Towards high cutting speed in wood milling

Abstract

-High cutting speed machining processes have been used for about 10 years for metals. This technology presents many advantages related to output and surface quality. For timber machining, commonly used velocities are already high. However, literature about cutting velocity function during a machining process is rare. Nevertheless, some published results have shown the effect of speed on chip formation. In order to perform experiments at high cutting speeds, we used a prototype model of a CN routing machine, which allowed us to conduct machining from 3 m s -1 to 62 m s -1 . Surface analysis was carried out by an optical roughness measurement device. The wood species studied is beech. Tests have been performed with constant chip thickness value.wood / milling / cutting speed / surface quality Résumé -Utilisation des grandes vitesses de coupe dans le fraisage du bois. Depuis une dizaine d'années, l'industrie des métaux a recours au procédé d'usinage à grande vitesse. Ses principaux avantages résident dans l'augmentation du débit matière ainsi que l'amélioration des surfaces usinées. Dans le domaine de l'usinage du bois, les vitesses de coupe sont déjà très élevées de telle sorte que les limites techniques sont pratiquement atteintes. Concernant la vitesse de coupe, peu d'informations existent sur son effet au cours du procédé d'usinage. Cependant, certains travaux traitent de l'effet de la vitesse sur le mode de formation du copeau. Afin d'analyser ce rôle de la vitesse, nous avons acquis une défonceuse à commande numérique permettant une gamme de vitesses de coupe de 3 m s -1 à 62 m s -1 . Une première série d'essais de contournage sur du hêtre, parallèlement et perpendiculairement au sens des fibres est présentée ici. Les surfaces obtenues sont analysées à l'aide d'un rugosimètre à capteur optique.bois / défonçage / vitesse de coupe / état de surface

Cutting Power during Cross-Cutting of Selected Wood Species with a Circular Saw

“…The increase in cutting power was mainly due to the 2 cm (29%) increase in the cutting height of the experimental sample compared to the other two cutting models, which caused an increase in the number of saw blade teeth in the cross-section. These findings confirmed the conclusions of Costes and Larricq (2002) and Mikleš et al (2010), who found that an increase in the cutting height of materials results in an increase in cutting power and the force required to cut the wood.…”

Determination of Optimal Machining Parameters of Massive Wooden Edge-Glued Panels Made of European larch (Larix decidua Mill.) using Taguchi Design Method

“…Additionally, some researchers have explained that cutting speed has no effect on surface properties for large ranges of speed. Others reported that cutting speed has a slight effect depending on the process conditions (Costes and Larricq 2002). The value of surface roughness is higher at 12000 rpm than 8000 rpm.…”

“…Computer numerical control has been used for grooving, milling, and patterning of furniture materials. The use of CNC has good advantages with respect to the speed, surface quality, and precision machining of work pieces (Costes and Larricq 2002;Ohuchi and Murase 2005;Karagoz et al 2011;Alves et al 2015).…”

Discrimination of coated carbide tools wear by the features extracted from parallel force and noise level

“…For this discussion, relation between parallel force and cutting speed for the final cutting length is provided in Figure 5. The increase in the parallel force with an increase in cutting speed was caused by larger relaxation of the work material on the clearance face [2] and greater amount of clearance wear [5], which further caused high rubbing pressure on the clearance surface of the coated carbide tools, being attained by the cutting tools for the high cutting speed. Experimental results in Figure 5 show that the TiN/AlN coated carbide tool generated the smallest parallel force for all cutting speeds at the final cutting length among the tools investigated.…”