On acoustic emissions in percussion laser drilling
Laser drilling is a well established sheet metal processing method. The development of a monitoring system capable of assessing the dimensions of holes is the subject of this work. This paper investigates the applicability of an acoustic-based monitoring system for the percussion laser drilling process. Correlation between the sensor output and the hole's geometry, determined by its depth and upper diameter, is investigated and the results are presented. In general, the results indicate that a correlation exists between the acoustic signal output and the depth of the hole.
KeywordsPercussion laser drilling Process monitoring Acoustic emissions Geometrical characteristics
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- 1.Chryssolouris G (1991) Laser machining: theory and practice. Springer, New YorkGoogle Scholar
- 2.Ready JF (2002) LIA handbook of laser materials processing. Laser Institute of America, Magnolia, ToledoGoogle Scholar
- 13.Gu H, Duley WW (1996) A statistical approach to acoustic monitoring of laser welding. J Appl Phys 29:556–560Google Scholar
- 23.Tonshoff HK, Ostendorf A, Korber K, Hillers O (2001) Principles of reference-free process monitoring for laser material processing based on a multiple sensor system. In: Proceedings of the 20th International Congress of Lasers and Electro-Optics (ICALEO), Jacksonville, 15–18 October 2001.Google Scholar