Determination of Surface Roughness Based on the Sanding Parameters of Oriental Beech Wood

This study demonstrated the strength of a theoretical model founded on the Box-Behnken experimental design method to determine the surface roughness (R-a parameter) of solid Oriental beech (Fagus orientalis Lipsky) wood. The working parameters (sanding belt grit size of 60 to 100, feeding speed of 4 m/min to 10 m/min, and sanding cutting depth of 0.1 mm to 0.3 mm) of a wide belt sanding machine were determined. The R-a of the samples was experimentally described so that the experimental results were also remodeled with the Box-Behnken method to find the optimum parameters for the lowest R-a. An adjusted correlation factor of 93.6% for the R-a confirmed the compatibility between the experimental and theoretical findings. The high correlation (strength) allowed for a more detailed discussion of the effect of the working parameters on the R-a. The theoretical approach showed that the grit size factor had the largest effect on the R-a compared with the other factors. The optimum parameters were found to be a grit size of 100, feed speed of 4 m/min, and sanding depth of 0.1 mm for a minimum R-a for Oriental beech wood. The experimental data supported these parameters.