METHOD OF POWER AND ENERGY PARAMETERS CALCULATION OF CHAINSAW SAWING PROCESS

The power and energy parameters of the sawing process with chainsaws are influenced by a number of factors that must be taken into account when calculating the sawing regimes. The technique of calculation of force, work, power of cutting at sawing of wood of various breeds by chain saws on variable diameters of a log and giving on a tooth is developed and realized. The methodology is based on the use of experimental data obtained in specialized laboratories and published in professional journals. The mathematical model of the methodology is based on the application of definitions, theorems and formulas of elementary algebra, trigonometry, as well as analytical geometry on the plane. The main provisions of the theory of cutting and machining of wood with chainsaws are used. The results of numerical experiments, which are presented in tabular and graphical forms, are presented and analyzed. It was found that the force and power of cutting during sawing with chainsaws is significantly affected by the type of wood, the amount of feed per tooth, as well as the width of the cut. The lowest cutting force and power is recorded for softwoods with a minimum sawing width, and the highest for hardwoods with a maximum cutting width. The total length of the tooth trajectories is significantly affected by the amount of feed on the tooth and, accordingly, the diameter of the log. The smallest value of the length of the trajectories was recorded for the log of the smallest diameter at the maximum feed per tooth, and the largest – for the log of the largest diameter at the minimum feed per tooth. Recommendations for the use of the proposed methodology in the educational process of forest specialties are also given.