Analysis of chip formation mechanisms and modelling of slabber process
TypeArticles dans des revues avec comité de lecture
During the primary transformation in wood industry, logs are faced with conical rough milling cutters commonly named slabber or canter heads. Chips produced consist of raw materials for pulp paper and particleboard industries. The process efficiency of these industries partly comes from particle size distribution. However, chips formation is greatly dependent on milling conditions and material variability. Thus, this study aims at better understanding and predicting chips production in wood milling. The different mechanisms of their formation are studied through orthogonal cutting experiments at high cutting speed for beech and Douglas fir. Within these conditions, ejection of free water inside wood can be observed during fragmentation, particularly on beech. As previously seen in quasi-static experiments, chip thickness is proportional to the nominal cut thickness. Moreover, the grain orientation has a great influence on the cutting mechanisms, so as the nominal cut and the grows rings widths. This chip fragmentation study finally allows the improvement of the cutting conditions in rough milling. In order to optimize machine design as well as cutting geometry, a geometrical model of a generic slabber head is developed. This model allows the study of the effective cutting kinematics, the log-cutting edges interactions and the effective wood grain direction during cutting. This paper describes the great influence of the carriage position on cutting conditions. The results obtained here can be directly used by milling machine manufacturers.
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PFEIFFER, Renaud; COLLET, Robert; DENAUD, Louis; FROMENTIN, Guillaume; LORONG, Philippe (2013)During the primary transformation of wood, logs are faced with slabber heads. Chips produced are raw materials for pulp paper and particleboard industries. Efficiency of these industries is partly due to particle size ...
PFEIFFER, Renaud; MAIGRE, Hubert; COLLET, Robert; DENAUD, Louis; POT, Guillaume (FPInnovations, 2015)During the primary transformation in wood industry, logs are faced with conical rough milling cutters commonly named slabber or canter heads. Chips produced consist of raw materials for pulp paper and particleboard industries. ...
PFEIFFER, Renaud; LORONG, Philippe; RANC, Nicolas; COLLET, Robert; DENAUD, Louis; COTTIN, Fabrice (2014)La simulation numérique de l’opération de fraisage des grumes par slabber doit permettre de prédire les dimensions des plaquettes produites. Pour prendre en compte les spécificités de la coupe du bois. La Méthode des ...
Numerical study of the influence of veneer lathe checks on the elastic mechanical properties of laminated veneer lumber (LVL) made of beech POT, Guillaume; DENAUD, Louis; COLLET, Robert (De Gruyter, 2014)Laminated veneer lumber (LVL) is a well-known high-performance engineered wood product suitable for structural applications. However, the peeling process can induce lathe checks of the veneer with various depth and spatial ...
POT, Guillaume; DENAUD, Louis; COLLET, Robert; GIRARDON, Stéphane; COTTIN, Fabrice (FPInnovations, 2015)Laminated veneer lumber (LVL) is a high-performance engineered wood product made of several wood veneers bound together mostly in grain direction. Veneers are obtained thanks to peeling process. This cutting process induces ...