Technical gazette, Vol. 23 No. 1, 2016.
Original scientific paper
https://doi.org/10.17559/TV-20150504150446
Investigation of the laser engraving of AISI 304 stainless steel using a response-surface methodology
Vladan Mladenovič
; Plastika Skaza d.o.o., Selo 20a, 3320 Velenje, Slovenia
Peter Panjan
; Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
Srečko Paskvale
; Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
Halil Çalişkan
; Bartin University, Department of Mechanical Engineering, 74100 Bartin, Turkey
Nastja Poljanšek
; Faculty of Mathematics and Physics University of Ljubljana, Jadranska ulica 19, 1000 Ljubljana, Slovenia
Miha Čekada
; Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
Abstract
In this paper we present the laser-beam engraving of a cold-rolled AISI 304 stainless-steel plate used for intaglio printing (e.g., banknotes and passports). This intaglio printing process allows the ink from a desired engraved pattern (e.g., microletters and images) to be transferred to a sheet of paper. The intensity of the colour and the ability to prevent the forgery of raised characters that appear on the paper correspond to the channel geometries formed by the laser-beam engraving. In order to obtain the appropriate channel geometry, and to avoid time-consuming, trial-and-error experiments, the engraving parameters must be optimized. For this purpose the Design of Experiments method and the orthogonal array L27 (34) were selected. A statistical analysis ANOVA at the 95 % confidence level was performed using the statistical software. It was found that the scan speed is the most significant factor affecting the groove geometry.
Keywords
AISI 304 stainless-steel; analysis of variance; design of experiments; laser-beam engraving; response surface methodology
Hrčak ID:
153180
URI
Publication date:
19.2.2016.
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