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

Abstract

This study assessed the effect of selected factors, such as the feed force (Ff = 15, 20, and 25 N), wood species (beech (Fagus sylvatica L.), English oak (Quercus robur L.), and spruce (Picea abies L.)), and the number of saw blade teeth (z = 24, 40, and 60) on cutting power in the cross-cutting of lumber. The cutting was done using a circular saw with a rotating motion of the saw blade at a constant cutting speed (vc) of 62 m.s -1 . The tangentially bucked lumber had a relative humidity (wr) of 12% ± 1% and a thickness (e) of 50 mm. For the experiment, four circular saw blades with SK plates, a uniform diameter (D = 250 mm), and identical angular geometry (angle of clearance (α) = 15°, wedge angle (β) = 60°, and rake angle (γ) = 15°) were used. The saw blades had a different number of teeth (z = 24, 40, and 60), and one saw blade had 24 teeth and a chip limiter. The aim of this study was to expand the knowledge about the resulting cutting performance with different combinations of technological process parameters.

Feed Force and Sawdust Geometry in Particleboard Sawing

“…Heisel et al (2007) specified that with increasing of feed rate, the normal and parallel force increases. Many other authors showed that the cutting force increases with feed rate (or feed force) [ 8 , 10 , 11 , 12 , 13 ]. Dippon et al (2000) [ 14 ] discussed the cutting forces during machining MDF (Medium Density Fiberboard) where the cutting force and feed force were expressed as functions of cutting speed, feed rate, cutting depth and rake angle (tool geometry) [ 15 ].…”

Impact of Irregular Tooth Pitch of Circular Saw Blades on Power for Wood Cross-Cutting

“…Circular saw blade cutting is the most widely spread way of wood sawing. Owing to different design and construction of circular saw blades, it is possible to cut in different ways with respect to the wood fibers (Kminiak et al, 2016;Strelkov, 2009;Naylor et al, 2012).…”

Ağaç Malzemelerin Daire Testere Makinelerinde İşlenmesinde Testere Geometrisi ve Uygulama Koşullarının Önemi

“…The fact that the saw diameter is bigger, number of teeth more and feed speed less is very effective in terms of machining efficiency and surface roughness in selection of saw blade in the machining of high-density materials (Table 3). It is possible to increase the capacity and to obtain quality products by reducing the processing costs by selecting the appropriate tools [9,35,47,53,59]. Circular saw blade geometry is the most significant factor that effects its strength.…”

“…Climb sawing is required more power than counter sawing in terms of cutting processes. At the same time, HSS blades have more impact on power consumption than HW and DP blades [50][51][52][53][54][55].…”