| Abstract [eng] |
The central objective of this thesis was to determine the length of grinding, sanding material grits, and the speed of grinding and the influence of certain wood species on grinding process productivity, energy costs and polished surface quality. To achieve these goals, the wood grinding tests were carried out in a wood display, which was created in a „Flader system“ database. Wood samples were grinded along the fiber using three different grinding materials at two different grinding speeds. „Mahr Surf PS1“ tool was used to measure and evaluate the surface roughness parameters Ra, Rz, and Rmax. Surface roughness was measured in the intervals of 5, 10, 15, 20, 25 and 30 minutes. Three sectors were selected in one sample (17,5 x 17,5 mm), and the degree of roughness in the surface was measured along and across the fiber. Three samples were sued to evaluate and determine the unevenness of the surface. All measurement results were processed by statistical methods. The measurement error of unevenness did not exceed ±10 %. The key conclusion was drawn that surface roughness depends on grinding length, sanding material grits, the grinding speed and type of wood. |
