| Abstract [eng] |
Sanding is the final processing of wood and wood-based materials. Eccentric sanding, as the final mechanical processing, is used in the industry of metal processing, plastic products, machinery manufacturing, construction and woodworking. The conducted research was aimed to analyse how the duration of sanding, the size of abrasive grit, the sanding speed and the biological type of wood influence the efficiency of eccentric sanding process, the sanding power and the quality of polished surfaces. Samples of alder and larch wood had been sanded using different sizes of abrasive grits (P80; P120; P180) and different sanding speeds (n = 4,000; 6,400 and 10,000 min-1). The quality of the sanded surfaces was assessed in accordance with three parameters of roughness Ra; Rz and Rmax. The roughness of the surfaces was measured lengthwise, diagonally and at the angle of 45° in respect to the fibres. The study revealed that the performance of the process of eccentric sanding is influenced by the sanding duration, the grit size of the sanding material and the rotation speed of the sanding tool. |
