MARKING-SYSTEMS 18b PAUL-ROELTGEN-STRASSE 10 · D-42699 SOLINGEN · TELEPHONE: +49 212 / 33 99-0 · FAX: +49 212 / 33 99 11 · WWW.ROELTGEN.DE · INFO@ROELTGEN.DE The processing of materials using ultrashort laser pulses can be carried out largely irrespective of the laser wavelength being used. This means that almost all materials can be processed, even those that are transparent to the laser wavelength. Another advantage of the ultrashort duration of the laser pulses is that the material ablation is not based on the generation of heat as is the case with standard fibre lasers. This is why picosecond lasers are used for all laser processing jobs where damage due to melting or any discolouration due to heat input is undesirable. A disadvantage of conventional marking of stainless steel using a fibre laser is that the surface gleams at certain viewing angles and the marking is barely recognisable as a result. In addition, the processed area tends to corrode. The strength of the material is also negatively impacted due to the thermal load placed on it during the marking process. This can result in warpage in the case of thin-walled sheet metal. In the marking of data matrix codes, in particular, these characteristics mean that the legibility of the code suffers. In contrast, the marking of stainless steel with a picosecond laser relies on a different process. The surface is still black but without the disadvantages described above. And the high-contrast laser marking can be read from all viewing angles. There is also no susceptibility to corrosion. The strength of the workpiece is not negatively impacted and the material can thus be marked without causing any warpage. Subject to design changes. 12-19 LASER MARKING SYSTEM PR1915 Edelstahl / Aluminium Glas
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