Open AccessRESULTS OF EXPERIMENTAL STUDIES OF THE PROCESS OF CUTTING SOFT WOOD USING DISC BLADES
Author(s) -
Vladimir Ivanovskiy
Publication year - 2021
Publication title -
lesotehničeskij žurnal
Language(s) - English
Resource type - Journals
ISSN - 2222-7962
DOI - 10.34220/issn.2222-7962/2021.2/10
Subject(s) - sharpening , deformation (meteorology) , regression analysis , process (computing) , radius , process variable , water content , factorial experiment , mathematics , materials science , mechanical engineering , engineering , composite material , computer science , statistics , computer security , operating system , geotechnical engineering
The processes of chipless deformation of wood by means of a force field are less laborious and are not as-sociated with significant energy consumption and irrecoverable waste, as in the processing of such wood by chip cutting. To determine the cutting force on a laboratory setup, a factorial experiment was carried out for two main factors: the diameter of the cutting circle and the sharpening angle of the circular blade. Then, to estimate the va-riance characterizing the experimental error, a separate series of 5 experiments was set in the center of the plan, i.e. in conditions where each factor varies at the basic level. A mathematical model in natural values of the factors for the force deformation of wood by a disk has been obtained. Further, the following influencing factors have been investigated: wood thickness and feed rate. The analysis of the obtained regression equation indicates that the thickness of the cut workpiece has a major influence on the cutting power, which imposes a limitation on the feed rate. The next 4-factor experiment made it possible to reveal the combined influence of the named factors, as well as the moisture content of the wood and the length of the cut, on the quality indicators of the cutting process with circular knives. The analysis of the adequacy of the obtained regression equation showed its high accuracy and made it possible to reveal the influence of dominant external factors on the quality of the separated surfaces