THEORETICAL STUDY OF NOISE GENERATION DURING DRILLING OF WOOD WORKPIECES WITH REGARD TO THE DRILL FEED RATE

In contrast to metal-cutting machines, woodworking machines are characterized not only by sound pressure levels at the operators’ workplaces that exceed the sanitary standards, but also by dust concentrations that also exceed the standards. At present, a set of theoretical and experimental studies has been carried out and engineering solutions have been proposed to bring vibroacoustic characteristics and dustiness to the sanitary standards for woodworking thickness-jointing machines, band and circular saw machines, model and contour-milling machines. Studies of this kind in relation to woodworking drilling machines have not been done. It should be noted that not only the layout of woodworking drilling machines, but also the dynamics of the drilling process has significant differences from the above mentioned machines.