marking process can be performed at the beginning of the production line.
Even if the marking is done before peening and e-coating, you can maintain high-quality marking throughout the life of the part. You don't have to worry about the quality of data matrix codes, barcodes, or alphanumeric serial numbers.
No consumables
The absence of consumables simplifies marking operations and replaces the use of chemicals or inks to help improve workplace health and safety. It is also cost-effective to dispose of consumables due to reduced annual operating costs.
You hardly need maintenance
Laser marking machines and laser marking systems have no moving parts, which means that their parts are less likely to break. As a result, laser marking machines require less maintenance and less waste than the machines they replace. Its laser source has high reliability, the average time before failure is 100,000 hours, and according to daily use, it can represent more than 10 years of operating time.
So do you have the concept about the use process of laser marking machine now? If you want to know about CNC Wood Working , MachineLaser Marking Machine, just follow us!
