THE RELATIONSHIP OF THE PITCH OF THE TEETH AND THE AREA OF THE DEPTHS WITH THE FEED TO THE SAW TOOTH DURING CUTTING WOOD OF HARD LEAVED BREEDS

Abstract

The article covers issues related to the sawing of hard hardwoods. In particular, attention is focused on the relationship between the pitch of the teeth and the area of the cavity with the feed per tooth of the frame saw. It is noted that the physical, chemical, physico-mechanical and operational properties of hardwood differ significantly from coniferous and soft hardwood. The wood of hard deciduous species has increased physical and mechanical indicators and has a beautiful texture, which makes it a valuable species of wood. The physical, chemical, physico-mechanical and operational properties of hardwood hardwood are given. It is shown that these properties of wood significantly affect its processing by cutting and determine certain requirements for the structural parameters of the wood-cutting tool. Formulas are given for calculating the productivity of sawmill frames, the technical linear productivity of a frame saw and the productivity of one saw tooth. It is noted that the feed per tooth of the frame saw depends on the shape of the cavity between the teeth, its area, as well as on the hardness of the teeth, their sharpness and the quality of the surface obtained during sawing. Formulas for calculating the feed per saw tooth, the stress coefficient of the cavity, the largest height of the cut in the middle of the length of the log, the coefficient of chip compaction of the cavity, the area of the cavity and the reference value of the log are also given. It is noted that when sawing hardwood, the size of the log reference depends on the pitch of the teeth and the coefficient of the cavity shape. In the process of research, it was concluded that the amount of feed per tooth during sawing of hardwood should be lower by 24 - 29% compared to the amount of feed per tooth for pine.