ASSESSMENT OF THE FINAL QUALITY OF THE SANDED SURFACES IN CASE OF BIRCH WOOD

Pro Ligno. 2013;9(3):13-25

 

Journal Homepage

Journal Title: Pro Ligno

ISSN: 1841-4737 (Print); 2069-7430 (Online)

Publisher: Editura Universitatii Transilvania din Brasov

Society/Institution: PRO LIGNO Foudation

LCC Subject Category: Agriculture: Forestry

Country of publisher: Romania

Language of fulltext: English

Full-text formats available: PDF

 

AUTHORS

Adriana FOTIN
Camelia COSEREANU
Luminita Maria BRENCI

EDITORIAL INFORMATION

Open peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 6 weeks

 

Abstract | Full Text

The objective of the experimental researchpresented in this paper was to analyze theroughness parameters characterizing the final qualityof the birch wood surfaces, industrially sanded withthree successive grit sizes, namely 100, 120 and150. Sets of samples were analyzed for eachsanding direction, parallel and perpendicular to thewood grains, respectivelly. The variables of theprocessing parameters were considered to be thefeed speed and the cutting depth. łhe roughnesswas measured on a standard optical profilometertype FRT MicroProf for the two cases of wetting andno wetting the measured area. Three roughnessparameters were determined: Ra, Rk and Rpk. Theassessment of the quality of the sanded surfaceswas carried out by comparing these parameters,depending on the applied processing parameters.The experimental results were analyzed withANOVA test of variance with two factors for eachsanding technology and direction of processing, atthe same feed speed and various cutting depths, forboth dry and wet sanding.It was found that the quality of the prewettingsurfaces was very close to that of the drysanded surfaces, fact that recommends the use ofdry sanding, thus eliminating additional labor costs.The final sanding parallel to the wood grainsrecorded best results for the dry process with 150grit size. ANOVA conclusions have shown that theparallel sanding operation with low speeds issignificantly influenced by the cutting depth and also,that the influence disappears at high feed speeds.When sanding perpendicular to the wood grains, onthe other hand, the cutting depth has a significantinfluence when feed speeds are higher. The resultsof the present research go into recommendations ofsome sanding technologies for birch wood surfaces,in the idea of introducing birch wood as timber rawmaterial for furniture production also in Romania,too.