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

This study assessed the effect of selected factors, such as the feed force (F-f = 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 (v(c)) of 62 m.s(-1). The tangentially bucked lumber had a relative humidity (w(r)) 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 (alpha) = 15 degrees, wedge angle (beta) = 60 degrees, and rake angle (y) = 15 degrees) 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.