One important characteristics of laser beam welding is the penetration depth. Traditionally, it is determined by time-consuming and destructive cross-sectioning, but an online monitoring and eventually control system is desired. The measurement of the capillary depth in deep-penetration laser welding by optical coherence tomography (OCT), an interferometry measuring method, has been shown to be a sensing principle that allows an online in-situ measurement. It works in a wide range of industrial applications and delivers accurate data.
In this paper we investigate the capability of the method and determine its restrictions.
REFERENCES
1.
J.
Griebsch
, P.
Berger
, F.
Dausinger
, H.
Hügel
(1994
), Diagnostic Techniques and Process Monitoring of Pulsed Laser Welding
, Proc. of SPIE
Vol. 2246
, pp. 136
2.
Ch.
Kratzsch
, et al (2000
), Coaxial process control during laser beam welding of tailored blanks
, Proc. of SPIE
Vol. 3888
, pp. 472
3.
Volker
Rominger
(2011
), High-performance laser welding
, Laser Technique Journal
Vol. 3
/2011
, pp. 32
4.
James M.
Fraser
(2011
) Inline coherent imaging of laser processing
, Proc. of SPIE
Vol. 7925
, 792516
5.
R.
Schmitt
, G.
Mallmann
(2013
), Process monitoring in laser micro machining
, Photonik International
2013
6.
Thibault
Bautze
, Markus
Kogel-Hollacher
(2014
) Keyhole Depth is just a Distance
, Laser Technik Journal
Vol. 4
/2014
, pp. 39
7.
P. J. L.
Webster
, et al (2014
) Automatic laser welding and milling with in situ inline coherent imaging
, Opt. Lett.
Vol. 39
, No. 21
, pp. 6217
This content is only available via PDF.
© 2016 Laser Institute of America.
2016
Laser Institute of America
You do not currently have access to this content.