Parts marking

Parts marking

Part marking is the process of applying a permanent mark (such as a serial number, QR code, barcode, or text) to the surface of a part during the manufacturing process. This is used for product traceability, quality control, and anti-counterfeiting. It is typically applied to parts made of metal, plastic, or other materials to ensure identification and tracking throughout their lifecycle.

How does laser marking work?

The working principle of the laser marking machine is to use a focused high-energy laser beam to act on the surface of the material, changing its physical or chemical properties to form a mark.

The process involves three steps: a laser source generates a beam, which is focused by an optical system;

The beam interacts with the material, causing evaporation, oxidation, color change, or ablation, creating a permanent mark;

A control system (such as software) guides the laser path to achieve a precise pattern.

What are the differences between different laser marking machines?

Different types of laser marking machines differ based on the laser source and application. When choosing, 

consider material compatibility, marking speed, accuracy, and cost:

Fiber laser marking machines: Suitable for metals, with high power and long life, but generally 

less effective on non-metals; they prioritize high speed and durability.

CO2 laser marking machines: Suitable for non-metals (such as plastics and wood), 

with low cost but large size; they are suitable for marking large areas.

UV laser marking machines: Cold-processing machines, suitable for plastics and glass,

 offer high accuracy and low thermal impact; they prioritize fine marking.

MOPA laser marking machines: Flexible for color marking or special materials; 

they prioritize customized applications.

Hidden Costs and Maintenance

CO₂ lasers: RF tubes require regular replacement (lifespan approximately 20,000 hours), 

and gas refill costs are high.

UV lasers: The frequency-doubled crystals have a limited lifespan (10,000-20,000 hours) and 

are sensitive to ambient temperature and humidity (requires constant temperature).

Fiber lasers: Maintenance-free (lifespan 100,000 hours), but high-power models require water

 cooling to avoid thermal lensing.