Abstract
The article deals with the influence of irregular tooth pitch on energy consumption of cross-cutting wood. In this article, the effect was assessed of feeding velocity and parameters of saw blade on the cutting power Pc of spruce (Picea Abies), pine (Pinus Sylvestris) and beech (Fagus Silvatica) wood during sawing with a guided circular saw. For the research, two types of circular saw blades were used, one of them having irregular tooth pitch. The circular saw blades had sintered carbide inserts with a diameter of D = 350 mm and the same number of teeth. The feed velocities were vf = 4, 8,12 m∙min-1 and revolutions n = 3000 min-1. The results showed that the circular saw blades with irregular tooth pitch have higher energy consumption than the circular saw blades with regular tooth pitch. The highest cutting power Pc was shown in the case of beech. It was also shown that energy consumption is increasing linearly with increasing feed velocity.
Highlights
The results showed that the circular saw blades with irregular tooth pitch have higher energy consumption than the circular saw blades with regular tooth pitch
The measured data of cutting power were analyzed by analytic software STATISICA 12
The effect was assessed of feed velocity, saw blade and wood species on the cutting power Pc of spruce (Picea abies), pine (Pinus sylvestris) and beech (Fagus silvatica) wood during sawing with a guided circular saw
Summary
In the wood cutting process, it is important to keep energy consumption at the lowest possible level. Impacts affecting energy consumption are e.g. cutting conditions (feed per tooth fz, cutting speed vc, feed velocity vf), the choice of material suitable for a cutting tool and geometry of a tool. . Krilek, Ťavodová, Kováč, Tichý: Impact of Irregular Tooth Pitch of Circular Saw Blades. Kinematička shema lista kružne pile: fz – posmak po zubu za list kružne pile s jednakim korakom zubi; fz1,2 – posmak po zubu za list kružne pile s promjenjivim korakom zubi; t – duljina koraka zubi lista kružne pile s jednakim korakom zubi; t1 – duljina koraka zubi lista kružne pile s promjenjivim korakom zubi; hz – visina zubi; vc – brzina rezanja; vf – posmična brzina; α – leđni kut; β – kut oštrice; γ – prsni kut (Siklienka et al, 2013.)
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