Metal Laser Engraving Service
The labelling of objects plays a role in many areas. Both in industry and business as well as in the private sector, labels or symbols find their place on a wide variety of surfaces. This also applies to numerous things made of metal. Engravings on metal objects should usually not only provide them with signs or inscriptions for a short time. Above all, they are intended to be permanent be. Unlike an inscription where the characters are only applied to the surface, laser engraving on metal cannot simply fade over time. A metal laser engraving is one of the most durable and in the truest sense of the word most profound forms of marking.
Metal Lasering
Of course, in the field of "engraving laser metal" not only the appropriate expertise is required, but you also need the necessary tools. And it there are differences in metal lasering. Thus, a laser engraving metal is not to be confused with the so-called laser printing. The latter does not process the material itself and is therefore less durable. In a laser engraving metal, the laser transmits a high-energy radiation to a surface, which permanently changes the corresponding material. To achieve this, our metal laser engraving service works with two different methods of laser engraving metal. On the one hand, this is the so-called CO² laser, on the other hand, the fiber laser. Below is a brief and simplified explanation of both devices.
How does a CO2 laser work?
Definition and classification
The CO² laser developed by Kumar N. Patel in 1964 belongs to the group of so-called gas lasers and is used in various areas of industrial metalworking as well as in metal laser engraving.
How is the laser generated?
The generation of the laser itself is carried out by the principle of excitation. Electromagnetic waves are irradiated by means of high voltage and a frequency of several million Hertz into a gas mixture consisting of carbon dioxide, nitrogen and helium. The excitation brings CO² molecules to a higher energy level. The energy generated in this way is produced in a so-called Resonator stored. By stimulated emission, photons in the mid-infrared range can subsequently produce twin photons, which are of this stored energy. This creates a kind of avalanche effect and the energy is potentiated.
How is the laser used?
The generated laser can now be directed via mirrors specifically to the corresponding workpiece, where it ensures temperatures that are above the corresponding evaporation temperature of the material. This creates the engraving.
How does a fiber laser work?
Definition and classification
A fiber laser is not based on gas, but uses an optical fiber to generate the photons, which resembles an optical fiber, as it is also used from the field of telecommunications.
How is the laser generated?
Even with a fiber laser, photons must be excited. But this is done by a semiconductor diode pump. The photons excited by the laser diodes are generated in a fiber optic cable and also transmitted via it. A complex arrangement of 3 layers, each with very specific light refraction properties ensure the imitation of the laser function and at the same time the optimal transmission of the pump energy. The extremely flexible fiber optic cables eliminate the need for mirrors.
How is the laser used?
The effect of the fiber laser on the metal surface is the same as with a CO² laser. The difference lies in the generation of the laser itself.
What is the difference between CO2 and fiber lasers?
Both types of lasers have their advantages. The CO² laser with its relatively high efficiency of 15 % is quite inexpensive to purchase.
The fiber laser, on the other hand, can be used very flexibly thanks to the use of glass fibers, it is light and small and does not require mirrors, which would have to be aligned perfectly. Also, the cooling process is much more efficient and the laser achieves an extremely favorable conversion ratio between the electrical energy and the power of the beam
Possible uses
The metal laser engraving service enjoys great popularity. This is not least due to the fact that there are numerous possible applications. Practical and practical areas of application include the numbering of individual parts in series production and the attachment of machine-readable QR codes. Laser engraving on metal is also used in the production of stamps and embossing tools. Perhaps even better known is the inscription of signs, jewelry or utensils. In addition to metal laser engraving, other materials can also be engraved with lasers such as plastics, wood, acrylic and plexiglass or, perhaps for some surprising, also paper, cardboard and leather.
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