Influence of Different Machining on the Roughness of Oak Wood

Abstract

The paper presents research on the differences in total roughness and the impact of parameters during different kinds of machining processes of oak samples. Oakwood samples were planed referring to a radial surface structure of wood. The planning machine was Weinig Unimat 500 and the planning head had two blades. The planning was conducted at a feed speed of 10, 15, 20, 25, and 30 m·min-1. The cutting depth of the machining grip was 1.00 mm and the rake angle of the tool blade was bio γ = 15°, at 6000°/min. The diameter of the cutting blade was Φ = 125 mm. Sanding was performed on a Viet Opera V contact sanding machine in combination heads with pre-planning knives and a roller with a sanding belt. Roughness was measured along the grain in the latewood area of the annual growth using the electro-mechanical profiler Mitutoyo SJ-500. The samples which were machined at a feed speed of 10 m·min-1 had the lowest roughness. The highest value of the roughness had samples that were machined at a feed speed of 30 m·min-1. After comparing roughness obtained during sanding and planing it was determined that the surface roughness obtained on a sanding machine approximately corresponds to the roughness obtained by landing at a feed speed of 20 and 25 m·min-1.