Investigation of Milled Wood Surface Roughness

Abstract

The surface roughness of longitudinal milled birch wood samples as a function of main milling regimes such as milling
tool edge blunt radius ρ (10 μm ÷ 40 μm), feed rate of milling tool uz (0.5 mm ÷ 2.0 mm) and milling tool cutting speed
v (22.4 m/s ÷ 40.8 m/s) were investigated. The test bench with required testing regimes was created on the basis of
planning machine and by imitation milling edge radius blunt. The qualitative analysis of milled wood surface was
performed according to the results of optical microscopy. For quantitative analysis parameter Rmmax was calculated. It
was accepted as a difference between highest and lowest values of obtained surface irregularities in optical
microphotographs of samples cross-sections. It was obtained that the decrease of both milling tool edge blunt radius and
feed rate during milling, decreases the surface roughness and the quality of surface processing increases. The increase of
milling tool radial velocity leads on to the increase of surface processing quality, also. That leads on decrease of energy
consumption, too.