HOLTA ÇOTA, DRITAN AJDINAJ, BESNIK HABIPI
1Department of Wood Industry; Agricultural University of Tirana, ALBANIA
e-mail: * hcota@ubt.edu.al, dajdinaj@ubt.edu.al, besnikhabipi@hotmail.com
Abstract
In this research, the effect of different machining processes on wood surface roughness was studied. There were applied three main furniture manufacturing processes, respectively planning, routing and sanding. The sanding process was applied twice, respectively with 100 and 120 grit sandpapers. The study was focused on two main native wood species, beech (Fagus sylvatica L.) and fir (Abies alba Mill.). The specimen samples were sawn with dimensions 90×8×2 cm, with 11% moisture content. For each machine were processed two specimens from each species. Routing process was carried out after planning, as well as sanding. Sanding process with 120 grit paper was conducted after the 100 grit process, respecting so the processing line applied by manufacturing sector. For measurement of surface roughness was applied the direct contact method. This method reproduces the surface profile by means of contact stylus profilometer, making so possible the calculation of arithmetic mean deviation of the profile, maximum two point height of the profile, mean roughness depth and root-mean-square deviation of the profile. The measurements were performed in ten different clear wood points for each specimen. Results showed that fir wood gave the same class of roughness for all machining processes, respectively 8. Regarding to beech wood, planning and routing processes gave the same roughness class, equal with those of fir, while sanding gave a higher class for both numbers of sandpapers, respectively 9. The results obtained present useful information for furniture manufacturing sector, by the cost effective viewpoint.
Keywords: machinig, wood, furniture, surface, roughness class.
