The effect of log heating temperature on the peeling process and veneer quality: beech, birch, and spruce case studies
TypeArticles dans des revues avec comité de lecture
Heating green-wood prior to peeling is necessary to improve both peeling process and quality of veneer. This study investigates optimum heating temperatures by soaking of beech, birch and spruce. Experiments have studied the influence of heating temperatures from 20 to 80 C on thickness deviations and veneer lathe checking using a pneumatic rugosimeter and image analysis of opening checks with the SMOF device (Système de Mesure de l’Ouverture des Fissures). Conclusions account for reduced heating temperatures compared to the temperatures currently in-use in the industry. Already at 50 C, positive effects of heating ensure efficient peeling process. Low temperatures produce veneers with deeper and more spaced checks than high temperatures when checks are closer and less deep, becoming even unpredictable especially in case of spruce. These results establish the SMOF as an essential non-destructive control device to control the quality of the veneer produced at research level.
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DUPLEIX, Anna; DE SOUSA MENESES, Domingos; HUGHES, Mark; MARCHAL, Rémy (Springer, 2013)There is a lack of quantitative data on the penetration depth and the amount of energy absorbed by green wood under infrared (IR) radiation. This lack of knowledge is a potential barrier to the development of IR heating ...
Experimental validation of green wood peeling assisted by IR heating – some analytical system design considerations BATSALE, Jean-Christophe; KUSIAK, Andrzej; HUGHES, Mark; DENAUD, Louis; DUPLEIX, Anna (De Gruyter, 2014)Experimental results have been used to validate a 2D simulation model in order to check its reliability in predicting the heating of a green log rotating under an IR heating source. For the purpose of validation, it was ...
DUPLEIX, Anna; OULD AHMEDOU, Sid' Ahmed; BLÉRON, Laurent; ROSSI, Frédéric; HUGHES, Mark (De Gruyter, 2013)Heating green wood logs by infrared (IR) radiation during peeling for veneer production has been numerically simulated, focusing on the heating kinetics of a green wood cylinder rotating with a decreasing radius. The results ...
Cutting Forces in basic and real life wood machining processes review, COST Action E35 2004-2008: Wood machining - Micromechanics and fracture MARCHAL, Rémy; MOTHE, Frédéric; DENAUD, Louis; THIBAUT, Bernard; BLERON, Laurent (De Gruyter, 2009)The data available in the literature concerning wood cutting forces permit to build models or to simulate the main wood machining processes (milling, sawing, peeling etc.). This approach contributes to a better understanding ...
Wood peeling process monitoring: a comparison of signal processing methods to estimate veneer average lathe check frequency DENAUD, Louis; BLERON, Laurent; EYMA, Florent; MARCHAL, Rémy (Springer, 2012)Experienced peeling operators are able to adjust the settings of their device by hearing the sound coming from the process. Based on this idea, a research program was undertaken to evaluate the possibility of using acoustic ...