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Proceedings Paper

Laser Micro Machining Of Material Surfaces
Author(s): A. H. van Krieken; J. Groote Schaarsberg; H. J. Raterink
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Paper Abstract

For high precision fabrication of fine structures and for making fine surface textures - a predefined finishing roughness on surfaces - several laser processing techniques are developed at TNO. The laser micro milling technique is applicable to make blind holes, grooves and other programmed shapes. It is a self-adjusting technique applicable e.g. in the manufacturing process of high precision parts for the tool-making industry. The removal of material is achieved by local and repeatedly evaporation of small quantities of material from the workpiece-surface. The ablation rate or milling rate is determined by the laser fluence, the powerdensity and the way the process is programmed. For circular and rectangular shapes recipes are developed, which can be combined for other shapes. A patent on this work, which is carried out in a Brite program* is in preparation. An application of the laser surface texturing technique, by which a variety of finishing roughness reproducable can be achieved, is the making of predefined surface textures on metal moulds for duplicating the texture on plastics products. A laser surfacing technique, which results in glazy layers on metal surfaces, with interesting properties will also be reported. The processes described require lasers and deflection systems which parameters are of good repeatability and constancy; such equipment is available on the market. For the reported work a Nd-YAG laser processing machine is applied while short pulses with a high peak power and high powerdensities on the workpieces surface are required. The technique described can be used for both metallic and ceramic materials.

Paper Details

Date Published: 10 April 1989
PDF: 4 pages
Proc. SPIE 1022, Laser Assisted Processing, (10 April 1989); doi: 10.1117/12.950096
Show Author Affiliations
A. H. van Krieken, TNO Institute of Applied Physics (The Netherlands)
J. Groote Schaarsberg, TNO Institute of Applied Physics (The Netherlands)
H. J. Raterink, TNO Institute of Applied Physics (The Netherlands)

Published in SPIE Proceedings Vol. 1022:
Laser Assisted Processing
Lucien Diego Laude; Gerhard K. Rauscher, Editor(s)

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