3D-Characterisation of Sheet Metal and Roller Surfaces by Means of Confocal Microscopy


Article Preview

The measurement and evaluation of sheet metal surface characteristics is of increasing importance, due to the significant functional impact on finishing processes like forming and varnishing. For a comprehensive and useful description of textured topographies including nonstatistical characteristics, a simple profile evaluation based on 2D roughness parameters is no longer sufficient. The introduction of area-imaging white light confocal microscopy offers, in contrast to tactile profiling methods of comparable accuracy, the clear advantage of contact-free and extremely fast 3D data capture. The capabilities and benefits of this technology in interaction with sophisticated 3D area analysis methods are demonstrated by measurement examples of sheet metal and roller surfaces. A newly-developed mobile confocal measurement system for direct roller measurements is introduced.



Main Theme:

Edited by:

M. Geiger, J. Duflou, H.J.J. Kals, B. Shirvani and U.P. Singh




J. Valentin et al., "3D-Characterisation of Sheet Metal and Roller Surfaces by Means of Confocal Microscopy", Advanced Materials Research, Vols. 6-8, pp. 543-550, 2005

Online since:

May 2005




[1] Staeves, J.: Beurteilung der Topografie von Blechen im Hinblick auf die Reibung bei der Umformung, Ph.D. thesis, Darmstadt University of Technology, Germany, Shaker Verlag Aachen, Band 41 (1998).

[2] DIN EN ISO 4287 (Roughness parameters).

[3] Geiger, M., Pfestorf, M.: Dreidimensionale Oberflächenanalyse bei Feinblechen, Stahl und Eisen 115: 47-53, (1995).

[4] Neudecker, Th.; Popp, U.; Schiffer, R.; Engel, U.: Meßvorschrift zur Bestimmung funktionaler 3D-Oberflächenkenngrößen für die Blechumformung., UTF Science II/2001, 12- 17 and III/2001, 34-38.

[5] Kagerer, B.; et al: 3D-confocal microscopy for surface analysis of microstructured materials, SPIE Proceedings 4773 (2002), 52-62.

[6] Weber, M.A. et al: Konfokale 3D-Mikroskopie zur Mikrotopographie- und Geometriemessung Technischer Oberflächen, VDI-Berichte 1808 (2003) pp.199-204.

[7] Weber, M., Leitz, M.: Konfokale Weißlichtmikroskopie für die Zylinderlaufflächeninspektion, QZ 5/2003, 478-479.

[8] Weinert, K.: Entwicklung, Stand und Tendenzen bei Schneidstoffen und Beschichtungen, Schmalkaldener Werkzeugtagung, 11/2004, Schmaldkalden, Germany.

[9] Johlen, G.: Prozessoptimierung für die Hartfeinbearbeitung durch die Kombination von Hartdrehen und Schleifen, Ph.D. thesis, University of Dortmund, Germany, Vulkan Verlag, Essen, Band 22 (2003).

[10] ISO 5436-1, Type A, C, D (Roughness & Depth measurement standards).

[11] Minsky M.: Microscopy Apparatus, U.S. Patent 3013467 (19 Dec. 1961, filed 7 November 1957).

[12] Wilson, T.: Depth response of scanning microscopes, Optik 81 No 3, 113, (1989).

[13] Corle T.R., Chou C.H., Kino G.S.: Depth response of confocal optical microscopes, Opt. Lett. 11(12), 770-772 (1986).

DOI: https://doi.org/10.1364/ol.11.000770

[14] Popp, U.; Neudecker, Th.; Engel, U.; Geiger, M.: Surface Characterization with Regard to the Tribological Behaviour of Sheet Metal in Forming Processes., Proceedings of the 7th International Conference on Sheet Metal, Erlangen (1999), 303-310.