engleski

Effect of Different Processing on the Roughness of Oak and Beech Wood

The surface of wood elements is the result of the complex interaction of anatomical, physical and mechanical properties of wood, and the types and parameters of the machining process. This paper presents the research on the effect of two different machining methods on the surface roughness of oak (Quercus robur L.) and beech (Fagus sylvatica L.) wood samples. The first machining method was planing (peripheral milling), with four blades and four feed rates. The cutting depth was 1.00 mm, blade rake angle γ = 15°, cutting edge diameter Φ = 125 mm and rotational frequency of the tool was 8000 min-1. The second processing machine was the automatic milling and widebelt sanding machine, with a head of the milling tool and sanding roller with P80 granulation. The cutting edge diameter of the milling tool was Φ = 250 mm, rake angle γ = 15° and feed rate 10 m·min-1. The depth of milling and sanding was 1.50 mm. The electrical- mechanical profiler Mitutoyo SJ-500 was used for measuring surface roughness according to ISO 4287:1997, through parameters Ra, Rq, and Rz. The study results showed different average values of surface roughness parameters for different machining methods for both wood species. The lowest roughness had beech and oak samples planed at a feed rate of 10 m·min-1. The highest surface roughness had beech and oak wood samples which were planed at a feed rate of 30 m·min-1. .

surface roughness, planing, sanding, processing conditions, feed rate

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