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10 April 1989 Laser Micro Machining Of Material Surfaces
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Proceedings Volume 1022, Laser Assisted Processing; (1989)
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany
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.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. H. van Krieken, J. Groote Schaarsberg, and H. J. Raterink "Laser Micro Machining Of Material Surfaces", Proc. SPIE 1022, Laser Assisted Processing, (10 April 1989);

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