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Proceedings Paper

High-quality laser cutting of ceramics through adapted process techniques
Author(s): Hans Kurt Toenshoff; Martin Gonschior
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Paper Abstract

Laser cutting of ceramics is a promising alternative to conventional machining methods. In this paper, processing results using several lasers and beam guidance optics to cut different oxide and non-oxide ceramics are presented. Adapted process parameters in pulsed mode operation provide high quality cut surfaces at acceptable feed rates. Especially Nd:YAG lasers can be used for cutting extremely brittle ceramics. The use of fiber optics for beam guidance, however, is limited to certain ceramics with high fracture toughness, due to a loss in beam quality. In laser cutting of ceramics, thermally-induced crack damage is one of the main problems preventing a wider use of this method in industry. Several methods were investigated in order to reduce crack formation. Adapted pulse parameters, calculated by a theoretical model, and also a newly-developed process control system lead to a remarkable reduction of crack damage. Crack-free cutting can be obtained by preheating the workpiece above a temperature of 1.100 degree(s)C. Based on these investigations, requirements on laser systems for ceramics cutting are worked out.

Paper Details

Date Published: 1 February 1994
PDF: 11 pages
Proc. SPIE 2062, Lasers as Tools for Manufacturing, (1 February 1994); doi: 10.1117/12.167585
Show Author Affiliations
Hans Kurt Toenshoff, Laser Zentrum Hannover e.V. (Germany)
Martin Gonschior, Laser Zentrum Hannover e.V. (Germany)

Published in SPIE Proceedings Vol. 2062:
Lasers as Tools for Manufacturing
Leonard R. Migliore; Richard W. Walker, Editor(s)

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