In this paper, an experimental model for the rapid measurement of surface roughness (Rrms) in CNC face-milling specimens using the laser speckle method and digital image processing is established. The specimens used in this study were made of 6061-aluminum alloys through the high-speed face-milling process. In order to evaluate the effect of machining conditions, such as the feed rate, the spindle speed, the depth of cut, and the material of the cutting tool on the roughness of the specimens, the Taguchi method was used to determine the optimal parameters for machining. The laser radiation results in the speckle structure formed in the space when coherent light is scattered through an optically rough surface. The features of the speckles depend on the characteristics of the rough surfaces. Hence, the experimental work for the roughness measurement is based on the speckle effect. The experimental setup in this study consisted of a He-Ne laser, a ground glass, a CCD camera, and a digital image processing system developed using the Virtual Basic language. Computer evaluation of the speckle images revealed the values of Rrms rapidly. This study proposed a precise and non-contact optical method for evaluating the surface roughness from 0.20 to 0.60 μm.
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Beckmann P, Spizzichino A (1963) The scattering of electromagnetic waves from rough surfaces. Pergamon, New York
Takai N (1975) Relation between statistical properties of surface roughness and the averaged speckle intensity in the diffraction field. Opt Commun 14(1):24–29
Bannett JM (1985) Comparison of techniques for measuring the roughness of optical surfaces. Opt Eng 24(3):380–387
Peiponen KE, Tsuboi T (1990) Metal surface roughness and optical reflectance. Opt Laser Technol 22(2):127–130
Galante G, Piacentini M, Ruisi VF (1991) Surface detection by tool image processing. Wear 148(2):211–220
Domanski AW, Wolinski TR (1992) Surface roughness measurement with optical fibers. IEEE Trans Instrum Meas 41(6):1057–1061
Blessinq GV, Slotwinski JA, Eitzen DG, Ryan HM (1993) Ultrasonic measurements of surface roughness. Appl Opt 32(19):3433–3437
Pancewicz T, Mruk I (1999) Holographic contouring for determination of three-dimensional description of surface roughness. Wear 199(1):127–131
Lukaszewski K, Rozniakowski K, Wojtatowicz TW (2001) Laser examination of cast surface roughness. Opt Eng 40(9):1993–1997
Yim DY, Kim SW (1990) Optical roughness measurement of ground surfaces by light scattering. Int J Mach Tools Manuf 30(2):283–289
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Lo, S., Chiu, J. & Lin, H. Rapid measurement of surface roughness for face-milling aluminum using laser scattering and the Taguchi method. Int J Adv Manuf Technol 26, 1071–1077 (2005). https://doi.org/10.1007/s00170-004-2073-z
- Surface roughness
- Laser scuttering
- Taguchi method